[1055] | 1 | using System.Drawing;
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| 2 | using System.Windows.Forms;
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| 3 |
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| 4 | namespace HeuristicLab.Visualization {
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| 5 | public class ZoomListener : IMouseEventListener {
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| 6 | private readonly Point startPoint;
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| 7 |
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| 8 | public event DrawRectangleHandler DrawRectangle;
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| 9 |
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| 10 | public ZoomListener(Point startPoint) {
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| 11 | this.startPoint = startPoint;
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| 12 | }
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| 13 |
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| 14 | #region IMouseEventListener Members
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| 15 |
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| 16 | public event MouseEventHandler OnMouseMove;
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| 17 | public event MouseEventHandler OnMouseUp;
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| 18 |
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| 19 | public void MouseMove(object sender, MouseEventArgs e) {
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| 20 | Rectangle r = new Rectangle();
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| 21 | Point actualPoint = e.Location;
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| 22 |
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| 23 | if (startPoint.X < actualPoint.X) {
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| 24 | r.X = startPoint.X;
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| 25 | r.Width = actualPoint.X - startPoint.X;
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| 26 | } else {
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| 27 | r.X = actualPoint.X;
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| 28 | r.Width = startPoint.X - actualPoint.X;
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| 29 | }
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| 30 |
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| 31 | if (startPoint.Y < actualPoint.Y) {
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| 32 | r.Y = startPoint.Y;
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| 33 | r.Height = actualPoint.Y - startPoint.Y;
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| 34 | } else {
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| 35 | r.Y = actualPoint.Y;
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| 36 | r.Height = startPoint.Y - actualPoint.Y;
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| 37 | }
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| 38 |
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| 39 | if(DrawRectangle != null) {
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| 40 | DrawRectangle(r);
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| 41 | }
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| 42 |
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| 43 | if (OnMouseMove != null) {
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| 44 | OnMouseMove(sender, e);
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| 45 | }
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| 46 | }
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| 47 |
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| 48 | public void MouseUp(object sender, MouseEventArgs e) {
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| 49 | if (OnMouseUp != null) {
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| 50 | OnMouseUp(sender, e);
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| 51 | }
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| 52 | }
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| 53 |
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| 54 | #endregion
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[1058] | 55 |
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| 56 | public static RectangleD ZoomClippingArea(RectangleD clippingArea, double zoomFactor) {
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| 57 | double x1, x2, y1, y2, width, height;
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| 58 |
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| 59 | width = clippingArea.Width * zoomFactor;
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| 60 | height = clippingArea.Height * zoomFactor;
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| 61 |
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| 62 | x1 = clippingArea.X1 - (width - clippingArea.Width) / 2;
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| 63 | y1 = clippingArea.Y1 - (height - clippingArea.Height) / 2;
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| 64 | x2 = width + x1;
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| 65 | y2 = height + y1;
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| 66 |
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| 67 | return new RectangleD(x1, y1, x2, y2);
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| 68 | }
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[1055] | 69 | }
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| 70 | } |
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