Hi,
I''m developing a user interface for querying an SQL database, where
controls are being added/deleted dynamically, while the user is working.
Everything works just fine when adding controls: you just have to
"create" the control, and then call "recalc" for the frame
where the control has been added.
At some point, I need to delete everything which was added, and start over. This
is where I start having problems.
Here is some test code, where I tried to reproduce the problem. Add a few
controls, delete them all, and add one again: you will see it does not appear at
the right place, as if the previous "destroyed" controls where still
here, somehow.
Does anyone know how to clean all childs of a frame correctly?
Best regards!
-------------------------------------------------------------
#!/usr/bin/ruby
require ''fox16''
include Fox
class MyWindow < FXMainWindow
def initialize(app)
super(app, "Window", nil, nil, DECOR_ALL, 0, 0, 400, 200)
stack = FXVerticalFrame.new(self, FRAME_NONE|LAYOUT_FILL_X|LAYOUT_FILL_Y)
# Frame where controls are being dynamically added / deleted
dynamic_frame = FXHorizontalFrame.new(stack,
FRAME_NONE|LAYOUT_FILL_X|LAYOUT_FILL_Y)
# Bottom frame for buttons
button_frame = FXHorizontalFrame.new(stack, FRAME_NONE|LAYOUT_FILL_X)
# Button that adds a control in the dynamic_frame. Works fine.
FXButton.new(button_frame, "add").connect(SEL_COMMAND) do |sender,
selector, data|
FXButton.new(dynamic_frame, "button").create
dynamic_frame.recalc
end
# Button that deletes all child windows of dynamic_frame.
# Works, except that afterwards, new controls are not added at the right
place.
FXButton.new(button_frame, "remove all").connect(SEL_COMMAND) do
|sender, selector, data|
dynamic_frame.each_child do |child|
child.destroy
end
dynamic_frame.recalc
end
end
def create
super
show(PLACEMENT_SCREEN)
end
end
if __FILE__ == $0
$app = application = FXApp.new("Attik System", "FXRuby
Test")
MyWindow.new(application)
application.create
application.run
end
-------------------------------------------------------------
Attik System web : http://www.attiksystem.ch
Philippe Lang phone: +41 26 422 13 75
rte de la Fonderie 2 gsm : +41 79 351 49 94
1700 Fribourg pgp : http://keyserver.pgp.com
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Pretty close...
Try changing the following code:
dynamic_frame.each_child do |child|
child.destroy
end
to:
dynamic_frame.each_child do |child|
dynamic_frame.removeChild(child)
end
Seems to work.
On Thu, Apr 15, 2010 at 3:31 AM, Philippe Lang <philippe.lang at
attiksystem.ch> wrote:
> Hi,
>
> I''m developing a user interface for querying an SQL database,
where
> controls are being added/deleted dynamically, while the user is working.
>
> Everything works just fine when adding controls: you just have to
"create"
> the control, and then call "recalc" for the frame where the
control has been
> added.
>
> At some point, I need to delete everything which was added, and start over.
> This is where I start having problems.
>
> Here is some test code, where I tried to reproduce the problem. Add a few
> controls, delete them all, and add one again: you will see it does not
> appear at the right place, as if the previous "destroyed"
controls where
> still here, somehow.
>
> Does anyone know how to clean all childs of a frame correctly?
>
> Best regards!
>
> -------------------------------------------------------------
> #!/usr/bin/ruby
>
> require ''fox16''
>
> include Fox
>
> class MyWindow < FXMainWindow
>
> def initialize(app)
>
> super(app, "Window", nil, nil, DECOR_ALL, 0, 0, 400, 200)
>
> stack = FXVerticalFrame.new(self,
> FRAME_NONE|LAYOUT_FILL_X|LAYOUT_FILL_Y)
>
> # Frame where controls are being dynamically added / deleted
> dynamic_frame = FXHorizontalFrame.new(stack,
> FRAME_NONE|LAYOUT_FILL_X|LAYOUT_FILL_Y)
>
> # Bottom frame for buttons
> button_frame = FXHorizontalFrame.new(stack, FRAME_NONE|LAYOUT_FILL_X)
>
> # Button that adds a control in the dynamic_frame. Works fine.
> FXButton.new(button_frame, "add").connect(SEL_COMMAND) do
|sender,
> selector, data|
> FXButton.new(dynamic_frame, "button").create
> dynamic_frame.recalc
> end
>
> # Button that deletes all child windows of dynamic_frame.
> # Works, except that afterwards, new controls are not added at the right
> place.
> FXButton.new(button_frame, "remove all").connect(SEL_COMMAND)
do
> |sender, selector, data|
> dynamic_frame.each_child do |child|
> child.destroy
> end
> dynamic_frame.recalc
> end
>
> end
>
> def create
> super
> show(PLACEMENT_SCREEN)
> end
>
> end
>
> if __FILE__ == $0
> $app = application = FXApp.new("Attik System", "FXRuby
Test")
> MyWindow.new(application)
> application.create
> application.run
> end
>
> -------------------------------------------------------------
> Attik System web : http://www.attiksystem.ch
> Philippe Lang phone: +41 26 422 13 75
> rte de la Fonderie 2 gsm : +41 79 351 49 94
> 1700 Fribourg pgp : http://keyserver.pgp.com
>
>
>
> _______________________________________________
> fxruby-users mailing list
> fxruby-users at rubyforge.org
> http://rubyforge.org/mailman/listinfo/fxruby-users
>
--
If you are not the intended recipient, you are hereby notified
that any dissemination, distribution, copying or other use of
this communication is strictly prohibited. If you have
received this communication in error, please notify us
immediately.
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Hi,
Thanks Joey, your solution works fine.
But there is something strange when deleting children of an FXScrollWindow: it
always ends up with a SEGMENTION FAULT on my computer. Does anyone have the same
problem? You can use the test code below: clicking on the "remove
scroll_frame children" button crashes the application. The other 2 buttons
work correctly.
I suspect a bug in FXRuby of Fox...
My config: Windows XP, Ruby 1.8.6 patch level 111, patched FXRuby 1.6.19.
-------------------------------------------------------------
#!/usr/bin/ruby
require ''fox16''
include Fox
class MyWindow < FXMainWindow
def initialize(app)
super(app, "Window", nil, nil, DECOR_ALL, 0, 0, 400, 150)
stack_frame = FXVerticalFrame.new(self,
FRAME_NONE|LAYOUT_FILL_X|LAYOUT_FILL_Y)
scroll_frame = FXScrollWindow.new(stack_frame,
LAYOUT_FILL_X|LAYOUT_FILL_Y|LAYOUT_SIDE_TOP)
matrix_frame = FXMatrix.new(scroll_frame, 10,
MATRIX_BY_COLUMNS|LAYOUT_FILL_X|LAYOUT_FILL_Y)
(1..17).each do
FXButton.new(matrix_frame, "button")
end
# Bottom frame for buttons
button_frame = FXVerticalFrame.new(stack_frame, FRAME_NONE|LAYOUT_FILL_X)
# Removes all children from stack_frame container: OK
FXButton.new(button_frame, "remove stack_frame
children").connect(SEL_COMMAND) do |sender, selector, data|
stack_frame.each_child do |child|
stack_frame.removeChild(child)
end
stack_frame.recalc
end
# Removes all children from stack_frame container: SEGMENTATION FAULT
FXButton.new(button_frame, "remove scroll_frame
children").connect(SEL_COMMAND) do |sender, selector, data|
scroll_frame.each_child do |child|
scroll_frame.removeChild(child)
end
scroll_frame.recalc
end
# Removes all children from stack_frame container: OK
FXButton.new(button_frame, "remove matrix_frame
children").connect(SEL_COMMAND) do |sender, selector, data|
matrix_frame.each_child do |child|
matrix_frame.removeChild(child)
end
matrix_frame.recalc
end
end
def create
super
show(PLACEMENT_SCREEN)
end
end
if __FILE__ == $0
$app = application = FXApp.new("Attik System", "FXRuby
Test")
MyWindow.new(application)
application.create
application.run
end
-------------------------------------------------------------
Attik System web : http://www.attiksystem.ch
Philippe Lang phone: +41 26 422 13 75
rte de la Fonderie 2 gsm : +41 79 351 49 94
1700 Fribourg pgp : http://keyserver.pgp.com
> -----Message d''origine-----
> De?: fxruby-users-bounces at rubyforge.org [mailto:fxruby-users-
> bounces at rubyforge.org] De la part de Joey Kinsella
> Envoy??: jeudi 15 avril 2010 19:42
> ??: fxruby-users at rubyforge.org
> Objet?: Re: [fxruby-users] Adding / Deleting controls dynamically
>
> Pretty close...
>
> Try changing the following code:
>
> dynamic_frame.each_child do |child|
> child.destroy
> end
>
> to:
> dynamic_frame.each_child do |child|
> dynamic_frame.removeChild(child)
> end
>
> Seems to work.
>
>
> On Thu, Apr 15, 2010 at 3:31 AM, Philippe Lang
> <philippe.lang at attiksystem.ch> wrote:
>
>
> Hi,
>
> I''m developing a user interface for querying an SQL database,
> where controls are being added/deleted dynamically, while the user is
> working.
>
> Everything works just fine when adding controls: you just have to
> "create" the control, and then call "recalc" for the
frame where the
> control has been added.
>
> At some point, I need to delete everything which was added, and
> start over. This is where I start having problems.
>
> Here is some test code, where I tried to reproduce the problem.
> Add a few controls, delete them all, and add one again: you will see it
> does not appear at the right place, as if the previous
"destroyed"
> controls where still here, somehow.
>
> Does anyone know how to clean all childs of a frame correctly?
>
> Best regards!
>
> -------------------------------------------------------------
> #!/usr/bin/ruby
>
> require ''fox16''
>
> include Fox
>
> class MyWindow < FXMainWindow
>
> def initialize(app)
>
> super(app, "Window", nil, nil, DECOR_ALL, 0, 0, 400, 200)
>
> stack = FXVerticalFrame.new(self,
> FRAME_NONE|LAYOUT_FILL_X|LAYOUT_FILL_Y)
>
> # Frame where controls are being dynamically added / deleted
> dynamic_frame = FXHorizontalFrame.new(stack,
> FRAME_NONE|LAYOUT_FILL_X|LAYOUT_FILL_Y)
>
> # Bottom frame for buttons
> button_frame = FXHorizontalFrame.new(stack,
> FRAME_NONE|LAYOUT_FILL_X)
>
> # Button that adds a control in the dynamic_frame. Works fine.
> FXButton.new(button_frame, "add").connect(SEL_COMMAND) do
> |sender, selector, data|
> FXButton.new(dynamic_frame, "button").create
> dynamic_frame.recalc
> end
>
> # Button that deletes all child windows of dynamic_frame.
> # Works, except that afterwards, new controls are not added at
> the right place.
> FXButton.new(button_frame, "remove all").connect(SEL_COMMAND)
> do |sender, selector, data|
> dynamic_frame.each_child do |child|
> child.destroy
> end
> dynamic_frame.recalc
> end
>
> end
>
> def create
> super
> show(PLACEMENT_SCREEN)
> end
>
> end
>
> if __FILE__ == $0
> $app = application = FXApp.new("Attik System", "FXRuby
Test")
> MyWindow.new(application)
> application.create
> application.run
> end
>
> -------------------------------------------------------------
> Attik System web : http://www.attiksystem.ch
> Philippe Lang phone: +41 26 422 13 75
> rte de la Fonderie 2 gsm : +41 79 351 49 94
> 1700 Fribourg pgp : http://keyserver.pgp.com
>
>
>
> _______________________________________________
> fxruby-users mailing list
> fxruby-users at rubyforge.org
> http://rubyforge.org/mailman/listinfo/fxruby-users
>
>
>
> --
> If you are not the intended recipient, you are hereby notified that any
> dissemination, distribution, copying or other use of this communication
> is strictly prohibited. If you have received this communication in
> error, please notify us immediately.
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Am 19.04.2010 11:55, schrieb Philippe Lang:> But there is something strange when deleting children of an FXScrollWindow: it always ends up with a SEGMENTION FAULT on my computer. Does anyone have the same problem? You can use the test code below:Yup, segmentation fault here using your code supplied. Running: ruby 1.8.6 (2008-08-11 patchlevel 287) [i386-mswin32] on 64bit Win7 FXRuby: fxruby (1.6.16)