iOS Question Positioning a panel in the centre of the screen

Sanxion · May 3, 2016

Hi all

I am using the following to centre my panels (I have lots of them):

B4X:

Sub PositionThePanels

    For Each v As View In Page1.RootPanel
        If v Is Panel Then 

            Dim PanelTag As String
            PanelTag = v.Tag

            If PanelTag.StartsWith("Lesson") Then
                  v.Left = (Page1.RootPanel.Width - v.Width) / 2
                  v.Top = (Page1.RootPanel.Height - v.Height) / 2
            End If
        End If

    Next
  
End Sub

The code does centre the panels...however, once the Sub has finished executing, the panels move back to the position they are in the designer.

Does anybody know why?

Thanks

Yvon Steinthal · May 3, 2016

I have no idea why it happens, but i would create the panel programmatically if the designer is a problem...

Erel · May 3, 2016

Call this code from Page_Resize event.

Another option is to set it in the designer script:

B4X:

Panel1.HorizontalCenter = 50%x
Panel1.VerticalCenter = 50%y

tufanv · May 3, 2016

Erel said:
Call this code from Page_Resize event.

Another option is to set it in the designer script:

B4X:

Panel1.HorizontalCenter = 50%x Panel1.VerticalCenter = 50%y

I sometimes use outside the resize but use a value within the resize event. Is it ok ?
What i mean is for example under resize i use:
widthreal = 100%x
heightreal=100%y

than use widthreal*0.5 for 50%x for example

Sanxion · May 3, 2016

Erel said:
Call this code from Page_Resize event.

Another option is to set it in the designer script:

B4X:

Panel1.HorizontalCenter = 50%x Panel1.VerticalCenter = 50%y

Yes I did that earlier and it worked.

Does that mean whenever I am setting the size of views, the code that does it should be called from Page_Resize?

Erel · May 3, 2016

Sanxion said:
Does that mean whenever I am setting the size of views, the code that does it should be called from Page_Resize?

More or less correct. See this tutorial: https://www.b4x.com/android/forum/threads/layouts-pages-and-viewcontrollers.45942/#content

Sanxion · May 3, 2016

Erel said:
More or less correct. See this tutorial: https://www.b4x.com/android/forum/threads/layouts-pages-and-viewcontrollers.45942/#content

Thank-you.

iOS Question Positioning a panel in the centre of the screen

Sanxion

Active Member

Yvon Steinthal

Active Member

Erel

B4X founder

tufanv

Expert

Sanxion

Active Member

Erel

B4X founder

Sanxion

Active Member

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