让ActiveX控件设计状态时在容器中的大小锁定,可以使用下面这个宏,该宏为无窗口的ActiveX控件,在vc++.net(atl7.0)下编译成功.
#ifndef __CONTROL_NO_WINDOW_WITH_ICON__
#define __CONTROL_NO_WINDOW_WITH_ICON__
#include <atltypes.h>
/*
本宏实现无窗口控件在设计模式时在设计窗口下显示一个小图标,窗口大小为固定图标大小
本宏继承了控件的四个函数
SetObjectRects 有些容器必须用这个函数指定窗口大小
GetExtent 容器向控件询问窗口大小
OnDraw 用来画图标
参数:
classControl 控件类名字
iconID 图标的ID
nCx 图标(控件窗口)宽度
nCY 图标(控件窗口)高度
*/
#define CONTROL_NO_WINDOW_WITH_ICON(classControl,iconID,nCx,nCy) \
public: \
STDMETHOD(SetObjectRects)(LPCRECT prcPos,LPCRECT prcClip) \
{ \
CSize size(prcPos->right - prcPos->left,prcPos->bottom - prcPos->top); \
\
if(size.cx!=nCx || size.cy!=nCy) \
{ \
m_spInPlaceSite->OnPosRectChange(CRect(prcPos->left,prcPos->top,prcPos->left+nCx,prcPos->top+nCy)); \
return S_OK; \
} \
\
IOleInPlaceObjectWindowlessImpl<classControl>::SetObjectRects(prcPos, prcClip); \
\
return S_OK; \
} \
\
STDMETHOD(GetExtent)(DWORD dwDrawAspect, LONG lindex, DVTARGETDEVICE* ptd, LPSIZEL lpsizel) \
{ \
HRESULT hr=IViewObjectExImpl<classControl>::GetExtent(dwDrawAspect,lindex,ptd,lpsizel); \
\
CSize sizePixel(nCx,nCy); \
CSize sizeNew; \
AtlPixelToHiMetric(&sizePixel,&sizeNew); \
\
if(hr==S_OK) \
{ \
lpsizel->cx=sizeNew.cx; \
lpsizel->cy=sizeNew.cy; \
} \
return hr; \
} \
\
STDMETHOD(GetExtent)(DWORD dwDrawAspect, LPSIZEL lpsizel) \
{ \
HRESULT hr=IOleObjectImpl<classControl>::GetExtent(dwDrawAspect,lpsizel); \
\
CSize sizePixel(nCx,nCy); \
CSize sizeNew; \
AtlPixelToHiMetric(&sizePixel,&sizeNew); \
\
if(hr==S_OK) \
{ \
lpsizel->cx=sizeNew.cx; \
lpsizel->cy=sizeNew.cy; \
} \
return hr; \
} \
\
HRESULT OnDraw(ATL_DRAWINFO& di) \
{ \
OLE_COLOR colorOle; \
GetAmbientBackColor(colorOle); \
COLORREF colorRgb; \
::OleTranslateColor(colorOle,0,&colorRgb); \
HBRUSH hBrush; \
hBrush=CreateSolidBrush(colorRgb); \
RECT& rc = *(RECT*)di.prcBounds; \
FillRect(di.hdcDraw,&rc,hBrush); \
DeleteObject(hBrush); \
SetBkMode(di.hdcDraw,TRANSPARENT); \
HICON hIcon=LoadIcon(_AtlBaseModule.GetResourceInstance(),MAKEINTRESOURCE(iconID)); \
DrawIcon(di.hdcDraw,rc.left,rc.top,hIcon); \
DeleteObject(hIcon); \
\
return S_OK; \
}
#endif//__CONTROL_NO_WINDOW_WITH_ICON__ 
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