Use an action's tooltip in the key editor if its label is empty; add some tooltips...

[ardour.git] / libs / gtkmm2ext / scroomer.cc

diff --git a/libs/gtkmm2ext/scroomer.cc b/libs/gtkmm2ext/scroomer.cc
index 07e5b464528e3f9a1a8c4759b77e7811482c7185..40892301bcab79e27527f9e148019b6d5562b1e5 100644 (file)
--- a/libs/gtkmm2ext/scroomer.cc
+++ b/libs/gtkmm2ext/scroomer.cc
@@ -103,17 +103,33 @@ Scroomer::on_motion_notify_event (GdkEventMotion* ev)
                unzoomed_val = max(unzoomed_val, adj.get_lower());
                break;
        case Handle1:
+
                unzoomed_page += scale * fract * range;
                unzoomed_page = min(unzoomed_page, adj.get_upper() - unzoomed_val);
                unzoomed_page = max(unzoomed_page, min_page_size);
+               
+               if (pinch){
+                       temp = unzoomed_val + unzoomed_page;
+                       unzoomed_val -= scale * fract * range * 0.5;
+                       unzoomed_val = min(unzoomed_val, temp - min_page_size);
+                       unzoomed_val = max(unzoomed_val, adj.get_lower());
+               }
+               
                break;
        case Handle2:
                temp = unzoomed_val + unzoomed_page;
                unzoomed_val += scale * fract * range;
                unzoomed_val = min(unzoomed_val, temp - min_page_size);
                unzoomed_val = max(unzoomed_val, adj.get_lower());
-
+               
                unzoomed_page = temp - unzoomed_val;
+               
+               if (pinch){
+                       
+                       unzoomed_page -= scale * fract * range;
+               }
+               
+               unzoomed_page = min(unzoomed_page, adj.get_upper() - unzoomed_val);             
                unzoomed_page = max(unzoomed_page, min_page_size);
                break;
        default:
@@ -178,28 +194,18 @@ Scroomer::on_motion_notify_event (GdkEventMotion* ev)
                val = unzoomed_val;
                page = unzoomed_page;
        }
-
+       
        adj.set_page_size(page);
+       adj.set_value(val);
+       adj.value_changed();
        
-       if (val == adj.get_value()) {
-               adj.value_changed();
-       }
-
-       if (val < adj.get_lower()) {
-               adj.value_changed();
-       } else if (val > adj.get_upper()) {
-               adj.value_changed();
-       } else {
-               adj.set_value(val);
-       }
-
        return true;
 }
 
 bool
 Scroomer::on_button_press_event (GdkEventButton* ev)
 {
-       if (ev->button == 1) {
+       if (ev->button == 1 || ev->button == 3) {
                Component comp = point_in(ev->y);
 
                if (comp == Total || comp == None) {
@@ -212,7 +218,14 @@ Scroomer::on_button_press_event (GdkEventButton* ev)
                unzoomed_val = adj.get_value();
                unzoomed_page = adj.get_page_size();
                grab_window = ev->window;
+               
+               if (ev->button == 3){
+                       pinch = true;
+               } else {
+                        pinch = false;
+                }
        }
+       
        return false;
 }
 
@@ -229,7 +242,7 @@ Scroomer::on_button_release_event (GdkEventButton* ev)
                return true;
        }
 
-       if (ev->button != 1) {
+       if (ev->button != 1 && ev->button != 3) {
                return true;
        }