[2768] | 1 | using System;
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| 2 | using System.Diagnostics;
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| 3 | using System.Collections;
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| 4 | using System.Drawing;
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| 5 | using System.Windows.Forms;
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| 6 |
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| 7 | namespace Netron.Diagramming.Core
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| 8 | {
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| 9 | // ----------------------------------------------------------------------
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| 10 | /// <summary>
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| 11 | /// This tool implements the standard rectangular selection mechanism.
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| 12 | /// There are two modes (much like Visio).
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| 13 | /// <list type="bullet">
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| 14 | /// <item><term>Inclusive</term><description>elements are selected if
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| 15 | /// they are contained in the selection rectangle</description></item>
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| 16 | /// <item><term>Touching</term><description>elements are selected if the
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| 17 | /// selection rectangle has an overlap with the element</description>
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| 18 | /// </item>
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| 19 | /// </list>
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| 20 | /// <para>Note that this tool is slightly different than other tools
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| 21 | /// since it activates itself unless it has been suspended by another
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| 22 | /// tool. </para>
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| 23 | /// </summary>
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| 24 | // ----------------------------------------------------------------------
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| 25 | public class SelectionTool : AbstractTool, IMouseListener
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| 26 | {
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| 27 | #region Fields
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| 28 |
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| 29 | // ------------------------------------------------------------------
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| 30 | /// <summary>
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| 31 | /// The location of the mouse when the motion starts.
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| 32 | /// </summary>
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| 33 | // ------------------------------------------------------------------
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| 34 | private Point initialPoint;
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| 35 |
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| 36 | #endregion
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| 37 |
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| 38 | #region Constructor
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| 39 | /// <summary>
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| 40 | /// Initializes a new instance of the <see cref="T:SelectionTool"/> class.
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| 41 | /// </summary>
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| 42 | /// <param name="name">The name of the tool.</param>
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| 43 | public SelectionTool(string name) : base(name)
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| 44 | {
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| 45 | }
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| 46 | #endregion
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| 47 |
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| 48 | #region Methods
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| 49 |
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| 50 | // ------------------------------------------------------------------
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| 51 | /// <summary>
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| 52 | /// Called when the tool is activated.
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| 53 | /// </summary>
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| 54 | // ------------------------------------------------------------------
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| 55 | protected override void OnActivateTool()
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| 56 | {
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| 57 | Controller.View.CurrentCursor = CursorPalette.Selection;
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| 58 | }
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| 59 |
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| 60 | // ------------------------------------------------------------------
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| 61 | /// <summary>
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| 62 | /// Handles the mouse down event.
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| 63 | /// </summary>
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| 64 | /// <param name="e">The
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| 65 | /// <see cref="T:System.Windows.Forms.MouseEventArgs"/> instance
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| 66 | /// containing the event data.</param>
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| 67 | // ------------------------------------------------------------------
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| 68 | public bool MouseDown(MouseEventArgs e)
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| 69 | {
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| 70 | if (e == null)
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| 71 | throw new ArgumentNullException(
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| 72 | "The argument object is 'null'");
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| 73 |
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| 74 | if (e.Button == MouseButtons.Left && Enabled && !IsSuspended)
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| 75 | {
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| 76 | if(Selection.SelectedItems.Count == 0 && Selection.Connector==null)
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| 77 | {
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| 78 | initialPoint = e.Location;
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| 79 | ActivateTool();
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| 80 | return true;// This tells the tool-loop to stop looking
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| 81 | // for another handler, which keeps the CPU low.
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| 82 | }
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| 83 | }
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| 84 | return false;
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| 85 | }
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| 86 |
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| 87 | // ------------------------------------------------------------------
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| 88 | /// <summary>
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| 89 | /// Handles the mouse move event.
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| 90 | /// </summary>
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| 91 | /// <param name="e">The
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| 92 | /// <see cref="T:System.Windows.Forms.MouseEventArgs"/> instance
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| 93 | /// containing the event data.</param>
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| 94 | // ------------------------------------------------------------------
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| 95 | public void MouseMove(MouseEventArgs e)
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| 96 | {
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| 97 | if (e == null)
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| 98 | throw new ArgumentNullException(
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| 99 | "The argument object is 'null'");
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| 100 | IView view = this.Controller.View;
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| 101 | Point point = e.Location;
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| 102 | if(IsActive && !IsSuspended)
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| 103 | {
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| 104 | Controller.View.PaintGhostRectangle(initialPoint, point);
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| 105 | Rectangle rec = System.Drawing.Rectangle.Inflate(
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| 106 | Controller.View.Ghost.Rectangle, 20, 20);
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| 107 |
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| 108 | Controller.View.Invalidate(rec);
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| 109 | }
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| 110 | }
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| 111 |
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| 112 | // ------------------------------------------------------------------
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| 113 | /// <summary>
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| 114 | /// Handles the mouse up event.
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| 115 | /// </summary>
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| 116 | /// <param name="e">The
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| 117 | /// <see cref="T:System.Windows.Forms.MouseEventArgs"/> instance
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| 118 | /// containing the event data.</param>
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| 119 | // ------------------------------------------------------------------
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| 120 | public void MouseUp(MouseEventArgs e)
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| 121 | {
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| 122 | if (IsActive)
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| 123 | {
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| 124 | DeactivateTool();
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| 125 | if(Controller.View.Ghost != null)
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| 126 | {
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| 127 | Selection.CollectEntitiesInside(
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| 128 | Controller.View.Ghost.Rectangle);//world space
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| 129 |
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| 130 | Controller.RaiseOnShowSelectionProperties(
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| 131 | new SelectionEventArgs(
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| 132 | Selection.SelectedItems.ToArray()));
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| 133 | }
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| 134 | Controller.View.ResetGhost();
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| 135 | }
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| 136 | }
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| 137 | #endregion
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| 138 | }
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| 139 |
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| 140 | }
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