Can i set the TreeListViewItem visibility to visible or hide, when i use the treelistiview in Virtualization model.

I want to use this method to search something,or may be another?

Hi.

When clicked crop item and then directly press save button, cropped image is saved.It seems cropped result image save.

What i want  no cropping just save image. Please refer to the file for details.

How can i get uncropped image.

Please give me advise. 

Thanks reading this post.

Hi Telerik support team,

I have a TabbedWindow with RadTabItems generated dynamically from code behind. In each RadTabItem, there is frame that I navigated to a Page.

The trouble is that: When a user drags a tab out of a host TabbedWindow, if the drop is inside a RadTabItem (I meant users just drag out the header and drop inside a tab), the tab is not dragging out. In plus, since this moment, all drag-out is not working even drop area is outside a tab.

Many thanks for your support

Here is my code in C#:

And Xaml as below:

Hi,

I have a GridView with GridViewSelectColumn ,which have binded itemsource and seted selectionmode "Multiple".But the grid always have selected the fist value of itemsource and the selecteditem is same value.

 My expectation is nothing selected,how to solve it.

Regards,
Guo

Hello,

I'm trying to implement GIF for my GridView but it isn't animated. Does GridView support GIFs?

My example:

<Window
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:NotWorkingGif"
        xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation" x:Class="NotWorkingGif.MainWindow"
        mc:Ignorable="d"
        DataContext="{Binding RelativeSource={RelativeSource Self}}"
        Title="MainWindow" Height="450" Width="800">
    <Grid>
        <telerik:RadGridView ItemsSource="{Binding Collection}" AutoGenerateColumns="False">
            <telerik:RadGridView.Columns>
                <telerik:GridViewImageColumn DataMemberBinding="{Binding ImageUri}" Header="" ImageStretch="None" ImageHeight="16" ImageWidth="16" />
            </telerik:RadGridView.Columns>
        </telerik:RadGridView>
    </Grid>
</Window>

namespace NotWorkingGif
{
    using System;
    using System.Collections.ObjectModel;
    using System.ComponentModel;
    using System.Windows;

    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public ObservableCollection<TestClass> Collection { get; set; } = new ObservableCollection<TestClass>();

        public MainWindow()
        {
            InitializeComponent();

            this.Collection.Add(new TestClass() { ImageUri = new Uri(@"path to GIF image") });
        }
    }

    public class TestClass : INotifyPropertyChanged
    {
        private Uri imageUri;
        public Uri ImageUri
        {
            get => imageUri;

            set
            {
                imageUri = value;
                this.PropertyChanged?.Invoke(this, new PropertyChangedEventArgs("ImageUri"));
            }
        }

        public event PropertyChangedEventHandler PropertyChanged;
    }
}

Hello,

We are evaluating the PropertyGrid control and have a few questions.

1. When using Nested Properties, I am overriding ToString to display the child property values in the parent. However how do I get this string to update when the child properties are updated?

2. Is there a way to conditionally disable properties based on the values of other properties?

3. When using the Editor attribute with the EditorStyle.Modal option, is there a way to control the start position of the modal?

Thanks,
Hayley

When I create a PointSeries chart, the point's color is determined at moment the chart is showing. But I want the point's color changed with the datasource's some content after the chart was  shown.

So I make a new PlotInfo class shown as below, and  I set DefaultVisualMaterialSelector bind to PlotInfo's ColorFlag, with a Converter.
Finally, the project doesn't work, the point's color didn't change when I modify the ColorFlag.
So does ChartView3D support this kind of abbility? And how can I get what I want?

MainWindow.xaml

MainWindow.xaml.cs

Hi I am building a custom Filtering Control which allows users to resize the control. Interacting with the thumbs to resize is working but,I have noticed that when i click on the main  FilteringControl the whole Custom control will closes which means i can't filter my data :( .  How can i stop this from occurring? Thanks in advance.

<UserControl x:Class="MyControls.Views.ResizableFilteringControl.ResizableFilteringControl"
             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" 
             xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation"
             mc:Ignorable="d" 
             d:DesignHeight="500" d:DesignWidth="500" >
    <UserControl.Resources>

    </UserControl.Resources>

    <Grid>
        <StackPanel Margin="18" Background="White">
          
        <telerik:FilteringControl Name="FilteringControl"></telerik:FilteringControl>
            <Grid>
                <Thumb Name="SouthEastThumb"
                   HorizontalAlignment="Left" 
                   VerticalAlignment="Bottom" 
                   Width="16" Height="16" 
                   MouseEnter="OnMouseEnter"
                   DragStarted="OnDragStarted" 
                   DragDelta="OnDragDelta" 
                   DragCompleted="OnDragCompleted"/>
                <Thumb Name="SouthWestThumb"
                   HorizontalAlignment="Right" 
                   VerticalAlignment="Bottom" 
                   Width="16" Height="16" 
                   MouseEnter="OnMouseEnter"
                   DragStarted="OnDragStarted" 
                   DragDelta="OnDragDelta" 
                   DragCompleted="OnDragCompleted"/>
            </Grid>  
        
        
        </StackPanel>
    </Grid>
</UserControl>

Code behind:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Controls.Primitives;
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 DevExpress.Xpf.Core;
using DevExpress.Xpf.Core.Native;
using Telerik.Windows.Controls;
using Telerik.Windows.Controls.GridView;
using GridViewColumn = Telerik.Windows.Controls.GridViewColumn;


namespace MyControls.Views.ResizableFilteringControl
{
    /// <summary>
    /// Interaction logic for ResizableFilteringControl.xaml
    /// </summary>
    public partial class ResizableFilteringControl : IFilteringControl
    {
        //TODO fix issue with control not remiaing open when i click on the FilteringControl.
        //TODO add style to Thumbs.
        public ResizableFilteringControl()
        {
            InitializeComponent();
        }

        public void Prepare(GridViewColumn columnToPrepare)
        {
            this.FilteringControl?.Prepare(columnToPrepare);
         
        }

        public bool IsActive
        {
            get { return (bool)GetValue(IsActiveProperty); }
            set { SetValue(IsActiveProperty, value); }
        }

        /// <summary>
        /// Identifies the <see cref="IsActive"/> dependency property.
        /// </summary>
        public static readonly DependencyProperty IsActiveProperty =
            DependencyProperty.Register(
                "IsActive",
                typeof(bool),
                typeof(ResizableFilteringControl),
                new System.Windows.PropertyMetadata(false));

        private void OnDragStarted(object sender, DragStartedEventArgs e)

        {
            SetCursor(sender);
        }

        private void OnDragDelta(object sender, DragDeltaEventArgs e)

        {
            //TODO make resize to left.
            
            var yadjust = FilteringControl.RenderSize.Height + e.VerticalChange;
            var xadjust = this.FilteringControl.RenderSize.Width + e.HorizontalChange;

            if (IsResizeAllowed(xadjust, yadjust))

            {
                this.FilteringControl.Width = xadjust;
                this.FilteringControl.Height = yadjust;
            }
        }

        private static bool IsResizeAllowed(double xadjust, double yadjust)
        {
            //TODO let consumer specify these values so they are not hard coded.
            return (xadjust >= 50 && yadjust >= 50) &&
                   (xadjust <= 800 && yadjust <= 800);
        }

        private void OnDragCompleted(object sender, DragCompletedEventArgs e)
        {
            var t = (Thumb)sender;
            t.Cursor = null;
        }
        
        private void OnMouseEnter(object sender, MouseEventArgs e)
        {
            SetCursor(sender);
        }

        private static void SetCursor(object sender)
        {
            var thumb =  sender as Thumb;
            if (thumb != null)
            {
                if (thumb.Name == "SouthWestThumb")
                {
                    thumb.Cursor = Cursors.SizeNWSE;
                }
                else if (thumb.Name == "SouthEastThumb")
                {
                    thumb.Cursor = Cursors.SizeNESW;
                }
                else
                {
                    thumb.Cursor = null;
                }
            }         
        }
    }
}