def reset_view_cb(self, command):
if command is None:
command_name = None
reset_all = True
else:
command_name = command.get_name()
reset_all = (command_name is None) or ('View' in command_name)
if reset_all or ('Rotation' in command_name):
self.tdw.set_rotation(0.0)
if reset_all or ('Zoom' in command_name):
default_zoom = self.app.preferences['view.default_zoom']
self.tdw.set_zoom(default_zoom)
if reset_all or ('Mirror' in command_name):
self.tdw.set_mirrored(False)
if reset_all:
self.tdw.recenter_document()
elif 'Fit' in command_name:
# View>Fit: fits image within window's borders.
junk, junk, w, h = self.tdw.doc.get_effective_bbox()
if w == 0:
# When there is nothing on the canvas reset zoom to default.
self.reset_view_cb(None)
else:
allocation = self.tdw.get_allocation()
w1, h1 = allocation.width, allocation.height
# Store radians and reset rotation to zero.
radians = self.tdw.rotation
self.tdw.set_rotation(0.0)
# Store mirror and temporarily it turn off mirror.
mirror = self.tdw.mirrored
self.tdw.set_mirrored(False)
# Using w h as the unrotated bbox, calculate the bbox of the
# rotated doc.
cos = math.cos(radians)
sin = math.sin(radians)
wcos = w * cos
hsin = h * sin
wsin = w * sin
hcos = h * cos
# We only need to calculate the positions of two corners of the
# bbox since it is centered and symetrical, but take the max
# value since during rotation one corner's distance along the
# x axis shortens while the other lengthens. Same for the y axis.
x = max(abs(wcos - hsin), abs(wcos + hsin))
y = max(abs(wsin + hcos), abs(wsin - hcos))
# Compare the doc and window dimensions and take the best fit
zoom = min((w1-20)/x, (h1-20)/y)
# Reapply all transformations
self.tdw.recenter_document() # Center image
self.tdw.set_rotation(radians) # reapply canvas rotation
self.tdw.set_mirrored(mirror) #reapply mirror
self.tdw.set_zoom(zoom, at_pointer=False) # Set new zoom level
def reset_view_cb(self, command):
if command is None:
command_name = None
reset_all = True
else:
command_name = command.get_name()
reset_all = (command_name is None) or ("View" in command_name)
if reset_all or ("Rotation" in command_name):
self.tdw.set_rotation(0.0)
if reset_all or ("Zoom" in command_name):
default_zoom = self.app.preferences["view.default_zoom"]
self.zoomlevel = self.zoomlevel_values.index(default_zoom)
self.tdw.set_zoom(default_zoom)
if reset_all or ("Mirror" in command_name):
self.tdw.set_mirrored(False)
if reset_all:
self.tdw.recenter_document()
def reset_view_cb(self, command):
"""Action callback: resets various aspects of the view.
The reset chosen depends on the action's name.
"""
if command is None:
command_name = None
else:
command_name = command.get_name()
zoom = mirror = rotation = False
if command_name is None or 'View' in command_name:
zoom = mirror = rotation = True
elif 'Rotation' in command_name:
rotation = True
elif 'Zoom' in command_name:
zoom = True
elif 'Mirror' in command_name:
mirror = True
if rotation or zoom or mirror:
self.reset_view(rotation, zoom, mirror)
self.clear_saved_view()
