How to drag the image window-CodePudding

MFC opened an image, how to use the mouse to drag the image?

CodePudding user response:

Response to a WM_MOUSEMOVE message, if the left key press, according to the drawing as the cursor position weight

CodePudding user response:

Graphics into the CStatic is:

 
Void CMyStatic: : onm ouseMove (UINT nFlags, CPoint point) 
{
//TODO: Add your message handler code here and/or call the default 
The static CPoint ptLast; 
//
If (MK_LBUTTON==nFlags) 
{
CRect rc; 
GetWindowRect (& amp; Rc); 
The ScreenToClient (& amp; Rc); 
MapWindowPoints (GetParent (), & amp; Rc); 
MoveWindow (rc) left + point. X-ray ptLast. (x), rc. The top + point. Y - ptLast. (y), rc. The Width (), rc, Height ()); 
} 
The else 
{
PtLast=point; 
CStatic: onm ouseMove (nFlags, point); 
} 
Invalidate (). 
}

CodePudding user response:

refer to the second floor schlafenhamster response:

graphics into the CStatic is:

 
Void CMyStatic: : onm ouseMove (UINT nFlags, CPoint point) 
{
//TODO: Add your message handler code here and/or call the default 
The static CPoint ptLast; 
//
If (MK_LBUTTON==nFlags) 
{
CRect rc; 
GetWindowRect (& amp; Rc); 
The ScreenToClient (& amp; Rc); 
MapWindowPoints (GetParent (), & amp; Rc); 
MoveWindow (rc) left + point. X-ray ptLast. (x), rc. The top + point. Y - ptLast. (y), rc. The Width (), rc, Height ()); 
} 
The else 
{
PtLast=point; 
CStatic: onm ouseMove (nFlags, point); 
} 
Invalidate (). 
}

Can I add some comments

CodePudding user response:

If (MK_LBUTTON==nFlags)
If the left key press
The else
{
PtLast=point; Save the current position