question about GIO and GVolumeMonitor
Hello,
I am playing about with GTK and GIO and I am trying to list the first
volume, mount and drive. My code is as follows:
*#include
#include
#include
#include
#include
int main(int argc, char** argv) {
GVolumeMonitor * monitor;
GList * drives;
GList * mounts;
GList * volumes;
char * mount_name;
char * drive_name;
char * volume_name;
gtk_init(&argc, &argv);
monitor = g_volume_monitor_get();
drives =
g_volume_monitor_get_connected_drives(G_VOLUME_MONITOR(monitor));
mounts = g_volume_monitor_get_mounts(G_VOLUME_MONITOR(monitor));
volumes = g_volume_monitor_get_volumes(G_VOLUME_MONITOR(monitor));
GVolume * volume = (GVolume *) volumes->data;
GDrive * drive = (GDrive *) drives->data;
GMount * mount = (GMount *) mounts->data;
volume_name = g_volume_get_name(volume);
drive_name = g_drive_get_name(drive);
mount_name = g_mount_get_name(mount);
g_print("%s\n", volume_name);
g_free(mount_name);
g_free(drive_name);
g_free(volume_name);
gtk_main();
return (EXIT_SUCCESS);
}*
I get a segmentation fault as if it was indicating that there were no volume
nor any mount on my machine... (note that I don't get this problem with the
drive.)
Can anyone help?
Thanks,
Julien.
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Re: transparent cairo rendering
2009/6/18 Paul Davis : > On Thu, Jun 18, 2009 at 11:30 AM, Jose > Hevia wrote: >> Hi, I have been fighting for a long time with a very simple program I >> can't make work the way it should. >> >> The question is: >> >> Is that a bug or is it my fault? > > why are there calls to gtk_widget_show() from your expose handler? > :-) Because I didn't know how to make it working, and gtk_widget_show could send a sign to update the widget. It doesn't work without it either. As you can see, I used a rectangle too, in theory that is not necessary, for the same reason, and disable the clipping mask too with cairo_reset_clip, and set cairo_set_operator (cr, CAIRO_OPERATOR_OVER) that is the default( theorically ). I could make it work if I redraw manually(by a function copying pixels) the surface, but this is not the way it should work, if cairo uses hardware acceleration, I lost it. here: http://cairographics.org/operators/#clipmask it says that source puts the alpha value and the color, this is not what is doing. Seems like a bug to me. Thanks for your help. ___ gtk-list mailing list gtk-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-list
Re: transparent cairo rendering
Seems to me that when I say: Draw me a rectangle that is (0,0,0(black),0(and transparent)... he says oh, is transparent, so I don't need to paint it, But the problem appears if there was something out there (not transparent) and want to make it transparent, you can't, unless you make a function to make it pixel by pixel. That would explain why it works the first renderings and can't paint over something already painted, although destroyed and recreated. ___ gtk-list mailing list gtk-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-list
beginner needs help with "casting" with gtk
Hello,
I have the following callback function:
*static void hello(GtkWidget *widget, gpointer data) {
gchar * _data = (gchar *) data;
g_print(_data);
g_print("\n");
}*
wich I call as follows:
*
g_signal_connect(G_OBJECT(button), "clicked", G_CALLBACK(hello), "hello
toto");*
I get the following warning each time I compile:
*warning: the format is not a litteral string and no format argument*
Can anyone please help?
I need to "cast" the data variable to gchar *. What am I doing wrong?
Thanks in advance,
Julien.
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Re: Injecting input inside a gtk program?
On Thu, Jun 18, 2009 at 5:46 PM, Dan Kegel wrote: > How does one inject keystrokes in a gtk program? http://mail.gnome.org/archives/gtk-app-devel-list/2004-July/msg00016.html shows how to do it with gdk_keymap_get_entries_for_keyval() and gtk_main_do_event(). (Presumably if you want to send input to a specific window you would call that window's methods instead, but that doesn't work if you want the keystrokes to be processed via IME's, etc.) ___ gtk-list mailing list gtk-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-list
Re: Injecting input inside a gtk program?
On Mon, Jun 22, 2009 at 7:32 AM, Dan Kegel wrote: > On Thu, Jun 18, 2009 at 5:46 PM, Dan Kegel wrote: >> How does one inject keystrokes in a gtk program? > > http://mail.gnome.org/archives/gtk-app-devel-list/2004-July/msg00016.html > shows how to do it with > gdk_keymap_get_entries_for_keyval() and gtk_main_do_event(). but don't forget to read the followup, http://mail.gnome.org/archives/gtk-app-devel-list/2004-July/msg00036.html ___ gtk-list mailing list gtk-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-list
gtk.TreeModel.iter_children() method, how often should it be called?
Hi -- I think I have a problem but I'm not sure since I'm relatively new to the TreeModel and how it works. Here's the scenario: I use TreeModel to display rows of data from a database. Upon startup, the TreeModel is built and I notice two calls to the gtk.TreeModel.iter_children() method. Later, I change some data in one of the rows. The next time the TreeModel is built, gtk.TreeModel.iter_children() is called thousands of times before the display is refreshed. Oh, the database has less than 50 rows of data in it! So, two questions: 1. Is this normal (I hope not!) behavior? 2. What tells the TreeModel to stop calling gtk.TreeModel.iter_children()? How does the TM know that it has done everything it needs to do before displaying the tree? -- Gerald Britton ___ gtk-list mailing list gtk-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-list
Implementing zoom and pan on pygtk
hello
I am new to pygtk but familiar with python. I am trying to build a
simple gui that allows zooming and panning (using arrows in 4
directions) of images(maps) in png and svg formats. However I
can't get the zooming an panning to work. Could someone offer
help on this. I really need it fast so that I can start so real work
using images. I already tried to use scrolling to implement the
panning but I couldn't make it.
I show the images like this
im = gtk.Image()
im.set_from_file("something.png")
.
.
win.show_all
so far I have this
I have buttons eg for zoomout;
self.z_out = gtk.Button(stock=gtk.STOCK_ZOOM_OUT)
self.z_in.connect("clicked", self.zoomin, width, height)
then I have this function
def zoomout(self, widget, width, height):
w, h = hzoomout(width, height)
im = self.image
pixbuf = gtk.gdk.pixbuf_new_from_file("bremen.png")
scaled_buf =
pixbuf.scale_simple(w,h,gtk.gdk.INTERP_BILINEAR)
im.set_from_pixbuf(scaled_buf)
im.show()
hzoomout is just a small function that computes the new height
and width based on some scale
Thanks in advance
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Re: Implementing zoom and pan on pygtk
On Mon, 2009-06-22 at 20:13 +0200, Billy Okal wrote: > I am trying to build a simple gui that allows zooming and panning > (using arrows in 4 directions) of images(maps) in png and svg formats. If you want a map widget, why not reuse a pre-existing one such as libchamplain (which has Python bindings)? Pierre-Luc signature.asc Description: This is a digitally signed message part ___ gtk-list mailing list gtk-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-list
implementing zoom and pan in pygtk
hello
I am new to pygtk but familiar with python. I am trying to build a
simple gui that allows zooming and panning (using arrows in 4
directions) of images(maps) in png and svg formats. However I
can't get the zooming an panning to work. Could someone offer
help on this. I really need it fast so that I can start so real work
using images. I already tried to use scrolling to implement the
panning but I couldn't make it.
I show the images like this
im = gtk.Image()
im.set_from_file("something.png")
.
.
win.show_all
so far I have this
I have buttons eg for zoomout;
self.z_out = gtk.Button(stock=gtk.STOCK_ZOOM_OUT)
self.z_in.connect("clicked", self.zoomin, width, height)
then I have this function
def zoomout(self, widget, width, height):
w, h = hzoomout(width, height)
im = self.image
pixbuf = gtk.gdk.pixbuf_new_from_file("bremen.png")
scaled_buf =
pixbuf.scale_simple(w,h,gtk.gdk.INTERP_BILINEAR)
im.set_from_pixbuf(scaled_buf)
im.show()
hzoomout is just a small function that computes the new height
and width based on some scale
Thanks in advance
--
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Re: gtk.TreeModel.iter_children() method, how often should it be called?
Hi. > 1. Is this normal (I hope not!) behavior? I'm not sure about 1000, but calling this function a lot is normal if you make major changes to your model while attached to GtkTreeView. > 2. What tells the TreeModel to stop calling > gtk.TreeModel.iter_children()? How does the TM know that it has done > everything it needs to do before displaying the tree? Try detaching model from tree view before doing any major change. Sample code would look something like this (in C): CODE --- model = gtk_tree_view_get_model( GTK_TREE_VIEW( tree ) ); g_object_ref( G_OBJECT( model ) ); gtk_tree_view_set_model( GTK_TREE_VIEW( tree ), NULL ); /* Make changes */ gtk_tree_view_set_model( GTK_TREE_VIEW( tree ), model ); g_object_unref( G_OBJECT( model ) ); /CODE - Hope this helps. -- Tadej Borovšak tadeboro.blogspot.com tadeb...@gmail.com tadej.borov...@gmail.com ___ gtk-list mailing list gtk-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-list
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