Hi,
I have a content page which I want to show based on a value being not null and I am using a converter for that.
Here is the code:
<igDock:SplitPane igDock:SplitPane.RelativeSize="100,100" SplitterOrientation="Vertical" > <igDock:ContentPane TabHeader="ViewerContentPane" x:Name="MyPane" > <igDock:ContentPane.Header> <TextBlock> <Run Text="Second Grid"/> </TextBlock> </igDock:ContentPane.Header> <igDP:XamDataGrid BindToSampleData="True" FieldLayoutInitialized="XamDataGrid_FieldLayoutInitialized"/> </igDock:ContentPane> <igDock:ContentPane TabHeader="Viewer" AllowClose="True" x:Name="ViewerPane" MinWidth="200" AutomationProperties.AutomationId="MyViewerPane" Header="Viewer" > <igDock:ContentPane.Style> <Style> <Setter Property="igDock:ContentPane.Visibility" Value="Collapsed"/> <Style.Triggers> <DataTrigger Binding="{Binding Path=Tag, ElementName=MyViewer, Converter={StaticResource isNullConverter}}" Value="False"> <Setter Property="igDock:ContentPane.Visibility" Value="Visible"/> </DataTrigger> </Style.Triggers> </Style> </igDock:ContentPane.Style> <ContentControl x:Name="MyViewer"></ContentControl> </igDock:ContentPane> </igDock:SplitPane>
here is the converter:
public class IsNullConverter : IValueConverter { public object Convert(object value, Type targetType, object parameter, CultureInfo culture) { return (value == null); } public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) { throw new InvalidOperationException("IsNullConverter can only be used OneWay."); } }
Will appreciate your help.
Thanks,
Imad.
I'm not sure that will work since you're doing a OneWay binding but assuming it would have worked clicking the Close button will set the Visibility to Collapsed which will have a higher dependency property precedence than the Style Setter. For CLR4 we might be able to switch our code so that we use SetCurrentValue but for CLR 3 there is no way around that. If you're using CLR 4 then you might be able to handle the Closing event, set e.Cancel to true and use SetCurrentValue (e.g. "((ContentPane)e.OriginalSource).SetCurrentValue(UIElement.VisibilityProperty, Visibility.Collapsed);" ).
In fact I have also setting Tag to null in Closed event handler. I forgot to post it.
private void MyViewer_Closed(object sender, Infragistics.Windows.DockManager.Events.PaneClosedEventArgs e) { MyViewer.Tag = null; e.Handled = true; }
The odd behaviour is that initially Contentpane "ViewerPane" gets collapsed due to trigger as Tag value is null. And when I set Tag value ContentPane becomes visible. As long as I set value of Tag and reset it to null, ContentPane is happy to become Visible and Collapsed but as soon as I press close button on ContentPane, its gets Collapsed but never becomes Visible again on setting a value to Tag.
Waiting for your response.
How to attach file? I can post you sample if you want to play with it.
imadulhaque said: How to attach file? I can post you sample if you want to play with it.
When you are replying you can go to the Options tab and attach a file.
Please find attached the sample.
As I mentioned you could handle the Closing event. In your case since you need to be updating the Tag anyway you could just set the Tag in the Closing and cancel the closing. e.g.
private void ViewerPane_Closing(object sender, Infragistics.Windows.DockManager.Events.PaneClosingEventArgs e){ MyViewer.Tag = null; e.Cancel = true; e.Handled = true;}
Andrew It worked. Thank you for your response.