更简单更快速实现窗口拆分

最近，在开发飞鸽传书C/S版的即时通讯软件时，需要解决消息对话框中窗口拆分问题，一时间，一头雾水，无从入手。后来还是一步一步解决了这问题，现在就和大家说说我的解决方案。水平有限，请多指教。转载请注明出处：http://www.freeeim.com/

在网上，许多文章的窗口拆分实现方法是使用 CSplitWnd 类，的确，他可以解决许多功能，但是当你要自定义一些功能，或自绘窗口时，他的局限性就全部暴露出来了。废话太多了，就说我的方法吧：

我使用 CDialog 通过处理鼠标事件来处理窗口拆分，实现方法比较难说清楚，代码最好说明问题。

1.文件：csplitdlg.h

class CSplitDlg : public CDialog
{
// Construction
public:
 void SetTowWindow(CWnd *pWnd1, CWnd *pWnd2, DWORD dwLeftMin);
 BOOL m_bTracking;
 CBrush m_brBk1;
 CBrush m_brBk2;
 CBrush m_brBk3;
 BOOL m_bCaptured;
 CPoint m_ptDown;
 CWnd *m_wndTop;
 DWORD m_nLeftMin;
 CWnd *m_wndBottom;
 CSplitDlg(CWnd* pParent = NULL);   // standard constructor

// Dialog Data
 //{{AFX_DATA(CSplitDlg)
 enum { IDD = IDD_DIALOG4 };
  // NOTE: the ClassWizard will add data members here
 //}}AFX_DATA

// Overrides
 // ClassWizard generated virtual function overrides
 //{{AFX_VIRTUAL(CSplitDlg)
 protected:
 virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV support
 //}}AFX_VIRTUAL

// Implementation
protected:

 // Generated message map functions
 //{{AFX_MSG(CSplitDlg)
 afx_msg void OnMouseMove(UINT nFlags, CPoint point);
 afx_msg LRESULT OnMouseLeave(WPARAM wparam, LPARAM lparam);
 afx_msg void OnMouseHover(WPARAM wparam, LPARAM lparam) ;
 afx_msg HBRUSH OnCtlColor(CDC* pDC, CWnd* pWnd, UINT nCtlColor);
 afx_msg void OnLButtonDown(UINT nFlags, CPoint point);
 afx_msg void OnLButtonUp(UINT nFlags, CPoint point);
 virtual BOOL OnInitDialog();
 //}}AFX_MSG
 DECLARE_MESSAGE_MAP()
};

**********************************************************************************************************************
2.文件 csplitdlg.cpp

#include "stdafx.h"
#include "SplitDlg.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CSplitDlg dialog

CSplitDlg::CSplitDlg(CWnd* pParent /*=NULL*/)
 : CDialog(CSplitDlg::IDD, pParent)
{
 //{{AFX_DATA_INIT(CSplitDlg)
  // NOTE: the ClassWizard will add member initialization here
 //}}AFX_DATA_INIT
}

void CSplitDlg::DoDataExchange(CDataExchange* pDX)
{
 CDialog::DoDataExchange(pDX);
 //{{AFX_DATA_MAP(CSplitDlg)
  // NOTE: the ClassWizard will add DDX and DDV calls here
 //}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CSplitDlg, CDialog)
 //{{AFX_MSG_MAP(CSplitDlg)
 ON_WM_MOUSEMOVE()
 ON_MESSAGE(WM_MOUSELEAVE, OnMouseLeave)
 ON_MESSAGE(WM_MOUSEHOVER, OnMouseHover)
 ON_WM_CTLCOLOR()
 ON_WM_LBUTTONDOWN()
 ON_WM_LBUTTONUP()
 //}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CSplitDlg message handlers

void CSplitDlg::OnMouseMove(UINT nFlags, CPoint point)
{
 // TODO: Add your message handler code here and/or call default
 SetCursor(LoadCursor(NULL, IDC_SIZENS));
 GetParent()->ScreenToClient(&point);
 CPoint apt = point;
 ClientToScreen(&apt);

 if (!m_bTracking)
 {
  TRACKMOUSEEVENT tme;
  tme.cbSize = sizeof(tme);
  tme.hwndTrack = m_hWnd;
  tme.dwFlags = TME_LEAVE|TME_HOVER;
  tme.dwHoverTime = 1;
  m_bTracking = _TrackMouseEvent(&tme);
 }
 else
 {
  if (m_bCaptured)
  {
   // 中间分解线
   CRect rc;
   GetWindowRect(&rc);
   GetParent()->ScreenToClient(&rc);

   // 左侧窗口
   CRect rtTop;
   m_wndTop->GetWindowRect(&rtTop);
   GetParent()->ScreenToClient(&rtTop);

   // 右侧窗口
   CRect rtBottom;
   m_wndBottom->GetWindowRect(&rtBottom);
   GetParent()->ScreenToClient(&rtBottom);

   CRect rtParent;
   GetParent()->GetWindowRect(&rtParent);
   GetParent()->ScreenToClient(&rtParent);
   int nHalf = rtParent.Width()/2;

   apt.y -= m_ptDown.y;
   if (apt.y < (int)m_nLeftMin)
   {
    rtTop.bottom = m_nLeftMin;
    rtBottom.top = rc.Height() + m_nLeftMin;
    m_wndTop->MoveWindow(rtTop);
    m_wndBottom->MoveWindow(rtBottom);
    MoveWindow(rtTop.left, m_nLeftMin, rc.Width(), rc.Height());
  //  CString str;
  //  str.Format("apt.y < (int)m_nLeftMin %d, %d", apt.y, m_ptDown.y);
  //  GetParent()->SetWindowText(str);
   }
   else if (rtParent.bottom-apt.y-42 < 38)
   {
    rtTop.bottom = rtParent.bottom-42-rc.Height()-38;
    rtBottom.top =rtParent.bottom-42-38;
    m_wndTop->MoveWindow(rtTop);
    m_wndBottom->MoveWindow(rtBottom);
    MoveWindow(rc.left, rtTop.bottom, rc.Width(), rc.Height());
   // CString str;
   // str.Format("rtParent.bottom-apt.y-42 < 38");
   // GetParent()->SetWindowText(str);
   }
   else
   {
    rtTop.bottom = apt.y;
    rtBottom.top = apt.y + rc.Height();

    m_wndTop->MoveWindow(rtTop);
    m_wndBottom->MoveWindow(rtBottom);
    MoveWindow(rc.left, apt.y, rc.Width(), rc.Height());
   // CString str;
   // str.Format("y:%d, %d, %d, %d, %d, %d, %d", apt.y, rtParent.right, rtParent.bottom,
   //  rtBottom.Width(), rtBottom.Height(),
   //  rtBottom.right, rtBottom.bottom);
   // GetParent()->SetWindowText(str);
   }
  }
 }
 CDialog::OnMouseMove(nFlags, point);
}

void CSplitDlg::OnMouseHover(WPARAM wparam, LPARAM lparam)
{
 // TODO: Add your message handler code here and/or call default
// SetDlgItemText(IDC_STATIC, "hover");
 RedrawWindow();
}

LRESULT CSplitDlg::OnMouseLeave(WPARAM wparam, LPARAM lparam)
{
// SetDlgItemText(IDC_STATIC, "leave");
 m_bTracking = FALSE;
 RedrawWindow();
 return 0;
}

HBRUSH CSplitDlg::OnCtlColor(CDC* pDC, CWnd* pWnd, UINT nCtlColor)
{
 HBRUSH hbr = CDialog::OnCtlColor(pDC, pWnd, nCtlColor);
 
 // TODO: Change any attributes of the DC here
 switch(nCtlColor)
 {
 case CTLCOLOR_DLG:
  if (m_bTracking)
  {
   if (m_bCaptured)
    return (HBRUSH)m_brBk2.GetSafeHandle();
   else
    return (HBRUSH)m_brBk3.GetSafeHandle();
  }
  else
   return (HBRUSH)m_brBk1.GetSafeHandle();
 }
 // TODO: Return a different brush if the default is not desired
 return hbr;
}
/*
UINT CAaaaaaaaaDlg::OnNcHitTest(CPoint point)
{
 UINT nResult = CDialog::OnNcHitTest(point);
 return nResult  == HTCLIENT ? HTCAPTION : nResult;
}
*/

void CSplitDlg::OnLButtonDown(UINT nFlags, CPoint point)
{
 // TODO: Add your message handler code here and/or call default
 SetCursor(LoadCursor(NULL, IDC_SIZENS));
// SetCursor(LoadCursor(NULL, IDC_SIZEWE));
 if(!m_bCaptured)
 {
  m_bCaptured=true;
  RedrawWindow();
  SetCapture();
  m_ptDown.x = point.x;
  m_ptDown.y = point.y;
 // CRect rt;
 // GetWindowRect(&rt);
 // GetParent()->ScreenToClient(&rt);
 // m_ptDown=rt.TopLeft();
 }
 
// CDialog::OnLButtonDown(nFlags, point);
}

void CSplitDlg::OnLButtonUp(UINT nFlags, CPoint point)
{
 // TODO: Add your message handler code here and/or call default
 SetCursor(LoadCursor(NULL, IDC_SIZEWE));
 if(m_bCaptured)
 {
  m_bCaptured=false;
  RedrawWindow();
  ReleaseCapture();
 }

// CDialog::OnLButtonUp(nFlags, point);
}

BOOL CSplitDlg::OnInitDialog()
{
 CDialog::OnInitDialog();

 // TODO: Add extra initialization here
 m_brBk1.CreateSolidBrush(RGB(236, 243, 246));
 m_brBk2.CreateSolidBrush(RGB(200, 200, 200));
 m_brBk3.CreateSolidBrush(RGB(100, 100, 100));

 m_bCaptured = FALSE;
 m_bTracking = FALSE;
 return TRUE;  // return TRUE unless you set the focus to a control
               // EXCEPTION: OCX Property Pages should return FALSE
}

void CSplitDlg::SetTowWindow(CWnd *pWnd1, CWnd *pWnd2, DWORD dwLeftMin)
{
 m_wndTop = pWnd1;
 m_wndBottom = pWnd2;
 m_nLeftMin = dwLeftMin;
}

转载请注明出处：http://www.freeeim.com/