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# Copyright (c) 2003-2005 Ruby-GNOME2 Project Team
# This program is licenced under the same licence as Ruby-GNOME2.
#
# $Id: colorsel.rb,v 1.4 2005/02/12 23:02:43 kzys Exp $
=begin
= Color Selector
Gtk::ColorSelection lets the user choose a color. Gtk::ColorSelectionDialog
is a prebuilt dialog containing a Gtk::ColorSelection.
=end
require 'common'
module Demo
class ColorSel < BasicWindow
def initialize
super('Color Selection')
@color = Gdk::RGBA.new(0, 0, 1, 1)
set_border_width(8)
vbox = Gtk::Box.new(:vertical, 0)
vbox.set_border_width(8)
add(vbox)
## Create the color swatch area
@frame = Gtk::Frame.new
@frame.set_shadow_type(:in)
vbox.pack_start(@frame, :expand => true, :fill => true, :padding => 0)
@da = Gtk::DrawingArea.new
@da.signal_connect('draw') do |widget, event|
if widget.window
context = widget.style_context
background_color = context.get_background_color(:normal)
event.set_source_rgba(background_color.to_a)
event.paint
end
end
# set a minimum size
@da.set_size_request(200, 200)
# set the color
@da.override_background_color(:normal, @color)
@frame.add(@da)
alignment = Gtk::Alignment.new(1.0, 0.5, 0.0, 0.0)
button = Gtk::Button.new(:mnemonic => '_Change the above color')
alignment.add(button)
vbox.pack_start(alignment, :expand => false, :fill => false, :padding => 0)
button.signal_connect('clicked') do
change_color_callback
end
end
def change_color_callback
dialog = Gtk::ColorSelectionDialog.new(:title => 'Changing color')
dialog.set_transient_for(self)
colorsel = dialog.color_selection
colorsel.set_previous_rgba(@color)
colorsel.set_current_rgba(@color)
colorsel.set_has_palette(true)
response = dialog.run
if response == Gtk::ResponseType::OK
@color = colorsel.current_rgba
@da.override_background_color(:normal, @color)
end
dialog.destroy
end
end
end
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