BOOL CSelTrk::OnLButtonDown(POINT Point,UINT Flags,
CWnd* pWnd,double Zoom)
{
BOOL Changed = TrackRubberBand(Point,Flags,pWnd,Zoom);
if ( !Changed )
SetRect(CRect(0,0,0,0));
return(Changed);
}
BOOL CCutTrk::OnLButtonDown(POINT Point,UINT Flags,CWnd* pWnd,
double Zoom,int UpdateMode)
{
BOOL Changed = FALSE;
int HC = GetHitCode(Point,pWnd,Zoom);
if (HC == HC_Outside)
{
Update(UpdateMode,pWnd,Zoom);
Changed = TrackRubberBand(Point,Flags,pWnd,Zoom);
if (Changed)
Update(UpdateMode,pWnd,Zoom);
else
SetRect(CRect(0,0,0,0));
Changed = TRUE;
}
else
Changed = Track(Point,Flags,pWnd,Zoom,UpdateMode);
return(Changed);
}
int CTrackContrl::Track( const CPoint & point, UINT nFlags /* = 0 */,BOOL bTrackRubberBand /* = TRUE */ )
{
ASSERT(m_pwndParent != NULL);
CRect InitialBoundRect;
int pX, pY;
if(nFlags == MK_LBUTTON || nFlags== (MK_LBUTTON | MK_CONTROL)
|| nFlags==(MK_LBUTTON | MK_SHIFT))
{
for(int i=0;i<m_selTrackerAll.GetSize();i++)
{
int Hit=m_selTrackerAll[i]->HitTest(point);//判断用户是否抓住了一个handle
if(m_selTrackerAll[i]->GetCtrWindowIsable())
{
return TRACK_CTR_ABLE;
}
if(Hit!=CRectTracker::hitNothing)
{
//判断ctrl按下
if( ( nFlags & MK_CONTROL ) != 0 )
{
Toggle( m_selTrackerAll[i] );
return TRACK_CTR_CTRL;
}
//shift
if( ( nFlags & MK_SHIFT ) != 0 )
{
Select( m_selTrackerAll[i] );
return TRACK_CTR_SHIFT;
}
//没有ctrl shift时 这个控件被按下
if(!IsSelected(m_selTrackerAll[i]))//在选中数组检测这个控件是否已经选中了
DeSelectAll();//删除数组中所有选中
Select( m_selTrackerAll[i] );//选中当前控件
InitialBoundRect = GetBoundsRect();//获取没有移动前的CRect
///////把没有移动前的Rect赋给当前TrackContrl的Rect
m_rect.CopyRect( & InitialBoundRect );
if(Hit == CRectTracker::hitMiddle)//用户抓住中间参见MSDN CRectTracker::HitTest
{
CRectTracker::Track( m_pwndParent, point);//用户跟踪鼠标位置,并保存在m_rect中
pX = InitialBoundRect.left - m_rect.left;
pY = InitialBoundRect.top - m_rect.top;
// 把控件移动到鼠标位置
for( int j = 0; j < m_selectRectTracker.GetSize(); j++ )
{
//鼠标左键选中的控件
int Hit=m_selectRectTracker[j]->HitTest(point);
if(!m_selectRectTracker[j]->GetCtrWindowIsable() && Hit != CRectTracker::hitNothing)
{
m_pRightBnSelect = m_selectRectTracker[j];
}
/////////////////////////////////////////
//////////////////////////////移动
CRect rect;
rect.left = m_selectRectTracker[j]->m_rect.left - pX;
rect.right = m_selectRectTracker[j]->m_rect.right - pX;
rect.top = m_selectRectTracker[j]->m_rect.top - pY;
rect.bottom = m_selectRectTracker[j]->m_rect.bottom - pY;
//和最大矩形对比
ReAdjustMaxRect(rect,TRUE);
m_selectRectTracker[j]->SetRect(rect);
///////////////////////////////重画
ReDrawRect(m_selectRectTracker[j]->m_rect,m_selectRectTracker[j]->m_nHandleSize);
}
/////重画Old区域
ReDrawRect(InitialBoundRect,m_selTrackerAll[0]->m_nHandleSize);
}
else
{
/////////////////////////拉大，拉小
m_selTrackerAll[i]->Track( m_pwndParent, point );
/////////////////////////跟最大矩形做对比
ReAdjustMaxRect(m_selTrackerAll[i]->m_rect);
m_selTrackerAll[i]->SetRect(m_selTrackerAll[i]->m_rect);
///////重画
ReDrawRect(m_selTrackerAll[i]->m_rect,m_selTrackerAll[i]->m_nHandleSize);
ReDrawRect(InitialBoundRect,m_selTrackerAll[i]->m_nHandleSize);
}
return TRACK_CTR_MIDORHANDLE;
}
}
//用户鼠标没有抓住任何控件的handle
DeSelectAll();//删除保存的所有选中按钮
//参数bTrackRubberBand用于是否画虚线框区域,参见TrackRubberBand函数,
//即windows中用于选择区域的虚线框如在桌面上可以拖动一个虚线框选中n个图标
if(!bTrackRubberBand)
{
m_pwndParent->Invalidate();
return TRACK_CTR_RUBBERBAND;
}
TrackRubberBand( m_pwndParent, point );
// TrackRubberBand显示橡皮筋层（Windows中用于选择的虚线框），
// 该函数一般在处理WM_LBUTTONDOWN消息的函数中被调用，
// 函数中第一个参数是拥有橡皮筋长方形的窗体指针，第二个参数是点的坐标，
// 第三个参数用于控制是否允许反向选择，即从右下角到左上角进行选择。
m_rect.NormalizeRect();//一个正数的矩形，如果从下往上化矩形框，函数将交换top和bottom
//同理，从右忘左画时交换left和right
CRect temp;
for(int k=0;k<m_selTrackerAll.GetSize();k++)
{
//intersectRect计算两个矩形的交集
temp.IntersectRect(&m_rect,&m_selTrackerAll[k]->m_rect);
//交集区域矩形等于控件矩形，选中
// if(temp.EqualRect(&m_selTrackerAll[k]->m_rect))
// Select(m_selTrackerAll[k]);
if(!temp.IsRectEmpty())//如果交集区域不为空就选中
Select(m_selTrackerAll[k]);
}
return TRACK_CTR_LBUTTON;
}
else if(nFlags & MK_RBUTTON)
{
int flag = TRACK_CTR_OTHER;
for(int i=0;i<m_selTrackerAll.GetSize();i++)
{
int Hit=m_selTrackerAll[i]->HitTest(point);//判断用户是否抓住了一个handle
if(m_selTrackerAll[i]->GetCtrWindowIsable())
{
flag = TRACK_CTR_ABLE;
return flag;
}
if(Hit != CRectTracker::hitNothing)
{
if(!IsSelected(m_selTrackerAll[i]))//在选中数组检测这个控件是否已经选中了
DeSelectAll();//删除数组中所有选中
Select( m_selTrackerAll[i] );//选中当前控件
m_pRightBnSelect = m_selTrackerAll[i];
flag = TRACK_CTR_RBUTTON;
}
}
return flag;
}
else
{
return TRACK_CTR_OTHER;
}
}
