vc6.0不用鼠标拖动CSplitterWnd的分割条，用代码改变分割窗口

使用vc6.0。mfc单文档程序。

效果：初始时，有上下两个窗口，但只有下面的窗口显示；点击分割条，上窗口显示；再点击分割条，上窗口隐藏。

1)建立CSplitterWnd的派生类CMySptWnd。
class CMySptWnd : public CSplitterWnd
并定一个成员变量bool m_bIs;，
初始化为false

2)分割成上下两个窗口。

BOOL CMainFrame::OnCreateClient(LPCREATESTRUCT lpcs, CCreateContext* pContext)
{
if(m_wndSplitter.CreateStatic(this,2,1)==NULL) // CMySptWnd m_wndSplitter;
return FALSE;

m_wndSplitter.CreateView(0,0,RUNTIME_CLASS(CView11View),CSize(0,0), pContext);
m_wndSplitter.CreateView(1,0,RUNTIME_CLASS(CView11View),CSize(100,100),pContext);

return TRUE;
}

3)定义函数：(主要就是它)

void CMySptWnd::SetSpl(CPoint pt)
{
enum HitTestValue
{
noHit                   = 0,
vSplitterBox            = 1,
hSplitterBox            = 2,
bothSplitterBox         = 3,        // just for keyboard
vSplitterBar1           = 101,
vSplitterBar15          = 115,
hSplitterBar1           = 201,
hSplitterBar15          = 215,
splitterIntersection1   = 301,
splitterIntersection225 = 525
};
if (m_bTracking)
{
// move tracker to current cursor position

pt.Offset(m_ptTrackOffset); // pt is the upper right of hit detect
// limit the point to the valid split range
if (pt.y < m_rectLimit.top)
pt.y = m_rectLimit.top;
else if (pt.y > m_rectLimit.bottom)
pt.y = m_rectLimit.bottom;
if (pt.x < m_rectLimit.left)
pt.x = m_rectLimit.left;
else if (pt.x > m_rectLimit.right)
pt.x = m_rectLimit.right;

if (m_htTrack == vSplitterBox ||
m_htTrack >= vSplitterBar1 && m_htTrack <= vSplitterBar15)
{
if (m_rectTracker.top != pt.y)
{
OnInvertTracker(m_rectTracker);
m_rectTracker.OffsetRect(0, pt.y - m_rectTracker.top);
OnInvertTracker(m_rectTracker);
}
}
else if (m_htTrack == hSplitterBox ||
m_htTrack >= hSplitterBar1 && m_htTrack <= hSplitterBar15)
{
if (m_rectTracker.left != pt.x)
{
OnInvertTracker(m_rectTracker);
m_rectTracker.OffsetRect(pt.x - m_rectTracker.left, 0);
OnInvertTracker(m_rectTracker);
}
}
else if (m_htTrack == bothSplitterBox ||
(m_htTrack >= splitterIntersection1 &
m_htTrack <= splitterIntersection225))
{
if (m_rectTracker.top != pt.y)
{
OnInvertTracker(m_rectTracker);
m_rectTracker.OffsetRect(0, pt.y - m_rectTracker.top);
OnInvertTracker(m_rectTracker);
}
if (m_rectTracker2.left != pt.x)
{
OnInvertTracker(m_rectTracker2);
m_rectTracker2.OffsetRect(pt.x - m_rectTracker2.left, 0);
OnInvertTracker(m_rectTracker2);
}
}
}
else
{
// simply hit-test and set appropriate cursor

int ht = HitTest(pt);
SetSplitCursor(ht);
}
}

这段代码是主要是从WINSPLIT.CPP文件的CSplitterWnd::OnMouseMove函数中拷贝来的。WINSPLIT.CPP文件在安装目录的/VC98/MFC/SRC/中。

4)重载OnLButtonUp函数

void CMySptWnd::OnLButtonUp(UINT nFlags, CPoint point)
{
CRect rc;
GetWindowRect(&rc);
if(point.x>rc.left && point.x<rc.right)//判断鼠标是否点在分割条上
{

if(m_bIs==false)
{
SetSpl(CPoint(0,(rc.bottom-rc.top)/2));
m_bIs = !m_bIs;
}
else
{
SetSpl(CPoint(0,0));
m_bIs = !m_bIs;
}
}

CSplitterWnd::OnLButtonUp(nFlags, point);
}

代码的复用性比较差。如有问题请指正。