[gtk+] Add some overlay scrollbar theming to Adwaita

[Matthias Clasen <matthiasc src gnome org>]

commit 47ce01116b81bfa81a503d3b7cf24881d2b134f7
Author: Matthias Clasen <mclasen redhat com>
Date:   Wed Oct 8 23:37:29 2014 -0400

    Add some overlay scrollbar theming to Adwaita

 gtk/resources/theme/Adwaita/_common.scss           |   22 ++++++++++++++++++++
 gtk/resources/theme/Adwaita/gtk-contained-dark.css |   17 +++++++++++++++
 gtk/resources/theme/Adwaita/gtk-contained.css      |   17 +++++++++++++++
 3 files changed, 56 insertions(+), 0 deletions(-)
---
diff --git a/gtk/resources/theme/Adwaita/_common.scss b/gtk/resources/theme/Adwaita/_common.scss
index c285190..564521e 100644
--- a/gtk/resources/theme/Adwaita/_common.scss
+++ b/gtk/resources/theme/Adwaita/_common.scss
@@ -3022,3 +3022,25 @@ GtkVolumeButton.button { padding: 8px; }
 .monospace {
   font: Monospace;
 }
+
+/* Overlay scrollbars */
+
+.scrollbar.overlay-indicator.dragging,
+.scrollbar.overlay-indicator.hovering {
+  -GtkRange-slider-width: 15;
+}
+
+.scrollbar.overlay-indicator.dragging.trough,
+.scrollbar.overlay-indicator.hovering.trough {
+  background-color: transparentize(black, 0.9);
+}
+
+.sidebar .scrollbar.overlay-indicator,
+.scrollbar.overlay-indicator {
+  -GtkRange-slider-width: 10;
+}
+
+.sidebar .scrollbar.overlay-indicator .trough,
+.scrollbar.overlay-indicator.trough {
+  background-color: transparent;
+}
diff --git a/gtk/resources/theme/Adwaita/gtk-contained-dark.css 
b/gtk/resources/theme/Adwaita/gtk-contained-dark.css
index e531953..6348c60 100644
--- a/gtk/resources/theme/Adwaita/gtk-contained-dark.css
+++ b/gtk/resources/theme/Adwaita/gtk-contained-dark.css
@@ -4372,6 +4372,23 @@ GtkCalendar.header .menuitem.titlebutton.button:selected, .list-row:selected {
 .monospace {
   font: Monospace; }
 
+/* Overlay scrollbars */
+.scrollbar.overlay-indicator.dragging,
+.scrollbar.overlay-indicator.hovering {
+  -GtkRange-slider-width: 15; }
+
+.scrollbar.overlay-indicator.dragging.trough,
+.scrollbar.overlay-indicator.hovering.trough {
+  background-color: rgba(0, 0, 0, 0.1); }
+
+.sidebar .scrollbar.overlay-indicator,
+.scrollbar.overlay-indicator {
+  -GtkRange-slider-width: 10; }
+
+.sidebar .scrollbar.overlay-indicator .trough,
+.scrollbar.overlay-indicator.trough {
+  background-color: transparent; }
+
 /* GTK NAMED COLORS
    ----------------
    use responsibly! */
diff --git a/gtk/resources/theme/Adwaita/gtk-contained.css b/gtk/resources/theme/Adwaita/gtk-contained.css
index 7766b1d..9545fe5 100644
--- a/gtk/resources/theme/Adwaita/gtk-contained.css
+++ b/gtk/resources/theme/Adwaita/gtk-contained.css
@@ -4534,6 +4534,23 @@ GtkCalendar.header .menuitem.titlebutton.button:selected, .list-row:selected {
 .monospace {
   font: Monospace; }
 
+/* Overlay scrollbars */
+.scrollbar.overlay-indicator.dragging,
+.scrollbar.overlay-indicator.hovering {
+  -GtkRange-slider-width: 15; }
+
+.scrollbar.overlay-indicator.dragging.trough,
+.scrollbar.overlay-indicator.hovering.trough {
+  background-color: rgba(0, 0, 0, 0.1); }
+
+.sidebar .scrollbar.overlay-indicator,
+.scrollbar.overlay-indicator {
+  -GtkRange-slider-width: 10; }
+
+.sidebar .scrollbar.overlay-indicator .trough,
+.scrollbar.overlay-indicator.trough {
+  background-color: transparent; }
+
 /* GTK NAMED COLORS
    ----------------
    use responsibly! */