forked from 170010011/fr
107 lines
3.1 KiB
Python
107 lines
3.1 KiB
Python
|
|
|
|
class BlitManager(object):
|
|
|
|
"""Object that manages blits on an axes"""
|
|
|
|
def __init__(self, ax):
|
|
self.ax = ax
|
|
self.canvas = ax.figure.canvas
|
|
self.canvas.mpl_connect('draw_event', self.on_draw_event)
|
|
self.ax = ax
|
|
self.background = None
|
|
self.artists = []
|
|
|
|
def add_artists(self, artists):
|
|
self.artists.extend(artists)
|
|
self.redraw()
|
|
|
|
def remove_artists(self, artists):
|
|
for artist in artists:
|
|
self.artists.remove(artist)
|
|
|
|
def on_draw_event(self, event=None):
|
|
self.background = self.canvas.copy_from_bbox(self.ax.bbox)
|
|
self.draw_artists()
|
|
|
|
def redraw(self):
|
|
if self.background is not None:
|
|
self.canvas.restore_region(self.background)
|
|
self.draw_artists()
|
|
self.canvas.blit(self.ax.bbox)
|
|
else:
|
|
self.canvas.draw_idle()
|
|
|
|
def draw_artists(self):
|
|
for artist in self.artists:
|
|
self.ax.draw_artist(artist)
|
|
|
|
|
|
class EventManager(object):
|
|
|
|
"""Object that manages events on a canvas"""
|
|
|
|
def __init__(self, ax):
|
|
self.canvas = ax.figure.canvas
|
|
self.connect_event('button_press_event', self.on_mouse_press)
|
|
self.connect_event('key_press_event', self.on_key_press)
|
|
self.connect_event('button_release_event', self.on_mouse_release)
|
|
self.connect_event('motion_notify_event', self.on_move)
|
|
self.connect_event('scroll_event', self.on_scroll)
|
|
|
|
self.tools = []
|
|
self.active_tool = None
|
|
|
|
def connect_event(self, name, handler):
|
|
self.canvas.mpl_connect(name, handler)
|
|
|
|
def attach(self, tool):
|
|
self.tools.append(tool)
|
|
self.active_tool = tool
|
|
|
|
def detach(self, tool):
|
|
self.tools.remove(tool)
|
|
if self.tools:
|
|
self.active_tool = self.tools[-1]
|
|
else:
|
|
self.active_tool = None
|
|
|
|
def on_mouse_press(self, event):
|
|
for tool in self.tools:
|
|
if not tool.ignore(event) and tool.hit_test(event):
|
|
self.active_tool = tool
|
|
break
|
|
if self.active_tool and not self.active_tool.ignore(event):
|
|
self.active_tool.on_mouse_press(event)
|
|
return
|
|
for tool in reversed(self.tools):
|
|
if not tool.ignore(event):
|
|
self.active_tool = tool
|
|
tool.on_mouse_press(event)
|
|
return
|
|
|
|
def on_key_press(self, event):
|
|
tool = self._get_tool(event)
|
|
if tool is not None:
|
|
tool.on_key_press(event)
|
|
|
|
def _get_tool(self, event):
|
|
if not self.tools or self.active_tool.ignore(event):
|
|
return None
|
|
return self.active_tool
|
|
|
|
def on_mouse_release(self, event):
|
|
tool = self._get_tool(event)
|
|
if tool is not None:
|
|
tool.on_mouse_release(event)
|
|
|
|
def on_move(self, event):
|
|
tool = self._get_tool(event)
|
|
if tool is not None:
|
|
tool.on_move(event)
|
|
|
|
def on_scroll(self, event):
|
|
tool = self._get_tool(event)
|
|
if tool is not None:
|
|
tool.on_scroll(event)
|