Questions on UI for WPF Forum

3 answers

68 views

NullpointerException on AppointmentItem.EnsureSelection

Hi,

I've got a nullpointer exception in AppointmentItem.EnsureSelection method. The occurrenceInfo is null.

void EnsureSelected()
{
    if (!this.IsSelected)
    {
        this.ScheduleView.UpdateSelectionOnMouseButton(this.occurrenceInfo.Occurrence, this.ActualRange, false, true, true, false);
    }
}

In the mouse handlers the occurrenceInfo is checked against being null:

private void AppointmentItemMouseRightButtonDown(object sender, MouseButtonEventArgs e)
   {
       if (this.ScheduleView != null && this.occurrenceInfo != null)
       {
           this.ScheduleView.UpdateSelectionOnMouseButton(this.occurrenceInfo.Occurrence, this.ActualRange, false, false);
           e.Handled = true;
       }
   }

   private void AppointmentItemMouseRightButtonUp(object sender, MouseButtonEventArgs e)
   {
       if (this.ScheduleView != null && this.occurrenceInfo != null)
       {
           this.ScheduleView.UpdateSelectionOnMouseButton(this.occurrenceInfo.Occurrence, this.ActualRange, false, true);
           e.Handled = false;
       }
   }

Could you fix this?
Thx,
Nico

ScheduleView

answered on 20 Sep 2011

1 answer

89 views

Event removed

Hi,

I have just upgraded my Telerik from V2010.3.1314.35 to V2011.2.712.35 and I realized that the "DisplayDateChanged" event was remove and I found nothing about this change.

Can someone give me informations about this fix: Why this change was made, In which version this fix took place, etc...???

Thank's

DatePicker

answered on 20 Sep 2011

1 answer

119 views

"local" drag and drop

Hi,

I've attached an image which hopefully helps me to better describe my issue:
image

I need to enable drag and drop only for and within a single tree item.
So each content element within a tree item should only be drag-&dropable within the same item.
The tree items itself ( cars, trucks, etc.) shoudn't be draggable at all.

I'm having trouble to prevent a content drag&drop operation from one tree item to another one ( e.g (2) => (3)).

I would be glad for some help.

Thanks in advance

Thorsten

PanelBar

answered on 20 Sep 2011

1 answer

466 views

Binding property to TreeListView Row Background color

I am trying to bind the background of the row to a variable in the datasource. I cannot seem to get it to work.

I am including the Xaml and Xaml.cs code to see if you can see what I am missing.



Reason for trying to bind to a variable is because I have a validate button in my program. It will return the ID of the invalid row

that will be highlighted in the treelistview... (the RowBGColor would be set to yellow ).






using System.Collections.ObjectModel;
using System.Windows;
using System.Drawing;
 
namespace TelerikRowBackground
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        private int rowIndex = 1;
        public MainWindow()
        {
            InitializeComponent();
        }
 
        private void Button_Click(object sender, RoutedEventArgs e)
        {
            MessageBox.Show("Highlight Row: " + rowIndex);
             
            //TODO: Change row background for rowIndex to Yellow.
            // And reset previous hightlighted row.
 
 
            if(rowIndex == 3)
            {
                rowIndex = 1;
            }
            else
            {
                rowIndex++;
            }
        }
    }
 
    public class ViewModel
    {
        public ObservableCollection<Model> AllData
        {
            get
            {
                return new ObservableCollection<Model>()
                           {
                               new Model()
                                   {
                                       ID = 1,
                                       RowBGColor = Color.Red,
                                       Property1 = "Test1.1",
                                       Property2 = "Test2.1",
                                       Property3 = "Test3.1",
                                       Children = new ObservableCollection<Model>()
                                                      {
                                                          new Model()
                                                              {
                                                                  ID = 2,
                                                                  RowBGColor = Color.Yellow,
                                                                  Property1 = "Test1.2",
                                                                  Property2 = "Test2.2",
                                                                  Property3 = "Test3.2",
                                                                  Children = new ObservableCollection<Model>()
                                                                                 {
                                                                                     new Model()
                                                                                         {
                                                                                             ID = 3,
                                                                                             RowBGColor = Color.Green,
                                                                                             Property1 = "Test1.3",
                                                                                             Property2 = "Test2.3",
                                                                                             Property3 = "Test3.3"
                                                                                         }
                                                                                 }
                                                              }
                                                      }
                                   }
                           };
            }
        }
    }
 
    public class Model
    {
        public int ID { get; set; }
        public string Property1 { get; set; }
        public string Property2 { get; set; }
        public string Property3 { get; set; }
        public Color RowBGColor { get; set; }
        private ObservableCollection<Model> _children;
        public ObservableCollection<Model> Children
        {
            get { return _children ?? (_children = new ObservableCollection<Model>()); }
            set { _children = value; }
        }
    }
}







<Window x:Class=

"TelerikRowBackground.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:TelerikRowBackground" Title="MainWindow" Height="350" Width="525">

<Window.Resources>

<local:ViewModel x:Key="MyViewModel"/>

</Window.Resources>

<DockPanel DataContext="{StaticResource MyViewModel}">

<telerik:RadTreeListView Name="radTreeListView1"

DockPanel.Dock="Top"

Margin="5,5,0,0"

AutoGenerateColumns="False"

ItemsSource="{Binding AllData}"

VerticalAlignment="Top"

HorizontalAlignment="Left"

IsFilteringAllowed="False"

telerik:StyleManager.Theme="Windows7"

EnableColumnVirtualization="True"

EnableRowVirtualization="True"

AutoExpandGroups="True" >

<telerik:RadTreeListView.ItemContainerStyle>

<Style TargetType="telerik:GridViewRowItem">

<Setter Property="Foreground" Value="{Binding RowBGColor}" />

</Style>

</telerik:RadTreeListView.ItemContainerStyle>

<telerik:RadTreeListView.ChildTableDefinitions>

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

</telerik:RadTreeListView.ChildTableDefinitions>

<telerik:RadTreeListView.Columns>

<telerik:GridViewDataColumn x:Name="idColumn" DataMemberBinding="{Binding ID, Mode=TwoWay }" Header="ID" />

<telerik:GridViewDataColumn x:Name="prop1Column" DataMemberBinding="{Binding Property1, Mode=TwoWay }" Header="Property 1" />

<telerik:GridViewDataColumn x:Name="prop2Column" DataMemberBinding="{Binding Property2, Mode=TwoWay }" Header="Property 2" />

<telerik:GridViewDataColumn x:Name="prop3Column" DataMemberBinding="{Binding Property3, Mode=TwoWay }" Header="Property 3" />

</telerik:RadTreeListView.Columns>

</telerik:RadTreeListView>

<Button DockPanel.Dock="Bottom" Height="50" Click="Button_Click" >Click to Highlight Row</Button>

</DockPanel>

</Window>

TreeListView

answered on 20 Sep 2011

3 answers

308 views

How to do action after drag/drop operation

I have two instances where I drag appointment onto the ScheduleView. Once dragging from a listview to the scheduleview, and once when you drag within the scheduleview. In both cases I would like to complete some kind of action after the drop is completed. I have added the appropriate drop info handler but it never gets hit. I do have a custom drag behavior that handles the drop action itself. What do I have to do to make something happen after the drop is completed. OnDropInfo never fires...

//Drag and Drop handlers to the result listview and ScheduleView

RadDragAndDropManager.AddDragQueryHandler(resultListView, OnDragQuery);

RadDragAndDropManager.SetAllowDrop(taskBoardScheduleView, true);

RadDragAndDropManager.AddDropInfoHandler(taskBoardScheduleView, OnDropInfo);

taskBoardScheduleView.DragDropBehavior = new TaskBoardDragDropBehavior();

protected virtual void OnDropInfo(object sender, DragDropEventArgs e)

{

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

{

RefreshScheduleView();

//DateSpan dateSpan = new DateSpan(taskBoardScheduleView.VisibleRange.Start, taskBoardScheduleView.VisibleRange.End);

//viewModel.GetTaskAppointments(dateSpan);

}

ScheduleView

answered on 20 Sep 2011

1 answer

63 views

Calendar

Buen dia, quiciera saber como invocar o llamar a un evento cuando se da click sobre el boton que cambia la vista del mes?

muchas gracias, si exitste dicho evento?

Calendar

answered on 20 Sep 2011

5 answers

164 views

Carousel customization

Hey,

I need to customize how theCarousel animate its' items and how it's placing them.
The default behavior looks like this (Bold is the selected item, usually it looks different):

item1, item2, item3, item4, item5.

when you scroll left it looks like this:

item0, item1, item2, item3, item4,

I need the carousel to behave like this:

item1, item2, item3, item4, item5.

when you scroll left it looks like this:

item1, item2, item3, item4

I hope it is clearn enough.

Ariel

Carousel

answered on 20 Sep 2011

1 answer

51 views

How function IndexOf works in DataItemCollecion

Is function IndexOf in DataItemCollecion using Equals method on objects?

GridView

answered on 20 Sep 2011

0 answers

103 views

Need checkbox in treeview

I want to put check box before "+" (expande and collapse icon) .
Actually I want a single check box for all child item under "+".
How can I do it ?

TreeListView

asked on 20 Sep 2011

1 answer

126 views

External RowDetails

Hello all.

I'm trying to display rowdetails in a nice tabcontrol.
I can display the rowdetails without any flaw using this method, but only if my grid is not wrapped in a tabcontrol:

XAML

<telerik:RadGridView.RowDetailsTemplate>

<DataTemplate x:Name="TrackGrid">

<telerik:RadGridView Name="innerGrid"></telerik:RadGridView>

</DataTemplate>

</telerik:RadGridView.RowDetailsTemplate>

Code

Dim club As New .Album

club = TryCast(RadGridView1.SelectedItem, Album)

Dim innerDataGrid As RadGridView = TryCast(e.DetailsElement, RadGridView)

innerDataGrid.ItemsSource = Track.GetAll(club.AlbumID)

As i work in VB, and i'm just switching to WPF, i can't seem to find some decent exaples how to do this action while using a tabcontrol in my rowdetails. So what i need is to wrap my grid in a radtabcontrol, and then get the same output, in a tab, like this

<telerik:RadGridView.RowDetailsTemplate>

<DataTemplate x:Name="TrackGrid">

<telerik:RadTabControl>

<telerik:RadTabItem>

<telerik:RadGridView Name="innerGrid"></telerik:RadGridView>

</telerik:RadTabItem>

</telerik:RadTabControl>

</DataTemplate>

</telerik:RadGridView.RowDetailsTemplate>

I'm looking towards your answer to this.

Greetings

GridView