Problem with TrackPopupMenu/TPM_LEFTALIGN

Message Topic Search Topic Options Post Reply Create New Topic Printable Version Translate Topic

   I recently upgraded a legacy vb6 project from SkinFramework ActiveX Control 16.3.1 to 19.3.0 and Popup menu alignments started failing.  I am using the Windows TrackPopupMenu API to build a pop up menu and display it in the appropriate location in the application.
See the following simplified example.

Flags = TPM_RIGHTBUTTON + TPM_NONOTIFY + TPM_RETURNCMD

iMenu = TrackPopupMenu(hMenu, Flags + TPM_LEFTALIGN, p.x, p.y, 0, GetForegroundWindow(), 0)

iMenu = TrackPopupMenu(hMenu, Flags + TPM_CENTERALIGN, p.x, p.y, 0, GetForegroundWindow(), 0)

iMenu = TrackPopupMenu(hMenu, Flags + TPM_RIGHTALIGN, p.x, p.y, 0, GetForegroundWindow(), 0)

In this example, LEFTALIGN ignores the value in p.x and treats it as zero, basically putting it at the left-most position on the display.  The Center and Right align work properly.

I reproduced this in the SkinControls sample application.  Rolling back to 16.3.1 fixes the issue.  I reproduced the issue in version 17.3, 18.4, and 19.3.  I need to upgrade because of an apparrent bug in 16.3 that affects scroll bars on server 2016 that the newer versions fix.

Here's what happens with TPM_LEFTALIGN  (Incorrect behavior)

And here's what happens with TPM_CENTERALIGN (This is the correct behavior)

Note that changing the application from LEFT to CENTER is not a desirable workaround because it changes where the popup appears relative to the mouse cursor (left, center or right aligned based on the mouse cursor's location).

Can I get a fix expedited for this?

Thanks

Ron

[Edited to fix images]

Author	Message Topic Search Topic Options Post Reply Create New Topic Printable Version Translate Topic
rdefulio Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 03 October 2014 Location: United States Status: Offline Points: 4	Post Options Post Reply Quote rdefulio Report Post Thanks(0) Quote Reply Topic: Problem with TrackPopupMenu/TPM_LEFTALIGN Posted: 21 December 2020 at 5:51pm
	I recently upgraded a legacy vb6 project from SkinFramework ActiveX Control 16.3.1 to 19.3.0 and Popup menu alignments started failing. I am using the Windows TrackPopupMenu API to build a pop up menu and display it in the appropriate location in the application. See the following simplified example. Flags = TPM_RIGHTBUTTON + TPM_NONOTIFY + TPM_RETURNCMD iMenu = TrackPopupMenu(hMenu, Flags + TPM_LEFTALIGN, p.x, p.y, 0, GetForegroundWindow(), 0) iMenu = TrackPopupMenu(hMenu, Flags + TPM_CENTERALIGN, p.x, p.y, 0, GetForegroundWindow(), 0) iMenu = TrackPopupMenu(hMenu, Flags + TPM_RIGHTALIGN, p.x, p.y, 0, GetForegroundWindow(), 0) In this example, LEFTALIGN ignores the value in p.x and treats it as zero, basically putting it at the left-most position on the display. The Center and Right align work properly. I reproduced this in the SkinControls sample application. Rolling back to 16.3.1 fixes the issue. I reproduced the issue in version 17.3, 18.4, and 19.3. I need to upgrade because of an apparrent bug in 16.3 that affects scroll bars on server 2016 that the newer versions fix. Here's what happens with TPM_LEFTALIGN (Incorrect behavior) And here's what happens with TPM_CENTERALIGN (This is the correct behavior) Note that changing the application from LEFT to CENTER is not a desirable workaround because it changes where the popup appears relative to the mouse cursor (left, center or right aligned based on the mouse cursor's location). Can I get a fix expedited for this? Thanks Ron [Edited to fix images]