[HeDiBo]

Putting Application.ProcessMessages inside the OnPaint event of a form will hang the application. See [attachment=3687:AuSync.rar]

[HeDiBo]

This problem has more ramifications: if during the paint event, a dialog is created, that dialog is not shown

#41500

[HeDiBo]

I think there is more to it. I have removed the Application.ProcessMessages and the OnPaint event. Now, many times, when I start the application it does not show the initial screen and appears to be hanging (at least in the debugger of the Delphi development environment). Only a process reset and restart will fix it, albeit a few restarts may be needed.
Debugging reveals the application is looping in the windows message retrieval loop. In other words: some needed message has not arrived.
I consider this a serious bug

#41520

[HeDiBo]

Serge, Did you have a chance to look at this one?

[Support]

Hello
I'm sorry for delay, all topics are answered in order from bottom (from old topics) to top of the list…
Cause of your problem in a form animation. Set sSkinManager1.AnimEffects.FormShow.Active to False and looping will not be occured in this case.

[HeDiBo]

Is this the solution? Or is it a bug (I would say it's a bug)

#41554

[HeDiBo]

QUOTE (HeDiBo @ Jan 28 2010, 05:13 PM)

Is this the solution? Or is it a bug (I would say it's a bug) <img src="style_emoticons//happy.gif” style=”vertical-align:middle” emoid=”^_^” border=”0″ alt=”happy.gif” />

In the new release (6.54), this bug has become horrible. I cannot debug my project anymore! It simply hangs on startup. I have set the sSkinManager1.AnimEffects.FormShow.Active to False. It doesn't help.

It appears to have to do with a form that's autocreated in the DPR file. If I create that form dynamically in the main form there's no problem.
The form in question contains among others a custom form resizer, that resizes the form and all its controls dynamically upon request. The resize operation is not done though; only the current size is saved at the form create time.
This is the open source form resizer: [attachment=3726:EasySize.rar]
HELP <img src="style_emoticons//huh.gif” style=”vertical-align:middle” emoid=”:huh:” border=”0″ alt=”huh.gif” />

[Support]

Hello

In the v6.54 the problem with OnPaint must be solved, your demo was tested in several Delphi versions and haven't the problem now (animation state is not important now).
I have installed TFormResizer and check it too, but can't receive an issue. How you are using this component? Could you help me to reproduce the problem?

[HeDiBo]

QUOTE (Support @ Feb 2 2010, 08:19 AM) <{POST_SNAPBACK}>

I have installed TFormResizer and check it too, but can't receive an issue. How you are using this component? Could you help me to reproduce the problem?

Here is a test application that hangs when started (with Run) from the IDE of Delphi 7.

I think the problem is more in another component: AuAniBmp. If I remove that one from the Aura_messager form the problem disappears.
So, I've included that component. And the ThreadedTimer it uses. I think it's complete now, but if you miss something please let me know.

Remember, the problem only appears if you run the application from the IDE under the Delphi debugger. Not if you start it stand-alone.

[attachment=3732:AppHang.rar]

[Support]

Thank you.
What is TBCBitmap? (abort_icon: TBCBitmap;)

[HeDiBo]

QUOTE (Support @ Feb 2 2010, 12:29 PM) <{POST_SNAPBACK}>

Thank you.
What is TBCBitmap? (abort_icon: TBCBitmap;)

Don't worry, just replace it with a standard bitmap.

[HeDiBo]

I'm getting a bit nearer to the problem.
If you place an extra statement in the DPR file like this:

SetProcessAffinityMask(GetCurrentProcess, 1);

and add a

use Windows,

to the top, the problem goes away.
This is a problem occurring with hyperthreaded CPU's and Delphi 7.

So, unless you have a hyperthreaded CPU, you cannot reproduce it!

Now that I found it, I don't think AlphaControls is to blame. Just because it incurs extra processing this old bug resurfaces.

[HeDiBo]

Unfortunately, despite all measures I took, the program still appears to be hanging sometimes at start-up.

[Author]

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