Fix GitHub Issue #10: Zoom level changes on undo/redo

juzzlin · Dec 11, 2018 · 4ae1e8f · 4ae1e8f
1 parent 8d1bf5f
commit 4ae1e8f
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Showing 3 changed files with 9 additions and 1 deletion.
diff --git a/src/editorview.cpp b/src/editorview.cpp
@@ -430,6 +430,8 @@ void EditorView::zoomToFit(QRectF nodeBoundingRect)
     updateScale(m_scaleValue);
 
     centerOn(nodeBoundingRect.center());
+
+    m_nodeBoundingRect = nodeBoundingRect;
 }
 
 EditorView::~EditorView()

diff --git a/src/editorview.hpp b/src/editorview.hpp
@@ -144,6 +144,8 @@ public slots:
 
     // Width for the dummy drag edge
     double m_edgeWidth = 1.5;
+
+    QRectF m_nodeBoundingRect;
 };
 
 #endif // EDITORVIEW_HPP
diff --git a/src/mediator.cpp b/src/mediator.cpp
@@ -411,6 +411,9 @@ void Mediator::setTextSize(int textSize)
 
 void Mediator::setupMindMapAfterUndoOrRedo()
 {
+    auto oldSceneRect = m_editorScene->sceneRect();
+    auto oldCenter = m_editorView->mapToScene(m_editorView->viewport()->rect()).boundingRect().center();
+
     m_editorScene.reset(new EditorScene);
     m_editorScene->initialize();
 
@@ -421,7 +424,8 @@ void Mediator::setupMindMapAfterUndoOrRedo()
 
     connectGraphToUndoMechanism();
 
-    zoomToFit();
+    m_editorScene->setSceneRect(oldSceneRect);
+    m_editorView->centerOn(oldCenter);
 }
 
 void Mediator::undo()