How do I make a panel inside usercontrol scrollable at designtime

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Hello,

I place a panel inside a usercontrol, set its autoscroll to true and built the usercontrol.

When i place controls inside the panel at design time, it automatically shows the scrollbar if its content is larger, but i cannot scroll it, as the scrollbar doesn't respond to mouse events at design time except runtime

How can i fix this?

Thanks

What I have tried:

I created a designer and Override its GetHitTest function, but its not still working

Protected Overrides Function GetHitTest(ByVal point As System.Drawing.Point) As Boolean
         point = Control.PointToClient(point)
         Dim rect As Rectangle = Me.Host.Bounds
         Return rect.Contains(point)


     End Function

Posted 11-Mar-19 2:40am

Cool Smith

Updated 11-Mar-19 9:46am

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[no name] 11-Mar-19 10:48am

That's the "designer" and that's why it's called "design time"; it doesn't "run".

However, in the case of UWP, THAT designer can bind to a VALID data source / collection at design time and reflect it in a DataGrid, for example, while "designing"; but it still needs "data" (which you don't).

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Ralf Meier · Accepted Answer · 2019-03-11T09:46:00

Here is an example which shows how it must be done :
<

VB

Private HostControl As RMBaseSlider = Nothing

 Public Overrides Sub Initialize(ByVal component As System.ComponentModel.IComponent)
     MyBase.Initialize(component)

     HostControl = DirectCast(component, RMBaseSlider)
 End Sub


 Protected Overrides Function GetHitTest(point As System.Drawing.Point) As Boolean
     If HostControl IsNot Nothing Then
         Dim myPoint As Point
         If HostControl.ShowStepButtons Then
             myPoint = HostControl.ButtonLeft.PointToClient(point)
             If HostControl.ButtonLeft.ClientRectangle.Contains(myPoint) Then Return True
             myPoint = HostControl.ButtonRight.PointToClient(point)
             If HostControl.ButtonRight.ClientRectangle.Contains(myPoint) Then Return True
         End If
         myPoint = HostControl.Slider.PointToClient(point)
         If HostControl.Slider.ClientRectangle.Contains(myPoint) Then Return True
     End If

     Return MyBase.GetHitTest(point)
 End Function

This is a code-snippet out of one of my Control-Designers.
Here I have a Slider which contains 2 Buttons.
The GetHitTest delivers a TRUE to the Designer if the Mouse is located over one of these Buttons ...

I think that could help you ...