Android Question How to programm modal input window?

JonPM

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• Dec 29, 2015

• #2

There are a number of input dialogs to choose from. You can use the search feature to find a library that you like.

 

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welu1805

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• Dec 29, 2015

• #3

Yes, I know DialogView. But I would program by myself but don't know how to so.

 

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welu1805

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• Dec 29, 2015

• #4

... how to do

 

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JonPM

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• Dec 29, 2015

• #5

What help do you need exactly? Making the popup modal? Place a panel behind it with a click sub and return true

 

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welu1805

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• Dec 30, 2015

• #6

Thank you JonPM,

that was my problem. How to catch the click event of the panel. Now it works. Return True is not nessecary because pnlScreen_Click has no ReturnValue.

One small problem is still: If I press the Back-key I expect that only the modal dialog will be closed but the app closes.

 

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klaus

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• Dec 30, 2015

• #7

You need to manage this in the Activity_KeyPress event, something like this:

B4X:

Sub Activity_KeyPress (KeyCode As Int) As Boolean
    If KeyCode = KeyCodes.KEYCODE_BACK
        If PanelX.Visible = True Then
            PanelX.Visible = False
            Return True
        Else
            Return False
        End If
    End If
End Sub

 

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welu1805

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• Dec 30, 2015

• #8

Thank you Klaus, this is the solution.

 

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welu1805

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• Dec 31, 2015

• #9

I want to create an own class for the dialog. Is it possible to trap the Activity_KeyPress event within this class?

 

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klaus

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• Dec 31, 2015

• #10

No you can't.
I suggest you to add a Visible property to your class and check and handle this property in the Activity_KeyPress event routine.

 

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welu1805

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• Dec 31, 2015

• #11

I supposed it.

 

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welu1805

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• Jan 2, 2016

• #12

Hi all, best wishes for the new your!

Now I tested the library "DialogView". If I call a simple modal dialog with the folloing code

Dialog.LoadLayout("dialog1").ShowYesNo("Login", "yes", "no")

a modal dialog window appears. After pressing the back key THIS DIAOLG is closed and not the app. Because it runs in debug mode I can see that there is no new activity. Therefore it MUST be possible to trap the back key in the Dialog class in the library.

How does it work?

 

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klaus

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• Jan 2, 2016

• #13

I think that DialogView is written with Eclipse not as a B4A class compiled to a library.

 

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welu1805

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• Jan 3, 2016

• #14

I found a solution which also works within a class:

In the class is a panel for the background of the dialog called "pnlBackground"
Further there is a Sub "Show" which sets pnlBackground.Visible = True.

I added this code after "pnlBackground.Visible = True":

Dim r As Reflector
r.Target = pnlBackground
r.SetOnKeyListener("OnKeyPress")
r.RunMethod2("setFocusable", "True", "java.lang.boolean")
r.RunMethod2("setFocusableInTouchMode", "True", "java.lang.boolean")
pnlBackground.RequestFocus

This is the Sub "OnKeyPress":

Sub OnKeyPress(ViewTag As Object, KeyCode As Int, KeyEvent As Object) As Boolean
If KeyCode = KeyCodes.KEYCODE_BACK Then
If pnlBackground.Visible Then
pnlBackground.Visible = False
Return(True)
Else
Return(False)
End If
Else
Return(False)
End If
End Sub

Now the back key closes only the dialog.

 

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klaus

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• Jan 3, 2016

• #15

You should use the

B4X:

 Tags when you post code.
[ATTACH=full]40231[/ATTACH]

 

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welu1805

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• Jan 4, 2016

• #16

This is #14 again with formatted code:

I found a solution which also works within a class:

In the class is a panel for the background of the dialog called "pnlBackground"
Further there is a Sub "Show" which sets pnlBackground.Visible = True.

I added this code after "pnlBackground.Visible = True":

B4X:

Dim r As Reflector
r.Target = pnlBackground
r.SetOnKeyListener("OnKeyPress")
r.RunMethod2("setFocusable", "True", "java.lang.boolean")
r.RunMethod2("setFocusableInTouchMode", "True", "java.lang.boolean")
pnlBackground.RequestFocus

This is the Sub "OnKeyPress":

B4X:

Sub OnKeyPress(ViewTag As Object, KeyCode As Int, KeyEvent As Object) As Boolean
  If KeyCode = KeyCodes.KEYCODE_BACK Then
    If pnlBackground.Visible Then
      pnlBackground.Visible = False
      Return(True)
    Else
      Return(False)
    End If
  Else
    Return(False)
  End If
End Sub

Now the back key closes only the dialog.

 

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