SelectByShape 工具的实现
1 public sealed class SelectByShapeTool : BaseTool 2 { 3 #region COM Registration Function(s) 4 [ComRegisterFunction()] 5 [ComVisible(false)] 6 static void RegisterFunction(Type registerType) 7 { 8 // Required for ArcGIS Component Category Registrar support 9 ArcGISCategoryRegistration(registerType); 10 11 // 12 // TODO: Add any COM registration code here 13 // 14 } 15 16 [ComUnregisterFunction()] 17 [ComVisible(false)] 18 static void UnregisterFunction(Type registerType) 19 { 20 // Required for ArcGIS Component Category Registrar support 21 ArcGISCategoryUnregistration(registerType); 22 23 // 24 // TODO: Add any COM unregistration code here 25 // 26 } 27 28 #region ArcGIS Component Category Registrar generated code 29 /// <summary> 30 /// Required method for ArcGIS Component Category registration - 31 /// Do not modify the contents of this method with the code editor. 32 /// </summary> 33 private static void ArcGISCategoryRegistration(Type registerType) 34 { 35 string regKey = string.Format("HKEY_CLASSES_ROOT\\CLSID\\{{{0}}}", registerType.GUID); 36 ControlsCommands.Register(regKey); 37 38 } 39 /// <summary> 40 /// Required method for ArcGIS Component Category unregistration - 41 /// Do not modify the contents of this method with the code editor. 42 /// </summary> 43 private static void ArcGISCategoryUnregistration(Type registerType) 44 { 45 string regKey = string.Format("HKEY_CLASSES_ROOT\\CLSID\\{{{0}}}", registerType.GUID); 46 ControlsCommands.Unregister(regKey); 47 48 } 49 50 #endregion 51 #endregion 52 53 private IHookHelper m_hookHelper; 54 private INewEnvelopeFeedback m_Feedback; 55 private IPoint m_point; 56 private bool isMouseDown = false; 57 IMap pMap; 58 59 public SelectByShapeTool() 60 { 61 // 62 // TODO: Define values for the public properties 63 // 64 base.m_category = "CustomTool"; //localizable text 65 base.m_caption = "拉框选择"; //localizable text 66 base.m_message = "拉框选择"; //localizable text 67 base.m_toolTip = "拉框选择"; //localizable text 68 base.m_name = "SelectByShape"; //unique id, non-localizable (e.g. "MyCategory_MyTool") 69 try 70 { 71 // 72 // TODO: change resource name if necessary 73 // 74 string bitmapResourceName = GetType().Name + ".bmp"; 75 base.m_bitmap = new Bitmap(GetType(), bitmapResourceName); 76 base.m_cursor = new System.Windows.Forms.Cursor(GetType(), GetType().Name + ".cur"); 77 } 78 catch (Exception ex) 79 { 80 System.Diagnostics.Trace.WriteLine(ex.Message, "Invalid Bitmap"); 81 } 82 } 83 84 #region Overridden Class Methods 85 86 /// <summary> 87 /// Occurs when this tool is created 88 /// </summary> 89 /// <param name="hook">Instance of the application</param> 90 public override void OnCreate(object hook) 91 { 92 if (m_hookHelper == null) 93 m_hookHelper = new HookHelperClass(); 94 95 m_hookHelper.Hook = hook; 96 // TODO: Add SelectByShapeTool.OnCreate implementation 97 } 98 99 /// <summary> 100 /// Occurs when this tool is clicked 101 /// </summary> 102 public override void OnClick() 103 { 104 // TODO: Add SelectByShapeTool.OnClick implementation 105 } 106 107 public override void OnMouseDown(int Button, int Shift, int X, int Y) 108 { 109 if (m_hookHelper.ActiveView == null) return; 110 //如果是视图 111 if (m_hookHelper.ActiveView is IActiveView) 112 { 113 IPoint pPoint = m_hookHelper.ActiveView.ScreenDisplay. 114 DisplayTransformation.ToMapPoint(X, Y) as IPoint; 115 pMap = m_hookHelper.ActiveView.HitTestMap(pPoint); 116 if (pMap != m_hookHelper.FocusMap) 117 { 118 m_hookHelper.ActiveView.FocusMap = pMap; 119 m_hookHelper.ActiveView.PartialRefresh(esriViewDrawPhase. 120 esriViewGraphics, null, null); 121 } 122 } 123 //在焦点地图上创建一个点 124 IActiveView pac = m_hookHelper.FocusMap as IActiveView; 125 m_point = pac.ScreenDisplay.DisplayTransformation.ToMapPoint(X, Y) as IPoint; 126 isMouseDown = true; 127 } 128 129 public override void OnMouseMove(int Button, int Shift, int X, int Y) 130 { 131 if (!isMouseDown) return; 132 //得到焦点图 133 IActiveView pac = m_hookHelper.FocusMap as IActiveView; 134 //初始化一个范围 135 if (m_Feedback == null) 136 { 137 m_Feedback = new NewEnvelopeFeedbackClass(); 138 m_Feedback.Display = pac.ScreenDisplay; 139 m_Feedback.Start(m_point); 140 } 141 //设置鼠标样式 142 143 //画范围 144 m_Feedback.MoveTo(pac.ScreenDisplay.DisplayTransformation.ToMapPoint(X, Y)); 145 } 146 147 public override void OnMouseUp(int Button, int Shift, int X, int Y) 148 { 149 //设置鼠标样式 150 151 if (!isMouseDown) return; 152 //IEnvelope pEnv; 153 IEnvelope pFeedEnv; 154 IGeometry pGeo; //查询用到图形，可能为点或者矩形 155 //得到焦点地图 156 IActiveView Pac = m_hookHelper.FocusMap as IActiveView; 157 //如果不画范围 158 if (m_Feedback == null) 159 { 160 return; 161 } 162 else 163 { 164 //停止画框 165 pFeedEnv = m_Feedback.Stop(); 166 pGeo = pFeedEnv as IGeometry; 167 } 168 169 ISelectionEnvironment pSelectEnv = new SelectionEnvironmentClass(); 170 //改变默认选择集的颜色 171 pSelectEnv.DefaultColor = MySymbology.GetRgbColor(110, 120, 210, 200); 172 //选择要素，把它放入选择集中 173 pMap = m_hookHelper.FocusMap; 174 pMap.SelectByShape(pGeo, pSelectEnv, false); 175 Pac.PartialRefresh(esriViewDrawPhase.esriViewGeoSelection, null, null); 176 177 isMouseDown = false; 178 m_Feedback = null; 179 m_point = null; 180 } 181 #endregion 182 }
参考资料：《ArcGIS Engine组件式开发及应用》 科学出版社
