Fix link colour for dark themes

Issue #7749.

gramps/gui/utils.py

@@ -544,6 +544,21 @@ def rgb_to_hex(rgb):
         rgbint = (int(rgb[0] * 255), int(rgb[1] * 255), int(rgb[2] * 255))
         return '#%02x%02x%02x' % rgbint
 
+def get_link_color(context):
+    """
+    Find the link color for the current theme.
+    """
+    from gi.repository import Gtk
+
+    if Gtk.get_minor_version() > 11:
+        col = context.get_color(Gtk.StateFlags.LINK)
+    else:
+        found, col = context.lookup_color('link_color')
+        if not found:
+            col.parse('blue')
+
+    return rgb_to_hex((col.red, col.green, col.blue))
+
 def edit_object(dbstate, uistate, reftype, ref):
     """
     Invokes the appropriate editor for an object type and given handle.

gramps/gui/widgets/grampletpane.py

@@ -48,7 +48,7 @@ from gramps.gen.errors import WindowActiveError
 from gramps.gen.const import URL_MANUAL_PAGE, VERSION_DIR, COLON
 from ..editors import EditPerson, EditFamily
 from ..managedwindow import ManagedWindow
-from ..utils import is_right_click, rgb_to_hex, get_primary_mask
+from ..utils import is_right_click, get_primary_mask, get_link_color
 from .menuitem import add_menuitem
 from ..plug import make_gui_option
 from ..plug.quick import run_quick_report_by_name
@@ -196,13 +196,8 @@ class LinkTag(Gtk.TextTag):
     lid = 0
     #obtaining the theme link color once. Restart needed on theme change!
     linkcolor = Gtk.Label(label='test') #needed to avoid label destroyed to early
-    linkcolor = linkcolor.get_style_context().lookup_color('link_color')
-    if linkcolor[0]:
-        linkcolor = rgb_to_hex((linkcolor[1].red, linkcolor[1].green,
-                                linkcolor[1].blue))
-    else:
-        linkcolor = 'blue'
-
+    linkcolor = get_link_color(linkcolor.get_style_context())
+    
     def __init__(self, buffer):
         LinkTag.lid += 1
         Gtk.TextTag.__init__(self, name=str(LinkTag.lid))

gramps/gui/widgets/labels.py

@@ -48,7 +48,7 @@ from gi.repository import Pango
 #
 #-------------------------------------------------------------------------
 from gramps.gen.constfunc import has_display, win
-from ..utils import rgb_to_hex
+from ..utils import get_link_color
 
 #-------------------------------------------------------------------------
 #
@@ -81,11 +81,7 @@ class LinkLabel(Gtk.EventBox):
         Gtk.EventBox.__init__(self)
 
         st_cont = self.get_style_context()
-        col = st_cont.lookup_color('link_color')
-        if col[0]:
-            self.color = rgb_to_hex((col[1].red, col[1].green, col[1].blue))
-        else:
-            self.color = 'blue'
+        self.color = get_link_color(st_cont)
 
         if emph:
             #emphasize a link

gramps/gui/widgets/styledtexteditor.py

@@ -60,7 +60,7 @@ from .toolcomboentry import ToolComboEntry
 from .springseparator import SpringSeparatorAction
 from ..spell import Spell
 from ..display import display_url
-from ..utils import SystemFonts, rgb_to_hex, get_primary_mask
+from ..utils import SystemFonts, get_primary_mask, get_link_color
 from gramps.gen.config import config
 from gramps.gen.constfunc import has_display
 from ..actiongroup import ActionGroup
@@ -186,11 +186,7 @@ class StyledTextEditor(Gtk.TextView):
         self.set_buffer(self.textbuffer)
 
         st_cont = self.get_style_context()
-        col = st_cont.lookup_color('link_color')
-        if col[0]:
-            self.linkcolor = rgb_to_hex((col[1].red, col[1].green, col[1].blue))
-        else:
-            self.linkcolor = 'blue'
+        self.linkcolor = get_link_color(st_cont)
         self.textbuffer.linkcolor = self.linkcolor
 
         self.match = None