# [
](https://github.com/AndyObtiva/glimmer) Glimmer DSL for Tk 0.0.33
## MRI Ruby Desktop Development GUI Library
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**[Contributors Wanted! (Submit a Glimmer App Sample to Get Started)](CONTRIBUTING.md)**
[Glimmer](https://github.com/AndyObtiva/glimmer) DSL for [Tk](https://www.tcl.tk/) enables desktop development with [Glimmer](https://github.com/AndyObtiva/glimmer) in [Ruby](https://github.com/ruby/ruby).
[Tcl/Tk](https://www.tcl.tk/) has recently improved by gaining native looking themed widgets on Mac, Windows, and Linux in [Tk version 8.5](https://www.tcl.tk/software/tcltk/8.5.html#:~:text=Highlights%20of%20Tk%208.5&text=Font%20rendering%3A%20Now%20uses%20anti,and%20window%20layout%2C%20and%20more.). Additionally, [Ruby](https://www.ruby-lang.org/en/) 3.0 Ractor (formerly known as [Guilds](https://olivierlacan.com/posts/concurrency-in-ruby-3-with-guilds/)) supports truly parallel multi-threading, making both [MRI](https://github.com/ruby/ruby) and [Tk](https://www.tcl.tk/) finally viable for support in [Glimmer](https://github.com/AndyObtiva/glimmer) (Ruby Desktop Development GUI Library) as an alternative to [JRuby on SWT](https://github.com/AndyObtiva/glimmer-dsl-swt).
The trade-off is that while [SWT](https://www.eclipse.org/swt/) provides a plethora of high quality reusable widgets for the Enterprise (such as [Nebula](https://github.com/AndyObtiva/glimmer-cw-nebula)), [Tk](https://www.tcl.tk/) has a very fast app startup time and a small memory footprint courtesy of [MRI Ruby](https://www.ruby-lang.org/en/).
[Glimmer DSL for Tk](https://github.com/AndyObtiva/glimmer-dsl-tk) aims to provide a DSL similar to the [Glimmer DSL for SWT](https://github.com/AndyObtiva/glimmer-dsl-swt) to enable more productive desktop development in Ruby with:
- Declarative DSL syntax that visually maps to the GUI widget hierarchy
- Convention over configuration via smart defaults and automation of low-level details
- Requiring the least amount of syntax possible to build GUI
- Bidirectional Data-Binding to declaratively wire and automatically synchronize GUI with Business Models
- Custom Widget support
- Scaffolding for new custom widgets, apps, and gems
- Native-Executable packaging on Mac, Windows, and Linux
**Hello, World!**
Glimmer code (from [samples/hello/hello_world.rb](samples/hello/hello_world.rb)):
```ruby
require 'glimmer-dsl-tk'
include Glimmer
root {
title 'Hello, World!'
label {
text 'Hello, World!'
}
}.open
```
Run with [glimmer-dsl-tk](https://rubygems.org/gems/glimmer-dsl-tk) gem installed:
```
ruby -r glimmer-dsl-tk -e "require 'samples/hello/hello_world'"
```
Glimmer app:
NOTE: Glimmer DSL for Tk is currently in early alpha mode (incomplete). Please help make better by contributing, adopting for small or low risk projects, and providing feedback. It is still an early alpha, so the more feedback and issues you report the better.
Other [Glimmer](https://github.com/AndyObtiva/glimmer) DSL gems:
- [glimmer-dsl-swt](https://github.com/AndyObtiva/glimmer-dsl-swt): Glimmer DSL for SWT (JRuby Desktop Development GUI Framework)
- [glimmer-dsl-libui](https://github.com/AndyObtiva/glimmer-dsl-libui): Glimmer DSL for LibUI (Prerequisite-Free Ruby Desktop Development GUI Library)
- [glimmer-dsl-opal](https://github.com/AndyObtiva/glimmer-dsl-opal): Glimmer DSL for Opal (Pure Ruby Web GUI and Auto-Webifier of Desktop Apps)
- [glimmer-dsl-xml](https://github.com/AndyObtiva/glimmer-dsl-xml): Glimmer DSL for XML (& HTML)
- [glimmer-dsl-css](https://github.com/AndyObtiva/glimmer-dsl-css): Glimmer DSL for CSS (Cascading Style Sheets)
## Table of Contents
- [Glimmer DSL for Tk](#)
- [MRI Ruby Desktop Development GUI Library](#mri-ruby-desktop-development-gui-library)
- [Pre-requisites](#pre-requisites)
- [Setup](#setup)
- [Option 1: Install](#option-1-install)
- [Option 2: Bundler](#option-2-bundler)
- [Girb (Glimmer IRB)](#girb-glimmer-irb)
- [Tk Concepts](#tk-concepts)
- [Glimmer GUI DSL Concepts](#glimmer-gui-dsl-concepts)
- [Supported Widgets](#supported-widgets)
- [Common Attributes](#common-attributes)
- [Common Themed Widget States](#common-themed-widget-states)
- [Text API](#text-api)
- [Drag and Drop API](#drag-and-drop-api)
- [Smart Defaults and Conventions](#smart-defaults-and-conventions)
- [Grid Layout](#grid-layout)
- [Image Attribute](#image-attribute)
- [Frame Padding](#frame-padding)
- [Notebook Frame](#notebook-frame)
- [Icon Photo](#icon-photo)
- [Root Background](#root-background)
- [Text Defaults](#text-defaults)
- [The Grid Geometry Manager](#the-grid-geometry-manager)
- [Data-Binding](#data-binding)
- [Label Data-Binding](#label-data-binding)
- [Combobox Data-Binding](#combobox-data-binding)
- [List Single Selection Data-Binding](#list-single-selection-data-binding)
- [List Multi Selection Data-Binding](#list-multi-selection-data-binding)
- [Entry Data-Binding](#entry-data-binding)
- [Text Data-Binding](#text-data-binding)
- [Spinbox Data-Binding](#spinbox-data-binding)
- [Checkbutton Data-Binding](#checkbutton-data-binding)
- [Radiobutton Data-Binding](#radiobutton-data-binding)
- [Command Callback](#command-callback)
- [Gotchas](#gotchas)
- [Samples](#samples)
- [Hello, World!](#hello-world)
- [Hello, Button!](#hello-button)
- [Hello, Checkbutton!](#hello-checkbutton)
- [Hello, Radiobutton!](#hello-radiobutton)
- [Hello, Frame!](#hello-frame)
- [Hello, Root!](#hello-root)
- [Hello, Notebook!](#hello-notebook)
- [Hello, Label!](#hello-label)
- [Hello, Message Box!](#hello-message-box)
- [Hello, Combobox!](#hello-combobox)
- [Hello, List Single Selection!](#hello-list-single-selection)
- [Hello, List Multi Selection!](#hello-list-multi-selection)
- [Hello, Entry!](#hello-entry)
- [Hello, Text!](#hello-text)
- [Hello, Spinbox!](#hello-spinbox)
- [Hello, Computed!](#hello-computed)
- [Hello, Drag and Drop!](#hello-drag-and-drop)
- [Hello, Built-in Dialog!](#hello-built-in-dialog)
- [Hello, Separator!](#hello-separator)
- [Applications](#applications)
- [Glimmer Tk Calculator](#glimmer-tk-calculator)
- [Y3network Ruby UI](#y3network-ruby-ui)
- [CryptoPunks GUI](#cryptopunks-gui)
- [Process](#process)
- [Resources](#resources)
- [Help](#help)
- [Issues](#issues)
- [Chat](#chat)
- [Planned Features and Feature Suggestions](#planned-features-and-feature-suggestions)
- [Change Log](#change-log)
- [Contributing](#contributing)
- [Contributors](#contributors)
- [License](#license)
## Pre-requisites
- [Tcl/Tk](https://www.tcl.tk/): Follow the [install instructions](https://tkdocs.com/tutorial/install.html)
- [Ruby](https://www.ruby-lang.org/en/): On Windows, obtain from the Ruby [download page](https://www.ruby-lang.org/en/downloads/). On the Mac and Linux, it is more convenient to just use [RVM](http://rvm.io) and follow the [RVM Tk instructions](https://rvm.io/integration/tk).
For example, on the Mac, you can:
- Install the ActiveTcl Mac package from [ActiveState.com](https://activestate.com)
- Install [RVM](https://rvm.io/) by running `\curl -sSL https://get.rvm.io | bash -s stable` (and run `curl -sSL https://rvm.io/pkuczynski.asc | gpg --import -` if needed for mentioned security reasons)
- Run: `rvm install 3.0.2 --enable-shared --enable-pthread --with-tk --with-tcl`
- Run: `gem install tk -v0.4.0`
Afterwards, if you open `irb`, you should be able to run `require 'tk'` successfully.
## Setup
### Option 1: Install
Run this command to install directly:
```
gem install glimmer-dsl-tk
```
### Option 2: Bundler
Add the following to `Gemfile`:
```
gem 'glimmer-dsl-tk', '~> 0.0.33'
```
And, then run:
```
bundle
```
## Girb (Glimmer IRB)
You can run the `girb` command (`bin/girb` if you cloned the project locally):
```
girb
```
This gives you `irb` with the `glimmer-dsl-tk` gem loaded and the `Glimmer` module mixed into the main object for easy experimentation with GUI.
## Tk Concepts
Here is a summary taken from the official [Tk Concepts Tutorial](https://tkdocs.com/tutorial/concepts.html)
Tk Concepts consist of:
- [Widgets](https://tkdocs.com/tutorial/concepts.html#widgets): Widgets are all the things that you see onscreen. In our example, we had a button, an entry, a few labels, and a frame. Others are things like checkboxes, tree views, scrollbars, text areas, and so on. Widgets are what are often referred to as "controls"; you'll also often see them referred to as "windows," particularly in Tk's documentation, a holdover from its X11 roots (so under that terminology, both a toplevel window and things like a button would be called windows).
- [Geometry Management](https://tkdocs.com/tutorial/concepts.html#geometry): If you've been playing around creating widgets, you've probably noticed that just by creating them, they didn't end up showing up onscreen. Having things actually put in the onscreen window, and precisely where in the window they show up is a separate step called geometry management.
- [Event Handling](https://tkdocs.com/tutorial/concepts.html#events): In Tk, as in most other user interface toolkits, there is an event loop which receives events from the operating system. These are things like button presses, keystrokes, mouse movement, window resizing, and so on.
Learn more at the official [Tk Concepts Tutorial](https://tkdocs.com/tutorial/concepts.html)
## Glimmer GUI DSL Concepts
The Glimmer GUI DSL provides a declarative syntax for [Tk](https://www.tcl.tk/) that:
- Supports smart defaults (e.g. grid layout on most widgets)
- Automates wiring of widgets (e.g. nesting a label under a toplevel root or adding a frame to a notebook)
- Hides lower-level details (e.g. main loop is started automatically when opening a window)
- Nests widgets according to their visual hierarchy
- Requires the minimum amount of syntax needed to describe an app's GUI
The Glimmer GUI DSL follows these simple concepts in mapping from Tk syntax:
- **Widget Keyword**: Any Tk widget (e.g. `Tk::Tile::Label`) or toplevel window (e.g. `TkRoot`) may be declared by its lower-case underscored name without the namespace (e.g. `label` or `root`). This is called a keyword and is represented in the Glimmer GUI DSL by a Ruby method behind the scenes.
- **Args**: Any keyword method may optionally take arguments surrounded by parentheses (e.g. a `frame` nested under a `notebook` may receive tab options like `frame(text: 'Users')`, which gets used behind the scenes by Tk code such as `notebook.add tab, text: 'Users'`)
- **Content/Options Block**: Any keyword may optionally be followed by a Ruby curly-brace block containing nested widgets (content) and attributes (options). Attributes are simply Tk option keywords followed by arguments and no block (e.g. `title 'Hello, World!'` under a `root`)
- **Event Binding Block**: `on(event) {}` keyword receiving a Tk binding event name (e.g. `KeyPress` or `ComboboxSelected`). Surrounding event by `<>` is optional as [Glimmer DSL for Tk](https://rubygems.org/gems/glimmer-dsl-tk) can take care of that automatically.
Example of an app written in [Tk](https://www.tcl.tk/) imperative syntax:
```ruby
root = TkRoot.new
root.title = 'Hello, Notebook!'
notebook = ::Tk::Tile::Notebook.new(root).grid
tab1 = ::Tk::Tile::Frame.new(notebook).grid
notebook.add tab1, text: 'English'
label1 = ::Tk::Tile::Label.new(tab1).grid
label1.text = 'Hello, World!'
tab2 = ::Tk::Tile::Frame.new(notebook).grid
notebook.add tab2, text: 'French'
label2 = ::Tk::Tile::Label.new(tab2).grid
label2.text = 'Bonjour, Univers!'
root.bind('KeyPress') do |event|
case event.keysym
when 'e', 'E'
notebook.select(0)
when 'f', 'F'
notebook.select(1)
end
end
root.mainloop
```
Example of the same app written in [Glimmer](https://github.com/AndyObtiva/glimmer) declarative syntax:
```ruby
root {
title 'Hello, Notebook!'
@notebook = notebook {
frame(text: 'English') {
label {
text 'Hello, World!'
}
}
frame(text: 'French') {
label {
text 'Bonjour, Univers!'
}
}
}
on('KeyPress') do |event|
case event.keysym
when 'e', 'E'
@notebook.select(0)
when 'f', 'F'
@notebook.select(1)
end
end
}.open
```
### Supported Widgets
keyword(args) | attributes | event bindings & callbacks
------------- | ---------- | ---------
`button` | `text`, `image` (optional keyword args: `subsample`, `zoom`, `from`, `to`, `shrink`, `compositingrule`), `compound` (`'center', 'top', 'bottom', 'left', 'right'`), `default` (`'active', 'normal'`) | `command {}`
`checkbutton` | `text`, `variable` (Boolean), `image` (optional keyword args: `subsample`, `zoom`, `from`, `to`, `shrink`, `compositingrule`), `compound` (`'center', 'top', 'bottom', 'left', 'right'`), `onvalue` (default: `1`), `offvalue` (default: `0`) | `command {}`
`choose_color(options = nil)` | None | None
`choose_directory(options = nil)` | None | None
`choose_font(options = nil) {|font| ... }` | None | None
`combobox` | `state`, `text` | `'ComboboxSelected'`
`entry` | `width`, `text`, `validate`, `show` (`'none', 'focus', 'focusin', 'focusout', 'key', or 'all'`) | `'validate'`, `'invalid'`, `'change'` (alias: `'changed'`), `validatecommand {}`, `invalidcommand {}`
`get_multiple_open_file(options = nil)` | None | None
`get_open_file(options = nil)` | None | None
`get_save_file(options = nil)` | None | None
`spinbox` | `text`, `from`, `to`, `increment`, `format`, [more attributes](https://tcl.tk/man/tcl8.6/TkCmd/text.htm#M116) | `command {}`, `'increment'`, `'decrement'`
`frame(text: nil)` | `width`, `height`, `borderwidth`, `relief` (`'flat' (default), 'raised', 'sunken', 'solid', 'ridge', 'groove'`) | None
`label` | `text`, `image` (optional keyword args: `subsample`, `zoom`, `from`, `to`, `shrink`, `compositingrule`), `compound` (`'center', 'top', 'bottom', 'left', 'right'`), `font` (`'default', 'text', 'fixed', 'menu', 'heading', 'caption', 'small_caption', 'icon', 'tooltip'`), `relief` (`'flat' (default), 'raised', 'sunken', 'solid', 'ridge', 'groove'`), `justify` (`'left', 'center', 'right'`), `foreground`, `background` | None
`list` | `selectmode`, `selection` | None
`message_box(type: , message: , detail: , title: , icon: , default: , parent: )` | None | None
`notebook` | None | None
`radiobutton` | `text`, `variable` (Boolean), `image` (optional keyword args: `subsample`, `zoom`, `from`, `to`, `shrink`, `compositingrule`), `compound` (`'center', 'top', 'bottom', 'left', 'right'`), `value` (default: `text`) | `command {}`
`root` | `title`, `iconphoto`, `background`, `alpha`, `fullscreen?`, `topmost?`, `transparent?`, `stackorder`, `winfo_screendepth`, `winfo_screenvisual`, `winfo_screenwidth`, `winfo_screenheight`, `winfo_pixels('li')`, `winfo_screen`, `wm_maxsize`, `state` (`'normal', 'iconic', 'withdrawn', 'icon', 'zoomed'`) | `'DELETE_WINDOW'`, `'OPEN_WINDOW'`
`separator` | `orient` (`'horizontal' (default) or 'vertical'`) | None
`text` | `value`, [many more attributes](https://tcl.tk/man/tcl8.6/TkCmd/text.htm#M116) | `'modified'`, `'selection'`, `'insert_mark_moved'` (alias: `'insert_mark_move', 'InsertMarkMove', 'InsertMarkMoved'`)
Options for `get_open_file` and `get_multiple_open_file` include:
- `filetypes`: `Hash` of `'Group Name' => '.ext'` entries (e.g. `filetypes: {'PNG Images' => '.png'}`
#### Common Attributes
- `grid`: `Hash` of `:row`, `:column`, `:padx`, `:pady`, `:sticky` (`'e', 'w', 'n', 's'` or any combination of direction letters)
#### Common Event Bindings
- `Activate`
- `Deactivate`
- `MouseWheel`
- `KeyPress`
- `KeyRelease`
- `ButtonPress`
- `ButtonRelease`
- `Motion`
- `Configure`
- `Map`
- `Unmap`
- `Visibility`
- `Expose`
- `Destroy`
- `FocusIn`
- `FocusOut`
- `Enter`
- `Leave`
- `Property`
- `Colormap`
- `MapRequest`
- `CirculateRequest`
- `ResizeRequest`
- `ConfigureRequest`
- `Create`
- `Gravity`
- `Reparent`
- `Circulate`
#### Common Themed Widget States
- `active?`
- `disabled?`
- `focus?`
- `pressed?`
- `selected?`
- `background?`
- `readonly?`
- `alternate?`
- `invalid?`
- `hover?`
#### Text API
The `text` widget is enhanced by [Glimmer DSL for Tk](https://rubygems.org/gems/glimmer-dsl-tk) to enable simpler manipulation of text options without dealing with [tags](https://tkdocs.com/tutorial/text.html) directly. Simply specify region to mutate and option/value or font_option/value, and [Glimmer DSL for Tk](https://rubygems.org/gems/glimmer-dsl-tk) takes care of the rest by automating work of adding/removing [tags](https://tkdocs.com/tutorial/text.html) behind the scenes.
- `add_format(region_start, region_end, option, value)`
- `remove_format(region_start, region_end, option, value)`
- `toggle_format(region_start, region_end, option, value)`
- `add_font_format(region_start, region_end, font_option, value)`
- `remove_font_format(region_start, region_end, font_option, value)`
- `toggle_font_format(region_start, region_end, font_option, value)`
- `add_selection_format(region_start, region_end, option, value)`
- `remove_selection_format(region_start, region_end, option, value)`
- `toggle_selection_format(region_start, region_end, option, value)`
- `add_selection_font_format(region_start, region_end, font_option, value)`
- `remove_selection_font_format(region_start, region_end, font_option, value)`
- `toggle_selection_font_format(region_start, region_end, font_option, value)`
- `text#insert_image(text_index, *image_args)`: inserts image into `text` `value` content at `text_index` location (e.g. `'insert'`)
- `text#get_open_file_to_insert_image(text_index = 'insert')`: opens a file dialog to select one of the available image formats and then inserts image into `text` `value` content
Available options:
- `background`
- `bgstipple`
- `borderwidth`
- `elide`
- `fgstipple`
- `foreground`
- `justify`
- `lmargin1`
- `lmargin2`
- `offset`
- `overstrike`
- `relief`
- `rmargin`
- `spacing1`
- `spacing2`
- `spacing3`
- `tabs`
- `tabstyle`
- `underline`
- `wrap`
Available font options:
- `family` (default: `'Courier New'`)
- `size` (default: `13`)
- `weight` (default: `'normal'`) (e.g. `'bold'`)
- `slant` (default: `'roman'`) (e.g. `'italic`')
- `underline` (default: `false`)
- `overstrike` (default: `false`)
Other useful built-in API methods:
- `text_cut`
- `text_copy`
- `text_paste`
- `text_edit_undo`
- `text_edit_redo`
Check out the [Hello, Text!](#hello-text) sample for a good demonstration of the `text` widget features.
#### Drag and Drop API
Drag and drop works by simply designating a widget as a drag source with attribute `drag_source true`
Alternatively, add listeners:
- `on_drag_start {|event| ...}`: fires on drag start receiving an `event` arg to set `data` and configure `source`
- `on_drag_motion {|event| ...}`: fires on drag motion receiving an `event` arg to check `event#drop_accepted`, and configure `source` and `tooltip`
On the drop target, you simply define:
- `on_drop { |event| ...}`: fires on drop, receiving an `event` arg with `event#target` and `event#data` (set during drag). You can even destroy the `event#source` if you want to get rid of the dragged widget.
Learn more at the [Hello, Drag and Drop!](#hello-drag-and-drop) sample.
### Smart Defaults and Conventions
#### Event Bindings
Any events that normally can be accepted by the Tk `bind` or `protocol` methods can be accepted by the `on(event) {}` listener syntax. For actual (non-virtual) events, there is no need to surround event name by `<>` as [Glimmer DSL for Tk](https://rubygems.org/gems/glimmer-dsl-tk) automatically takes care of that when needed and leaves out when not needed.
#### Grid Layout
`grid` layout with `sticky: 'nsew'` is the default on all widgets except toplevel widgets.
Also, any widget that is the first in a series of siblings has `column_weight` as `1` to automatically resize with window resizing by default.
To override that behavior, you may set alternative `grid` keyword args if needed (e.g. `grid sticky: '', column_weight: 0` disables the smart defaults).
#### Image Attribute
Widget `image` attribute (e.g. `label` `image`) can accept image path directly as an alternative to `TkPhotoImage` object in addition to key values for automatic processing of image:
- `subsample(x_divider, y_divider)`: Specifies that the source image should be reduced in size by using only every xth pixel in the X direction and yth pixel in the Y direction. Negative values will cause the image to be flipped about the Y or X axes, respectively. If y is not given, the default value is the same as x.
- `zoom(x_multiplier, y_multiplier)`: Specifies that the source region should be magnified by a factor of x in the X direction and y in the Y direction. If y is not given, the default value is the same as x. With this option, each pixel in the source image will be expanded into a block of x x y pixels in the destination image, all the same color. x and y must be greater than 0.
- `from(x1, y1, x2, y2)`: Specifies a rectangular sub-region of the source image to be copied. (x1,y1) and (x2,y2) specify diagonally opposite corners of the rectangle. If x2 and y2 are not specified, the default value is the bottom-right corner of the source image. The pixels copied will include the left and top edges of the specified rectangle but not the bottom or right edges. If the :from option is not given, the default is the whole source image.
- `to(x1, y1, x2, y2)`: Specifies a rectangular sub-region of the destination image to be affected. (x1,y1) and (x2,y2) specify diagonally opposite corners of the rectangle. If x2 and y2 are not specified, the default value is (x1,y1) plus the size of the source region (after subsampling and zooming, if specified). If x2 and y2 are specified, the source region will be replicated if necessary to fill the destination region in a tiled fashion.
- `shrink`: Specifies that the size of the destination image should be reduced, if necessary, so that the region being copied into is at the bottom-right corner of the image. This option will not affect the width or height of the image if the user has specified a non-zero value for the :width or :height configuration option, respectively.
- `compositingrule` (can be `'overlay'` or `'set'`): Specifies how transparent pixels in the source image are combined with the destination image. When a compositing rule of overlay is set, the old contents of the destination image are visible, as if the source image were printed on a piece of transparent film and placed over the top of the destination. When a compositing rule of set is set, the old contents of the destination image are discarded and the source image is used as-is. The default compositing rule is overlay.
#### Frame Padding
Frames have a padding of `15` all around by default to produce more user-friendly graphical user interfaces.
#### Notebook Frame
When nesting `frame` under `notebook`, you can pass a `:text` keyword argument to indicate the tab title.
#### Icon Photo
The `iconphoto` attribute on `root` is set to the Glimmer icon by default if no icon photo is supplied.
Otherwise, [Glimmer DSL for Tk](https://rubygems.org/gems/glimmer-dsl-tk) is smart enough to accept an image path directly (no need to wrap with `TkPhotoImage`)
Example with direct image path (you may copy/paste in [`girb`](#girb-glimmer-irb)):
```ruby
root {
title 'Title'
iconphoto 'icons/glimmer.png'
}.open
```
Example with `TkPhotoImage` object (you may copy/paste in [`girb`](#girb-glimmer-irb)):
```ruby
root {
title 'Title'
iconphoto TkPhotoImage.new(file: 'icons/glimmer.png')
}.open
```
#### Root Background
`root` `background` color attribute is automatically set to `'#ececec'` on the Mac to avoid having a non-native-looking light-colored background.
#### Text Defaults
`text` widget has these defaults:
- `wrap = 'none'`
- `font = {family: 'Courier New'}`
## The Grid Geometry Manager
The Grid Geometry Manager is supported via the `grid` keyword just as per the [Tk documentation](https://tkdocs.com/tutorial/grid.html), except by nesting under the widget it concerns.
Example:
```ruby
label {
grid column: 0, row: 2, sticky: 'w'
text 'Year of Birth: '
}
entry {
grid column: 1, row: 2
width 15
text <=> [@contact, :year_of_birth]
}
```
Extra convenience options may be passed to `grid` when using [Glimmer DSL for Tk](https://rubygems.org/gems/glimmer-dsl-tk):
- `column_span`: alias for `columnspan` keyword arg
- `row_span`: alias for `rowspan` keyword arg
- `min_width`: alias for `columnminsize` being called on `TkGrid.columnconfigure`
- `min_height`: alias for `rowminsize` being called on `TkGrid.rowconfigure`
- `column_weight`: alias for `columnweight` being called on `TkGrid.columnconfigure`
- `row_weight`: alias for `rowweight` being called on `TkGrid.rowconfigure`
Note also the [Grid Layout](#grid-layout) conventions (e.g. `column_weight` is automatically set to `1` for the first widget in a series of siblings to automatically have all resize when window resize)
More details can be found in the [Hello, Computed!](#hello-computed) sample below.
## Data-Binding
Glimmer supports Shine syntax bidirectional data-binding via the `<=>` operator (read-write) and unidirectional data-binding via the `<=` operator (read-only), which takes a model and an attribute (the `bind` keyword may also be used as the old-style of data-binding).
### Label Data-Binding
Example:
This assumes a `Person` model with a `country` attribute.
```ruby
label {
text <= [person, :country]
}
```
That code binds the `textvariable` value of the `label` unidirectionally (read-only) to the `country` property on the `person` model.
It automatically handles all the Tk plumbing behind the scenes.
More details can be found in the [Hello, Computed!](#hello-computed) sample below.
### Combobox Data-Binding
Example:
This assumes a `Person` model with a `country` attribute representing their current country and a `country_options` attribute representing available options for the country attribute.
```ruby
combobox {
readonly true # this applies to text editing only (item selection still triggers a write to model)
text <=> [person, :country]
}
```
That code sets the `values` of the `combobox` to the `country_options` property on the `person` model (data-binding attribute + "_options" by convention).
It also binds the `text` selection of the `combobox` to the `country` property on the `person` model.
It automatically handles all the Tk plumbing behind the scenes, such as using `TkVariable` and setting `combobox` `values` from `person.country_options` by convention (attribute_name + "_options").
More details can be found in the [Hello, Combobox!](#hello-combobox) sample below.
### List Single Selection Data-Binding
Tk does not support a native themed listbox, so Glimmer implements its own `list` widget on top of `Tk::Tile::Treeview`. It is set to single selection via selectmode 'browse'.
Example:
This assumes a `Person` model with a `country` attribute representing their current country and a `country_options` attribute representing available options for the country attribute.
```ruby
list {
selectmode 'browse'
text <=> [person, :country]
}
```
That code binds the `items` text of the `list` to the `country_options` attribute on the `person` model (data-binding attribute + "_options" by convention).
It also binds the `selection` text of the `list` to the `country` attribute on the `person` model.
It automatically handles all the Tk plumbing behind the scenes.
More details can be found in the [Hello, List Single Selection!](#hello-list-single-selection) sample below.
### List Multi Selection Data-Binding
Tk does not support a native themed listbox, so Glimmer implements its own `list` widget on top of `Tk::Tile::Treeview`. It is set to multi selection by default.
Example:
This assumes a `Person` model with a `provinces` attribute representing their current country and a `provinces_options` attribute representing available options for the provinces attribute.
```ruby
list {
text <=> [person, :provinces]
}
```
That code binds the `items` text of the `list` to the `provinces_options` attribute on the `person` model (data-binding attribute + "_options" by convention).
It also binds the `selection` text of the `list` to the `provinces` attribute on the `person` model.
It automatically handles all the Tk plumbing behind the scenes.
More details can be found in the [Hello, List Multi Selection!](#hello-list-multi-selection) sample below.
### Entry Data-Binding
Example:
This assumes a `Person` model with a `country` attribute.
```ruby
entry {
text <=> [person, :country]
}
```
That code binds the `textvariable` value of the `entry` to the `country` attribute on the `person` model.
It automatically handles all the Tk plumbing behind the scenes.
More details can be found in [Hello, Entry!](#hello-entry) and [Hello, Computed!](#hello-computed) samples below.
### Text Data-Binding
Example:
This assumes a `Person` model with a `biography` attribute.
```ruby
text {
value <=> [person, :biography]
}
```
That code binds the `value` of `text` to the `biography` attribute on the `person` model.
It automatically handles all the Tk plumbing behind the scenes.
More details can be found in [Hello, Text!](#hello-text) sample below.
### Spinbox Data-Binding
Example:
This assumes a `Person` model with a `donation` attribute.
```ruby
spinbox {
from 1.0 # minimum value
to 150.0 # maximum value
increment 5.0 # increment on up and down
format '%0.2f'
text <=> [person, :country]
}
```
That code binds the `textvariable` value of the `spinbox` to the `donation` attribute on the `person` model.
It automatically handles all the Tk plumbing behind the scenes.
More details can be found in [Hello, Spinbox!](#hello-spinbox) sample below.
### Checkbutton Data-Binding
Example:
This assumes a `Person` model with a boolean `adult` attribute.
```ruby
checkbutton {
variable <=> [person, :adult]
}
```
That code binds the `variable` value of the `checkbutton` to the boolean `adult` attribute on the `person` model.
It automatically handles all the Tk plumbing behind the scenes.
If you need to display a half-checked `checkbutton`, bind to `alternate` attribute.
More details can be found in the [Hello, Checkbutton!](#hello-checkbutton) sample below.
### Radiobutton Data-Binding
Example:
This assumes a `Person` model with boolean `male` and `female` attributes.
```ruby
radiobutton {
text 'Male'
variable <=> [@person, :male]
}
radiobutton {
text 'Female'
variable <=> [@person, :female]
}
```
That code binds the `variable` value of the `radiobutton` to the boolean `male` and `female` attributes on the `person` model.
It automatically handles all the Tk plumbing behind the scenes, including setting the `radiobutton` `value` (uses `text` attribute as `value`), enabling an API that works with simple booleans for each `radiobutton`.
For very rare cases, if you need to display a half-selected `radiobutton`, set `alternate` attribute as `true` when the `variable` value is `false`.
More details can be found in the [Hello, Radiobutton!](#hello-radiobutton) sample below.
## Command Callback
`button`, `spinbox`, `radiobutton` and `checkbutton` can set a `command` block to trigger when the user clicks the button/checkbutton. This may be done with the `command` keyword, passing in a block directly.
Example:
```ruby
button {
text "Reset Selection"
command {
person.reset_country
}
}
```
Alternatively, it can be treated as simply an event for consistency with other event bindings:
```ruby
button {
text "Reset Selection"
on('command') do
person.reset_country
end
}
```
More details can be found in the [Hello, Button!](#hello-button) sample below.
## Gotchas
- Setting `background` attribute on `frame` or `label` does not work in `'aqua'` theme on the Mac (only in `'classic'` theme)
## Samples
The easiest way to run samples is by launching the Glimmer Meta-Sample (the Sample of Samples).
Run with [glimmer-dsl-tk](https://rubygems.org/gems/glimmer-dsl-tk) gem installed:
```
ruby -r glimmer-dsl-tk -e "require 'samples/elaborate/meta_sample'"
```
Alternatively, run from cloned project without [glimmer-dsl-tk](https://rubygems.org/gems/glimmer-dsl-tk) gem installed:
```
ruby -r ./lib/glimmer-dsl-tk.rb samples/elaborate/meta_sample.rb
```
Code:
```ruby
require 'glimmer-dsl-tk'
require 'facets'
require 'fileutils'
class MetaSample
include Glimmer
attr_accessor :selected_sample_index
def initialize
@selected_sample_index = 0
end
def samples
if @samples.nil?
sample_files = Dir.glob(File.join(File.expand_path('../hello', __dir__), '**', 'hello_*.rb'))
sample_file_names = sample_files.map { |f| File.basename(f, '.rb') }
sample_file_names = sample_file_names.reject { |f| f == 'meta_sample' || f.match(/\d$/) }
@samples = sample_file_names.map { |f| f.underscore.titlecase }
end
@samples
end
def file_path_for(sample)
File.join(File.expand_path('../hello', __dir__), "#{sample.underscore}.rb")
end
def glimmer_dsl_tk_file
File.expand_path('../../lib/glimmer-dsl-tk', __dir__)
end
def selected_sample
samples[@selected_sample_index]
end
def run_sample(sample)
Thread.new do
command = "ruby -r #{glimmer_dsl_tk_file} #{sample} 2>&1"
result = ''
IO.popen(command) do |f|
f.each_line do |line|
result << line
puts line
$stdout.flush
end
end
::Tk.after(100) do
message_box(parent: @root, title: 'Error Running Sample', message: result) if result.downcase.include?('error')
end
end
end
def launch
@root = root {
title 'Glimmer Meta-Sample'
width 1280
height 720
frame {
grid row: 0, column: 0, column_weight: 0, row_weight: 1
samples.each_with_index do |sample, index|
radiobutton {
text sample
variable <=> [self, :selected_sample_index, on_write: ->(v) {v ? index : selected_sample_index}, on_read: ->(v) {v == index}]
on('command') do
@selected_sample_index = index
@code_text.value = File.read(file_path_for(selected_sample))
end
}
end
frame {
button {
grid row: 0, column: 0
text 'Launch'
on('command') do
begin
parent_dir = File.join(Dir.home, '.glimmer-dsl-tk', 'samples', 'hello')
FileUtils.mkdir_p(parent_dir)
sample_file = File.join(parent_dir, "#{selected_sample.underscore}.rb")
File.write(sample_file, @code_text.value)
FileUtils.cp_r(File.expand_path('../../icons', __dir__), File.dirname(File.dirname(parent_dir)))
FileUtils.cp_r(File.expand_path('../hello/images', __dir__), parent_dir)
sample_namespace_directory = File.expand_path("../hello/#{selected_sample.underscore}", __dir__)
FileUtils.cp_r(sample_namespace_directory, parent_dir) if Dir.exist?(sample_namespace_directory)
run_sample(sample_file)
rescue => e
puts e.full_message
puts 'Unable to write code changes! Running original sample...'
run_sample(file_path_for(selected_sample))
end
end
}
button {
grid row: 0, column: 1
text 'Reset'
on('command') do
@code_text.value = File.read(file_path_for(selected_sample))
end
}
}
}
@code_text = text {
grid row: 0, column: 1, column_weight: 1
value File.read(file_path_for(selected_sample))
}
}
@root.open
end
end
MetaSample.new.launch
```
### Hello, World!
Glimmer code (from [samples/hello/hello_world.rb](samples/hello/hello_world.rb)):
```ruby
require 'glimmer-dsl-tk'
include Glimmer
root {
title 'Hello, World!'
label {
text 'Hello, World!'
}
}.open
```
Run with [glimmer-dsl-tk](https://rubygems.org/gems/glimmer-dsl-tk) gem installed:
```
ruby -r glimmer-dsl-tk -e "require 'samples/hello/hello_world'"
```
Alternatively, run from cloned project without [glimmer-dsl-tk](https://rubygems.org/gems/glimmer-dsl-tk) gem installed:
```
ruby -r ./lib/glimmer-dsl-tk.rb samples/hello/hello_world.rb
```
Glimmer app:
### Hello, Button!
Glimmer code (from [samples/hello/hello_button.rb](samples/hello/hello_button.rb)):
```ruby
require 'glimmer-dsl-tk'
class HelloButton
include Glimmer
attr_accessor :count
def initialize
@count = 0
end
def launch
root {
title 'Hello, Button!'
frame {
grid row: 0, column: 0
label {
grid pady: 15
text 'Text Button'
}
button {
text <= [self, :count, on_read: ->(value) { "Click To Increment: #{value} " }]
default 'active'
focus true
command {
self.count += 1
}
}
}
frame {
grid row: 0, column: 1
label {
grid pady: 15
text 'Image Button'
}
button {
image File.expand_path('../../icons/glimmer.png', __dir__), subsample: 5
command {
message_box(title: 'Image Button', message: 'Image Button Clicked!')
}
}
}
frame {
grid row: 0, column: 2
label {
grid pady: 15
text 'Text Image Buttons'
}
['center', 'top', 'bottom', 'left', 'right'].each do |compound_option|
button {
image File.expand_path('../../icons/glimmer.png', __dir__), subsample: 5
text 'Text Image Button'
compound compound_option
command {
message_box(title: 'Text Image Button', message: 'Text Image Button Clicked!', detail: "(#{compound_option})")
}
}
end
}
}.open
end
end
HelloButton.new.launch
```
Run with [glimmer-dsl-tk](https://rubygems.org/gems/glimmer-dsl-tk) gem installed:
```
ruby -r glimmer-dsl-tk -e "require 'samples/hello/hello_button'"
```
Alternatively, run from cloned project without [glimmer-dsl-tk](https://rubygems.org/gems/glimmer-dsl-tk) gem installed:
```
ruby -r ./lib/glimmer-dsl-tk.rb samples/hello/hello_button.rb
```
Glimmer app:
### Hello, Checkbutton!
Glimmer code (from [samples/hello/hello_checkbutton.rb](samples/hello/hello_checkbutton.rb)):
```ruby
require 'glimmer-dsl-tk'
class HelloCheckbutton
class Person
attr_accessor :skiing, :snowboarding, :snowmobiling, :snowshoeing, :snow_activities, :snow_activities_alternate
def initialize
reset_activities!
individual_observer = Glimmer::DataBinding::Observer.proc do
unless @updating_group
@updating_individual = true
if skiing && snowboarding && snowmobiling && snowshoeing
self.snow_activities = true
self.snow_activities_alternate = false
elsif skiing || snowboarding || snowmobiling || snowshoeing
self.snow_activities = true
self.snow_activities_alternate = true
else
self.snow_activities = false
self.snow_activities_alternate = false
end
@updating_individual = false
end
end
individual_observer.observe(self, :skiing)
individual_observer.observe(self, :snowboarding)
individual_observer.observe(self, :snowmobiling)
individual_observer.observe(self, :snowshoeing)
group_observer = Glimmer::DataBinding::Observer.proc do
unless @updating_individual
@updating_group = true
self.skiing = self.snow_activities
self.snowboarding = self.snow_activities
self.snowmobiling = self.snow_activities
self.snowshoeing = self.snow_activities
@updating_group = false
end
end
group_observer.observe(self, :snow_activities)
end
def reset_activities!
self.snow_activities = true
self.snow_activities_alternate = true
self.skiing = false
self.snowboarding = true
self.snowmobiling = false
self.snowshoeing = false
end
end
include Glimmer
def initialize
@person = Person.new
end
def launch
root {
title 'Hello, Checkbutton!'
background '#ececec' if OS.mac?
label {
text 'Check all snow activities you are interested in:'
font 'caption'
}
frame {
checkbutton {
text 'Snow Activities'
variable <=> [@person, :snow_activities]
alternate <=> [@person, :snow_activities_alternate] # binds half-checked state
}
frame {
checkbutton {
text 'Skiing'
variable <=> [@person, :skiing]
}
checkbutton {
text 'Snowboarding'
variable <=> [@person, :snowboarding]
}
checkbutton {
text 'Snowmobiling'
variable <=> [@person, :snowmobiling]
}
checkbutton {
text 'Snowshoeing'
variable <=> [@person, :snowshoeing]
}
}
}
button {
text 'Reset Activities'
command do
@person.reset_activities!
end
}
}.open
end
end
HelloCheckbutton.new.launch
```
Run with [glimmer-dsl-tk](https://rubygems.org/gems/glimmer-dsl-tk) gem installed:
```
ruby -r glimmer-dsl-tk -e "require 'samples/hello/hello_checkbutton'"
```
Alternatively, run from cloned project without [glimmer-dsl-tk](https://rubygems.org/gems/glimmer-dsl-tk) gem installed:
```
ruby -r ./lib/glimmer-dsl-tk.rb samples/hello/hello_checkbutton.rb
```
Glimmer app:
### Hello, Radiobutton!
Glimmer code (from [samples/hello/hello_radiobutton.rb](samples/hello/hello_radiobutton.rb)):
```ruby
require 'glimmer-dsl-tk'
class HelloRadiobutton
class Person
attr_accessor :male, :female, :child, :teen, :adult, :senior
def initialize
reset!
end
def reset!
self.male = true
self.female = nil
self.child = nil
self.teen = nil
self.adult = true
self.senior = nil
end
end
include Glimmer
def initialize
@person = Person.new
end
def launch
root {
title 'Hello, Radio!'
background '#ececec' if OS.mac?
label {
text 'Gender:'
font 'caption'
}
frame {
radiobutton {
text 'Male'
variable <=> [@person, :male]
}
radiobutton {
text 'Female'
variable <=> [@person, :female]
}
}
label {
text 'Age Group:'
font 'caption'
}
frame {
radiobutton {
text 'Child'
variable <=> [@person, :child]
}
radiobutton {
text 'Teen'
variable <=> [@person, :teen]
}
radiobutton {
text 'Adult'
variable <=> [@person, :adult]
}
radiobutton {
text 'Senior'
variable <=> [@person, :senior]
}
}
button {
text 'Reset'
command do
@person.reset!
end
}
}.open
end
end
HelloRadiobutton.new.launch
```
Run with [glimmer-dsl-tk](https://rubygems.org/gems/glimmer-dsl-tk) gem installed:
```
ruby -r glimmer-dsl-tk -e "require 'samples/hello/hello_radiobutton'"
```
Alternatively, run from cloned project without [glimmer-dsl-tk](https://rubygems.org/gems/glimmer-dsl-tk) gem installed:
```
ruby -r ./lib/glimmer-dsl-tk.rb samples/hello/hello_radiobutton.rb
```
Glimmer app:
### Hello, Frame!
Glimmer code (from [samples/hello/hello_frame.rb](samples/hello/hello_frame.rb)):
```ruby
require 'glimmer-dsl-tk'
class HelloFrame
include Glimmer
def launch
root {
title 'Hello, Frame!'
frame { # frame simply contains widgets for visual organization via a layout
relief 'sunken'
label {
grid row: 0, column: 0, columnspan: 4, padx: 5, pady: 5
text 'Enter Your Full Name'
font 'caption'
anchor 'center'
}
label {
grid row: 1, column: 0, padx: 5
text "First Name:"
}
entry {
grid row: 1, column: 1, padx: 5
}
label {
grid row: 2, column: 0, padx: 5
text "Last Name:"
}
entry {
grid row: 2, column: 1, padx: 5
}
}
frame { # an empty frame can specify width and height
grid padx: 7, pady: 7
width 200
height 100
borderwidth 3
relief 'sunken'
}
}.open
end
end
HelloFrame.new.launch
```
Run with [glimmer-dsl-tk](https://rubygems.org/gems/glimmer-dsl-tk) gem installed:
```
ruby -r glimmer-dsl-tk -e "require 'samples/hello/hello_frame'"
```
Alternatively, run from cloned project without [glimmer-dsl-tk](https://rubygems.org/gems/glimmer-dsl-tk) gem installed:
```
ruby -r ./lib/glimmer-dsl-tk.rb samples/hello/hello_frame.rb
```
Glimmer app:
### Hello, Root!
Glimmer code (from [samples/hello/hello_frame.rb](samples/hello/hello_frame.rb)):
```ruby
require 'glimmer-dsl-tk'
include Glimmer
root { |r|
title 'Hello, Root!'
iconphoto File.expand_path('../../icons/glimmer.png', __dir__)
width 400
height 200
x -150
y 300
resizable true # same as `resizable true, true`, meaning cannot resize horizontally and vertically
minsize 200, 100
maxsize 600, 400
background 'lightgrey'
alpha 0.85 # on the mac, you can set `transparent true` as well
topmost true
on('OPEN_WINDOW') do # custom event that runs right after Tk.mainloop
message_box(parent: r, title: 'Hi', message: 'Hi')
end
on('DELETE_WINDOW') do |event| # alias for WM_DELETE_WINDOW protocol event
message_box(parent: r, title: 'Bye', message: 'Bye')
exit(0)
end
}.open
```
Run with [glimmer-dsl-tk](https://rubygems.org/gems/glimmer-dsl-tk) gem installed:
```
ruby -r glimmer-dsl-tk -e "require 'samples/hello/hello_root'"
```
Alternatively, run from cloned project without [glimmer-dsl-tk](https://rubygems.org/gems/glimmer-dsl-tk) gem installed:
```
ruby -r ./lib/glimmer-dsl-tk.rb samples/hello/hello_root.rb
```
Glimmer app:
### Hello, Notebook!
Glimmer code (from [samples/hello/hello_notebook.rb](samples/hello/hello_notebook.rb)):
```ruby
require 'glimmer-dsl-tk'
class HelloNotebook
include Glimmer
def launch
root {
title 'Hello, Notebook!'
notebook {
frame(text: 'English') {
label {
text 'Hello, World!'
}
}
frame(text: 'French') {
label {
text 'Bonjour, Univers!'
}
}
}
}.open
end
end
HelloNotebook.new.launch
```
Run with [glimmer-dsl-tk](https://rubygems.org/gems/glimmer-dsl-tk) gem installed:
```
ruby -r glimmer-dsl-tk -e "require 'samples/hello/hello_notebook'"
```
Alternatively, run from cloned project without [glimmer-dsl-tk](https://rubygems.org/gems/glimmer-dsl-tk) gem installed:
```
ruby -r ./lib/glimmer-dsl-tk.rb samples/hello/hello_notebook.rb
```
Glimmer app:
### Hello, Label!
Icons used in this sample were made by Freepik from www.flaticon.com
Glimmer code (from [samples/hello/hello_label.rb](samples/hello/hello_label.rb)):
```ruby
require 'glimmer-dsl-tk'
class HelloLabel
include Glimmer
LABEL_FONTS = ['default', 'text', 'fixed', 'menu', 'heading', 'caption', 'small_caption', 'icon', 'tooltip']
LABEL_RELIEFS = ['flat', 'raised', 'sunken', 'solid', 'ridge', 'groove']
def launch
root {
title 'Hello, Label!'
notebook {
frame(text: 'left-aligned') {
3.times do |n|
label {
text "Field #{n + 1} / default font / flat relief"
width 60
anchor 'w'
}
end
}
frame(text: 'centered') {
9.times do |n|
label {
text "Field #{n + 1} / fixed font / raised relief"
width 80
anchor 'center'
font 'fixed'
relief 'raised'
}
end
}
frame(text: 'right-aligned') {
9.times do |n|
label {
text "Field #{n + 1} / small_caption font / ridge relief"
width 80
anchor 'e'
font 'small_caption'
relief 'ridge'
}
end
}
frame(text: 'justified') {
label {
text <<~MULTI_LINE_STRING
This is a very long paragraph that spans multiple lines. It looks better and
is easier to read when justified. In fact, this is how to make it look like a
new paper column. That results in professional looking text. Magazines use the
same sort of justified text. Word processors also support justified text. In
fact, this is how text is made for news papers and magainzes, and then published
in paper form and digitally.
MULTI_LINE_STRING
width 60
anchor 'center'
justify 'center' # other options are: 'left' and 'right'
font 'caption' # other options are: 'default', 'text', 'fixed', 'menu', 'heading', 'small_caption', 'icon', 'tooltip'
foreground 'blue'
relief 'sunken' # other options are: 'flat' (default), 'raised', 'solid', 'ridge', 'groove'
}
}
frame(text: 'images') {
['denmark', 'finland', 'norway'].each do |image_name|
label {
image File.expand_path("images/#{image_name}.png", __dir__)
}
end
}
frame(text: 'background images') {
['italy', 'france', 'mexico'].each do |image_name|
label {
text image_name.capitalize
image File.expand_path("images/#{image_name}.png", __dir__)
compound 'center'
}
end
}
}
}.open
end
end
HelloLabel.new.launch
```
Run with [glimmer-dsl-tk](https://rubygems.org/gems/glimmer-dsl-tk) gem installed:
```
ruby -r glimmer-dsl-tk -e "require 'samples/hello/hello_label'"
```
Alternatively, run from cloned project without [glimmer-dsl-tk](https://rubygems.org/gems/glimmer-dsl-tk) gem installed:
```
ruby -r ./lib/glimmer-dsl-tk.rb samples/hello/hello_label.rb
```
Glimmer app:
### Hello, Message Box!
Glimmer code (from [samples/hello/hello_message_box.rb](samples/hello/hello_message_box.rb)):
```ruby
root { |r|
title 'Hello, Message Box!'
frame {
button {
text 'Please Click To Win a Surprise'
command {
# specifying parent ensures dialog shows up centered on top of window (instead of centered in display monitor)
@result_label.text = message_box(parent: r, title: 'Surprise', message: "Congratulations!\n\nYou won $1,000,000!") # type: 'ok' by default
}
}
button {
text 'Download Software Update'
command {
@result_label.text = message_box(type: 'okcancel', title: 'Software Update', message: "We will begin to download software update.")
}
}
button {
text 'Format Hard Drive'
command {
@result_label.text = message_box(type: 'yesno', icon: 'question', title: 'Format', message: "Would you like to format your hard drive?")
}
}
button {
text 'Submit Application'
command {
@result_label.text = message_box(type: 'yesnocancel', icon: 'question', title: 'Application', message: "Would you like to review application before submitting?")
}
}
button {
text 'Play Video'
command {
@result_label.text = message_box(type: 'retrycancel', icon: 'error', title: 'Video Replay', message: "Video has failed to play. Would you like to retry?")
}
}
button {
text 'Installation Completed'
command {
@result_label.text = message_box(type: 'abortretryignore', icon: 'warning', default: 'ignore', title: 'Failed To Install Extra Utilities', message: "Installation is complete, but extra utilities have failed to install. Would you like to retry installing extra utilities?", detail: 'Encountered network error in downloading extra utilities, resulting in failure to install them')
}
}
}
frame {
label {
grid row: 0, column: 0
text 'Result:'
}
@result_label = label {
grid row: 0, column: 1
}
}
}.open
```
Run with [glimmer-dsl-tk](https://rubygems.org/gems/glimmer-dsl-tk) gem installed:
```
ruby -r glimmer-dsl-tk -e "require 'samples/hello/hello_message_box'"
```
Alternatively, run from cloned project without [glimmer-dsl-tk](https://rubygems.org/gems/glimmer-dsl-tk) gem installed:
```
ruby -r ./lib/glimmer-dsl-tk.rb samples/hello/hello_message_box.rb
```
Glimmer app:
### Hello, Combobox!
Glimmer code (from [samples/hello/hello_combobox.rb](samples/hello/hello_combobox.rb)):
```ruby
# ... more code precedes
root {
title 'Hello, Combobox!'
combobox {
readonly true # this applies to text editing only (item selection still triggers a write to model)
text <=> [person, :country]
}
button {
text "Reset Selection"
command {
person.reset_country
}
}
}.open
# ... more code follows
```
Run with [glimmer-dsl-tk](https://rubygems.org/gems/glimmer-dsl-tk) gem installed:
```
ruby -r glimmer-dsl-tk -e "require 'samples/hello/hello_combobox'"
```
Alternatively, run from cloned project without [glimmer-dsl-tk](https://rubygems.org/gems/glimmer-dsl-tk) gem installed:
```
ruby -r ./lib/glimmer-dsl-tk.rb samples/hello/hello_combobox.rb
```
Glimmer app:
### Hello, List Single Selection!
Glimmer code (from [samples/hello/hello_list_single_selection.rb](samples/hello/hello_list_single_selection.rb)):
```ruby
# ... more code precedes
root {
title 'Hello, List Single Selection!'
list {
selectmode 'browse'
selection <=> [person, :country]
}
button {
text "Reset Selection To Default Value"
command { person.reset_country }
}
}.open
# ... more code follows
```
Run with [glimmer-dsl-tk](https://rubygems.org/gems/glimmer-dsl-tk) gem installed:
```
ruby -r glimmer-dsl-tk -e "require 'samples/hello/hello_list_single_selection'"
```
Alternatively, run from cloned project without [glimmer-dsl-tk](https://rubygems.org/gems/glimmer-dsl-tk) gem installed:
```
ruby -r ./lib/glimmer-dsl-tk.rb samples/hello/hello_list_single_selection.rb
```
Glimmer app:
### Hello, List Multi Selection!
Glimmer code (from [samples/hello/hello_list_multi_selection.rb](samples/hello/hello_list_multi_selection.rb)):
```ruby
# ... more code precedes
root {
title 'Hello, List Multi Selection!'
list {
selection <=> [person, :provinces]
}
button {
text "Reset Selection To Defaults"
command { person.reset_provinces }
}
}.open
# ... more code follows
```
Run with [glimmer-dsl-tk](https://rubygems.org/gems/glimmer-dsl-tk) gem installed:
```
ruby -r glimmer-dsl-tk -e "require 'samples/hello/hello_list_multi_selection'"
```
Alternatively, run from cloned project without [glimmer-dsl-tk](https://rubygems.org/gems/glimmer-dsl-tk) gem installed:
```
ruby -r ./lib/glimmer-dsl-tk.rb samples/hello/hello_list_multi_selection.rb
```
Glimmer app:
### Hello, Entry!
Glimmer code (from [samples/hello/hello_entry.rb](samples/hello/hello_entry.rb)):
```ruby
require 'glimmer-dsl-tk'
class HelloEntry
include Glimmer
attr_accessor :default, :password, :telephone, :read_only
def initialize
self.default = 'default'
self.password = 'password'
self.telephone = '555-555-5555'
self.read_only = 'Telephone area code is 555'
end
def launch
root {
title 'Hello, Entry!'
label {
grid sticky: 'ew'
text 'default entry'
}
entry {
grid sticky: 'ew'
text <=> [self, :default]
}
label {
grid sticky: 'ew'
text 'password entry'
}
entry {
grid sticky: 'ew'
show '*'
text <=> [self, :password]
}
@validated_entry_label = label {
grid sticky: 'ew'
text 'entry with event handlers'
}
entry {
grid sticky: 'ew'
text <=> [self, :telephone]
validate 'key'
## this event kicks in just after the user typed and before modifying the text variable
on('validate') do |new_text_variable|
telephone?(new_text_variable.value)
end
## this event kicks in just after the text variable is validated and before it is modified
on('invalid') do |validate_args|
@validated_entry_label.text = "#{validate_args.string} is not valid!"
@validated_entry_label.foreground = 'red'
end
## this event kicks in just after the text variable is validated and modified
on('change') do |new_text_variable|
self.read_only = "Telephone area code is #{new_text_variable.value.gsub(/[^0-9]/, '')[0...3]}"
@validated_entry_label.text = 'entry with event handlers'
@validated_entry_label.foreground = nil
end
}
label {
grid sticky: 'ew'
text 'read-only entry'
}
entry {
grid sticky: 'ew'
text <=> [self, :read_only]
readonly true
}
}.open
end
def telephone?(text)
!!text.match(/^\d{0,3}[-.\/]?\d{0,3}[-.\/]?\d{0,4}$/)
end
end
HelloEntry.new.launch
```
Run with [glimmer-dsl-tk](https://rubygems.org/gems/glimmer-dsl-tk) gem installed:
```
ruby -r glimmer-dsl-tk -e "require 'samples/hello/hello_entry'"
```
Alternatively, run from cloned project without [glimmer-dsl-tk](https://rubygems.org/gems/glimmer-dsl-tk) gem installed:
```
ruby -r ./lib/glimmer-dsl-tk.rb samples/hello/hello_entry.rb
```
Glimmer app:
### Hello, Text!
You may use the META+F shortcut to bring up the Find Dialog.
Icons used in this sample were made by Freepik from www.flaticon.com
Glimmer code (from [samples/hello/hello_text.rb](samples/hello/hello_text.rb)):
```ruby
require 'glimmer-dsl-tk'
class HelloText
include Glimmer
COLOR_OPTIONS = %w[black purple blue green orange yellow red white].map(&:capitalize)
FONT_FAMILY_OPTIONS = ::TkFont.families
FOREGROUND_PROMPT = ''
BACKGROUND_PROMPT = ''
FONT_FAMILY_PROMPT = ''
FONT_SIZE_PROMPT = ''
def initialize
@foreground = FOREGROUND_PROMPT
@background = BACKGROUND_PROMPT
@font_family = FONT_FAMILY_PROMPT
@font_size = FONT_SIZE_PROMPT
@document = <<~MULTI_LINE_STRING
According to the National Post, a heavy metal-loving high school principal in Canada will be allowed to keep her job, days after a public campaign to oust her made headlines around the globe.
Parents at Eden High School in St. Catharines, Ontario launched a petition to remove principal Sharon Burns after discovering she's an IRON MAIDEN fan.
The petition, titled "Eden High School Principal, Sharon Burns, Needs to Be Transferred Immediately!" read, "We are deeply disturbed that the principal assigned to the school blatantly showed Satanic symbols and her allegiance to Satanic practices on her public social media platforms where all the students can see them under @edenprincipal (not her personal account)."
More than 500 people signed the petition to transfer Burns after she posted a picture of herself flashing the "devil horns" hand sign with a doll of the MAIDEN zombie mascot Eddie behind her as well as a personalized license plate reading "IRNMADEN" and a handwritten note that reads "Eddie 666" on a car's dashboard.
The number 666 is used to represent the devil, and is featured prominently in MAIDEN's artwork by the band, whose classic third album is titled "The Number Of The Beast".
The petition was later updated to state that the demand for her transfer is not because of her love for metal, but for "openly displaying her own handmade sign with the 666 clearly displayed on it".
The creator of the original petition wrote: "Sharon knows full well what she did was simply inappropriate, unnecessary and not professional but has yet to publicly admit so and is willing to allow people to believe a completely different story, making very real concerns seem petty."
Meanwhile, a counter-petition supporting Burns garnered over 20,000 signatures.
"It is ridiculous that a couple of parents judge her role as a principal only based on an Instagram post. (About liking the band IRON MAIDEN. That's it.) Eden High School is a public school. Not a Christian school," the petition titled "We need Mrs Burns" stated. "She has made Eden a safe space for so many people. She spreads nothing but love and kindness."
After the complaints were aired, the District School Board of Niagara spoke with Burns and the parents who launched the petition, and the issue is over as far as the board is concerned, Kim Sweeney, the board's chief communications officer, told the National Post. No disciplinary action or policy changes were needed.
"Our belief is that taste in music is subjective and we support that both students and staff enjoy a wide variety of genres," Sweeney said.
The original petition has since been removed.
MULTI_LINE_STRING
end
attr_accessor :document
attr_accessor :foreground
def foreground_options
[FOREGROUND_PROMPT] + COLOR_OPTIONS
end
attr_accessor :background
def background_options
[BACKGROUND_PROMPT] + COLOR_OPTIONS
end
attr_accessor :font_family
def font_family_options
[FONT_FAMILY_PROMPT] + FONT_FAMILY_OPTIONS
end
attr_accessor :font_size
def font_size_options
[FONT_SIZE_PROMPT] + (9..64).to_a.map(&:to_s)
end
def launch
root {
title 'Hello, Text!'
width 1280
height 800
frame {
grid row: 0, column: 0
label {
grid row: 0, column: 0, columnspan: 17
text 'Select a region of text and then apply formatting from the toolbar'
}
column_index = -1
combobox {
grid row: 1, column: column_index += 1, column_weight: 1
readonly true
text <=> [self, :font_family, after_write: ->(value) { @text.toggle_selection_font_format('family', value == FONT_FAMILY_PROMPT ? 'Courier New' : value) }]
}
combobox {
grid row: 1, column: column_index += 1, column_weight: 1
readonly true
text <=> [self, :font_size, after_write: ->(value) { @text.toggle_selection_font_format('size', value == FONT_SIZE_PROMPT ? 13 : value) }]
}
combobox {
grid row: 1, column: column_index += 1, column_weight: 1
readonly true
text <=> [self, :foreground, after_write: ->(value) { @text.add_selection_format('foreground', value == FOREGROUND_PROMPT ? 'black' : value) }]
}
combobox {
grid row: 1, column: column_index += 1, column_weight: 1
readonly true
text <=> [self, :background, after_write: ->(value) { @text.add_selection_format('background', value == BACKGROUND_PROMPT ? 'white' : value) }]
}
separator {
grid row: 1, column: column_index += 1, column_weight: 0
orient 'vertical'
}
button {
grid row: 1, column: column_index += 1, column_weight: 0
text 'B'
style font: {weight: 'bold'}
on('command') do
@text.toggle_selection_font_format('weight', 'bold')
end
}
button {
grid row: 1, column: column_index += 1, column_weight: 0
text 'I'
style font: {slant: 'italic'}
on('command') do
@text.toggle_selection_font_format('slant', 'italic')
end
}
button {
grid row: 1, column: column_index += 1, column_weight: 0
text 'U'
style font: {underline: true}
on('command') do
@text.toggle_selection_font_format('underline', true)
end
}
separator {
grid row: 1, column: column_index += 1, column_weight: 0
orient 'vertical'
}
button {
grid row: 1, column: column_index += 1, column_weight: 0
image File.expand_path("images/cut.png", __dir__), subsample: 32
on('command') do
@text.text_cut
end
}
button {
grid row: 1, column: column_index += 1, column_weight: 0
image File.expand_path("images/copy.png", __dir__), subsample: 32
on('command') do
@text.text_copy
end
}
button {
grid row: 1, column: column_index += 1, column_weight: 0
image File.expand_path("images/paste.png", __dir__), subsample: 32
on('command') do
@text.text_paste
end
}
separator {
grid row: 1, column: column_index += 1, column_weight: 0
orient 'vertical'
}
button {
grid row: 1, column: column_index += 1, column_weight: 0
image File.expand_path("images/align-left.png", __dir__), subsample: 32
on('command') do
@text.add_selection_format('justify', 'left')
end
}
button {
grid row: 1, column: column_index += 1, column_weight: 0
image File.expand_path("images/align-center.png", __dir__), subsample: 32
on('command') do
@text.add_selection_format('justify', 'center')
end
}
button {
grid row: 1, column: column_index += 1, column_weight: 0
image File.expand_path("images/align-right.png", __dir__), subsample: 32
on('command') do
@text.add_selection_format('justify', 'right')
end
}
separator {
grid row: 1, column: column_index += 1, column_weight: 0
orient 'vertical'
}
button {
grid row: 1, column: column_index += 1, column_weight: 0
image File.expand_path("images/undo.png", __dir__), subsample: 32
on('command') do
@text.edit_undo
end
}
button {
grid row: 1, column: column_index += 1, column_weight: 0
image File.expand_path("images/redo.png", __dir__), subsample: 32
on('command') do
@text.edit_redo
end
}
separator {
grid row: 1, column: column_index += 1, column_weight: 0
orient 'vertical'
}
button {
grid row: 1, column: column_index += 1, column_weight: 0
image File.expand_path("images/picture.png", __dir__), subsample: 32
on('command') do
@text.get_open_file_to_insert_image
end
}
}
@text = text {
grid row: 1, column: 0, row_weight: 1
wrap 'word'
undo true
value <=> [self, :document]
}
}.open
end
end
HelloText.new.launch
```
Run with [glimmer-dsl-tk](https://rubygems.org/gems/glimmer-dsl-tk) gem installed:
```
ruby -r glimmer-dsl-tk -e "require 'samples/hello/hello_text'"
```
Alternatively, run from cloned project without [glimmer-dsl-tk](https://rubygems.org/gems/glimmer-dsl-tk) gem installed:
```
ruby -r ./lib/glimmer-dsl-tk.rb samples/hello/hello_text.rb
```
Glimmer app:
### Hello, Spinbox!
Glimmer code (from [samples/hello/hello_spinbox.rb](samples/hello/hello_spinbox.rb)):
```ruby
require 'glimmer-dsl-tk'
class HelloSpinbox
class Person
attr_accessor :donation
end
include Glimmer
def initialize
@person = Person.new
@person.donation = 5.0 # in dollars
end
def launch
root {
title 'Hello, Spinbox!'
label {
text 'Please select the amount you would like to donate to the poor:'
}
frame {
label {
grid row: 0, column: 0
text 'Amount:'
font 'caption'
}
label {
grid row: 0, column: 1
text '$'
}
spinbox { |sb|
grid row: 0, column: 2
from 1.0 # minimum value
to 150.0 # maximum value
increment 5.0 # increment on up and down
format '%0.2f'
text <=> [@person, :donation]
}
label {
grid row: 1, column: 0, columnspan: 3
text <=> [@person, :donation, on_read: ->(value) { "Thank you for your donation of $#{"%.2f" % value.to_f}"}]
}
}
}.open
end
end
HelloSpinbox.new.launch
```
Run with [glimmer-dsl-tk](https://rubygems.org/gems/glimmer-dsl-tk) gem installed:
```
ruby -r glimmer-dsl-tk -e "require 'samples/hello/hello_spinbox'"
```
Alternatively, run from cloned project without [glimmer-dsl-tk](https://rubygems.org/gems/glimmer-dsl-tk) gem installed:
```
ruby -r ./lib/glimmer-dsl-tk.rb samples/hello/hello_spinbox.rb
```
Glimmer app:
### Hello, Computed!
Glimmer code (from [samples/hello/hello_computed.rb](samples/hello/hello_computed.rb)):
```ruby
# ... more code precedes
root {
title 'Hello, Computed!'
frame {
grid column: 0, row: 0, padx: 5, pady: 5
label {
grid column: 0, row: 0, sticky: 'w'
text 'First Name: '
}
entry {
grid column: 1, row: 0
width 15
text <=> [@contact, :first_name]
}
label {
grid column: 0, row: 1, sticky: 'w'
text 'Last Name: '
}
entry {
grid column: 1, row: 1
width 15
text <=> [@contact, :last_name]
}
label {
grid column: 0, row: 2, sticky: 'w'
text 'Year of Birth: '
}
entry {
grid column: 1, row: 2
width 15
text <=> [@contact, :year_of_birth]
}
label {
grid column: 0, row: 3, sticky: 'w'
text 'Name: '
}
label {
grid column: 1, row: 3, sticky: 'w'
text <=> [@contact, :name, computed_by: [:first_name, :last_name]]
}
label {
grid column: 0, row: 4, sticky: 'w'
text 'Age: '
}
label {
grid column: 1, row: 4, sticky: 'w'
text <=> [@contact, :age, on_write: :to_i, computed_by: [:year_of_birth]]
}
}
}.open
# ... more code follows
```
Run with [glimmer-dsl-tk](https://rubygems.org/gems/glimmer-dsl-tk) gem installed:
```
ruby -r glimmer-dsl-tk -e "require 'samples/hello/hello_computed'"
```
Alternatively, run from cloned project without [glimmer-dsl-tk](https://rubygems.org/gems/glimmer-dsl-tk) gem installed:
```
ruby -r ./lib/glimmer-dsl-tk.rb samples/hello/hello_computed.rb
```
Glimmer app:
### Hello, Drag and Drop!
Glimmer code (from [samples/hello/hello_drag_and_drop.rb](samples/hello/hello_drag_and_drop.rb)):
```ruby
require "glimmer-dsl-tk"
require "glimmer/tk/drag_and_drop_extension"
include Glimmer
root {
title "Hello, Drag and Drop!"
frame {
padding 5
labelframe {
text "Drag sources"
padding 5
label {
text "Entry"
grid :row => 0, :column => 0
}
entry {
text "Drag entry text"
width 30
grid :row => 0, :column => 1, :pady => 5, :sticky => "e"
on_drag_start { |event|
event.data = event.source.textvariable&.value
event.source.configure(:cursor => "hand2")
TkLabel.new(event.tooltip) {
text event.data + " "
bg "yellow"
bitmap "warning"
compound "right"
}.pack
}
on_drag_motion { |event|
if event.drop_accepted
event.source.configure(:cursor => "hand1")
else
event.source.configure(:cursor => "hand2")
end
event.tooltip.geometry("+#{event.x_root + 10}+#{event.y_root - 4}")
}
}
label {
text "Label"
grid :row => 1, :column => 0
}
label {
text "Drag label text"
width 30
grid :row => 1, :column => 1, :pady => 10, :sticky => "e"
drag_source true
}
label {
text "Combobox"
grid :row => 2, :column => 0
}
combobox {
text "Spain"
values %w[USA Canada Mexico Columbia UK Australia Germany Italy Spain]
width 27
grid :row => 2, :column => 1, :pady => 5, :sticky => "e"
on_drag_start { |event|
event.data = event.source.textvariable&.value
}
}
label {
text "Button"
grid :row => 3, :column => 0
}
button {
text "Drag it"
grid :row => 3, :column => 1, :pady => 5, :sticky => "w"
drag_source true
}
}
labelframe {
text "Drop targets"
grid :sticky => "nsew", :pady => 15
padding 5
label {
text "Entry"
grid :row => 0, :column => 0
}
entry {
width 30
grid :row => 0, :column => 1, :pady => 5, :sticky => "e"
on_drop { |event|
event.target.textvariable.value = event.data
}
}
label {
text "Label"
grid :row => 1, :column => 0
}
label {
width 30
grid :row => 1, :column => 1, :pady => 10, :sticky => "e"
borderwidth 2
relief "solid"
on_drop { |event|
event.target.textvariable.value = event.data
}
}
label {
text "Combobox"
grid :row => 2, :column => 0
}
combobox {
width 27
grid :row => 2, :column => 1, :pady => 5, :sticky => "e"
on_drop { |event|
event.target.textvariable.value = event.data
}
}
label {
text "Button"
grid :row => 3, :column => 0
}
button {
text "Drop here"
grid :row => 3, :column => 1, :pady => 5, :sticky => "w"
on_drop { |event|
event.target.text = event.data
}
}
label {
text "Checkbutton"
grid :row => 4, :column => 0
}
checkbutton {
text "Drop here to destroy a widget\n(except button)"
grid :row => 4, :column => 1, :pady => 5, :sticky => "w"
on_drop { |event|
event.target.text = event.data
event.source.destroy unless event.source.is_a? Tk::Button
}
}
}
}
}.open
```
Run with [glimmer-dsl-tk](https://rubygems.org/gems/glimmer-dsl-tk) gem installed:
```
ruby -r glimmer-dsl-tk -e "require 'samples/hello/hello_drag_and_drop'"
```
Alternatively, run from cloned project without [glimmer-dsl-tk](https://rubygems.org/gems/glimmer-dsl-tk) gem installed:
```
ruby -r ./lib/glimmer-dsl-tk.rb samples/hello/hello_drag_and_drop.rb
```
Glimmer app:
### Hello, Built-in Dialog!
Glimmer code (from [samples/hello/hello_built_in_dialog.rb](samples/hello/hello_built_in_dialog.rb)):
```ruby
require 'glimmer-dsl-tk'
include Glimmer
root { |w|
title 'Hello, Built-in Dialog!'
width 400
height 400
x 150
y 150
frame {
%w[get_open_file get_multiple_open_file get_save_file choose_directory choose_color].each do |dialog|
button {
text dialog.split('_').map(&:capitalize).join(' ')
on('command') do
result = send(dialog, parent: w)
@result_label.text = [result].flatten.join("\n")
end
}
end
button {
text 'Choose Font'
on('command') do
choose_font(family: 'Courier New', size: '30', weight: 'bold') do |chosen_font|
@result_label.text = chosen_font
end
end
}
}
frame {
grid sticky: 'nsew', padx: 15, pady: 15
label {
grid row: 0, column: 0
text 'Result:'
}
@result_label = label {
grid row: 0, column: 1
}
}
}.open
```
Run with [glimmer-dsl-tk](https://rubygems.org/gems/glimmer-dsl-tk) gem installed:
```
ruby -r glimmer-dsl-tk -e "require 'samples/hello/hello_built_in_dialog'"
```
Alternatively, run from cloned project without [glimmer-dsl-tk](https://rubygems.org/gems/glimmer-dsl-tk) gem installed:
```
ruby -r ./lib/glimmer-dsl-tk.rb samples/hello/hello_built_in_dialog.rb
```
Glimmer app:
### Hello, Separator!
Glimmer code (from [samples/hello/hello_separator.rb](samples/hello/hello_separator.rb)):
```ruby
require 'glimmer-dsl-tk'
include Glimmer
root {
title 'Hello, Separator!'
width 200
height 200
label {
grid row: 0, column: 0, min_width: 100, min_height: 100, column_weight: 0, sticky: 'nsew'
text 'Label 1'
anchor 'center'
}
separator {
grid row: 0, column: 1
orient 'vertical'
}
label {
grid row: 0, column: 2, min_width: 100, min_height: 100, sticky: 'nsew'
text 'Label 2'
anchor 'center'
}
separator {
grid row: 1, column: 0, column_span: 3
# orient 'horizontal' # default
}
label {
grid row: 2, column: 0, min_width: 100, min_height: 100, sticky: 'nsew'
text 'Label 3'
anchor 'center'
}
separator {
grid row: 2, column: 1
orient 'vertical'
}
label {
grid row: 2, column: 2, min_width: 100, min_height: 100, sticky: 'nsew'
text 'Label 4'
anchor 'center'
}
}.open
```
Run with [glimmer-dsl-tk](https://rubygems.org/gems/glimmer-dsl-tk) gem installed:
```
ruby -r glimmer-dsl-tk -e "require 'samples/hello/hello_separator'"
```
Alternatively, run from cloned project without [glimmer-dsl-tk](https://rubygems.org/gems/glimmer-dsl-tk) gem installed:
```
ruby -r ./lib/glimmer-dsl-tk.rb samples/hello/hello_separator.rb
```
Glimmer app:
## Applications
### Glimmer Tk Calculator
"I wanted to try how it feels to write an UI in glimmer-dsl-tk so I decided to write an alternative version of the [Glimmer Calculator](https://github.com/AndyObtiva/glimmer-cs-calculator) that uses [Tk]([Tk](https://www.tcl.tk/)) and runs in the regular [MRI Ruby interpreter](https://www.ruby-lang.org/en/)." - [Ancor Gonzalez Sosa](https://github.com/ancorgs)
https://github.com/ancorgs/glimmer-tk-calculator
### Y3network Ruby UI
https://github.com/ancorgs/y3network-ruby-ui
### CryptoPunks GUI
This is a Graphical User Interface for the famous [cryptopunks Ruby gem](https://github.com/cryptopunksnotdead/cryptopunks/tree/master/cryptopunks).
https://github.com/AndyObtiva/cryptopunks-gui
## Process
[Glimmer Process](https://github.com/AndyObtiva/glimmer/blob/master/PROCESS.md)
## Resources
- [Tk Tutorial](https://tkdocs.com/tutorial/index.html)
- [Code Master Blog](https://andymaleh.blogspot.com/search/label/Tk)
## Help
### Issues
If you encounter [issues](https://github.com/AndyObtiva/glimmer-dsl-tk/issues) that are not reported, discover missing features that are not mentioned in [TODO.md](TODO.md), or think up better ways to use [Tk](https://www.tcl.tk/) than what is possible with [Glimmer DSL for Tk](https://rubygems.org/gems/glimmer-dsl-tk), you may submit an [issue](https://github.com/AndyObtiva/glimmer-dsl-tk/issues/new) or [pull request](https://github.com/AndyObtiva/glimmer-dsl-tk/compare) on [GitHub](https://github.com).
### Chat
If you need live help, try to [](https://gitter.im/AndyObtiva/glimmer?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
## Planned Features and Feature Suggestions
These features have been planned or suggested. You might see them in a future version of [Glimmer DSL for Tk](https://rubygems.org/gems/glimmer-dsl-tk). You are welcome to contribute more feature suggestions.
[TODO.md](TODO.md)
## Change Log
[CHANGELOG.md](CHANGELOG.md)
## Contributing
[CONTRIBUTING.md](CONTRIBUTING.md)
## Contributors
* [Andy Maleh](https://github.com/AndyObtiva) (Founder)
* [vin1antme](https://github.com/vin1antme)
[Click here to view contributor commits.](https://github.com/AndyObtiva/glimmer-dsl-tk/graphs/contributors)
## License
[MIT](LICENSE.txt)
Copyright (c) 2020-2021 - Andy Maleh.
--
[](https://github.com/AndyObtiva/glimmer) Built for [Glimmer](https://github.com/AndyObtiva/glimmer) (DSL Framework).