B4J Question [Solved] Move a form on screen, better way ?

[Laurent95]

Hello,

I need a bit help, if someone have a better way to move the form and can share it that would be nice.

The goal is to have under B4J a form like a Widget on B4A, this is solved in the example project attached.
But to move the form smoothly i need, if it's posible, to have another way, why ? :
- In the example with the right click it move but it's saccaded
- With the middle button it's best but it's very long, i increment movement by 1 pixel each time.

So if someone have another idea, that's welcome, thank you.
And i'm quite sure that my test code is maybe not the best way.
Sorry if there is a response to this problem, searched a lot but i didn't found any response.

Thank you, best regards.

Edit deleted the zip file: see last reply, the most smoothly code given by Stevel05 is updated in this version

 

[Erel]

Check this code: https://www.b4x.com/android/forum/threads/how-to-move-an-undecorated-form.37551/post-221684

You can do something similar. It will work better.

 

[Laurent95]

Check this code: https://www.b4x.com/android/forum/threads/how-to-move-an-undecorated-form.37551/post-221684

You can do something similar. It will work better.

Hi,
Thank you i'll test it.

EDIT:
@Erel
Perfect, move smoothly
But totally unable to limit the form to go off the screen. Tests are too bigs, it make motion run slower
Anyway, it's better than my solutions, thank you. And the user himself would be responsible for moving the form to the correct position .

If someone is interested.
Version 2 attached: right click with Erel's code, middle click to compare with my less smoothy code, too slow.

Nice evening all


Edit deleted the zip file: see last reply, the most smoothly code given by Stevel05 is updated in this version.

 

[Erel]

But totally unable to limit the form to go off the screen. Tests are too bigs, it make motion run slower

Impossible. Test it in release mode.

 

[Laurent95]

Impossible. Test it in release mode.

Hello,

Indeed it's better in release mode, anyway the form move smoothly and it's what i want.
Just still have some time the form who stop before the limits of the screen. But i can't find another way than in the project attached.
I put a Sleep(0) but not sure that change something, maybe it's my old Laptop who's slow also.

At least it's smooth and works ok most of time, thank you for the help.
Nice afternoon to all


Edit deleted the zip file: see last reply, the most smoothly code given by Stevel05 is updated in this version.

 

[stevel05]

It works s expected here. The way it is written, if any of the tests fail then the form will stop. So if you are trying to get the form into the top left corner and the x value is 0 it won't let you drag it up any further .

 

[stevel05]

Try this instead:

Private Sub imgIcon_MouseDragged (EventData As MouseEvent)
    If (rightBtnPressed) Then
        Dim jo As JavaObject = EventData
        MoveX = jo.RunMethod("getScreenX", Null) - oldX
        MoveY = jo.RunMethod("getScreenY", Null) - oldY
        MainForm.WindowLeft = Max(0,Min(fx.PrimaryScreen.MaxX - MainForm.WindowWidth,jo.RunMethod("getScreenX", Null) - oldX))
        MainForm.WindowTop = Max(0,Min(fx.PrimaryScreen.MaxY - MainForm.Windowheight,jo.RunMethod("getScreenY", Null) - oldY))
'        If ((MoveX>0) And (MoveY>0) And _
'            ((MoveX+MainForm.Width)<fx.PrimaryScreen.MaxX) And _
'            ((MoveY+MainForm.Height)<fx.PrimaryScreen.MaxY)) Then
'            MainForm.WindowLeft = jo.RunMethod("getScreenX", Null) - oldX
'            MainForm.WindowTop = jo.RunMethod("getScreenY", Null) - oldY
'        End If
 '       Sleep(0)
    End If
End Sub
#End Region

 

[Laurent95]

Try this instead:

Private Sub imgIcon_MouseDragged (EventData As MouseEvent)
    If (rightBtnPressed) Then
        Dim jo As JavaObject = EventData
        MoveX = jo.RunMethod("getScreenX", Null) - oldX
        MoveY = jo.RunMethod("getScreenY", Null) - oldY
        [B]MainForm.WindowLeft = Max(0,Min(fx.PrimaryScreen.MaxX - MainForm.WindowWidth,jo.RunMethod("getScreenX", Null) - oldX))[/B]
        [B]MainForm.WindowTop = Max(0,Min(fx.PrimaryScreen.MaxY - MainForm.Windowheight,jo.RunMethod("getScreenY", Null) - oldY))[/B]
       ' Perfect that's the trick !!!
    End If
End Sub
#End Region

Hi stevel05,

Works perfect, even on my 17 years old Asus Laptop
Thank you for your improvement, very performant, no more latence even it's only a dual core

Have nice aftenoon,
Laurent

 

[Laurent95]

Last update, it's solved now and really smooth,
Thanks again @stevel05