Merged very early alpha-version of Dolphin 2.0

Dolphin 2.0 will get a new view-engine with the
following improvements:
- Better performance
- Animated transitions
- No clipped filenames due to dynamic item-sizes
- Grouping support for all view-modes
- Non-rectangular selection areas
- Simplified code for better maintenance

More details will be provided in a blog-entry during
the next days.

Please note that the code is in a very
early alpha-stage and although the most tricky parts
have been implemented already very basic things like
drag and drop or selections have not been pushed yet.
Those things are rather trivial to implement but this
still will take some time.

1 files changed, 241 insertions, 0 deletions

diff --git a/src/kitemviews/kitemlistviewanimation.cpp b/src/kitemviews/kitemlistviewanimation.cpp
new file mode 100644
index 000000000..449d557f9
--- /dev/null
+++ b/src/kitemviews/kitemlistviewanimation.cpp
@@ -0,0 +1,241 @@
+/***************************************************************************
+ *   Copyright (C) 2011 by Peter Penz <[email protected]>             *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ *   This program is distributed in the hope that it will be useful,       *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+ *   GNU General Public License for more details.                          *
+ *                                                                         *
+ *   You should have received a copy of the GNU General Public License     *
+ *   along with this program; if not, write to the                         *
+ *   Free Software Foundation, Inc.,                                       *
+ *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA            *
+ ***************************************************************************/
+
+#include "kitemlistviewanimation_p.h"
+
+#include "kitemlistview.h"
+
+#include <KDebug>
+
+#include <QGraphicsWidget>
+#include <QPropertyAnimation>
+
+KItemListViewAnimation::KItemListViewAnimation(QObject* parent) :
+    QObject(parent),
+    m_scrollOrientation(Qt::Vertical),
+    m_offset(0),
+    m_animation()
+{
+}
+
+KItemListViewAnimation::~KItemListViewAnimation()
+{
+    for (int type = 0; type < AnimationTypeCount; ++type) {
+        qDeleteAll(m_animation[type]);
+    }
+}
+
+void KItemListViewAnimation::setScrollOrientation(Qt::Orientation orientation)
+{
+    m_scrollOrientation = orientation;
+}
+
+Qt::Orientation KItemListViewAnimation::scrollOrientation() const
+{
+    return m_scrollOrientation;
+}
+
+void KItemListViewAnimation::setOffset(qreal offset)
+{
+    const qreal diff = m_offset - offset;
+    m_offset = offset;
+
+    // The change of the offset requires that the position of all
+    // animated QGraphicsWidgets get adjusted. An exception is made
+    // for the delete animation that should just fade away on the
+    // existing position.
+    for (int type = 0; type < AnimationTypeCount; ++type) {
+        if (type == DeleteAnimation) {
+            continue;
+        }
+
+        QHashIterator<QGraphicsWidget*, QPropertyAnimation*>  it(m_animation[type]);
+        while (it.hasNext()) {
+            it.next();
+
+            QGraphicsWidget* widget = it.key();
+            QPropertyAnimation* propertyAnim = it.value();
+
+            QPointF currentPos = widget->pos();
+            if (m_scrollOrientation == Qt::Vertical) {
+                currentPos.ry() += diff;
+            } else {
+                currentPos.rx() += diff;
+            }
+
+            if (type == MovingAnimation) {
+                // Stop the animation, calculate the moved start- and end-value
+                // and restart the animation for the remaining duration.
+                const int remainingDuration = propertyAnim->duration()
+                                              - propertyAnim->currentTime();
+
+                const bool block = propertyAnim->signalsBlocked();
+                propertyAnim->blockSignals(true);
+                propertyAnim->stop();
+
+                QPointF endPos = propertyAnim->endValue().toPointF();
+                if (m_scrollOrientation == Qt::Vertical) {
+                    endPos.ry() += diff;
+                } else {
+                    endPos.rx() += diff;
+                }
+
+                propertyAnim->setDuration(remainingDuration);
+                propertyAnim->setStartValue(currentPos);
+                propertyAnim->setEndValue(endPos);
+                propertyAnim->start();
+                propertyAnim->blockSignals(block);
+            } else {
+                widget->setPos(currentPos);
+            }
+        }
+    }
+}
+
+qreal KItemListViewAnimation::offset() const
+{
+    return m_offset;
+}
+
+void KItemListViewAnimation::start(QGraphicsWidget* widget, AnimationType type, const QVariant& endValue)
+{
+    stop(widget, type);
+
+    const int duration = 200;
+    QPropertyAnimation* propertyAnim = 0;
+
+    switch (type) {
+    case MovingAnimation: {
+        const QPointF newPos = endValue.toPointF();
+        if (newPos == widget->pos()) {
+            return;
+        }
+
+        propertyAnim = new QPropertyAnimation(widget, "pos");
+        propertyAnim->setDuration(duration);
+        propertyAnim->setEndValue(newPos);
+        break;
+    }
+
+    case CreateAnimation: {
+        propertyAnim = new QPropertyAnimation(widget, "opacity");
+        propertyAnim->setEasingCurve(QEasingCurve::InQuart);
+        propertyAnim->setDuration(duration);
+        propertyAnim->setStartValue(0.0);
+        propertyAnim->setEndValue(1.0);
+        break;
+    }
+
+    case DeleteAnimation: {
+        propertyAnim = new QPropertyAnimation(widget, "opacity");
+        propertyAnim->setEasingCurve(QEasingCurve::OutQuart);
+        propertyAnim->setDuration(duration);
+        propertyAnim->setStartValue(1.0);
+        propertyAnim->setEndValue(0.0);
+        break;
+    }
+
+    case ResizeAnimation: {
+        const QSizeF newSize = endValue.toSizeF();
+        if (newSize == widget->size()) {
+            return;
+        }
+
+        propertyAnim = new QPropertyAnimation(widget, "size");
+        propertyAnim->setDuration(duration);
+        propertyAnim->setEndValue(newSize);
+        break;
+    }
+
+    default:
+        break;
+    }
+
+    Q_ASSERT(propertyAnim);
+    connect(propertyAnim, SIGNAL(finished()), this, SLOT(slotFinished()));
+    m_animation[type].insert(widget, propertyAnim);
+
+    propertyAnim->start();
+}
+
+void KItemListViewAnimation::stop(QGraphicsWidget* widget, AnimationType type)
+{
+    QPropertyAnimation* propertyAnim = m_animation[type].value(widget);
+    if (propertyAnim) {
+        propertyAnim->stop();
+
+        switch (type) {
+        case MovingAnimation: break;
+        case CreateAnimation: widget->setOpacity(1.0); break;
+        case DeleteAnimation: widget->setOpacity(0.0); break;
+        case ResizeAnimation: break;
+        default: break;
+        }
+
+        m_animation[type].remove(widget);
+        delete propertyAnim;
+
+        emit finished(widget, type);
+    }
+}
+
+void KItemListViewAnimation::stop(QGraphicsWidget* widget)
+{
+    for (int type = 0; type < AnimationTypeCount; ++type) {
+        stop(widget, static_cast<AnimationType>(type));
+    }
+}
+
+bool KItemListViewAnimation::isStarted(QGraphicsWidget *widget, AnimationType type) const
+{
+    return m_animation[type].value(widget);
+}
+
+bool KItemListViewAnimation::isStarted(QGraphicsWidget* widget) const
+{
+    for (int type = 0; type < AnimationTypeCount; ++type) {
+        if (isStarted(widget, static_cast<AnimationType>(type))) {
+            return true;
+        }
+    }
+    return false;
+}
+
+void KItemListViewAnimation::slotFinished()
+{
+    QPropertyAnimation* finishedAnim = qobject_cast<QPropertyAnimation*>(sender());
+    for (int type = 0; type < AnimationTypeCount; ++type) {
+        QHashIterator<QGraphicsWidget*, QPropertyAnimation*> it(m_animation[type]);
+        while (it.hasNext()) {
+            it.next();
+            QPropertyAnimation* propertyAnim = it.value();
+            if (propertyAnim == finishedAnim) {
+                QGraphicsWidget* widget = it.key();
+                m_animation[type].remove(widget);
+                finishedAnim->deleteLater();
+
+                emit finished(widget, static_cast<AnimationType>(type));
+                return;
+            }
+        }
+    }
+    Q_ASSERT(false);
+}
+
+#include "kitemlistviewanimation_p.moc"