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__