def _check_recording_started(self):
"""Ensure command is in the recording phase"""
assert not self._recording_finished
if self._recording_started:
return
# Cache the layer being painted to. This is accessed frequently
# during the painting phase.
model = self.doc
layer = model.layer_stack.deepget(self._layer_path)
assert layer is not None, \
"Layer with path %r not available" % (self._layer_path,)
if not layer.get_paintable():
logger.warning(
"Brushwork: skipped non-paintable layer %r",
layer,
)
return
self._stroke_target_layer = layer
assert self._sshot_before is None
assert self._time_before is None
assert self._stroke_seq is None
self._sshot_before = layer.save_snapshot()
self._time_before = model.unsaved_painting_time
self._stroke_seq = lib.stroke.Stroke()
self._stroke_seq.start_recording(model.brush)
assert self._sshot_after is None
self._recording_started = True
def update_cursor(self):
# Callback for updating the cursor
if not self.get_mapped():
return
window = self.get_window()
app = self.app
if window is None:
logger.error("update_cursor: no window")
return
override_cursor = self._override_cursor
layer = self.doc._layers.current
if override_cursor is not None:
c = override_cursor
elif self.get_state() == gtk.STATE_INSENSITIVE:
c = None
elif self.doc is None:
logger.error("update_cursor: no document")
return
elif layer.locked or not layer.visible or not layer.get_paintable():
# Cursor to represent that one cannot draw.
# Often a red circle with a diagonal bar through it.
c = gdk.Cursor(gdk.CIRCLE)
elif app is None:
logger.error("update_cursor: no app")
return
# Last two cases only pertain to FreehandMode cursors.
# XXX refactor: bad for separation of responsibilities, put the
# special cases in the mode class.
elif app.preferences.get("cursor.freehand.style", None) == 'crosshair':
c = app.cursors.get_freehand_cursor()
else:
radius, style = self._get_cursor_info()
c = cursor.get_brush_cursor(radius, style, self.app.preferences)
window.set_cursor(c)
def _check_recording_started(self):
"""Ensure command is in the recording phase"""
assert not self._recording_finished
if self._recording_started:
return
# Cache the layer being painted to. This is accessed frequently
# during the painting phase.
model = self.doc
layer = model.layer_stack.deepget(self._layer_path)
assert layer is not None, \
"Layer with path %r not available" % (self._layer_path,)
if not layer.get_paintable():
logger.warning(
"Brushwork: skipped non-paintable layer %r",
layer,
)
return
self._stroke_target_layer = layer
assert self._sshot_before is None
assert self._time_before is None
assert self._stroke_seq is None
self._sshot_before = layer.save_snapshot()
self._time_before = model.unsaved_painting_time
self._stroke_seq = lib.stroke.Stroke()
self._stroke_seq.start_recording(model.brush)
assert self._sshot_after is None
self._recording_started = True
def stroke_to(self, dtime, x, y, pressure, xtilt, ytilt):
"""Painting: forward a stroke position update to the model
:param float dtime: Seconds since the last call to this method
:param float x: Document X position update
:param float y: Document Y position update
:param float pressure: Pressure, ranging from 0.0 to 1.0
:param float xtilt: X-axis tilt, ranging from -1.0 to 1.0
:param float ytilt: Y-axis tilt, ranging from -1.0 to 1.0
Stroke data is recorded at this level, but strokes are not
autosplit here because that would involve the creation of a new
Brushwork command on the CommandStack. Instead, callers should
check `split_due` and split appropriately.
An example of a GUI mode which does just this can be found in
the complete MyPaint distribution in gui/.
"""
# Model and layer being painted on. Called frequently during the
# painting phase, so use a cache to avoid excessive layers tree
# climbing.
model = self.doc
if self._layer_ref is None:
layer = model.layer_stack.deepget(self._layer_path)
if not layer.get_paintable():
logger.debug("Skipped non-paintable layer %r", layer)
return
self._layer_ref = weakref.ref(layer)
else:
layer = self._layer_ref()
if layer is None:
logger.error("Layer was deleted while painting was in "
"progress: undo stack is probably broken now")
self.split_due = True
return
if not self._stroke_seq:
self._stroke_seq = lib.stroke.Stroke()
self._time_before = model.unsaved_painting_time
self._sshot_before = layer.save_snapshot()
self._stroke_seq.start_recording(model.brush)
brush = model.brush
self._stroke_seq.record_event(dtime, x, y, pressure,
xtilt, ytilt)
self.split_due = layer.stroke_to(brush, x, y, pressure,
xtilt, ytilt, dtime)
self._last_pos = (x, y, xtilt, ytilt)
