subject_42536.htm

一些关于vc的问答

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序号：42536 发表者：草叶 发表日期：2003-06-04 08:40:42
<br>主题：如何用图片作为对话框或视图的背景？
<br>内容：如果用图片作为视图的背景，该怎样编程？
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回复者：Half_C 回复日期：2003-06-04 20:42:25
<br>内容：有一个WM_EREASBACK消息，处理函数提供一个CDC指针，你可以在里边处理！
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回复者：草叶 回复日期：2003-06-05 14:32:17
<br>内容：我不知道具体怎样画
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回复者：草叶 回复日期：2003-06-06 13:36:39
<br>内容：欢迎大家来观光
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回复者：MMGG 回复日期：2003-06-06 21:27:08
<br>内容：BitBlt(。。。）<BR>函数
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回复者：草叶 回复日期：2003-06-07 09:40:21
<br>内容：能否给段具体代码?谢谢
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回复者：tlw 回复日期：2003-06-07 10:05:09
<br>内容：在view中定义<BR>......<BR>CBitmap m_back;//背景图片<BR>CBrush m_backBrush;//背景刷子<BR>......<BR>自己做一个背景bitmap:IDB_BITMAP1;<BR>......<BR>int CBackView::OnCreate(LPCREATESTRUCT lpCreateStruct) <BR>{<BR>&nbsp;&nbsp;&nbsp;&nbsp;if (CView::OnCreate(lpCreateStruct) == -1)<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;return -1;<BR>&nbsp;&nbsp;&nbsp;&nbsp;<BR>&nbsp;&nbsp;&nbsp;&nbsp;// TODO: Add your specialized creation code here<BR>&nbsp;&nbsp;&nbsp;&nbsp;m_back.LoadBitmap(IDB_BITMAP1);<BR>&nbsp;&nbsp;&nbsp;&nbsp;m_backBrush.CreatePatternBrush(&amp;m_back);<BR>&nbsp;&nbsp;&nbsp;&nbsp;::SetClassLong(this-&gt;m_hWnd, GCL_HBRBACKGROUND, (long)&nbsp;&nbsp; m_backBrush.m_hObject);<BR>&nbsp;&nbsp;&nbsp;&nbsp;return 0;<BR>}
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回复者：草叶 回复日期：2003-06-07 13:41:49
<br>内容：::SetClassLong(this-&gt;m_hWnd, GCL_HBRBACKGROUND, (long)&nbsp;&nbsp; m_backBrush.m_hObject);<BR>这一句什么意思?<BR>对话框中也可以这样?
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回复者：m_tlwLyn 回复日期：2003-06-07 15:56:26
<br>内容：DWORD ::SetClassLong(HWND hWnd, int nIndex, LONG dwNewLong)<BR>修改生成制定窗口的窗口类的指定属性,是window API函数<BR>对于对话框:<BR>添加:<BR>CBitmap m_back;<BR>CBrush m_backBrush;<BR>...................<BR>BOOL CDialogDlg::OnInitDialog()<BR>{<BR>&nbsp;&nbsp;&nbsp;&nbsp;.............<BR>&nbsp;&nbsp; m_back.LoadBitmap(IDB_BITMAP1);<BR>&nbsp;&nbsp; m_backBrush.CreatePatternBrush(&amp;m_back);<BR>&nbsp;&nbsp; .............<BR>}<BR>................................<BR>void CDialogDlg::OnPaint() <BR>{<BR>&nbsp;&nbsp;&nbsp;&nbsp;if (IsIconic())<BR>&nbsp;&nbsp;&nbsp;&nbsp;{<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; .............................&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<BR>&nbsp;&nbsp;&nbsp;&nbsp;}<BR>&nbsp;&nbsp;&nbsp;&nbsp;else<BR>&nbsp;&nbsp;&nbsp;&nbsp;{<BR>&nbsp;&nbsp;&nbsp;&nbsp;CRect rect;<BR>&nbsp;&nbsp;&nbsp;&nbsp;CPaintDC dc(this);<BR>&nbsp;&nbsp;&nbsp;&nbsp;GetClientRect(rect);&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<BR>&nbsp;&nbsp;&nbsp;&nbsp;dc.FillRect(rect, &amp;m_backBrush);<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;CDialog::OnPaint();<BR>&nbsp;&nbsp;&nbsp;&nbsp;}<BR>}<BR>
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回复者：草叶 回复日期：2003-06-07 16:12:00
<br>内容：谢谢,我先看看<BR><BR>那响应WM_EREASBACK消息,行不行?我想知道这个消息里怎样写?
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<font color=red>答案被接受</font><br>回复者：m_tlwLyn 回复日期：2003-06-07 18:12:05
<br>内容：int CBackView::OnCreate(LPCREATESTRUCT lpCreateStruct) <BR>{<BR>&nbsp;&nbsp;&nbsp;&nbsp;if (CView::OnCreate(lpCreateStruct) == -1)<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;return -1;<BR>&nbsp;&nbsp;&nbsp;&nbsp;<BR>&nbsp;&nbsp;&nbsp;&nbsp;// TODO: Add your specialized creation code here<BR>&nbsp;&nbsp;&nbsp;&nbsp;m_back.LoadBitmap(IDB_BITMAP1);<BR>&nbsp;&nbsp;&nbsp;&nbsp;m_backBrush.CreatePatternBrush(&amp;m_back);<BR>&nbsp;&nbsp;&nbsp;&nbsp;return 0;<BR>}<BR>//同上,<BR>//在onEraseBkgnd中,提前返回TRUE,就可以了<BR>BOOL CBackView::OnEraseBkgnd(CDC* pDC) <BR>{<BR>&nbsp;&nbsp;&nbsp;&nbsp;// TODO: Add your message handler code here and/or call default<BR>&nbsp;&nbsp;&nbsp;&nbsp;CRect rect;<BR>&nbsp;&nbsp;&nbsp;&nbsp;GetClientRect(&amp;rect);<BR>&nbsp;&nbsp;&nbsp;&nbsp;pDC-&gt;FillRect(rect, &amp;m_backBrush);<BR>&nbsp;&nbsp;&nbsp;&nbsp;return TRUE;<BR>&nbsp;&nbsp;&nbsp;&nbsp;return CView::OnEraseBkgnd(pDC);<BR>}
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回复者：草叶 回复日期：2003-06-10 16:16:09
<br>内容：谢谢老兄，已经成功实现<BR>以后多指教
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