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Font Colour based on Value

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James
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James asked on 06 Aug 2010, 05:31 PM

I currently have a Loop going through a cube which returns the name (Caption) of its items.
However as this is an OLAP cube I want to distinguish between user defined and attribute hierarchies. I thought the best way to do this would be to give each one a different color (so give User Defined Hierarchies a blue font and Attribute Hierarchies a red font for example).

I thought this would be simple but the method I tried below threw alot of errors, while other methods turned all of the items a particular colour rather than just the items I wanted.

Has anyone got an idea of how I could change an items colour depending on its value??


Window1.xaml.cs

foreach (Hierarchy hierarchy in dimension.Hierarchies)
                {

                    Dimension HierarchyItem = new Dimension();
                    HierarchyItem.Caption = hierarchy.Caption;
                    DimensionItem.SubDimensions.Add(HierarchyItem);
                    HierarchyItem.IsDraggable = true;

              
if (HierarchyItem.Caption == "Account Number")
                        HierarchyItem.Caption = Brushes.Red)
                        else if (HierarchyItem.Caption == "Customer Number")
                        HierarchyItem.Caption = Brushes.Blue)

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Miroslav
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answered on 11 Aug 2010, 04:15 PM
Hello James,

You can have an observable Brush property on your business class, say

public Brush TitleBrush { ... }

Then in the TreeView's ItemTemplate (the HierarchicalDataTemplate) you can bind the Foreground of the TextBlock there to this property:

Foreground="{Binding TileBrush}"

Does this work for you?

All the best,
Miroslav
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James
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answered on 17 Aug 2010, 10:17 AM
Nearly, but I still get an error.....

HierarchyItem.TitleBrush.Add(TitleBrush)

I am still trying to get the colour of the text to change depending on its text value (Caption) but it tells me that I cannot convert the observable collection to media brush. 

Am I just missing something simple?? 

Regards
James


Window1.xaml
<Window.Resources>
<HierarchicalDataTemplate x:Key="ColorTemplate" ItemsSource ="{Binding TitleBrush}">
<TextBlock Foreground="{Binding TitleBrush}"/>
</HierarchicalDataTemplate>
</Window.Resources>

Cube.cs
public class Dimension
    {
        private string _caption;
        private string _uniqueName;
 
        public Dimension()
        {      
            this.TitleBrush = new ObservableCollection<TitleBrush>();
        }
    
        public ObservableCollection<TitleBrush> TitleBrush
        {
            get;
            set;
        }

public class TitleBrush
    {
        private object _brush;

        public object Brush
        {
            get { return _brush; }
            set { _brush = value; }
        }
    }


Window1.xaml.cs


foreach
(Hierarchy hierarchy in dimension.Hierarchies)
               {
                   Dimension HierarchyItem = new Dimension();
                   HierarchyItem.Caption = hierarchy.Caption;
                   HierarchyItem.UniqueName = hierarchy.UniqueName;
                   DimensionItem.SubDimensions.Add(HierarchyItem);
                   HierarchyItem.IsDraggable = true;
                    
                 if (HierarchyItem.Caption == "Account Number")
                 {
        ObservableCollection<Brush> TitleBrush = new ObservableCollection<Brush>();
                TitleBrush.Add(Brushes.Crimson);
                HierarchyItem.TitleBrush.Add(TitleBrush);
                   }

               dimensionRoot.SubDimensions.Add(DimensionItem);
 
           }
 
           treeCube.Items.Add(dimensionRoot);


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Tina Stancheva
Telerik team
answered on 20 Aug 2010, 09:11 AM
Hi James,

I prepared a sample project implementing Miro's suggestion. Can you take a look at it and let me know if it works for you or if your scenario requires a different approach.

Regards,
Tina Stancheva
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James
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answered on 23 Aug 2010, 09:23 AM
Hi Tina,

Yes that project can be modified to suit my needs.
Thanks for the help

James
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Miroslav
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