1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
|
/* Color Selector
*
* GtkColorSelection lets the user choose a color. GtkColorSelectionDialog is
* a prebuilt dialog containing a GtkColorSelection.
*
*/
using System;
using Gdk;
using Gtk;
namespace GtkDemo
{
[Demo ("Color Selection", "DemoColorSelection.cs")]
public class DemoColorSelection : Gtk.Window
{
private Gdk.RGBA color;
private Gtk.DrawingArea drawingArea;
public DemoColorSelection () : base ("Color Selection")
{
BorderWidth = 8;
VBox vbox = new VBox (false,8);
vbox.BorderWidth = 8;
Add (vbox);
// Create the color swatch area
Frame frame = new Frame ();
frame.ShadowType = ShadowType.In;
vbox.PackStart (frame, true, true, 0);
drawingArea = new DrawingArea ();
// set a minimum size
drawingArea.SetSizeRequest (200,200);
// set the color
color.Red = 0;
color.Green = 0;
color.Blue = 1;
color.Alpha = 1;
drawingArea.OverrideBackgroundColor (StateFlags.Normal, color);
frame.Add (drawingArea);
Alignment alignment = new Alignment (1.0f, 0.5f, 0.0f, 0.0f);
Button button = new Button ("_Change the above color");
button.Clicked += new EventHandler (ChangeColorCallback);
alignment.Add (button);
vbox.PackStart (alignment, false, false, 0);
ShowAll ();
}
protected override bool OnDeleteEvent (Gdk.Event evt)
{
Destroy ();
return true;
}
private void ChangeColorCallback (object o, EventArgs args)
{
using (ColorSelectionDialog colorSelectionDialog = new ColorSelectionDialog ("Changing color")) {
colorSelectionDialog.TransientFor = this;
colorSelectionDialog.ColorSelection.SetPreviousRgba (color);
colorSelectionDialog.ColorSelection.CurrentRgba = color;
colorSelectionDialog.ColorSelection.HasPalette = true;
if (colorSelectionDialog.Run () == (int) ResponseType.Ok) {
color = colorSelectionDialog.ColorSelection.CurrentRgba;
drawingArea.OverrideBackgroundColor (StateFlags.Normal, color);
}
colorSelectionDialog.Hide ();
}
}
}
}
|
