Changeset 1059

Timestamp:

12/23/08 16:18:41 (16 years ago)

Author:

bspisic

Message:

#424
Implemented history stack for clipping areas - by pressing the "back" button the antecedent clipping area will be set

Location:

trunk/sources/HeuristicLab.Visualization

Files:

• LineChart.Designer.cs (modified) (1 diff)
• LineChart.cs (modified) (5 diffs)

trunk/sources/HeuristicLab.Visualization/LineChart.Designer.cs

@@ -45 +45 @@
           this.canvas.MouseDown += new System.Windows.Forms.MouseEventHandler(this.canvasUI1_MouseDown);
           this.canvas.MouseWheel += new System.Windows.Forms.MouseEventHandler(this.canvasUI1_MouseWheel);
+          this.canvas.KeyDown += new System.Windows.Forms.KeyEventHandler(this.canvasUI1_KeyDown);
           // 
           // LineChart

trunk/sources/HeuristicLab.Visualization/LineChart.cs

@@ -161 +161 @@
 
       SetLineClippingArea(newClippingArea);
+      historyStack.Push(newClippingArea);
     }
 
@@ -273 +274 @@
     #endregion
 
+    #region Zooming / Panning
+
+    private readonly Stack<RectangleD> historyStack = new Stack<RectangleD>();
     private RectangleShape rectangleShape;
+
+    private void canvasUI1_KeyDown(object sender, KeyEventArgs e) {
+      if(e.KeyCode == Keys.Back && historyStack.Count > 1) {
+        historyStack.Pop();
+
+        RectangleD clippingArea = historyStack.Peek();
+  
+        SetNewClippingArea(clippingArea);
+        canvas.Invalidate();
+      }
+    }
 
     private void canvasUI1_MouseDown(object sender, MouseEventArgs e) {
@@ -312 +327 @@
       canvas.MouseEventListener = null;
 
-      SetLineClippingArea(rectangleShape.Rectangle);
+      RectangleD clippingArea = rectangleShape.Rectangle;
+
+      SetLineClippingArea(clippingArea);
+      historyStack.Push(clippingArea);
+
       linesShape.RemoveShape(rectangleShape);
 
@@ -329 +348 @@
 
       panListener.SetNewClippingArea += SetNewClippingArea;
-      panListener.OnMouseUp += delegate { canvas.MouseEventListener = null; };
+      panListener.OnMouseUp += delegate {
+        historyStack.Push(linesShape.ClippingArea);
+        canvas.MouseEventListener = null;
+      };
 
       canvas.MouseEventListener = panListener;
@@ -340 +362 @@
       canvas.Invalidate();
     }
+
+    #endregion
   }
 }