blob: a67ad63108972ed43165041d0ace96c7e72de58f (
plain)
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
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
|
/* -*- Mode: Vala; indent-tabs-mode: nil; tab-width: 4 -*-
*
* Copyright (C) 2012 Canonical Ltd
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 3 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* Authors: Michael Terry <michael.terry@canonical.com>
*/
public class FadeTracker : Object
{
public signal void done ();
public double alpha { get; set; default = 1.0; }
public Gtk.Widget widget { get; construct; }
public enum Mode
{
FADE_IN,
FADE_OUT,
}
public FadeTracker (Gtk.Widget widget)
{
Object (widget: widget);
}
public void reset (Mode mode)
{
this.mode = mode;
animate_cb (0.0);
widget.show ();
timer.reset ();
}
private AnimateTimer timer;
private Mode mode;
construct
{
timer = new AnimateTimer (AnimateTimer.ease_out_quint, AnimateTimer.INSTANT);
timer.animate.connect (animate_cb);
}
private void animate_cb (double progress)
{
if (mode == Mode.FADE_IN)
{
alpha = progress;
if (progress == 1.0)
{
done ();
}
}
else
{
alpha = 1.0 - progress;
if (progress == 1.0)
{
widget.hide (); /* finish the job */
done ();
}
}
widget.queue_draw ();
}
}
public interface Fadable : Gtk.Widget
{
protected abstract FadeTracker fade_tracker { get; protected set; }
public void fade_in ()
{
fade_tracker.reset (FadeTracker.Mode.FADE_IN);
}
public void fade_out ()
{
fade_tracker.reset (FadeTracker.Mode.FADE_OUT);
}
/* In case you want to control fade manually */
public void set_alpha (double alpha)
{
fade_tracker.alpha = alpha;
queue_draw ();
}
}
|
