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grow.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 "grow_p.h"
21
22#include <QRect>
23#include <kdebug.h>
24
25namespace Plasma
26{
27
28GrowAnimation::GrowAnimation(QObject *parent, qreal factor)
29 : EasingAnimation(parent), m_animFactor(factor)
30{
31}
32
33void GrowAnimation::setFactor(const qreal factor)
34{
35 m_animFactor = qMax(qreal(0.0), factor);
36}
37
38qreal GrowAnimation::factor() const
39{
40 return m_animFactor;
41}
42
43void GrowAnimation::updateEffectiveTime(int currentTime)
44{
45 QGraphicsWidget *w = targetWidget();
46 if (w && state() == QAbstractAnimation::Running) {
47 const qreal delta = currentTime / qreal(duration());
48 QRectF geometry;
49 geometry.setTopLeft(m_startGeometry.topLeft() * (1-delta) + (m_targetGeometry.topLeft() * delta));
50 geometry.setSize(m_startGeometry.size() * (1-delta) + (m_targetGeometry.size() * delta));
51 w->setGeometry(geometry);
52 }
53}
54
55void GrowAnimation::updateState(QAbstractAnimation::State newState, QAbstractAnimation::State oldState)
56{
57 if (oldState == QAbstractAnimation::Stopped && newState == QAbstractAnimation::Running) {
58 QGraphicsWidget *widget = targetWidget();
59 if (!widget) {
60 return;
61 }
62
63 QSizeF minimum = widget->effectiveSizeHint(Qt::MinimumSize);
64 QSizeF maximum = widget->effectiveSizeHint(Qt::MaximumSize);
65 m_startGeometry = widget->geometry();
66 qreal w = m_startGeometry.width();
67 qreal h = m_startGeometry.height();
68 qreal factor = m_animFactor;
69
70 //compute new geometry values
71 qreal newWidth;
72 qreal newHeight;
73 if (direction() == QAbstractAnimation::Forward) {
74 newWidth = qBound(minimum.width(), w * factor, maximum.width());
75 newHeight = qBound(minimum.height(), h * factor, maximum.height());
76 } else {
77 newWidth = qBound(minimum.width(), w / factor, maximum.width());
78 newHeight = qBound(minimum.height(), h / factor, maximum.height());
79 }
80
81 qreal newX;
82 qreal newY;
83 newX = m_startGeometry.x() - (newWidth - w)/2;
84 newY = m_startGeometry.y() - (newHeight - h)/2;
85
86 if (direction() == QAbstractAnimation::Forward) {
87 //the end geometry gets rounded to prevent things looking ugly
88 m_targetGeometry = QRect(newX, newY, newWidth, newHeight);
89 } else {
90 m_targetGeometry = m_startGeometry;
91 m_startGeometry = QRectF(newX, newY, newWidth, newHeight);
92 }
93 }
94}
95
96} //namespace Plasma
97
98#include "grow_p.moc"
99
QGraphicsWidget
QObject
Plasma
Namespace for everything in libplasma.
Definition: abstractdialogmanager.cpp:25
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