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fade.cpp
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1/*
2 * Copyright 2009 Mehmet Ali Akmanalp <makmanalp@wpi.edu>
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU Library General Public License as
6 * published by the Free Software Foundation; either version 2, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details
13 *
14 * You should have received a copy of the GNU Library General Public
15 * License along with this program; if not, write to the
16 * Free Software Foundation, Inc.,
17 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
18 */
19
20#include "fade_p.h"
21
22#include <QRect>
23
24#include <kdebug.h>
25
26namespace Plasma
27{
28
29FadeAnimation::FadeAnimation(QObject *parent)
30 : EasingAnimation(parent),
31 m_startOpacity(0),
32 m_targetOpacity(1)
33{
34}
35
36FadeAnimation::~FadeAnimation()
37{
38}
39
40void FadeAnimation::setStartOpacity(qreal factor)
41{
42 m_startOpacity = qBound(qreal(0.0), factor, qreal(1.0));
43}
44
45qreal FadeAnimation::startOpacity() const
46{
47 return m_startOpacity;
48}
49
50void FadeAnimation::setTargetOpacity(qreal factor)
51{
52 m_targetOpacity = qBound(qreal(0.0), factor, qreal(1.0));
53}
54
55qreal FadeAnimation::targetOpacity() const
56{
57 return m_targetOpacity;
58}
59
60void FadeAnimation::updateState(QAbstractAnimation::State newState, QAbstractAnimation::State oldState)
61{
62 QGraphicsWidget *w = targetWidget();
63 if (!w) {
64 return;
65 }
66
67 if (oldState == Stopped && newState == Running) {
68 w->setOpacity(direction() == Forward ? m_startOpacity : m_targetOpacity);
69 } else if (newState == Stopped) {
70 w->setOpacity(direction() == Forward ? m_targetOpacity : m_startOpacity);
71 }
72}
73
74void FadeAnimation::updateEffectiveTime(int currentTime)
75{
76 QGraphicsWidget *w = targetWidget();
77 if (w) {
78 qreal delta = currentTime / qreal(duration());
79 delta *= m_startOpacity - m_targetOpacity;
80 w->setOpacity(m_startOpacity - delta);
81 }
82}
83
84} //namespace Plasma
85
86#include "fade_p.moc"
QGraphicsWidget
QObject
Plasma
Namespace for everything in libplasma.
Definition: abstractdialogmanager.cpp:25
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