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Hot Topic (More than 10 Replies) From FlowChart.NET.dll to WebChart.NET.dll (Read 7510 times)
alesdario
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From FlowChart.NET.dll to WebChart.NET.dll
Sep 10th, 2007 at 5:33am
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Hi stoyo.

I created an Xml Schema of the workflow rapresented in a FlowChart with Xml.XmlWriter.
After, i create WebApplication for rapresent this Workflow. To do this i use MindFusion.WebChart.Xml.XmlReader class. Workflow will rapresented correctly, but all boxes lose their formatting: the icon have black backcolor and boxes' text is non at the same position i set previously.

Why?
  
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Stoyo
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Re: From FlowChart.NET.dll to WebChart.NET.dll
Reply #1 - Sep 10th, 2007 at 7:23am
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Hi Alesdario,

Have you enabled the XmlWriter.Options.WriteImages property?

Stoyan
  
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alesdario
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Re: From FlowChart.NET.dll to WebChart.NET.dll
Reply #2 - Sep 10th, 2007 at 7:47am
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Yes. I've enabled that.
I've checked and i notice that boxes lose only their formatting and icon are rapresented differently by old configuration (Icons'  background color is Transparent in the old configuration and black in the new configuration)

Tanks.
  
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Stoyo
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Re: From FlowChart.NET.dll to WebChart.NET.dll
Reply #3 - Sep 10th, 2007 at 8:08am
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What image format are you using? The .NET image encoders often require access to the original file or stream to preserve all of the image data. So when creating the diagram that you save with XmlWriter, try to keep the image files around, or do node close the stream from where you are loading the images.

Stoyan
  
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alesdario
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Re: From FlowChart.NET.dll to WebChart.NET.dll
Reply #4 - Sep 10th, 2007 at 8:32am
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I use *.ico images.

Tanks.
  
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alesdario
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Re: From FlowChart.NET.dll to WebChart.NET.dll
Reply #5 - Sep 10th, 2007 at 8:37am
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Smiley Smiley Smiley
Stoyo wrote on Sep 10th, 2007 at 8:08am:
do node close the stream from where you are loading the images


How can i do this?
  
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Stoyo
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Re: From FlowChart.NET.dll to WebChart.NET.dll
Reply #6 - Sep 10th, 2007 at 11:02am
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It depends. Where are you loading the icons from?
  
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alesdario
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Re: From FlowChart.NET.dll to WebChart.NET.dll
Reply #7 - Sep 10th, 2007 at 11:08am
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In the first diagram, the icon are loaded from a resources file. The icon of the second diagram are loaded from the xml.

If you think there is a simple road than mine write me!
  
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Stoyo
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Re: From FlowChart.NET.dll to WebChart.NET.dll
Reply #8 - Sep 10th, 2007 at 1:03pm
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If you are using ResourceManager.GetStream() and then loading an image using Image.FromStream(), then simply not calling stream.Close() is enough to have the image saved correctly later.

Stoyan
  
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alesdario
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Re: From FlowChart.NET.dll to WebChart.NET.dll
Reply #9 - Sep 10th, 2007 at 1:20pm
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I'm Sorry. Icon are not loaded from resource file but are stored in a ImageList. I didn't use any stream to load the Icon i link ti my Box... Cry
  
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alesdario
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Re: From FlowChart.NET.dll to WebChart.NET.dll
Reply #10 - Sep 10th, 2007 at 1:50pm
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Other then the problem of the Background' color of the icon, there is a other problem: when i create new FlowChart whit XmlReader class, all boxes lose their formatting....why?
  
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Stoyo
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Re: From FlowChart.NET.dll to WebChart.NET.dll
Reply #11 - Sep 10th, 2007 at 4:43pm
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It seems you can 't do anything about losing the transparent color when using an image list. Try calling ImageList.Images[0].Save(@"icon1.ico", ImageFormat.Icon) and you will see that the color is not preserved.

An advice in the Image.FromStream topic in MSDN states that "You must keep the stream open for the lifetime of the Image". The probable reason is to use the original data when saving the image, but apparently the image list does not stick to that advice.

As a workaround, you could save the image index in the ImageList as a Box.Tag, and after loading the flowchart from XML, reload the images according to the stored index.

What exactly is lost from the box formatting?

Stoyan
  
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alesdario
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Re: From FlowChart.NET.dll to WebChart.NET.dll
Reply #12 - Sep 11th, 2007 at 5:38am
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Box lose this formatting.
Code
Select All
ShapeTemplate newshape =  new ShapeTemplate(
ShapeTemplate.FromId("Rectangle").Outline,
null,
new ElementTemplate[]
   {
   new LineTemplate(0, 50, 100, 50),
   new LineTemplate(100,50,100,100),
   new LineTemplate(100, 100, 0, 100),
   new LineTemplate(0, 100, 0, 50)
   },
FillMode.Winding,   "test" );

newshape.ImageRectangle = new RectangleF(0, 0, 100, 50);
box.Style = BoxStyle.Shape;
box.Shape = newshape;
box.TextFormat.LineAlignment = StringAlignment.Center;
box.TextFormat.Alignment = StringAlignment.Center;
box.Resize(84,60);

  
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alesdario
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Re: From FlowChart.NET.dll to WebChart.NET.dll
Reply #13 - Sep 11th, 2007 at 5:44am
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Stoyo wrote on Sep 10th, 2007 at 4:43pm:
As a workaround, you could save the image index in the ImageList as a Box.Tag, and after loading the flowchart from XML, reload the images according to the stored index.


Your solution if perfect, but i can't use because in my flowchart there are some boxes that are Attached to an arrow. I use TAG for findind the correct box linked to an arrow (i set box' tag like arrow's tag). Is there another way to find the box attached to an arrows without using tag?
  
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Stoyo
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Re: From FlowChart.NET.dll to WebChart.NET.dll
Reply #14 - Sep 11th, 2007 at 7:46am
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Use the Arrow.SubordinateGroup.Boxes collection to get the boxes that are attached to an arrow.

The shape definition is not saved in the XML file, but only its id, so you must define the "test" shape in the server application too. Just copy & paste the "new ShapeTemplate" code there.

Stoyan
  
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