New QmlDesigner plugin & Design mode

This adds a new "Design" mode that can be used to manipulate qml files
in a visual way. It will only get build if you have the declarativeui
module in Qt.

This is a squashed import from the Bauhaus project. Share & enjoy :)

1 files changed, 345 insertions, 0 deletions

diff --git a/src/plugins/qmldesigner/components/formeditor/movetool.cpp b/src/plugins/qmldesigner/components/formeditor/movetool.cpp
new file mode 100644
index 0000000000..09f5ec73c1
--- /dev/null
+++ b/src/plugins/qmldesigner/components/formeditor/movetool.cpp
@@ -0,0 +1,345 @@
+/**************************************************************************
+**
+** This file is part of Qt Creator
+**
+** Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
+**
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** Commercial Usage
+**
+** Licensees holding valid Qt Commercial licenses may use this file in
+** accordance with the Qt Commercial License Agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Nokia.
+**
+** 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.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at http://qt.nokia.com/contact.
+**
+**************************************************************************/
+
+#include "movetool.h"
+
+#include "formeditorscene.h"
+#include "formeditorview.h"
+#include "modelutilities.h"
+#include "itemutilfunctions.h"
+
+#include "resizehandleitem.h"
+
+#include <QApplication>
+#include <QGraphicsSceneMouseEvent>
+#include <QtDebug>
+
+namespace QmlDesigner {
+
+MoveTool::MoveTool(FormEditorView *editorView)
+    : AbstractFormEditorTool(editorView),
+    m_moveManipulator(editorView->scene()->manipulatorLayerItem(), editorView),
+    m_selectionIndicator(editorView->scene()->manipulatorLayerItem()),
+    m_resizeIndicator(editorView->scene()->manipulatorLayerItem())
+{
+//    view()->setCursor(Qt::SizeAllCursor);
+}
+
+
+MoveTool::~MoveTool()
+{
+
+}
+
+void MoveTool::clear()
+{
+    m_moveManipulator.clear();
+    m_movingItems.clear();
+    m_selectionIndicator.clear();
+    m_resizeIndicator.clear();
+}
+
+void MoveTool::mousePressEvent(const QList<QGraphicsItem*> &itemList,
+                                            QGraphicsSceneMouseEvent *event)
+{
+    if (itemList.isEmpty())
+        return;
+    m_movingItems = movingItems(items());
+    if (m_movingItems.isEmpty())
+        return;
+
+    m_moveManipulator.setItems(m_movingItems);
+    m_moveManipulator.begin(event->scenePos());
+}
+
+void MoveTool::mouseMoveEvent(const QList<QGraphicsItem*> &itemList,
+                                           QGraphicsSceneMouseEvent *event)
+{
+    if (m_movingItems.isEmpty())
+        return;
+
+//    m_selectionIndicator.hide();
+    m_resizeIndicator.hide();
+
+    FormEditorItem *containerItem = containerFormEditorItem(itemList, m_movingItems);
+    if (containerItem &&
+       containerItem != m_movingItems.first()->parentItem() &&
+       view()->currentState().isBaseState() &&
+       !event->modifiers().testFlag(Qt::ShiftModifier)) {
+
+        m_moveManipulator.reparentTo(containerItem);
+    }
+
+    MoveManipulator::Snapping useSnapping = MoveManipulator::NoSnapping;
+    if (event->modifiers().testFlag(Qt::ControlModifier) != view()->isSnapButtonChecked())
+        useSnapping = MoveManipulator::UseSnapping;
+
+    m_moveManipulator.update(event->scenePos(), useSnapping);
+}
+
+void MoveTool::hoverMoveEvent(const QList<QGraphicsItem*> &itemList,
+                        QGraphicsSceneMouseEvent * /*event*/)
+{
+    if (itemList.isEmpty()) {
+        view()->changeToSelectionTool();
+        return;
+    }
+
+    ResizeHandleItem* resizeHandle = ResizeHandleItem::fromGraphicsItem(itemList.first());
+    if (resizeHandle) {
+        view()->changeToResizeTool();
+        return;
+    }
+
+    if (!topSelectedItemIsMovable(itemList)) {
+        view()->changeToSelectionTool();
+        return;
+    }
+}
+
+void MoveTool::keyPressEvent(QKeyEvent *event)
+{
+    switch(event->key()) {
+        case Qt::Key_Shift:
+        case Qt::Key_Alt:
+        case Qt::Key_Control:
+        case Qt::Key_AltGr:
+            event->setAccepted(false);
+            return;
+    }
+
+    double moveStep = 1.0;
+
+    if (event->modifiers().testFlag(Qt::ShiftModifier))
+        moveStep = 10.0;
+
+    if (!event->isAutoRepeat()) {
+        QList<FormEditorItem*> movableItems(movingItems(items()));
+        if (movableItems.isEmpty())
+            return;
+
+        m_moveManipulator.setItems(movableItems);
+//        m_selectionIndicator.hide();
+        m_resizeIndicator.hide();
+    }
+
+    switch(event->key()) {
+        case Qt::Key_Left: m_moveManipulator.moveBy(-moveStep, 0.0); break;
+        case Qt::Key_Right: m_moveManipulator.moveBy(moveStep, 0.0); break;
+        case Qt::Key_Up: m_moveManipulator.moveBy(0.0, -moveStep); break;
+        case Qt::Key_Down: m_moveManipulator.moveBy(0.0, moveStep); break;
+    }
+
+
+}
+
+void MoveTool::keyReleaseEvent(QKeyEvent *keyEvent)
+{
+    switch(keyEvent->key()) {
+        case Qt::Key_Shift:
+        case Qt::Key_Alt:
+        case Qt::Key_Control:
+        case Qt::Key_AltGr:
+            keyEvent->setAccepted(false);
+            return;
+    }
+
+    if (!keyEvent->isAutoRepeat()) {
+        m_moveManipulator.clear();
+//        m_selectionIndicator.show();
+        m_resizeIndicator.show();
+    }
+}
+
+void MoveTool::mouseReleaseEvent(const QList<QGraphicsItem*> &/*itemList*/,
+                                 QGraphicsSceneMouseEvent *event)
+{
+    if (m_movingItems.isEmpty())
+        return;
+
+    QLineF moveVector(event->scenePos(), m_moveManipulator.beginPoint());
+    if (moveVector.length() < QApplication::startDragDistance())
+    {
+        QPointF beginPoint(m_moveManipulator.beginPoint());
+
+        m_moveManipulator.end(beginPoint);
+
+//        m_selectionIndicator.show();
+        m_resizeIndicator.show();
+        m_movingItems.clear();
+
+        view()->changeToSelectionTool(event);
+    } else {
+        m_moveManipulator.end(event->scenePos());
+
+        m_selectionIndicator.show();
+        m_resizeIndicator.show();
+        m_movingItems.clear();
+    }
+}
+
+void MoveTool::mouseDoubleClickEvent(const QList<QGraphicsItem*> & /*itemList*/,
+                                              QGraphicsSceneMouseEvent * /*event*/)
+{
+
+}
+
+void MoveTool::itemsAboutToRemoved(const QList<FormEditorItem*> &removedItemList)
+{
+    foreach (FormEditorItem* removedItem, removedItemList)
+        m_movingItems.removeOne(removedItem);
+}
+
+void MoveTool::selectedItemsChanged(const QList<FormEditorItem*> &itemList)
+{
+    m_selectionIndicator.setItems(movingItems(itemList));
+    m_resizeIndicator.setItems(itemList);
+    updateMoveManipulator();
+}
+
+bool MoveTool::haveSameParent(const QList<FormEditorItem*> &itemList)
+{
+    if (itemList.isEmpty())
+        return false;
+
+    QGraphicsItem *firstParent = itemList.first()->parentItem();
+    foreach (FormEditorItem* item, itemList)
+    {
+        if (firstParent != item->parentItem())
+            return false;
+    }
+
+    return true;
+}
+
+bool MoveTool::isAncestorOfAllItems(FormEditorItem* maybeAncestorItem,
+                                    const QList<FormEditorItem*> &itemList)
+{
+    foreach (FormEditorItem* item, itemList)
+    {
+        if (!maybeAncestorItem->isAncestorOf(item) && item != maybeAncestorItem)
+            return false;
+    }
+
+    return true;
+}
+
+
+FormEditorItem* MoveTool::ancestorIfOtherItemsAreChild(const QList<FormEditorItem*> &itemList)
+{
+    if (itemList.isEmpty())
+        return 0;
+
+
+    foreach (FormEditorItem* item, itemList)
+    {
+        if (isAncestorOfAllItems(item, itemList))
+            return item;
+    }
+
+    return 0;
+}
+
+void MoveTool::updateMoveManipulator()
+{
+    if (m_moveManipulator.isActive())
+        return;
+}
+
+void MoveTool::beginWithPoint(const QPointF &beginPoint)
+{
+    m_movingItems = movingItems(items());
+    if (m_movingItems.isEmpty())
+        return;
+
+    m_moveManipulator.setItems(m_movingItems);
+    m_moveManipulator.begin(beginPoint);
+}
+
+static bool isNotAncestorOfItemInList(FormEditorItem *formEditorItem, const QList<FormEditorItem*> &itemList)
+{
+    foreach (FormEditorItem *item, itemList) {
+        if (item->qmlItemNode().isAncestorOf(formEditorItem->qmlItemNode()))
+            return false;
+    }
+
+    return true;
+}
+
+FormEditorItem* MoveTool::containerFormEditorItem(const QList<QGraphicsItem*> &itemUnderMouseList,
+                                        const QList<FormEditorItem*> &selectedItemList)
+{
+    Q_ASSERT(!selectedItemList.isEmpty());
+
+    foreach (QGraphicsItem* item, itemUnderMouseList) {
+        FormEditorItem *formEditorItem = FormEditorItem::fromQGraphicsItem(item);
+        if (formEditorItem
+           && !selectedItemList.contains(formEditorItem)
+           && isNotAncestorOfItemInList(formEditorItem, selectedItemList))
+            if (formEditorItem->isContainer()) {
+                return formEditorItem;
+        }
+
+    }
+
+    return 0;
+}
+
+
+QList<FormEditorItem*> MoveTool::movingItems(const QList<FormEditorItem*> &selectedItemList)
+{
+    FormEditorItem* ancestorItem = ancestorIfOtherItemsAreChild(selectedItemList);
+
+    if (ancestorItem != 0 && ancestorItem->qmlItemNode().isRootNode()) {
+//        view()->changeToSelectionTool();
+        return QList<FormEditorItem*>();
+    }
+
+
+    if (ancestorItem != 0 && ancestorItem->parentItem() != 0)  {
+        QList<FormEditorItem*> ancestorItemList;
+        ancestorItemList.append(ancestorItem);
+        return ancestorItemList;
+    }
+
+    if (!haveSameParent(selectedItemList)) {
+//        view()->changeToSelectionTool();
+        return QList<FormEditorItem*>();
+    }
+
+    return selectedItemList;
+}
+
+void MoveTool::formEditorItemsChanged(const QList<FormEditorItem*> &itemList)
+{
+    m_selectionIndicator.updateItems(itemList);
+    m_resizeIndicator.updateItems(itemList);
+}
+
+}