Questions on UI for WPF Forum

2 answers

200 views

I have an object with custom properties. The only properties I wish to display in the property grid are those of category "MyCategory". How would I do that programatically?

protected string myproperty;

[Category("MyCategory")]

public string MyProperty{ get; set; }

I'm already setting the item and populating the RadPropertyGrid; it's the filtering I'm stuck on.

RadPropertyGrid1.Item = n;

PropertyGrid

answered on 17 Jul 2012

1 answer

282 views

Disable SelectionChanged on Up and Down Key in RadListBox using MVVM.

Hi,

I am using RadListBox (Binded to ObservableCollection<string>) and when I navigate through the RadListbox using up and down keys, selectedItem changes automatically. How can I disable this behaviour? I only want to change SelectedItem only by pressing Enter Key or by Mouse's LeftClick in MVVM.

ListBox

answered on 17 Jul 2012

1 answer

348 views

Position of TrackBall info items in popup?

In the chart I'm developing the user needs to be able to exclude or include series at runtime.

If I have understood the information correctly so far it is not possible to XAML-declare series on this kind of dynamic sources but that it is something you're considering for a future update. I didn't want to do it all using code behind becuase that would mess up my ability to declare templates for each series and its trackball.

So, instead I build a small ChartBehavior that acts as the "glue" between my dynamic data series and the chart. It works as expected except for one detail: A series that gets omitted and then included again always ends up at the bottom of the trackball info popup. I assumed that the order of the items in the trackball popup was based on the physical order of the Chart.Series collection so the the behavior saves the initial order to be able to re-insert an omitted series at its original position but this does not work.

How can I affect the order of the items in the trackball info popup?

internal sealed class DynamicCategoricalSeriesBehavior : ChartBehavior

{

private class SeriesInfo

{

public string SeriesKey { get; private set; }

public int Index { get; set; }

public SeriesInfo(string seriesKey, int seriesIndex)

{

Index = seriesIndex;

SeriesKey = seriesKey;

}

private Dictionary<CategoricalSeries, SeriesInfo> _categoricalSeries;

protected override void OnAttached()

{

base.OnAttached();

Chart.DataContextChanged += chartDataContextChanged;

listenToDataContextPropertyChanged(Chart.DataContext as INotifyPropertyChanged);

}

protected override void OnChartTemplateChanged(Canvas oldAdornerContainer, Canvas adornerContainer)

{

base.OnChartTemplateChanged(oldAdornerContainer, adornerContainer);

saveCategoricalSeriesValuePropertyNames();

transformMetricsForSeries(Chart as RadCartesianChart);

}

private void saveCategoricalSeriesValuePropertyNames()

{

var cartesianChart = Chart as RadCartesianChart;

if (cartesianChart == null)

return;

_categoricalSeries = new Dictionary<CategoricalSeries, SeriesInfo>();

var seriesIndex = 0;

foreach (var series in cartesianChart.Series)

{

var catSeries = series as CategoricalSeries;

if (catSeries == null)

continue;

var propertyNameValueBinding = catSeries.ValueBinding as PropertyNameDataPointBinding;

if (propertyNameValueBinding == null)

continue;

_categoricalSeries[catSeries] = new SeriesInfo(propertyNameValueBinding.PropertyName, seriesIndex++);

}

private void chartDataContextChanged(object sender, DependencyPropertyChangedEventArgs e)

{

listenToDataContextPropertyChanged(Chart.DataContext as INotifyPropertyChanged);

}

private void listenToDataContextPropertyChanged(INotifyPropertyChanged vm)

{

if (vm == null)

return;

vm.PropertyChanged += (o, args) =>

{

if (args.PropertyName == "DynamicDataSeries")

transformMetricsForSeries(Chart as RadCartesianChart);

};

}

private void transformMetricsForSeries(RadCartesianChart chart)

{

if (chart == null)

return;

var dynamicVM = Chart.DataContext as IDynamicMetricsValueSeriesProvider<double>;

if (dynamicVM == null)

return;

var supportedSeries = dynamicVM.DynamicDataSeries.Select(series => series.SeriesKey).ToList();

foreach (var kvp in _categoricalSeries)

{

var series = kvp.Key;

var seriesKey = kvp.Value.SeriesKey;

if (!supportedSeries.Contains(seriesKey))

{

removeSeries(chart, series, seriesKey);

continue;

}

insertSeries(chart, series, seriesKey, dynamicVM);

}

private void insertSeries(RadCartesianChart chart, CategoricalSeries series, string key, IDynamicMetricsValueSeriesProvider<

double> seriesProvider)

{

if (series.Visibility != Visibility.Visible)

{

series.Visibility = Visibility.Visible;

var index = _categoricalSeries[series].Index;

chart.Series.Insert(index, series);

}

var dataPoints = seriesProvider.MetricsData.Where(i => i.MetricsId == key).ToList();

series.ValueBinding = new PropertyNameDataPointBinding("Value");

series.ItemsSource = dataPoints;

var stroked = series as CategoricalStrokedSeries;

if (stroked != null)

stroked.Stroke = seriesProvider.GetMetricsDataColorBrush(key);

}

private void removeSeries(RadCartesianChart chart, CategoricalSeries series, string key)

{

chart.Series.Remove(series);

series.Visibility = Visibility.Collapsed;

}

ChartView

answered on 17 Jul 2012

1 answer

65 views

Prevent Child Inheritence of a parents RadContextMenu

I Have a RadContextMenu in XAML in a RadTreeView that works fine. I dynamically load the tree items, and certain tree items I add a different Context menu, but it always opens the RadContextMenu in xaml. If I remove the xaml RadContextMenu ref, the dynamic ContextMenu loads.

So I guess is there a way to prevent every child from inheriting its parents context menu?

Thanks

ContextMenu

answered on 17 Jul 2012

1 answer

403 views

Updating ItemSource causes loss of focus

I am using the RadGridView for a data entry screen (using MVVM), the last row is always empty and when the user starts to enter data into it a new row is added to the bottom on the list. My issue is that once the itemSource is updated focus is taken out of the control and put into no mans land, making smooth data entry impossible.

The attached code is a cut down version of what i am doing and displays the same problem of lossing focus when the itemSource is updated.

XAML File


<Window x:Class="TelerikExample.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation"
Title="MainWindow" Height="350" Width="525">
<Window.Resources>
<DataTemplate x:Key="dtFirstName">
<TextBox Text="{Binding Path=FirstName, UpdateSourceTrigger=PropertyChanged, NotifyOnSourceUpdated=True}" />
</DataTemplate>
<DataTemplate x:Key="dtSecondName">
<TextBox Text="{Binding Path=SecondName, UpdateSourceTrigger=PropertyChanged, NotifyOnSourceUpdated=True}" />
</DataTemplate>
</Window.Resources>
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<telerik:RadGridView Grid.Row="1"
CanUserDeleteRows="False"
CanUserInsertRows="False"
CanUserSortColumns="False"
ShowGroupPanel="False"
AutoGeneratingColumn="RadGridView_AutoGeneratingColumn"
ItemsSource="{Binding Rows}"
RowIndicatorVisibility="Collapsed" 
AlternateRowBackground="White"
AlternationCount="2"
Background="AliceBlue"
EditTriggers="None"
HorizontalGridLinesBrush="SlateGray"
SelectionMode="Single"
SelectionUnit="FullRow"
ShowColumnHeaders="True"
IsFilteringAllowed="False"
VerticalGridLinesBrush="Transparent">
 
</telerik:RadGridView>
</Grid>
</Window>

XMAL Code Behind

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Windows;

using System.Windows.Controls;

using System.Windows.Data;

using System.Windows.Documents;

using System.Windows.Input;

using System.Windows.Media;

using System.Windows.Media.Imaging;

using System.Windows.Navigation;

using System.Windows.Shapes;

namespace TelerikExample

{

/// <summary>

/// Interaction logic for MainWindow.xaml

/// </summary>

public partial class MainWindow : Window

{

private GridViewModel _viewModel;

public MainWindow()

{

InitializeComponent();

_viewModel = new GridViewModel();

this.DataContext = _viewModel;

}

private void RadGridView_AutoGeneratingColumn(object sender, Telerik.Windows.Controls.GridViewAutoGeneratingColumnEventArgs e)

{

if (e.Column.UniqueName == "FirstName")

{

e.Column.CellTemplate = (DataTemplate)this.Resources["dtFirstName"];

e.Column.Header = "Forename";

}

else if (e.Column.UniqueName == "SecondName")

{

e.Column.CellTemplate = (DataTemplate)this.Resources["dtSecondName"];

e.Column.Header = "Surname";

}

else if (e.Column.UniqueName == "ViewModel")

{

e.Column.IsVisible = false;

}

View model file

namespace TelerikExample

{

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.ComponentModel;

using System.Dynamic;

using System.Collections.ObjectModel;

public class GridViewModel : INotifyPropertyChanged

{

public event PropertyChangedEventHandler PropertyChanged;

private ObservableCollection<dynamic> _rows;

/// <summary>

///

/// </summary>

/// <param name="name"></param>

protected void OnPropertyChanged(string name)

{

if (PropertyChanged != null)

{

PropertyChanged(this, new PropertyChangedEventArgs(name));

}

public GridViewModel()

{

_rows = new ObservableCollection<dynamic>();

var row = new ExpandoObject() as IDictionary<string, Object>;

row.Add("FirstName", string.Empty);

row.Add("SecondName", string.Empty);

row.Add("ViewModel", this);

((INotifyPropertyChanged)row).PropertyChanged += new PropertyChangedEventHandler(TelerikExample.PropertyChanged.Row_PropertyChanged);

_rows.Add(row);

}

public void CheckForNewRow()

{

IDictionary<string, Object> lastRow = _rows.Last() as IDictionary<string, Object>;

if (((string)lastRow["FirstName"]) != string.Empty || ((string)lastRow["SecondName"]) != string.Empty)

{

//Add new row

var row = new ExpandoObject() as IDictionary<string, Object>;

row.Add("FirstName", string.Empty);

row.Add("SecondName", string.Empty);

row.Add("ViewModel", this);

((INotifyPropertyChanged)row).PropertyChanged += new PropertyChangedEventHandler(TelerikExample.PropertyChanged.Row_PropertyChanged);

this.Rows.Add(row);

}

public ObservableCollection<dynamic> Rows

{

get

{

return _rows;

}

set

{

if (_rows != value)

{

_rows = value;

OnPropertyChanged("Rows");

}

Property changed event

namespace TelerikExample

{

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.ComponentModel;

using System.Dynamic;

public class PropertyChanged

{

public static void Row_PropertyChanged(object sender, PropertyChangedEventArgs e)

{

object value;

((IDictionary<string, Object>)sender).TryGetValue("ViewModel", out value);

GridViewModel vm = (GridViewModel)value;

vm.CheckForNewRow();

}

So my question is is there a way in which when the itemSource is updated focus isn't lost from the textbox.

GridView

answered on 17 Jul 2012

0 answers

113 views

Format current sentence

I have the below code attached to a SelectionChanged event in a WPF RichTextBox. The idea is for it to select the sentence the user is currently editing, a la iAWriter. Any ideas why it only selects past the cursor, or occasionally throws a ArgumentNullException? Thanks in advance.

Regex sentence = new Regex(@"(([.?!][^\s])*[^.?!])*[.?!]\s"); 
Regex srtl = new Regex(@"(?:[.?!]\s)(([.?!][^\s])*[^.?!])*", RegexOptions.RightToLeft); 
TextRange all = new TextRange(GetPoint(inp.Document.ContentStart, 0), GetPoint(inp.Document.ContentEnd, 0)); 
TextRange aa = new TextRange(GetPoint(inp.Document.ContentStart, 0), GetPoint(inp.CaretPosition, 0)); 
TextRange ab = new TextRange(GetPoint(inp.CaretPosition, 0), GetPoint(inp.Document.ContentEnd, 0)); 
Match b = srtl.Match(aa.Text); 
Match c = sentence.Match(ab.Text); 
 
TextRange cur = new TextRange(GetPoint(inp.CaretPosition, -b.Index), GetPoint(inp.CaretPosition.GetPositionAtOffset(c.Index + c.Length + b.Length), 0)); 
all.ApplyPropertyValue(TextElement.ForegroundProperty, Brushes.Silver); 
cur.ApplyPropertyValue(TextElement.ForegroundProperty, Brushes.White);

RichTextBox

asked on 17 Jul 2012

1 answer

246 views

How search an unique node by key???

Hi

The idea is this: based on a dataset generated a tree structure but I found the following issues

1 - There is not a unique Key property by item or node... or is the property "Name"?
2 - Using the name property FindName method seems not to work ... so for items already included, this method always returns "Nothing" and the item is again included.

This process is generated immediately to the constructor of the class or window, ie, in the Sub Main exite a method that executes the code...

For Each currentRow As DataRow In myDataset.Tables(0).Rows

Dim currentItem As New RadTreeViewItem
With currentItem
.Header = currentRow("ObjectName").ToString.ToUpper.Trim
.IsEditable = False
.IsEnabled = True
.Name = .Header
End With

Dim myObject As RadTreeViewItem = Me.ObjectTypeTree.FindName(currentRow("ObjectName").ToString.ToUpper.Trim)

If myObject Is Nothing Then
Me.ObjectTypeTree.Items.Add(currentItem)
End If

currentItem = Nothing
myObject = Nothing

Next

So how I can solve the case described in items 1 and 2.

In advance, thank you all ....

TreeView

answered on 17 Jul 2012

3 answers

264 views

Reloading saved diagram

I created a proj based on your class diagram example. I wanted to extend this example to save and reload the layout from disk. I called the diagram Save method and this is the Xml returned (I have removed some attributes for clarity). My question is when I call diagram Load, how do I re-attach the Model objects to the shapes in the diagrams? From the Xml below I can see a Shapes content contains the class name of the Model (MyProj.ClassViewModel) that represents that shape. Do I have to iterate all of the Shapes and set their content? If so how can I get this xml to store a key for the instance of the model a shape it contains.

Thanks Craig.

<?xml version="1.0" encoding="utf-8"?>
<RadDiagram Type="Telerik.Windows.Diagrams.Core.IGraphInternal" Version="2012.1">
  <Metadata Id="601d134b-3a2c-4055-9f7f-78d70597b052"  >
   <Title><![CDATA[Diagram [4/12/2012 8:44:45 AM]]]></Title>
   <Description><![CDATA[]]></Description>
    <Background>#00FFFFFF</Background>
   </Metadata>   <Shapes QNs="Telerik.Windows.Controls.Diagrams, Version=2012.1.326.40, Culture=neutral, PublicKeyToken=5803cfa389c90ce7;">     <RadDiagramShape Type="Telerik.Windows.Controls.RadDiagramShape" Id="4b632971-9f11-41a8-88b4-67992258e376"  Content="MyProj.ClassViewModel" Geometry="M0,0L60,0 60,40 0,40z" QN="0" />   </Shapes>
   <Connections />
</RadDiagram>

Diagram

answered on 17 Jul 2012

7 answers

189 views

Compile Errors with 2012.2.607.40

I upgraded to 2012.2.607.40 today and rebuilt my project (which built successfully before the upgrade) and received three instances of the following error:

error MC3064: Only public or internal classes can be used within markup. 'Style' type is not public or internal.

Below is the xaml that caused the errors.

<telerik:GridViewCheckBoxColumn.HeaderCellStyle>

<Style TargetType="{x:Type telerik:GridViewHeaderCell}">

<Style.Setters>

<Setter Property="Template">

<Setter.Value>

<ControlTemplate TargetType="{x:Type telerik:GridViewHeaderCell}">

<telerik:GridViewHeaderCell FilteringUIVisibility="Collapsed">

<StackPanel HorizontalAlignment="Center"

Margin="5" >

<ContentPresenter HorizontalAlignment="Center"

VerticalAlignment="Center"/>

<CheckBox x:Name="CheckBoxHeaderTemplate"

HorizontalAlignment="Center"

Margin="0,5,0,0"

Checked="CheckBoxHeader_Checked"

Unchecked="CheckBoxHeader_Checked"/>

</StackPanel>

</telerik:GridViewHeaderCell>

</ControlTemplate>

</Setter.Value>

</Setter>

</Style.Setters>

</Style>

</telerik:GridViewCheckBoxColumn.HeaderCellStyle>

<telerik:GridViewDataColumn.HeaderCellStyle>

<Style TargetType="{x:Type telerik:GridViewHeaderCell}">

<Style.Setters>

<Setter Property="Template">

<Setter.Value>

<ControlTemplate TargetType="{x:Type telerik:GridViewHeaderCell}">

<ContentPresenter HorizontalAlignment="Stretch"/>

</ControlTemplate>

</Setter.Value>

</Setter>

</Style.Setters>

</Style>

</telerik:GridViewDataColumn.HeaderCellStyle>

<telerik:GridViewCheckBoxColumn.CellStyle>

<Style TargetType="telerik:GridViewCell">

<Setter Property="HorizontalContentAlignment" Value="Center" />

</Style>

</telerik:GridViewCheckBoxColumn.CellStyle>

Any help would be greatly appreciated.
Thanks in advance,
Steve

GridView

answered on 17 Jul 2012

5 answers

172 views

[Solved] Multiple RadTileViewItem with differents themes??

Hi all

Is it possible to have multiple RadTileViewItem with different skins in the same RadTileView?

Note: The application is "submitted" to a large Metro Skin type through the instructions in VB.NET:

StyleManager.ApplicationTheme = New MetroTheme
RadSpellChecker.WindowSettings.Theme = StyleManager.ApplicationTheme

In advance, thanks for the help you can give me ...

TileView

answered on 17 Jul 2012