Questions on UI for WPF Forum

1 answer

150 views

Setting the RadComboBoxItem.Template breaks RadComboBox.DisplayMemeberPath

I already submitted a support ticket, but I just wanted to post here.

If the Template property of a RadComboBoxItem is set, then the DisplayMemberPath property of the RadComboBox will no longer display on each item in the drop down. The currently selected item will still appear correctly.

The workaround is to explicitly set the ItemTemplate property on the RadComboBox.

ComboBox

answered on 01 Nov 2013

1 answer

150 views

how to add amovable vertical line / slider/ anything parallel to y axis of line series chart in wpf

Hi,

I have a need to have a movable slider on line charts. The way it should work is as follows:

1. Slider/Cursor should be parallel to Y-axis i.e. vertical axis

2. When user moves this slider, corresponding/intersecting Y values on all graphs show up in labels just like a stock ticker chart.
3 the value of intersecting line should be displayed in label

Thanks,
avinash

Chart

answered on 01 Nov 2013

2 answers

210 views

Combine stack and cluster bars

Hello,

I wonder if it is possible to combine stack and cluster bars to have something like the image that I am attaching.

So far I can create Bar series with combine mode stack or cluster but not both.

I am creating the series in the code behind like this:

BarSeries barSer = new BarSeries();

barSer.ShowLabels = true;

barSer.CombineMode = ChartSeriesCombineMode.Stack;

// or

BarSeries barSer = new BarSeries();

barSer.ShowLabels = true;

barSer.CombineMode = ChartSeriesCombineMode.Cluster;

foreach (DataRow dr in dtData.Rows)

{

barSer.DataPoints.Add(new CategoricalDataPoint() { Category = dr["Name"], Label = string.Format("{0:N}", dr["Value"]), Value = double.Parse(dr["Value"].ToString()) });

}

Thanks in advance.

Alberto

Chart

answered on 31 Oct 2013

9 answers

676 views

trying to change theme color at runtime without success

Hi,

I have in my App a RadScheduleView. Its theme is set to Windows8Theme in xaml :

<telerik:RadScheduleView x:Name="ScheduleView"

MinTimeRulerExtent="400"

MaxTimeRulerExtent="1920"

AppointmentNavigationButtonsVisibility="Never"

ToolTipTemplate="{StaticResource AppointmentToolTipTemplate}"

telerik:StyleManager.Theme="Windows8"

GroupHeaderContentTemplateSelector="{StaticResource GroupHeaderContentTemplateSelector}"/>



this theme is definitive, but I would like to be able to change the theme's AccentColor at runtime, so I wrote a method to do this:




public static void ChangeTheme(ColorTheme theme)
{
    var app = (App)Application.Current;
    if (theme == app.CurrentTheme) return;
     
    app.Resources.MergedDictionaries.Clear();
    AddResourceDictionary("resources/Common.xaml");
    AddResourceDictionary("resources/GeneralResources.xaml");
    AddResourceDictionary("resources/MenuResources.xaml");
    AddResourceDictionary("resources/DataGridResources.xaml");
    AddResourceDictionary("resources/DatePickerResources.xaml");
 
    app.CurrentTheme = theme;
    try { AddResourceDictionary(string.Format(CultureInfo.InvariantCulture, "themes/{0}.xaml", theme)); }
    catch { AddResourceDictionary("themes/Default.xaml"); }
 
    Windows8Palette.Palette.AccentColor = (Color)Application.Current.Resources["ThemeColor"]; // pour le calendrier
 
}
 
private static void AddResourceDictionary(string source)
{
    var resourceDictionary = Application.LoadComponent(new Uri(source, UriKind.Relative)) as ResourceDictionary;
    Application.Current.Resources.MergedDictionaries.Add(resourceDictionary);
}



My issue is quite simple: the ScheduleView's color is always exactly one color late. i.e.:

let's say I have 3 theme colors : green, red, blue. Blue is the color at the beginning. I call the method to set the color to red, it stays blue. I call the method to set green, it becomes red, I call the color to set blue again, it becomes green, and so on...



can anybody tell me what I am doing wrong? I am at a complete lost as to how on earth this behaviour is possible...



Edit: I forgot a potentially usefull piece of information: this used to work with earlier versions of the telerik libraries (Q3 2012 as far as I remember). At the time, I used Windows8Colors.PaletteInstance, though, as it was not yet flagged as Obsolete.

General Discussions

answered on 31 Oct 2013

15 answers

279 views

DataForm and DataTable

I am trying to bind the DataForm ItemsSource to a DataTable. Initially the DataForm is populated, but if I try to navigate through the records, I get an error.

I have spent past hour searching for a solution, and I could not find any mention of this issue. DataForm works fine if binded to an ObservableCollection of business objects. But in this case I need it binded to a DataTable, and I cant seem to find a way to get it working.

IDE: VS2010
.Net Version: 4.0
Telerik Version: 2011.3.1220.40

I have created a sample project that recreates the same issue. The error that I receive when navigating through the records is:

The type 'DataRowView' does not contain a public property named 'DateTime'.

Parameter name: propertyName

<Window xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation" x:Class="Testing.DataForm.MainWindow"

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

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

Title="MainWindow" Height="350" Width="525">

<Grid>

<telerik:RadDataForm Name="dataForm"/>

</Grid>

</Window>

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;

using System.Data;

namespace Testing.DataForm

{

/// <summary>

/// Interaction logic for MainWindow.xaml

/// </summary>

public partial class MainWindow : Window

{

public MainWindow()

{

InitializeComponent();

GenerateSomeData();

}

private void GenerateSomeData()

{

#region Data Generator

DataTable baseTable = new DataTable();

baseTable.Columns.Add("DateTime", typeof(DateTime));

baseTable.Columns.Add("Value", typeof(decimal));

DateTime date = new DateTime(DateTime.Now.Year, 11, 1);

TimeSpan span = date.AddMonths(1).AddDays(-1) - date;

int numDays = span.Days;

int randHigh = 65;

int randLow = 0;

#region RANDOM DATA GENERATOR

Random rand = new Random();

int calculatedNumHours = 24 * numDays;

for (int hour = 1; hour <= calculatedNumHours; hour++)

{

baseTable.Rows.Add(new object[]

{

date.AddHours(hour).AddSeconds(-1),

rand.NextDouble() * ((randHigh - randLow) + randLow)

});

}

#endregion

dataForm.ItemsSource = baseTable.DefaultView;

#endregion

}

DataForm

answered on 31 Oct 2013

7 answers

300 views

Closest data point

Hello,

I'm using RadCartesianChart with multiple series (each series contains thousand of data points). I enabled ChartTrackBallBehavior (

<telerik:ChartTrackBallBehavior ShowIntersectionPoints="False" ShowTrackInfo="True" SnapMode="AllClosePoints" TrackInfoUpdated="ChartTrackBallBehavior_OnTrackInfoUpdated"/>) . Now in TrackInfoUpdated a would like find closest data point. Unfortunately property Context.ClosestDataPoint of TrackBallInfoEventArgs always returns first datapoint of first series regardless which datapoint is really closest. How can I detect really closest data point?

Thanks for help.

David

ChartView

answered on 31 Oct 2013

3 answers

118 views

RadCartesianChart '-1' is not a valid value for property 'Height'.

Hi,

I'm facing a serious problem using RadCartesianChart.

Sometimes i receive this exception :

'-1' is not a valid value for property 'Height'

.   at System.Windows.DependencyObject.SetValueCommon(DependencyProperty dp, Object value, PropertyMetadata metadata, Boolean coerceWithDeferredReference, Boolean coerceWithCurrentValue, OperationType operationType, Boolean isInternal)

at System.Windows.DependencyObject.SetValue(DependencyProperty dp, Object value)

at System.Windows.FrameworkElement.set_Height(Double value)

at Telerik.Windows.Controls.ChartView.PresenterBase.ArrangeUIElement(FrameworkElement presenter, RadRect layoutSlot, Boolean setSize)

at Telerik.Windows.Controls.ChartView.PointTemplateSeries.UpdatePresenters(ChartLayoutContext context)

at Telerik.Windows.Controls.ChartView.PointTemplateSeries.UpdateUICore(ChartLayoutContext context)

at Telerik.Windows.Controls.ChartView.PresenterBase.UpdateUI(ChartLayoutContext context)

at Telerik.Windows.Controls.ChartView.RadChartBase.UpdateUICore(ChartLayoutContext context)

at Telerik.Windows.Controls.ChartView.PresenterBase.UpdateUI(ChartLayoutContext context)

at Telerik.Windows.Controls.ChartView.RadChartBase.CallUpdateUI()

at Telerik.Windows.Controls.ChartView.RadChartBase.OnInvalidated()

at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)

at MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(Object source, Delegate method, Object args, Int32 numArgs, Delegate catchHandler)

After this exception the control stops working. Have you an idea ?

Thanks a lot by advance

ChartView

answered on 31 Oct 2013

3 answers

149 views

How to save document in my Custom format?

Hi,

I wants to save the document in my custom format.

How to save it and how to write this code.

If you provide any demo it will very helpfull to me.

Thanks
Ajita

RichTextBox

answered on 31 Oct 2013

9 answers

300 views

RadPaneGroupRegionAdapter not working for Prism 4 November release

Hi,

I downloaded the source project with the RadPaneGroupRegionAdapter from here:

Using the RadDocking control with Prism

And I updated the reference and the bootstrapper to use the Prism 4 November release. Then I found it's no longer working.

There is no exceptions, just that the RadPane's are not showing.

Following are the only code change I made, (all inside bootstrapper):

using System;

using System.Net;

using System.Windows;

using System.Windows.Controls;

using System.Windows.Documents;

using System.Windows.Ink;

using System.Windows.Input;

using System.Windows.Media;

using System.Windows.Media.Animation;

using System.Windows.Shapes;

using Telerik.Windows.Controls;

using Microsoft.Practices.Prism.UnityExtensions;

using Microsoft.Practices.Prism.Regions;

using Microsoft.Practices.Prism.Modularity;

using Microsoft.Practices.Unity;

namespace RadDockingAndPRISM

{

public class Bootstrapper : UnityBootstrapper

{

protected override RegionAdapterMappings ConfigureRegionAdapterMappings()

{

var mappings = base.ConfigureRegionAdapterMappings();

mappings.RegisterMapping(typeof(RadPaneGroup), ((IUnityContainer)Container).Resolve<RadPaneGroupRegionAdapter>());

return mappings;

}

protected override DependencyObject CreateShell()

{

Shell shell = Container.Resolve<Shell>();

#if SILVERLIGHT

App.Current.RootVisual = shell;

#else

shell.Show();

#endif

return shell;

}

//protected override IModuleCatalog GetModuleCatalog()

//{

// var catalog = new ModuleCatalog();

// catalog.AddModule(typeof(ModuleA.ModuleA));

// catalog.AddModule(typeof(ModuleB.ModuleB));

// return catalog;

//}

protected override void ConfigureModuleCatalog()

{

base.ConfigureModuleCatalog();

((ModuleCatalog)ModuleCatalog).AddModule(typeof(ModuleA.ModuleA));

((ModuleCatalog)ModuleCatalog).AddModule(typeof(ModuleB.ModuleB));

}

Could you please help? Thanks!

Docking

answered on 31 Oct 2013

1 answer

80 views

Line Series mouse events when render mode is set to Light

Is there any way to subscribe to mouse events on a line series that is rendered in light mode? I tried testing some mouse events (enter, move, leave, mousedown) and they work when the line series is set to full mode, but not when it's light. I've been wondering if this is because of a lack of a clickable area in the extremely thinly rendered line series or if it's because of the mechanism in which a light series is rendered.

If there's documentation about what is available/unavailable when the series is rendered in Light Mode, could I be linked to it? Thank you!

ChartView

answered on 31 Oct 2013