Technology of moving window

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Originally Posted by Hobson

And I am really pissed when some app ignores my settings and behaves other way (vide Winamp). Probably developers think that their app looks sooo coooool that it should be visible all the time. I wonder when they will start to set 'Always on top' style.

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Fully agree! :yellow handshoe: :)

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Originally Posted by　zerver
This is an OS setting: Display properties --> Effects --> "Show window contents while dragging".

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Quote:

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Originally Posted by　Hobson
I.e. Winamp draws whole window when dragging. This can be done in a few ways I guess, the one I found out is to create WM_MOVING message handler in following way:

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if you cancel the effect of "Show window contents while dragging", you will find that when you are dragging the window the WM_MOVING does not happen only the LMB is upped

i have an another question now.
why the function of IsWindowVisible always return zero?
That is a dialog create by MFC AppWizard
what should i do

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Originally Posted by blacksource

why the function of IsWindowVisible always return zero?

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How can we know, without seeing your code? Perhaps because that window is invisible? http://forums.codeguru.com/images/ie.../2006/06/1.gif

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Originally Posted by blacksource

That is a dialog create by MFC AppWizard

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Hm... Sounds suspiciously like the modal main dialog of a "dialog-based" project... So where are you calling IsWindowVisible()?

i call the function on CDockWndDlg::OnMove(int x, int y)

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Originally Posted by blacksource

i call the function on CDockWndDlg::OnMove(int x, int y)

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Hm... and that's all your code? I don't see any IsWindowVisible() call there.

sorry, i call the function here

Code:

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void CDockWndDlg::OnMove(int x, int y)
{
CDialog::OnMove(x, y);
 
// TODO: Add your message handler code here
RECT rect, rectMain;
 
// Get the rectangle of Docking Window
rect = (RECT)m_dlgDock.GetRect();
 
// Get the rectangle of Main Window
GetWindowRect( &rectMain );
 
// If Main Window is visible....beginning Docking
if( IsWindowVisible() )
{
 
        // Check the station of docking
        if( m_dlgDock.m_bDocked )
        {
                CRect rect;
 
        // remember the rectangle position of Docking Window
        rect = m_dlgDock.GetRect();
 
        rect.OffsetRect(m_rectMain.left - x, m_rectMain.top - y );
 
        // Move the Docking Window to Main Window
        // m_dlgDock.MoveWindow( &rect );
        }
}
GetWindowRect( &m_rectMain );
 
}

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if i call m_dlgDock.MoveWindow( &rect ) direct without checking there will be an error when the initial of dialog

Quote:

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Originally Posted by blacksource

if i call m_dlgDock.MoveWindow( &rect ) direct without checking there will be an error when the initial of dialog

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Okay, now I see what you are trying to do. The problem is that your OnMove() handler will be called once at the beginning during the window creation process - at that time, the window won't be created yet, and most of those calls will fail.

The correct way to handle this is not to test whether the window is visible, but whether it has a valid HWND attached to it - this is best done by testing m_hWnd against NULL.

yeah.....
thanks gstercken