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trackplacer: implement a civilized quit button.

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This commit is contained in:
Eric S. Raymond 2008-10-13 04:08:38 +00:00
parent 9d6161f8e3
commit 9f10a7b737
1 changed files with 31 additions and 6 deletions
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37
data/tools/trackplacer
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@ -67,6 +67,8 @@ class JourneyTrack:
def __init__(self):
self.filename = None # Map background of the journey
self.track = [] # List of (action, x, y) tuples
self.modifications = 0
self.initial_track = []
def write(self, fp):
"Record a journey track."
fp.write("FILE %s\n" % self.filename)
@ -103,7 +105,10 @@ class JourneyTrack:
y = int(y)
except ValuError:
raise ReadException("invalid coordinate field", fp.name, i+1)
self.track.append((tag, x, y))
self.initial_track.append((tag, x, y))
self.track = self.initial_track
def has_unsaved_changes(self):
return self.track != self.initial_track
def __getitem__(self, n):
return self.track[n]
def __setitem__(self, n, v):
@ -266,7 +271,7 @@ class TrackEditor:
# A quit button
button = gtk.Button("Quit")
buttonbox.pack_end(button, expand=False, fill=False, padding=10)
button.connect_object("clicked", lambda w: w.destroy(), window)
button.connect_object("clicked", self.conditional_quit, window)
button.show()
# A save button
@ -353,10 +358,6 @@ class TrackEditor:
self.pixmap, x, y, x, y, width, height)
return False
def bounding_box(self, p, d=vision_distance):
"Return a feature-containing rangle around a pixel."
return (int(p[0]-d), int(p[1]-d), d*2, d*2)
def button_press_event(self, widget, event):
if event.button == 1 and self.pixmap != None:
x = int(event.x)
@ -397,6 +398,30 @@ class TrackEditor:
return True
#
# These two functions implement a civilized quit confirmation that
# prompts you if you have unnsaved changes
#
def conditional_quit(self, w):
if self.journey.has_unsaved_changes():
self.quit_check = gtk.Dialog(title="Really quit?",
parent=None,
flags=gtk.DIALOG_MODAL,
buttons=(gtk.STOCK_CANCEL, gtk.RESPONSE_REJECT,
gtk.STOCK_OK, gtk.RESPONSE_ACCEPT))
label = gtk.Label("Track has unsaved changes. OK to quit?")
self.quit_check.vbox.pack_start(label)
label.show()
self.quit_check.connect("response", self.conditional_quit_handler)
self.quit_check.run()
else:
sys.exit(0)
def conditional_quit_handler(self, widget, id):
if id == gtk.RESPONSE_ACCEPT:
sys.exit(0)
elif id == gtk.RESPONSE_REJECT:
self.quit_check.destroy()
def log(self, msg):
"Notify user of error and die."
if self.verbose: