From 1ca36f064da2a3619f0f8058f48e9f9dc6d07436 Mon Sep 17 00:00:00 2001
From: Aleks Kissinger <aleks0@gmail.com>
Date: Sun, 23 Sep 2018 09:52:35 +0200
Subject: more consistent z-ordering

---
 src/gui/tikzscene.cpp    | 16 ++++++++++++++++
 src/gui/tikzscene.h      |  1 +
 src/gui/undocommands.cpp | 10 ++++++++++
 3 files changed, 27 insertions(+)

(limited to 'src')

diff --git a/src/gui/tikzscene.cpp b/src/gui/tikzscene.cpp
index 947620f..39f8b76 100644
--- a/src/gui/tikzscene.cpp
+++ b/src/gui/tikzscene.cpp
@@ -103,6 +103,8 @@ void TikzScene::graphReplaced()
         _nodeItems.insert(n, ni);
         addItem(ni);
     }
+
+    refreshZIndices();
 }
 
 void TikzScene::extendSelectionUp()
@@ -177,6 +179,20 @@ void TikzScene::extendSelectionRight()
     }
 }
 
+void TikzScene::refreshZIndices()
+{
+    qreal z = 0.0;
+    foreach (Edge *e, graph()->edges()) {
+        edgeItems()[e]->setZValue(z);
+        z += 1.0;
+    }
+
+    foreach (Node *n, graph()->nodes()) {
+        nodeItems()[n]->setZValue(z);
+        z += 1.0;
+    }
+}
+
 void TikzScene::mousePressEvent(QGraphicsSceneMouseEvent *event)
 {
     if (!_enabled) return;
diff --git a/src/gui/tikzscene.h b/src/gui/tikzscene.h
index 16af125..b7beca9 100644
--- a/src/gui/tikzscene.h
+++ b/src/gui/tikzscene.h
@@ -80,6 +80,7 @@ public slots:
     void extendSelectionDown();
     void extendSelectionLeft();
     void extendSelectionRight();
+    void refreshZIndices();
 
 protected:
     void mousePressEvent(QGraphicsSceneMouseEvent *event) override;
diff --git a/src/gui/undocommands.cpp b/src/gui/undocommands.cpp
index 2ed5034..7b254d1 100644
--- a/src/gui/undocommands.cpp
+++ b/src/gui/undocommands.cpp
@@ -157,6 +157,7 @@ void DeleteCommand::undo()
         if (_selEdges.contains(e)) ei->setSelected(true);
     }
 
+    _scene->refreshZIndices();
     GraphUpdateCommand::undo();
 }
 
@@ -180,6 +181,7 @@ void DeleteCommand::redo()
         _scene->graph()->removeNode(n);
     }
 
+    _scene->refreshZIndices();
     GraphUpdateCommand::redo();
 }
 
@@ -199,6 +201,7 @@ void AddNodeCommand::undo()
 
     //_scene->setBounds(_oldBounds);
 
+    _scene->refreshZIndices();
     GraphUpdateCommand::undo();
 }
 
@@ -212,6 +215,7 @@ void AddNodeCommand::redo()
 
     //_scene->setBounds(_newBounds);
 
+    _scene->refreshZIndices();
     GraphUpdateCommand::redo();
 }
 
@@ -228,6 +232,7 @@ void AddEdgeCommand::undo()
     delete ei;
 
     _scene->graph()->removeEdge(_edge);
+    _scene->refreshZIndices();
     GraphUpdateCommand::undo();
 }
 
@@ -245,6 +250,7 @@ void AddEdgeCommand::redo()
         ei->stackBefore(_scene->nodeItems()[_scene->graph()->nodes().first()]);
     }
 
+    _scene->refreshZIndices();
     GraphUpdateCommand::redo();
 }
 
@@ -361,6 +367,7 @@ void PasteCommand::undo()
 	foreach(Node *n, _oldSelectedNodes) _scene->nodeItems()[n]->setSelected(true);
 	foreach(Edge *e, _oldSelectedEdges) _scene->edgeItems()[e]->setSelected(true);
 
+    _scene->refreshZIndices();
     GraphUpdateCommand::undo();
 }
 
@@ -384,6 +391,7 @@ void PasteCommand::redo()
         ni->setSelected(true);
     }
 
+    _scene->refreshZIndices();
     GraphUpdateCommand::redo();
 }
 
@@ -428,6 +436,7 @@ void ReplaceGraphCommand::undo()
     }
     _scene->tikzDocument()->setGraph(_oldGraph);
     _scene->graphReplaced();
+    GraphUpdateCommand::undo();
 }
 
 void ReplaceGraphCommand::redo()
@@ -439,6 +448,7 @@ void ReplaceGraphCommand::redo()
     }
     _scene->tikzDocument()->setGraph(_newGraph);
     _scene->graphReplaced();
+    GraphUpdateCommand::redo();
 }
 
 ReflectNodesCommand::ReflectNodesCommand(TikzScene *scene, QSet<Node*> nodes, bool horizontal, QUndoCommand *parent) :
-- 
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