Re: How to get a transparent GtkWindow (fremantle)
On Thu, 2009-11-12 at 17:21 +0100, ext Luca Donaggio wrote: Thanks a lot Kimmo! At least, now I know what's happening! Now, what to do to solve the problem? If HildonAppMenu behaves like this by design (and if the bug regards only the fact that it is first mapped and then unmapped while it shouldn't be mapped at all), is there a way to create a floating top level widget on top of a HildonWindow or it is somewhat forbidden by the actual implementation? I don't want to continue the development in the wrong direction, maybe it's better if I stop here and redisign my app to not include the offending widget and find another way to present the same informations to the user - but let me say that I grew somewhat fond of my transparent-overlayed-unobtrusive-image-details-window! I think the cleanest (and most risk-free) solution is that you create the transparent window as a child window of the main window right from the beginning. But I'm not sure how Gtk allows that. Better solution would be fixing the WM so that it allows rgba in dialogs, but that can be more work... -Kimmo What do you think? -- Luca Donaggio 2009/11/11 Kimmo Hämäläinen kimmo.hamalai...@nokia.com On Wed, 2009-11-11 at 08:28 +0100, Hamalainen Kimmo (Nokia- D/Helsinki) wrote: On Tue, 2009-11-10 at 16:15 +0100, ext Luca Donaggio wrote: I thought it was somewhat related to transparency because doing this: gdk_window_reparent(win-window,gtk_widget_get_window (GTK_WIDGET (mainwin)),300,200); makes the HildonAppMenu work again at the price of loosing the transparency effect (modified code attached). Reparenting 'win-window' makes it a child of 'mainwin'. That is completely different ballgame than the original code, which keeps 'win- window' a top-level window (child of the root). When the window is not top-level, it's not managed by the window manager anymore, but it could also cause something in Gtk/Hildon (at least I have checked all places deleting windows in hildon-desktop to no avail). Finally I found the reason for hiding the menu! It's in libhildon function hildon_app_menu_find_intruder. It thinks that the window with the This is an RGBA window label is an intruder (such as dialog etc.) and closes the menu as soon as it is mapped. This seems like a bug since the menu should not be mapped in the first place if this intruder is already there at mapping time. To summarize: this is libhildon bug and hildon-desktop is completely innocent (at last...)! ;) -Kimmo -Kimmo -- Luca Donaggio 2009/11/10 Kimmo Hämäläinen kimmo.hamalai...@nokia.com On Tue, 2009-11-10 at 14:12 +0100, ext Luca Donaggio wrote: Hi Kimmo, I'm sorry to bother you again, but the problem I'm facing is not how to get a transparent window, but that if I create such a window the HildonAppMenu of its parent HildonWindow doesn't show anymore. I (slightly) modified your code to exemplify my situation. Ah, yes, I can see it. Looks like the menu is unmapped immediately when it is shown. It's weird, I'm not yet sure what unmaps it... Now it looks like hildon-desktop is not unmapping it, so it could be widget side problem also. I'll try to find out. BTW. this problem is not related to the transparency: opaque window does the same. -Kimmo Thanks for your time, Luca Donaggio 2009/11/10 Kimmo Hämäläinen kimmo.hamalai...@nokia.com Hi, Sorry, took some time, I was busy with some bug fixing... I started with the Home applet example and managed to whip up a small example (attached) that shows a transparent pop- up
Re: How to get a transparent GtkWindow (fremantle)
On Fri, 2009-11-13 at 10:44 +0100, Hamalainen Kimmo (Nokia-D/Helsinki) wrote: On Thu, 2009-11-12 at 17:21 +0100, ext Luca Donaggio wrote: Thanks a lot Kimmo! At least, now I know what's happening! Now, what to do to solve the problem? If HildonAppMenu behaves like this by design (and if the bug regards only the fact that it is first mapped and then unmapped while it shouldn't be mapped at all), is there a way to create a floating top level widget on top of a HildonWindow or it is somewhat forbidden by the actual implementation? I don't want to continue the development in the wrong direction, maybe it's better if I stop here and redisign my app to not include the offending widget and find another way to present the same informations to the user - but let me say that I grew somewhat fond of my transparent-overlayed-unobtrusive-image-details-window! I think the cleanest (and most risk-free) solution is that you create the transparent window as a child window of the main window right from the beginning. But I'm not sure how Gtk allows that. Better solution would be fixing the WM so that it allows rgba in dialogs, but that can be more work... I checked the WM support: it seems to be just a matter of commenting out the offending code in mb-wm-client.c. But if you use a dialog, your dialog is closed before you can access the application menu, which is probably what you are trying to do. -Kimmo -Kimmo What do you think? -- Luca Donaggio 2009/11/11 Kimmo Hämäläinen kimmo.hamalai...@nokia.com On Wed, 2009-11-11 at 08:28 +0100, Hamalainen Kimmo (Nokia- D/Helsinki) wrote: On Tue, 2009-11-10 at 16:15 +0100, ext Luca Donaggio wrote: I thought it was somewhat related to transparency because doing this: gdk_window_reparent(win-window,gtk_widget_get_window (GTK_WIDGET (mainwin)),300,200); makes the HildonAppMenu work again at the price of loosing the transparency effect (modified code attached). Reparenting 'win-window' makes it a child of 'mainwin'. That is completely different ballgame than the original code, which keeps 'win- window' a top-level window (child of the root). When the window is not top-level, it's not managed by the window manager anymore, but it could also cause something in Gtk/Hildon (at least I have checked all places deleting windows in hildon-desktop to no avail). Finally I found the reason for hiding the menu! It's in libhildon function hildon_app_menu_find_intruder. It thinks that the window with the This is an RGBA window label is an intruder (such as dialog etc.) and closes the menu as soon as it is mapped. This seems like a bug since the menu should not be mapped in the first place if this intruder is already there at mapping time. To summarize: this is libhildon bug and hildon-desktop is completely innocent (at last...)! ;) -Kimmo -Kimmo -- Luca Donaggio 2009/11/10 Kimmo Hämäläinen kimmo.hamalai...@nokia.com On Tue, 2009-11-10 at 14:12 +0100, ext Luca Donaggio wrote: Hi Kimmo, I'm sorry to bother you again, but the problem I'm facing is not how to get a transparent window, but that if I create such a window the HildonAppMenu of its parent HildonWindow doesn't show anymore. I (slightly) modified your code to exemplify my situation. Ah, yes, I can see it. Looks like the menu is unmapped immediately when it is shown. It's weird, I'm not yet sure what unmaps it... Now it looks like hildon-desktop is not unmapping it, so it could be widget side problem also. I'll try to find out. BTW. this problem is not related to the transparency: opaque window does the same. -Kimmo Thanks for your time, Luca Donaggio 2009/11/10 Kimmo Hämäläinen
Re: How to get a transparent GtkWindow (fremantle)
Thanks a lot Kimmo! At least, now I know what's happening! Now, what to do to solve the problem? If HildonAppMenu behaves like this by design (and if the bug regards only the fact that it is first mapped and then unmapped while it shouldn't be mapped at all), is there a way to create a floating top level widget on top of a HildonWindow or it is somewhat forbidden by the actual implementation? I don't want to continue the development in the wrong direction, maybe it's better if I stop here and redisign my app to not include the offending widget and find another way to present the same informations to the user - but let me say that I grew somewhat fond of my transparent-overlayed-unobtrusive-image-details-window! What do you think? -- Luca Donaggio 2009/11/11 Kimmo Hämäläinen kimmo.hamalai...@nokia.com On Wed, 2009-11-11 at 08:28 +0100, Hamalainen Kimmo (Nokia-D/Helsinki) wrote: On Tue, 2009-11-10 at 16:15 +0100, ext Luca Donaggio wrote: I thought it was somewhat related to transparency because doing this: gdk_window_reparent(win-window,gtk_widget_get_window(GTK_WIDGET (mainwin)),300,200); makes the HildonAppMenu work again at the price of loosing the transparency effect (modified code attached). Reparenting 'win-window' makes it a child of 'mainwin'. That is completely different ballgame than the original code, which keeps 'win- window' a top-level window (child of the root). When the window is not top-level, it's not managed by the window manager anymore, but it could also cause something in Gtk/Hildon (at least I have checked all places deleting windows in hildon-desktop to no avail). Finally I found the reason for hiding the menu! It's in libhildon function hildon_app_menu_find_intruder. It thinks that the window with the This is an RGBA window label is an intruder (such as dialog etc.) and closes the menu as soon as it is mapped. This seems like a bug since the menu should not be mapped in the first place if this intruder is already there at mapping time. To summarize: this is libhildon bug and hildon-desktop is completely innocent (at last...)! ;) -Kimmo -Kimmo -- Luca Donaggio 2009/11/10 Kimmo Hämäläinen kimmo.hamalai...@nokia.com On Tue, 2009-11-10 at 14:12 +0100, ext Luca Donaggio wrote: Hi Kimmo, I'm sorry to bother you again, but the problem I'm facing is not how to get a transparent window, but that if I create such a window the HildonAppMenu of its parent HildonWindow doesn't show anymore. I (slightly) modified your code to exemplify my situation. Ah, yes, I can see it. Looks like the menu is unmapped immediately when it is shown. It's weird, I'm not yet sure what unmaps it... Now it looks like hildon-desktop is not unmapping it, so it could be widget side problem also. I'll try to find out. BTW. this problem is not related to the transparency: opaque window does the same. -Kimmo Thanks for your time, Luca Donaggio 2009/11/10 Kimmo Hämäläinen kimmo.hamalai...@nokia.com Hi, Sorry, took some time, I was busy with some bug fixing... I started with the Home applet example and managed to whip up a small example (attached) that shows a transparent pop-up window. -Kimmo ___ maemo-developers mailing list maemo-developers@maemo.org https://lists.maemo.org/mailman/listinfo/maemo-developers ___ maemo-developers mailing list maemo-developers@maemo.org https://lists.maemo.org/mailman/listinfo/maemo-developers
Re: How to get a transparent GtkWindow (fremantle)
On Wed, 2009-11-11 at 08:28 +0100, Hamalainen Kimmo (Nokia-D/Helsinki) wrote: On Tue, 2009-11-10 at 16:15 +0100, ext Luca Donaggio wrote: I thought it was somewhat related to transparency because doing this: gdk_window_reparent(win-window,gtk_widget_get_window(GTK_WIDGET (mainwin)),300,200); makes the HildonAppMenu work again at the price of loosing the transparency effect (modified code attached). Reparenting 'win-window' makes it a child of 'mainwin'. That is completely different ballgame than the original code, which keeps 'win- window' a top-level window (child of the root). When the window is not top-level, it's not managed by the window manager anymore, but it could also cause something in Gtk/Hildon (at least I have checked all places deleting windows in hildon-desktop to no avail). Finally I found the reason for hiding the menu! It's in libhildon function hildon_app_menu_find_intruder. It thinks that the window with the This is an RGBA window label is an intruder (such as dialog etc.) and closes the menu as soon as it is mapped. This seems like a bug since the menu should not be mapped in the first place if this intruder is already there at mapping time. To summarize: this is libhildon bug and hildon-desktop is completely innocent (at last...)! ;) -Kimmo -Kimmo -- Luca Donaggio 2009/11/10 Kimmo Hämäläinen kimmo.hamalai...@nokia.com On Tue, 2009-11-10 at 14:12 +0100, ext Luca Donaggio wrote: Hi Kimmo, I'm sorry to bother you again, but the problem I'm facing is not how to get a transparent window, but that if I create such a window the HildonAppMenu of its parent HildonWindow doesn't show anymore. I (slightly) modified your code to exemplify my situation. Ah, yes, I can see it. Looks like the menu is unmapped immediately when it is shown. It's weird, I'm not yet sure what unmaps it... Now it looks like hildon-desktop is not unmapping it, so it could be widget side problem also. I'll try to find out. BTW. this problem is not related to the transparency: opaque window does the same. -Kimmo Thanks for your time, Luca Donaggio 2009/11/10 Kimmo Hämäläinen kimmo.hamalai...@nokia.com Hi, Sorry, took some time, I was busy with some bug fixing... I started with the Home applet example and managed to whip up a small example (attached) that shows a transparent pop-up window. -Kimmo ___ maemo-developers mailing list maemo-developers@maemo.org https://lists.maemo.org/mailman/listinfo/maemo-developers ___ maemo-developers mailing list maemo-developers@maemo.org https://lists.maemo.org/mailman/listinfo/maemo-developers
Re: How to get a transparent GtkWindow (fremantle)
Hi,
Sorry, took some time, I was busy with some bug fixing... I started
with the Home applet example and managed to whip up a small example
(attached) that shows a transparent pop-up window.
-Kimmo
/*
gcc -Wall `pkg-config gtk+-2.0 --cflags --libs` rgba-window-example.c -o rgba-window-example
*/
#include gtk/gtk.h
static gboolean
handle_expose (GtkWidget *widget, GdkEventExpose *event)
{
cairo_t *cr;
/* Create cairo context */
cr = gdk_cairo_create (GDK_DRAWABLE (widget-window));
gdk_cairo_region (cr, event-region);
cairo_clip (cr);
/* Draw alpha background */
cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
cairo_set_source_rgba (cr, 0.5, 0.5, 0.5, 0.5);
cairo_paint (cr);
/* Free context */
cairo_destroy (cr);
return FALSE;
}
int main ()
{
GtkWidget *win, *label;
GdkScreen *screen;
gtk_init (NULL, NULL);
win = gtk_window_new (GTK_WINDOW_POPUP);
screen = gtk_widget_get_screen (win);
gtk_widget_set_colormap (win, gdk_screen_get_rgba_colormap (screen));
gtk_widget_set_app_paintable (win, TRUE);
gtk_widget_realize (win);
gdk_window_set_back_pixmap (win-window, NULL, FALSE);
gtk_window_move (GTK_WINDOW (win), 300, 200);
label = gtk_label_new (This is an RGBA window);
gtk_container_add (GTK_CONTAINER (win), label);
gtk_widget_show_all (win);
g_signal_connect (win, expose-event, G_CALLBACK (handle_expose), win);
gtk_main ();
return 0;
}
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Re: How to get a transparent GtkWindow (fremantle)
Hi Kimmo,
I'm sorry to bother you again, but the problem I'm facing is not how to get
a transparent window, but that if I create such a window the HildonAppMenu
of its parent HildonWindow doesn't show anymore.
I (slightly) modified your code to exemplify my situation.
Thanks for your time,
Luca Donaggio
2009/11/10 Kimmo Hämäläinen kimmo.hamalai...@nokia.com
Hi,
Sorry, took some time, I was busy with some bug fixing... I started
with the Home applet example and managed to whip up a small example
(attached) that shows a transparent pop-up window.
-Kimmo
/*
gcc -Wall `pkg-config gtk+-2.0 hildon-1 --cflags --libs` rgba-window-example-1.c -o rgba-window-example-1
*/
#include gtk/gtk.h
#include hildon/hildon.h
static gboolean
handle_expose (GtkWidget *widget, GdkEventExpose *event)
{
cairo_t *cr;
/* Create cairo context */
cr = gdk_cairo_create (GDK_DRAWABLE (widget-window));
gdk_cairo_region (cr, event-region);
cairo_clip (cr);
/* Draw alpha background */
cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
cairo_set_source_rgba (cr, 0.5, 0.5, 0.5, 0.5);
cairo_paint (cr);
/* Free context */
cairo_destroy (cr);
return FALSE;
}
int main ()
{
HildonProgram *prog;
HildonWindow *mainwin;
GtkWidget *win, *label1, *label2;
GdkScreen *screen;
HildonAppMenu *menu;
GtkWidget *button;
hildon_gtk_init (NULL, NULL);
prog = HILDON_PROGRAM (hildon_program_get_instance ());
mainwin = HILDON_WINDOW (hildon_window_new ());
hildon_program_add_window (prog, mainwin);
menu = HILDON_APP_MENU (hildon_app_menu_new ());
button = gtk_button_new_with_label (Quit);
g_signal_connect_after (button, clicked, G_CALLBACK (gtk_main_quit), NULL);
hildon_app_menu_append (menu, GTK_BUTTON (button));
gtk_widget_show_all (GTK_WIDGET (menu));
hildon_window_set_app_menu (mainwin, menu);
label2 = gtk_label_new (This is the main Hildon window\nThis is the main Hildon window\nThis is the main Hildon window\nThis is the main Hildon window);
gtk_container_add (GTK_CONTAINER (mainwin), label2);
gtk_widget_show_all (GTK_WIDGET (mainwin));
win = gtk_window_new (GTK_WINDOW_POPUP);
screen = gtk_widget_get_screen (win);
gtk_widget_set_colormap (win, gdk_screen_get_rgba_colormap (screen));
gtk_widget_set_app_paintable (win, TRUE);
gtk_widget_realize (win);
gdk_window_set_back_pixmap (win-window, NULL, FALSE);
gtk_window_set_transient_for (GTK_WINDOW (win), GTK_WINDOW (mainwin));
gtk_window_set_destroy_with_parent (GTK_WINDOW (win), TRUE);
gtk_window_move (GTK_WINDOW (win), 300, 200);
label1 = gtk_label_new (This is an RGBA window);
gtk_container_add (GTK_CONTAINER (win), label1);
gtk_widget_show_all (win);
g_signal_connect (win, expose-event, G_CALLBACK (handle_expose), win);
gtk_main ();
return 0;
}
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Re: How to get a transparent GtkWindow (fremantle)
On Tue, 2009-11-10 at 14:12 +0100, ext Luca Donaggio wrote: Hi Kimmo, I'm sorry to bother you again, but the problem I'm facing is not how to get a transparent window, but that if I create such a window the HildonAppMenu of its parent HildonWindow doesn't show anymore. I (slightly) modified your code to exemplify my situation. Ah, yes, I can see it. Looks like the menu is unmapped immediately when it is shown. It's weird, I'm not yet sure what unmaps it... Now it looks like hildon-desktop is not unmapping it, so it could be widget side problem also. I'll try to find out. BTW. this problem is not related to the transparency: opaque window does the same. -Kimmo Thanks for your time, Luca Donaggio 2009/11/10 Kimmo Hämäläinen kimmo.hamalai...@nokia.com Hi, Sorry, took some time, I was busy with some bug fixing... I started with the Home applet example and managed to whip up a small example (attached) that shows a transparent pop-up window. -Kimmo ___ maemo-developers mailing list maemo-developers@maemo.org https://lists.maemo.org/mailman/listinfo/maemo-developers
Re: How to get a transparent GtkWindow (fremantle)
I thought it was somewhat related to transparency because doing this:
gdk_window_reparent(win-window,gtk_widget_get_window(GTK_WIDGET
(mainwin)),300,200);
makes the HildonAppMenu work again at the price of loosing the transparency
effect (modified code attached).
--
Luca Donaggio
2009/11/10 Kimmo Hämäläinen kimmo.hamalai...@nokia.com
On Tue, 2009-11-10 at 14:12 +0100, ext Luca Donaggio wrote:
Hi Kimmo,
I'm sorry to bother you again, but the problem I'm facing is not how
to get a transparent window, but that if I create such a window the
HildonAppMenu of its parent HildonWindow doesn't show anymore.
I (slightly) modified your code to exemplify my situation.
Ah, yes, I can see it. Looks like the menu is unmapped immediately when
it is shown. It's weird, I'm not yet sure what unmaps it... Now it
looks like hildon-desktop is not unmapping it, so it could be widget
side problem also. I'll try to find out.
BTW. this problem is not related to the transparency: opaque window does
the same.
-Kimmo
Thanks for your time,
Luca Donaggio
2009/11/10 Kimmo Hämäläinen kimmo.hamalai...@nokia.com
Hi,
Sorry, took some time, I was busy with some bug fixing... I
started
with the Home applet example and managed to whip up a small
example
(attached) that shows a transparent pop-up window.
-Kimmo
/*
gcc -Wall `pkg-config gtk+-2.0 hildon-1 --cflags --libs` rgba-window-example-1.c -o rgba-window-example-1
*/
#include gtk/gtk.h
#include hildon/hildon.h
static gboolean
handle_expose (GtkWidget *widget, GdkEventExpose *event)
{
cairo_t *cr;
/* Create cairo context */
cr = gdk_cairo_create (GDK_DRAWABLE (widget-window));
gdk_cairo_region (cr, event-region);
cairo_clip (cr);
/* Draw alpha background */
cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
cairo_set_source_rgba (cr, 0.5, 0.5, 0.5, 0.5);
cairo_paint (cr);
/* Free context */
cairo_destroy (cr);
return FALSE;
}
int main ()
{
HildonProgram *prog;
HildonWindow *mainwin;
GtkWidget *win, *label1, *label2;
GdkScreen *screen;
HildonAppMenu *menu;
GtkWidget *button;
hildon_gtk_init (NULL, NULL);
prog = HILDON_PROGRAM (hildon_program_get_instance ());
mainwin = HILDON_WINDOW (hildon_window_new ());
hildon_program_add_window (prog, mainwin);
menu = HILDON_APP_MENU (hildon_app_menu_new ());
button = gtk_button_new_with_label (Quit);
g_signal_connect_after (button, clicked, G_CALLBACK (gtk_main_quit), NULL);
hildon_app_menu_append (menu, GTK_BUTTON (button));
gtk_widget_show_all (GTK_WIDGET (menu));
hildon_window_set_app_menu (mainwin, menu);
label2 = gtk_label_new (This is the main Hildon window\nThis is the main Hildon window\nThis is the main Hildon window\nThis is the main Hildon window);
gtk_container_add (GTK_CONTAINER (mainwin), label2);
gtk_widget_show_all (GTK_WIDGET (mainwin));
win = gtk_window_new (GTK_WINDOW_POPUP);
screen = gtk_widget_get_screen (win);
gtk_widget_set_colormap (win, gdk_screen_get_rgba_colormap (screen));
gtk_widget_set_app_paintable (win, TRUE);
gtk_widget_realize (win);
gdk_window_set_back_pixmap (win-window, NULL, FALSE);
gtk_window_set_transient_for (GTK_WINDOW (win), GTK_WINDOW (mainwin));
gtk_window_set_destroy_with_parent (GTK_WINDOW (win), TRUE);
gdk_window_reparent(win-window,gtk_widget_get_window(GTK_WIDGET (mainwin)),300,200);
gtk_window_move (GTK_WINDOW (win), 300, 200);
label1 = gtk_label_new (This is an RGBA window);
gtk_container_add (GTK_CONTAINER (win), label1);
gtk_widget_show_all (win);
g_signal_connect (win, expose-event, G_CALLBACK (handle_expose), win);
gtk_main ();
return 0;
}
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Re: How to get a transparent GtkWindow (fremantle)
On Tue, 2009-11-10 at 16:15 +0100, ext Luca Donaggio wrote: I thought it was somewhat related to transparency because doing this: gdk_window_reparent(win-window,gtk_widget_get_window(GTK_WIDGET (mainwin)),300,200); makes the HildonAppMenu work again at the price of loosing the transparency effect (modified code attached). Reparenting 'win-window' makes it a child of 'mainwin'. That is completely different ballgame than the original code, which keeps 'win- window' a top-level window (child of the root). When the window is not top-level, it's not managed by the window manager anymore, but it could also cause something in Gtk/Hildon (at least I have checked all places deleting windows in hildon-desktop to no avail). -Kimmo -- Luca Donaggio 2009/11/10 Kimmo Hämäläinen kimmo.hamalai...@nokia.com On Tue, 2009-11-10 at 14:12 +0100, ext Luca Donaggio wrote: Hi Kimmo, I'm sorry to bother you again, but the problem I'm facing is not how to get a transparent window, but that if I create such a window the HildonAppMenu of its parent HildonWindow doesn't show anymore. I (slightly) modified your code to exemplify my situation. Ah, yes, I can see it. Looks like the menu is unmapped immediately when it is shown. It's weird, I'm not yet sure what unmaps it... Now it looks like hildon-desktop is not unmapping it, so it could be widget side problem also. I'll try to find out. BTW. this problem is not related to the transparency: opaque window does the same. -Kimmo Thanks for your time, Luca Donaggio 2009/11/10 Kimmo Hämäläinen kimmo.hamalai...@nokia.com Hi, Sorry, took some time, I was busy with some bug fixing... I started with the Home applet example and managed to whip up a small example (attached) that shows a transparent pop-up window. -Kimmo ___ maemo-developers mailing list maemo-developers@maemo.org https://lists.maemo.org/mailman/listinfo/maemo-developers
Re: How to get a transparent GtkWindow (fremantle)
2009/11/3 Luca Donaggio donag...@gmail.com 2009/11/3 Kimmo Hämäläinen kimmo.hamalai...@nokia.com On Tue, 2009-11-03 at 15:06 +0100, ext Luca Donaggio wrote: I'm still banging my head against a wall with this: why without reparenting the popup undecorated window to the main app window it becomes transparent but the app menu doesn't work (it starts to be drawn but immediately disappears) and viceversa? I think this is not the way to go. This is way too hacky and ugly. Also, the window manager has not been tested for this kind of reparenting cases (which cause unmaps and remapping of windows), and it's likely that it's buggy in handling those. Home applet windows are transparent, so clearly there is some way to do it depending on the window type. Do you have a stand-alone program showing transparent dialog (without reparenting hacks), so I could spend some time to see if it can be made to work? -Kimmo Hi Kimmo, my project is pretty simple, you can have a look at its sources here: [1]. The relevant code is in interface.c (create_image_details) and callbacks.c (draw_image_details). I don't think either that reparenting should be the way to go (I think I've seen it done for the first time in some example, don't remember where now), I just found that with it the app menu did work and window's transparency didn't! [1] https://garage.maemo.org/plugins/scmsvn/viewcvs.php/trunk/src/?root=mrawviewer -- Luca Donaggio Sorry Kimmo, I forgot to update the svn repo, I'm doing it right now! -- Luca Donaggio ___ maemo-developers mailing list maemo-developers@maemo.org https://lists.maemo.org/mailman/listinfo/maemo-developers
Re: How to get a transparent GtkWindow (fremantle)
I'm still banging my head against a wall with this:
why without reparenting the popup undecorated window to the main app window
it becomes transparent but the app menu doesn't work (it starts to be drawn
but immediately disappears) and viceversa?
The final version of my function is this:
void create_image_details(GtkWidget *callerobj,app_data_t *myapp) {
GdkScreen *screen;
PangoLayout *textbuff;
cairo_t *cr;
gint offset, padding, txtwidth, txtheight;
offset = 20;
padding = 10;
/* For the widget itself let's use a GtkWindow */
if ((myapp-imgparamwin != NULL) GTK_IS_WINDOW(myapp-imgparamwin))
draw_image_details(myapp-imgparamwin,NULL,myapp);
else {
myapp-imgparamwin = gtk_window_new(GTK_WINDOW_POPUP);
gtk_window_set_decorated(GTK_WINDOW (myapp-imgparamwin),FALSE);
gtk_widget_set_app_paintable(myapp-imgparamwin,TRUE);
screen = gtk_widget_get_screen(myapp-imgparamwin);
gtk_widget_set_colormap(myapp-imgparamwin,gdk_screen_get_rgba_colormap(screen));
gtk_window_set_transient_for(GTK_WINDOW
(myapp-imgparamwin),GTK_WINDOW (myapp-mainwin));
gtk_window_set_destroy_with_parent(GTK_WINDOW
(myapp-imgparamwin),TRUE);
gtk_widget_realize(myapp-imgparamwin);
/* Get the Cairo context and the overall dimensions of the text to
be displayed */
cr = gdk_cairo_create(GDK_DRAWABLE (myapp-imgparamwin-window));
textbuff = pango_cairo_create_layout(cr);
pango_layout_set_markup(textbuff,myapp-imgparam,-1);
pango_layout_get_pixel_size(textbuff,txtwidth,txtheight);
cairo_destroy(cr);
g_object_unref(textbuff);
/* Show the widget */
gtk_widget_set_size_request(myapp-imgparamwin,txtwidth +
padding,txtheight + padding);
gtk_window_set_resizable(GTK_WINDOW (myapp-imgparamwin),FALSE);
gtk_window_set_accept_focus(GTK_WINDOW (myapp-imgparamwin),FALSE);
/*
gdk_window_set_override_redirect(myapp-imgparamwin-window,TRUE);
gdk_window_reparent(myapp-imgparamwin-window,gtk_widget_get_window(GTK_WIDGET
(myapp-mainwin)),offset,offset); */
gtk_window_move(GTK_WINDOW (myapp-imgparamwin),offset,offset);
gtk_widget_show(myapp-imgparamwin);
/* Actual drawing needs to take place when the widget is exposed */
g_signal_connect_after(myapp-imgparamwin,expose-event,
G_CALLBACK (draw_image_details),myapp);
}
}
--
Luca Donaggio
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Re: How to get a transparent GtkWindow (fremantle)
On Tue, 2009-11-03 at 15:06 +0100, ext Luca Donaggio wrote: I'm still banging my head against a wall with this: why without reparenting the popup undecorated window to the main app window it becomes transparent but the app menu doesn't work (it starts to be drawn but immediately disappears) and viceversa? I think this is not the way to go. This is way too hacky and ugly. Also, the window manager has not been tested for this kind of reparenting cases (which cause unmaps and remapping of windows), and it's likely that it's buggy in handling those. Home applet windows are transparent, so clearly there is some way to do it depending on the window type. Do you have a stand-alone program showing transparent dialog (without reparenting hacks), so I could spend some time to see if it can be made to work? -Kimmo ___ maemo-developers mailing list maemo-developers@maemo.org https://lists.maemo.org/mailman/listinfo/maemo-developers
Re: How to get a transparent GtkWindow (fremantle)
2009/11/3 Kimmo Hämäläinen kimmo.hamalai...@nokia.com On Tue, 2009-11-03 at 15:06 +0100, ext Luca Donaggio wrote: I'm still banging my head against a wall with this: why without reparenting the popup undecorated window to the main app window it becomes transparent but the app menu doesn't work (it starts to be drawn but immediately disappears) and viceversa? I think this is not the way to go. This is way too hacky and ugly. Also, the window manager has not been tested for this kind of reparenting cases (which cause unmaps and remapping of windows), and it's likely that it's buggy in handling those. Home applet windows are transparent, so clearly there is some way to do it depending on the window type. Do you have a stand-alone program showing transparent dialog (without reparenting hacks), so I could spend some time to see if it can be made to work? -Kimmo Hi Kimmo, my project is pretty simple, you can have a look at its sources here: [1]. The relevant code is in interface.c (create_image_details) and callbacks.c (draw_image_details). I don't think either that reparenting should be the way to go (I think I've seen it done for the first time in some example, don't remember where now), I just found that with it the app menu did work and window's transparency didn't! [1] https://garage.maemo.org/plugins/scmsvn/viewcvs.php/trunk/src/?root=mrawviewer -- Luca Donaggio ___ maemo-developers mailing list maemo-developers@maemo.org https://lists.maemo.org/mailman/listinfo/maemo-developers
Re: How to get a transparent GtkWindow (fremantle)
On Thu, 2009-10-29 at 17:29 +0100, ext Luca Donaggio wrote:
I'm trying to create a transparent, non-decorated popup GtkWindow on
top af my app HildonWindow and draw something on its underlying
GdkWindow object using cairo.
All I was able to obtain so far is a black (or whatever is the
background colour of the selected theme) rectangle -ie it's not
transparent and everything I paint in its GdkWindow with Cairo is not
showed at all.
You may hit (at least) this hard-coded limitation:
http://maemo.gitorious.org/fremantle-hildon-
desktop/libmatchbox2/blobs/master/matchbox/core/mb-wm-client.c#line173
Currently alpha in dialogs and application windows is ignored because it
allows for optimisations in the compositor. But if you set the override-
redirect flag for the window, that should go around that (because the
type of your window would be MBWMClientTypeOverride).
-Kimmo
Here is the code I'm using:
void create_image_details(GtkWidget *callerobj,app_data_t *myapp) {
PangoLayout *textbuff;
cairo_t *cr;
gint x0, y0, r, txtwidth, txtheight;
/* For the widget itself let's use a GtkWindow */
if ((myapp-imgparamwin != NULL) GTK_IS_WINDOW(myapp-
imgparamwin)) gtk_widget_destroy(myapp-imgparamwin);
myapp-imgparamwin = gtk_window_new(GTK_WINDOW_POPUP);
gtk_window_set_decorated(GTK_WINDOW (myapp-imgparamwin),FALSE);
gtk_window_set_opacity(GTK_WINDOW (myapp-imgparamwin),0);
gtk_widget_set_app_paintable(myapp-imgparamwin,TRUE);
gtk_widget_realize(myapp-imgparamwin);
/* gdk_window_set_back_pixmap(myapp-imgparamwin-
window,NULL,FALSE); */
/* Get the Cairo context */
cr = gdk_cairo_create(GDK_DRAWABLE (myapp-imgparamwin-window));
textbuff = pango_cairo_create_layout(cr);
pango_layout_set_markup(textbuff,myapp-imgparam,-1);
pango_layout_get_pixel_size(textbuff,txtwidth,txtheight);
/* Draw a rounded rectangle */
[cairo stuff is here]
cairo_destroy(cr);
g_object_unref(textbuff);
/* Show the widget */
gtk_window_resize(GTK_WINDOW (myapp-imgparamwin),txtwidth + (r *
2),txtheight + (r * 2));
gtk_window_move(GTK_WINDOW (myapp-imgparamwin),30,30);
gdk_window_reparent(myapp-imgparamwin-window,myapp-image-
window,30,30);
gtk_widget_show_all(myapp-imgparamwin);
}
The window dimension after the gtk_window_resize() are correct -ie the
dimension of the PangoLayout containing the text to be rendered, so
something is definitely going on under the hood... but nothing is
displayed!
If I add some widget to the popoup window (for example a GtkLabel with
some text in it), it's rendered correctly, but, of course it's not
transparent!
Any help, as always, is much appreciated!
Luca Donaggio
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Re: How to get a transparent GtkWindow (fremantle)
Thanks Conny and Kimmo,
here are my progresses:
I'm able to draw to the GtkWindow using Cairo only if I do it in a callback
attached to the expose event of the window itself, but I'm still getting no
transparency!
I'm sure this is the problem with the window manager that Kimmo pointed out,
but I don't know how to set the override-redirect flag apart from passing
the correct value inside a GdkWindowAttr struct when manually creating a
GdkWindow with gdk_window_new(), but I'm not doing this manually, so I'm
lost here!
Luca Donaggio
2009/10/30 Kimmo Hämäläinen kimmo.hamalai...@nokia.com
On Thu, 2009-10-29 at 17:29 +0100, ext Luca Donaggio wrote:
I'm trying to create a transparent, non-decorated popup GtkWindow on
top af my app HildonWindow and draw something on its underlying
GdkWindow object using cairo.
All I was able to obtain so far is a black (or whatever is the
background colour of the selected theme) rectangle -ie it's not
transparent and everything I paint in its GdkWindow with Cairo is not
showed at all.
You may hit (at least) this hard-coded limitation:
http://maemo.gitorious.org/fremantle-hildon-
desktop/libmatchbox2/blobs/master/matchbox/core/mb-wm-client.c#line173http://maemo.gitorious.org/fremantle-hildon-%0Adesktop/libmatchbox2/blobs/master/matchbox/core/mb-wm-client.c#line173
Currently alpha in dialogs and application windows is ignored because it
allows for optimisations in the compositor. But if you set the override-
redirect flag for the window, that should go around that (because the
type of your window would be MBWMClientTypeOverride).
-Kimmo
Here is the code I'm using:
void create_image_details(GtkWidget *callerobj,app_data_t *myapp) {
PangoLayout *textbuff;
cairo_t *cr;
gint x0, y0, r, txtwidth, txtheight;
/* For the widget itself let's use a GtkWindow */
if ((myapp-imgparamwin != NULL) GTK_IS_WINDOW(myapp-
imgparamwin)) gtk_widget_destroy(myapp-imgparamwin);
myapp-imgparamwin = gtk_window_new(GTK_WINDOW_POPUP);
gtk_window_set_decorated(GTK_WINDOW (myapp-imgparamwin),FALSE);
gtk_window_set_opacity(GTK_WINDOW (myapp-imgparamwin),0);
gtk_widget_set_app_paintable(myapp-imgparamwin,TRUE);
gtk_widget_realize(myapp-imgparamwin);
/* gdk_window_set_back_pixmap(myapp-imgparamwin-
window,NULL,FALSE); */
/* Get the Cairo context */
cr = gdk_cairo_create(GDK_DRAWABLE (myapp-imgparamwin-window));
textbuff = pango_cairo_create_layout(cr);
pango_layout_set_markup(textbuff,myapp-imgparam,-1);
pango_layout_get_pixel_size(textbuff,txtwidth,txtheight);
/* Draw a rounded rectangle */
[cairo stuff is here]
cairo_destroy(cr);
g_object_unref(textbuff);
/* Show the widget */
gtk_window_resize(GTK_WINDOW (myapp-imgparamwin),txtwidth + (r *
2),txtheight + (r * 2));
gtk_window_move(GTK_WINDOW (myapp-imgparamwin),30,30);
gdk_window_reparent(myapp-imgparamwin-window,myapp-image-
window,30,30);
gtk_widget_show_all(myapp-imgparamwin);
}
The window dimension after the gtk_window_resize() are correct -ie the
dimension of the PangoLayout containing the text to be rendered, so
something is definitely going on under the hood... but nothing is
displayed!
If I add some widget to the popoup window (for example a GtkLabel with
some text in it), it's rendered correctly, but, of course it's not
transparent!
Any help, as always, is much appreciated!
Luca Donaggio
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Re: How to get a transparent GtkWindow (fremantle)
Hi Luca,
have a look at this file:
https://garage.maemo.org/plugins/scmsvn/viewcvs.php/trunk/conboy/src/fullscreenmanager.c?revision=517root=conboyview=markup
The creation of the overlay window is done in fullscreen_ui_create() and
the cairo drawing on the window is in on_expose_event().
This code works. It creates a small semi-transparent window which is
shown over the main window. I first clear the surface, then I draw a
semi-transparent rectangle with a rounded upper-left corner and then I
add a pixmap with an alpha channel.
I think the most important parts are:
- Setting the color map of the window.
gtk_widget_set_colormap (widget, gdk_screen_get_rgba_colormap
(screen));
- Clearing the cairo surface.
cairo_set_operator (ctx, CAIRO_OPERATOR_CLEAR);
cairo_paint (ctx);
Hope that helps!
Conny
On Fri, 2009-10-30 at 14:36 +0100, Luca Donaggio wrote:
Thanks Conny and Kimmo,
here are my progresses:
I'm able to draw to the GtkWindow using Cairo only if I do it in a
callback attached to the expose event of the window itself, but I'm
still getting no transparency!
I'm sure this is the problem with the window manager that Kimmo
pointed out, but I don't know how to set the override-redirect flag
apart from passing the correct value inside a GdkWindowAttr struct
when manually creating a GdkWindow with gdk_window_new(), but I'm not
doing this manually, so I'm lost here!
Luca Donaggio
2009/10/30 Kimmo Hämäläinen kimmo.hamalai...@nokia.com
On Thu, 2009-10-29 at 17:29 +0100, ext Luca Donaggio wrote:
I'm trying to create a transparent, non-decorated popup
GtkWindow on
top af my app HildonWindow and draw something on its
underlying
GdkWindow object using cairo.
All I was able to obtain so far is a black (or whatever is
the
background colour of the selected theme) rectangle -ie it's
not
transparent and everything I paint in its GdkWindow with
Cairo is not
showed at all.
You may hit (at least) this hard-coded limitation:
http://maemo.gitorious.org/fremantle-hildon-
desktop/libmatchbox2/blobs/master/matchbox/core/mb-wm-client.c#line173
Currently alpha in dialogs and application windows is ignored
because it
allows for optimisations in the compositor. But if you set the
override-
redirect flag for the window, that should go around that
(because the
type of your window would be MBWMClientTypeOverride).
-Kimmo
Here is the code I'm using:
void create_image_details(GtkWidget *callerobj,app_data_t
*myapp) {
PangoLayout *textbuff;
cairo_t *cr;
gint x0, y0, r, txtwidth, txtheight;
/* For the widget itself let's use a GtkWindow */
if ((myapp-imgparamwin != NULL) GTK_IS_WINDOW(myapp-
imgparamwin)) gtk_widget_destroy(myapp-imgparamwin);
myapp-imgparamwin = gtk_window_new(GTK_WINDOW_POPUP);
gtk_window_set_decorated(GTK_WINDOW
(myapp-imgparamwin),FALSE);
gtk_window_set_opacity(GTK_WINDOW
(myapp-imgparamwin),0);
gtk_widget_set_app_paintable(myapp-imgparamwin,TRUE);
gtk_widget_realize(myapp-imgparamwin);
/* gdk_window_set_back_pixmap(myapp-imgparamwin-
window,NULL,FALSE); */
/* Get the Cairo context */
cr = gdk_cairo_create(GDK_DRAWABLE
(myapp-imgparamwin-window));
textbuff = pango_cairo_create_layout(cr);
pango_layout_set_markup(textbuff,myapp-imgparam,-1);
pango_layout_get_pixel_size(textbuff,txtwidth,txtheight);
/* Draw a rounded rectangle */
[cairo stuff is here]
cairo_destroy(cr);
g_object_unref(textbuff);
/* Show the widget */
gtk_window_resize(GTK_WINDOW
(myapp-imgparamwin),txtwidth + (r *
2),txtheight + (r * 2));
gtk_window_move(GTK_WINDOW (myapp-imgparamwin),30,30);
gdk_window_reparent(myapp-imgparamwin-window,myapp-image-
window,30,30);
gtk_widget_show_all(myapp-imgparamwin);
}
The window dimension after the gtk_window_resize() are
correct -ie the
dimension of the PangoLayout containing the text to be
rendered, so
something is definitely going on under the hood... but
nothing is
displayed!
If I add some widget to the popoup window (for example a
GtkLabel with
some text in it), it's rendered correctly, but, of course
it's not
transparent!
Any help, as always, is much
Re: How to get a transparent GtkWindow (fremantle)
On Fri, 2009-10-30 at 14:36 +0100, ext Luca Donaggio wrote:
Thanks Conny and Kimmo,
here are my progresses:
I'm able to draw to the GtkWindow using Cairo only if I do it in a
callback attached to the expose event of the window itself, but I'm
still getting no transparency!
I'm sure this is the problem with the window manager that Kimmo
pointed out, but I don't know how to set the override-redirect flag
apart from passing the correct value inside a GdkWindowAttr struct
when manually creating a GdkWindow with gdk_window_new(), but I'm not
doing this manually, so I'm lost here!
gdk_window_set_override_redirect () sets it. You need to set it after
realizing (gtk_widget_realize ()) your window but before showing it.
gtk_widget_get_window () returns GdkWindow of your widget.
-Kimmo
Luca Donaggio
2009/10/30 Kimmo Hämäläinen kimmo.hamalai...@nokia.com
On Thu, 2009-10-29 at 17:29 +0100, ext Luca Donaggio wrote:
I'm trying to create a transparent, non-decorated popup
GtkWindow on
top af my app HildonWindow and draw something on its
underlying
GdkWindow object using cairo.
All I was able to obtain so far is a black (or whatever is
the
background colour of the selected theme) rectangle -ie it's
not
transparent and everything I paint in its GdkWindow with
Cairo is not
showed at all.
You may hit (at least) this hard-coded limitation:
http://maemo.gitorious.org/fremantle-hildon-
desktop/libmatchbox2/blobs/master/matchbox/core/mb-wm-
client.c#line173
Currently alpha in dialogs and application windows is ignored
because it
allows for optimisations in the compositor. But if you set the
override-
redirect flag for the window, that should go around that
(because the
type of your window would be MBWMClientTypeOverride).
-Kimmo
Here is the code I'm using:
void create_image_details(GtkWidget *callerobj,app_data_t
*myapp) {
PangoLayout *textbuff;
cairo_t *cr;
gint x0, y0, r, txtwidth, txtheight;
/* For the widget itself let's use a GtkWindow */
if ((myapp-imgparamwin != NULL) GTK_IS_WINDOW(myapp-
imgparamwin)) gtk_widget_destroy(myapp-imgparamwin);
myapp-imgparamwin = gtk_window_new(GTK_WINDOW_POPUP);
gtk_window_set_decorated(GTK_WINDOW (myapp-
imgparamwin),FALSE);
gtk_window_set_opacity(GTK_WINDOW (myapp-
imgparamwin),0);
gtk_widget_set_app_paintable(myapp-imgparamwin,TRUE);
gtk_widget_realize(myapp-imgparamwin);
/* gdk_window_set_back_pixmap(myapp-imgparamwin-
window,NULL,FALSE); */
/* Get the Cairo context */
cr = gdk_cairo_create(GDK_DRAWABLE (myapp-imgparamwin-
window));
textbuff = pango_cairo_create_layout(cr);
pango_layout_set_markup(textbuff,myapp-imgparam,-1);
pango_layout_get_pixel_size
(textbuff,txtwidth,txtheight);
/* Draw a rounded rectangle */
[cairo stuff is here]
cairo_destroy(cr);
g_object_unref(textbuff);
/* Show the widget */
gtk_window_resize(GTK_WINDOW (myapp-
imgparamwin),txtwidth + (r *
2),txtheight + (r * 2));
gtk_window_move(GTK_WINDOW (myapp-imgparamwin),30,30);
gdk_window_reparent(myapp-imgparamwin-window,myapp-
image-
window,30,30);
gtk_widget_show_all(myapp-imgparamwin);
}
The window dimension after the gtk_window_resize() are
correct -ie the
dimension of the PangoLayout containing the text to be
rendered, so
something is definitely going on under the hood... but
nothing is
displayed!
If I add some widget to the popoup window (for example a
GtkLabel with
some text in it), it's rendered correctly, but, of course
it's not
transparent!
Any help, as always, is much appreciated!
Luca Donaggio
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Re: How to get a transparent GtkWindow (fremantle)
Thanks Kimmo, somehow I haven't seen it in the manual page!
But... I found it's not necessary: the thing which was preventing the
transparency effect to work as expected was this instruction:
gdk_window_reparent(myapp-imgparamwin-window,gtk_widget_get_window(GTK_WIDGET
(myapp-mainwin)),offset,offset);
Without it I can get the transparent background just as Conny suggested, BUT
... without it the HildonAppMenu stops working: it shows up and immediately
disappear!
Luca Donaggio
2009/10/30 Kimmo Hämäläinen kimmo.hamalai...@nokia.com
On Fri, 2009-10-30 at 14:36 +0100, ext Luca Donaggio wrote:
Thanks Conny and Kimmo,
here are my progresses:
I'm able to draw to the GtkWindow using Cairo only if I do it in a
callback attached to the expose event of the window itself, but I'm
still getting no transparency!
I'm sure this is the problem with the window manager that Kimmo
pointed out, but I don't know how to set the override-redirect flag
apart from passing the correct value inside a GdkWindowAttr struct
when manually creating a GdkWindow with gdk_window_new(), but I'm not
doing this manually, so I'm lost here!
gdk_window_set_override_redirect () sets it. You need to set it after
realizing (gtk_widget_realize ()) your window but before showing it.
gtk_widget_get_window () returns GdkWindow of your widget.
-Kimmo
Luca Donaggio
2009/10/30 Kimmo Hämäläinen kimmo.hamalai...@nokia.com
On Thu, 2009-10-29 at 17:29 +0100, ext Luca Donaggio wrote:
I'm trying to create a transparent, non-decorated popup
GtkWindow on
top af my app HildonWindow and draw something on its
underlying
GdkWindow object using cairo.
All I was able to obtain so far is a black (or whatever is
the
background colour of the selected theme) rectangle -ie it's
not
transparent and everything I paint in its GdkWindow with
Cairo is not
showed at all.
You may hit (at least) this hard-coded limitation:
http://maemo.gitorious.org/fremantle-hildon-
desktop/libmatchbox2/blobs/master/matchbox/core/mb-wm-
client.c#line173
Currently alpha in dialogs and application windows is ignored
because it
allows for optimisations in the compositor. But if you set the
override-
redirect flag for the window, that should go around that
(because the
type of your window would be MBWMClientTypeOverride).
-Kimmo
Here is the code I'm using:
void create_image_details(GtkWidget *callerobj,app_data_t
*myapp) {
PangoLayout *textbuff;
cairo_t *cr;
gint x0, y0, r, txtwidth, txtheight;
/* For the widget itself let's use a GtkWindow */
if ((myapp-imgparamwin != NULL) GTK_IS_WINDOW(myapp-
imgparamwin)) gtk_widget_destroy(myapp-imgparamwin);
myapp-imgparamwin = gtk_window_new(GTK_WINDOW_POPUP);
gtk_window_set_decorated(GTK_WINDOW (myapp-
imgparamwin),FALSE);
gtk_window_set_opacity(GTK_WINDOW (myapp-
imgparamwin),0);
gtk_widget_set_app_paintable(myapp-imgparamwin,TRUE);
gtk_widget_realize(myapp-imgparamwin);
/* gdk_window_set_back_pixmap(myapp-imgparamwin-
window,NULL,FALSE); */
/* Get the Cairo context */
cr = gdk_cairo_create(GDK_DRAWABLE (myapp-imgparamwin-
window));
textbuff = pango_cairo_create_layout(cr);
pango_layout_set_markup(textbuff,myapp-imgparam,-1);
pango_layout_get_pixel_size
(textbuff,txtwidth,txtheight);
/* Draw a rounded rectangle */
[cairo stuff is here]
cairo_destroy(cr);
g_object_unref(textbuff);
/* Show the widget */
gtk_window_resize(GTK_WINDOW (myapp-
imgparamwin),txtwidth + (r *
2),txtheight + (r * 2));
gtk_window_move(GTK_WINDOW (myapp-imgparamwin),30,30);
gdk_window_reparent(myapp-imgparamwin-window,myapp-
image-
window,30,30);
gtk_widget_show_all(myapp-imgparamwin);
}
The window dimension after the gtk_window_resize() are
correct -ie the
dimension of the PangoLayout containing the text to be
rendered, so
something is definitely going on under the hood... but
nothing is
displayed!
If I add some widget to the popoup window (for example a
GtkLabel with
some text in it), it's rendered correctly, but, of course
it's not
transparent!
Any help, as always, is
How to get a transparent GtkWindow (fremantle)
I'm trying to create a transparent, non-decorated popup GtkWindow on top af
my app HildonWindow and draw something on its underlying GdkWindow object
using cairo.
All I was able to obtain so far is a black (or whatever is the background
colour of the selected theme) rectangle -ie it's not transparent and
everything I paint in its GdkWindow with Cairo is not showed at all.
Here is the code I'm using:
void create_image_details(GtkWidget *callerobj,app_data_t *myapp) {
PangoLayout *textbuff;
cairo_t *cr;
gint x0, y0, r, txtwidth, txtheight;
/* For the widget itself let's use a GtkWindow */
if ((myapp-imgparamwin != NULL) GTK_IS_WINDOW(myapp-imgparamwin))
gtk_widget_destroy(myapp-imgparamwin);
myapp-imgparamwin = gtk_window_new(GTK_WINDOW_POPUP);
gtk_window_set_decorated(GTK_WINDOW (myapp-imgparamwin),FALSE);
gtk_window_set_opacity(GTK_WINDOW (myapp-imgparamwin),0);
gtk_widget_set_app_paintable(myapp-imgparamwin,TRUE);
gtk_widget_realize(myapp-imgparamwin);
/* gdk_window_set_back_pixmap(myapp-imgparamwin-window,NULL,FALSE); */
/* Get the Cairo context */
cr = gdk_cairo_create(GDK_DRAWABLE (myapp-imgparamwin-window));
textbuff = pango_cairo_create_layout(cr);
pango_layout_set_markup(textbuff,myapp-imgparam,-1);
pango_layout_get_pixel_size(textbuff,txtwidth,txtheight);
/* Draw a rounded rectangle */
[cairo stuff is here]
cairo_destroy(cr);
g_object_unref(textbuff);
/* Show the widget */
gtk_window_resize(GTK_WINDOW (myapp-imgparamwin),txtwidth + (r *
2),txtheight + (r * 2));
gtk_window_move(GTK_WINDOW (myapp-imgparamwin),30,30);
gdk_window_reparent(myapp-imgparamwin-window,myapp-image-window,30,30);
gtk_widget_show_all(myapp-imgparamwin);
}
The window dimension after the gtk_window_resize() are correct -ie the
dimension of the PangoLayout containing the text to be rendered, so
something is definitely going on under the hood... but nothing is displayed!
If I add some widget to the popoup window (for example a GtkLabel with some
text in it), it's rendered correctly, but, of course it's not transparent!
Any help, as always, is much appreciated!
Luca Donaggio
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Re: How to get a transparent GtkWindow (fremantle)
Hi Luca,
create a window like this and then use cairo to draw on it:
GtkWidget *overlay = gtk_window_new(GTK_WINDOW_POPUP);
gtk_window_set_decorated(GTK_WINDOW(overlay), FALSE);
gtk_widget_set_size_request(overlay, 100 100);
gtk_window_set_resizable(GTK_WINDOW(overlay), FALSE);
GdkScreen *screen = gtk_widget_get_screen (widget);
gtk_widget_set_colormap (widget, gdk_screen_get_rgba_colormap (screen));
gtk_widget_realize(overlay);
Cheers!
Conny
On Thu, 2009-10-29 at 17:29 +0100, Luca Donaggio wrote:
I'm trying to create a transparent, non-decorated popup GtkWindow on
top af my app HildonWindow and draw something on its underlying
GdkWindow object using cairo.
All I was able to obtain so far is a black (or whatever is the
background colour of the selected theme) rectangle -ie it's not
transparent and everything I paint in its GdkWindow with Cairo is not
showed at all.
Here is the code I'm using:
void create_image_details(GtkWidget *callerobj,app_data_t *myapp) {
PangoLayout *textbuff;
cairo_t *cr;
gint x0, y0, r, txtwidth, txtheight;
/* For the widget itself let's use a GtkWindow */
if ((myapp-imgparamwin != NULL)
GTK_IS_WINDOW(myapp-imgparamwin))
gtk_widget_destroy(myapp-imgparamwin);
myapp-imgparamwin = gtk_window_new(GTK_WINDOW_POPUP);
gtk_window_set_decorated(GTK_WINDOW (myapp-imgparamwin),FALSE);
gtk_window_set_opacity(GTK_WINDOW (myapp-imgparamwin),0);
gtk_widget_set_app_paintable(myapp-imgparamwin,TRUE);
gtk_widget_realize(myapp-imgparamwin);
/*
gdk_window_set_back_pixmap(myapp-imgparamwin-window,NULL,FALSE); */
/* Get the Cairo context */
cr = gdk_cairo_create(GDK_DRAWABLE (myapp-imgparamwin-window));
textbuff = pango_cairo_create_layout(cr);
pango_layout_set_markup(textbuff,myapp-imgparam,-1);
pango_layout_get_pixel_size(textbuff,txtwidth,txtheight);
/* Draw a rounded rectangle */
[cairo stuff is here]
cairo_destroy(cr);
g_object_unref(textbuff);
/* Show the widget */
gtk_window_resize(GTK_WINDOW (myapp-imgparamwin),txtwidth + (r *
2),txtheight + (r * 2));
gtk_window_move(GTK_WINDOW (myapp-imgparamwin),30,30);
gdk_window_reparent(myapp-imgparamwin-window,myapp-image-window,30,30);
gtk_widget_show_all(myapp-imgparamwin);
}
The window dimension after the gtk_window_resize() are correct -ie the
dimension of the PangoLayout containing the text to be rendered, so
something is definitely going on under the hood... but nothing is
displayed!
If I add some widget to the popoup window (for example a GtkLabel with
some text in it), it's rendered correctly, but, of course it's not
transparent!
Any help, as always, is much appreciated!
Luca Donaggio
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