Questions on UI for WPF Forum

7 answers

217 views

Hi!

Have you guys already tried your PDF viewer control on the Win8 community preview ?
We're trying to port an app to Win8 and are unable to get PDF viewer performance under WPF anywhere near the integrated Win8 viewer.

Are we doing something wrong or is there a performance issue with WPF and the touch interface ?

Thanks

Martin

PDFViewer

answered on 19 Sep 2013

1 answer

145 views

BusyIndicator Disables Hyperlinks in DataGrid

Hi, I've encountered an issue when a DataGrid is placed inside a RadBusyIndicator (most current build of WPF Controls), a hyperlink in a column in the grid will be disabled.

Here's quick sample of code to demonstrate the problem...

<Window

xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

xmlns:TestAppWpf="clr-namespace:TestApp_WPF"

xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation"

xmlns:i="http://schemas.microsoft.com/expression/2010/interactivity"

xmlns:ei="http://schemas.microsoft.com/expression/2010/interactions"

x:Class="TestApp_WPF.MainWindowView"

x:Name="window"

Width="800" Height="600"

TextOptions.TextFormattingMode="Display"

AllowDrop="True">

<Window.Resources>

<TestAppWpf:MainWindowViewModel x:Key="Vm" />

</Window.Resources>

<telerik:RadBusyIndicator DataContext="{Binding Source={StaticResource Vm}}"

IsBusy="{Binding IsBusy, Mode=OneWay}"

BusyContent="{Binding BusyContent, Mode=OneWay}">

<StackPanel Margin="6" DataContext="{Binding Source={StaticResource Vm}}">

<TextBlock Margin="3">

<Hyperlink>

<i:Interaction.Triggers>

<i:EventTrigger EventName="Click">

<ei:CallMethodAction TargetObject="{Binding}" MethodName="DoWork" />

</i:EventTrigger>

</i:Interaction.Triggers>

<TextBlock Text="Click Me" />

</Hyperlink>

</TextBlock>

<DataGrid Margin="3"

ItemsSource="{Binding Items}"

SelectedItem="{Binding SelectedItem}"

AutoGenerateColumns="False"

SelectionUnit="FullRow"

SelectionMode="Single"

CanUserDeleteRows="False"

CanUserAddRows="False"

IsReadOnly="True"

AllowDrop="True">

<DataGrid.Columns>

<DataGridTextColumn Binding="{Binding FirstName}" />

<DataGridTextColumn Binding="{Binding LastName}" />

<DataGridTextColumn Binding="{Binding DOB}" />

<DataGridTemplateColumn x:Name="uxColumn_Edit"

CanUserSort="False">

<DataGridTemplateColumn.CellTemplate>

<DataTemplate>

<TextBlock Margin="3">

<Hyperlink>

<i:Interaction.Triggers>

<i:EventTrigger EventName="Click">

<ei:CallMethodAction

TargetObject="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=DataGrid}, Path=DataContext}"

MethodName="DoWork" />

</i:EventTrigger>

</i:Interaction.Triggers>

<TextBlock Text="Edit" />

</Hyperlink>

</TextBlock>

</DataTemplate>

</DataGridTemplateColumn.CellTemplate>

</DataGridTemplateColumn>

</DataGrid.Columns>

</DataGrid>

</StackPanel>

</telerik:RadBusyIndicator>

</Window>

and the view model...

using System;

using System.Collections.ObjectModel;

using System.ComponentModel;

using System.Threading;

using System.Threading.Tasks;

namespace TestApp_WPF

{

public class MainWindowViewModel : INotifyPropertyChanged

{

#region Fields

private bool _isBusy;

private string _busyContent;

public event PropertyChangedEventHandler PropertyChanged;

protected virtual void OnProperyChanged(string propertyName)

{

if (PropertyChanged != null)

PropertyChanged(this, new PropertyChangedEventArgs(propertyName));

}

public ObservableCollection<Person> _items;

public Person _selectedItem;

#endregion

#region Properties

/// <summary>

/// Gets or sets a value indicating whether [is busy].

/// </summary>

/// <value>

/// <c>true</c> if [is busy]; otherwise, <c>false</c>.

/// </value>

public bool IsBusy

{

get { return _isBusy; }

set

{

if (_isBusy == value)

return;

_isBusy = value;

OnProperyChanged("IsBusy");

}

/// <summary>

/// Gets or sets the content of the busy.

/// </summary>

/// <value>

/// The content of the busy.

/// </value>

public string BusyContent

{

get { return _busyContent; }

set

{

if (_busyContent == value)

return;

_busyContent = value;

OnProperyChanged("BusyContent");

}

/// <summary>

/// Gets the items.

/// </summary>

/// <value>

/// The items.

/// </value>

public ObservableCollection<Person> Items

{

get

{

if (_items == null)

{

_items = new ObservableCollection<Person>

{

new Person

{

FirstName = "John",

LastName = "Doe",

DOB = new DateTime(1972, 5, 9),

},

new Person

{

FirstName = "Jim",

LastName = "Smith",

DOB = new DateTime(1954, 12, 15),

}

};

}

return _items;

}

/// <summary>

/// Gets or sets the selected item.

/// </summary>

/// <value>

/// The selected item.

/// </value>

public Person SelectedItem

{

get { return _selectedItem; }

set

{

if (_selectedItem == value)

return;

_selectedItem = value;

OnProperyChanged("SelectedItem");

}

#endregion

#region Methods

public void DoWork()

{

Task.Factory.StartNew(

() =>

{

IsBusy = true;

BusyContent = "Working...";

Thread.Sleep(5000);

IsBusy = false;

});

}

#endregion

}

public class Person

{

public string FirstName { get; set; }

public string LastName { get; set; }

public DateTime DOB { get; set; }

}

As you'll see, the hyperlinks in the datagrid's "edit" column are disabled. However, if you comment out the RadBusyIndicator (and it's closing tag), the "edit" column will then be enabled. Also, if it helps, if you change the datagrid to "IsReadOnly=False", then an edit hyperlink will become enabled if you double click on it.

As you can also see, the hyperlink at the top of the window that is not part of the datagrid is unaffected by this issue.

Thanks,
Andy

BusyIndicator

answered on 19 Sep 2013

8 answers

265 views

[Solved] RadTreeListView problem with AlternateRowBackground or AlternateRowStyle

Hello,

I have a problem with setting AlternateRowBackground or AlternateRowStyle for RadTreeListView. It occures only when vertical scroll bar is visible.

When I put hierarchical data into RadTreeListView and begin to expand and collapse parent rows alternation coloring becomes broken. So I get a pair of rows with the same color instead of iterating.

There's a screenshot of the result in the attach.

The code is very simple:

<telerik:RadTreeListView ItemsSource="{Binding Path=TestData}"

AlternationCount="2"

AlternateRowBackground="DarkGray">

<telerik:RadTreeListView.ChildTableDefinitions>

<telerik:TreeListViewTableDefinition ItemsSource="{Binding Path=Children}" />

</telerik:RadTreeListView.ChildTableDefinitions>

</telerik:RadTreeListView>

TreeListView

answered on 19 Sep 2013

1 answer

134 views

TreeView animation blur

Hi, I have problem, When I expand node in my treeview my text (TreeViewItems Header) gets blured, I am using in animation (on collapsed out animation)

<Setter Property="telerik:AnimationManager.AnimationSelector">

<Setter.Value>

<telerik:AnimationSelector>

<Animation:TreeViewExpandCollapseAnimation AnimationTargetName="ItemsHost" AnimationName="Expand" Direction="In" Duration="00:00:01" SpeedRatio="3" TargetName="{x:Null}"/>

<Animation:TreeViewExpandCollapseAnimation AnimationTargetName="ItemsHost" AnimationName="Collapse" Direction="Out" Duration="00:00:01" SpeedRatio="3" TargetName="{x:Null}"/>

</telerik:AnimationSelector>

</Setter.Value>

</Setter>

TreeView

answered on 19 Sep 2013

1 answer

64 views

Change check state in Hierarchy

Hi, i want to edit a checkbox in hierarchy but it doesnt happend, Is that posible? Thanks

GridView

answered on 19 Sep 2013

7 answers

380 views

Map pinpoint on mouse click

Hi,

Is it possible to add a map pin point on a mouse click event,using the mvvm pattern?

Thanks

Map

answered on 19 Sep 2013

0 answers

72 views

please it's urgent

It is related to: http://www.telerik.com/community/forums/wpf/general-discussions/calling-a-udf-for-populating-a-radgridview-fails.aspx

Without setting a precedent.. I really very appreciated your help.

General Discussions

asked on 18 Sep 2013

2 answers

225 views

How to Change the Watermark Text?

I'm looking to add custom text for the watermark when no value is present.
Seems there is some support for the DateTime picker but not the TimePicker?

Thanks

TimePicker

answered on 18 Sep 2013

0 answers

159 views

Image not shown

Hi,
I'm trying to convert the HTML format that has an image to the RTF format:
I use the following codes to get a string of RTF and then bind it

Dim content As String = "<img src='c:\image1.png'/>"

Dim htmlProvider As New HtmlFormatProvider()

Dim raddoc As RadDocument = htmlProvider.Import(content)

Dim rtfProvider As New RtfFormatProvider()

Dim rtf As String = rtfProvider.Export(raddoc)

XMAL

<telerikRTF:RtfDataProvider Rtf="{Binding rtf}" RichTextBox="{Binding ElementName=rrtb}" />

<telerik:RadRichTextBox Grid.Row="1" Name="rrtb" />

Note the xmal code is referred from this thread http://www.telerik.com/community/forums/wpf/richtextbox/create-an-instance-of-richtextbox.aspx

So what I get when running the application is the red X image (see attached file).
Could you please advise or give me basic sample of code to address this problem?

Thanks,
Brew

RichTextBox

asked on 18 Sep 2013

1 answer

433 views

Max and min for DateTimeCategoricalAxis

Hi,

I'm rather new to the ChartView component, so bear with me.

I have a RadCartesianChart that displays runtime values (a double and a DateTime essentially) on a LineSeries and is refreshed roughly once a second. The horizontal axis is a DateTimeCategoricalAxis and the vertical axis is a LinearAxis. The application is set up so that the user can display values from the last 30 seconds, 1 minute, 5 minutes or 30 minutes. However, as far as I can see, there is no way to force the chart to display a set time span, e.g. from DateTime.Now-30 seconds to DateTime.Now. Rather, the chart renders the horizontal axis according to what's in the data.

To accommodate this, I have had to implement logic that pushes and pops values from the databound ItemsSource so that it contains roughly the amount of values that I want to plot (30 seconds, 1 minute etc). However, as there is no guarantee that values come in at a fixed interval and "on the second", this results in the horizontal axis and chart as a whole "shifting about" a bit. It's also somewhat computationally intensive.

Is there any way to archive what I'm after using the RadCartesianChart?

Best regards,
Rickard

ChartView

answered on 18 Sep 2013