Scrolling menu doesn't work!

 

I uploaded an avi. You may need the camtasia codec extension for Windows Media player to work. This seems to depend on the exact layout of the menus.

 

One thing I noticed was different between the sample and our popup is the items on our popup have multiple lines of text on some of the items. I tried modifying the sample by adding elements to the main menu and then to one of the popups. On the popup items I lengthened the text. But two things happened. First the popup stretched way out (ours seems to be a fixed length and that may be the key). Second, since the popup kept streching on the sample I added some bigger strings so that the popup finally wrapped some of the text and one of my biggest strings took enough space that two lines of text wasn't enough. The thrid line was clipped off. Still it did not repro.

 

I am guessing that our layout will have to be duplicated exactly. But I don't know what all is involved on creating the system menu. Especially making the popup have a maximum/fixed width as I don't work on the code involved in laying out our UI.

 

I was hoping the avi file might give you some clues as to what may be happening. Is there any particular place I can set a breakpoint in the CJ source code so that after I scroll and do the mouse down I can step thru the code and see what causes the menu to move during the mouse event? That seems to be key. In my testing I don't always even see the menu move. It is almost as if the exact mouse point has an effect.

 

Alternatively if I can turn off the scroll feature to go back to what the previous versions did our product design group may be able to live with that. I'd rather give a shot at debugging in the CJ code first if you can direct me where to start.

 

What I have found is that there is a disconnect between the control found in OnLButtonDown and OnLButtonUp. Since the control is on a popup, CXTPControlButton::OnClick does nothing. That call comes via CXTPCommandBar::OnLButtonDown.

 

In CXTPCommandBar::OnLbuttonDown, I always find the control returned from the first line (m_pControls->HitTest) is the control I am over when I click the mouse down. But as I noted, the OnClick routine does not start the command.

 

If I break in CXTPCommandBar::OnLButtonUp, I find that the control returned can be a different control from the one I click on. I see that when I mouse down, the popup redisplays and when I let the mouse up, the control under the mouse can be a different contro (due to the scroll)l.

 

I have been unable to determine when the display changes. I have a lot of problems with breakpoints as when one is tripped, the popup decides to go away. So I only get one breakpoint shot at a time trying to find the cause.

 

I have also found that we have a number of items on the popup that are not visible. These are not the itmes made non-visible because they have scrolled out of sight. Perhaps this is the difference between the sample and our app.

 

Since breaking at OnRecalclayout did not work, how about telling me where the "bottom scroll arrow" is displayed. I see that when I scroll down the arrow undisplays. Then when I mouse down over a control I see a scroll up occurs and the bottom scroll arrow is redisplayed. I need to set a break when the scroll up occurs or the bottom scroll arrow is displayed. Perhaps that will lead me to find the issue. The event sequence is 1) MouseDown 2) Popup scrolls 3) MouseUp.

 

By the way, I did find that if I mouse down and don't mouse up before the window scrolls again, if I hold the mouse down, move over the bottom scroll arrow and let the controls move and then move right back where I did the mouse down and then let the mouse up, the correct control is found.