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Normal Topic how to fill the Arrow Tag (Read 2589 times)
Dunkelelb
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how to fill the Arrow Tag
May 30th, 2007 at 5:13am
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Hello,

Potentail I'd like to search for Arrows.
therefor I got to fill the Arrow Tag. How?

at first I want to know if that tables exist
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if ((flowChart6.FindTable(_hilfsstring3) != null) && (flowChart6.FindTable(_hilfsstring4)) != null)

--> now I'd like to fill the TableTags (_hilfsstring3 and _hilfsstring4) in the tag of the new Arrow
HOW?

--> creating the Arrow
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flowChart6.CreateArrow(flowChart6.FindTable(_hilfsstring3), flowChart6.FindTable(_hilfsstring4));
  
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Stoyo
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Re: how to fill the Arrow Tag
Reply #1 - May 30th, 2007 at 6:02am
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Hi,

You can create a new class, e.g. ArrowTag, with two string members and use its instances as arrow tags. When creating an arrow, assign an ArrowTag object to the arrow.Tag and set its two members. If you want to use FindArrow(), implement the ArrowTag.Equals method, and you will be able to search for tags like this:

fc.FindArrow(new ArrowTag(string1, string2));

I hope that helps,
Stoyan
  
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Dunkelelb
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Re: how to fill the Arrow Tag
Reply #2 - May 30th, 2007 at 8:37am
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hello,

thanks for your suggestion.
But I don't understand that complete.
(exist  there any sample for that?)


meanwhile I solved it another way.
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flowChart6.CreateArrow(flowChart6.FindTable(_hilfsstring3), flowChart6.FindTable(_hilfsstring4)).Tag = _hilfsstring3 +";"+ _hilfsstring4


or better
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_hilfstable = new Table[2];
				    _hilfstable[0] = flowChart6.FindTable(_hilfsstring3);
				    _hilfstable[1] = flowChart6.FindTable(_hilfsstring4);
arrow6[i] = flowChart6.CreateArrow(_hilfstable[0], _hilfstable[1]);
//arrow is defined private Arrow[]  arrow6 = new Arrow[..];
arrow6[i].Tag = _hilfsstring3 +";"+ _hilfsstring4;
  
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Stoyo
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Re: how to fill the Arrow Tag
Reply #3 - May 30th, 2007 at 9:09am
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Hello,

FindArrow works by calling the Object.Equals method, comparing the items tags with the value passed as argument to FindArrow. So if you use objects from a custom class as tags, you must override Equals() and implement the equality logic by comparing the class fields.

Using concatenated strings is not a bad solution either, so use whatever method you prefer  Smiley

Stoyan
  
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Dunkelelb
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Re: how to fill the Arrow Tag
Reply #4 - May 30th, 2007 at 12:41pm
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Thanks Roll Eyes

but now I think your way could  be the better one.

Now I want to search for the connections of a table
--> so I got to search the Arrow (there I only know the half of the Tag)

for that concatenated strings don t seem to be the best choice
  
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Stoyo
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Re: how to fill the Arrow Tag
Reply #5 - May 30th, 2007 at 12:50pm
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If you need to find all arrows connected to a table, better iterate over the IncomingArrows or OutgoingArrows collections of the table or its rows.  That should be faster than using FindArrow.

Stoyan
  
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