1 files changed, 104 insertions, 0 deletions
diff --git a/gtk2_ardour/panner.cc b/gtk2_ardour/panner.cc
new file mode 100644
index 0000000000..bb9b432184
--- /dev/null
+++ b/gtk2_ardour/panner.cc
@@ -0,0 +1,104 @@
+#include <iostream>
+
+#include "panner.h"
+
+using namespace std;
+
+static const int triangle_size = 5;
+
+static void
+null_label_callback (char* buf, unsigned int bufsize)
+{
+	/* no label */
+
+	buf[0] = '\0';
+}
+
+
+PannerBar::PannerBar (Gtk::Adjustment& adj, PBD::Controllable& c)
+	: BarController (adj, c, sigc::ptr_fun (null_label_callback))
+{
+	set_style (BarController::Line);
+}
+
+PannerBar::~PannerBar ()
+{
+}
+
+bool
+PannerBar::expose (GdkEventExpose* ev)
+{
+	Glib::RefPtr<Gdk::Window> win (darea.get_window());
+	Glib::RefPtr<Gdk::GC> gc (get_style()->get_base_gc (get_state()));
+
+	BarController::expose (ev);
+
+	/* now draw triangles for left, right and center */
+
+	GdkPoint points[3];
+
+	// left
+	
+	points[0].x = 0;
+	points[0].y = 0;
+
+	points[1].x = triangle_size;
+	points[1].y = 0;
+	
+	points[2].x = 0;
+	points[2].y = triangle_size;
+
+	gdk_draw_polygon (win->gobj(), gc->gobj(), true, points, 3);
+
+	// center
+
+	points[0].x = (darea.get_width()/2 - triangle_size);
+	points[0].y = 0;
+
+	points[1].x = (darea.get_width()/2 + triangle_size) - 1;
+	points[1].y = 0;
+	
+	points[2].x = darea.get_width()/2 - 1;
+	points[2].y = triangle_size - 1;
+
+	gdk_draw_polygon (win->gobj(), gc->gobj(), true, points, 3); 
+
+	// right
+
+	points[0].x = (darea.get_width() - triangle_size) - 1;
+	points[0].y = 0;
+
+	points[1].x = darea.get_width() - 1;
+	points[1].y = 0;
+	
+	points[2].x = darea.get_width() - 1;
+	points[2].y = triangle_size;
+
+	gdk_draw_polygon (win->gobj(), gc->gobj(), true, points, 3);
+
+	return true;
+}
+
+bool
+PannerBar::button_press (GdkEventButton* ev)
+{
+	if (ev->button == 1 && ev->type == GDK_BUTTON_PRESS && ev->y < 10) {
+		if (ev->x < triangle_size) {
+			adjustment.set_value (adjustment.get_lower());
+		} else if (ev->x > (darea.get_width() - triangle_size)) {
+			adjustment.set_value (adjustment.get_upper());
+		} else if (ev->x > (darea.get_width()/2 - triangle_size) &&
+			   ev->x < (darea.get_width()/2 + triangle_size)) {
+			adjustment.set_value (adjustment.get_lower() + ((adjustment.get_upper() - adjustment.get_lower()) / 2.0));
+		}
+	}
+
+	return BarController::button_press (ev);
+}
+
+bool
+PannerBar::button_release (GdkEventButton* ev)
+{
+	return BarController::button_release (ev);
+}
+