Initial import

src/plugins/coreplugin/styleanimator.cpp

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+/***************************************************************************
+**
+** This file is part of Qt Creator
+**
+** Copyright (c) 2008 Nokia Corporation and/or its subsidiary(-ies).
+**
+** Contact:  Qt Software Information (qt-info@nokia.com)
+**
+** 
+** Non-Open Source Usage  
+** 
+** Licensees may use this file in accordance with the Qt Beta Version
+** License Agreement, Agreement version 2.2 provided with the Software or,
+** alternatively, in accordance with the terms contained in a written
+** agreement between you and Nokia.  
+** 
+** GNU General Public License Usage 
+** 
+** Alternatively, this file may be used under the terms of the GNU General
+** Public License versions 2.0 or 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the packaging
+** of this file.  Please review the following information to ensure GNU
+** General Public Licensing requirements will be met:
+**
+** http://www.fsf.org/licensing/licenses/info/GPLv2.html and
+** http://www.gnu.org/copyleft/gpl.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt GPL Exception version
+** 1.2, included in the file GPL_EXCEPTION.txt in this package.  
+** 
+***************************************************************************/
+#include "styleanimator.h"
+
+#include <QtGui/QStyleOption>
+
+
+Animation * StyleAnimator::widgetAnimation(const QWidget *widget) const
+{
+    if (!widget)
+        return 0;
+    foreach (Animation *a, animations) {
+        if (a->widget() == widget)
+            return a;
+    }
+    return 0;
+}
+
+void Animation::paint(QPainter *painter, const QStyleOption *option)
+{
+    Q_UNUSED(option);
+    Q_UNUSED(painter);
+}
+
+void Animation::drawBlendedImage(QPainter *painter, QRect rect, float alpha) {
+    if (_secondaryImage.isNull() || _primaryImage.isNull())
+        return;
+
+    if (_tempImage.isNull())
+        _tempImage = _secondaryImage;
+
+    const int a = qRound(alpha*256);
+    const int ia = 256 - a;
+    const int sw = _primaryImage.width();
+    const int sh = _primaryImage.height();
+    const int bpl = _primaryImage.bytesPerLine();
+    switch(_primaryImage.depth()) {
+    case 32:
+        {
+            uchar *mixed_data = _tempImage.bits();
+            const uchar *back_data = _primaryImage.bits();
+            const uchar *front_data = _secondaryImage.bits();
+            for (int sy = 0; sy < sh; sy++) {
+                quint32* mixed = (quint32*)mixed_data;
+                const quint32* back = (const quint32*)back_data;
+                const quint32* front = (const quint32*)front_data;
+                for (int sx = 0; sx < sw; sx++) {
+                    quint32 bp = back[sx];
+                    quint32 fp = front[sx];
+                    mixed[sx] =  qRgba ((qRed(bp)*ia + qRed(fp)*a)>>8,
+                                        (qGreen(bp)*ia + qGreen(fp)*a)>>8,
+                                        (qBlue(bp)*ia + qBlue(fp)*a)>>8,
+                                        (qAlpha(bp)*ia + qAlpha(fp)*a)>>8);
+                }
+                mixed_data += bpl;
+                back_data += bpl;
+                front_data += bpl;
+            }
+        }
+    default:
+        break;
+    }
+    painter->drawImage(rect, _tempImage);
+}
+
+void Transition::paint(QPainter *painter, const QStyleOption *option)
+{
+    float alpha = 1.0;
+    if (_duration > 0) {
+        QTime current = QTime::currentTime();
+
+        if (_startTime > current)
+            _startTime = current;
+
+        int timeDiff = _startTime.msecsTo(current);
+        alpha = timeDiff/(float)_duration;
+        if (timeDiff > _duration) {
+            _running = false;
+            alpha = 1.0;
+        }
+    }
+    else {
+        _running = false;    }
+    drawBlendedImage(painter, option->rect, alpha);
+}
+
+void StyleAnimator::timerEvent(QTimerEvent *)
+{
+    for (int i = animations.size() - 1 ; i >= 0 ; --i) {
+        if (animations[i]->widget())
+            animations[i]->widget()->update();
+
+        if (!animations[i]->widget() ||
+            !animations[i]->widget()->isEnabled() ||
+            !animations[i]->widget()->isVisible() ||
+            animations[i]->widget()->window()->isMinimized() ||
+            !animations[i]->running())
+        {
+            Animation *a = animations.takeAt(i);
+            delete a;
+        }
+    }
+    if (animations.size() == 0 && animationTimer.isActive()) {
+        animationTimer.stop();
+    }
+}
+
+void StyleAnimator::stopAnimation(const QWidget *w)
+{
+    for (int i = animations.size() - 1 ; i >= 0 ; --i) {
+        if (animations[i]->widget() == w) {
+            Animation *a = animations.takeAt(i);
+            delete a;
+            break;
+        }
+    }
+}
+
+void StyleAnimator::startAnimation(Animation *t)
+{
+    stopAnimation(t->widget());
+    animations.append(t);
+    if (animations.size() > 0 && !animationTimer.isActive()) {
+        animationTimer.start(35, this);
+    }
+}