diff options
Diffstat (limited to 'Workshop.activity/Rating.py')
| -rw-r--r-- | Workshop.activity/Rating.py | 144 |
1 files changed, 144 insertions, 0 deletions
diff --git a/Workshop.activity/Rating.py b/Workshop.activity/Rating.py new file mode 100644 index 0000000..a13e5a2 --- /dev/null +++ b/Workshop.activity/Rating.py @@ -0,0 +1,144 @@ +import gtk +from gtk import gdk +import logging + +class Rating(gtk.Widget): + """ + Controls that display the rating of a tutorial using colored stars + """ + def __init__(self,tutorial,controller, rating=0,editable = False): + """ + Constructor + + @param the controller to link the view with + @param tutorial The tutorial for which this rating is + @param rating The rating to show + @param editable True if the rating may be edited + """ + gtk.Widget.__init__(self) + + self.tutorial = tutorial + self.controller = controller + self.editable = editable + self.rating = rating + + #star size is 24 pixels by 24 pixels + self.image_length = 24 + + def do_realize(self): + self.set_flags(self.flags() | gtk.REALIZED) + + self.window = gtk.gdk.Window( + self.get_parent_window(), + width=self.allocation.width, + height=self.allocation.height, + window_type=gdk.WINDOW_CHILD, + wclass=gdk.INPUT_OUTPUT, + event_mask=self.get_events() | gtk.gdk.EXPOSURE_MASK + | gtk.gdk.BUTTON_PRESS_MASK) + + self.window.set_user_data(self) + + self.style.attach(self.window) + + self.style.set_background(self.window, gtk.STATE_NORMAL) + self.window.move_resize(*self.allocation) + + #load the stars + pixbuf = gtk.gdk.pixbuf_new_from_file('full_star.png') + self.full_star,mask = pixbuf.render_pixmap_and_mask() + + pixbuf = gtk.gdk.pixbuf_new_from_file('half_star.png') + self.half_star,mask = pixbuf.render_pixmap_and_mask() + + image = gtk.Image() + pixbuf = gtk.gdk.pixbuf_new_from_file('grayed_star.png') + self.empty_star,mask =pixbuf.render_pixmap_and_mask() + + self.gc = self.style.fg_gc[gtk.STATE_NORMAL] + + def do_unrealize(self): + self.window.destroy() + + def do_size_request(self, requisition): + requisition.height = self.image_length + requisition.width = (self.image_length * 5) + + def do_size_allocate(self, allocation): + self.allocation = allocation + if self.flags() & gtk.REALIZED: + self.window.move_resize(*allocation) + + def do_expose_event(self, event): + """ + The widget is drawn here + """ + value = self.rating + stars = [0,0,0,0,0] + if value > 0: + for x in range(5): + if value -1 > 0: + stars[x]=1 + elif value -1 == -0.5: + stars[x] = 0.5 + break + else: + stars[x]=1 + break + value -= 1 + + for x in range(0,5): + if stars[x] == 0: + self.window.draw_drawable(self.gc, self.empty_star, 0, 0 + , x*self.image_length + , 0,-1, -1) + elif stars[x] == 0.5: + self.window.draw_drawable(self.gc, self.half_star, 0, 0 + , x*self.image_length + , 0,-1, -1) + elif stars[x] == 1: + self.window.draw_drawable(self.gc, self.full_star, 0, 0 + , x*self.image_length + , 0,-1, -1) + + def do_button_press_event(self, event): + """When the button is pressed""" + + # make sure it was the first button + if self.editable: + if event.button == 1: + #check for new stars + self.check_for_new_stars(event.x) + + return True + + def check_for_new_stars(self, xPos): + """ + Computes the star number based on where the click was + """ + + new_stars = int(xPos / self.image_length) + half_star = xPos % self.image_length + + logging.info("xpos: %d, new_stars: %d, half_star: %d",xPos,new_stars,half_star) + if half_star > self.image_length/2: + new_stars +=1 + else: + new_stars = new_stars+0.5 + logging.info("rating: %f",new_stars) + self.controller.rate_tutorial(self.tutorial,new_stars) + + self.set_value(new_stars) + + def set_value(self, value): + """ + Sets the value and force a redraw + """ + + if (value >= 0): + self.rating = value + #check for the maximum + if (self.rating > 5): + self.rating = 5 + # redraw the widget + self.queue_draw()
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