Questions on UI for WPF Forum

1 answer

155 views

Custom aggregate for QueryableDataProvider

Hi!

There is any way to create custom aggregate for QueryableDataProvider?

I want to create CustomDistinct aggregate, I did it successfully for LocalDataSourceProvider, and I need it also for QueryableDataProvider.

Here is my code, unfortunately, it is not working at all..

Hi!
There is any way to create custom aggregate for QueryableDataProvider?
I want to create CustomDistinct aggregate, I did it successfully for LocalDataSourceProvider, and I neet also for QueryableDataProvider.
Here is my code, unfurtonately, it is not working at all..

I see "CountDistinct" in "More aggregate options" window, but when i choose it, the pivot got an error.

using System;

using System.Collections.Generic;

using System.Linq;

using System.Linq.Expressions;

using Telerik.Pivot.Core;

using Telerik.Pivot.Core.Fields;

using Telerik.Pivot.Queryable;

namespace YA.Pivot.Queryable

{

public class MyQueryableDataProvider : QueryableDataProvider

{

protected override void OnPrepareDescriptionForField(PrepareDescriptionForFieldEventArgs args)

{

base.OnPrepareDescriptionForField(args);

if (args.DescriptionType == DataProviderDescriptionType.Aggregate)

{

var old = args.Description as QueryablePropertyAggregateDescriptionBase;

args.Description = new CustomPropertyAggregateDescription()

{

PropertyName = old.PropertyName,

FunctionName = old.FunctionName,

AggregateFunction = old.AggregateFunction,

CustomName = old.CustomName,

StringFormat = old.StringFormat

};

}

internal class CustomPropertyAggregateDescription : QueryablePropertyAggregateDescriptionBase

{

private enum MyAggregateFunctions

{

CountDistinct = -100

}

protected override Cloneable CreateInstanceCore()

{

return new CustomPropertyAggregateDescription()

{

AggregateFunction = this.AggregateFunction,

CustomName = this.CustomName,

FunctionName = this.FunctionName,

PropertyName = this.PropertyName,

StringFormat = this.StringFormat,

StringFormatSelector = this.StringFormatSelector,

TotalFormat = this.TotalFormat

};

}

private bool IsCountDistinct => (int)base.AggregateFunction == (int)MyAggregateFunctions.CountDistinct;

protected override Expression CreateAggregateExpression(Expression enumerableExpression, string aggregatedValueName)

{

if (enumerableExpression == null)

{

throw new ArgumentNullException(nameof(enumerableExpression));

}

if (IsCountDistinct)

{

return CreateCountDistinctExpression(enumerableExpression, aggregatedValueName);

}

return base.CreateAggregateExpression(enumerableExpression, aggregatedValueName);

}

private Expression CreateCountDistinctExpression(Expression enumerableExpression, string aggregatedValueName)

{

Type itemType = TypeExtensions.ExtractItemTypeFromEnumerableType(enumerableExpression.Type);

var selectParamExp = Expression.Parameter(itemType, "e");

var selectPropAccessExp = Expression.Property(selectParamExp, aggregatedValueName);

LambdaExpression selectLambdaExpression = Expression.Lambda(selectPropAccessExp, selectParamExp);

var select = Expression.Call(

typeof(Enumerable),

"Select",

new[] { itemType, selectLambdaExpression.Body.Type },

enumerableExpression,

selectLambdaExpression);

var distinct = Expression.Call(

typeof(Enumerable),

"Distinct",

new[] { selectLambdaExpression.Body.Type },

select);

var count = Expression.Call(

typeof(Enumerable),

"Count",

new[] { selectLambdaExpression.Body.Type },

distinct);

return count;

}

protected override IEnumerable<object> SupportedAggregateFunctions =>

base.SupportedAggregateFunctions.Concat(new object[] { MyAggregateFunctions.CountDistinct });

}

internal static class TypeExtensions

{

public static Type ExtractItemTypeFromEnumerableType(Type type)

{

var enumerableType = type.FindGenericType(typeof(IEnumerable<>));

if (enumerableType == null)

{

throw new ArgumentException("Provided type is not IEnumerable<>", nameof(type));

}

return enumerableType.GetGenericArguments().First();

}

private static Type FindGenericType(this Type type, Type genericType)

{

while (type != null && type != typeof(object))

{

if (type.IsGenericType && type.GetGenericTypeDefinition() == genericType)

{

return type;

}

if (genericType.IsInterface)

{

foreach (Type intfType in type.GetInterfaces())

{

Type found = intfType.FindGenericType(genericType);

if (found != null)

{

return found;

}

type = type.BaseType;

}

return null;

}

PivotGrid

answered on 07 Mar 2017

3 answers

219 views

ColumnFilterDescriptor not working on RadGridView

I have used RadGridView with data collection binded to it.

When I try to search for value in selected column with Filter pop up, on selected column,

I am able to filter collection with checkbox selection.

But when I enter value in the pop textbox and press filter button.

It is not filtering the collection.

I have checked both Distinct and filed filter properties of ColumnFilterDescriptor .It seems to look correct .

Can anybody please help me out to solve the problem?

GridView

answered on 06 Mar 2017

8 answers

1.6K+ views

override textbox style

Hello Telerik,

I wanted to do something similar as this:

<telerik:RadWatermarkTextBox WatermarkContent="{Resx WatermarkTextBox_AddNew }"

Visibility="{Binding IsNew, Converter={StaticResource VisibilityConverter}}">

<telerik:RadWatermarkTextBox.WatermarkTemplate>

<DataTemplate>

<TextBlock Style="{StaticResource TextBlockValueDefaultStyle}" Text="{Binding}" />

</DataTemplate>

</telerik:RadWatermarkTextBox.WatermarkTemplate>

</telerik:RadWatermarkTextBox>

but for the TextBox part of the control

is there an easy way to do so?

Thank you

WatermarkTextBox

answered on 06 Mar 2017

10 answers

188 views

RadWindow System.ArgumentOutOfRangeException

when using radwindow.alert, there is a small probability case to throw an System.ArgumentOutOfRangeException,

is any solution to avoid this ?

General Discussions

answered on 06 Mar 2017

7 answers

429 views

Custom smart labels

I want to change color of smart label.

but I don't find example...

please help me...

ChartView

answered on 06 Mar 2017

1 answer

111 views

Multiple monitor set-up: Load RadPane after it being saved on a disabled or not available monitor

Hi,

I'm working with RadDocking on a multiple monitor set-up. Let's consider the following scenario:

1. I open my application.

2. I have my View containing RadDocking on a monitor.

3. I drag a RadPane to another monitor.

4. I save the layout using a XML file.

5. I close my application.

6. I disable/unplug the monitor on which I've dragged the RadPane.

7. I open my application, load the layout from that XML and the dragged RadPane doesn't show.

Code-wise at this point, even though that RadPane isn't showing, it still exists and has content.

I'm using RadDocking_PaneStateChange() to get that RadPane and I'm using this to determine if it was saved on that disabled monitor:

bool outOfBounds = (location.X <= SystemParameters.VirtualScreenLeft - screen.Bounds.Width) || (location.Y <= SystemParameters.VirtualScreenTop - screen.Bounds.Height) || (SystemParameters.VirtualScreenLeft + SystemParameters.VirtualScreenWidth <= location.X) || (SystemParameters.VirtualScreenTop + SystemParameters.VirtualScreenHeight <= location.Y);

Is there an inbuilt method that does this for me? If not, could you suggest a better approach, please? :)

Best regards,

Marius

Docking

answered on 06 Mar 2017

2 answers

403 views

Binding a tooltip on each bar

Hello Telerik,

I am having an issue trying to find a way to add a tooltip to each bar in a barseries control.

I have browsed different solutions for it, but none seem to work.

long story short, here is my code

<telerik:RadCartesianChart Loaded="chart_Loaded" x:Name="chart" Palette="{StaticResource ActualTargetChartPalette}" ClipToBounds="False">

<telerik:RadCartesianChart.VerticalAxis>

<telerik:CategoricalAxis IsInverse="True"

MajorTickStyle="{StaticResource TransparentTickStyle}"

LineStroke="Transparent"

LabelStyle="{StaticResource TextBlockTrendStyle}" />

</telerik:RadCartesianChart.VerticalAxis>

<telerik:RadCartesianChart.HorizontalAxis>

<telerik:LinearAxis ShowLabels="False" ElementBrush="Transparent" />

</telerik:RadCartesianChart.HorizontalAxis>

<telerik:RadCartesianChart.Behaviors>

My attempt ---><telerik:ChartTooltipBehavior />

</telerik:RadCartesianChart.Behaviors>

<telerik:RadCartesianChart.Series>

<telerik:BarSeries CategoryBinding="ItemTypeTranslated"

ValueBinding="Actual"

ItemsSource="{Binding ReportingSummaryOrderingTrendDTO.TrendItems}"

CombineMode="None"

ShowLabels="False"

ClipToPlotArea="False" ToolTipOpening="BarSeries_ToolTipOpening"

sdk:ChartAnimationUtilities.CartesianAnimation="Rise">

<telerik:BarSeries.TooltipTemplate>

<ItemContainerTemplate>

My attempt -----> <TextBlock Text="{Binding ItemToolTip}" ></TextBlock>

</ItemContainerTemplate>

</telerik:BarSeries.TooltipTemplate>

<telerik:BarSeries.PointTemplate>

<DataTemplate>

<Rectangle Fill="{StaticResource ActualBrush}" Margin="0 0 0 3" />

</DataTemplate>

</telerik:BarSeries.PointTemplate>

<telerik:BarSeries.LegendSettings>

<telerik:SeriesLegendSettings Title="{Resx ChartLegend_Actual}" MarkerGeometry="{StaticResource SolidRectLegendGeometry}" />

</telerik:BarSeries.LegendSettings>

<telerik:BarSeries.LabelDefinitions>

<telerik:ChartSeriesLabelDefinition Binding="Actual" Format="{}{0:F1}" DefaultVisualStyle="{StaticResource TextBlockTrendStyle}" Strategy="{StaticResource RightAlignedLabelStrategy}" />

</telerik:BarSeries.LabelDefinitions>

</telerik:BarSeries>

<telerik:BarSeries CategoryBinding="ItemTypeTranslated"

ValueBinding="Target"

ItemsSource="{Binding ReportingSummaryOrderingTrendDTO.TrendItems}"

CombineMode="None"

sdk:ChartAnimationUtilities.CartesianAnimation="Rise">

<telerik:BarSeries.PointTemplate>

<DataTemplate>

<Rectangle Fill="{StaticResource TargetBrush}" Height="2" VerticalAlignment="Bottom" />

</DataTemplate>

</telerik:BarSeries.PointTemplate>

<telerik:BarSeries.LegendSettings>

<telerik:SeriesLegendSettings Title="{Resx ChartLegend_Target}" MarkerGeometry="{StaticResource LineSeriesLegendGeometry}" />

</telerik:BarSeries.LegendSettings>

</telerik:BarSeries>

</telerik:RadCartesianChart.Series>

</telerik:RadCartesianChart>

<telerik:RadLegend Grid.Column="1" Grid.Row="1" Margin="24,4,0,0" MinWidth="76" Items="{Binding LegendItems, ElementName=chart}" />

I have attached a picture showing where the tooltip should show

thank you for your time

Chart

answered on 06 Mar 2017

8 answers

945 views

Showing Tooltip no matter the control is disabled or not

Why is the tooltip disappeared when the control is disabled? For example, in the RadRichTextBox example you posted online (a mimic of Word), when buttons in the ribbon/toolbar are disabled, the tooltip does not work. I need the behavior in Word – the tooltip is always showing no matter the button is disabled or not. How should I do that? Thank you!

ToolTip

answered on 06 Mar 2017

6 answers

1.2K+ views

Can't get IsEnabled on Item to work

I've had a standard ComboBox working with this code:

<ComboBox

x:Name="comboWindow1"

SelectedValue="{Binding Window1Page}"

ItemsSource="{Binding listDashData, UpdateSourceTrigger=PropertyChanged}"

DisplayMemberPath="ddDashDescription"

SelectedValuePath="ddDashName"

SelectionChanged="comboWindow1_SelectionChanged">

<ComboBox.ItemContainerStyle>

<Style TargetType="{x:Type ComboBoxItem}">

<Setter Property="IsEnabled" Value="{Binding ddDashEnabled}"/>

</Style>

</ComboBox.ItemContainerStyle>

</ComboBox>

I switched over to the RadComboBox, thinking I could do almost exactly the same thing. However when I select the drop down, I get no items. If I remove the ContainerStyle then that works a treat.

I've looked at the various examples in the help, but nothing seems to work.

Both these code examples fail:

<UserControl.Resources>

<Style x:Key="ComboIsEnabledStyle" TargetType="{x:Type tel:RadComboBoxItem}">

<Setter Property="IsEnabled" Value="{Binding ddDashEnabled}"/>

</Style>

</UserControl.Resources>

<tel:RadComboBox

x:Name="comboWindow2"

SelectedValue="{Binding Window2Page}"

ItemsSource="{Binding listDashData, UpdateSourceTrigger=PropertyChanged}"

DisplayMemberPath="ddDashDescription"

SelectedValuePath="ddDashName"

ItemContainerStyle="{StaticResource ComboIsEnabledStyle}"

SelectionChanged="comboWindow2_SelectionChanged">

</tel:RadComboBox>

<tel:RadComboBox

x:Name="comboWindow1"

SelectedValue="{Binding Window1Page}"

ItemsSource="{Binding listDashData, UpdateSourceTrigger=PropertyChanged}"

DisplayMemberPath="ddDashDescription"

SelectedValuePath="ddDashName"

SelectionChanged="comboWindow1_SelectionChanged">

<tel:RadComboBox.ItemContainerStyle>

<Style TargetType="{x:Type tel:RadComboBoxItem}">

<Setter Property="IsEnabled" Value="{Binding ddDashEnabled}"/>

</Style>

</tel:RadComboBox.ItemContainerStyle>

</tel:RadComboBox>

I amended one of the Telerik ComboBox examples to demonstrate as that does exactly the same thing. Can't attach, so it's available here: ComboBoxCustomFilteringDemo.zip

I'm really stumped as to what I've missed, as this should really be such a simple thing to do.

BTW I'm running the latest 2015.1.225 WPF version

ComboBox

answered on 06 Mar 2017

3 answers

744 views

Custom Clipboard Format for Copy\Paste

We have an application in which we would like to support a custom clipboard format for copying\pasting in a RadRichTextBox. I have read your article on clipboard support (http://docs.telerik.com/devtools/wpf/controls/radrichtextbox/features/clipboard-support), but that seems to mainly deal with changing which provided clipboard formats are used.

It appears that if I register a custom format provider with ClipboardEx, that would be able to handle pasting the custom format. For example:

ClipboardEx.ClipboardHandlers.Insert(0, new ClipboardHandler()

{

ClipboardDataFormat = "MyCustomDataFormat",

DocumentFormatProvider = new MyCustomFormatProvider()

});

However, I don't see a way to handle copying a custom format without intercepting the CopyExecutingCommand and adding the custom format the the clipboard. For example:

void RadRichTextBox_CommandExecuting(object sender, CommandExecutingEventArgs e)

{

if (e.Command is CopyCommand)

{

Clipboard.SetData("MyCustomDataFormat", GetSelectionAsCustomDataFormatString());

}

However, I would want to make sure that the default clipboard formats are still added to the clipboard in addition to our custom format.

Can you provide any guidance on the best way to handle copying and pasting a custom clipboard format?

Thank you.

RichTextBox