Questions on UI for WPF Forum

1 answer

402 views

Cool ObservableCollection Sort Extension

I came across the need to be able to sort my ObservableCollections the other day and I found a nice code snippet demonstrating how to sort an ObservableCollection even if the collection type does not support IComparable. I added the ReverseCompare/Descending sort just in case. Anyhow thought it was a neat piece of code and hope it may help some others out there.

Enjoy!

    
            public static class CollectionSorter  
        
                {  
        
                    public static void Sort<T>(this ObservableCollection<T> collection, Comparison<T> comparison)  
        
                    {  
        
                        var comparer = new Comparer<T>(comparison);  
        
                        List<T> sorted = collection.OrderBy(x => x, comparer).ToList();  
        
                        for (int i = 0; i < sorted.Count(); i++)  
        
                            collection.Move(collection.IndexOf(sorted[i]), i);  
        
                    }  
        
                    public static void DescendingSort<T>(this ObservableCollection<T> collection, Comparison<T> comparison)  
        
                    {  
        
                        var comparer = new ReverseComparer<T>(comparison);  
        
                        List<T> sorted = collection.OrderBy(x => x, comparer).ToList();  
        
                        for (int i = 0; i < sorted.Count(); i++)  
        
                            collection.Move(collection.IndexOf(sorted[i]), i);  
        
                    }       
        
                }  
        
                internal class Comparer<T> : IComparer<T>  
        
                {  
        
                    private readonly Comparison<T> comparison;  
        
                    public Comparer(Comparison<T> comparison)  
        
                    {  
        
                        this.comparison = comparison;  
        
                    } 
        
                    #region IComparer<T> Members  
        
                    public int Compare(T x, T y)  
        
                    {  
        
                        return comparison.Invoke(x, y);  
        
                    } 
        
                    #endregion  
        
                }  
        
                internal class ReverseComparer<T> : IComparer<T>  
        
                {  
        
                    private readonly Comparison<T> comparison;  
        
                    public ReverseComparer(Comparison<T> comparison)  
        
                    {  
        
                        this.comparison = comparison;  
        
                    } 
        
                    #region IComparer<T> Members  
        
                    public int Compare(T x, T y)  
        
                    {  
        
                        return -comparison.Invoke(x, y);  
        
                    } 
        
                    #endregion  
        
                }

then you can use it on your ObservableCollections as such.

    
            private void Log(LogEntry log)  
        
                    {  
        
                        LoggedEvents.Add(log);  
        
                        LoggedEvents.DescendingSort((x, y) => x.TimeStampString.CompareTo(y.TimeStampString));  
        
                    }        
        
                    private ObservableCollection<LogEntry> entries = new ObservableCollection<LogEntry>();  
        
                    public ObservableCollection<LogEntry> LoggedEvents  
        
                    {  
        
                        get 
        
                        {                  
        
                            return entries;  
        
                        }  
        
                        set 
        
                        {  
        
                            entries = value;  
        
                            RaisePropertyChanged(LoggedProperty);  
        
                        }  
        
                    }

General Discussions

answered on 27 Nov 2012

1 answer

215 views

Disable row edit

How to disable row edit mode? Leave only insert and delete.

GridView

answered on 27 Nov 2012

1 answer

231 views

AutoComplete DropDownList position

Hi,

If the vertical scrollbar is used to scroll the list of dropdown items and then whilst the drop down is still displayed the applications main window is moved, the dropdown panel remains at it's former position and does not follow the location of the autocomplete edit box.

Is there a way to control this so that it either moves with the form or closes before the form is moved in the same way that a combobox would?

Attached screenshot illustrates the problem when using the WPF demo controls application.

Rgds
Graeme

AutoCompleteBox

answered on 27 Nov 2012

0 answers

65 views

Need information about adding references into test studio

HI ,

i am using trail version of Test studio and i want to display the value of a variable. To display the value in C# we will use "MessageBox.Show("Value of the variable")". when i use this method i am getting one error message as namespace is not added as a hedder files, but i am not able to see in the list namesapces because i have not added repective *.dll files. can any one please let me know about adding of *.dll files.

Thanks
satyanarayana

General Discussions

asked on 27 Nov 2012

2 answers

223 views

PropertyGrid values' font size will not change

Hello,

We are using version 2012.2.607.40 of your WPF controls. Our application supports several font sizes so we updated many Telerik styles and templates for the PropertyGrid to use the dynamic font size. Our changes worked for the property names (they all show the correct size now), but some of the values do not. We do not see where the value templates are so that we can change them.

How can we get to the right templates for the PropertyGrid values so we can change them to use our dynamic size -for all the value types used in the property grid? Or, is there another way to accomplish this? I've attached a picture so you can visualize the problem. You can see some of the values have the larger size but others do not.

Thanks!
-Mark

PropertyGrid

answered on 27 Nov 2012

2 answers

141 views

Docking Empty when runing without debug

When I run my program with debug then everything works normal, but whenever I run without debug or from the exe it dosn't display anything. Actually it tells me it is empty when I have already added the controls in xaml, they are static not dynamic at all. It still says all my controls exist and I can use them but they not displayed at all. This used to work but I made not changes that would break it. I do however toggle it's visibility but even when I have it always visible it dosn't work. It's like it is not seeing anything under the RadDocking tag.

<telerik:RadDocking Background="#edf3fa" x:Name="dmManager" Grid.Row="1" Margin="0,0,0,33" Padding="0,0,0,0">

<telerik:RadDocking.DocumentHost>

<telerik:RadSplitContainer>

<telerik:RadPaneGroup>

(Assume controls)

</telerik:RadPaneGroup>

</telerik:RadSplitContainer>

</telerik:RadDocking.DocumentHost>

<telerik:RadSplitContainer InitialPosition="DockedLeft">

<telerik:RadPaneGroup>

(Assume controls)

</telerik:RadPaneGroup>

</telerik:RadSplitContainer>

<telerik:RadSplitContainer InitialPosition="DockedRight">

<telerik:RadPaneGroup>

(Assume controls)

</telerik:RadPaneGroup>

</telerik:RadSplitContainer>

<telerik:RadSplitContainer x:Name="Bottom" InitialPosition="DockedBottom">

<telerik:RadPaneGroup>

(Assume controls)

</telerik:RadPaneGroup>

</telerik:RadSplitContainer>

</telerik:RadDocking>

Docking

answered on 26 Nov 2012

1 answer

248 views

Binding ObservableCollection to ItemSource

What is the proper way of coding standard to bind the ObservableCollection to ItemSource?
The case i'm facing is i have multiple lineseries, therefore, i created an ObservableCollection<IEnumberable><T>> that contains array of ObservableCollection<T>. i make the ObservableCollection<IEnumberable><T>> binded to the itemsource of lineSeries with INotifyPropertyChanged.

Code Snippet:
XAML:

<chartView:LineSeries x:Name="Item1" ItemsSource="{Binding Item[0]}" ValueBinding="Value" CategoryBinding="Counter" />

<chartView:LineSeries x:Name="Item2" ItemsSource="{Binding Item[1]}" ValueBinding="Value" CategoryBinding="Counter" />

<chartView:LineSeries x:Name="Item3" ItemsSource="{Binding Item[2]}" ValueBinding="Value" CategoryBinding="Counter" />

<chartView:LineSeries x:Name="Item4" ItemsSource="{Binding Item[3]}" ValueBinding="Value" CategoryBinding="Counter" />

<chartView:LineSeries x:Name="Item5" ItemsSource="{Binding Item[4]}" ValueBinding="Value" CategoryBinding="Counter" />

C#

public ObservableCollection<IEnumerable<GraphPlot>> Item

{

get { return m_item; }

set

{

m_item = value;

OnPropertyChanged("Item");

}

i have an error "observablecollection collection was modified enumeration operation may not execute" using the code above.
is this the right way to bind it to multiple itemsource with only 1 Properties at real-time? any recommendation?

ChartView

answered on 26 Nov 2012

1 answer

221 views

setting IsOpen=true makes RadContextMenu staying opened

<Rectangle Stroke="Black" StrokeThickness="1" Fill="#DADADA" Height="8" Width="8">

<Rectangle.Triggers>

<EventTrigger RoutedEvent="MouseLeftButtonDown">

<BeginStoryboard>

<Storyboard>

<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="IsOpen" Storyboard.Target="{x:Reference ContextMenu}">

<DiscreteObjectKeyFrame>

<DiscreteObjectKeyFrame.Value>

<sys:Boolean>True</sys:Boolean>

</DiscreteObjectKeyFrame.Value>

</DiscreteObjectKeyFrame>

</ObjectAnimationUsingKeyFrames>

</Storyboard>

</BeginStoryboard>

</EventTrigger>

</Rectangle.Triggers>

<telerik:RadContextMenu.ContextMenu>

<telerik:RadContextMenu x:Name="ContextMenu" ShowDelay="0">

<telerik:RadMenuItem Header="Reset value" />

<telerik:RadMenuItem Header="Set binding" />

</telerik:RadContextMenu>

</telerik:RadContextMenu.ContextMenu>

</Rectangle>

Click on the rectangle, then click somewhere else and radcontextmenu stays opened. This way you can open multiple contexmenus simultaneously

This does not happen with regular contextmenu.

ContextMenu

answered on 26 Nov 2012

3 answers

244 views

Persistence Framework kills binding

Hello,

I bind 2 Controls

<telerik:RadToggleButton x:Name="ShowLogButton" Grid.Column="1" Grid.Row="1" Content="..."></telerik:RadToggleButton>

<telerik:RadListBox ItemsSource="{Binding Path=Log}" DisplayMemberPath="Description" Grid.Column="0" Grid.Row="2" Grid.ColumnSpan="2" Height="70" Visibility="{Binding ElementName=ShowLogButton, Path=IsChecked, Converter={StaticResource ControlVisibilityConverter}}">

</telerik:RadListBox>

Follow Visible attribute, after saving and loading my window with Persistence Framework my toggle button is broken and dont works anymore

This code helps


<telerik:RadToggleButton x:Name="ShowLogButton"  Grid.Column="1" Grid.Row="1" Content="..."></telerik:RadToggleButton>
<telerik:RadListBox ItemsSource="{Binding Path=Log}" DisplayMemberPath="Description" Grid.Column="0" Grid.Row="2" Grid.ColumnSpan="2" Height="70" Visibility="{Binding ElementName=ShowLogButton, Path=IsChecked,  Converter={StaticResource ControlVisibilityConverter}}">

<telerik:PersistenceManager.SerializationOptions>
    <telerik:SerializationMetadataCollection>
        <telerik:PropertyNameMetadata Condition="Except" Expression="Visibility" SearchType="PropertyName" />
    </telerik:SerializationMetadataCollection>
</telerik:PersistenceManager.SerializationOptions>
</telerik:RadListBox>

Should i use this for every binded Porperty? Can i exclude any binded properties from serialisation ?

PersistenceFramework

answered on 26 Nov 2012

1 answer

200 views

Focus Pane or Floating Window on right click

Hi,

I've noticed that the panes and floating windows aren't focused when I right mouse click on each control.

What's the best way to focus a Pane/Floating Window on right mouse click?

Thank you for your time,

Rob

Docking

answered on 26 Nov 2012