TSimpleGraph

perahi · Member Joined: 02 Mar 2005 Posts: 6

Hi!
1. How can I get multiline text at de links between objects in TSimpleGraph?
2. And is it possible to get multiple text areas in one node?

Thanx
Perahi

Stefan · Posted: 03/03/05 11:03 Post subject:

Hi,

1. As far as I know, it is not possible.
2. See 1.

But these could be good requests for the ExtGraph project; visit:
http://sourceforge.net/projects/extgraph and
go to the "Request Feature" section on that site and describe your request.

Cheers,
Stefan

perahi · Member Joined: 02 Mar 2005 Posts: 6

thank you for your answer!
I have tried to modify the Demo, so that you can write mulitilinetext in the linkproperties.
But the outcome of this is two boxes between the lines, insted of lineshift.
I see theese boxes also when i rezise a node so that the text is to big to fit into the node.

Perahi

Stefan · Posted: 04/03/05 13:53 Post subject:

I don't know what you mean by

"But the outcome of this is two boxes between the lines, insted of lineshift.
I see theese boxes also when i rezise a node so that the text is to big to fit into the node."

Please explain?

perahi · Member Joined: 02 Mar 2005 Posts: 6

Sorry

Here is a screenshot....

Stefan · Posted: 04/03/05 15:14 Post subject:

Aha... those boxes!
That's one for the CR and one for the LF...

You've only changed the TEdit to a TMemo, which does indeed allow you to enter more lines but that doesn't mean the property it's setting and the drawing engine, drawing that property's value, know what to do with it.

In short, you / we'll need to update the part that draws the text you enter, so that it support multiple lines. As I said, you could fill in a Feature Request at SourceForge: go here
and click "Submit new" to create a new request.

Cheers,
Stefan

perahi · Member Joined: 02 Mar 2005 Posts: 6

ok...
Thank you for your answers

Perahi

Stefan · Posted: 04/03/05 16:33 Post subject:

Any time

kokkoras · Member Joined: 12 Mar 2005 Posts: 2

...by altering the code in the function TGraphLink.GetTextRegion.

DrawTextFlags control how the bounding box for the text is calculated. It is used later on in the call to DrawText method. This method does not draw the text actualy, because it uses the extra flag DT_CALCRECT which tells her not to draw but to calculate the bounding box (check DrawText in Win 32 Programmer's Reference for details on these flags).

I haven't try the above. But I came to this conclusion by playing with the TGraphNode.GetMaxTextRect function, to resolve the ... issue (truncated text at various zoom states with no obvious reason).

perahi · Member Joined: 02 Mar 2005 Posts: 6

Thx for your answer..
Did you mangage to solve the ... issue? Can you please show me how?

As far as I understand, the TGraphLink.GetTextRegion function supports multiline since the DT_SINGLELINE flag is not set. TGraphLink.DrawText uses the TextOut function, while TGraphNode.DrawText uses the Windows.DrawText without the DT_CALCRECT flag.
Isnt the TextOut function capable of printing multiline??

perahi

kokkoras · Member Joined: 12 Mar 2005 Posts: 2

perahi · Member Joined: 02 Mar 2005 Posts: 6

Thank you mr.

Yes this is possible. You just open the sourcecode in your project and add breakpoint as usual...

perahi