How to put widget in CUSTOM GtkContainer
Hi there, my name is Alan and I have some troubles with GtkContainer.
It's about 2 days, I already have spent trying to solve it, but I (i
guess) can't.
I'm writing a program, which looks like:
+-+
| Main Window (GtkWindow) |
| +-+ |
| | My custom widget| |
| | +-+ | |
| | | GtkButton | | |
| | +-+ | |
| +-+ |
+-+
I need some approach to place a GtkButton in my custom widget. I found
(from GTK+ sources) that GtkTreeView, GtkNotebook (and others) inherits
from GtkContainer . So, I decide to inherit my widget not from
GtkWidget, but from GtkContainer.
typedef struct _GridGrid;
typedef struct _GridClass GridClass;
struct _Grid
{
GtkContainer parent;
};
struct _GridClass
{
GtkContainerClass parent_class;
};
And my _get_type function looks like:
GtkType
grid_get_type ()
{
static GtkType grid_type = 0;
if (!grid_type)
{
const GTypeInfo object_info =
{
sizeof (GtkContainerClass),
NULL,
NULL,
(GClassInitFunc) grid_class_init,
NULL,
NULL,
sizeof (Grid),
0,
(GInstanceInitFunc) grid_init,
NULL,
};
grid_type = g_type_register_static (GTK_TYPE_CONTAINER,
g_intern_static_string ("Grid"), &object_info, 0);
}
return grid_type;
}
The main feature of this function is GTK_TYPE_CONTAINER ;-) You see ;-)
Next in my program, I'm creating my widget (grid) with that:
[...]
grid = grid_new ();
gtk_container_add (GTK_CONTAINER (window), grid);
[...]
So, my problem starts here: at _new() function. I want to create
GtkButton and place it in my widget.
GtkWidget*
grid_new ()
{
Grid *grid;
grid = g_object_new (grid_get_type (), NULL);
button = gtk_button_new_with_label ("Test");
gtk_widget_set_parent (button, GTK_WIDGET (grid));
gtk_widget_show (button);
return GTK_WIDGET (grid);
}
Everything right and works without errors ;-) But nothing happens. I
can't see a GtkButton ;-)
How to solve it? I need some way for "draw" (expose) GtkButton in my
custom widget ;-) How to do it?
P.S. I extremely think, that I just forgot something. But there are no
tutorials about it ;-) "Information vacuum", so I decide to ask in
mailing-lists.
P.P.S. Only information about custom widget creation is a GTK sources,
but (even with it) I can't solve my problem. ;-)
P.P.P.S. Also, I really want to understand how GtkBox works ;-)
Thank you.
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Re: How to put widget in CUSTOM GtkContainer
AlannY wrote:
> Hi there, my name is Alan and I have some troubles with GtkContainer.
>
> It's about 2 days, I already have spent trying to solve it, but I (i
> guess) can't.
>
> I'm writing a program, which looks like:
> +-+
> | Main Window (GtkWindow) |
> | +-+ |
> | | My custom widget| |
> | | +-+ | |
> | | | GtkButton | | |
> | | +-+ | |
> | +-+ |
> +-+
>
> I need some approach to place a GtkButton in my custom widget. I found
> (from GTK+ sources) that GtkTreeView, GtkNotebook (and others) inherits
> from GtkContainer . So, I decide to inherit my widget not from
> GtkWidget, but from GtkContainer.
>
> typedef struct _GridGrid;
> typedef struct _GridClass GridClass;
>
> struct _Grid
> {
>GtkContainer parent;
> };
>
> struct _GridClass
> {
>GtkContainerClass parent_class;
> };
>
> And my _get_type function looks like:
>
> GtkType
> grid_get_type ()
> {
>static GtkType grid_type = 0;
>
>if (!grid_type)
> {
>const GTypeInfo object_info =
>{
> sizeof (GtkContainerClass),
> NULL,
> NULL,
> (GClassInitFunc) grid_class_init,
That still isn't the whole code! What does grid_class_init() do? Attach
both the whole grid header and source file to the email.
> NULL,
> NULL,
> sizeof (Grid),
> 0,
> (GInstanceInitFunc) grid_init,
> NULL,
>};
>
>grid_type = g_type_register_static (GTK_TYPE_CONTAINER,
> g_intern_static_string ("Grid"), &object_info, 0);
> }
>
>return grid_type;
> }
>
> The main feature of this function is GTK_TYPE_CONTAINER ;-) You see ;-)
>
> Next in my program, I'm creating my widget (grid) with that:
>
> [...]
> grid = grid_new ();
> gtk_container_add (GTK_CONTAINER (window), grid);
> [...]
>
> So, my problem starts here: at _new() function. I want to create
> GtkButton and place it in my widget.
>
> GtkWidget*
> grid_new ()
> {
>Grid *grid;
>
>grid = g_object_new (grid_get_type (), NULL);
>
>button = gtk_button_new_with_label ("Test");
>gtk_widget_set_parent (button, GTK_WIDGET (grid));
>gtk_widget_show (button);
>
>return GTK_WIDGET (grid);
> }
>
> Everything right and works without errors ;-) But nothing happens. I
> can't see a GtkButton ;-)
>
> How to solve it? I need some way for "draw" (expose) GtkButton in my
> custom widget ;-) How to do it?
>
> P.S. I extremely think, that I just forgot something. But there are no
> tutorials about it ;-) "Information vacuum", so I decide to ask in
> mailing-lists.
> P.P.S. Only information about custom widget creation is a GTK sources,
> but (even with it) I can't solve my problem. ;-)
> P.P.P.S. Also, I really want to understand how GtkBox works ;-)
And stop creating new threads... This is your third thread in
gtk-app-devel where you ask the same question.
tom
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Re: How to put widget in CUSTOM GtkContainer
I don't believe that using set_parent() will actually place the widget
inside the container; try gtk_container_add(GTK_CONTAINER(grid), widget);
instead
2008/4/29 Tomas Carnecky <[EMAIL PROTECTED]>:
> AlannY wrote:
> > Hi there, my name is Alan and I have some troubles with GtkContainer.
> >
> > It's about 2 days, I already have spent trying to solve it, but I (i
> > guess) can't.
> >
> > I'm writing a program, which looks like:
> > +-+
> > | Main Window (GtkWindow) |
> > | +-+ |
> > | | My custom widget| |
> > | | +-+ | |
> > | | | GtkButton | | |
> > | | +-+ | |
> > | +-+ |
> > +-+
> >
> > I need some approach to place a GtkButton in my custom widget. I found
> > (from GTK+ sources) that GtkTreeView, GtkNotebook (and others) inherits
> > from GtkContainer . So, I decide to inherit my widget not from
> > GtkWidget, but from GtkContainer.
> >
> > typedef struct _GridGrid;
> > typedef struct _GridClass GridClass;
> >
> > struct _Grid
> > {
> >GtkContainer parent;
> > };
> >
> > struct _GridClass
> > {
> >GtkContainerClass parent_class;
> > };
> >
> > And my _get_type function looks like:
> >
> > GtkType
> > grid_get_type ()
> > {
> >static GtkType grid_type = 0;
> >
> >if (!grid_type)
> > {
> >const GTypeInfo object_info =
> >{
> > sizeof (GtkContainerClass),
> > NULL,
> > NULL,
> > (GClassInitFunc) grid_class_init,
>
> That still isn't the whole code! What does grid_class_init() do? Attach
> both the whole grid header and source file to the email.
>
> > NULL,
> > NULL,
> > sizeof (Grid),
> > 0,
> > (GInstanceInitFunc) grid_init,
> > NULL,
> >};
> >
> >grid_type = g_type_register_static (GTK_TYPE_CONTAINER,
> > g_intern_static_string ("Grid"), &object_info, 0);
> > }
> >
> >return grid_type;
> > }
> >
> > The main feature of this function is GTK_TYPE_CONTAINER ;-) You see ;-)
> >
> > Next in my program, I'm creating my widget (grid) with that:
> >
> > [...]
> > grid = grid_new ();
> > gtk_container_add (GTK_CONTAINER (window), grid);
> > [...]
> >
> > So, my problem starts here: at _new() function. I want to create
> > GtkButton and place it in my widget.
> >
> > GtkWidget*
> > grid_new ()
> > {
> >Grid *grid;
> >
> >grid = g_object_new (grid_get_type (), NULL);
> >
> >button = gtk_button_new_with_label ("Test");
> >gtk_widget_set_parent (button, GTK_WIDGET (grid));
> >gtk_widget_show (button);
> >
> >return GTK_WIDGET (grid);
> > }
> >
> > Everything right and works without errors ;-) But nothing happens. I
> > can't see a GtkButton ;-)
> >
> > How to solve it? I need some way for "draw" (expose) GtkButton in my
> > custom widget ;-) How to do it?
> >
> > P.S. I extremely think, that I just forgot something. But there are no
> > tutorials about it ;-) "Information vacuum", so I decide to ask in
> > mailing-lists.
> > P.P.S. Only information about custom widget creation is a GTK sources,
> > but (even with it) I can't solve my problem. ;-)
> > P.P.P.S. Also, I really want to understand how GtkBox works ;-)
>
> And stop creating new threads... This is your third thread in
> gtk-app-devel where you ask the same question.
>
> tom
>
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>
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Re: How to put widget in CUSTOM GtkContainer
Tomas Carnecky wrote:
> AlannY wrote:
> That still isn't the whole code! What does grid_class_init() do? Attach
> both the whole grid header and source file to the email.
/* ** */
static void
grid_class_init (GridClass *class)
{
GtkObjectClass *object_class;
GtkWidgetClass *widget_class;
object_class = (GtkObjectClass*) class;
widget_class = (GtkWidgetClass*) class;
parent_class = gtk_type_class (gtk_widget_get_type ());
object_class->destroy = grid_destroy;
widget_class->realize = grid_realize;
widget_class->expose_event = grid_expose;
}
/* ** */
static void
grid_init (Grid *grid)
{
}
/* ** */
static void
grid_realize (GtkWidget *widget)
{
Grid *grid;
GdkWindowAttr attributes;
gint attributes_mask;
g_return_if_fail (widget != NULL);
g_return_if_fail (IS_GRID (widget));
GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
grid = GRID (widget);
attributes.x = widget->allocation.x;
attributes.y = widget->allocation.y;
attributes.width = widget->allocation.width;
attributes.height = widget->allocation.height;
attributes.wclass = GDK_INPUT_OUTPUT;
attributes.window_type = GDK_WINDOW_CHILD;
attributes.event_mask = gtk_widget_get_events (widget) |
GDK_EXPOSURE_MASK;
attributes.visual = gtk_widget_get_visual (widget);
attributes.colormap = gtk_widget_get_colormap (widget);
attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
widget->window = gdk_window_new (widget->parent->window, &attributes,
attributes_mask);
widget->style = gtk_style_attach (widget->style, widget->window);
gdk_window_set_user_data (widget->window, widget);
gtk_style_set_background (widget->style, widget->window,
GTK_STATE_ACTIVE);
}
/* ** */
static gboolean
grid_expose (GtkWidget *widget,
GdkEventExpose *event)
{
g_return_val_if_fail (widget != NULL, FALSE);
g_return_val_if_fail (IS_GRID (widget), FALSE);
g_return_val_if_fail (event != NULL, FALSE);
if (event->count > 0)
return FALSE;
return FALSE;
}
/* ** */
static void
grid_destroy (GtkObject *object)
{
g_return_if_fail (object != NULL);
g_return_if_fail (IS_GRID (object));
if (GTK_OBJECT_CLASS (parent_class)->destroy)
(* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
}
/* ** */
That's all I have ;-)
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Re: How to put widget in CUSTOM GtkContainer
Milosz Derezynski wrote: > I don't believe that using set_parent() will actually place the widget > inside the container; try gtk_container_add(GTK_CONTAINER(grid), > widget); instead I don't believe in it too ;-) So I decide to ask what to do ;-) gtk_container_add not works ;-) ___ gtk-list mailing list gtk-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-list
Re: How to put widget in CUSTOM GtkContainer
On Tue, 2008-04-29 at 18:03 +0400, AlannY wrote: > Milosz Derezynski wrote: > > I don't believe that using set_parent() will actually place the widget > > inside the container; try gtk_container_add(GTK_CONTAINER(grid), > > widget); instead > > I don't believe in it too ;-) So I decide to ask what to do ;-) > gtk_container_add not works ;-) could you please stop wincing? it's neither funny nor appropriate. you're not implementing the GtkContainer virtual functions. you're also adding a GdkWindow to a container widget - which is not recommended. you should read the tutorial on how to subclass a GObject first: http://library.gnome.org/devel/gobject/stable/howto-gobject.html and then read the documentation and implementations of GtkContainer, starting with something simple like GtkBin. you might also ponder on switching to another language altogether. ciao, Emmanuele. -- Emmanuele Bassi, W: http://www.emmanuelebassi.net B: http://log.emmanuelebassi.net ___ gtk-list mailing list gtk-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-list
Re: How to put widget in CUSTOM GtkContainer
AlannY wrote:
> Tomas Carnecky wrote:
>> AlannY wrote:
>> That still isn't the whole code! What does grid_class_init() do? Attach
>> both the whole grid header and source file to the email.
>
> /* ** */
>
> static void
> grid_class_init (GridClass *class)
> {
>GtkObjectClass *object_class;
>GtkWidgetClass *widget_class;
>
>object_class = (GtkObjectClass*) class;
>widget_class = (GtkWidgetClass*) class;
>
>parent_class = gtk_type_class (gtk_widget_get_type ());
>
>object_class->destroy = grid_destroy;
>
>widget_class->realize = grid_realize;
>widget_class->expose_event = grid_expose;
here you have to set GtkContainerClass->add, remove, forall and
child_type. See
http://svn.gnome.org/viewvc/gtk%2B/trunk/gtk/gtkbin.c?revision=19491&view=markup
as an example of a widget that derives from GtkContainer.
> }
>
> /* ** */
> static void
> grid_init (Grid *grid)
> {
> }
>
> /* ** */
> static void
> grid_realize (GtkWidget *widget)
> {
>Grid *grid;
>GdkWindowAttr attributes;
>gint attributes_mask;
>
>g_return_if_fail (widget != NULL);
>g_return_if_fail (IS_GRID (widget));
>
>GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
>grid = GRID (widget);
>
>attributes.x = widget->allocation.x;
>attributes.y = widget->allocation.y;
>attributes.width = widget->allocation.width;
>attributes.height = widget->allocation.height;
>attributes.wclass = GDK_INPUT_OUTPUT;
>attributes.window_type = GDK_WINDOW_CHILD;
>attributes.event_mask = gtk_widget_get_events (widget) |
> GDK_EXPOSURE_MASK;
>attributes.visual = gtk_widget_get_visual (widget);
>attributes.colormap = gtk_widget_get_colormap (widget);
>
>attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
>widget->window = gdk_window_new (widget->parent->window, &attributes,
> attributes_mask);
>
>widget->style = gtk_style_attach (widget->style, widget->window);
>
>gdk_window_set_user_data (widget->window, widget);
>
>gtk_style_set_background (widget->style, widget->window,
> GTK_STATE_ACTIVE);
> }
>
> /* ** */
> static gboolean
> grid_expose (GtkWidget *widget,
> GdkEventExpose *event)
> {
>g_return_val_if_fail (widget != NULL, FALSE);
>g_return_val_if_fail (IS_GRID (widget), FALSE);
>g_return_val_if_fail (event != NULL, FALSE);
>
>if (event->count > 0)
> return FALSE;
>
>return FALSE;
> }
>
> /* ** */
> static void
> grid_destroy (GtkObject *object)
> {
>g_return_if_fail (object != NULL);
>g_return_if_fail (IS_GRID (object));
>
>if (GTK_OBJECT_CLASS (parent_class)->destroy)
> (* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
> }
>
> /* ** */
>
> That's all I have ;-)
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>
--
So Long, and Thanks for All the Fish
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