高分求救矩形框的问题

Question

如果想用鼠标拉出来一个矩形框 
并且该矩形框画好后
能够用鼠标随意改变其大小和移动它到任意位置
请问如何实现阿？
最好能给我原码 万分感谢
回答后立刻节帖给分

Answer 1

void CPictureActiveCtrl::OnLButtonDown(UINT nFlags, CPoint point) 
{
// TODO: この位置にメッセージ ハンドラ用のコードを追加するかまたはデフォルトの処理を呼び出してください
StartPoint=point;
mousedown=TRUE;
CClientDC ddc(this);
// OnDraw(&ddc,&Clientrect,NULL);
OnResetState();
if(DectrionMove)
{

bPointmouse=TRUE;
oldselRect=CRect(0,0,0,0);
ddc.LPtoDP(oldselRect);
DrawRect.NormalizeRect();
oldselRect.NormalizeRect();
ddc.DrawDragRect(DrawRect,sz,oldselRect,sz ,&Drawbrush,NULL);
oldselRect=DrawRect;
bDrawed=TRUE;


}
else
{
bDrawed=FALSE;
bPointmouse=FALSE;
DectrionMove=FALSE; }


COleControl::OnLButtonDown(nFlags, point);
}void CPictureActiveCtrl::OnLButtonUp(UINT nFlags, CPoint point) 
{
mousedown=FALSE;
bPointmouse=FALSE;
DectrionMove=FALSE;
EndPoint=point;
CClientDC ddc(this);
/* CDC MemDC;
MemDC.CreateCompatibleDC(&ddc);  
MemDC.SelectObject(bitmap);
long clr1=RGB(255,255,255);
long color=MemDC.GetPixel(point.x ,point.y);
xPil=point.x;
ypil=point.y;
MemDC.DeleteDC();*/
// Scanpicture(color); SelRect.left=StartPoint.x;
SelRect.top=StartPoint.y;
SelRect.right=EndPoint.x;
SelRect.bottom=EndPoint.y;

if(!bDrawed)
{
oldselRect=CRect(0,0,0,0);
ddc.LPtoDP(oldselRect);
SelRect.NormalizeRect();
oldselRect.NormalizeRect();

ddc.DrawDragRect(SelRect,sz,oldselRect,sz ,&Drawbrush,NULL);
oldselRect=SelRect;
bDrawed=TRUE;
DrawRect=SelRect;
}
DrawDragPoint(&ddc,DrawRect);
COleControl::OnLButtonUp(nFlags, point);
}void CPictureActiveCtrl::OnMouseMove(UINT nFlags, CPoint point) 
{
// TODO: この位置にメッセージ ハンドラ用のコードを追加するかまたはデフォルトの処理を呼び出してください
CPoint testPoint;
testPoint.x=point.x;
testPoint.y=point.y;
if(!mousedown)
{
if(rect[1].PtInRect(testPoint))
{
dectrion=LEFTTOP;DectrionMove=1;
::SetCursor(AfxGetApp()->LoadStandardCursor(IDC_SIZENWSE   ));
}
else if(rect[2].PtInRect(testPoint))
{
dectrion=UP;DectrionMove=1;
::SetCursor(AfxGetApp()->LoadStandardCursor(IDC_SIZENS   ));
}
else if(rect[3].PtInRect(testPoint))
{
dectrion=RIGHTTOP;DectrionMove=1;
::SetCursor(AfxGetApp()->LoadStandardCursor(IDC_SIZENESW      ));
}
else if(rect[4].PtInRect(testPoint))
{
dectrion=RIGHT;DectrionMove=1;
::SetCursor(AfxGetApp()->LoadStandardCursor(IDC_SIZEWE      ));
}
else if(rect[5].PtInRect(testPoint))
{
dectrion=RIGHTB0TTOM;DectrionMove=1;
::SetCursor(AfxGetApp()->LoadStandardCursor(IDC_SIZENWSE   ));
}
else if(rect[6].PtInRect(testPoint))
{
dectrion=DOWN;DectrionMove=1;
::SetCursor(AfxGetApp()->LoadStandardCursor(IDC_SIZENS   ));
}
else if(rect[7].PtInRect(testPoint))
{
dectrion=LEFTBOTTOM;DectrionMove=1;
::SetCursor(AfxGetApp()->LoadStandardCursor(IDC_SIZENESW      ));
}
else if(rect[8].PtInRect(testPoint))
{
dectrion=LEFT;DectrionMove=1;
::SetCursor(AfxGetApp()->LoadStandardCursor(IDC_SIZEWE       ));
}
else
DectrionMove=0;
}
if(bDrawed && bPointmouse)
{

if(DectrionMove)
{
switch(dectrion)
{
case 1:
DrawRect.top=point.y; DrawRect.left=point.x;
break;
case 2:
//DrawRect=rectTemp;
DrawRect.top=point.y;  break;
case 3:
//DrawRect=rectTemp;
DrawRect.right=point.x;DrawRect.top=point.y;  break;
case 4:
//DrawRect=rectTemp;
DrawRect.right=point.x; break;
case 5:
//DrawRect=rectTemp;
DrawRect.bottom=point.y;DrawRect.right=point.x; break;
case 6:
//DrawRect=rectTemp;
DrawRect.bottom=point.y; break;
case 7:
//DrawRect=rectTemp;
DrawRect.left=point.x; DrawRect.bottom=point.y;  break;
case 8:
//DrawRect=rectTemp;
DrawRect.left=point.x; break;
default:

break;
}
}
else
{
DectrionMove=0;
holdCursor=::SetCursor(AfxGetApp()->LoadStandardCursor(IDC_CROSS));
DrawRect.bottom=point.y;
DrawRect.right=point.x;
}
CClientDC ddc(this);
ddc.LPtoDP(oldselRect);
DrawRect.NormalizeRect();
oldselRect.NormalizeRect();
ddc.DrawDragRect(DrawRect,sz,oldselRect,sz ,&Drawbrush,NULL);
oldselRect=DrawRect;
}
COleControl::OnMouseMove(nFlags, point);
}BOOL CPictureActiveCtrl::DrawDragPoint(CDC *cdc, CRect rectBox)
{
CBrush brush;
brush.CreateSolidBrush(RGB(255,0,0));
rect[1]=GetRect(rectBox.left,rectBox.top);
rect[2]=GetRect((rectBox.left+rectBox.right)/2,rectBox.top);
rect[3]=GetRect(rectBox.right,rectBox.top); rect[4]=GetRect(rectBox.right,(rectBox.top+rectBox.bottom)/2);
rect[5]=GetRect(rectBox.right,rectBox.bottom); rect[6]=GetRect((rectBox.left+rectBox.right)/2,rectBox.bottom);
rect[7]=GetRect(rectBox.left,rectBox.bottom);
rect[8]=GetRect(rectBox.left,(rectBox.top+rectBox.bottom)/2);

for(int i=1;i<9;i++)
{
cdc->FillRect(rect[i],&brush);
// MetaFileDC->FillRect(rect[i],&brush);
cdc->UpdateColors();
// MetaFileDC->UpdateColors();

}
return true;
}CRect CPictureActiveCtrl::GetRect(long x, long y)
{
CRect rect1;
rect1.bottom=y+2;  rect1.top=y-2;
rect1.left=x-2;    rect1.right=x+2;
return rect1;
}