def _do_zoom(self, new_index_factor, new_value_factor):
if self.zoom_to_mouse:
location = self.position
x_map = self._get_x_mapper()
y_map = self._get_y_mapper()
cx = (x_map.range.high + x_map.range.low)/2
if self._index_factor == new_index_factor:
nextx = cx
else:
x = x_map.map_data(location[0])
nextx = x + (cx - x)*(self._index_factor/new_index_factor)
cy = (y_map.range.high + y_map.range.low)/2
if self._value_factor == new_value_factor:
nexty = cy
else:
y = y_map.map_data(location[1])
nexty = y + (cy - y)*(self._value_factor/new_value_factor)
pan_state = PanState((cx, cy), (nextx, nexty))
zoom_state = ZoomState((self._index_factor, self._value_factor),
(new_index_factor, new_value_factor))
states = GroupedToolState([pan_state, zoom_state])
states.apply(self)
self._append_state(states)
else:
zoom_state = ZoomState((self._index_factor, self._value_factor),
(new_index_factor, new_value_factor))
zoom_state.apply(self)
self._append_state(zoom_state)
def _do_zoom(self, new_index_factor, new_value_factor):
if self.zoom_to_mouse:
location = self.position
x_map = self._get_x_mapper()
y_map = self._get_y_mapper()
cx = (x_map.range.high + x_map.range.low) / 2
if self._index_factor == new_index_factor:
nextx = cx
else:
x = x_map.map_data(location[0])
nextx = x + (cx - x) * (self._index_factor / new_index_factor)
cy = (y_map.range.high + y_map.range.low) / 2
if self._value_factor == new_value_factor:
nexty = cy
else:
y = y_map.map_data(location[1])
nexty = y + (cy - y) * (self._value_factor / new_value_factor)
pan_state = PanState((cx, cy), (nextx, nexty))
zoom_state = ZoomState((self._index_factor, self._value_factor),
(new_index_factor, new_value_factor))
states = GroupedToolState([pan_state, zoom_state])
states.apply(self)
self._append_state(states)
else:
zoom_state = ZoomState((self._index_factor, self._value_factor),
(new_index_factor, new_value_factor))
zoom_state.apply(self)
self._append_state(zoom_state)
def zoom_in(self, factor=0):
if factor == 0:
factor = self.zoom_factor
new_index_factor = self._index_factor * factor
new_value_factor = self._value_factor * factor
if self.axis == 'value':
new_index_factor = self._index_factor
elif self.axis == 'index':
new_value_factor = self._value_factor
if self.component.orientation == 'h':
if self._zoom_limit_reached(new_index_factor, 'x'):
return
if self._zoom_limit_reached(new_value_factor, 'y'):
return
else:
if self._zoom_limit_reached(new_index_factor, 'y'):
return
if self._zoom_limit_reached(new_value_factor, 'x'):
return
if self.zoom_to_mouse:
location = self.position
x_map = self._get_x_mapper()
y_map = self._get_y_mapper()
next = (x_map.map_data(location[0]),
y_map.map_data(location[1]))
prev = (x_map.map_data(self.component.bounds[0]/2),
y_map.map_data(self.component.bounds[1]/2))
pan_state = PanState(prev, next)
zoom_state = ZoomState((self._index_factor, self._value_factor),
(new_index_factor, new_value_factor))
states = GroupedToolState([pan_state, zoom_state])
states.apply(self)
self._append_state(states)
else:
zoom_state = ZoomState((self._index_factor, self._value_factor),
(new_index_factor, new_value_factor))
zoom_state.apply(self)
self._append_state(zoom_state)
def zoom_in(self, factor=0):
if factor == 0:
factor = self.zoom_factor
new_index_factor = self._index_factor * factor
new_value_factor = self._value_factor * factor
if self.axis == 'value':
new_index_factor = self._index_factor
elif self.axis == 'index':
new_value_factor = self._value_factor
if self.component.orientation == 'h':
if self._zoom_limit_reached(new_index_factor, 'x'):
return
if self._zoom_limit_reached(new_value_factor, 'y'):
return
else:
if self._zoom_limit_reached(new_index_factor, 'y'):
return
if self._zoom_limit_reached(new_value_factor, 'x'):
return
if self.zoom_to_mouse:
location = self.position
x_map = self._get_x_mapper()
y_map = self._get_y_mapper()
next = (x_map.map_data(location[0]), y_map.map_data(location[1]))
prev = (x_map.map_data(self.component.bounds[0] / 2),
y_map.map_data(self.component.bounds[1] / 2))
pan_state = PanState(prev, next)
zoom_state = ZoomState((self._index_factor, self._value_factor),
(new_index_factor, new_value_factor))
states = GroupedToolState([pan_state, zoom_state])
states.apply(self)
self._append_state(states)
else:
zoom_state = ZoomState((self._index_factor, self._value_factor),
(new_index_factor, new_value_factor))
zoom_state.apply(self)
self._append_state(zoom_state)