def on_mouse_drag(self, x, y, dx, dy, *etc):
if not self.callback:
return
if not self.dragging:
self.handle.hilite()
self.dragging = x, self.handle.position
ui.start_drag(self)
orig_x, orig_pos = self.dragging
pos = orig_pos + (x - orig_x) / self.handle.range
self.callback(max(0, min(1, pos)))
return True
def on_mouse_drag(self, x, y, dx, dy, btn, *etc):
if not self.dragging:
self.scrolling = (btn == mouse.LEFT) and self.zoom_rect
self.zooming = (btn == mouse.RIGHT)
self.dragging = x, y
ui.start_drag(self)
if self.scrolling:
ratio = self.get_zoom_ratio()
orig_x, orig_y = self.dragging
new_x = max(self.world_rect.left,
min(self.world_rect.right - self.rect.width * ratio,
self.scrolling.left - (x - orig_x) * ratio))
new_y = max(self.world_rect.bottom,
min(self.world_rect.top - self.rect.height * ratio,
self.scrolling.bottom - (y - orig_y) * ratio))
self.zoom_rect = ui.rect(new_x,
new_y,
self.zoom_rect.width,
self.zoom_rect.height)
if self.zooming:
self.drag_end = x, y
return True
