doc/dev/splash-logo.py

   1
   2 # WIP. We might use this some time in the future.
   3 #              -- Thomas Perl, 2008-03-19
   4
   5 # Released under the same license as gPodder.
   6
   7 import gtk
   8 import gobject
   9 import cairo
  10
  11 class gPodderSplashScreen(gtk.Window):
  12     (WIDTH, HEIGHT) = (250, 250)
  13     (WAIT, STEP) = (100, 20)
  14
  15     def __init__(self, filename, caption):
  16         gtk.Window.__init__(self)
  17         self.caption = caption
  18         self.set_decorated(False)
  19         self.set_skip_taskbar_hint(True)
  20         self.set_keep_above(True)
  21         self.set_app_paintable(True)
  22         self.set_position(gtk.WIN_POS_CENTER)
  23         self.set_opacity(1)
  24         self.connect('expose-event', self.expose_event)
  25         self.connect('screen-changed', self.screen_changed)
  26         self.resize(self.WIDTH, self.HEIGHT)
  27
  28         self.fading_in = False
  29
  30         self.svgsur = self.load_surface_from_file(filename)
  31         self.screen_changed(self)
  32         self.show_all()
  33
  34     def fade_in(self):
  35         self.fading_in = True
  36         gobject.timeout_add(self.WAIT, self.update_opacity, True)
  37
  38     def fade_out(self):
  39         if self.is_composited():
  40             self.fading_in = False
  41             gobject.timeout_add(self.WAIT, self.update_opacity, False, True)
  42         else:
  43             self.destroy()
  44
  45     def expose_event(self, widget, event):
  46         cr = widget.window.cairo_create()
  47         if not self.is_composited():
  48             cr.set_source_rgb(0, 0, 0)
  49             cr.rectangle(0, 0, self.WIDTH, self.HEIGHT)
  50             cr.stroke()
  51             cr.set_source_rgb( 1, 1, 1)
  52             cr.rectangle(1, 1, self.WIDTH-2, self.HEIGHT-2)
  53             cr.fill()
  54         cr.set_source_rgba(0,0,0,0)
  55         if self.is_composited():
  56             cr.set_operator(cairo.OPERATOR_SOURCE)
  57         cr.paint()
  58         cr.set_source_surface(self.svgsur, 0, 0)
  59         cr.paint()
  60         cr.set_operator(cairo.OPERATOR_OVER)
  61         cr.select_font_face("sans-serif", cairo.FONT_SLANT_NORMAL, cairo.FONT_WEIGHT_NORMAL)
  62         texting = self.caption
  63         cr.set_font_size(30)
  64         cr.set_source_rgba(1, 1, 1, .5)
  65         (SHIFT_X, SHIFT_Y) = (20, -30)
  66         cr.move_to(SHIFT_X, self.HEIGHT+SHIFT_Y)
  67         cr.show_text(texting)
  68         cr.move_to(SHIFT_X+2, self.HEIGHT+SHIFT_Y+2)
  69         cr.show_text(texting)
  70         cr.move_to(SHIFT_X+2, self.HEIGHT+SHIFT_Y)
  71         cr.show_text(texting)
  72         cr.move_to(SHIFT_X, self.HEIGHT+SHIFT_Y+2)
  73         cr.show_text(texting)
  74         cr.fill()
  75         cr.set_source_rgba(0, 0, 0, 1)
  76         cr.move_to(SHIFT_X+1, self.HEIGHT+SHIFT_Y+1)
  77         cr.show_text(texting)
  78         cr.fill()
  79         return True
  80
  81     def screen_changed(self, widget, old_screen=None):
  82         cm = widget.get_screen().get_rgba_colormap()
  83         if cm is not None:
  84             widget.set_colormap(cm)
  85
  86     def load_surface_from_file(self, filename):
  87         pixbuf = gtk.gdk.pixbuf_new_from_file_at_size(filename, self.WIDTH, self.HEIGHT)
  88
  89         format = cairo.FORMAT_RGB24
  90         if pixbuf.get_has_alpha():
  91             format = cairo.FORMAT_ARGB32
  92         width = pixbuf.get_width()
  93         height = pixbuf.get_height()
  94         image = cairo.ImageSurface(format, width, height)
  95
  96         context = cairo.Context(image)
  97         gdkcontext = gtk.gdk.CairoContext(context)
  98         gdkcontext.set_source_pixbuf(pixbuf, 0, 0)
  99         gdkcontext.paint()
 100         return image
 101
 102     def update_opacity(self, increase=True, close_after=False):
 103         if increase and self.fading_in:
 104             opacity = min(1.0, max(0.1, self.get_opacity()*1.1))
 105         else:
 106             opacity = self.get_opacity()-0.05
 107         self.set_opacity(max(0.0, min(1.0, opacity)))
 108         if opacity >= 0.0 and opacity <= 1.0:
 109             gobject.timeout_add(self.STEP, self.update_opacity, increase, close_after)
 110         elif close_after:
 111             self.destroy()
 112
 113         return False
 114
 115