Northwoods Software Forums http://www.nwoods.com/forum This is an XML content feed of; Northwoods Software Forums : Last 10 Posts Thu, 11 Mar 2010 10:41:39 +0000 Thu, 11 Mar 2010 10:36:02 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 8.05 30 www.nwoods.com/forum/RSS_topic_feed.asp Northwoods Software Forums http://www.nwoods.com/forum/../images/godiagram%20logostripe.gif http://www.nwoods.com/forum GoXam : OnNodeAdded / OnModelChanged http://www.nwoods.com/forum/forum_posts.asp?TID=3263&PID=13379#13379 Author: walter
Subject: OnNodeAdded / OnModelChanged
Posted: 11 March 2010 at 10:36am

I think your "internal structures" are the data that is conceptually part of your diagram model.

Most of PartManager just adds or removes Nodes or Links based on changes to the diagram's model.  None of the methods such as PartManager.OnNodeAdded are supposed to make any changes to the model.

[Actually, there are some PartManager methods that do modify the model, such as PartManager.CopyParts and PartManager.DeleteParts.  Those are useful methods that could not go in any model class because they know about Nodes and Links.  But it seemed more logical to put those methods there than in any tool or in the Diagram class itself.]

The various tools and the diagram's CommandHandler all modify the model by calling methods of the model.  CommandHandler.Paste for example calls IDiagramModel.AddCollectionCopy to copy the data in the clipboard into the diagram.  The DraggingTool, when the user does a control-drop, calls PartManager.CopyParts, which in turn calls IDiagramModel.AddCollectionCopy.  CommandHandler.Delete calls PartManager.DeleteParts, which in turn calls IDiagramModel.RemoveNode or RemoveLink.

So the simple answer to your question is OnModelChanged.

You have a choice.  Do you want to maintain your internal data structures continually, or only at the end of a committed model transaction?

If you want to update continuously, take a look at the protected methods of the model class that you are using.  You'll want to override some of them to do what you want.  For example, you might override InsertNode and DeleteNode and InsertLink and DeleteLink.

An alternative to overriding those model methods is to implement a Model.Changed event handler to look for cases where node data or link data is added or removed or modified.

If you want to update only when a transaction commits, you might find this discussion useful: http://www.nwoods.com/forum/forum_posts.asp?TID=3211.
]]> Thu, 11 Mar 2010 10:36:02 +0000 http://www.nwoods.com/forum/forum_posts.asp?TID=3263&PID=13379#13379 GoDiagram : Link Handle event http://www.nwoods.com/forum/forum_posts.asp?TID=3265&PID=13378#13378 Author: tackmeister
Subject: Link Handle event
Posted: 11 March 2010 at 10:16am

Is there an event that can be caught when a link handle is adjusted or when any handle in a link is adjusted?]]> Thu, 11 Mar 2010 10:16:40 +0000 http://www.nwoods.com/forum/forum_posts.asp?TID=3265&PID=13378#13378 GoXam : Create custom Node Figure using Path object http://www.nwoods.com/forum/forum_posts.asp?TID=3262&PID=13377#13377 Author: walter
Subject: Create custom Node Figure using Path object
Posted: 11 March 2010 at 9:42am

Oh, I guess you'd find the definition of the equivalent closed geometry useful:
    <DataTemplate x:Key="DataObjectNodeTemplate0a">
      <go:NodePanel Height="{Binding Path=Data.Height, Mode=TwoWay}"
                    Width="{Binding Path=Data.Width, Mode=TwoWay}"
                    go:Part.SelectionAdorned="True"
                    go:Part.Resizable="True"
                    go:Node.Location="{Binding Path=Data.Location, Mode=TwoWay}">
        <Path x:Name="Shape" Stretch="Fill"
              Stroke="Gray" StrokeThickness="1"
              Fill="{Binding Path=Data.Color}">
          <Path.Data>
            <PathGeometry>
              <PathFigure IsClosed="True" IsFilled="True" StartPoint="0 0">
                <LineSegment Point="0 8" />
                <LineSegment Point="8 8" />
                <LineSegment Point="8 2" />
                <LineSegment Point="6 0" />
                <LineSegment Point="0 0" />
              </PathFigure>
              <PathFigure IsClosed="False" IsFilled="False" StartPoint="6 0">
                <LineSegment Point="6 2" />
                <LineSegment Point="8 2" />
              </PathFigure>
            </PathGeometry>
          </Path.Data>
        </Path>
        <TextBlock Text="{Binding Data.Text}"
                   HorizontalAlignment="Center" VerticalAlignment="Center" />
      </go:NodePanel>
    </DataTemplate>

]]> Thu, 11 Mar 2010 09:42:04 +0000 http://www.nwoods.com/forum/forum_posts.asp?TID=3262&PID=13377#13377 GoXam : Create custom Node Figure using Path object http://www.nwoods.com/forum/forum_posts.asp?TID=3262&PID=13376#13376 Author: walter
Subject: Create custom Node Figure using Path object
Posted: 11 March 2010 at 9:31am

I don't have access to the template resources you refer to, so I tried this:
    <DataTemplate x:Key="DataObjectNodeTemplate0">
      <go:NodePanel Height="{Binding Path=Data.Height, Mode=TwoWay}"
                    Width="{Binding Path=Data.Width, Mode=TwoWay}"
                    go:Part.SelectionAdorned="True"
                    go:Part.Resizable="True"
                    go:Node.Location="{Binding Path=Data.Location, Mode=TwoWay}">
        <Path x:Name="Shape" Stretch="Fill"
              Stroke="Gray" StrokeThickness="1"
              Fill="{Binding Path=Data.Color}">
          <Path.Data>
            <GeometryGroup>
              <LineGeometry StartPoint="0,0" EndPoint="0,8" />
              <LineGeometry StartPoint="0,8" EndPoint="8,8" />
              <LineGeometry StartPoint="8,8" EndPoint="8,2" />
              <LineGeometry StartPoint="0,0" EndPoint="6,0" />
              <LineGeometry StartPoint="8,2" EndPoint="6,2" />
              <LineGeometry StartPoint="6,2" EndPoint="6,0" />
              <LineGeometry StartPoint="6,0" EndPoint="8,2" />
            </GeometryGroup>
          </Path.Data>
        </Path>
        <TextBlock Text="{Binding Data.Text}"
                   HorizontalAlignment="Center" VerticalAlignment="Center" />
      </go:NodePanel>
    </DataTemplate>

And it works fine.  Maybe there's a problem with an adornment template that you applied.

For the second issue, I do notice that the Path shape you have defined is an open figure, not a closed one, so one cannot Fill it with a Brush, as you can see by the Fill binding.  Because there's no brush in the middle of the shape, the user cannot pick that object there, which is why the user cannot drag it at that point.

We do have a similar figure: NodeFigure.File.  Here's how I would use it:
    <DataTemplate x:Key="DataObjectNodeTemplate2">
      <go:NodePanel Height="{Binding Path=Data.Height, Mode=TwoWay}"
                    Width="{Binding Path=Data.Width, Mode=TwoWay}"
                    go:Part.SelectionAdorned="True"
                    go:Part.Resizable="True"
                    go:Node.Location="{Binding Path=Data.Location, Mode=TwoWay}">
        <Path go:NodePanel.Figure="File"
              Stroke="Gray" StrokeThickness="1"
              Fill="{Binding Path=Data.Color}" />
        <TextBlock Text="{Binding Data.Key}"
                   HorizontalAlignment="Center" VerticalAlignment="Center" />
      </go:NodePanel>
    </DataTemplate>

]]> Thu, 11 Mar 2010 09:31:22 +0000 http://www.nwoods.com/forum/forum_posts.asp?TID=3262&PID=13376#13376 GoDiagram : Moving Endpoint closer to Ports http://www.nwoods.com/forum/forum_posts.asp?TID=3264&PID=13375#13375 Author: Jake
Subject: Moving Endpoint closer to Ports
Posted: 11 March 2010 at 8:44am

GoPort.EndSegmentLength determines how long the first stroke from/to the port is. (see also GetFromEndSegmentLength & GetToEndSegmentLength)]]> Thu, 11 Mar 2010 08:44:53 +0000 http://www.nwoods.com/forum/forum_posts.asp?TID=3264&PID=13375#13375 GoDiagram : Moving Endpoint closer to Ports http://www.nwoods.com/forum/forum_posts.asp?TID=3264&PID=13374#13374 Author: thunis21
Subject: Moving Endpoint closer to Ports
Posted: 11 March 2010 at 7:29am

Hi Jake - what is the best practice to move the end point closer to the ports when my arrows is in the middle of the line, if the user turn on the normal arrow placement option then the endpoint can return to normal behavior.
 
 
 
Look at the second image, when the goobjects get to close to each other then the link makes a U turn. I need the endpoint a bit closer to the ports.
 
 
 
]]> Thu, 11 Mar 2010 07:29:08 +0000 http://www.nwoods.com/forum/forum_posts.asp?TID=3264&PID=13374#13374 GoDiagram : Rounded Lines with Jump Over http://www.nwoods.com/forum/forum_posts.asp?TID=3216&PID=13373#13373 Author: Jake
Subject: Rounded Lines with Jump Over
Posted: 11 March 2010 at 7:04am

Yes, the blue line is just set with width, and the orange is a highlight. The thin red line is also JumpGaps, but it is the first one drawn, so it doesn't happen to have any gaps.

I'll send you some mail about getting you a kit.]]> Thu, 11 Mar 2010 07:04:25 +0000 http://www.nwoods.com/forum/forum_posts.asp?TID=3216&PID=13373#13373 GoXam : OnNodeAdded / OnModelChanged http://www.nwoods.com/forum/forum_posts.asp?TID=3263&PID=13372#13372 Author: AuroreErgole
Subject: OnNodeAdded / OnModelChanged
Posted: 11 March 2010 at 2:52am

Hello,

I use diagram to visualize my internal structure. Thus I need to add item and remove item in my structure when we cut /add nodes in the diagram.

I think that I have two ways to do that :
   using OnNodeAdded or OnModelChanged.

Can you explain me what is the better way ?

I was able to catch adding of node in the both functions but, I realize that the functions are called twice.
It doesn't matter for delete because I can empty my item and then don't recall my remove function, but I don't find tricks for adding node.

(I'm in wpf development).

Thanks
Aurore
]]> Thu, 11 Mar 2010 02:52:47 +0000 http://www.nwoods.com/forum/forum_posts.asp?TID=3263&PID=13372#13372 GoDiagram : Rounded Lines with Jump Over http://www.nwoods.com/forum/forum_posts.asp?TID=3216&PID=13371#13371 Author: thunis21
Subject: Rounded Lines with Jump Over
Posted: 11 March 2010 at 1:59am

Jake it look great, I asume that it will work with any line thickness and not based on HighlightPenWidth?

Can I get my hands on a beta to test it?
 
]]> Thu, 11 Mar 2010 01:59:32 +0000 http://www.nwoods.com/forum/forum_posts.asp?TID=3216&PID=13371#13371 GoXam : Create custom Node Figure using Path object http://www.nwoods.com/forum/forum_posts.asp?TID=3262&PID=13370#13370 Author: hlobil
Subject: Create custom Node Figure using Path object
Posted: 10 March 2010 at 5:42pm

Is creating custom Node Figure supported?
 
If I comment my x:Name="Shape" object and replace it with <Path go:NodePanel.Figure="Rectangle" things seem to work.
 
I have two issues.
  1. When I drag the object its has 0 width and 0 height even though I set it.
  2. After I resize it I can only drag the Node when I select the text, but I can't move the object otherwise (when mouse pointer not over textbox)  
Any suggestions on how to create a custom NodePanel.Figure?
 
Thank you,
 
Pavel
 
 

<DataTemplate x:Key="DataObjectNodeTemplate">

<go:NodePanel Sizing="Fixed"

Height="{Binding Path=Data.Height, Mode=TwoWay}"

Width="{Binding Path=Data.Width, Mode=TwoWay}"

go:Part.SelectionAdorned="True"

go:Part.SelectionAdornmentTemplate="{StaticResource BoxNodeAdornmentTemplate}"

go:Part.Resizable="True"

go:Part.ResizeAdornmentTemplate="{StaticResource GroupResizeAdornmentTemplate}"

go:Node.Location="{Binding Path=Data.Location, Mode=TwoWay}">

<!--go:Part.SelectionElementName="Shape"-->

<!--<Path go:NodePanel.Figure="Rectangle"

Fill="{Binding Path=Data.Color}"

Stroke="Black"

StrokeThickness="1" />-->

<Path x:Name="Shape"

Stroke="Gray"

StrokeThickness="1"

Stretch="Fill">

<Path.Data>

<GeometryGroup>

<LineGeometry StartPoint="0,0"

EndPoint="0,8" />

<LineGeometry StartPoint="0,8"

EndPoint="8,8" />

<LineGeometry StartPoint="8,8"

EndPoint="8,2" />

<LineGeometry StartPoint="0,0"

EndPoint="6,0" />

<LineGeometry StartPoint="8,2"

EndPoint="6,2" />

<LineGeometry StartPoint="6,2"

EndPoint="6,0" />

<LineGeometry StartPoint="6,0"

EndPoint="8,2" />

</GeometryGroup>

</Path.Data>

</Path>

<TextBlock Style="{StaticResource TextBlockStyle}"

Text="{Binding Data.Text, Mode=TwoWay}" />

</go:NodePanel>

　　

</DataTemplate>

]]> Wed, 10 Mar 2010 17:42:24 +0000 http://www.nwoods.com/forum/forum_posts.asp?TID=3262&PID=13370#13370