Use symbolic icons for buttons in GTK toolbar.

QuLogic · QuLogic · commit 82877b76e18d · 2020-05-30T17:34:54.000-04:00
Unfortunately, the only way to trigger this is to rename the files, so
add some symlinks to the existing SVG. Switching from PNG to SVG should
be scalable as well.
diff --git a/lib/matplotlib/backends/backend_gtk3.py b/lib/matplotlib/backends/backend_gtk3.py
@@ -27,7 +27,7 @@
     # auto-backend selection logic correctly skips.
     raise ImportError from e
 
-from gi.repository import GLib, GObject, Gtk, Gdk
+from gi.repository import Gio, GLib, GObject, Gtk, Gdk
 
 
 _log = logging.getLogger(__name__)
@@ -464,9 +464,11 @@ def __init__(self, canvas, window):
             if text is None:
                 self.insert(Gtk.SeparatorToolItem(), -1)
                 continue
-            image = Gtk.Image()
-            image.set_from_file(
-                str(cbook._get_data_path('images', image_file + '.png')))
+            image = Gtk.Image.new_from_gicon(
+                Gio.Icon.new_for_string(
+                    str(cbook._get_data_path('images',
+                                             f'{image_file}-symbolic.svg'))),
+                Gtk.IconSize.LARGE_TOOLBAR)
             self._gtk_ids[text] = tbutton = (
                 Gtk.ToggleToolButton() if callback in ['zoom', 'pan'] else
                 Gtk.ToolButton())
@@ -623,7 +625,7 @@ def set_history_buttons(self):
 
 
 class ToolbarGTK3(ToolContainerBase, Gtk.Box):
-    _icon_extension = '.png'
+    _icon_extension = '-symbolic.svg'
 
     def __init__(self, toolmanager):
         ToolContainerBase.__init__(self, toolmanager)
@@ -644,8 +646,9 @@ def add_toolitem(self, name, group, position, image_file, description,
         tbutton.set_label(name)
 
         if image_file is not None:
-            image = Gtk.Image()
-            image.set_from_file(image_file)
+            image = Gtk.Image.new_from_gicon(
+                Gio.Icon.new_for_string(image_file),
+                Gtk.IconSize.LARGE_TOOLBAR)
             tbutton.set_icon_widget(image)
 
         if position is None:
diff --git a/lib/matplotlib/mpl-data/images/back-symbolic.svg b/lib/matplotlib/mpl-data/images/back-symbolic.svg
@@ -0,0 +1 @@
+back.svg
diff --git a/lib/matplotlib/mpl-data/images/filesave-symbolic.svg b/lib/matplotlib/mpl-data/images/filesave-symbolic.svg
@@ -0,0 +1 @@
+filesave.svg
diff --git a/lib/matplotlib/mpl-data/images/forward-symbolic.svg b/lib/matplotlib/mpl-data/images/forward-symbolic.svg
@@ -0,0 +1 @@
+forward.svg
diff --git a/lib/matplotlib/mpl-data/images/help-symbolic.svg b/lib/matplotlib/mpl-data/images/help-symbolic.svg
@@ -0,0 +1 @@
+help.svg
diff --git a/lib/matplotlib/mpl-data/images/home-symbolic.svg b/lib/matplotlib/mpl-data/images/home-symbolic.svg
@@ -0,0 +1 @@
+home.svg
diff --git a/lib/matplotlib/mpl-data/images/move-symbolic.svg b/lib/matplotlib/mpl-data/images/move-symbolic.svg
@@ -0,0 +1 @@
+move.svg
diff --git a/lib/matplotlib/mpl-data/images/subplots-symbolic.svg b/lib/matplotlib/mpl-data/images/subplots-symbolic.svg
@@ -0,0 +1 @@
+subplots.svg
diff --git a/lib/matplotlib/mpl-data/images/zoom_to_rect-symbolic.svg b/lib/matplotlib/mpl-data/images/zoom_to_rect-symbolic.svg
@@ -0,0 +1 @@
+zoom_to_rect.svg
