1、放大命令实现
创建GIS类，选择Base Command模版，类的名称为ZoomIn，选择第2类：ArcMap MapControl or PageLayoutControl command
该类的源代码为：
using System;
using ESRI.ArcGIS.Carto;
using ESRI.ArcGIS.Geometry;
using ESRI.ArcGIS.Controls;
using ESRI.ArcGIS.Display;
using ESRI.ArcGIS.SystemUI;
using ESRI.ArcGIS.ADF.CATIDs;
using System.Runtime.InteropServices;
namespace GIS
{
[ClassInterface(ClassInterfaceType.None)]
[Guid("2C214724-BFA2-4e8c-BC5D-775C67FA6F51")]
public class ZoomIn : ICommand, ITool
{
#region COM Registration Function(s)
[ComRegisterFunction()]
[ComVisible(false)]
static void RegisterFunction(Type registerType)
{
// Required for ArcGIS Component Category Registrar support
ArcGISCategoryRegistration(registerType);
//
// TODO: Add any COM registration code here
//
}
[ComUnregisterFunction()]
[ComVisible(false)]
static void UnregisterFunction(Type registerType)
{
// Required for ArcGIS Component Category Registrar support
ArcGISCategoryUnregistration(registerType);
//
// TODO: Add any COM unregistration code here
//
}
#region ArcGIS Component Category Registrar generated code
/// <summary>
/// Required method for ArcGIS Component Category registration -
/// Do not modify the contents of this method with the code editor.
/// </summary>
private static void ArcGISCategoryRegistration(Type registerType)
{
string regKey = string.Format("HKEY_CLASSES_ROOT\\CLSID\\{{{0}}}", registerType.GUID);
ControlsCommands.Register(regKey);
}
/// <summary>
/// Required method for ArcGIS Component Category unregistration -
/// Do not modify the contents of this method with the code editor.
/// </summary>
private static void ArcGISCategoryUnregistration(Type registerType)
{
string regKey = string.Format("HKEY_CLASSES_ROOT\\CLSID\\{{{0}}}", registerType.GUID);
ControlsCommands.Unregister(regKey);
}
#endregion
#endregion
[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;
public ZoomIn()
{
//Load resources
string[] res = GetType().Assembly.GetManifestResourceNames();
if(res.GetLength(0) > 0)
{
m_bitmap = new System.Drawing.Bitmap(GetType().Assembly.GetManifestResourceStream(GetType(), "ZoomIn.bmp"));
if(m_bitmap != null)
{
m_bitmap.MakeTransparent(m_bitmap.GetPixel(1,1));
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;
}
#region ICommand Members
public void OnClick()
{
}
public string Message
{
get
{
return "zooms the Display In By Rectangle or Single Click";
}
}
public int Bitmap
{
get
{
return m_hBitmap.ToInt32();
}
}
public void OnCreate(object hook)
{
m_pHookHelper.Hook = hook;
m_zoomInCur = new System.Windows.Forms.Cursor(GetType().Assembly.GetManifestResourceStream(GetType(), "ZoomIn.cur"));
m_moveZoomInCur = new System.Windows.Forms.Cursor(GetType().Assembly.GetManifestResourceStream(GetType(), "MoveZoomIn.cur"));
}
public string Caption
{
get
{
return "Zoom In";
}
}
public string Tooltip
{
get
{
return "Zoom In";
}
}
public int HelpContextID
{
get
{
// TODO: Add ZoomIn.HelpContextID getter implementation
return 0;
}
}
public string Name
{
get
{
return "Sample_Pan/Zoom_Zoom In";
}
}
public bool Checked
{
get
{
return false;
}
}
public bool Enabled
{
get
{
if(m_pHookHelper.FocusMap == null) return false;
return true;
}
}
public string HelpFile
{
get
{
// TODO: Add ZoomIn.HelpFile getter implementation
return null;
}
}
public string Category
{
get
{
return "Sample_Pan/Zoom";
}
}
#endregion
#region ITool Members
public void OnMouseDown(int button, int shift, int x, int y)
{
if(m_pHookHelper.ActiveView == null) return;
//If the active view is a page layout
if(m_pHookHelper.ActiveView is IPageLayout)
{
//Create a point in map coordinates
IPoint pPoint = (IPoint) m_pHookHelper.ActiveView.ScreenDisplay.DisplayTransformation.ToMapPoint(x, y);
//Get the map if the point is within a data frame
IMap pMap = m_pHookHelper.ActiveView.HitTestMap(pPoint);
if(pMap == null) return;
//Set the map to be the page layout's focus map
if(pMap != m_pHookHelper.FocusMap)
{
m_pHookHelper.ActiveView.FocusMap = pMap;
m_pHookHelper.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, null);
}
}
//Create a point in map coordinates
IActiveView pActiveView = (IActiveView) m_pHookHelper.FocusMap;
m_point = pActiveView.ScreenDisplay.DisplayTransformation.ToMapPoint(x, y);
m_isMouseDown = true;
}
public void OnMouseMove(int button, int shift, int x, int y)
{
if(!m_isMouseDown) return;
//Get the focus map
IActiveView pActiveView = (IActiveView) m_pHookHelper.FocusMap;
//Start an envelope feedback
if(m_feedBack == null)
{
m_feedBack = new NewEnvelopeFeedbackClass();
m_feedBack.Display = pActiveView.ScreenDisplay;
m_feedBack.Start(m_point);
}
//Move the envelope feedback
m_feedBack.MoveTo(pActiveView.ScreenDisplay.DisplayTransformation.ToMapPoint(x, y));
}
public void OnMouseUp(int button, int shift, int x, int y)
{
if(!m_isMouseDown) return;
//Get the focus map
IActiveView pActiveView = (IActiveView) m_pHookHelper.FocusMap;
//If an envelope has not been tracked
IEnvelope pEnvelope;
if(m_feedBack == null)
{
//Zoom in from mouse click
pEnvelope = pActiveView.Extent;
pEnvelope.Expand(0.5, 0.5, true);
pEnvelope.CenterAt(m_point);
}
else
{
//Stop the envelope feedback
pEnvelope = m_feedBack.Stop();
//Exit if the envelope height or width is 0
if(pEnvelope.Width ==0 || pEnvelope.Height == 0)
{
m_feedBack = null;
m_isMouseDown = false;
}
}
//Set the new extent
pActiveView.Extent = pEnvelope;
//Refresh the active view
pActiveView.Refresh();
m_feedBack = null;
m_isMouseDown = false;
}
public void OnKeyDown(int keyCode, int shift)
{
if(m_isMouseDown)
{
if(keyCode == 27)
{
m_isMouseDown = false;
m_feedBack = null;
m_pHookHelper.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewForeground, null, null);
}
}
}
public void OnKeyUp(int keyCode, int shift)
{
// TODO: Add ZoomIn.OnKeyUp implementation
}
public int Cursor
{
get
{
if(m_isMouseDown)
return m_moveZoomInCur.Handle.ToInt32();
else
return m_zoomInCur.Handle.ToInt32();
}
}
public bool OnContextMenu(int x, int y)
{
// TODO: Add ZoomIn.OnContextMenu implementation
return false;
}
public bool Deactivate()
{
return true;
}
public void Refresh(int hdc)
{
// TODO: Add ZoomIn.Refresh implementation
}
public void OnDblClick()
{
// TODO: Add ZoomIn.OnDblClick implementation
}
#endregion
}
}
调用：
ICommand command = new ZoomIn();
command.OnCreate(m_mapControl.Object);
ITool tool = command as ITool;
axMapControl1.CurrentTool = tool;
2、缩小命令实现
创建GIS类，选择Base Command模版，类的名称为ZoomOut，选择第2类：ArcMap MapControl or PageLayoutControl command
该类的源代码为：
using System;
using ESRI.ArcGIS.Carto;
using ESRI.ArcGIS.Geometry;
using ESRI.ArcGIS.Controls;
using ESRI.ArcGIS.Display;
using ESRI.ArcGIS.SystemUI;
using ESRI.ArcGIS.ADF.CATIDs;
using System.Runtime.InteropServices;
namespace GIS
{
[ClassInterface(ClassInterfaceType.None)]
[Guid("03079006-888A-4691-941A-7B16F35E2C1E")]
public class ZoomOut : ICommand, ITool
{
#region COM Registration Function(s)
[ComRegisterFunction()]
[ComVisible(false)]
static void RegisterFunction(Type registerType)
{
// Required for ArcGIS Component Category Registrar support
ArcGISCategoryRegistration(registerType);
//
// TODO: Add any COM registration code here
//
}
[ComUnregisterFunction()]
[ComVisible(false)]
static void UnregisterFunction(Type registerType)
{
// Required for ArcGIS Component Category Registrar support
ArcGISCategoryUnregistration(registerType);
//
// TODO: Add any COM unregistration code here
//
}
#region ArcGIS Component Category Registrar generated code
/// <summary>
/// Required method for ArcGIS Component Category registration -
/// Do not modify the contents of this method with the code editor.
/// </summary>
private static void ArcGISCategoryRegistration(Type registerType)
{
string regKey = string.Format("HKEY_CLASSES_ROOT\\CLSID\\{{{0}}}", registerType.GUID);
ControlsCommands.Register(regKey);
}
/// <summary>
/// Required method for ArcGIS Component Category unregistration -
/// Do not modify the contents of this method with the code editor.
/// </summary>
private static void ArcGISCategoryUnregistration(Type registerType)
{
string regKey = string.Format("HKEY_CLASSES_ROOT\\CLSID\\{{{0}}}", registerType.GUID);
ControlsCommands.Unregister(regKey);
}
#endregion
#endregion
[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_zoomOutCur;
private System.Windows.Forms.Cursor m_moveZoomOutCur;
public ZoomOut()
{
//Load resources
string[] res = GetType().Assembly.GetManifestResourceNames();
if(res.GetLength(0) > 0)
{
m_bitmap = new System.Drawing.Bitmap(GetType().Assembly.GetManifestResourceStream(GetType(), "ZoomOut.bmp"));
if(m_bitmap != null)
{
m_bitmap.MakeTransparent(m_bitmap.GetPixel(1,1));
m_hBitmap = m_bitmap.GetHbitmap();
}
}
m_pHookHelper = new HookHelperClass ();
}
~ZoomOut()
{
if(m_hBitmap.ToInt32() != 0)
DeleteObject(m_hBitmap);
m_pHookHelper = null;
m_zoomOutCur = null;
m_moveZoomOutCur = null;
}
#region ICommand Members
public void OnClick()
{
}
public string Message
{
get
{
return "Zooms the display out by rectangle or single click";
}
}
public int Bitmap
{
get
{
return m_hBitmap.ToInt32();
}
}
public void OnCreate(object hook)
{
m_pHookHelper.Hook = hook;
m_zoomOutCur = new System.Windows.Forms.Cursor(GetType().Assembly.GetManifestResourceStream(GetType(), "ZoomOut.cur"));
m_moveZoomOutCur = new System.Windows.Forms.Cursor(GetType().Assembly.GetManifestResourceStream(GetType(), "MoveZoomOut.cur"));
}
public string Caption
{
get
{
return "Zoom Out";
}
}
public string Tooltip
{
get
{
return "Zoom Out";
}
}
public int HelpContextID
{
get
{
// TODO: Add ZoomOut.HelpContextID getter implementation
return 0;
}
}
public string Name
{
get
{
return "Sample_Pan/Zoom_Zoom Out";
}
}
public bool Checked
{
get
{
return false;
}
}
public bool Enabled
{
get
{
if(m_pHookHelper.FocusMap == null) return false;
return true;
}
}
public string HelpFile
{
get
{
// TODO: Add ZoomOut.HelpFile getter implementation
return null;
}
}
public string Category
{
get
{
return "Sample_Pan/Zoom";
}
}
#endregion
#region ITool Members
public void OnMouseDown(int button, int shift, int x, int y)
{
if(m_pHookHelper.ActiveView == null) return;
//If the active view is a page layout
if(m_pHookHelper.ActiveView is IPageLayout)
{
//Create a point in map coordinates
IPoint pPoint = (IPoint) m_pHookHelper.ActiveView.ScreenDisplay.DisplayTransformation.ToMapPoint(x, y);
//Get the map if the point is within a data frame
IMap pMap = m_pHookHelper.ActiveView.HitTestMap(pPoint);
if(pMap == null) return;
//Set the map to be the page layout's focus map
if(pMap != m_pHookHelper.FocusMap)
{
m_pHookHelper.ActiveView.FocusMap = pMap;
m_pHookHelper.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, null);
}
}
//Create a point in map coordinates
IActiveView pActiveView = (IActiveView) m_pHookHelper.FocusMap;
m_point = pActiveView.ScreenDisplay.DisplayTransformation.ToMapPoint(x, y);
m_isMouseDown = true;
}
public void OnMouseMove(int button, int shift, int x, int y)
{
if(!m_isMouseDown) return;
//Get the focus map
IActiveView pActiveView = (IActiveView) m_pHookHelper.FocusMap;
//Start an envelope feedback
if(m_feedBack == null)
{
m_feedBack = new NewEnvelopeFeedbackClass();
m_feedBack.Display = pActiveView.ScreenDisplay;
m_feedBack.Start(m_point);
}
//Move the envelope feedback
m_feedBack.MoveTo(pActiveView.ScreenDisplay.DisplayTransformation.ToMapPoint(x, y));
}
public void OnMouseUp(int button, int shift, int x, int y)
{
if(!m_isMouseDown) return;
IEnvelope pEnvelope;
IEnvelope pFeedEnvelope;
double newWidth, newHeight;
//Get the focus map
IActiveView pActiveView = (IActiveView) m_pHookHelper.FocusMap;
//If an envelope has not been tracked
if(m_feedBack == null)
{
//Zoom out from the mouse click
pEnvelope = pActiveView.Extent;
pEnvelope.Expand(2, 2, true);
pEnvelope.CenterAt(m_point);
}
else
{
//Stop the envelope feedback
pFeedEnvelope = m_feedBack.Stop();
//Exit if the envelope height or width is 0
if(pFeedEnvelope.Width == 0 || pFeedEnvelope.Height == 0)
{
m_feedBack = null;
m_isMouseDown = false;
}
newWidth = pActiveView.Extent.Width * (pActiveView.Extent.Width / pFeedEnvelope.Width);
newHeight = pActiveView.Extent.Height * (pActiveView.Extent.Height / pFeedEnvelope.Height);
//Set the new extent coordinates
pEnvelope = new EnvelopeClass();
pEnvelope.PutCoords(pActiveView.Extent.XMin - ((pFeedEnvelope.XMin - pActiveView.Extent.XMin) * (pActiveView.Extent.Width / pFeedEnvelope.Width)),
pActiveView.Extent.YMin - ((pFeedEnvelope.YMin - pActiveView.Extent.YMin) * (pActiveView.Extent.Height / pFeedEnvelope.Height)),
(pActiveView.Extent.XMin - ((pFeedEnvelope.XMin - pActiveView.Extent.XMin) * (pActiveView.Extent.Width / pFeedEnvelope.Width))) + newWidth,
(pActiveView.Extent.YMin - ((pFeedEnvelope.YMin - pActiveView.Extent.YMin) * (pActiveView.Extent.Height / pFeedEnvelope.Height))) + newHeight);
}
//Set the new extent
pActiveView.Extent = pEnvelope;
//Refresh the active view
pActiveView.Refresh();
m_feedBack = null;
m_isMouseDown = false;
}
public void OnKeyDown(int keyCode, int shift)
{
if(m_isMouseDown)
{
if(keyCode == 27) //ESC key
{
m_feedBack = null;
m_isMouseDown = false;
m_pHookHelper.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewForeground, null, null);
}
}
}
public void OnKeyUp(int keyCode, int shift)
{
// TODO: Add ZoomOut.OnKeyUp implementation
}
public int Cursor
{
get
{
if(m_isMouseDown)
return m_moveZoomOutCur.Handle.ToInt32();
else
return m_zoomOutCur.Handle.ToInt32();
}
}
public bool OnContextMenu(int x, int y)
{
// TODO: Add ZoomOut.OnContextMenu implementation
return false;
}
public bool Deactivate()
{
return true;
}
public void Refresh(int hdc)
{
// TODO: Add ZoomOut.Refresh implementation
}
public void OnDblClick()
{
// TODO: Add ZoomOut.OnDblClick implementation
}
#endregion
}
}
调用：
ICommand command = new ZoomOut();
command.OnCreate(m_mapControl.Object);
ITool tool = command as ITool;
axMapControl1.CurrentTool = tool;
注：希望与大家分享下自己查找到的或者自己修改后的代码，新手学习，若有错误欢迎批评指正！