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__
