Switch video preview widget background color to use stylesheet and palette. To prevent a freeze on Windows.

Author: jonoomph

src/themes/cosmic/theme.py

@@ -442,7 +442,7 @@ def __init__(self, app):
     background-color: #FABE0A;
 }
 
-.video_widget {
+QWidget#videoPreview {
     background-color: #141923;
 }
         """

src/themes/humanity/theme.py

@@ -51,7 +51,7 @@ def __init__(self, app):
     background-color: #ff0024;
 }
 
-.video_widget {
+QWidget#videoPreview {
     background-color: #191919;
 }
         """
@@ -94,7 +94,7 @@ def __init__(self, app):
     background-color: #ff0024;
 }
 
-.video_widget {
+QWidget#videoPreview {
     background-color: #dedede;
 }
         """

src/windows/video_widget.py

@@ -330,17 +330,7 @@ def paintEvent(self, event, *args):
             True)
 
         # Get theme colors (if any)
-        # if get_app().theme_manager:
-        #     theme = get_app().theme_manager.get_current_theme()
-        #     if not theme:
-        #         log.warning("No theme loaded yet. Skip rendering video preview widget.")
-        #         return
-        #     background_color = theme.get_color(".video_widget", "background-color")
-        #     painter.fillRect(event.rect(), background_color)
-        # else:
-        #     log.warning("No ThemeManager loaded yet. Skip rendering video preview widget.")
-
-        background_color = QColor("#191919")
+        background_color = self.palette().color(self.backgroundRole())
         painter.fillRect(event.rect(), background_color)
 
         # Find centered viewport