This ColorButton launches a color selection dialog and prints in the terminal the RGB values of the color selected.
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from gi.repository import Gtk from gi.repository import Gdk import sys class MyWindow(Gtk.ApplicationWindow): def __init__(self, app): Gtk.Window.__init__(self, title="ColorButton", application=app) self.set_default_size(150, 50) self.set_border_width(10) # a colorbutton (which opens a dialogue window in # which we choose a color) self.button = Gtk.ColorButton() # with a default color (blue, in this instance) color = Gdk.RGBA() color.red = 0.0 color.green = 0.0 color.blue = 1.0 color.alpha = 0.5 self.button.set_rgba(color) # choosing a color in the dialogue window emits a signal self.button.connect("color-set", self.on_color_chosen) # a label label = Gtk.Label() label.set_text("Click to choose a color") # a grid to attach button and label grid = Gtk.Grid() grid.attach(self.button, 0, 0, 2, 1) grid.attach(label, 0, 1, 2, 1) self.add(grid) # if a new color is chosen, we print it as rgb(r,g,b) in the terminal def on_color_chosen(self, user_data): print("You chose the color: " + self.button.get_rgba().to_string()) class MyApplication(Gtk.Application): def __init__(self): Gtk.Application.__init__(self) def do_activate(self): win = MyWindow(self) win.show_all() def do_startup(self): Gtk.Application.do_startup(self) app = MyApplication() exit_status = app.run(sys.argv) sys.exit(exit_status)
set_color(color), where the color is defined as in the example, sets the color of the ColorButton, which by default is black. get_color() returns the color.
In line 23 the "color-set" signal is connected to the callback function on_color_chosen() using widget.connect(signal, callback function). See Signals and callbacks for a more detailed explanation.
In this sample we used the following:
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