make BarController::CenterOut mostly sorta-kinda work

git-svn-id: svn://localhost/ardour2/branches/3.0@8129 d708f5d6-7413-0410-9779-e7cbd77b26cf

diff --git a/libs/gtkmm2ext/barcontroller.cc b/libs/gtkmm2ext/barcontroller.cc
index 1b8c210fc97c5d9dda659f277d4ed18ad8ce6276..5c0d444be73578ac35a661074be7d1691865702d 100644 (file)
--- a/libs/gtkmm2ext/barcontroller.cc
+++ b/libs/gtkmm2ext/barcontroller.cc
@@ -248,12 +248,12 @@ BarController::mouse_control (double x, GdkWindow* window, double scaling)
        switch (_style) {
        case Line:
        case LeftToRight:
+        case CenterOut:
                fract = scaling * (delta / (darea.get_width() - 2));
                fract = min (1.0, fract);
                fract = max (-1.0, fract);
                adjustment.set_value (adjustment.get_value() + fract * (adjustment.get_upper() - adjustment.get_lower()));
                break;
-
        default:
                fract = 0.0;
        }
@@ -303,6 +303,22 @@ BarController::expose (GdkEventExpose* /*event*/)
                break;
 
        case CenterOut:
+               w = darea.get_width();
+               h = darea.get_height()-2;
+                if (use_parent) {
+                        parent = get_parent();
+                        if (parent) {
+                                win->draw_rectangle (parent->get_style()->get_fg_gc (parent->get_state()),
+                                                     true,
+                                                     0, 0, darea.get_width(), darea.get_height());
+                        } else {
+                                win->draw_rectangle (parent->get_style()->get_bg_gc (parent->get_state()),
+                                                     true,
+                                                     0, 0, darea.get_width(), darea.get_height());
+                        }
+                }
+                x1 = (w/2) - ((w*fract)/2); // center, back up half the bar width
+                win->draw_rectangle (get_style()->get_fg_gc (get_state()), true, x1, 1, w*fract, h);
                break;
 
        case LeftToRight: