How can I create a GtkImage from a GIcon witha a fallback?
I have a Gio.Icon (or GIcon in C, I'm using pygobject). Right now I'm using the following code to create a Gtk.Image from the Gio.Icon:
image = icon and Gtk.Image(gicon=icon, icon_size=Gtk.IconSize.DIALOG, pixel_size=48, use_fallback=True)
The problem is, that the Gio.Icon isn't garanteed to have a valid icon name/path and when it doesn't it shows a broken image icon. I would like to fall back to using a different icon I know exists if the supplied Gio.Icon is invalid. Is there some way to know if the Gio.Icon is invalid, or if the Gtk.Image would show as a broken image?
EDIT
A minimal example:
import gi
gi.require_version('Gtk', '3.0')
from gi.repository import Gtk, Gio
win = Gtk.Window()
win.connect('destroy', Gtk.main_quit)
icon = Gio.Icon.new_for_string('gnome-garbage')
fallback_icon = Gio.Icon.new_for_string('folder')
image = Gtk.Image(gicon=icon, icon_size=Gtk.IconSize.DIALOG, pixel_size=48)
win.add(image)
win.show_all()
Gtk.main()
gtk gtk3 pygobject
asked Nov 23 '18 at 5:04
Thayne
3,71212245
add a comment |
I have a Gio.Icon (or GIcon in C, I'm using pygobject). Right now I'm using the following code to create a Gtk.Image from the Gio.Icon:
image = icon and Gtk.Image(gicon=icon, icon_size=Gtk.IconSize.DIALOG, pixel_size=48, use_fallback=True)
The problem is, that the Gio.Icon isn't garanteed to have a valid icon name/path and when it doesn't it shows a broken image icon. I would like to fall back to using a different icon I know exists if the supplied Gio.Icon is invalid. Is there some way to know if the Gio.Icon is invalid, or if the Gtk.Image would show as a broken image?
EDIT
A minimal example:
import gi
gi.require_version('Gtk', '3.0')
from gi.repository import Gtk, Gio
win = Gtk.Window()
win.connect('destroy', Gtk.main_quit)
icon = Gio.Icon.new_for_string('gnome-garbage')
fallback_icon = Gio.Icon.new_for_string('folder')
image = Gtk.Image(gicon=icon, icon_size=Gtk.IconSize.DIALOG, pixel_size=48)
win.add(image)
win.show_all()
Gtk.main()
gtk gtk3 pygobject
asked Nov 23 '18 at 5:04
Thayne
3,71212245
Try to load an invalid icon and check if that raises an exception. If that's the case, catch it and put your fallback code.
– liberforce
Nov 23 '18 at 10:42
docs.quantifiedcode.com/python-anti-patterns/readability/…
– liberforce
Nov 23 '18 at 10:43
It doesn't throw an exception, it just shows a broken image.
– Thayne
Nov 23 '18 at 18:35
Even withuse_fallback=False? Adding an MVCE would help too.
– liberforce
Nov 26 '18 at 16:21
From the GtkImage documentation: 'If the file isn’t loaded successfully, the image will contain a “broken image” icon similar to that used in many web browsers.' And origionally I had use_fallback as False, and had the same problem. use_fallback just tells it split the icon name by hyphens and try to find a shorter name for which an icon does exist.
– Thayne
Nov 27 '18 at 6:37
add a comment |
I have a Gio.Icon (or GIcon in C, I'm using pygobject). Right now I'm using the following code to create a Gtk.Image from the Gio.Icon:
image = icon and Gtk.Image(gicon=icon, icon_size=Gtk.IconSize.DIALOG, pixel_size=48, use_fallback=True)
The problem is, that the Gio.Icon isn't garanteed to have a valid icon name/path and when it doesn't it shows a broken image icon. I would like to fall back to using a different icon I know exists if the supplied Gio.Icon is invalid. Is there some way to know if the Gio.Icon is invalid, or if the Gtk.Image would show as a broken image?
EDIT
A minimal example:
import gi
gi.require_version('Gtk', '3.0')
from gi.repository import Gtk, Gio
win = Gtk.Window()
win.connect('destroy', Gtk.main_quit)
icon = Gio.Icon.new_for_string('gnome-garbage')
fallback_icon = Gio.Icon.new_for_string('folder')
image = Gtk.Image(gicon=icon, icon_size=Gtk.IconSize.DIALOG, pixel_size=48)
win.add(image)
win.show_all()
Gtk.main()
gtk gtk3 pygobject
asked Nov 23 '18 at 5:04
Thayne
3,71212245
I have a Gio.Icon (or GIcon in C, I'm using pygobject). Right now I'm using the following code to create a Gtk.Image from the Gio.Icon:
image = icon and Gtk.Image(gicon=icon, icon_size=Gtk.IconSize.DIALOG, pixel_size=48, use_fallback=True)
The problem is, that the Gio.Icon isn't garanteed to have a valid icon name/path and when it doesn't it shows a broken image icon. I would like to fall back to using a different icon I know exists if the supplied Gio.Icon is invalid. Is there some way to know if the Gio.Icon is invalid, or if the Gtk.Image would show as a broken image?
EDIT
A minimal example:
import gi
gi.require_version('Gtk', '3.0')
from gi.repository import Gtk, Gio
win = Gtk.Window()
win.connect('destroy', Gtk.main_quit)
icon = Gio.Icon.new_for_string('gnome-garbage')
fallback_icon = Gio.Icon.new_for_string('folder')
image = Gtk.Image(gicon=icon, icon_size=Gtk.IconSize.DIALOG, pixel_size=48)
win.add(image)
win.show_all()
Gtk.main()
gtk gtk3 pygobject
gtk gtk3 pygobject
asked Nov 23 '18 at 5:04
Thayne
3,71212245
asked Nov 23 '18 at 5:04
Thayne
3,71212245
edited Nov 27 '18 at 6:54
asked Nov 23 '18 at 5:04
Thayne
3,71212245
asked Nov 23 '18 at 5:04
Thayne
3,71212245
asked Nov 23 '18 at 5:04
Thayne
3,71212245
3,71212245
Try to load an invalid icon and check if that raises an exception. If that's the case, catch it and put your fallback code.
– liberforce
Nov 23 '18 at 10:42
docs.quantifiedcode.com/python-anti-patterns/readability/…
– liberforce
Nov 23 '18 at 10:43
It doesn't throw an exception, it just shows a broken image.
– Thayne
Nov 23 '18 at 18:35
Even withuse_fallback=False? Adding an MVCE would help too.
– liberforce
Nov 26 '18 at 16:21
From the GtkImage documentation: 'If the file isn’t loaded successfully, the image will contain a “broken image” icon similar to that used in many web browsers.' And origionally I had use_fallback as False, and had the same problem. use_fallback just tells it split the icon name by hyphens and try to find a shorter name for which an icon does exist.
– Thayne
Nov 27 '18 at 6:37
add a comment |
Try to load an invalid icon and check if that raises an exception. If that's the case, catch it and put your fallback code.
– liberforce
Nov 23 '18 at 10:42
docs.quantifiedcode.com/python-anti-patterns/readability/…
– liberforce
Nov 23 '18 at 10:43
It doesn't throw an exception, it just shows a broken image.
– Thayne
Nov 23 '18 at 18:35
Even withuse_fallback=False? Adding an MVCE would help too.
– liberforce
Nov 26 '18 at 16:21
From the GtkImage documentation: 'If the file isn’t loaded successfully, the image will contain a “broken image” icon similar to that used in many web browsers.' And origionally I had use_fallback as False, and had the same problem. use_fallback just tells it split the icon name by hyphens and try to find a shorter name for which an icon does exist.
– Thayne
Nov 27 '18 at 6:37
Try to load an invalid icon and check if that raises an exception. If that's the case, catch it and put your fallback code.
– liberforce
Nov 23 '18 at 10:42
Try to load an invalid icon and check if that raises an exception. If that's the case, catch it and put your fallback code.
– liberforce
Nov 23 '18 at 10:42
docs.quantifiedcode.com/python-anti-patterns/readability/…
– liberforce
Nov 23 '18 at 10:43
docs.quantifiedcode.com/python-anti-patterns/readability/…
– liberforce
Nov 23 '18 at 10:43
It doesn't throw an exception, it just shows a broken image.
– Thayne
Nov 23 '18 at 18:35
It doesn't throw an exception, it just shows a broken image.
– Thayne
Nov 23 '18 at 18:35
Even with
use_fallback=False? Adding an MVCE would help too.– liberforce
Nov 26 '18 at 16:21
Even with
use_fallback=False? Adding an MVCE would help too.– liberforce
Nov 26 '18 at 16:21
From the GtkImage documentation: 'If the file isn’t loaded successfully, the image will contain a “broken image” icon similar to that used in many web browsers.' And origionally I had use_fallback as False, and had the same problem. use_fallback just tells it split the icon name by hyphens and try to find a shorter name for which an icon does exist.
– Thayne
Nov 27 '18 at 6:37
From the GtkImage documentation: 'If the file isn’t loaded successfully, the image will contain a “broken image” icon similar to that used in many web browsers.' And origionally I had use_fallback as False, and had the same problem. use_fallback just tells it split the icon name by hyphens and try to find a shorter name for which an icon does exist.
– Thayne
Nov 27 '18 at 6:37
add a comment |
1 Answer
1
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I found an answer in the GtkImage documentation:
If the file isn’t loaded successfully, the image will contain a “broken image” icon similar to that used in many web browsers. If you want to handle errors in loading the file yourself, for example by displaying an error message, then load the image with gdk_pixbuf_new_from_file(), then create the GtkImage with gtk_image_new_from_pixbuf().
Although, in my case I actually need to use a GtkIconTheme to get a PixBuf instead of gdk_pixbuf_new_from_file:
import gi
gi.require_version('Gtk', '3.0')
from gi.repository import Gtk, Gio
win = Gtk.Window()
win.connect('destroy', Gtk.main_quit)
def load_icon(icon):
info = Gtk.IconTheme.get_default().lookup_by_gicon(icon, 48, Gtk.IconLookupFlags.FORCE_SIZE)
if info:
return info.load_icon()
icon = Gio.Icon.new_for_string('gnome-garbage')
fallback_icon = Gio.Icon.new_for_string('folder')
pixbuf = load_icon(icon) or load_icon(fallback_icon)
image = Gtk.Image.new_from_pixbuf(pixbuf)
win.add(image)
win.show_all()
Gtk.main()
answered Nov 27 '18 at 7:47
Thayne
3,71212245
add a comment |
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1 Answer
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1 Answer
1
active
oldest
votes
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oldest
votes
active
oldest
votes
I found an answer in the GtkImage documentation:
If the file isn’t loaded successfully, the image will contain a “broken image” icon similar to that used in many web browsers. If you want to handle errors in loading the file yourself, for example by displaying an error message, then load the image with gdk_pixbuf_new_from_file(), then create the GtkImage with gtk_image_new_from_pixbuf().
Although, in my case I actually need to use a GtkIconTheme to get a PixBuf instead of gdk_pixbuf_new_from_file:
import gi
gi.require_version('Gtk', '3.0')
from gi.repository import Gtk, Gio
win = Gtk.Window()
win.connect('destroy', Gtk.main_quit)
def load_icon(icon):
info = Gtk.IconTheme.get_default().lookup_by_gicon(icon, 48, Gtk.IconLookupFlags.FORCE_SIZE)
if info:
return info.load_icon()
icon = Gio.Icon.new_for_string('gnome-garbage')
fallback_icon = Gio.Icon.new_for_string('folder')
pixbuf = load_icon(icon) or load_icon(fallback_icon)
image = Gtk.Image.new_from_pixbuf(pixbuf)
win.add(image)
win.show_all()
Gtk.main()
answered Nov 27 '18 at 7:47
Thayne
3,71212245
add a comment |
I found an answer in the GtkImage documentation:
If the file isn’t loaded successfully, the image will contain a “broken image” icon similar to that used in many web browsers. If you want to handle errors in loading the file yourself, for example by displaying an error message, then load the image with gdk_pixbuf_new_from_file(), then create the GtkImage with gtk_image_new_from_pixbuf().
Although, in my case I actually need to use a GtkIconTheme to get a PixBuf instead of gdk_pixbuf_new_from_file:
import gi
gi.require_version('Gtk', '3.0')
from gi.repository import Gtk, Gio
win = Gtk.Window()
win.connect('destroy', Gtk.main_quit)
def load_icon(icon):
info = Gtk.IconTheme.get_default().lookup_by_gicon(icon, 48, Gtk.IconLookupFlags.FORCE_SIZE)
if info:
return info.load_icon()
icon = Gio.Icon.new_for_string('gnome-garbage')
fallback_icon = Gio.Icon.new_for_string('folder')
pixbuf = load_icon(icon) or load_icon(fallback_icon)
image = Gtk.Image.new_from_pixbuf(pixbuf)
win.add(image)
win.show_all()
Gtk.main()
answered Nov 27 '18 at 7:47
Thayne
3,71212245
add a comment |
I found an answer in the GtkImage documentation:
If the file isn’t loaded successfully, the image will contain a “broken image” icon similar to that used in many web browsers. If you want to handle errors in loading the file yourself, for example by displaying an error message, then load the image with gdk_pixbuf_new_from_file(), then create the GtkImage with gtk_image_new_from_pixbuf().
Although, in my case I actually need to use a GtkIconTheme to get a PixBuf instead of gdk_pixbuf_new_from_file:
import gi
gi.require_version('Gtk', '3.0')
from gi.repository import Gtk, Gio
win = Gtk.Window()
win.connect('destroy', Gtk.main_quit)
def load_icon(icon):
info = Gtk.IconTheme.get_default().lookup_by_gicon(icon, 48, Gtk.IconLookupFlags.FORCE_SIZE)
if info:
return info.load_icon()
icon = Gio.Icon.new_for_string('gnome-garbage')
fallback_icon = Gio.Icon.new_for_string('folder')
pixbuf = load_icon(icon) or load_icon(fallback_icon)
image = Gtk.Image.new_from_pixbuf(pixbuf)
win.add(image)
win.show_all()
Gtk.main()
answered Nov 27 '18 at 7:47
Thayne
3,71212245
I found an answer in the GtkImage documentation:
If the file isn’t loaded successfully, the image will contain a “broken image” icon similar to that used in many web browsers. If you want to handle errors in loading the file yourself, for example by displaying an error message, then load the image with gdk_pixbuf_new_from_file(), then create the GtkImage with gtk_image_new_from_pixbuf().
Although, in my case I actually need to use a GtkIconTheme to get a PixBuf instead of gdk_pixbuf_new_from_file:
import gi
gi.require_version('Gtk', '3.0')
from gi.repository import Gtk, Gio
win = Gtk.Window()
win.connect('destroy', Gtk.main_quit)
def load_icon(icon):
info = Gtk.IconTheme.get_default().lookup_by_gicon(icon, 48, Gtk.IconLookupFlags.FORCE_SIZE)
if info:
return info.load_icon()
icon = Gio.Icon.new_for_string('gnome-garbage')
fallback_icon = Gio.Icon.new_for_string('folder')
pixbuf = load_icon(icon) or load_icon(fallback_icon)
image = Gtk.Image.new_from_pixbuf(pixbuf)
win.add(image)
win.show_all()
Gtk.main()
answered Nov 27 '18 at 7:47
Thayne
3,71212245
answered Nov 27 '18 at 7:47
Thayne
3,71212245
answered Nov 27 '18 at 7:47
Thayne
3,71212245
answered Nov 27 '18 at 7:47
Thayne
3,71212245
3,71212245
add a comment |
add a comment |
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Try to load an invalid icon and check if that raises an exception. If that's the case, catch it and put your fallback code.
– liberforce
Nov 23 '18 at 10:42
docs.quantifiedcode.com/python-anti-patterns/readability/…
– liberforce
Nov 23 '18 at 10:43
It doesn't throw an exception, it just shows a broken image.
– Thayne
Nov 23 '18 at 18:35
Even with
use_fallback=False? Adding an MVCE would help too.– liberforce
Nov 26 '18 at 16:21
From the GtkImage documentation: 'If the file isn’t loaded successfully, the image will contain a “broken image” icon similar to that used in many web browsers.' And origionally I had use_fallback as False, and had the same problem. use_fallback just tells it split the icon name by hyphens and try to find a shorter name for which an icon does exist.
– Thayne
Nov 27 '18 at 6:37