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分享我的对话框窗口上有自绘的ListBox，别的窗口在他上面移动时ListBox会闪烁得很厉害，但对话框自己移动时不闪烁，请问这是怎么回事？
我的对话框窗口上有自绘的ListBox，别的窗口在他上面移动时ListBox会闪烁得很厉害，但对话框自己移动时不闪烁，请问这是怎么回事？
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hxliurui 2005-11-09
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终于好了，不过是要把对话框和控件都加上WS_CLIPCHILDREN(控件不加WS_CLIPCHILDREN也可以)。而且对话框改变窗口风格不能在PreCreateWindow()里加，我是在OnInitDialog()里加ModifyStyle(0, WS_CLIPCHILDREN)。
psbeond 2005-11-08
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使用我上面说的方法不可能不行的。如果不行，说明你没处理好，到www.iuishop.com的下载页中去下载一个TreeListCtrl，里面有源代码，你参考一下。
hxliurui 2005-11-07
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有好心人吗？
hxliurui 2005-11-04
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我用上面的方法都试过了，还是不行。
我的界面是参考skinsyse做的http://www.codeproject.com/dialog/skinsyse.asp，在skinsyse的画面上拖动也会闪烁，困惑啊
我的界面是参考skinsyse做的http://www.codeproject.com/dialog/skinsyse.asp，在skinsyse的画面上拖动也会闪烁，困惑啊
hxliurui 2005-11-01
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为什么移动的时候不闪烁?也是调了OnPaint的啊
psbeond 2005-10-31
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对话框和控件都去掉WS_CLIPCHILDREN和WS_CLIPSIBLINGS风格,把listbox的erase background消息return TRUE;在WM_PAINT消息中, DefWindowProc(WM_PAINT, (WPARAM)memDC.m_hDC, 0),在把memDC的内容画到dc上.
goodboyws 2005-10-31
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假设你是在OnPaint画的
int CMyList::OnCreate(LPCREATESTRUCT lpCreateStruct)
{
CRect rc;
GetClientRect(rc);
CDC* pDC = GetDC();
m_MemDC.CreateCompatibleDC(pDC);
m_Bitmap.CreateCompatibleBitmap(pDC, rc.Width(), rc.Height());
m_MemDC.SelectObject(&m_Bitmap);
ReleaseDC(pDC);
return CListBox::OnCreate(lpCreateStruct);
}
void CMyList::OnPaint()
{
CRect rcClient;
GetClientRect(&rcClient);
CPaintDC dc(this);
if （m_bBitmap)
{
DrawList(&m_MemDC);
m_bBitmap = FALSE;
}
dc.BitBlt(0, 0, rcClient.Width(), rcClient.Height(),
&m_MemDC, 0, 0, SRCCOPY);
}
需要主动更新的时候将m_bBitmap置为TRUE;
int CMyList::OnCreate(LPCREATESTRUCT lpCreateStruct)
{
CRect rc;
GetClientRect(rc);
CDC* pDC = GetDC();
m_MemDC.CreateCompatibleDC(pDC);
m_Bitmap.CreateCompatibleBitmap(pDC, rc.Width(), rc.Height());
m_MemDC.SelectObject(&m_Bitmap);
ReleaseDC(pDC);
return CListBox::OnCreate(lpCreateStruct);
}
void CMyList::OnPaint()
{
CRect rcClient;
GetClientRect(&rcClient);
CPaintDC dc(this);
if （m_bBitmap)
{
DrawList(&m_MemDC);
m_bBitmap = FALSE;
}
dc.BitBlt(0, 0, rcClient.Width(), rcClient.Height(),
&m_MemDC, 0, 0, SRCCOPY);
}
需要主动更新的时候将m_bBitmap置为TRUE;
会思考的草 2005-10-31
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试试在创建窗口的时候去掉WS_CLIPSIBLINGS属性。
hxliurui 2005-10-31
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To goodboyws(深夜不眠者)
我没用DrawItem，把下面这段加上还是要闪。
BOOL CBitmapList::OnEraseBkgnd(CDC* pDC)
{
// TODO: Add your message handler code here and/or call default
return FALSE;
}
我没用DrawItem，把下面这段加上还是要闪。
BOOL CBitmapList::OnEraseBkgnd(CDC* pDC)
{
// TODO: Add your message handler code here and/or call default
return FALSE;
}
hxliurui 2005-10-31
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To happyparrot(快乐鹦鹉)
void CBitmapList::OnPaint()
{
CPaintDC dc(this); // device context for painting
CRect Rect;
GetClientRect(&Rect);
int Width = Rect.Width();
int Height = Rect.Height();
CDC MemDC;
MemDC.CreateCompatibleDC(&dc);
CBitmap MemBmp;
MemBmp.CreateCompatibleBitmap(&dc,Width,Height);
CBitmap *pOldMemBmp = MemDC.SelectObject(&MemBmp);
//我的对话框是不规则的一个BMP,m_Back是需要显示listbox的背景
CDC MemDC2;
MemDC2.CreateCompatibleDC(&dc);
CBitmap *pOldbmp = MemDC2.SelectObject(&m_Back);
MemDC.BitBlt(0,0,Width,Height,&MemDC2,0,0,SRCCOPY);
MemDC2.SelectObject(pOldbmp);
Rect.top = 0;
Rect.left = 0;
Rect.bottom = Rect.top + GetItemHeight(0);
Rect.right = Width;
int size = GetCount();
for (int i = GetTopIndex(); i < size && Rect.top <= Height;++i)
{
DrawItem(MemDC,i,Rect,GetSel(i));
Rect.OffsetRect(0,GetItemHeight(i));
}
dc.BitBlt(0,0,Width,Height,&MemDC,0,0,SRCCOPY);
m_SkinVerticleScrollbar.UpdateThumbPosition();
MemDC.SelectObject(pOldMemBmp);
}
void CBitmapList::DrawItem(CDC &Dc,int nIndex,CRect &Rect,BOOL Selected)
{
STRUCT_LBDATA* lpLBData = NULL;
CString strText;
if (nIndex == LB_ERR || nIndex >= GetCount())
return;
lpLBData = (STRUCT_LBDATA *)CListBox::GetItemDataPtr(nIndex);
if (lpLBData == NULL || lpLBData == (LPVOID)-1L) return;
CRect rcItem = Rect;
CRect rcIcon = Rect;
CRect rcText = Rect;
CRect rcCenteredText = Rect;
//在list item上画icon
// Calculate rcIcon
if (m_pImageList)
{
rcIcon.left = rcIcon.left - CX_BORDER*3;
rcIcon.right = rcIcon.left + m_szImage.cx + CX_BORDER;
//rcIcon.bottom = rcIcon.top + m_szImage.cy + CY_BORDER*2;
rcIcon.top = rcIcon.top - 5;
rcIcon.bottom = rcIcon.top + m_szImage.cy;
} // if
else rcIcon.SetRect(0, 0, 0, 0);
// Calculate rcText
if (lpLBData->nImage != -1)
{
rcText.left = rcIcon.right;
rcText.top = rcIcon.top + 8;
}
else
{
rcText.left = CX_BORDER;
rcText.top = rcIcon.top + 8;
}
// Draw the icon (if any)
if (m_pImageList)
OnDrawIcon(nIndex, &Dc, &Rect, &rcIcon,
lpLBData->nImage, FALSE, Selected);
CRect TheRect = Rect;
Dc.SetBkMode(TRANSPARENT);
CDC memdc;
memdc.CreateCompatibleDC(&Dc);
CFont *pFont = GetFont();
CFont *oldFont = Dc.SelectObject(pFont);
CBitmap *oldbmp = memdc.SelectObject(&m_Bmp);
Dc.BitBlt(TheRect.left,TheRect.top,TheRect.Width(),TheRect.Height(),&memdc,TheRect.left,TheRect.top,SRCCOPY);
CString Text;
GetText(nIndex,Text);
if (IsWindowEnabled())
{
if (Selected)
{
Dc.SetTextColor(m_SelColor);
}
else
{
Dc.SetTextColor(m_Color);
}
}
else
{
Dc.SetTextColor(RGB(140,140,140));
}
//Dc.DrawText(Text,TheRect,DT_LEFT|DT_EXPANDTABS|DT_NOPREFIX);
Dc.DrawText(Text,rcText,DT_LEFT);
Dc.SelectObject(oldFont);
memdc.SelectObject(oldbmp);
}
void CBitmapList::OnPaint()
{
CPaintDC dc(this); // device context for painting
CRect Rect;
GetClientRect(&Rect);
int Width = Rect.Width();
int Height = Rect.Height();
CDC MemDC;
MemDC.CreateCompatibleDC(&dc);
CBitmap MemBmp;
MemBmp.CreateCompatibleBitmap(&dc,Width,Height);
CBitmap *pOldMemBmp = MemDC.SelectObject(&MemBmp);
//我的对话框是不规则的一个BMP,m_Back是需要显示listbox的背景
CDC MemDC2;
MemDC2.CreateCompatibleDC(&dc);
CBitmap *pOldbmp = MemDC2.SelectObject(&m_Back);
MemDC.BitBlt(0,0,Width,Height,&MemDC2,0,0,SRCCOPY);
MemDC2.SelectObject(pOldbmp);
Rect.top = 0;
Rect.left = 0;
Rect.bottom = Rect.top + GetItemHeight(0);
Rect.right = Width;
int size = GetCount();
for (int i = GetTopIndex(); i < size && Rect.top <= Height;++i)
{
DrawItem(MemDC,i,Rect,GetSel(i));
Rect.OffsetRect(0,GetItemHeight(i));
}
dc.BitBlt(0,0,Width,Height,&MemDC,0,0,SRCCOPY);
m_SkinVerticleScrollbar.UpdateThumbPosition();
MemDC.SelectObject(pOldMemBmp);
}
void CBitmapList::DrawItem(CDC &Dc,int nIndex,CRect &Rect,BOOL Selected)
{
STRUCT_LBDATA* lpLBData = NULL;
CString strText;
if (nIndex == LB_ERR || nIndex >= GetCount())
return;
lpLBData = (STRUCT_LBDATA *)CListBox::GetItemDataPtr(nIndex);
if (lpLBData == NULL || lpLBData == (LPVOID)-1L) return;
CRect rcItem = Rect;
CRect rcIcon = Rect;
CRect rcText = Rect;
CRect rcCenteredText = Rect;
//在list item上画icon
// Calculate rcIcon
if (m_pImageList)
{
rcIcon.left = rcIcon.left - CX_BORDER*3;
rcIcon.right = rcIcon.left + m_szImage.cx + CX_BORDER;
//rcIcon.bottom = rcIcon.top + m_szImage.cy + CY_BORDER*2;
rcIcon.top = rcIcon.top - 5;
rcIcon.bottom = rcIcon.top + m_szImage.cy;
} // if
else rcIcon.SetRect(0, 0, 0, 0);
// Calculate rcText
if (lpLBData->nImage != -1)
{
rcText.left = rcIcon.right;
rcText.top = rcIcon.top + 8;
}
else
{
rcText.left = CX_BORDER;
rcText.top = rcIcon.top + 8;
}
// Draw the icon (if any)
if (m_pImageList)
OnDrawIcon(nIndex, &Dc, &Rect, &rcIcon,
lpLBData->nImage, FALSE, Selected);
CRect TheRect = Rect;
Dc.SetBkMode(TRANSPARENT);
CDC memdc;
memdc.CreateCompatibleDC(&Dc);
CFont *pFont = GetFont();
CFont *oldFont = Dc.SelectObject(pFont);
CBitmap *oldbmp = memdc.SelectObject(&m_Bmp);
Dc.BitBlt(TheRect.left,TheRect.top,TheRect.Width(),TheRect.Height(),&memdc,TheRect.left,TheRect.top,SRCCOPY);
CString Text;
GetText(nIndex,Text);
if (IsWindowEnabled())
{
if (Selected)
{
Dc.SetTextColor(m_SelColor);
}
else
{
Dc.SetTextColor(m_Color);
}
}
else
{
Dc.SetTextColor(RGB(140,140,140));
}
//Dc.DrawText(Text,TheRect,DT_LEFT|DT_EXPANDTABS|DT_NOPREFIX);
Dc.DrawText(Text,rcText,DT_LEFT);
Dc.SelectObject(oldFont);
memdc.SelectObject(oldbmp);
}
goodboyws 2005-10-31
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映射WM_ERASEBKGND
BOOL CMyListBox::OnEraseBkgnd(CDC* pDC)
{
// TODO: Add your message handler code here and/or call default
return FALSE;
}
DrawItem里用双缓冲
BOOL CMyListBox::OnEraseBkgnd(CDC* pDC)
{
// TODO: Add your message handler code here and/or call default
return FALSE;
}
DrawItem里用双缓冲
快乐鹦鹉 2005-10-31
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如何自绘的？
菜牛 2005-10-31
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我没用DrawItem
+++++++++++++++++++++++++++++++++++++++++++++++
那何必自绘ListBox，不如直接从CWnd继承算了。
+++++++++++++++++++++++++++++++++++++++++++++++
那何必自绘ListBox，不如直接从CWnd继承算了。
