lib/ppcurses/table_view.rb in ppcurses-0.1.0 vs lib/ppcurses/table_view.rb in ppcurses-0.1.1

@@ -1,50 +1,125 @@
+
+PPTableViewSelectionDidChangeNotification  = 'PPTableViewSelectionDidChangeNotification'
+PPTableViewSelectionIsChangingNotification = 'PPTableViewSelectionIsChangingNotification'
+PPTableViewEnterPressedNotification        = 'PPTableViewEnterPressedNotification'
+
 module PPCurses
+
+ 
+
 # Based loosely on ...
 #
 # https://developer.apple.com/library/mac/documentation/Cocoa/Reference/ApplicationKit/Classes/NSTableView_Class/index.html#//apple_ref/occ/cl/NSTableView
 #
 #
 class TableView < View
 
+ 
   attr_accessor :data_source
+  attr_reader   :selected_row
 
-
-  def selected_row
-
+  def initialize
+    super
+    origin = Point.new( 2, 2 )
+    setFrameOrigin(origin)
   end
 
+
   # A data source must implement a formal protocol
   #
   # - def number_of_rows_in_table(tableView)
   # - def object_value_for(tableView, tableColumn, rowIndex)
   #
   def data_source=(val)
     PPCurses.implements_protocol( val, %w(number_of_rows_in_table object_value_for ))
     @data_source = val
+    @selected_row = 0
+    
+    # Determine frame size from datasource data
+    height = @data_source.number_of_rows_in_table(self)
+    width = 0    
+    for i in 0..@data_source.number_of_rows_in_table(self)-1
+      x = @data_source.object_value_for(self, 0, i).length
+      if x > width then width = x end
+    end
+    
+    sz = Size.new( width, height )
+    setFrameSize( sz )
+    
   end
 
+  def display(screen)
+    
+    y = @frame.origin.y
+    x = @frame.origin.x
+    
+    for i in 0..@data_source.number_of_rows_in_table(self)-1
+      screen.setpos(y,x)
+      screen.attron(Curses::A_REVERSE) if i == selected_row
+      screen.addstr(@data_source.object_value_for(self, 0, i) )
+      screen.attroff(Curses::A_REVERSE) if i == selected_row
+      y += 1
+    end
+  end
+
+
+  #  NSTableViewSelectionDidChangeNotification
+  #  NSNotificationCentre 
+  def key_down( key )
+      
+      notary = NotificationCentre.default_centre
+      
+      if key == KEY_DOWN        
+        notary.post_notification(PPTableViewSelectionIsChangingNotification, self) 
+        @selected_row += 1
+        if @selected_row > @data_source.number_of_rows_in_table(self) - 1 then
+          @selected_row = 0
+        end
+        notary.post_notification(PPTableViewSelectionDidChangeNotification, self)        
+      end
+      
+      if key == KEY_UP
+         notary.post_notification(PPTableViewSelectionIsChangingNotification, self) 
+         @selected_row -= 1
+         if @selected_row < 0 then @selected_row = @data_source.number_of_rows_in_table(self) - 1 end
+         notary.post_notification(PPTableViewSelectionDidChangeNotification, self)
+      end
+      
+      if key == ENTER
+        notary.post_notification(PPTableViewEnterPressedNotification, self) 
+      end
+      
+      
+  end
+  
 end
 
 
-# Based loosely on ...
+# Based on ...
 #
 # https://developer.apple.com/library/mac/documentation/Cocoa/Reference/ApplicationKit/Protocols/NSTableDataSource_Protocol/index.html#//apple_ref/occ/intf/NSTableViewDataSource
 
 class SingleColumnDataSource
 
   def initialize(values)
     @values = values
   end
-
-  def number_of_rows_in_table
+  
+  # Returns the number of records managed for aTableView by the 
+  # data source object.
+  def number_of_rows_in_table( aTableView)
     @values.length
   end
-
-  def object_value_for(column, row_index)
+  
+  # Called by the table view to return the data object associated with 
+  # the specified row and column.
+  def object_value_for(aTableview, column, row_index)
     @values[row_index]
   end
 end
+
+
 
 class TableViewDataSource
 
   def TableViewDataSource.from_string_array(values)
     SingleColumnDataSource.new(values)