一起学习ArcEngine（5）全图

来源：互联网发布：在电脑上怎么编程编辑：程序博客网时间：2024/04/28 00:54

昨天写了一半突然断电，没有存盘，只有重写了，郁闷啊！

和zoomout、zoomin等工具不同，全图工具不用和地图交互，属于命令类工具，只要实现ICommand接口即可。参考zoomout的实现，首先新建一个基类CommandBase，实现Icommand接口，然后新建FullExtent类，继承这个基类，重写一下OnClick方法，即可。

   1:  public class CommandBase:BaseCommand,IDisposable

   2:      {

   3:          protected  IHookHelper m_pHookHelper;

4:

   5:          protected object m_pControl;

   6:          protected IActiveView m_pActiveView;

   7:          protected IMap m_pMap;

8:

   9:           ///

  10:           ///

  11:           ///

  12:           /// 工具的名称

  13:          public CommandBase(string str):base()

  14:          {

  15:              m_pHookHelper=new HookHelperClass();

  16:              InitialToolRes(str);

  17:          }

  18:          ///

  19:          ///

  20:          ///

  21:          /// 工具关联的地图控件

  22:          ///

  23:          public CommandBase(AxMapControl mapCtl, string str)

  24:              :this(str)

  25:          {

  26:              OnCreate(mapCtl.Object);

  27:          }

28:

  29:          ///

  30:          ///

  31:          ///

  32:          /// 工具关联的地图控件

  33:          ///

  34:          public CommandBase(AxPageLayoutControl plCtl, string str)

  35:              : this(str)

  36:          {

  37:              OnCreate(plCtl.Object);

  38:          }

39:

40:

  41:          public override void OnCreate(object hook)

  42:          {

  43:              m_pHookHelper.Hook=hook;

44:

  45:              if (hook is Control)

  46:              {

  47:                  m_pControl = hook;

  48:                  if (hook is AxMapControl)

  49:                  {

  50:                      AxMapControl mapcontrl = hook as AxMapControl;

  51:                      m_pHookHelper.Hook = mapcontrl.Object;

  52:                  }

  53:                  else if (hook is AxPageLayoutControl)

  54:                  {

  55:                      AxPageLayoutControl pagepcontrl = hook as AxPageLayoutControl;

  56:                      m_pHookHelper.Hook = pagepcontrl.Object;

  57:                  }

  58:              }

  59:              else

  60:              {

  61:                  if (hook is IMapControlDefault)

  62:                  {

  63:                      IMapControlDefault pMapDefault = hook as IMapControlDefault;

  64:                      m_pControl = Control.FromChildHandle(new IntPtr(pMapDefault.hWnd));

  65:                      m_pHookHelper.Hook = pMapDefault;

  66:                  }

  67:                  else if (hook is IPageLayoutControlDefault)

  68:                  {

  69:                      IPageLayoutControlDefault pPageDefault = hook as IPageLayoutControlDefault;

  70:                      m_pControl = Control.FromChildHandle(new IntPtr(pPageDefault.hWnd));

  71:                      m_pHookHelper.Hook = pPageDefault;

  72:                  }

  73:              }

74:

  75:              m_pActiveView = m_pHookHelper.ActiveView;

  76:              m_pMap = m_pHookHelper.FocusMap;

  77:          }

78:

79:

  80:          //初始化该功能的GUI资源

  81:          private  void InitialToolRes(string str)

  82:          {

  83:              ResourceManager pResourceManager = Resources.ResourceManager;

  84:              pResourceManager.IgnoreCase=true;

  85:              base.m_bitmap=(Bitmap)pResourceManager.GetObject("bmp"+str);

  86:              base.m_name = (string)pResourceManager.GetObject("na" + str);

  87:              base.m_caption = (string)pResourceManager.GetObject("cpt" + str);

  88:              if (m_caption == string.Empty) m_caption = m_name;

89:

  90:              base.m_category=(string)pResourceManager.GetObject("ctg"+str);

91:

  92:              base.m_message=(string)pResourceManager.GetObject("msg"+str);

  93:              if (m_message == string.Empty) m_message = m_name;

94:

  95:              base.m_toolTip=(string)pResourceManager.GetObject("tlt"+str);

  96:              if (m_toolTip == string.Empty) m_toolTip = m_name;

97:

  98:              pResourceManager.ReleaseAllResources();

  99:          }

 100:

 101:

 102:

 103:          #region IDisposable 成员

 104:

 105:          public void Dispose()

 106:          {

 107:              m_pHookHelper = null;

 108:              m_bitmap = null;

 109:              Marshal.ReleaseComObject(m_pHookHelper);

 110:          }

 111:

 112:          #endregion

 113:      }

.csharpcode, .csharpcode pre{font-size: small;color: black;font-family: consolas, "Courier New", courier, monospace;background-color: #ffffff;/*white-space: pre;*/}.csharpcode pre { margin: 0em; }.csharpcode .rem { color: #008000; }.csharpcode .kwrd { color: #0000ff; }.csharpcode .str { color: #006080; }.csharpcode .op { color: #0000c0; }.csharpcode .preproc { color: #cc6633; }.csharpcode .asp { background-color: #ffff00; }.csharpcode .html { color: #800000; }.csharpcode .attr { color: #ff0000; }.csharpcode .alt {background-color: #f4f4f4;width: 100%;margin: 0em;}.csharpcode .lnum { color: #606060; }

FullExtent类的代码如下，

   1:      public class FullExtent : CommandBase

   2:      {

   3:          public FullExtent()

   4:              : base("FullExtent")

   5:          { }

   6:          public FullExtent(AxMapControl mapCtl)

   7:              : base(mapCtl, "FullExtent")

   8:          { }

   9:          public FullExtent(AxPageLayoutControl plCtl)

  10:              : base(plCtl, "FullExtent")

  11:          { }

12:

  13:          public override void OnClick()

  14:          {

  15:              m_pActiveView.Extent = m_pActiveView.FullExtent;

  16:              m_pActiveView.Refresh();

  17:          }

  18:      }