Questions on UI for WPF Forum

1 answer

123 views

Hi!,

How do I show the value of a bar when I'm hovering over the bar's legend? Just as the value is displayed when you hover over the bar itself.

I'm am using this to highlight the bar I'm hovering on:

productionSeriesMapping.SeriesDefinition.InteractivitySettings.HoverScope = InteractivityScope.Series

Thanks, Jose

Chart

answered on 07 Oct 2011

1 answer

130 views

Can't make Drag and drop example work

Hi, I've tried to reproduce the "Getting Started" example of DragAndDrop but I can't make it work (drag event not fired).

Here my XAML code:

<UserControl xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation" x:Class="WpfApplication5.GettingStarted"

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

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

xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"

xmlns:d="http://schemas.microsoft.com/expression/blend/2008"

mc:Ignorable="d"

d:DesignHeight="300" d:DesignWidth="300">

<UserControl.Resources>

<DataTemplate x:Key="ApplicationDragTemplate">

<Image Source="{Binding IconPath}"

Stretch="None"

VerticalAlignment="Top" />

</DataTemplate>

<Style TargetType="ListBoxItem"

x:Key="draggableItemStyle">

<Setter Property="HorizontalContentAlignment"

Value="Stretch" />

<Setter Property="telerik:RadDragAndDropManager.AllowDrag"

Value="True" />

</Style>

</UserControl.Resources>

<Grid x:Name="LayoutRoot"

Background="White">

<Grid.ColumnDefinitions>

<ColumnDefinition Width="200" />

<ColumnDefinition Width="150" />

<ColumnDefinition Width="200" />

</Grid.ColumnDefinitions>

<ListBox x:Name="allApplicationsBox"

telerik:RadDragAndDropManager.AllowDrop="True"

ItemContainerStyle="{StaticResource draggableItemStyle}">

<ListBox.ItemTemplate>

<DataTemplate>

<Grid Width="150">

<Grid.RowDefinitions>

<RowDefinition />

</Grid.RowDefinitions>

<Image Grid.Row="0"

HorizontalAlignment="Center"

Source="{Binding IconPath}"

Width="32"

Height="32"

Margin="0 0 5 0" />

<TextBlock Grid.Row="1"

Text="{Binding Name}"

FontWeight="Bold"

HorizontalAlignment="Center" />

<TextBlock Text="{Binding Author}"

Grid.Row="2"

HorizontalAlignment="Center" />

</Grid>

</DataTemplate>

</ListBox.ItemTemplate>

</ListBox>

<ListBox x:Name="myApplicationsBox"

telerik:RadDragAndDropManager.AllowDrop="True"

ItemContainerStyle="{StaticResource draggableItemStyle}"

Grid.Column="2">

<ListBox.ItemTemplate>

<DataTemplate>

<StackPanel VerticalAlignment="Stretch"

HorizontalAlignment="Stretch">

<Image Source="{Binding IconPath}"

Margin="0 0 3 0"

HorizontalAlignment="Center" />

<TextBlock Text="{Binding Name}"

HorizontalAlignment="Center" />

</StackPanel>

</DataTemplate>

</ListBox.ItemTemplate>

<ListBox.ItemsPanel>

<ItemsPanelTemplate>

<telerik:RadUniformGrid Columns="3"

HorizontalAlignment="Left"

VerticalAlignment="Top" />

</ItemsPanelTemplate>

</ListBox.ItemsPanel>

</ListBox>

</Grid>

</UserControl>

And here my C# code:

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.Collections.ObjectModel;

using Telerik.Windows.Controls.DragDrop;

using Telerik.Windows.Controls;

namespace WpfApplication5

{

public class ApplicationInfo

{

public ApplicationInfo(string iconPath, string name, string author)

{

this.IconPath = iconPath;

this.Name = name;

this.Author = author;

}

public String IconPath

{

get;

set;

}

public String Name

{

get;

set;

}

public String Author

{

get;

set;

}

public partial class GettingStarted : UserControl

{

public static ObservableCollection<ApplicationInfo> GenerateApplicationInfos()

{

ObservableCollection<ApplicationInfo> data = new ObservableCollection<ApplicationInfo>();

for (int i = 1; i <= 5; i++)

{

data.Add(new ApplicationInfo("Images/nature" + i + ".jpg", "Nome" + i, "Autore" + 1));

}

return data;

}

private ObservableCollection<ApplicationInfo> allApplications = GenerateApplicationInfos();

private ObservableCollection<ApplicationInfo> myApplications = new ObservableCollection<ApplicationInfo>();

public GettingStarted()

{

InitializeComponent();

allApplicationsBox.ItemsSource = allApplications;

myApplicationsBox.ItemsSource = myApplications;

RadDragAndDropManager.AddDragQueryHandler(this, OnDragQuery);

RadDragAndDropManager.AddDragInfoHandler(this, OnDragInfo);

RadDragAndDropManager.AddDropQueryHandler(this, OnDropQuery);

RadDragAndDropManager.AddDropInfoHandler(this, OnDropInfo);

}

// OnDragQuery event handler

private void OnDragQuery(object sender, DragDropQueryEventArgs e)

{

ListBoxItem listBoxItem = e.Options.Source as ListBoxItem;

ListBox box = ItemsControl.ItemsControlFromItemContainer(listBoxItem) as ListBox;

if (e.Options.Status == DragStatus.DragQuery && box != null)

{

e.Options.Payload = box.SelectedItem;

ContentControl cue = new ContentControl();

cue.ContentTemplate = this.Resources["ApplicationDragTemplate"] as DataTemplate;

cue.Content = box.SelectedItem;

e.Options.DragCue = cue;

e.Options.ArrowCue = RadDragAndDropManager.GenerateArrowCue();

}

e.QueryResult = true;

}

// OnDropQuery event handler

private void OnDropQuery(object sender, DragDropQueryEventArgs e)

{

ItemsControl box = e.Options.Destination as ItemsControl;

IList<ApplicationInfo> itemsSource = box.ItemsSource as IList<ApplicationInfo>;

ApplicationInfo payload = e.Options.Payload as ApplicationInfo;

e.QueryResult = payload != null && !itemsSource.Contains(payload);

}

// OnDropInfo event handler

private void OnDropInfo(object sender, DragDropEventArgs e)

{

ItemsControl box = e.Options.Destination as ItemsControl;

IList<ApplicationInfo> itemsSource = box.ItemsSource as IList<ApplicationInfo>;

ApplicationInfo payload = e.Options.Payload as ApplicationInfo;

if (e.Options.Status == DragStatus.DropComplete)

if (!itemsSource.Contains(payload))

itemsSource.Add(payload);

}

// OnDragInfo event handler

private void OnDragInfo(object sender, DragDropEventArgs e)

{

ListBoxItem listBoxItem = e.Options.Source as ListBoxItem;

ListBox box = ItemsControl.ItemsControlFromItemContainer(listBoxItem) as ListBox;

IList<ApplicationInfo> itemsSource = box.ItemsSource as IList<ApplicationInfo>;

ApplicationInfo payload = e.Options.Payload as ApplicationInfo;

if (e.Options.Status == DragStatus.DragComplete)

{

if (payload != null && itemsSource.Contains(payload))

{

itemsSource.Remove(payload);

}

Can anyone help me?

Thank You
Sergio

DragAndDrop

answered on 07 Oct 2011

0 answers

200 views

RadGridView a unique HierarchyItem expanded

Hi,

I am using this solution : http://www.telerik.com/community/forums/wpf/gridview/binding-to-the-isexpandable-proeprty.aspx
An i want to show a unique HierarchyItem expanded.

And when I use this code, the IsExpanded property is reseted :

private void MyGrid_RowIsExpandedChanged(object sender, RowEventArgs e)

{

if (changing)

return;

this.changing = true;

if ((e.Row as GridViewRow).IsExpanded)

{

this.MyGrid.CollapseAllHierarchyItems();

this.MyGrid.ExpandHierarchyItem(e.Row.DataContext);

}

this.changing = false;

}

private void AttributesGrid_MouseDoubleClick(object sender, System.Windows.Input.MouseButtonEventArgs e)

{

ExpandHierarchyItem((RadGridView)sender);

}

private void ExpandHierarchyItem(RadGridView sender)

{

sender.CollapseAllHierarchyItems();

sender.ExpandHierarchyItem(sender.SelectedItem);

}

private void MyGrid_BeginningEdit(object sender, GridViewBeginningEditRoutedEventArgs e)

{

ExpandHierarchyItem((RadGridView)sender);

}

Do you have a way for to resolve this problem

Thanks
Regards

GridView

asked on 07 Oct 2011

1 answer

171 views

Normal range does not appear

Currently using RadControls for WPF Q2 2011. It seems that the sparkline normal r4ange is not rendered when the NormalRangeTop and NormalRangeBottom are BOTH set to values that lie outside the range of data points.

So, for example, if my data points range from 20 to 40, then

When Top and Bottom are:
39 and 0, normal range appears
41 and 0, does not appear
70 and 20, normal range appears
70 and 10, doea not appear

Is this by design? Or is this a bug? Or am I missing a property setting? If by design, plase explain.
Thanks
Dan

Sparkline

answered on 07 Oct 2011

2 answers

277 views

Selection of cells disappears after sorting and filtering

Hi,

I have a gridview and the gridview has as SelectionMode="Multiple" and SelectionUnit="Cell".
My problem is now that the selection of the cells disappears after sorting or filtering the grid. But I want that the selected cells stay selected also after sorting the grid.
If I use SelectionUnit="FullRow", then the selection of the rows don't disappear.

Why does the gridview act like this? Do I have to set some properties or do You know an easy way to implement this functionality on my own?

Thanks
Walter

GridView

answered on 07 Oct 2011

3 answers

80 views

AppointmentItem: Start Visibility Indicator issue

I want to set the Start visibility Indicator for the appointment as visible when the current date of the timelinecontrol is greater than the start date of the appointment. Which means the start date of the appointment is not in the visible region of the timeline control, i want to see the indicators. Is it possible to achieve this?

The indicators work as I desire when there are no resources. I mean the status indicators are visible. Refer to the screenshot.Here there are no resources and we can see the indicators.

In the following screenshot we have resources but no continuation indicators

ScheduleView

answered on 07 Oct 2011

1 answer

215 views

Deselect the selected cells

Hi,

I am using Self Referencing GridView. In that in have a problem that if I am selecting new cells (in parent and also in child) by holding the control key. Now if I click particular cell without holding the control key, then all the selected cells should be deselected. But its happening only the corresponding child/parent grid.

Also by holding the mouse left button how to select the parent and child grid columns without holding control keys.

Thanks,
Ramasamy

GridView

answered on 07 Oct 2011

5 answers

329 views

Grid performance for around 2000 records

Hi all,

I am facing some performance issues and am a bit puzzled. I am sure I am missing something and would appreciate any suggestions.
I am using telerik WPF dlls with version 2009.2.0813.35.

The scenario is I am loading around 2000 objects. It takes almost 30 seconds to render. I assume by default it is using the virtualizing panel and looking at the profiler that seems to be the case.

I am pasting the profiler output here. The problem seems to be the UpdateRowHeight call in the GridViewVirtualizingPanel where it seems to go through all the records even though the UI is virtualized.

61.08 % MeasureOverride - 18728 ms - 0 calls - Telerik.Windows.Controls.GridView.BaseVirtualizingPanel.MeasureOverride(Size)
61.08 % UpdateRowHeight - 18728 ms - 0 calls - Telerik.Windows.Controls.GridView.GridViewVirtualizingPanel.UpdateRowHeight(IRowItem)
    61.08 % OnRefreshScrollExtent - 18728 ms - 0 calls - Telerik.Windows.Controls.GridView.GridViewVirtualizingPanel.OnRefreshScrollExtent()
      61.08 % RefreshItemsPhysicalHeightsCache - 18728 ms - 0 calls - Telerik.Windows.Controls.GridView.GridView.Scrolling.PhysicalHeightsCache.RefreshItemsPhysicalHeightsCache()
        61.08 % CreateDataRecordsHeightsCache - 18728 ms - 0 calls - Telerik.Windows.Controls.GridView.GridView.Scrolling.PhysicalHeightsCache.CreateDataRecordsHeightsCache(IList<Record>, Double, Int32, Int32)
          61.08 % InsertItem - 18728 ms - 0 calls - Telerik.Windows.Controls.GridView.GridView.Scrolling.RadKeyedCollection<TKey, TItem>.InsertItem(Int32, TItem)
            61.08 % AddKey - 18728 ms - 0 calls - Telerik.Windows.Controls.GridView.GridView.Scrolling.RadKeyedCollection<TKey, TItem>.AddKey(TKey, Int32)
              30.93 % System.Collections.Generic.Dictionary<TKey, TValue>.FindEntry... - 9484 ms - 0 calls
              30.15 % System.Collections.Generic.Dictionary<TKey, TValue>.Insert... - 9245 ms - 0 calls

-------------------------------------------------------------------------------------------------------------------------------

Is this a known thing or am I doing something wrong? The xaml fragment is below:

<telerik:RadGridView Name="OfficerGrid" AutoGenerateColumns="False" IsReadOnly="True"
                                 MultipleSelect="False" ShowGroupPanel="False"
                                 IsFilteringAllowed="False"
                                 SelectionChanged="OnSelectionChanged" DataLoadMode="Asynchronous"
                                 GridLinesVisibility="None"
                                 MouseDoubleClick="OfficerGrid_MouseDoubleClick">
                <telerik:RadGridView.Columns>
                    <telerik:GridViewDataColumn Header="Name" DataMemberBinding="{Binding Path=Name, Mode=OneWay}"/>
                    <telerik:GridViewDataColumn Header="Office" DataMemberBinding="{Binding Path=Office, Mode=OneWay}"/>
                    <telerik:GridViewDataColumn Header="Job Title" DataMemberBinding="{Binding Path=JobTitle, Mode=OneWay}"/>
                </telerik:RadGridView.Columns>
            </telerik:RadGridView>

Thanks for any help,
Kashi

GridView

answered on 07 Oct 2011

1 answer

110 views

Heirarchical GridView does not show new row when datatable updated

I have a GridView's itemsource bound to a dataset with a table "xyz" as it's DataMember. When I add a new row to a .net listview bound to the same table, the GridView does not display the new row. However, when I click on the filter icon on the first column of the GridView, I can see the new row value. Any ideas?
Rod

GridView

answered on 07 Oct 2011

3 answers

128 views

Gridview cells not updating when cells are scrolled out of view

I am supporting some Telerik code that has a GridView with 30 columns of GridViewDataColumn type. As part of the GridView, there is a RadGridView.RowDetailsTemplate that includes a UserControl that is basically an editor of the columns of the GridView.

Bindings seems to be refreshing the GridView columns just fine when the columns of the GridView are visible to the user. Since this GridView has about 30 columns, only about 10 columns are visible to the user at any given time. As user scrolls horizontally, he can see the other columns. If the columns being edited by the user are not visible at the time of editing, those values are not updated 50% of the time when he scrolls the grid columns into view. Some columns are being updated correctly and some columns would not be updated correctly. If the columns are visible at the time of editing, we have not noticed the cells not be updated correctly.

To test out our viewmodel, I rewrote part of the grid using the same bindings with a non-Telerik grid, everything seems to refresh just fine as the values are being edited and the gridview being scrolled.

We are using the current Telerik control for WPF 4.

Any suggestions would be appreciated.

Thanks,
Milt

GridView

answered on 06 Oct 2011