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"""
HuntForReleaseAction_ToolStateBehavior.py - help subclasses highlight the same
thing they will do, for releasing the mouse (during a drag) on various objects or spaces
$Id$
"""
# refile into another directory?
from demoapp.foundation.MouseBehavior import parse_command, parse_transition, CMD_RETVAL, ToolStateBehavior
class HuntForReleaseAction_ToolStateBehavior(ToolStateBehavior): # rename?
"""
Abstract class for one common kind of ToolStateBehavior,
for use when the user is moving the mouse around during a drag,
to hunt for some action they can do by releasing the mouse at
specific points.
@see: HuntForClickAction_ToolStateBehavior, for similar behavior during mouse motion
(tip & highlight for places where mouse *down* has certain effects).
"""
# instance variables
_tip_and_highlight_info = None
def on_mouse_drag(self, x, y, dx, dy, buttons, modifiers):
# todo: only let this event "count" if we moved far enough? maybe let this be a param within transition??
button, modifiers = 0, 0 # see caveats/bugs in HuntForClickAction_ToolStateBehavior comment
transition = self.on_mouse_release_would_do(x, y, button, modifiers) ##### WRONG: button == 0 (but ignored by current code)
tip, command, next_state, handled = parse_transition( transition)
self._tip_and_highlight_info = tip
del command, next_state
return handled
## def on_mouse_leave(self, x, y):
## self._tip_and_highlight_info = None
## return None # in case other handlers want to know about this event
##
## def on_mouse_enter(self, x, y):
## return self.on_mouse_motion(x, y, 0, 0) #semi-guess
def on_mouse_release(self, x, y, button, modifiers):
"""
Do whatever self.on_mouse_release_would_do() says to do, for this state.
"""
transition = self.on_mouse_release_would_do(x, y, button, modifiers)
# pyglet API issue: if other mouse buttons are still pressed, do we have enough info??
tip, command, next_state, handled = parse_transition( transition)
del tip
self._tip_and_highlight_info = None # or something to say we're doing it, in case redraws occur during that?
self._cmd_retval = self._doit(command) # this value is used for CMD_RETVAL
assert self._cmd_retval or not command, "error: %r returns %r in %r" % \
(command, self._cmd_retval, self)
# not ok in general, but will help catch bugs for now ###
self.transition_to(next_state)
return handled
def _doit(self, command): # rename to mention "command"?
name, args = parse_command(command)
if not name:
return
# note: we don't use dispatch_event for model commands -- for one thing,
# it discards their return value (after using it for its own purposes).
retval = getattr(self.model, name)(*args) ### REFACTOR, should be self.model.do_command or so
assert retval # wrong in general, good for now ###
return retval
def on_draw_handle(self): #e rename?
"""
"""
if self._tip_and_highlight_info:
self.pane.draw_tip_and_highlight(
self._tip_and_highlight_info,
self.tool._f_HighlightGraphics_instance )
return
pass
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