一、关于CSplitterWnd类
我们在使用CuteFtp或者NetAnt等工具的时候,一般都会被其复杂的界面所吸引,在这些界面中窗口被分割为若干的区域,真正做到了窗口的任意分割。 那么我们自己如何创建类似的界面,也实现窗口的任意的分割呢 ?在VC6.0中这就需要使用到CSplitterWnd类。CSplitterWnd看上去像是一种特殊的框架窗口,每个窗口都被相同的或者不同的视图所填充。当窗口被切分后用户可以使用鼠标移动切分条来调整窗口的相对尺寸。虽然VC6.0支持从AppWizard中创建分割窗口,但是自动加入的分割条总是不能让我们满意,因此我们还是通过手工增加代码来熟悉这个类。
CSplitterWnd的构造函数主要包括下面三个。
BOOL Create(CWnd* pParentWnd,int nMaxRows,int nMaxCols,SIZE sizeMin,CCreateContext* pContext,DWORD dwStyle,UINT nID);
功能描述:该函数用来创建动态切分窗口。 参数含义:pParentWnd 切分窗口的父框架窗口。 nMaxRows,nMaxCols是创建的最大的列数和行数。 sizeMin是窗格的现实大小。 pContext 大多数情况下传给父窗口。 nID是字窗口的ID号.
BOOL CreateStatic(CWnd* pParentWnd,int nRows,int nCols,DWORD dwStyle,UINT nID)
功能描述:用来创建切分窗口。 参数含义同上。
BOOL CreateView (int row,int col,CruntimeClass* pViewClass,SIZE sizeinit,CcreateContext* pContext);
功能描述:为静态切分的窗口的网格填充视图。在将视图于切分窗口联系在一起的时候必 须先将切分窗口创建好。 DWORD dwCreateStyle = dwStyle & ~(WS_HSCROLL|WS_VSCROLL);
if (afxData.bWin4)
dwCreateStyle &= ~WS_BORDER; //create with the same wnd-class as MDI-Frame (no erase bkgnd)
if (!CreateEx(0, _afxWndMDIFrame, NULL, dwCreateStyle,
0, 0, 0, 0,pParentWnd->m_hWnd, (HMENU)nID, NULL))
return FALSE; // create invisible
m_wndSplitter.Create(this,2,2,CSize(100,100),pContext);
CCuteFTPView | |
CView2 | CView3 |
CView4 |
创建步骤:
▲ 在创建之前我们必须先用AppWizard生成单文档CuteFTP,生成的视类为 CCuteFTPView.同时在增加三个视类或者从视类继承而来的派生类CView2,CView3 CView4.
▲ 增加成员:
在Cmainfrm.h中我们将增加下面的代码:
CSplitterWnd wndSplitter1;
CSplitterWnd wndSplitter2;
▲ 重载CMainFrame::OnCreateClient()函数:
BOOL CMainFrame::OnCreateClient( LPCREATESTRUCT /*lpcs*/, CCreateContext* pContext)
{ //创建一个静态分栏窗口,分为三行一列
if(m_wndSplitter1.CreateStatic(this,3,1)==NULL)
return FALSE;
//将CCuteFTPView连接到0行0列窗格上
m_wndSplitter1.CreateView(0,0,RUNTIME_CLASS(CCuteFTPView),CSize(100,100), pContext);
m_wndSplitter1.CreateView(2,0,RUNTIME_CLASS(CView4),CSize(100,100),pContext);
//将CView4连接到0行2列
if(m_wndSplitter2.CreateStatic(&m_wndSplitter,1,2,WS_CHILD|WS_VISIBLE,
m_wndSplitter.IdFromRowCol(1, 0))==NULL)
return FALSE; //将第1行0列再分开1行2列
//将CView2类连接到第二个分栏对象的0行0列
m_wndSplitter2.CreateView(0,0,RUNTIME_CLASS(CView2),CSize(400,300),pContext);
//将CView3类连接到第二个分栏对象的0行1列
m_wndSplitter2.CreateView(0,1,RUNTIME_CLASS(CView3),CSize(400,300),pContext);
return TRUE;
}
2.3实现各个分割区域的通信 AddDocTemplate (new CMultiDocTemplate(IDR_VIEW2TYPE,
RUNTIME_CLASS(CMainDoc),
RUNTIME_CLASS(CMDIChildWnd),
RUNTIME_CLASS(CView2)));
我们现在来实现CCuteFTPView与CView2之间的通信。由于跟文档类相连的视图类 是不能安全的与除文档类之外的其余的视图类通信的。因此我们只能让他们都与文档 类通信。在文档中我们设置相应的指针以用来获的各个视图。我们重载 CCuteFTPView::OnOpenDocument()函数; CCuteFTPView* pCuteFTPView;
CView2* pView2;
POSITION pos;
CView* pView;
while(pos!=NULL)
{
pView=GetNextView(pos);
if(pView->IsKindOf(RUNTIME_CLASS(CCuteFTPView))==NULL)
pCuteFTPView=(CCuteFTPView*)pView;
else(pView->IsKindOf(RUNTIME_CLASS(CCuteFTPView))==NULL)
pView2=(CView2*)pView;
}
这样我们在文档类中就获的了跟它相连的所有的视图的指针。CCuteFTPDoc* pDoc=GetDocument();
CView2* pView2=pDoc->pView3;
pView3.DoIt();
CMainFrame* MainFrame=(CMainFrame*)this->GetParent()->GetParent();
CCuteFTPDoc* Doc=(CCuteFTPDoc*)MainFrame->GetActiveDocument();
if(Doc!=NULL) Doc->DoIt();
CCuteFTPDoc中的相应的处理函数DoIt()代码如下:
CView2* pView2;
POSITION pos;
CView* pView;
while(pos!=NULL)
{
pView=GetNextView(pos);
if(pView->IsKindOf(RUNTIME_CLASS(CView2))==NULL)
pView2=(CView2*)pView;
}
pView2->DoIt();
■无文档关联视图之间的通信CMainFrame* MainFrame=(CMainFrame*)this->GetParent()->GetParent();
CView4* View4=(CView4*)MainFrame->m_wndSplitter1.GetPane(2,0);
View4->DoIt();
virtual void StartTracking(int ht);
virtual CWnd* GetActivePane(int* pRow = NULL, int* pCol = NULL);
virtual void SetActivePane( int row, int col, CWnd* pWnd = NULL );
virtual BOOL OnCommand(WPARAM wParam, LPARAM lParam);
virtual BOOL OnNotify( WPARAM wParam, LPARAM lParam, LRESULT* pResult );
virtual BOOL OnWndMsg( UINT message, WPARAM wParam, LPARAM lParam, LRESULT* pResult );
具体实现如下,实现中我将给出原有代码的主要部分以及修改后的代码以作对比。enum HitTestValue
{
noHit = 0,//表示没有选中任何对象
vSplitterBox = 1,
hSplitterBox = 2,
bothSplitterBox = 3,
vSplitterBar1 = 101,//代表各个方向的水平分割条
vSplitterBar15 = 115,
hSplitterBar1 = 201,//代表垂直方向的各个分割条
hSplitterBar15 = 215,
splitterIntersection1 = 301,//代表各个交叉点
splitterIntersection225 = 525
};
CWnd* CxSplitterWnd::GetActivePane(int* pRow, int* pCol)
{
ASSERT_VALID(this);
//获得当前的获得焦点的窗口
//下面注释粗体的是原有的代码的主要部分。
// CWnd* pView = NULL;
//CFrameWnd* pFrameWnd = GetParentFrame();
//ASSERT_VALID(pFrameWnd);
//pView = pFrameWnd->GetActiveView();
//if (pView == NULL)
// pView = GetFocus();
CWnd* pView = GetFocus();
if (pView != NULL && !IsChildPane(pView, pRow, pCol))
pView = NULL;
return pView;
}
void CxSplitterWnd::SetActivePane( int row, int col, CWnd* pWnd)
{
CWnd* pPane = pWnd == NULL ? GetPane(row, col) : pWnd;
//下面加注释粗体的是原有代码的主要部分。
//FrameWnd* pFrameWnd = GetParentFrame();
//ASSERT_VALID(pFrameWnd);
//pFrameWnd->SetActiveView((CView*)pPane);
pPane->SetFocus();//修改后的语句
}
void CxSplitterWnd::StartTracking(int ht)
{
ASSERT_VALID(this);
if (ht == noHit)
return;
// GetHitRect will restrict ''''m_rectLimit'''' as appropriate
GetInsideRect(m_rectLimit);
if (ht >= splitterIntersection1 && ht <= splitterIntersection225)
{
// split two directions (two tracking rectangles)
int row = (ht - splitterIntersection1) / 15;
int col = (ht - splitterIntersection1) % 15;
GetHitRect(row + vSplitterBar1, m_rectTracker);
int yTrackOffset = m_ptTrackOffset.y;
m_bTracking2 = TRUE;
GetHitRect(col + hSplitterBar1, m_rectTracker2);
m_ptTrackOffset.y = yTrackOffset;
}
else if (ht == bothSplitterBox)
{
// hit on splitter boxes (for keyboard)
GetHitRect(vSplitterBox, m_rectTracker);
int yTrackOffset = m_ptTrackOffset.y;
m_bTracking2 = TRUE;
GetHitRect(hSplitterBox, m_rectTracker2);
m_ptTrackOffset.y = yTrackOffset; // center it
m_rectTracker.OffsetRect(0, m_rectLimit.Height()/2); m_rectTracker2.OffsetRect(m_rectLimit.Width()/2,
0);
}
else
{
// only hit one bar
GetHitRect(ht, m_rectTracker);
}
//下面加注释的将从程序中删去。
//CView* pView = (CView*)GetActivePane();
//if (pView != NULL && pView->IsKindOf(RUNTIME_CLASS(CView)))
//{
// ASSERT_VALID(pView);
// CFrameWnd* pFrameWnd = GetParentFrame();
//ASSERT_VALID(pFrameWnd);
//pView->OnActivateFrame(WA_INACTIVE, pFrameWnd);
// }
// steal focus and capture
SetCapture();
SetFocus();
// make sure no updates are pending
RedrawWindow(NULL, NULL, RDW_ALLCHILDREN | RDW_UPDATENOW);
// set tracking state and appropriate cursor
m_bTracking = TRUE;
OnInvertTracker(m_rectTracker);
if (m_bTracking2)
OnInvertTracker(m_rectTracker2);
m_htTrack = ht;
SetSplitCursor(ht);
}
BOOL CxSplitterWnd::OnCommand(WPARAM wParam, LPARAM lParam)
{
if (CWnd::OnCommand(wParam, lParam))
return TRUE;
//下面粗体的是原程序的语句
//return GetParentFrame()->SendMessage(WM_COMMAND, wParam, lParam);
return GetParent()->SendMessage(WM_COMMAND, wParam, lParam);
}
BOOL CxSplitterWnd::OnNotify( WPARAM wParam, LPARAM lParam, LRESULT* pResult )
{
if (CWnd::OnNotify(wParam, lParam, pResult))
return TRUE;
//下面粗体的是源程序的语句
//*pResult = GetParentFrame()->SendMessage(WM_NOTIFY, wParam, lParam);
*pResult = GetParent()->SendMessage(WM_NOTIFY, wParam, lParam);
return TRUE;
}
BOOL CxSplitterWnd::OnWndMsg(UINT message, WPARAM wParam, LPARAM lParam, LRESULT* pResult)
{
// The code line below is necessary if using CxSplitterWnd
in a regular dll
// AFX_MANAGE_STATE(AfxGetStaticModuleState());
return CWnd::OnWndMsg(message, wParam, lParam, pResult);
}
这样我们就可以在对话框中使用CxSplitterWnd类了。 void CXXSplitterWnd::OnLButtonDown(UINT nFlags,CPoint point)
{
CWnd::OnLButtonDown(nFlags,point);
}
其余的处理方法类似。 void CSplitterWndEx::OnDrawSplitter(CDC *pDC, ESplitType nType, const CRect &rectArg)
{
if(pDC==NULL)
{
RedrawWindow(rectArg,NULL,RDW_INVALIDATE|RDW_NOCHILDREN);
return;
}
ASSERT_VALID(pDC);
CRect rc=rectArg;
switch(nType)
{
case splitBorder:
//重画分割窗口边界,使之为红色
pDC->Draw3dRect(rc,RGB(255,0,0),RGB(255,0,0));
rc.InflateRect(-CX_BORDER,-CY_BORDER);
pDC->Draw3dRect(rc,RGB(255,0,0),RGB(255,0,0));
return;
case splitBox:
pDC->Draw3dRect(rc,RGB(0,0,0),RGB(0,0,0));
rc.InflateRect(-CX_BORDER,-CY_BORDER);
pDC->Draw3dRect(rc,RGB(0,0,0),RGB(0,0,0));
rc.InflateRect(-CX_BORDER,-CY_BORDER);
pDC->FillSolidRect(rc,RGB(0,0,0));
pDC->Draw3dRect(rc,RGB(0,0,0),RGB(0,0,0));
return;
case splitBar:
//重画分割条,使之为绿色
pDC->FillSolidRect(rc,RGB(255,255,255));
rc.InflateRect(-5,-5);
pDC->Draw3dRect(rc,RGB(255,0,0),RGB(255,0,0));
return;
default:
ASSERT(FALSE);
}
pDC->FillSolidRect(rc,RGB(0,0,255));
}
void CSplitterWndEx::OnInvertTracker(CRect &rect)
{
ASSERT_VALID(this);
ASSERT(!rect.IsRectEmpty());
ASSERT((GetStyle()&WS_CLIPCHILDREN)==0);
CRect rc=rect;
rc.InflateRect(2,2);
CDC* pDC=GetDC();
CBrush* pBrush=CDC::GetHalftoneBrush();
HBRUSH hOldBrush=NULL;
if(pBrush!=NULL) hOldBrush=(HBRUSH)SelectObject(pDC->m_hDC,pBrush->m_hObject);
pDC->PatBlt(rc.left,rc.top,rc.Width(),rc.Height(),BLACKNESS);
if(hOldBrush!=NULL)
SelectObject(pDC->m_hDC,hOldBrush);
ReleaseDC(pDC);
}
同样我们只要继承CSplitterWnd中的其余的一些虚拟方法就可以生成具有自己个性的分割窗口了。