Questions on UI for WPF Forum

1 answer

111 views

Hi All,

I have a Radgrid element with auto generate columns set to true,
I want to change background color of cells according to the values that are bounded.

How this can be done programatically?

I don't specify the coulmns in xaml..? and I can't hook to some appropriate event..
and moreover I can't loop over the rows and the cells.

Please advise,
Mark

GridView

answered on 06 Jul 2010

1 answer

75 views

Selecting item with no expansion

Is it possible to Handle the event for certain items in my Outlook bar, for some of the items I wish to expand the Content and show it in the Pane.

For two of my items, I just want to get the event of it being clicked and selected, but without it expanding in the bar.

I'd like this with Databinding Style if possible.

Cheers, David Poole.

OutlookBar

answered on 06 Jul 2010

1 answer

142 views

Custom inherited library

Hi,

I'm trying to create a custom control library using telerik controls as base clases, and creating a default styleguide based on the default telerik styles for each control.

Basically, what I have (as if I was extending from standard WPF controls) is a ResourceDictionary (Generic.xaml) with a Targeted Style for each Custom Control, using the 'BasedOn' property. Something like this:

    
            <Style BasedOn="{StaticResource {x:Type ComboBox}}"  
        
                   TargetType="{x:Type local:MyComboBox}">  
        
                    <Setter Property="Background" Value="Red" />  
        
                    <Setter Property="Foreground" Value="DarkGray" />  
        
            </Style>

Regrettably, it seems this doesn't work out of the box with telerik, I mean, using RadComboBox as StaticResource. I've also tried using the ThemeResourceKey with no luck:

    
            <Style TargetType="{x:Type local:MyComboBox}"  
        
                           BasedOn="{StaticResource {telerik:ThemeResourceKey ThemeType=telerik:Office_BlackTheme, ElementType=Controls:RadComboBox}}">  
        
                <Setter Property="Background" Value="Red" />  
        
                <Setter Property="Foreground" Value="DarkGray" />  
        
            </Style>

The MyComboBox file looks like this:

    
            public class MyComboBox : RadComboBox  
        
            {  
        
                    static MyComboBox ()  
        
                    {  
        
                        DefaultStyleKeyProperty.OverrideMetadata(typeof(MyComboBox), new FrameworkPropertyMetadata(typeof(MyComboBox)));  
        
                    }  
        
            }

I also tried overriding the TargetType of the inherited control, again, no luck:

    
            [LocalizabilityAttribute(LocalizationCategory.NeverLocalize)]  
        
            [Ambient]  
        
            public Type TargetType  
        
            {  
        
                get { return typeof (RadComboBox);}   
        
            }

Any suggestions?

Thanks,

--

R.

General Discussions

answered on 06 Jul 2010

4 answers

288 views

Making a radcontextmenu an application resource

How to add the Rad ContextMenu to Application resource so that it can be used on other windows as well.

ContextMenu

answered on 06 Jul 2010

1 answer

139 views

Programmatically re-dock a floating pane

Hi,

I’m trying to implement a piece of functionality on a floating window that will minimise/re-group the floating window back to the main area of the docking control.

Is there a way to achieve this?
Chris.

Docking

answered on 05 Jul 2010

7 answers

138 views

Prism with Dock issue

I am using RadDocking along with Prism. I found the sample provided by Telerik on the subject and i am using it as well.

My problem is that i want to destroy the Region when a RadPane is closed. Which is something the sample is not doing.

So, it brings us to this:

    
            protected override void Adapt(IRegion region, RadPaneGroup regionTarget)

At this stage, i would like to be able to get a reference to the RadDocking, to subscribe the Close event, and then do the destroy Region stuff.

But i can't figure out how to get the RadDocking from a RadPaneGroup. I tried several FindParent function, but none seems to be able to travel up the VisualTree to the RadDocking.

I am using the latest internal build.

Thank you for any help.

Docking

answered on 05 Jul 2010

6 answers

308 views

Getting Property values for GridViewHeaderCell from a Theme

I'm having trouble trying to obtain/apply a default property value from a theme. Certain actions in my application change the GridViewHeaderCell's foreground property to a color different than that of the theme. After it changes, I cannot figure out an easy way to change the color back to the theme's normal color.

Here is how I set the style to change the Header cells' color.

                    foreach(Telerik.Windows.Controls.GridViewColumn column in GridView.Columns)         
            {         
               Style s = new Style(typeof(GridViewHeaderCell), column.HeaderCellStyle);         
               s.Setters.Add(new Setter(GridViewHeaderCell.ForegroundProperty, new SolidColorBrush(Colors.Red)));         
               s.Seal();         
               column.HeaderCellStyle = s;         
            }         

To Change it back to the default, I've tried the following

                    column.ClearValue(GridViewHeaderCell.ForegroundProperty); //no noticeable impact 
            
            column.ClearValue(GridViewColumn.HeadCellStyleProperty);  //no noticeable impact         
            
            //this makes the foreground (some text) disappear altogether         
            Style s = new Style(typeof(GridViewHeaderCell), column.HeaderCellStyle);         
            s.Setters.Add(new Setter(GridViewHeaderCell.ForegroundProperty, null));         
            s.Seal();         
            column.HeaderCellStyle = s;

None of those three ways seem to do the trick. I tried clearing the value with the hope that the Theme's default header cell foreground property would take place once the local value is removed, but it doesn't seem to do anything.

I have also tried getting and storing the default value before I change it (via GridViewHeaderCell.ForegroundProperty.GetMetadata(typeof(GridViewHeaderCell))...) but the PropertyMetaData object returned always indicates that the default Foreground for GridViewHeaderCell is a black brush, even when using themes like Office Black or Vista, which clearly do not use a black brush in their foregrounds.

Has anyone dealt with this before, or know where I'm going wrong? If anyone can help me figure out the right way to do it, I will be most grateful.

Thanks,
Tom

GridView

answered on 05 Jul 2010

1 answer

190 views

FilterDescriptor

Hi,

I'm trying to programmatically set a FilterDescriptor to default filter out a number of rows in a dataset/datatable based on

a Boolean property/column that I retrieve from my database/viewmodel. The problem is that I keep getting conversion error:

'The binary operator Equal is not defined for the types 'System.Object' and 'System.Boolean.'.

paramView.FilterDescriptors.Add(new FilterDescriptor("Show",FilterOperator.IsEqualTo,true));

I've confirmed that the datatype from the database is a System.Data.DbType.Boolean (shows up in the grid as a checkbox column by default). Am I wrong in assuming that there should be a way of expressing 'true' that meets the requirement of the FilterExpression-generator, or is there another recommended way of accomplishing this task?

Best regards,

Finn

GridView