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zoom.cpp
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1/*
2 * Copyright 2009 Igor Trindade Oliveira <igor.oliveira@indt.org.br>
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 "zoom_p.h"
21
22#include <kdebug.h>
23
24namespace Plasma
25{
26
27ZoomAnimation::ZoomAnimation(QObject *parent)
28 : EasingAnimation(parent),
29 m_zoom(0)
30{
31}
32
33ZoomAnimation::~ZoomAnimation()
34{
35}
36
37void ZoomAnimation::setZoom(qreal zoom)
38{
39 m_zoom = zoom;
40}
41
42qreal ZoomAnimation::zoom() const
43{
44 return m_zoom;
45}
46
47void ZoomAnimation::updateState(QAbstractAnimation::State newState, QAbstractAnimation::State oldState)
48{
49 QGraphicsWidget *w = targetWidget();
50 if (!w) {
51 return;
52 }
53
54 if (oldState == Stopped && newState == Running) {
55 w->setTransformOriginPoint(w->size().width()/2, w->size().height()/2);
56 w->setScale(direction() == Forward ? 1 : m_zoom);
57 } else if (newState == Stopped) {
58 w->setScale(direction() == Forward ? m_zoom : 1);
59 }
60}
61
62void ZoomAnimation::updateEffectiveTime(int currentTime)
63{
64 QGraphicsWidget *w = targetWidget();
65 if (w) {
66 qreal delta = currentTime / qreal(duration());
67 if (m_zoom != 1) {
68 delta = (1 - m_zoom) * delta;
69 w->setScale(1 - delta);
70 } else {
71 w->setScale(delta);
72 }
73 }
74}
75
76} //namespace Plasma
QGraphicsWidget
QObject
Plasma
Namespace for everything in libplasma.
Definition: abstractdialogmanager.cpp:25
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