element has no parent window

[MHotz]

Hi!

I am trying to migrate my project from TeeChart Pro 2012 to Tee Chart Pro 2014. But at a specific position I receive the error "element has no parent window". The Code that raises the exception is:

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    MyChart.SaveToMetafileEnh('C:\Temp\Test.emf');

Prior to that I created the Chart with the following statement:

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    MyChart := TChart.Create(nil);

So ok the chart definetly has no owner. But all that works fine with 2012 but not with your latest version. And I cannot assign an owner because I don't have one!

I have the Pro version with source code.

Thanks for your help in advance!

Regards
Markus

[Yeray]

Hi Markus,

Take a look at the example attached. It seems to work fine for me here with v2014.10.

testParentEMF.zip

(5.7 KiB) Downloaded 480 times

Could you please give it a try and modify it so we can reproduce the problem here?

Thanks in advance.

[MHotz]

Hi Yeray!

Well your right in principal your code works. So I scanned my project deeper and found that it has something to do with that statement:

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MyChart.TeeCreateBitmap;

If I call that method before I call

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MyChart.SaveToMetafileEnh('C:\Temp\Test.emf');

the first call itself fails with "element has no parent window".

So I commented that first call out and now it works! I don't know why I call "TeeCreateBitmap" before but maybe it was needed in a former version of TChart. I hope I won't get an error at a currently unknown and unexpectable position in my code. But for now I am glad!

So thank's for your prompt support. Even if it doesn't solve my problem directly it showed me that I had to make a deeper look in my code.

Regards
Markus

[Yeray]

Hi Markus,

Well your right in principal your code works. So I scanned my project deeper and found that it has something to do with that statement:

Code: Select all

MyChart.TeeCreateBitmap;

If I call that method before I call

Code: Select all

MyChart.SaveToMetafileEnh('C:\Temp\Test.emf');

the first call itself fails with "element has no parent window".

Strange. I've added the TeeCreateBitmap call before the SaveToMetafileEnh in the project I attached above and I still don't see any error with TeeChart v2014.10. I'm testing it with Delphi 7, what IDE are you running?

So I commented that first call out and now it works! I don't know why I call "TeeCreateBitmap" before but maybe it was needed in a former version of TChart. I hope I won't get an error at a currently unknown and unexpectable position in my code. But for now I am glad!

So thank's for your prompt support. Even if it doesn't solve my problem directly it showed me that I had to make a deeper look in my code.

That's good! I'm glad to be helpful!