# Copyright (c) 2016 Ruby-GNOME2 Project Team
# This program is licenced under the same licence as Ruby-GNOME2.
#
=begin
=  Spin Button

 GtkSpinButton provides convenient ways to input data
 that can be seen as a value in a range. The examples
 here show that this does not necessarily mean numeric
 values, and it can include custom formatting.
=end
require "date"

class SpinbuttonDemo
  def initialize(main_window)
    builder = Gtk::Builder.new(:resource => "/spinbutton/spinbutton.ui")
    builder.connect_signals do |name|
      case name
      when "hex_spin_input"
        proc do |button|
          hex_spin_input(button)
        end
      when "hex_spin_output"
        proc do |button|
          hex_spin_output(button)
        end
      when "time_spin_input"
        proc do |button|
          time_spin_input(button)
        end
      when "time_spin_output"
        proc do |button|
          time_spin_output(button)
        end
      when "month_spin_input"
        proc do |button|
          month_spin_input(button)
        end
      when "month_spin_output"
        proc do |button|
          month_spin_output(button)
        end
      else
      end
    end
    @window = builder["window"]
    @window.screen = main_window.screen
    @window.title = "Spin Buttons"
    @window.resizable = false

    value_to_label = proc do |value|
      value.to_s
    end

    adj = builder["basic_adjustment"]
    basic_label = builder["basic_label"]
    adj.bind_property("value", basic_label, "label", :sync_create,
                      :transform_to => value_to_label)

    hex_adj = builder["hex_adjustment"]
    hex_label = builder["hex_label"]
    hex_adj.bind_property("value", hex_label, "label", :sync_create,
                      :transform_to => value_to_label)

    adj = builder["time_adjustment"]
    time_label = builder["time_label"]
    adj.bind_property("value", time_label, "label", :sync_create,
                      :transform_to => value_to_label)

    adj = builder["month_adjustment"]
    month_label = builder["month_label"]
    adj.bind_property("value", month_label, "label", :sync_create,
                      :transform_to => value_to_label)

  end

  def run
    if !@window.visible?
      @window.show_all
    else
      @window.destroy
    end
    @window
  end

  private

  def hex_spin_input(button)
    value = button.text.to_i(16)
    value = 0 if value < 1e-5
    value
  end

  def hex_spin_output(button)
    value = button.value
    button.text = sprintf("0x%.2X", value)
    button.text = "0x00" if value.abs < 1e-5
    true
  end

  def time_spin_input(button)
    str = button.text.split(":")
    hours = str[0].to_i
    minutes = str[1].to_i
    value = 0
    if (0..24).include?(hours) && (0..60).include?(minutes)
      value = hours * 60 + minutes
    end
    value
  end

  def time_spin_output(button)
    hours = button.value / 60.0
    minutes = (hours - hours.floor) * 60.0
    button.text = sprintf("%02.0f:%02.0f", hours.floor, (minutes + 0.5).floor)
    true
  end

  def month_spin_input(button)
    Date::MONTHNAMES.index(button.text) || 1
  end

  def month_spin_output(button)
    value = button.adjustment.value || 1
    button.text = Date::MONTHNAMES[value]
    true
  end
end