自定义对话框 splitter Wnd

下面的代码中， DC的画图坐标是屏幕坐标。当鼠标 按下,移动  时绘制的拖拽splitter是直接在屏幕上绘制的，坐标也是屏幕坐标。

 

其中涉及到画笔的异或操作，下面是测试代码：

 

 CRect lrect;
 lrect.left = lrect.top = 0;
 lrect.right = lrect.bottom = 100;
 CPen lPen(0, 5, RGB(255,0,0));
 CPen *loPen = dc.SelectObject( &lPen );

// 设置画笔的异或操作

 int loOop2= dc.SetROP2(R2_NOTXORPEN);

// ResultColr = OrigColr^CurPenColr; 

// 结果颜色为：原象素 异或 当前画笔颜色

dc.MoveTo(0,0);
 dc.LineTo(100, 100);
 
 Sleep(1000);

//恢复原象素

 dc.MoveTo(0,0);
 dc.LineTo(100, 100);

 

 dc.SetROP2(loOop2); 
 dc.SelectObject(loPen);

 

 

核心代码如下：

 

鼠标按下：

void CSplitterControl::OnLButtonDown(UINT nFlags, CPoint point) {CStatic::OnLButtonDown(nFlags, point);m_bIsPressed = TRUE;//捕获鼠标SetCapture();CRect rcWnd;GetWindowRect(rcWnd);if (m_nType == SPS_VERTICAL)m_nX = rcWnd.left + rcWnd.Width() / 2;//在竖直条中间elsem_nY = rcWnd.top + rcWnd.Height() / 2;// 在水平条中间if (m_nType == SPS_VERTICAL)m_nSavePos = m_nX;elsem_nSavePos = m_nY;// 在整个屏幕上绘制, 需要屏幕坐标CWindowDC dc(NULL);DrawLine(&dc, m_nX, m_nY);}

 

 

 

光标移动的操作：

void CSplitterControl::OnMouseMove(UINT nFlags, CPoint point) {if (m_bIsPressed){CWindowDC dc(NULL);DrawLine(&dc, m_nX, m_nY);CPoint pt = point;ClientToScreen(&pt);GetParent()->ScreenToClient(&pt); // 屏幕坐标转换为相对父窗口客户端坐标// 检查坐标是否超出范围if (pt.x < m_nMin)pt.x = m_nMin;if (pt.y < m_nMin)pt.y = m_nMin;if (pt.x > m_nMax)pt.x = m_nMax;if (pt.y > m_nMax)pt.y = m_nMax;// 转换到频道坐标GetParent()->ClientToScreen(&pt);m_nX = pt.x;m_nY = pt.y;DrawLine(&dc, m_nX, m_nY);}CStatic::OnMouseMove(nFlags, point);}

 

鼠标释放：

void CSplitterControl::OnLButtonUp(UINT nFlags, CPoint point) {if (m_bIsPressed){ClientToScreen(&point);CWindowDC dc(NULL);DrawLine(&dc, m_nX, m_nY);CPoint pt(m_nX, m_nY);m_bIsPressed = FALSE;CWnd *pOwner = GetOwner();if (pOwner && IsWindow(pOwner->m_hWnd)){CRect rc;int delta;pOwner->GetClientRect(rc);pOwner->ScreenToClient(&pt);MoveWindowTo(pt);if (m_nType == SPS_VERTICAL)delta = m_nX - m_nSavePos;elsedelta = m_nY - m_nSavePos;SPC_NMHDR nmsp;nmsp.hdr.hwndFrom = m_hWnd;nmsp.hdr.idFrom = GetDlgCtrlID();nmsp.hdr.code = SPN_SIZED;nmsp.delta = delta;// 通知父窗口调整各窗口的大小pOwner->SendMessage(WM_NOTIFY, nmsp.hdr.idFrom, (LPARAM)&nmsp);}}CStatic::OnLButtonUp(nFlags, point);// 释放鼠标捕获ReleaseCapture();}

 

 父窗口接收到splitter 改变通知：

 

if (message == WM_NOTIFY){if (wParam == IDC_SPLITTER1){SPC_NMHDR* pHdr = (SPC_NMHDR*) lParam;CSplitterControl::ChangeWidth(&m_wndType, pHdr->delta);CSplitterControl::ChangeWidth(&m_lstItem, -pHdr->delta, CW_RIGHTALIGN);CSplitterControl::ChangeWidth(&m_txtContent, -pHdr->delta, CW_RIGHTALIGN);CSplitterControl::ChangeWidth(&m_wndSplitter2, -pHdr->delta, CW_RIGHTALIGN);}}