Enhanced scrollbars movement.

The scrollbars now follow high speed mouse movement.

albow/palette_view.py

@@ -155,9 +155,9 @@ def mouse_drag(self, event):
             s = float(d) / n
             if abs(self.scroll_rel) >= s:
                 if self.scroll_rel > 0:
-                    self.scroll_down()
+                    self.scroll_down(delta=int(abs(self.scroll_rel) / s))
                 else:
-                    self.scroll_up()
+                    self.scroll_up(delta=int(abs(self.scroll_rel) / s))
                 self.scroll_rel = 0
 
     def mouse_up(self, event):
@@ -166,13 +166,13 @@ def mouse_up(self, event):
                 self.dragging_hover = False
                 self.scroll_rel = 0
 
-    def scroll_up(self):
+    def scroll_up(self, delta=1):
         if self.can_scroll_up():
-            self.scroll -= 1
+            self.scroll -= delta
 
-    def scroll_down(self):
+    def scroll_down(self, delta=1):
         if self.can_scroll_down():
-            self.scroll += 1
+            self.scroll += delta
 
     def scroll_to_item(self, n):
         i = max(0, min(n, self.num_items() - 1))

albow/scrollpanel.py

@@ -151,6 +151,8 @@ def hscrollbar_rect(self):
         r = Rect(left, slt, w, self.scroll_button_size)
         r.right = min(r.right, d + slr)
         r.inflate_ip(-4, -4)
+        if r.w < 1:
+            r.w = int(w)
         return r
 
     def can_scroll_left(self):
@@ -202,13 +204,13 @@ def draw(self, surface):
         if l or r:
             self.draw_hscrollbar(surface)
 
-    def scroll_left(self):
+    def scroll_left(self, delta=1):
         if self.can_scroll_left():
-            self.hscroll -= self.cell_size[1]
+            self.hscroll -= self.cell_size[1] * delta
 
-    def scroll_right(self):
+    def scroll_right(self, delta=1):
         if self.can_scroll_right():
-            self.hscroll += self.cell_size[1]
+            self.hscroll += self.cell_size[1] * delta
 
     def mouse_down(self, event):
         if event.button == 1:
@@ -241,9 +243,9 @@ def mouse_drag(self, event):
             s = float(d) / n
             if abs(self.hscroll_rel) > s:
                 if self.hscroll_rel > 0:
-                    self.scroll_right()
+                    self.scroll_right(delta=int(abs(self.hscroll_rel) / s))
                 else:
-                    self.scroll_left()
+                    self.scroll_left(delta=int(abs(self.hscroll_rel) / s))
                 self.hscroll_rel = 0
         PaletteView.mouse_drag(self, event)