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RobGP
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Single long lines of text in boxes?
Sep 30th, 2005 at 10:45pm
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How can I make a single long line of text appear in a diagram box? It seems so simple but difficult. I can't seem to make it stretch to fit and turn off the auto-text-wrap feature at the same time. Can someone please post some code for setting up a simple diagram (completley programatically) with a single box with a large line of text in it which doesnt wrap?

Also, my diagrams are for display purposes only - how do I disable all the manual editing features?

Thanks!
  
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Stoyo
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Re: Single long lines of text in boxes?
Reply #1 - Oct 1st, 2005 at 12:49pm
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If what you need is to resize the box so all its text is on a single line, try this:

private void btnTextLine_Click(object sender, System.EventArgs e)
{
  Box b = fc.CreateBox(0, 0, 1, 1);
  b.Text = "a single longer line of text in the box";
  b.TextFormat.FormatFlags = StringFormatFlags.NoWrap;

  Graphics g = fc.CreateGraphics();
  g.PageUnit = fc.MeasureUnit;
  SizeF size = g.MeasureString(b.Text, b.Font, 10000, b.TextFormat);
  g.Dispose();

  b.BoundingRect = new RectangleF(b.BoundingRect.Location, size);
}

Set Behavior = bhDoNothing to ignore all mouse actions on the diagram items, which prevents modifying the items.

Stoyan
  
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Rob
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Re: Single long lines of text in boxes?
Reply #2 - Oct 1st, 2005 at 2:20pm
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Thats what I ended up doing, thanks, felt like a bit of a hack though.

Couple of other things,

I dont have a bhDoNothing in the EBehaviour enumeration, is it new or something?

In the documentation it says to set enabled to false to disable the user interaction - but it takes the scrollbars out too! Any way to avoid this?

Also, setting AutoSizeDoc to true doesn't seem to work properly, as it seems to underestimate the size of the document exponentially as more nodes are added (I created a two-tier tree diagram with 1 node connected to 100 children, only 10 or so are visible).

Is there a way to solve this?

Thanks for the help so far!
  
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RobGP
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Re: Single long lines of text in boxes?
Reply #3 - Oct 1st, 2005 at 2:27pm
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"(EBehavior)0" worked in place of bhDoNothing, thanks.

Still wondering about the AutoSize though..?
  
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Stoyo
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Re: Single long lines of text in boxes?
Reply #4 - Oct 1st, 2005 at 3:25pm
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bhDoNothing was added in version 3.2, so if you don't have it, your FlowChart.NET version is older than 3.2. (EBehavior)0 == bhModify, which allows selecting and moving the diagram items, which is somewhat different than DoNothing.

You are right about Enabled, I guess the flowchart should allow scrolling even when not Enabled; will pass that to the developers.

I can't find anything wrong with AutoSize, could you save your diagram in a file and send it to our support address at mindfusion.org ?

Stoyan
  
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RobGP
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Re: Single long lines of text in boxes?
Reply #5 - Oct 1st, 2005 at 3:47pm
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Ah, I had set all the items to Locked = true, so I guess thats why it appeared to work ok.

Thanks, I'll send it, is there any chance you could check it out personally? You seem to know whats what with this control. I'll try upgrading the library too.

Thanks a lot!
  
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RobGP
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Re: Single long lines of text in boxes?
Reply #6 - Oct 1st, 2005 at 4:07pm
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Emailed - I found that selecting the arrows by dragging a box over them seems to force the flowchart ot recalculate the document area correctly. Is this something to do with creating the nodes programatically?
  
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RobGP
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Re: Single long lines of text in boxes?
Reply #7 - Oct 1st, 2005 at 4:28pm
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This works for me for now...

[code]float max_x = System.Single.MinValue;
float max_y = System.Single.MinValue;
foreach(Box bo in flow.Boxes)
{
max_x = Math.Max(max_x, bo.BoundingRect.X + bo.BoundingRect.Width);
max_y = Math.Max(max_y, bo.BoundingRect.Y + bo.BoundingRect.Height);
}
flow.DocExtents = new RectangleF(0, 0, max_x + 20, max_y + 20);[/code]
  
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Stoyo
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Re: Single long lines of text in boxes?
Reply #8 - Oct 1st, 2005 at 4:28pm
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One thing that might cause the problem is that AutoSizeDoc works only for users actions, e.g. the user drawing a new item or moving items around. If you need to resize the document after creating the tree programmatically, try setting a larger DocExtents or call the FitDocToObjects method.

Stoyan
  
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Re: Single long lines of text in boxes?
Reply #9 - Oct 1st, 2005 at 4:32pm
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Ok it seems we are posting at the same time. So after creating the tree programmatically, call the FitDocToObjects method which does the same as what your code above does. AutoDizeDoc resizes the document only after users actions, because it could slow the things down to recalculate a new bounding rectange, e.g. when you create a lot of items in a loop.

Stoyan
  
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