Questions on UI for WPF Forum

1 answer

374 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

91 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

223 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

238 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

159 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

158 views

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

1 answer

66 views

Get the binding object for details template

Hi,

I have a gridview, whose itemsource is set to collection of objects. Now when the row is selected, the details template is shown. Upon clicking on the details template another window is shown. I wish to pass the object , to which the details template is bound to this new window. How do I get the data bound object?

GridView

answered on 17 Jul 2012

2 answers

95 views

Iterating over grid view rows

Hi,

Is there any way to iterate over the radGridView rows in a custom method?Because I need to cutomize some cells data at run time,I can do the same in row loading event,but I need to do it in my own method.

Please let me know if this is possible.

Thanks in Advance . . .

GridView

answered on 17 Jul 2012

11 answers

640 views

How to apply a theme to a non-rad control?

Hi,

I'm using RadControls for WPF 2010 Q1 and I'm trying to apply a theme to non-rad controls. How can I accomplish that? I tried to use the 'StyleManager.Theme' property, but that seems to "hide" the control instead of applying the theme.

Here is the xaml snippet:

    
                    <StatusBar DockPanel.Dock="Bottom" telerik:StyleManager.Theme="Office_Blue"> 
        
                        <StatusBar.ItemsPanel> 
        
                            <ItemsPanelTemplate> 
        
                                <Grid> 
        
                                    <Grid.ColumnDefinitions> 
        
                                        <ColumnDefinition Width="*"/> 
        
                                        <ColumnDefinition Width="Auto"/> 
        
                                    </Grid.ColumnDefinitions> 
        
                                </Grid> 
        
                            </ItemsPanelTemplate> 
        
                        </StatusBar.ItemsPanel> 
        
                        <TextBlock>Left Side</TextBlock> 
        
                        <StatusBarItem Grid.Column="1"> 
        
                            <TextBlock>Right Side</TextBlock> 
        
                        </StatusBarItem> 
        
                    </StatusBar>

Thanks in advance,

Wagner

General Discussions

answered on 16 Jul 2012

5 answers

105 views

Special Slots and Custom Grouping

Hi,
I followed more or less the example "Special and Read-only Slots"
in order to achieve the desired behavior (show working hours in a different color).
As you can see in the first screen shot (sched01.png), everything works fine.

As soon as I use custom grouping, the working hours are no more visible (see sched02.png).
After deselecting the group item (here: Zimmer 315), the working hours for the selected person are displayed again.

Your help is highly appreciated.

Regards,
Daniel

ScheduleView

answered on 16 Jul 2012