Problem centering a label

Desktop wxRuby
1

Hi

I have frame.

Inside i want to put a static text as title, centered.

I use two sizers, one vertical an other horizontal.

But title is not centered, is put to left.

My code is :

require ‘wx’;

class TarefasNova < Wx::Panel

def initialize(parent)

    rect = parent.get_client_rect();



    super( parent, 1011, Wx::Point.new( 0, 0 ),  rect.get_size(),

SIMPLE_BORDER, “NovaTarefa” );

    sizer = Wx::BoxSizer.new(Wx::VERTICAL );

    box   = Wx::BoxSizer.new(Wx::HORIZONTAL);



    label = Wx::StaticText.new( self, :label => "CADASTRO DE TAREFAS

(NOVA)", :size => [250,-1] );

    box.add( label, 1, Wx::ALIGN_CENTER_VERTICAL, 5);



    sizer.add_item(box, 0, Wx::ALIGN_CENTER|Wx::ALL, 5);

 end

end

How to make my title centered in the panel?

Alejandro Michelin Salomon

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2

Hi Alejandro,

you just need one sizer on your panel. Add one spacer
(sizer.add_stretch_spacer) before and one after your text.

Like so:

sizer = BoxSizer.new HORIZONTAL
sizer.add_stretch_spacer
sizer.add StaticText.new(self, -1, 'asdf'), 0, 1
sizer.add_stretch_spacer

hth,
Christian.

Alejandro Michelin salomon wrote:

Hi

I have frame.

Inside i want to put a static text as title, centered.

I use two sizers, one vertical an other horizontal.

But title is not centered, is put to left.

My code is :

require ‘wx’;

class TarefasNova < Wx::Panel

def initialize(parent)

    rect = parent.get_client_rect();



    super( parent, 1011, Wx::Point.new( 0, 0 ),  rect.get_size(),

SIMPLE_BORDER, “NovaTarefa” );

    sizer = Wx::BoxSizer.new(Wx::VERTICAL );

    box   = Wx::BoxSizer.new(Wx::HORIZONTAL);



    label = Wx::StaticText.new( self, :label => "CADASTRO DE TAREFAS

(NOVA)", :size => [250,-1] );

    box.add( label, 1, Wx::ALIGN_CENTER_VERTICAL, 5);



    sizer.add_item(box, 0, Wx::ALIGN_CENTER|Wx::ALL, 5);

 end

end

How to make my title centered in the panel?

Alejandro Michelin Salomon

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3

Christian :

I say in the other mail “I have a frame”, brong i have a panel.

The panel is inside the main frame.

I change my code to :

class TarefasNova < Wx::Panel

def initialize(parent)

    rect = parent.get_client_rect();



    super( parent, 1011, Wx::Point.new( 0, 0 ), rect.get_size(),

          SIMPLE_BORDER,

          "NovaTarefa" );



    #sizer = Wx::BoxSizer.new(Wx::VERTICAL)



    box   = Wx::BoxSizer.new(Wx::HORIZONTAL);



    box.add_stretch_spacer();



    box.add Wx::StaticText.new(self, -1, 'asdf'), 0, 1



    #label = Wx::StaticText.new( self, :label => "CADASTRO DE

TAREFAS
(NOVA)", :size => [250,-1] );

    #box.add( label, 1, Wx::ALIGN_CENTER, 5);



    box.add_stretch_spacer();



    #sizer.add_item(box, 0, Wx::ALIGN_CENTER|Wx::ALL, 5);

end

end

But the text is not centered, the text is in the left.

Exist some diferences between frame and panel to user sizer?

De: [email protected]
[mailto:[email protected]] Em nome de Christian Schmidt
Enviada em: quinta-feira, 19 de março de 2009 19:49
Para: [email protected]
Assunto: Re: [wxruby-users] Problem centering a label

Hi Alejandro,

you just need one sizer on your panel. Add one spacer
(sizer.add_stretch_spacer) before and one after your text.

Like so:

sizer = BoxSizer.new HORIZONTAL
sizer.add_stretch_spacer
sizer.add StaticText.new(self, -1, 'asdf'), 0, 1
sizer.add_stretch_spacer

hth,
Christian.

Alejandro Michelin salomon wrote:

    super( parent, 1011, Wx::Point.new( 0, 0 ),  rect.get_size(),
    label = Wx::StaticText.new( self, :label => "CADASTRO DE TAREFAS
 end

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–
Posted via http://www.ruby-forum.com/.

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4

Hi

Christian Schmidt wrote:

  super( parent, 1011, {:style => SIMPLE_BORDER, :name

=>“NovaTarefa”} );

  box = Wx::BoxSizer.new(Wx::HORIZONTAL);
  box.add_stretch_spacer();
  box.add Wx::StaticText.new(self, -1, 'asdf'), 0, 1
  box.add_stretch_spacer();

Simpler, using StaticText ALIGN styles instead of extra spacers

box = Wx::VBoxSizer.new
st = Wx::StaticText.new(self, :label => ‘adsf’, :style =>
Wx::ALIGN_CENTRE)
box.add st, 0, Wx::GROW

Watch for the parents’ constructor - you needn’t set size and position.

This is a good point - use sizers to have children adjust to their
parent’s size. Also, if a window is the only child of a frame parent
(often the case with Panels inside Frames) then it will automatically
take up all the avaiable space - no sizer needed.

a

5

Hi Alejandro,

this one actually works:

class TarefasNova < Wx::Panel
def initialize(parent)
super( parent, 1011, {:style => SIMPLE_BORDER, :name
=>“NovaTarefa”} );

  box = Wx::BoxSizer.new(Wx::HORIZONTAL);
  box.add_stretch_spacer();
  box.add Wx::StaticText.new(self, -1, 'asdf'), 0, 1
  box.add_stretch_spacer();

  set_sizer box
end

end

Watch for the parents’ constructor - you needn’t set size and position.
Also never forget to call Panel#set_sizer or your sizer won’t have any
effect.

hth,
Christian.

6

Hi Alejandro,

I’m not sure to understand why you need 2 sizers but your main problem
is that you haven’t told the panel to use the sizer !

Here is a sample code where there are 3 texts :

  • at the top, the text is centered
  • at the middle, the text is left aligned
  • at the bottom, the text is right aligned

The important line is the one with self.sizer = box.
You should also use wx constants to make your code clearer.

#!/usr/bin/env ruby

wxRuby2 Sample Code. Copyright © 2004-2008 wxRuby development team

Freely reusable code: see SAMPLES-LICENSE.TXT for details

begin
require ‘rubygems’
rescue LoadError
end
require ‘wx’

class MyPanel < Wx::Panel
def initialize(parent)
super(parent)
box = Wx::BoxSizer.new (Wx::VERTICAL)
box.add_item(Wx::StaticText.new(self, :label => “Centered Title”),
:flag => Wx::ALIGN_CENTER)
box.add_item(Wx::StaticText.new(self, :label => “Leftside Text”),
:flag => Wx::ALIGN_LEFT)
box.add_item(Wx::StaticText.new(self, :label => “Rightside Text”),
:flag => Wx::ALIGN_RIGHT)
self.sizer = box
end
end

This is the minimum code to start a WxRuby app - create a Frame, and

show it.

Wx::App.run do
frame = Wx::Frame.new(nil, :title => “Minimal wxRuby App”)
panel = MyPanel.new(frame)
frame.show
end

Cheers.

Chauk-Mean.

7

Hi :

The problem is that, after call to create the child panel, i need to
call
send_size_event().

I find the solution becouse i minize the aplication to see the code in
the
editor and when i maxsimize the aplicattion the panel is ok filling all
the
frame space.

Alejandro

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8

Chauk-Mean. :

Your code runs ok in a separate file.

If i call MyPanel from my menu to put the panel in my main frame, the
code
does not work.

This code :

begin

require ‘rubygems’

rescue LoadError

end

require ‘wx’;

class TarefasNova < Wx::Panel

def initialize(parent)

super(parent)

box = Wx::BoxSizer.new (Wx::VERTICAL)

box.add_item(Wx::StaticText.new(self, :label => "Centered Title"),

:flag => Wx::ALIGN_CENTER)

box.add_item(Wx::StaticText.new(self, :label => "Leftside Text"),

:flag => Wx::ALIGN_LEFT)

box.add_item(Wx::StaticText.new(self, :label => "Rightside Text"),

:flag => Wx::ALIGN_RIGHT)

self.sizer = box

end

end

The panel only shows “Righ”.

Does not size to fill frame.

When i put :

    rect = parent.get_client_rect();



    super( parent, 1011, Wx::Point.new( 0, 0 ), rect.get_size(),

SIMPLE_BORDER, “NovaTarefa” );

This makes the panel fill frame.

The frame has menu bar and statusbar.

De: [email protected]
[mailto:[email protected]] Em nome de Chauk-Mean P.
Enviada em: sexta-feira, 20 de março de 2009 10:39
Para: General discussion of wxRuby
Assunto: Re: [wxruby-users] RES: Problem centering a label

Hi Alejandro,

I’m not sure to understand why you need 2 sizers but your main problem
is that you haven’t told the panel to use the sizer !

Here is a sample code where there are 3 texts :

  • at the top, the text is centered
  • at the middle, the text is left aligned
  • at the bottom, the text is right aligned

The important line is the one with self.sizer = box.
You should also use wx constants to make your code clearer.

#!/usr/bin/env ruby

wxRuby2 Sample Code. Copyright (c) 2004-2008 wxRuby development team

Freely reusable code: see SAMPLES-LICENSE.TXT for details

begin
require ‘rubygems’
rescue LoadError
end
require ‘wx’

class MyPanel < Wx::Panel
def initialize(parent)
super(parent)
box = Wx::BoxSizer.new (Wx::VERTICAL)
box.add_item(Wx::StaticText.new(self, :label => “Centered Title”),
:flag => Wx::ALIGN_CENTER)
box.add_item(Wx::StaticText.new(self, :label => “Leftside Text”),
:flag => Wx::ALIGN_LEFT)
box.add_item(Wx::StaticText.new(self, :label => “Rightside Text”),
:flag => Wx::ALIGN_RIGHT)
self.sizer = box
end
end

This is the minimum code to start a WxRuby app - create a Frame, and

show it.

Wx::App.run do
frame = Wx::Frame.new(nil, :title => “Minimal wxRuby App”)
panel = MyPanel.new(frame)
frame.show
end

Cheers.

Chauk-Mean.

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[email protected]
http://rubyforge.org/mailman/listinfo/wxruby-users

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