QmlDesigner: Add fit selection to screen button

* Add fit selection to screen action to designer actions
* Add button to form editor taskbar to trigger the action

Change-Id: I3774802f034892ea07782717c769c5141eae4bea
Reviewed-by: Thomas Hartmann <thomas.hartmann@qt.io>

src/plugins/qmldesigner/components/componentcore/componentcore_constants.h

@@ -84,6 +84,7 @@ const char flowAssignEffectCommandId[] = "AssignFlowEffect";
 const char flowAssignCustomEffectCommandId[] = "AssignFlowCustomEffect";
 const char addToGroupItemCommandId[] = "AddToGroupItem";
 const char fitRootToScreenCommandId[] = "FitRootToScreen";
+const char fitSelectionToScreenCommandId[] = "FitSelectionToScreen";
 
 const char selectionCategoryDisplayName[] = QT_TRANSLATE_NOOP("QmlDesignerContextMenu", "Selection");
 const char flowConnectionCategoryDisplayName[] = QT_TRANSLATE_NOOP("QmlDesignerContextMenu", "Connect");
@@ -157,6 +158,7 @@ const char flowAssignEffectDisplayName[] = "Assign FlowEffect ";
 const char flowAssignCustomEffectDisplayName[] = "Assign Custom FlowEffect ";
 
 const char fitRootToScreenDisplayName[] = QT_TRANSLATE_NOOP("QmlDesignerContextMenu", "Fit root to screen");
+const char fitSelectionToScreenDisplayName[] = QT_TRANSLATE_NOOP("QmlDesignerContextMenu", "Fit selection to screen");
 
 const char raiseToolTip[] = QT_TRANSLATE_NOOP("QmlDesignerContextMenu", "Raise selected item.");
 const char lowerToolTip[] = QT_TRANSLATE_NOOP("QmlDesignerContextMenu", "Lower selected item.");
@@ -177,6 +179,7 @@ const char addItemToStackedContainerToolTip[] = QT_TRANSLATE_NOOP("QmlDesignerCo
 const char addFlowActionToolTip[] = QT_TRANSLATE_NOOP("QmlDesignerContextMenu", "Add flow action.");
 
 const char fitRootToScreenToolTip[] = QT_TRANSLATE_NOOP("QmlDesignerContextMenu", "Fit the root element inside the available space.");
+const char fitSelectionToScreenToolTip[] = QT_TRANSLATE_NOOP("QmlDesignerContextMenu", "Fit the selected elements inside the available space.");
 
 const int priorityFirst = 280;
 const int prioritySelectionCategory = 220;

src/plugins/qmldesigner/components/componentcore/designeractionmanager.cpp

@@ -831,6 +831,17 @@ void DesignerActionManager::createDefaultDesignerActions()
                           182,
                           &fitRootToScreen));
 
+    addDesignerAction(new ModelNodeAction(
+                          fitSelectionToScreenCommandId,
+                          fitSelectionToScreenDisplayName,
+                          Utils::Icon({{":/utils/images/fittoview.png", Utils::Theme::IconsBaseColor}}).icon(),
+                          fitSelectionToScreenToolTip,
+                          genericToolBarCategory,
+                          QKeySequence(Qt::CTRL + Qt::ALT + Qt::Key_I),
+                          183,
+                          &fitSelectionToScreen,
+                          &selectionNotEmpty));
+
     addDesignerAction(new SeperatorDesignerAction(editCategory, 170));
 
     addDesignerAction(new VisiblityModelNodeAction(

src/plugins/qmldesigner/components/componentcore/modelnodeoperations.cpp

@@ -352,6 +352,15 @@ void fitRootToScreen(const SelectionContext &selectionState)
     selectionState.view()->emitCustomNotification(QStringLiteral("fit root to screen"));
 }
 
+void fitSelectionToScreen(const SelectionContext &selectionState)
+{
+    if (!selectionState.view())
+        return;
+
+    selectionState.view()->emitCustomNotification(QStringLiteral("fit selection to screen"),
+                                                  selectionState.selectedModelNodes());
+}
+
 void goIntoComponentOperation(const SelectionContext &selectionState)
 {
     goIntoComponent(selectionState.currentSingleSelectedNode());

src/plugins/qmldesigner/components/componentcore/modelnodeoperations.h

@@ -50,6 +50,7 @@ void setFillHeight(const SelectionContext &selectionState);
 void resetSize(const SelectionContext &selectionState);
 void resetPosition(const SelectionContext &selectionState);
 void fitRootToScreen(const SelectionContext &selectionState);
+void fitSelectionToScreen(const SelectionContext &selectionState);
 void goIntoComponentOperation(const SelectionContext &selectionState);
 void setId(const SelectionContext &selectionState);
 void resetZ(const SelectionContext &selectionState);

src/plugins/qmldesigner/components/formeditor/formeditorview.cpp

@@ -442,14 +442,13 @@ void FormEditorView::documentMessagesChanged(const QList<DocumentMessage> &error
         m_formEditorWidget->hideErrorMessageBox();
 }
 
-void FormEditorView::customNotification(const AbstractView * /*view*/, const QString &identifier, const QList<ModelNode> &/*nodeList*/, const QList<QVariant> &/*data*/)
+void FormEditorView::customNotification(const AbstractView * /*view*/, const QString &identifier, const QList<ModelNode> &nodeList, const QList<QVariant> &/*data*/)
 {
     if (identifier == QLatin1String("puppet crashed"))
         m_dragTool->clearMoveDelay();
     if (identifier == QLatin1String("reset QmlPuppet"))
         temporaryBlockView();
     if (identifier == QLatin1String("fit root to screen")) {
-
         if (QmlItemNode(rootModelNode()).isFlowView()) {
             QRectF boundingRect;
             for (QGraphicsItem *item : scene()->items()) {
@@ -470,6 +469,22 @@ void FormEditorView::customNotification(const AbstractView * /*view*/, const QSt
         float zoomLevel = ZoomAction::getClosestZoomLevel(scaleFactor);
         m_formEditorWidget->zoomAction()->forceZoomLevel(zoomLevel);
     }
+    if (identifier == QLatin1String("fit selection to screen")) {
+        if (nodeList.isEmpty())
+            return;
+
+        QRectF boundingRect;
+        for (const ModelNode &node : nodeList) {
+            if (FormEditorItem *item = scene()->itemForQmlItemNode(node))
+                boundingRect = boundingRect.united(item->sceneBoundingRect());
+        }
+
+        m_formEditorWidget->graphicsView()->fitInView(boundingRect,
+                                                      Qt::KeepAspectRatio);
+        const qreal scaleFactor = m_formEditorWidget->graphicsView()->viewportTransform().m11();
+        float zoomLevel = ZoomAction::getClosestZoomLevel(scaleFactor);
+        m_formEditorWidget->zoomAction()->forceZoomLevel(zoomLevel);
+    }
 }
 
 AbstractFormEditorTool *FormEditorView::currentTool() const