Long live Qt 4.5!

1 files changed, 198 insertions, 0 deletions

diff --git a/src/gui/widgets/qwidgetanimator.cpp b/src/gui/widgets/qwidgetanimator.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the QtGui module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 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 the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtCore/qtimer.h>
+#include <QtCore/qdatetime.h>
+#include <QtGui/qwidget.h>
+#include <QtGui/qtextedit.h>
+#include <QtGui/private/qwidget_p.h>
+#include <qdebug.h>
+
+#include "qwidgetanimator_p.h"
+
+QT_BEGIN_NAMESPACE
+
+static const int g_animation_steps = 12;
+static const int g_animation_interval = 16;
+
+// 1000 * (x/(1 + x*x) + 0.5) on interval [-1, 1]
+static const int g_animate_function[] =
+{
+    0, 1, 5, 12, 23, 38, 58, 84, 116, 155, 199, 251, 307, 368,
+    433, 500, 566, 631, 692, 748, 799, 844, 883, 915, 941, 961,
+    976, 987, 994, 998, 1000
+};
+static const int g_animate_function_points = sizeof(g_animate_function)/sizeof(int);
+
+static inline int animateHelper(int start, int stop, int step, int steps)
+{
+    if (start == stop)
+        return start;
+    if (step == 0)
+        return start;
+    if (step == steps)
+        return stop;
+
+    int x = g_animate_function_points*step/(steps + 1);
+    return start + g_animate_function[x]*(stop - start)/1000;
+}
+
+QWidgetAnimator::QWidgetAnimator(QObject *parent)
+    : QObject(parent)
+{
+    m_time = new QTime();
+    m_timer = new QTimer(this);
+    m_timer->setInterval(g_animation_interval);
+    connect(m_timer, SIGNAL(timeout()), this, SLOT(animationStep()));
+}
+
+QWidgetAnimator::~QWidgetAnimator()
+{
+    delete m_time;
+}
+
+void QWidgetAnimator::abort(QWidget *w)
+{
+    if (m_animation_map.remove(w) == 0)
+        return;
+    if (m_animation_map.isEmpty()) {
+        m_timer->stop();
+        emit finishedAll();
+    }
+}
+
+void QWidgetAnimator::animate(QWidget *widget, const QRect &_final_geometry, bool animate)
+{
+    QRect final_geometry = _final_geometry;
+
+    QRect r = widget->geometry();
+    if (r.right() < 0 || r.bottom() < 0)
+        r = QRect();
+
+    if (r.isNull() || final_geometry.isNull())
+        animate = false;
+
+    AnimationMap::const_iterator it = m_animation_map.constFind(widget);
+    if (it == m_animation_map.constEnd()) {
+        if (r == final_geometry) {
+            emit finished(widget);
+            return;
+        }
+    } else {
+        if ((*it).r2 == final_geometry)
+            return;
+    }
+
+    if (animate) {
+        AnimationItem item(widget, r, final_geometry);
+        m_animation_map[widget] = item;
+        if (!m_timer->isActive()) {
+            m_timer->start();
+            m_time->start();
+        }
+    } else {
+        m_animation_map.remove(widget);
+        if (m_animation_map.isEmpty())
+            m_timer->stop();
+
+        if (!final_geometry.isValid() && !widget->isWindow()) {
+            // Make the wigdet go away by sending it to negative space
+            QSize s = widget->size();
+            final_geometry = QRect(-500 - s.width(), -500 - s.height(), s.width(), s.height());
+        }
+        widget->setGeometry(final_geometry);
+
+        emit finished(widget);
+
+        if (m_animation_map.isEmpty())
+            emit finishedAll();
+
+        return;
+    }
+}
+
+void QWidgetAnimator::animationStep()
+{
+    int steps = (1 + m_time->restart())/g_animation_interval;
+    AnimationMap::iterator it = m_animation_map.begin();
+    while (it != m_animation_map.end()) {
+        AnimationItem &item = *it;
+
+        item.step = qMin(item.step + steps, g_animation_steps);
+
+        int x = animateHelper(item.r1.left(), item.r2.left(),
+                            item.step, g_animation_steps);
+        int y = animateHelper(item.r1.top(), item.r2.top(),
+                            item.step, g_animation_steps);
+        int w = animateHelper(item.r1.width(), item.r2.width(),
+                            item.step, g_animation_steps);
+        int h = animateHelper(item.r1.height(), item.r2.height(),
+                            item.step, g_animation_steps);
+
+        item.widget->setGeometry(x, y, w, h);
+
+        if (item.step == g_animation_steps) {
+            emit finished(item.widget);
+            AnimationMap::iterator tmp = it;
+            ++it;
+            m_animation_map.erase(tmp);
+        } else {
+            ++it;
+        }
+    }
+
+    if (m_animation_map.isEmpty()) {
+        m_timer->stop();
+        emit finishedAll();
+    }
+}
+
+bool QWidgetAnimator::animating() const
+{
+    return m_timer->isActive();
+}
+
+bool QWidgetAnimator::animating(QWidget *widget)
+{
+    return m_animation_map.contains(widget);
+}
+
+QT_END_NAMESPACE