Learn Arcengine (1)-zoom tool

 

Map operation Tools, most of the arcengine have ready-made, but these tools are not easy to use, such as the hint and name are in English, map operation without right button, can not and vs provided the tool bar control or Third-party toolbar control integration, or to achieve more flexible and convenient.

Let's start with the simplest zoom tool to implement the common tools for map manipulation.

Less nonsense, first on the code

   1:  using System;

   2:  using ESRI. Arcgis.carto;

   3:  using ESRI. Arcgis.geometry;

   4:  using ESRI. Arcgis.controls;

   5:  using ESRI. Arcgis.display;

   6:  using ESRI. Arcgis.systemui;

   7:  using ESRI. ArcGIS.ADF.CATIDs;

   8:  using System.Runtime.InteropServices;

   9:  

  Ten:  namespace TechFront.TPIS2.GisCommFun

  One:  {

  : Public      class Zoomin:icommand, Itool

  :      {

  14:         

  :          [DllImport ("Gdi32.dll")]

  :          static extern bool DeleteObject (IntPtr hobject);

  :  

  :          private System.Drawing.Bitmap M_bitmap;

  :          private IntPtr M_hbitmap;

  :          private Ihookhelper m_phookhelper;

  :          private Inewenvelopefeedback m_feedback;

  :          private IPoint m_point;

  :          private Boolean M_ismousedown;

  :          private System.Windows.Forms.Cursor m_zoomincur;

  :          private System.Windows.Forms.Cursor m_movezoomincur;

  Num:  

  : Public          ZoomIn ()

  :          {

  :              //load Resources

                string[] res = GetType (). Assembly.getmanifestresourcenames ();

  :              if (res. GetLength (0) > 0)

  :              {

                    M_bitmap = new System.Drawing.Bitmap (GetType (). Assembly.GetManifestResourceStream (GetType (), "Bmp.ZoomIn.bmp"));

  :                  if (m_bitmap!= null)

  :                  {

  A:                      m_bitmap. Maketransparent (M_bitmap. GetPixel (1, 1));

  Notoginseng:                      m_hbitmap = M_bitmap. Gethbitmap ();

  :                  }

  :              }

  :              m_phookhelper = new Hookhelperclass ();

  :          }

  :  

            ~zoomin ()

  :          {

  :              if (m_hbitmap.toint32 ()!= 0)

  :                  DeleteObject (M_HBITMAP);

  :  

                m_phookhelper = null;

  :              m_zoomincur = null;

  :              m_movezoomincur = null;

  Wuyi:          }

  I:  

            #region ICommand Members

  Si:  

  : Public          void OnClick ()

  A:          {

  :          }

  :  

  : Public          String Message

  %:          {

  %: Get              

  :              {

  A: Return                  "enlarge map";

  :              }

  :          }

  A:  

  : Public          int Bitmap

  :          {

  In: Get              

  :              {

  A: Return                  m_hbitmap.toint32 ();

  :              }

  A:          }

  The following:  

  "Public          void OnCreate" (Object hook)

  A:          {

  :              m_phookhelper.hook = Hook;

                m_zoomincur = new System.Windows.Forms.Cursor (GetType (). Assembly.GetManifestResourceStream (GetType (), "Cur.ZoomIn.cur"));

  :              m_movezoomincur = new System.Windows.Forms.Cursor (GetType (). Assembly.GetManifestResourceStream (GetType (), "Cur.MoveZoomIn.cur"));

  :          }

  Bayi:  

  Caption: Public          string

  %:          {

  : Get              

  :              {

  : Return                  "enlarge";

  :              }

  :          }

  :  

  : Public          String Tooltip

  A:          {

  : Get              

  M:              {

  : Return                  "enlarge";

  :              }

  :          }

  :  

  : Public          int HelpContextID

  :          {

M: Get              

A:              {

102:                  //TODO:  Add Zoomin.helpcontextid Getter Implementation

A: return                  0;

:              }

I:          }

The following:  

: Public          String Name

108:          {

109: Get              

A:              {

A: Return                  "ZoomIn";

112:              }

113:          }

114:  

: Public          bool Checked

116:          {

117: Get              

118:              {

119: Return                  false;

:              }

121:          }

122:  

123: Public          bool Enabled

124:          {

I: Get              

126:              {

127:                  if (m_phookhelper.focusmap = null) return false;

128:  

129: Return                  true;

130:              }

131:          }

132:  

HelpFile: Public          string

134:          {

135: Get              

136:              {

137:                  //TODO:  Add Zoomin.helpfile Getter Implementation

138: return                  null;

139:              }

140:          }

A:  

: Public          String Category

143:          {

144: Get              

145:              {

146: Return                  "Giscommfun";

147:              }

148:          }

149:  

A:          #endregion

151:  

152:          #region Itool Members

153:  

154: Public          void OnMouseDown (int button, int shift, int x, int y)

:          {

156:              if (M_phookhelper.activeview = null) return;

157:  

158:              //if The active view is a page layout

159:              if (M_phookhelper.activeview is ipagelayout)

160:              {

161:                  //create a point in map coordinates

162:                  IPoint ppoint = (IPoint) m_pHookHelper.ActiveView.ScreenDisplay.DisplayTransformation.ToMapPoint (x, y);

163:  

164:                  //get The map if is within a data frame

165:                  IMap pMap = M_pHookHelper.ActiveView.HitTestMap (ppoint);

166:  

167:                  if (pMap = null) return;

The following:  

169://set the map to being the                  page layout ' s focus map

170:                  if (pMap!= m_phookhelper.focusmap)

171:                  {

172:                      m_pHookHelper.ActiveView.FocusMap = PMap;

173:                      M_pHookHelper.ActiveView.PartialRefresh (esriviewdrawphase.esriviewgraphics, NULL, NULL);

174:                  }

175:              }

176:              //create a point in map coordinates

177:              Iactiveview pactiveview = (iactiveview) m_phookhelper.focusmap;

178:              m_point = PActiveView.ScreenDisplay.DisplayTransformation.ToMapPoint (x, y);

179:  

180:              M_ismousedown = true;

181:  

I:          }

183:  

184: Public          void OnMouseMove (int button, int shift, int x, int y)

185:          {

186:              if (!m_ismousedown) return;

187:  

188:              //get the Focus map

189:              Iactiveview Pactiveview = (iactiveview) m_phookhelper.focusmap;

190:  

191:              //start an envelope feedback

:              if (m_feedback = null)

193:              {

194:                  m_feedback = new Newenvelopefeedbackclass ();

195:                  m_feedback.display = Pactiveview.screendisplay;

196:                  M_feedback.start (M_point);

197:              }

198:  

199:              //move The envelope feedback

:              M_feedback.moveto (PActiveView.ScreenDisplay.DisplayTransformation.ToMapPoint (x, y));

201:          }

The following:  

203: Public          void OnMouseUp (int button, int shift, int x, int y)

204:          {

205:              if (!m_ismousedown) return;

206:  

207:              //get the Focus map

Pactiveview:              Iactiveview = (iactiveview) m_phookhelper.focusmap;

209:  

210:              //if a envelope has not been tracked

211:              Ienvelope penvelope;

212:  

213:              if (m_feedback = null)

214:              {

215:                  //zoom in from mouse click

216:                  penvelope = pactiveview.extent;

217:                  Penvelope.expand (0.5, 0.5, true);

218:                  Penvelope.centerat (M_point);

219:              }

:              Else

221:              {

222:                  //stop The envelope feedback

223:                  Penvelope = M_feedback.stop ();

224:  

:                  //exit If the envelope height or width is 0

:                  if (penvelope.width = 0 | | penvelope.height = 0)

I:                  {

228:                      m_feedback = null;

229:                      M_ismousedown = false;

230:                  }

231:              }

232:              //set The new extent

233:              pactiveview.extent = Penvelope;

234:              //refresh the active view

235:              Pactiveview.refresh ();

236:              m_feedback = null;

237:              M_ismousedown = false;

238:          }

239:  

: Public          void OnKeyDown (int keycode, int shift)

241:          {

242:              if (m_ismousedown)

243:              {

244:                  if (keycode = 27)

245:                  {

246:                      M_ismousedown = false;

247:                      m_feedback = null;

248:                      M_pHookHelper.ActiveView.PartialRefresh (esriviewdrawphase.esriviewforeground, NULL, NULL);

249:                  }

:              }

251:          }

252:  

253: Public          void OnKeyUp (int keycode, int shift)

254:          {

255:              //TODO:  Add zoomin.onkeyup Implementation

256:          }

257:  

258: public          int Cursor

259:          {

I: Get              

261:              {

262:                  if (m_ismousedown)

263: Return                      m_moveZoomInCur.Handle.ToInt32 ();

264:                  Else

265: Return                      m_zoomInCur.Handle.ToInt32 ();

266:              }

267:          }

268:  

MB: public          bool OnContextMenu (int x, int y)

270:          {

271:              //TODO:  Add Zoomin.oncontextmenu Implementation

272: Return              false;

273:          }

274:  

275: Public          bool Deactivate ()

276:          {

277: Return              true;

278:          }

279:  

280: Public          void Refresh (int hdc)

281:          {

282:              //TODO:  Add Zoomin.refresh Implementation

283:          }

284:  

285: Public          void OnDblClick ()

286:          {

287:              //TODO:  Add Zoomin.ondblclick Implementation

A:          }

289:  

290:          #endregion

291:      }

292:  }

In fact, the amplification tool is mainly to achieve Itool onmousedown, OnMouseMove, onmouseup three methods, set ICommand caption,tooltip, message, bitmap attributes, Implement the OnCreate method.

The three methods of Itool can be known by name, and three methods are performed when the left mouse button is pressed, while the mouse button is moved.

The Caption property is the text that is displayed by the Settings tool; ToolTip is the information that prompts when you set the mouse over the tool; Bitmap is the icon information for the Set tool