A possibile bug with radiobuttons?
lazarus / 32-Linux

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jls890 · 2012-11-11 06:20

Hi.
This is my first post in this forum.
Congratulaltions for your very very nice program!
I am creating a card game called "Cross Truco"
http://sourceforge.net/projects/crosstruco
and I am using the "RadioButtons" to know who is going to play.
In the "truco" situation human must press a button. In this case Linux
version does not work in the same way than Windows one. The program
just does not stop to wait the button.
It seems to me it is unable to have a visible radiobutton non checked.
I am trying to solve it by adding a "null radiobutton" visible, but
out of the user visible area.
Thank you.

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JuhaManninen · 2012-11-11 10:16

A simplified example would help understand the problem.

Juha

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lainz · 2012-11-11 11:07

Mira vos que interesante! Si lo escribís en español quizás pueda
ayudarte, aunque no sepa mucho de programación.

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jls890 · 2012-11-11 20:55

Dear JuhaManninen and Lainz.
Thank you very much!
This is a example of the code

 if (asktruco=true) then
  begin
    CheckBox13.Checked:=True;
    asktruco:=false;
    radiobutton2.Checked:=False;
  end;

if radiobutton2.Checked=true  then
begin       

//player 2 is going to play

CheckBox13.Checked=True activates the button, but the problem is, in
Linux, radiobutton2.Checked does not change to false
(radiobutton2.Checked:=False; does not work, it seems we cannot have
all radiobuttons unchecekd at same time) and player 2 plays without
wait for the button.
Thank you!

Querido Lainz
Muchas gracias. Voy a intentar en español.
CheckBox13.Checked=True se activa el botón, pero el problema es, en
Linux, radiobutton2.Checked no cambia a falso (radiobutton2.Checked: =
false; no funciona, parece que no puede conseguir todos los
radiobuttons unchecekd mismo tiempo) y el jugador 2 juega sin esperar
a que el botón.
¡Gracias!

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Blaazen · 2012-11-11 21:18

Yes, I can confirm on both Qt4 and GTK2. But I think TRadioButton is
native widget so probably it cannot be easily fixed (if you will
report it to bugtracker).
Maybe you should invent something else (ToggleBoxes or so).

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JuhaManninen · 2012-11-11 22:01

Quote from: Blaazen on November 11, 2012, 10:18:48 pmYes, I can
confirm on both Qt4 and GTK2. But I think TRadioButton is native
widget so probably it cannot be easily fixed (if you will report it to
bugtracker).
Maybe you should invent something else (ToggleBoxes or so).

Yes, "radiobutton.Checked:=False;" depends on widgetset.
LCL binds to native widgets and this is the downside: sometimes they
behave differently.
I think you have 2 choices:
1. Use TRadioGroup. It may be difficult with your graphical GUI
layout.
2. Use TToggleBox (as Blaazen suggested) or TCheckbox to simulate the
radiobuttons.

Juha

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jls890 · 2012-11-12 01:28

Hi Juha and Blaazen.

Well, so it is not a bug, but a feature. I am now using just another
radiobutton to avoid this problem. I will try to learn about
TRadioGroup and TToggleBox.

Thank you very much!