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Author Topic: How to prevent TPanel (used for context) from repaiting while resizing?  (Read 4198 times)

Pascal

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How to prevent TPanel (used for context) from repaiting while resizing?
« on: July 03, 2017, 01:55:08 pm »
I have a form with a panel which is used for a GL-Context (dglOpenGL).
The context is refreshed every 40 ms by a thread.
If i now resize the form, the GL-Context is hidden by the repainted Panel/Window.
How can i prevent this behaviour, so that the context is visible while resizing.

Using TOpenGLControl is not an option here as this doesn't seem to work with rendering in threads.

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laz trunk x64 - fpc trunk i386 (cross x64) - Windows 10 Pro x64 (21H2)

Pascal

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Re: How to prevent TPanel (used for context) from repaiting while resizing?
« Reply #1 on: July 03, 2017, 02:03:01 pm »
Quote from: Pascal on July 03, 2017, 01:55:08 pm
Using TOpenGLControl is not an option here as this doesn't seem to work with rendering in threads.

Well, in fact this was the solution! I used TOpenGLControl to create my context on. The context created by TOpenGLControl will not be used.
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laz trunk x64 - fpc trunk i386 (cross x64) - Windows 10 Pro x64 (21H2)

Thaddy

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Re: How to prevent TPanel (used for context) from repaiting while resizing?
« Reply #2 on: July 03, 2017, 04:29:33 pm »
Tcontrol.beginupdate and Tcontrol.endupdate is designed for that.
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If Europe sells their USA bonds the USD will collapse. Europe can affort that given average state debts. The USA can't affort that. Just an advice...
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