Issue with context menu with a node

GoXam
1

Hi,

I have two diagrams-- yDiagram & xDiagram
There are different nodes assigned to both models.

Now I added a context menu ‘Delete’ on nodes of yDiagram.
Now I want to perform the following task:

If user click on ‘Delete’ context menu command of any node of yDiagram, then nodes of x diagram, which satisfy the following condition, should be automatically deleted:

xDiagram.Node.YAxisLabel == yDiagram.Text



But the issue is that the following line doesn’t give any information of selected node of ‘yDiagram’, so please have a look & provide me the solution:

varpartdata = ((FrameworkElement)sender).DataContext as PartManager.PartBinding;

.xaml Code:

<

Grid x:Name=“LayoutRoot” Background=“White”>


<Grid.ColumnDefinitions>

<ColumnDefinition Width="100" />

<ColumnDefinition Width="*" />

</Grid.ColumnDefinitions>

<go:Diagram Grid.Column="0"

x:Name="yDiagram"

BorderBrush="Blue" BorderThickness="1"

HorizontalContentAlignment="Stretch"

VerticalContentAlignment="Stretch"

DragSelectingTool="{x:Null}"

NodeTemplate="{StaticResource YAxisLabelNodeTemplate}">

<go:Diagram.DraggingTool>

<local:CustomDraggingTool Tag="{Binding ElementName=xDiagram}"/>

</go:Diagram.DraggingTool>

</go:Diagram>

<go:Diagram Grid.Column="1"

x:Name="xDiagram"

BorderBrush="Blue" BorderThickness="1"

HorizontalContentAlignment="Stretch"

VerticalContentAlignment="Stretch"

NodeTemplateDictionary="{StaticResource NodeTemplates}"

LinkTemplateDictionary="{StaticResource LinkTemplates}"

/>

</Grid>

<

DataTemplate x:Key=“YAxisLabelNodeTemplate”>


<StackPanel go:Node.SelectionElementName=“LabelNode”


go:Part.Selectable=“True”


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


<menu:ContextMenuService.ContextMenu>


<menu:ContextMenu>


<menu:MenuItem Header=“Delete” Click=“OnDeleteContextMenuItemClick” >


<menu:MenuItem.Icon>


<Image Source="{Binding Path=Data.NodeImage}" Height=“20” />


</menu:MenuItem.Icon>


</menu:MenuItem>


</menu:ContextMenu>


</menu:ContextMenuService.ContextMenu>

<TextBlock Text="{Binding Path=Data.Text}"/>

</StackPanel>

</DataTemplate>

.cs Code:

private

void OnDeleteContextMenuItemClick(object sender, RoutedEventArgs e)

{

var partdata = ((FrameworkElement)sender).DataContext as PartManager.PartBinding;

if (partdata == null || partdata.Data == null)

{

MessageBox.Show("Clicked on nothing or on unbound part");

}

else

{

MessageBox.Show("Clicked on data: " + partdata.Data.ToString());

}

}

2

The selected Nodes of a Diagram are included in the collection given by Diagram.SelectedParts.

3

Hi,

But if you right click on any object & click on context menu command, then there is no node in Diagram.SelectedParts

So how can I perform expectd task on that object?

4

Hi,

The following code has solved my problem:

private

void OnDeleteContextMenuItemClick(object sender, RoutedEventArgs e)

{

var

partdata = ((FrameworkElement)sender).DataContext as PartManager.PartBinding;

if (partdata == null || partdata.Data == null)

{

MessageBox.Show("Clicked on nothing or on unbound part");

}

else

{

yDiagram.SelectedParts.Add(partdata.Part);

}

}