mapcommandbase.h

在vc环境下

// MapCommandBase.h: interface for the CMapCommandBase class.
//
//////////////////////////////////////////////////////////////////////
#pragma once

#include "HookHelper.h"

// 
// Provides basic implementation of a command that requires a focus map
// Inherit this into your command object, then override any required functions
//
// Default behaviour
//   Enabled - True if there is a focus map
//   Checked - False
//   Name    - Combination of Caption and category
//   Caption - supplied from constructor
//   Tooltip - defaults to Caption if not supplied
//   Message - defaults to Caption is not supplied
//   OnCreate - Initialises hook
//   all others just return S_OK
//
// The constructor will initialise the base class with bitmaps and
// strings specified by resource ID's
//
class CMapCommandBase : public ICommand  
{
public:
	CMapCommandBase(UINT bitmapID = NULL, 
               UINT caption = NULL,     
               UINT category = NULL,
               UINT tooltip = NULL,
               UINT message = NULL,
               UINT helpfile = NULL,
               LONG helpID = 0);
	virtual ~CMapCommandBase();

// ICommand
public:
	STDMETHOD(get_Enabled)(VARIANT_BOOL * Enabled);
	STDMETHOD(get_Checked)(VARIANT_BOOL * Checked);
	STDMETHOD(get_Name)(BSTR * Name);
	STDMETHOD(get_Caption)(BSTR * Caption);
	STDMETHOD(get_Tooltip)(BSTR * Tooltip);
	STDMETHOD(get_Message)(BSTR * Message);
	STDMETHOD(get_HelpFile)(BSTR * HelpFile);
	STDMETHOD(get_HelpContextID)(LONG * helpID);
	STDMETHOD(get_Bitmap)(OLE_HANDLE * Bitmap);
	STDMETHOD(get_Category)(BSTR * categoryName);
	STDMETHOD(OnCreate)(IDispatch * hook);
	STDMETHOD(OnClick)();
 
// Helper functions
protected:	
	HRESULT GetFocusMapActiveView(IActiveView** ppActiveView);
	HRESULT GetFocusMapScreenDisplay(IScreenDisplay** ppScreenDisplay);
	HRESULT ToFocusMapPoint(LONG X, LONG Y, IPoint** ppPoint);

protected:
  CHookHelper m_hookHelper;
  HBITMAP     m_hBitmap;
  CComBSTR    m_bstrCaption;
  CComBSTR    m_bstrCategory;
  CComBSTR    m_bstrName;
  CComBSTR    m_bstrTooltip;
  CComBSTR    m_bstrMessage;
  CComBSTR    m_bstrHelpfile;
  LONG        m_lHelpID;

};