def _update_zoom(self):
np0x, np0y = self.general_zoom_x_0.value(), self.general_zoom_y_0.value()
np1x, np1y = self.general_zoom_x_1.value(), self.general_zoom_y_1.value()
if np0x > np1x:
np1x = np0x
if np0y > np1y:
np1y = np0y
self._controller.apply_action(SetZoom(Zoom.from_coords(np0x, np0y, np1x, np1y)))
def _perform_drag(self):
current_model = self.controller.get_model()
delta_x = int(np.round(self._start_x) - np.round(self._end_x))
delta_y = int(np.round(self._start_y) - np.round(self._end_y))
config = current_model.get_config()
data_info = current_model.get_data()
current_zoom = current_model.get_config().zoom
max_y = data_info.get_max_y_index(config.dimension,
rotate=config.rotate,
map_names=config.maps_to_show)
max_x = data_info.get_max_x_index(config.dimension,
rotate=config.rotate,
map_names=config.maps_to_show)
new_x0 = current_zoom.p0.x + delta_x
new_x1 = (current_zoom.p1.x or max_x) + delta_x
new_y0 = current_zoom.p0.y + delta_y
new_y1 = (current_zoom.p1.y or max_y) + delta_y
if new_x0 < 0:
new_x1 -= new_x0
new_x0 = 0
if new_x1 > max_x:
new_x0 -= new_x1
new_x1 = max_x
if new_y0 < 0:
new_y1 -= new_y0
new_y0 = 0
if new_y1 > max_y:
new_y0 -= new_y1
new_y1 = max_y
try:
new_zoom = Zoom.from_coords(new_x0, new_y0, new_x1, new_y1)
except ValueError:
new_zoom = current_zoom
self.controller.apply_action(SetZoom(new_zoom))
self._start_x = self._end_x
self._start_y = self._end_y
def _perform_scroll(self):
current_model = self.controller.get_model()
config = current_model.get_config()
data_info = current_model.get_data()
current_zoom = config.zoom
max_y = data_info.get_max_y_index(config.dimension,
rotate=config.rotate,
map_names=config.maps_to_show)
max_x = data_info.get_max_x_index(config.dimension,
rotate=config.rotate,
map_names=config.maps_to_show)
scrolling = self._scrolls
if abs(self._scrolls) > 1:
scrolling *= 3
new_x0 = current_zoom.p0.x + scrolling
if new_x0 < 0:
new_x0 = 0
new_y0 = current_zoom.p0.y + scrolling
if new_y0 < 0:
new_y0 = 0
new_x1 = (current_zoom.p1.x or max_x) - scrolling
if new_x1 > max_x:
new_x1 = max_x
new_y1 = (current_zoom.p1.y or max_y) - scrolling
if new_y1 > max_y:
new_y1 = max_y
try:
new_zoom = Zoom.from_coords(new_x0, new_y0, new_x1, new_y1)
except ValueError:
new_zoom = current_zoom
self.controller.apply_action(SetZoom(new_zoom))
self._scrolls = 0