subject_27847.htm

vc

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序号：27847 发表者：James 发表日期：2003-01-15 20:49:40
<br>主题：如何画图？
<br>内容：如何在sdi程序的客户区中画一张图（bmp格式）以充满整个客户区？是不是应该在视图类的ondraw（）中来完成？这和视图的种类有关系吗？
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<font color=red>答案被接受</font><br>回复者：浪迹天涯 回复日期：2003-01-15 21:31:26
<br>内容：可以在ondraw（）完成。<BR><BR>在CXXView::OnDraw(CDC*pDC)<BR>{<BR>&nbsp;&nbsp; CRect rect;<BR>&nbsp;&nbsp; GetClientRect(&amp;rect);<BR>&nbsp;&nbsp; m_bitmap=new CBitmap();<BR>&nbsp;&nbsp; BITMAP bitmap;<BR>&nbsp;&nbsp; CDC *mdc=new CDC; // 定义内存DC指针<BR>&nbsp;&nbsp;&nbsp;&nbsp;m_bitmap-&gt;m_hObject=(HBITMAP)::LoadImage(NULL,"test.bmp",<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;IMAGE_BITMAP,0,0,LR_LOADFROMFILE);<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; // 加载位图<BR>&nbsp;&nbsp;&nbsp;&nbsp;mdc-&gt;CreateCompatibleDC(pDC); // 创建与pDC兼容的内存DC指针<BR>&nbsp;&nbsp;&nbsp;&nbsp;mdc-&gt;SelectObject(m_bitmap); <BR>&nbsp;&nbsp;&nbsp;&nbsp;m_bitmap-&gt;GetObject(sizeof(BITMAP),&amp;bitmap);<BR>&nbsp;&nbsp;&nbsp;&nbsp;int cxSource=bitmap.bmWidth;<BR>&nbsp;&nbsp;&nbsp;&nbsp;int cySource=bitmap.bmHeight;<BR>&nbsp;&nbsp;&nbsp;&nbsp;pDC-&gt;StretchBlt(0,0,rect.Width(),rect.Height(),mdc,0,0,cxSource,cySource,SRCCOPY);<BR>} <BR>
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