ModelEditor: Support editor's navigation history

For now only the id of the currently opened diagram is stored in the
navigation state. The position of scrollers is not saved.

Change-Id: Ic9b2237a0223596d1111c635f04f11e3951fd397
Reviewed-by: Tobias Hunger <tobias.hunger@theqtcompany.com>

1 files changed, 7 insertions, 1 deletions

diff --git a/src/plugins/modeleditor/modeleditor.h b/src/plugins/modeleditor/modeleditor.h
index 0579472960..67f2e10502 100644
--- a/src/plugins/modeleditor/modeleditor.h
+++ b/src/plugins/modeleditor/modeleditor.h
@@ -75,6 +75,8 @@ public:
 
     Core::IDocument *document() override;
     QWidget *toolBar() override;
+    QByteArray saveState() const override;
+    bool restoreState(const QByteArray &state) override;
 
     qmt::MDiagram *currentDiagram() const;
     void showDiagram(qmt::MDiagram *diagram);
@@ -127,7 +129,8 @@ private:
     void onRightHorizSplitterChanged(const QByteArray &state);
 
     void initToolbars();
-    void closeCurrentDiagram();
+    void openDiagram(qmt::MDiagram *diagram, bool addToHistory);
+    void closeCurrentDiagram(bool addToHistory);
     void closeDiagram(const qmt::MDiagram *diagram);
     void closeAllDiagrams();
 
@@ -138,6 +141,9 @@ private:
     void onDiagramSelectorSelected(int index);
     QString buildDiagramLabel(const qmt::MDiagram *diagram);
 
+    void addToNavigationHistory(const qmt::MDiagram *diagram);
+    QByteArray saveState(const qmt::MDiagram *diagram) const;
+
 private slots:
     void onEditSelectedElement();