introduced some comments for source navigation

1 files changed, 55 insertions, 6 deletions

diff --git a/tikzit/src/gui/tikzscene.cpp b/tikzit/src/gui/tikzscene.cpp
index 058835d..cd88f4e 100644
--- a/tikzit/src/gui/tikzscene.cpp
+++ b/tikzit/src/gui/tikzscene.cpp
@@ -1,3 +1,8 @@
+/**
+  * Manage the scene, which contains a single Graph, and respond to user input. This serves as
+  * the controller for the MVC (Graph, TikzView, TikzScene).
+  */
+
 #include "tikzit.h"
 #include "tikzscene.h"
 
@@ -9,7 +14,9 @@
 TikzScene::TikzScene(Graph *graph, QObject *parent) :
     QGraphicsScene(parent), _graph(graph)
 {
+}
 
+TikzScene::~TikzScene() {
 }
 
 Graph *TikzScene::graph() const
@@ -52,23 +59,65 @@ void TikzScene::graphReplaced()
 
 void TikzScene::mousePressEvent(QGraphicsSceneMouseEvent *event)
 {
-    // TODO: check if we grabbed a control point
+    QPointF mousePos(event->buttonDownScenePos(Qt::LeftButton).x(),
+                     event->buttonDownScenePos(Qt::LeftButton).y());
 
-    QGraphicsScene::mousePressEvent(event);
+
+    switch (tikzit->toolPalette()->currentTool()) {
+    case ToolPalette::SELECT:
+        // TODO: check if we grabbed a control point
+        QGraphicsScene::mousePressEvent(event);
+        if (!selectedItems().empty() && !items(mousePos).empty()) {
+            _oldNodePositions = new QHash<NodeItem*,QPointF>();
+            for (QGraphicsItem *gi : selectedItems()) {
+                if (NodeItem *ni = dynamic_cast<NodeItem*>(gi)) {
+                    _oldNodePositions->
+                }
+            }
+            qDebug() << "I am dragging";
+        }
+        break;
+    case ToolPalette::VERTEX:
+        break;
+    case ToolPalette::EDGE:
+        break;
+    case ToolPalette::CROP:
+        break;
+    }
 }
 
 void TikzScene::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
 {
-    //foreach (Edge *e, _graph->edges()) { e->updateControls(); }
+    switch (tikzit->toolPalette()->currentTool()) {
+    case ToolPalette::SELECT:
+        QGraphicsScene::mouseMoveEvent(event);
+        break;
+    case ToolPalette::VERTEX:
+        break;
+    case ToolPalette::EDGE:
+        break;
+    case ToolPalette::CROP:
+        break;
+    }
+
+    // TODO: only sync edges that change
     foreach (EdgeItem *ei, edgeItems) {
         ei->edge()->updateControls();
         ei->syncPos();
     }
-
-    QGraphicsScene::mouseMoveEvent(event);
 }
 
 void TikzScene::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
 {
-    QGraphicsScene::mouseReleaseEvent(event);
+    switch (tikzit->toolPalette()->currentTool()) {
+    case ToolPalette::SELECT:
+        QGraphicsScene::mouseReleaseEvent(event);
+        break;
+    case ToolPalette::VERTEX:
+        break;
+    case ToolPalette::EDGE:
+        break;
+    case ToolPalette::CROP:
+        break;
+    }
 }