1 files changed, 336 insertions, 0 deletions
diff --git a/src/plugins/qmltooling/qmldbg_inspector/editor/zoomtool.cpp b/src/plugins/qmltooling/qmldbg_inspector/editor/zoomtool.cpp
new file mode 100644
index 0000000..969c9d5
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+++ b/src/plugins/qmltooling/qmldbg_inspector/editor/zoomtool.cpp
@@ -0,0 +1,336 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtDeclarative module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** GNU Lesser General Public License Usage
+** 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 1.1, 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.
+**
+** Other Usage
+** Alternatively, this file may be used in accordance with the terms and
+** conditions contained in a signed written agreement between you and Nokia.
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "zoomtool_p.h"
+
+#include "../qdeclarativeviewinspector_p_p.h"
+
+#include <QtGui/QMouseEvent>
+#include <QtGui/QWheelEvent>
+#include <QtGui/QKeyEvent>
+#include <QtGui/QMenu>
+#include <QtGui/QAction>
+
+#include <QtCore/QRectF>
+#include <QtCore/QDebug>
+
+QT_BEGIN_NAMESPACE
+
+ZoomTool::ZoomTool(QDeclarativeViewInspector *view) :
+    AbstractLiveEditTool(view),
+    m_rubberbandManipulator(),
+    m_smoothZoomMultiplier(0.05f),
+    m_currentScale(1.0f)
+{
+    m_zoomTo100Action = new QAction(tr("Zoom to &100%"), this);
+    m_zoomInAction = new QAction(tr("Zoom In"), this);
+    m_zoomOutAction = new QAction(tr("Zoom Out"), this);
+    m_zoomInAction->setShortcut(QKeySequence(Qt::Key_Plus));
+    m_zoomOutAction->setShortcut(QKeySequence(Qt::Key_Minus));
+
+
+    LiveLayerItem *layerItem = QDeclarativeViewInspectorPrivate::get(view)->manipulatorLayer;
+    QGraphicsObject *layerObject = reinterpret_cast<QGraphicsObject *>(layerItem);
+    m_rubberbandManipulator = new LiveRubberBandSelectionManipulator(layerObject, view);
+
+
+    connect(m_zoomTo100Action, SIGNAL(triggered()), SLOT(zoomTo100()));
+    connect(m_zoomInAction, SIGNAL(triggered()), SLOT(zoomIn()));
+    connect(m_zoomOutAction, SIGNAL(triggered()), SLOT(zoomOut()));
+}
+
+ZoomTool::~ZoomTool()
+{
+    delete m_rubberbandManipulator;
+}
+
+void ZoomTool::mousePressEvent(QMouseEvent *event)
+{
+    m_mousePos = event->pos();
+
+    QPointF scenePos = view()->mapToScene(event->pos());
+
+    if (event->buttons() & Qt::RightButton) {
+        QMenu contextMenu;
+        contextMenu.addAction(m_zoomTo100Action);
+        contextMenu.addSeparator();
+        contextMenu.addAction(m_zoomInAction);
+        contextMenu.addAction(m_zoomOutAction);
+        contextMenu.exec(event->globalPos());
+    } else if (event->buttons() & Qt::LeftButton) {
+        m_dragBeginPos = scenePos;
+        m_dragStarted = false;
+    }
+}
+
+void ZoomTool::mouseMoveEvent(QMouseEvent *event)
+{
+    m_mousePos = event->pos();
+
+    QPointF scenePos = view()->mapToScene(event->pos());
+
+    if (event->buttons() & Qt::LeftButton
+            && (QPointF(scenePos - m_dragBeginPos).manhattanLength()
+                > Constants::DragStartDistance / 3)
+            && !m_dragStarted)
+    {
+        m_dragStarted = true;
+        m_rubberbandManipulator->begin(m_dragBeginPos);
+        return;
+    }
+
+    if (m_dragStarted)
+        m_rubberbandManipulator->update(scenePos);
+
+}
+
+void ZoomTool::mouseReleaseEvent(QMouseEvent *event)
+{
+    m_mousePos = event->pos();
+    QPointF scenePos = view()->mapToScene(event->pos());
+
+    if (m_dragStarted) {
+        m_rubberbandManipulator->end();
+
+        int x1 = qMin(scenePos.x(), m_rubberbandManipulator->beginPoint().x());
+        int x2 = qMax(scenePos.x(), m_rubberbandManipulator->beginPoint().x());
+        int y1 = qMin(scenePos.y(), m_rubberbandManipulator->beginPoint().y());
+        int y2 = qMax(scenePos.y(), m_rubberbandManipulator->beginPoint().y());
+
+        QPointF scenePosTopLeft = QPoint(x1, y1);
+        QPointF scenePosBottomRight = QPoint(x2, y2);
+
+        QRectF sceneArea(scenePosTopLeft, scenePosBottomRight);
+
+        m_currentScale = qMin(view()->rect().width() / sceneArea.width(),
+                              view()->rect().height() / sceneArea.height());
+
+
+        QTransform transform;
+        transform.scale(m_currentScale, m_currentScale);
+
+        view()->setTransform(transform);
+        view()->setSceneRect(sceneArea);
+    } else {
+        Qt::KeyboardModifier modifierKey = Qt::ControlModifier;
+#ifdef Q_WS_MAC
+        modifierKey = Qt::AltModifier;
+#endif
+        if (event->modifiers() & modifierKey) {
+            zoomOut();
+        } else {
+            zoomIn();
+        }
+    }
+}
+
+void ZoomTool::zoomIn()
+{
+    m_currentScale = nextZoomScale(ZoomIn);
+    scaleView(view()->mapToScene(m_mousePos));
+}
+
+void ZoomTool::zoomOut()
+{
+    m_currentScale = nextZoomScale(ZoomOut);
+    scaleView(view()->mapToScene(m_mousePos));
+}
+
+void ZoomTool::mouseDoubleClickEvent(QMouseEvent *event)
+{
+    m_mousePos = event->pos();
+}
+
+
+void ZoomTool::hoverMoveEvent(QMouseEvent *event)
+{
+    m_mousePos = event->pos();
+}
+
+
+void ZoomTool::keyPressEvent(QKeyEvent * /*event*/)
+{
+}
+
+void ZoomTool::wheelEvent(QWheelEvent *event)
+{
+    if (event->orientation() != Qt::Vertical)
+        return;
+
+    Qt::KeyboardModifier smoothZoomModifier = Qt::ControlModifier;
+    if (event->modifiers() & smoothZoomModifier) {
+        int numDegrees = event->delta() / 8;
+        m_currentScale += m_smoothZoomMultiplier * (numDegrees / 15.0f);
+
+        scaleView(view()->mapToScene(m_mousePos));
+
+    } else if (!event->modifiers()) {
+        if (event->delta() > 0) {
+            m_currentScale = nextZoomScale(ZoomIn);
+        } else if (event->delta() < 0) {
+            m_currentScale = nextZoomScale(ZoomOut);
+        }
+        scaleView(view()->mapToScene(m_mousePos));
+    }
+}
+
+void ZoomTool::keyReleaseEvent(QKeyEvent *event)
+{
+    switch (event->key()) {
+    case Qt::Key_Plus:
+        zoomIn();
+        break;
+    case Qt::Key_Minus:
+        zoomOut();
+        break;
+    case Qt::Key_1:
+    case Qt::Key_2:
+    case Qt::Key_3:
+    case Qt::Key_4:
+    case Qt::Key_5:
+    case Qt::Key_6:
+    case Qt::Key_7:
+    case Qt::Key_8:
+    case Qt::Key_9:
+    {
+        m_currentScale = ((event->key() - Qt::Key_0) * 1.0f);
+        scaleView(view()->mapToScene(m_mousePos)); // view()->mapToScene(view()->rect().center())
+        break;
+    }
+
+    default:
+        break;
+    }
+
+}
+
+void ZoomTool::itemsAboutToRemoved(const QList<QGraphicsItem*> &/*itemList*/)
+{
+}
+
+void ZoomTool::clear()
+{
+    view()->setCursor(Qt::ArrowCursor);
+}
+
+void ZoomTool::selectedItemsChanged(const QList<QGraphicsItem*> &/*itemList*/)
+{
+}
+
+void ZoomTool::scaleView(const QPointF &centerPos)
+{
+
+    QTransform transform;
+    transform.scale(m_currentScale, m_currentScale);
+    view()->setTransform(transform);
+
+    QPointF adjustedCenterPos = centerPos;
+    QSize rectSize(view()->rect().width() / m_currentScale,
+                   view()->rect().height() / m_currentScale);
+
+    QRectF sceneRect;
+    if (qAbs(m_currentScale - 1.0f) < Constants::ZoomSnapDelta) {
+        adjustedCenterPos.rx() = rectSize.width() / 2;
+        adjustedCenterPos.ry() = rectSize.height() / 2;
+    }
+
+    if (m_currentScale < 1.0f) {
+        adjustedCenterPos.rx() = rectSize.width() / 2;
+        adjustedCenterPos.ry() = rectSize.height() / 2;
+        sceneRect.setRect(view()->rect().width() / 2 -rectSize.width() / 2,
+                          view()->rect().height() / 2 -rectSize.height() / 2,
+                          rectSize.width(),
+                          rectSize.height());
+    } else {
+        sceneRect.setRect(adjustedCenterPos.x() - rectSize.width() / 2,
+                          adjustedCenterPos.y() - rectSize.height() / 2,
+                          rectSize.width(),
+                          rectSize.height());
+    }
+
+    view()->setSceneRect(sceneRect);
+}
+
+void ZoomTool::zoomTo100()
+{
+    m_currentScale = 1.0f;
+    scaleView(view()->mapToScene(view()->rect().center()));
+}
+
+qreal ZoomTool::nextZoomScale(ZoomDirection direction) const
+{
+    static QList<qreal> zoomScales =
+            QList<qreal>()
+            << 0.125f
+            << 1.0f / 6.0f
+            << 0.25f
+            << 1.0f / 3.0f
+            << 0.5f
+            << 2.0f / 3.0f
+            << 1.0f
+            << 2.0f
+            << 3.0f
+            << 4.0f
+            << 5.0f
+            << 6.0f
+            << 7.0f
+            << 8.0f
+            << 12.0f
+            << 16.0f
+            << 32.0f
+            << 48.0f;
+
+    if (direction == ZoomIn) {
+        for (int i = 0; i < zoomScales.length(); ++i) {
+            if (zoomScales[i] > m_currentScale || i == zoomScales.length() - 1)
+                return zoomScales[i];
+        }
+    } else {
+        for (int i = zoomScales.length() - 1; i >= 0; --i) {
+            if (zoomScales[i] < m_currentScale || i == 0)
+                return zoomScales[i];
+        }
+    }
+
+    return 1.0f;
+}
+
+QT_END_NAMESPACE