Changeset 1058

Timestamp:

12/23/08 15:44:47 (15 years ago)

Author:

bspisic

Message:

#424
Implemented zooming by holding the control key + scrolling

Location:

trunk/sources/HeuristicLab.Visualization

Files:

• LineChart.Designer.cs (modified) (2 diffs)
• LineChart.cs (modified) (4 diffs)
• ZoomListener.cs (modified) (1 diff)

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

@@ -1 @@
-namespace HeuristicLab.Visualization
+using System.Windows.Forms;
+
+namespace HeuristicLab.Visualization
 {
     partial class LineChart
@@ -42 +44 @@
           this.canvas.Text = "canvas";
           this.canvas.MouseDown += new System.Windows.Forms.MouseEventHandler(this.canvasUI1_MouseDown);
+          this.canvas.MouseWheel += new System.Windows.Forms.MouseEventHandler(this.canvasUI1_MouseWheel);
           // 
           // LineChart

trunk/sources/HeuristicLab.Visualization/LineChart.cs

@@ -63 +63 @@
       root.AddShape(linesShape);
 
-      legendShape = new LegendShape(0,0,0,0,0,Color.Black);
+      legendShape = new LegendShape(0, 0, 0, 0, 0, Color.Black);
       //legendShape.AddLegendItem(new LegendItem("test", Color.Red, 5));
       //legendShape.AddLegendItem(new LegendItem("test1", Color.Blue, 5));
@@ -74 +74 @@
       titleShape = new TextShape(0, 0, "Title", 15);
       root.AddShape(titleShape);
-
 
 
@@ -277 +276 @@
 
     private void canvasUI1_MouseDown(object sender, MouseEventArgs e) {
+      Focus();
+
       if (ModifierKeys == Keys.Control) {
         CreateZoomListener(e);
@@ -284 +285 @@
     }
 
+    private void canvasUI1_MouseWheel(object sender, MouseEventArgs e) {
+      if (ModifierKeys == Keys.Control) {
+        double zoomFactor = (e.Delta > 0) ? 0.9 : 1.1;
+
+        RectangleD clippingArea = ZoomListener.ZoomClippingArea(linesShape.ClippingArea, zoomFactor);
+
+        SetLineClippingArea(clippingArea);
+        canvas.Invalidate();
+      }
+    }
+
     private void CreateZoomListener(MouseEventArgs e) {
       ZoomListener zoomListener = new ZoomListener(e.Location);

trunk/sources/HeuristicLab.Visualization/ZoomListener.cs

@@ -53 +53 @@
 
     #endregion
+
+    public static RectangleD ZoomClippingArea(RectangleD clippingArea, double zoomFactor) {
+      double x1, x2, y1, y2, width, height;
+
+      width = clippingArea.Width * zoomFactor;
+      height = clippingArea.Height * zoomFactor;
+
+      x1 = clippingArea.X1 - (width - clippingArea.Width) / 2;
+      y1 = clippingArea.Y1 - (height - clippingArea.Height) / 2;
+      x2 = width + x1;
+      y2 = height + y1;
+
+      return new RectangleD(x1, y1, x2, y2);
+    }
   }
 }