Questions on UI for WPF Forum

1 answer

202 views

Hello

I have the following situation:

If the Scale factor is not set as auto, when you click on the canvas resize button, the factor goes to 1, showing the whole image.

You can try this using the demo Image Editor:

1. Open the Image Editor demo
2. Load a large image (1024x768?)
3. Change the zoom from auto to any other value
4. Click on Canvas Resize
Observe that the factor now is 1 (100%).

Now if you repeat the same instructions, it won't happen again.

Any ideas?

ImageEditor

answered on 10 May 2014

1 answer

209 views

MajorYLineDashArray & MajorLinesVisibility in RadCartesianChart

My code is below that

<chartView:CartesianChartGrid MajorLinesVisibility="{Binding Ribbon.AxisGrid, Converter={StaticResource axisConverter}}">

<telerik:CartesianChartGrid.Style>
<Style TargetType="telerik:CartesianChartGrid">
<Setter Property="MajorXLineDashArray"
Value="{Binding Ribbon.AxisGridLine, Converter={StaticResource axisConverter}}"/>
<Setter Property="MajorYLineDashArray"
Value="{Binding Ribbon.AxisGridLine, Converter={StaticResource axisConverter}}"/>
</Style>
</telerik:CartesianChartGrid.Style>

................

<telerik:CategoricalSeriesDescriptor.Style>
<Style TargetType="chartView:LineSeries">
<Setter Property="VerticalAxis" Value="{Binding Data, Converter={StaticResource additionalVerticalAxisConverter}}"/>
</Style>
</telerik:CategoricalSeriesDescriptor.Style>

I do setting 'MajorYLineDashArray & MajorLinesVisibility'.

But my program does not appear 'MajorLine'

What should I do?

Additionally, attached file

Chart

answered on 10 May 2014

1 answer

61 views

Questions when using RadGridView

good day,
bought lincença to utlização of some components of Telerik, first I'm going to use and add the RadGridView, but I have some difficulties and doubts.

1. FilteringMode = FilterRow
2. FilterOperator = StartsWith
. 3 Using wildcard expressions to filter every textbox to filter EXAMPLE: Like the SQL Server.

- Now I need to navigate between 'TextBox' filter using the Left and Right keyboard keys.
- Focus to 'Focus' in 'Grid' to "Down" keys, key but I have no idea how to do this.

graciously
André

GridView

answered on 09 May 2014

1 answer

240 views

Custom Sort a column: Sort/Group/FilterMemberPath containing indexer expression

I'm building a way to generate columns based on an IEnumerable inside a ViewModel bound to a single row.
When creating a cell element, the DataContext of that element is set to something based on a property path.

Consider the following example:

class Order {

public List<OrderLine> Lines { get; }

}

class OrderLine {

        public int Index { get; }

public string Data { get; }

}

A GridViewRow would be bound to an Order object.
For each line in this example a column will be created.

To achieve this, I created a custom column:

public override FrameworkElement CreateCellElement(GridViewCell cell, object dataItem)

{

// more code to create item etc.

item.SetBinding(FrameworkElement.DataContextProperty,

new Binding(DataMemberBindingPath) { Source = dataItem });

}

The DataMemberBindingPath contains something like Lines[0] or Lines[1]. This works fine since the WPF data binding engine can handle this. When I try to define the SortMemberPath containing an Indexer, nothing happens and the expression does not seem to be parsed.

Looking at the GridViewColumn source code, there is a method of interest:

internal virtual Expression CreateSortKeyExpression(ParameterExpression parameterExpression, ExpressionBuilderOptions options)

{

var builder = CreateBuilder(parameterExpression, this.EffectiveSortMemberType, this.EffectiveSortMemberPath, options);

return builder.CreateMemberAccessExpression();

}

However the method is Internal and I cannot override this to allow working with indexers.

Is there any workaround available to override the sort behavior for a custom column?

GridView

answered on 09 May 2014

4 answers

218 views

RadRibbonView.Backstage open in Windows but not in Page

Dear customer support,
I am not sure if this is a bug or it is suppose to work by this way. Here is the code of whole RadRibbonView:
http://pastebin.com/eLKRbZba

And please see this video: https://www.youtube.com/watch?v=m_s0HSMgpK4&feature=youtu.be

First time when I run the project I open the code above in Window and as you see it works.
Then I change it to what I need. The structure is Windows with RadBusyIndicator + Frame where I navigate to Login Page. When user is login the frame navigate to the main program again it is Page. This is the exactly same code in pastebin. As you see when I click ApplicationButton the Backstage not open anymore.

This is a bug or it is suppose to not work in Page?

Best regards,
Saykor

RibbonView and RibbonWindow

answered on 09 May 2014

1 answer

153 views

visualizationlayer

Hello.

I have a sql server Table which contains some geometry data ( about 150 points), a column with the color to applied on these points, and a label.

I need to display these points on my map with the right color and the corresponding label.

I'm new in WPF and telerik objects. If you can explain to me what object I should use (MapPinPoint, MapEllipse. i am lost with your different points objects. And i don't see how I can change the color of a particular point in code behind

Map

answered on 09 May 2014

3 answers

273 views

LabelTemplate and RelativeSource Binding Strangeness

I've come across a strange problem when trying to use RelativeSource binding in the DataTemplate used for styling the LabelTemplate of an axis. When RelativeSource binding is used, the labels are drawn over the left side of the chart instead of to the left.

Below is the code for a simple example exhibiting the problem. (It's obviously a convoluted example since the numbers are all being set to the same value. In my real application I experienced the problem using MultiBinding to pass in some settings as well as the value, but this simpler example shows the same symptoms with single Binding).

If I bind to the Property using ElementName, it displays correctly. However, if I reference the exact same property using RelativeSource, the value is picked up successfully, but the labels are displayed incorrectly. See attached screen shot.

I have a work-around by using the ElementName, but ideally I'd like to use the RelativeSource instead to reference the owning ChartView such that the formatter can be put in a dictionary and used across several charts without having to assign them all the same name.

Thanks,
Louis

The sample app:

<Window x:Class="LabelTemplate_MultiBinding.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"

xmlns:local="clr-namespace:LabelTemplate_MultiBinding"

Title="MainWindow" Height="768" Width="1024">

<Grid>

<telerik:RadCartesianChart x:Name="PropertyChart">

<telerik:RadCartesianChart.Resources>

<local:ChartNumberFormatter x:Key="NumberFormatter"/>

<DataTemplate x:Key="FormattedNumericAxisTemplate">

<!-- This uses the converter sending some value via binding using ElementName,

and it works fine -->

<!--<TextBlock Text="{Binding Path=DataContext.JustANumber,

Converter={StaticResource NumberFormatter},

ElementName=PropertyChart}" />-->

<!-- This uses the converter sending the same value as above via binding,

but using RelativeSource instead, and it displays incorrectly! -->

<TextBlock Text="{Binding Path=DataContext.JustANumber,

Converter={StaticResource NumberFormatter},

RelativeSource={RelativeSource AncestorType={x:Type telerik:RadCartesianChart}}}" />

</DataTemplate>

</telerik:RadCartesianChart.Resources>

<telerik:RadCartesianChart.HorizontalAxis>

<telerik:DateTimeCategoricalAxis/>

</telerik:RadCartesianChart.HorizontalAxis>

<telerik:RadCartesianChart.VerticalAxis>

<telerik:LinearAxis LabelTemplate="{StaticResource FormattedNumericAxisTemplate}" />

</telerik:RadCartesianChart.VerticalAxis>

<telerik:RadCartesianChart.Series>

<telerik:LineSeries

CategoryBinding="Date"

ValueBinding="Value"

ItemsSource="{Binding Path=Series1}">

</telerik:LineSeries>

</telerik:RadCartesianChart.Series>

</telerik:RadCartesianChart>

</Grid>

</Window>

The code-behind:

using System;

using System.Collections.Generic;

using System.Windows;

using System.Windows.Data;

namespace LabelTemplate_MultiBinding

{

public class MyPoint

{

public DateTime Date { get; set; }

public Double Value { get; set; }

}

public partial class MainWindow : Window

{

public List<MyPoint> Series1 { get; private set; }

public string DisplaySuffix { get; private set; }

public double JustANumber { get; private set; }

public MainWindow()

{

Series1 = new List<MyPoint>();

DisplaySuffix = "M";

JustANumber = 50000;

for (int i = 0; i < 5; i++)

{

DateTime date = DateTime.Today.AddDays(i);

Series1.Add(new MyPoint() { Date = date, Value = i * 1000 });

}

InitializeComponent();

DataContext = this;

}

public class ChartNumberFormatter : IValueConverter

{

public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)

{

double number = System.Convert.ToDouble(value);

return number.ToString("N0");

}

public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)

{

throw new NotImplementedException();

}

ChartView

answered on 09 May 2014

4 answers

222 views

GridViewComboBoxColumn Binding Indexer

Hi,

In My ViewModel I have: public ObservableCollection<OrderModel> Orders { get; set; }

In OrderModel have: public IEnumerable<utOrderItem> OrderItems { get; set; }

I try to bind this OrderItems to a GridViewComboBoxColumn in RadGridView just to list them:

<telerik:RadGridView Grid.Row="1" Name="grdOrders" ItemsSource="{Binding Orders}" .............

<telerik:GridViewComboBoxColumn ItemsSource="{Binding Orders[].OrderItems}" Header="Order Items">
<telerik:GridViewComboBoxColumn.ItemTemplate>
<DataTemplate>
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="Auto"/>
</Grid.ColumnDefinitions>
<TextBlock Grid.Column="0" Text="{Binding Quantity}" />
<TextBlock Grid.Column="1" Text="{Binding ItemType}" />
<TextBlock Grid.Column="2" Text="{Binding UnitPrice}" />
</Grid>
</DataTemplate>
</telerik:GridViewComboBoxColumn.ItemTemplate>
</telerik:GridViewComboBoxColumn>

<telerik:GridViewDataColumn DataMemberBinding="{Binding OrderItems.Count}" Header="Order Item Count"/>

Column "Order Items" not show anything
Column "Order Item Count" works

Please advise how I can bind collection that exist in every record?

Best regards,
Saykor

GridView