Completed
Last Updated: 28 May 2014 13:05 by Jesse Dyck
This allows a linked SplitPanels to be dynamically expanded and collapsed by clicking on the splitter button, and resized by dragging the splitter.
Approved
Last Updated: 15 Aug 2017 10:02 by Abed
ADMIN
Created by: Dimitar
Comments: 3
Category: SplitContainer
Type: Feature Request
6
Add right to left support.

This should be the same as in the standard split container – the panels should be swapped.
Completed
Last Updated: 28 May 2019 15:59 by ADMIN
Release R2 2019 SP1 (LIB 2019.2.603)
Use attached to reproduce. Move the splitter with the mouse and you will notice that is position is not correct when the mouse is released
Approved
Last Updated: 19 Mar 2019 12:55 by ADMIN
To reproduce:

Add a RadSplitContainer with several SplitPanels and use the following code:
  this.radSplitContainer1.EnableCollapsing = true;
  this.radSplitContainer1.UseSplitterButtons = true;

If you run the project, you will notice that the next/previous buttons are displayed for manipulating the SplitPanel's collapsed/expanded state. If you click one of the next/previous buttons, the relevant SplitPanel will be collapsed and the splitter will remain visible. Thus, the user has the possibility to return the previous state of the SplitPanel. However, if you try to collapse the SplitPanel programmatically by setting the Collapsed property to true, the corresponding splitter will disapper.
Completed
Last Updated: 02 May 2019 16:28 by ADMIN
Release R2 2019
When you try to move the splitter on 125% DPI and release the mouse, the splitter is placed to another place.
Completed
Last Updated: 27 Sep 2017 09:51 by ADMIN
Approved
Last Updated: 04 Dec 2017 12:56 by ADMIN
The Modifiers property should be visible in the properties window when a SplitPanel instance is selected. 

Workaround:

Manually change the modifier in the Designer.cs file to protected.
  
Completed
Last Updated: 28 Jun 2016 10:23 by ADMIN
When you cut-copy RadSplitContainer containing two SplitPanels from one form to another, only the RadSplitContainer is pasted, but the SplitPanels are missing.
Completed
Last Updated: 10 Jun 2014 10:55 by ADMIN
ADMIN
Created by: Stefan
Comments: 0
Category: SplitContainer
Type: Feature Request
3
Add functionality to collapse and expand the split panels in RadSplitContainer by buttons positioned in the splitter area just like ASP.NET. See example here: 
http://demos.telerik.com/aspnet-ajax/splitter/examples/collapseexpand/defaultcs.aspx
Completed
Last Updated: 12 Jun 2014 06:22 by ADMIN
SplitPanel - there is no property Name in Visual Studio designer.
Approved
Last Updated: 30 Mar 2016 13:12 by ADMIN
ADMIN
Created by: Julian Benkov
Comments: 0
Category: SplitContainer
Type: Bug Report
2
If the AutoScroll of RadSplitContainer is true and I scroll the container a little, don’t work the resizes of the panels.

sample code:

public Form1()
    {
        InitializeComponent();
 
        RadSplitContainer radSplitContainer1 = new RadSplitContainer()
        {
            Dock = DockStyle.Fill,
            AutoScroll = true
        };
 
        this.Controls.Add(radSplitContainer1);
 
        for (int i = 0; i < 10; i++)
        {
            var panel = new SplitPanel();
            panel.SizeInfo.SizeMode = SplitPanelSizeMode.Absolute;
            panel.SizeInfo.AbsoluteSize = new Size(100, 0);
            radSplitContainer1.SplitPanels.Add(panel);
        }
    }
Approved
Last Updated: 20 Nov 2017 12:51 by ADMIN
The scenario that we want to cover is to disable resizing the split panels but still enable the option for expanding/collapsing them via the buttons.
Approved
Last Updated: 16 May 2019 05:07 by ADMIN
To reproduce:
- Use relative sizing and save the RelativeRatio.
- Set the same value after restarting the application.
- The panel size is not the same. 

Workaround:
Use absolute size. 
Completed
Last Updated: 31 Mar 2015 07:42 by ADMIN
Sometimes there are 3 or more dots on a splitter, but when changing the orientation then there is only one dot.
sometimes there are lines, but when switching to disabled these lines are much bigger. But only in one orientation.
Completed
Last Updated: 27 Oct 2017 10:02 by ADMIN
How to reproduce:  check the attached video

Workaround: Only split panels can be added to RadSplitContainer,  so add a panel first to the control before using the document outline
Completed
Last Updated: 19 Nov 2018 10:26 by ADMIN
ADMIN
Created by: Hristo
Comments: 1
Category: SplitContainer
Type: Feature Request
1
The end user should be able to specify what Cursor to be used while resizing a panel.

Currently this can be achieved using the custom control below:
public class MyRadSplitContainer : RadSplitContainer
{
    private bool isResizing;
 
    public override string ThemeClassName
    {
        get
        {
            return typeof(RadSplitContainer).FullName;
        }
    }
 
    protected override void OnMouseDown(MouseEventArgs e)
    {
        if (e.Button == MouseButtons.Left && this.ContentRectangle.Contains(e.Location))
        {
            SplitterElement splitter = GetSplitterElementAtPoint(e.Location);
            if (splitter != null && !splitter.Fixed)
            {
                this.isResizing = true;
            }
 
            base.OnMouseDown(e);
        }
    }
 
    protected override void OnMouseUp(MouseEventArgs e)
    {
        base.OnMouseUp(e);
 
        this.isResizing = false;
    }
 
    public override Cursor Cursor
    {
        get
        {
            Cursor cursor = base.Cursor;
            if (this.isResizing && cursor == Cursors.SizeWE)
            {
                cursor = Cursors.VSplit;
            }
            else if (this.isResizing && cursor == Cursors.SizeNS)
            {
                cursor = Cursors.HSplit;
            }
 
            return cursor;
        }
        set
        {
            if (value == Cursors.VSplit)
            {
                value = Cursors.SizeWE;
            }
            else if (value == Cursors.HSplit)
            {
                value = Cursors.SizeNS;
            }
 
            base.Cursor = value;
        }
    }
}
Approved
Last Updated: 19 Jun 2017 11:00 by ADMIN
To reproduce: add a RadSplitContainer with 3 identical SplitPanels. The left panel needs to be initially collapsed. That is why we use the introduced public API (MoveSplitter method). When the form is shown and you try to expand the left (yellow) panel, you will notice that the splitter is not restored to the correct position. Please refer to the attached gif file.

This must be handled for Vertical and Horizontal orientation!!!

Workaround:

Private Sub RadForm1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
    AddHandler Me.RadSplitContainer1.MouseDown, AddressOf SplitContainerMouseDown
End Sub
Private Sub SplitContainerMouseDown(sender As Object, e As MouseEventArgs)
    Dim clickedElement = Me.RadSplitContainer1.ElementTree.GetElementAtPoint(e.Location)
    If TypeOf clickedElement Is SplitterElement Or TypeOf (clickedElement.Parent) Is SplitterElementLayout Then
        RadSplitContainer1.RestoreSplitterPosition(Me.RadSplitContainer1.Splitters(0))
        RemoveHandler Me.RadSplitContainer1.MouseDown, AddressOf SplitContainerMouseDown
    End If
End Sub
Completed
Last Updated: 01 Nov 2017 13:06 by ADMIN
Please refer to the attached sample project. Double click the middle splitter in the horizontal split container.

Workaround: manually collapse the desired split panel:

private void Form1_Load(object sender, EventArgs e)
{
    this.radSplitContainer3.PanelCollapsing += radSplitContainer3_PanelCollapsing;
    foreach (SplitterElement s in this.radSplitContainer3.Splitters)
    {
        s.DoubleClick += s_DoubleClick;
    }
}

private void s_DoubleClick(object sender, EventArgs e)
{
    SplitterElement s = sender as SplitterElement;
    ((SplitPanel)s.RightNode).Collapsed = true;
}
1 2