Northwoods Software Forums

GoDiagram : Printing nested GoSubGraph

Fri, 09 May 2008 09:57:47 +0000

Author: jaschwa
Subject: Printing nested GoSubGraph
Posted: 09�May�2008 at 9:57am

Thanks for the tips. At first I didn't get it, so I set this problem aside and twisted my brain around some WPF. When I came back to this, it made sense.

I had already sub-classed GoView, so once I overrode PrintDocumentSize and PrintDocumentTopLeft, everything worked beautifully. One of the other keys was overriding of GoSubGraph's CanPrint() so that the if PrintsChildren (a new property) is true, Paint gets called for its children even if the GoSubGraph itself is not Printable. Here's the code I came up with, for the benefit of others:

Code from form doing the printing:


private void Print()
{
    bool changedPrintable = false;
    goView1.PrintScale = goView1.DocScale;
    changedPrintable = SetPrintSelected();

    goView1.Print(); 
    // or for PrintPreview:
    //     goView1.PrintPreview(); 

    if (changedPrintable)
        ClearPrintSelected();
}

private bool SetPrintSelected()
{
    bool changedPrintable = false;
    if (goView1.Selection.Count > 0)
    {
        changedPrintable = true;
        foreach (GoObject obj in goView1.Document)
        {
            obj.Printable = goView1.Selection.Contains(obj);
            if (obj is MySubGraph)
            {
                var sgQuestion = (MySubGraph)obj;
                if (SetPrintSelectedChildren(sgQuestion))
                    sgQuestion.PrintsChildren = true;
            }
        }
    }
    return changedPrintable;
} 
private bool SetPrintSelectedChildren(MySubGraph)
{
    bool printable = sg.Printable;

    foreach (GoObject sgObj in sg)
    {
        if (goView1.Selection.Contains(sgObj))
            sgObj.Printable = true;
        else
            sgObj.Printable = sg.Printable;

        printable = printable || sgObj.Printable;

        if (sgObj is MySubGraph)
        {
            var sgQuestion = (MySubGraph)sgObj;
            if (SetPrintSelectedChildren(sgQuestion))
            {
                printable = true;
                sgQuestion.PrintsChildren = true;
            }
        }
    }
    return printable;
}

private void ClearPrintSelected()
{
    foreach (GoObject obj in goView1.Document)
    {
        obj.Printable = true;
        if (obj is GoSubGraph)
        {
            GoSubGraph sg = (GoSubGraph)obj;
            foreach (GoObject sgObj in sg)
            {
                sgObj.Printable = true;
                if (sgObj is GoSubGraph)
                    ClearPrintSelectedChildren((GoSubGraph)sgObj);
            }
        }
    }
    goView1.Document.ComputeBounds();
}

private void ClearPrintSelectedChildren(GoSubGraphsg)
{
    foreach (GoObject sgObj in sg)
    {
        sgObj.Printable = true;
        sg.PrintsChildren = false;
        if (sgObj is GoSubGraph)
        {
            ClearPrintSelectedChildren((GoSubGraph)sgObj);
        }
    }
}

Code from GoView sub-class:


public override SizeF PrintDocumentSize
{
    get
    {
        if (Selection.Count > 0)
            return GoDocument.ComputeBounds(Selection, this).Size;
        else
            return base.PrintDocumentSize;
    }
}

public override PointF PrintDocumentTopLeft
{
    get
    {
        if (Selection.Count > 0)
            return GoDocument.ComputeBounds(Selection, this).Location;
        else
            return base.PrintDocumentTopLeft;
    }
}

I also sub-classed GoSubGraph (referenced above as MySubGraph):


private bool _PrintsChildren = false;

public bool PrintsChildren
{
    get
    {
        return _PrintsChildren;
    }
    set
    {
        _PrintsChildren = value;
    }
}

public override bool CanPrint()
{
    return base.CanPrint() || PrintsChildren;
}

protected override void PaintDecoration(Graphics g, GoView view)
{
    if (Printable)
        base.PaintDecoration(g, view);
}

GoDiagram : Saving Global Settings of Layout in XML

Fri, 09 May 2008 09:34:44 +0000

Author: Jake
Subject: Saving Global Settings of Layout in XML
Posted: 09�May�2008 at 9:34am

The GraphDoc is handled if there is a GoXmlBindingTransformer for it.

But, since you're using the lower level interface, the transformer you set up isn't used because the GraphDoc isn't a part of the Objects collection. So, you don't need the GraphDocXml transformer, just override GenerateRootAttributes:

protected override void GenerateRootAttributes() {
GraphDoc doc = this.Objects as GraphDoc;
if (doc != null) {
    WriteAttrVal(�docname�, doc.Name);
    WriteAttrVal(�lastpartid�, doc.LastPartID);
    WriteAttrVal(�papercolor�, doc.PaperColor);
    � etc �
}
}

and similarly for the override of ConsumeRootAttributes.

GoDiagram : Support for Vista and Vista SP1

Fri, 09 May 2008 07:11:08 +0000

Author: Jake
Subject: Support for Vista and Vista SP1
Posted: 09�May�2008 at 7:11am

Yes. We made changes in 2.5.2 to support installation on Vista, but no changes have been needed for Vista since then.

GoDiagram : Support for Vista and Vista SP1

Fri, 09 May 2008 00:11:31 +0000

Author: sachin7ul
Subject: Support for Vista and Vista SP1
Posted: 09�May�2008 at 12:11am

We have upgraded to GoDiagram 3.0.2.2. I want to know if this version supports Vista fully?

GoDiagram : How to store background image into XML file

Thu, 08 May 2008 11:35:35 +0000

Author: Jake
Subject: How to store background image into XML file
Posted: 08�May�2008 at 11:35am

The code the way the sample is (and the way you have it) should work for ondisk files.

e.g.

GoDiagram : Box Resizing Problem

Thu, 08 May 2008 08:07:45 +0000

Author: Jake
Subject: Box Resizing Problem
Posted: 08�May�2008 at 8:07am

GoGroup.LayoutChildren reference says this:

Implementations of this method probably should not refer, directly or indirectly, to this group's GoObject.Bounds property. Instead, you should just position and size the children based on the bounds of the children (not this group's bounds), and let this group's bounds be determined by the union of the bounds of the children.
For groups that may have many children, overrides will often check the GoObject.Initializing flag. If true, this method usually does nothing; later when all the changes have been performed is that flag set to false and this method is called explicitly with a null argument.

so, I can't explain why the port is causing the problem, but I'd look first to the use of this.Bounds. Look at how BoxArea.cs in Demo1 works.

GoDiagram : Layout Problem - Stopping

Thu, 08 May 2008 07:59:54 +0000

Author: Jake
Subject: Layout Problem - Stopping
Posted: 08�May�2008 at 7:59am

GoView draws all contents... the OnPaint event is delivered from Windows to fix up invalidated parts of this view.

But, that shouldn't happen if your code is cranking away doing something... the OnPaint won't happen until your code returns control back to the app main loop.

So... I guess you could override Paint in your comment class and set a breakpoint there.

    public override void Paint(Graphics g, GoView view) {
      base.Paint(g, view);
    }

hint: breakpoints at Paint require the debugger and application to not cover each other, or you hit the breakpoint for Paint each time the debug window uncovers the app.

GoDiagram : Saving Global Settings of Layout in XML

Thu, 08 May 2008 07:35:13 +0000

Author: sudhanshu
Subject: Saving Global Settings of Layout in XML
Posted: 08�May�2008 at 7:35am

Dear,

I am using GoXmlTransformer facility to save and retrieve the objects of a graph doc like Node and Link. and they are coming perfect.

Now i want to save some global setting for GoDocument itself and i want to do it using GoXmlTransformer not GoXmlBindingTransformer.

For this i have created DocXml class. code is blow.

public class GraphDocXml : GoXmlTransformer

{

public GraphDocXml()

{

this.TransformerType = typeof(GraphDoc);

this.ElementName = "View";

}

public override void GenerateAttributes(object obj)

{

base.GenerateAttributes(obj);

GraphView gView = ((GraphDoc)obj).GetView;

WriteAttrVal("BackColor", gView.BackColor);

}

public override void ConsumeAttributes(Object obj)

{

base.ConsumeAttributes(obj);

GraphView gView = ((GraphDoc)obj).GetView;

gView.BackColor = ColorAttr("BackColor", gView.BackColor);

}

using this class i am trying to save GoView Background color. i have added the transformer as well. but when i Call the Generate of wrtitter it doesn't invoke the generateAttiribute of DocXMl class.

private void OpenXml(Stream stream)

{

this.StartTransaction();

this.Clear();

GoXmlReader reader = new GoXmlReader();

reader.AddTransformer(new GraphDocXml());

reader.AddTransformer(new GraphNodeXml());

reader.AddTransformer(new GraphLinkXml());

reader.RootObject = this;

reader.Consume(stream);

this.FinishTransaction("Loaded from file");

}

private string SaveXml(Stream stream)

{

GoXmlWriter writer = new GoXmlWriter();

writer.RootElementName = "Layout";

writer.AddTransformer(new GraphDocXml());

writer.AddTransformer(new GraphNodeXml());

writer.AddTransformer(new GraphLinkXml());

writer.Objects = this;

writer.Generate(stream);

return AppUtils.GetXmlText(stream);

}

it is urgent.

GoDiagram : How to store background image into XML file

Thu, 08 May 2008 01:06:57 +0000

Author: senthilaj
Subject: How to store background image into XML file
Posted: 08�May�2008 at 1:06am

Image is load from External files. For each Type of product get individual images.

GoDiagram : Box Resizing Problem

Wed, 07 May 2008 17:31:38 +0000

Author: huanyue
Subject: Box Resizing Problem
Posted: 07�May�2008 at 5:31pm

public override void LayoutChildren(GoObject childchanged)
{
    if (Initializing)
       return;

    if (_border != null && _topLeftLabel != null && _port != null)
    {
       _border.Bounds = this.Bounds;
       RectangleF rect = _border.Bounds;
       _topLeftLabel.SetSpotLocation(TopLeft, new PointF(rect.X+2, rect.Y+2));
       _port.Position = _topLeftLabel.Position;
    }
}

======================

class NodePort : GoPort
{
    private bool myKeepsLinksBetweenRemoved;

    public const int ChangedMaxLinks = LastChangedHint + 10011;
    public const int ChangedKeepsLinksWhenRemoved = LastChangedHint + 10012;

    public NodePort() : base()
    {
       Selectable = false;
       Movable = false;
       IsValidDuplicateLinks = false;
       Style = GoPortStyle.None;
       FromSpot = NoSpot;
       ToSpot = NoSpot;
       KeepsLinksBetweenRemoved = true;
    }

    public override void CopyObject(GoCopyDictionary env)
    {
       NodePort p = (NodePort)base.CopyObject(env);
       if (p != null)
         p.Brush = null;
       return p;
    }

    public override void ChangeValue(GoChangedEventArgs e, bool undo)
    {
       switch (e.SubHint)
       {
         case ChangedMaxLinks:
            return;
         case ChangedKeepsLinksWhenRemoved:
            this.KeepsLinksBetweenRemoved = (bool)e.GetValue(undo);
            return;
         default:
            base.ChangeValue(e, undo);
            return;
    }

    bool KeepsLinksBetweenRemoved
    {
       get
       {
         return myKeepsLinksBetweenRemoved;
       }
       set
       {
         bool old = myKeepsLinksBetweenRemoved;
         if (old != value)
         {
             myKeepsLinksBetweenRemoved = value;
             Changed(ChangedKeepsLinksWhenRemoved, 0, old, NullRect, 0, value, NullRect);
         }
       }
    }

    public override PointF GetLinkPointFromPoint(PointF p)
    {
       GoRectangle rect = new GoRectangle();
       rect.Size = this.ParentNode.Bounds.Size;
       rect.Location = this.ParentNode.Bounds.Location;

       PointF p1 = new PointF(0,0);
       rect.GetNearestIntersectionPoint(p, this.ParentNode.Center, out p1);

       return p1;
    }

    protected override void OnLayerChanged(GoLayer oldLayer,
        GoLayer newLayer, GoObject mainObj)
    {
       // Perform NOOP rather than call base method
    }
}