SCaret::SCaret(SWND swnd,HBITMAP hBmp,int nWidth,int nHeight)
:m_owner(swnd)
{
CAutoRefPtr<IRenderTarget> pRT;
GETRENDERFACTORY->CreateRenderTarget(&pRT,nWidth,nHeight);
m_bmpCaret = (IBitmap*) pRT->GetCurrentObject(OT_BITMAP);
if(hBmp)
{
//以拉伸方式创建一个插入符位图
HDC hdc=pRT->GetDC(0);
HDC hdc2=CreateCompatibleDC(hdc);
SelectObject(hdc2,hBmp);
BITMAP bm;
GetObject(hBmp,sizeof(bm),&bm);
StretchBlt(hdc,0,0,nWidth,nHeight,hdc2,0,0,bm.bmWidth,bm.bmHeight,SRCCOPY);
DeleteDC(hdc2);
pRT->ReleaseDC(hdc);
}
else
{
//创建一个黑色插入符的位图
pRT->FillSolidRect(&CRect(0,0,nWidth,nHeight),RGBA(0,0,0,0xFF));
}
}
