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Normal Topic overview creation in delphi (Read 4941 times)
unisnk
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overview creation in delphi
Sep 8th, 2008 at 8:12am
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Hi, I'm still testing the control. I want to create an overview window clicking on a button.

I use this simple code:
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procedure Tfrm_Main.btnOverviewClick(Sender: TObject);
var ov : overview;
begin
  ov.Document := FlowChart1.DefaultInterface;
end;


but it doesn't work: I'm getting an Access Violation error via runtime. How can I fix it?
  
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Stoyo
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Re: overview creation in delphi
Reply #1 - Sep 8th, 2008 at 8:31am
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Hi,

You will have to create an Overview instance and assign it to the 'ov' variable before setting ov.Document.

I hope that helps,
Stoyan
  
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unisnk
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Re: overview creation in delphi
Reply #2 - Sep 8th, 2008 at 8:46am
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i modified code in this way:

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procedure Tfrm_Main.btnOverviewClick(Sender: TObject);
var tov : toverview;
ov: ioverview;
begin
 tov := toverview.create(self);
 ov := tov.DefaultInterface;
 ov.Document := FlowChart1.DefaultInterface;
end;


no more access violation errors, but overview window is still not shown. Where was I wrong?
  
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Stoyo
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Re: overview creation in delphi
Reply #3 - Sep 8th, 2008 at 8:51am
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I suppose you should add 'ov' to a form now. I don't how that can be done programmatically in Delphi.
  
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unisnk
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Re: overview creation in delphi
Reply #4 - Sep 8th, 2008 at 2:53pm
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nothing to do for now... I'll do some other tests.. I would be great if I could create that window.

Thank you for now, I'll keep you informed on my progress.
  
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unisnk
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Re: overview creation in delphi
Reply #5 - Sep 11th, 2008 at 10:02am
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update. I solved the problem simply dropping in another form the Toverview object and then assigning it to the ControlInterface property of  flowchart object.

bye
  
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Stuart
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Re: overview creation in delphi
Reply #6 - Sep 11th, 2008 at 10:15am
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I was just about to post to say something ver similar.

In my case I have a form with a number of controls. I simply added the tOverview, set the .Document property and bingo! Job done.
  
-- &&Stuart
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unisnk
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Re: overview creation in delphi
Reply #7 - Sep 15th, 2008 at 9:14am
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very good, probably developers can do something to make easier the creation of an overview  Grin

byebye
  
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