Attachment 12252 Details for Bug 12996 – test case -- all squares should blink red/yellow

test case -- all squares should blink red/yellow

test_cairo_composite.py (text/x-python), 3.48 KB, created by Nathaniel Smith on 2007-10-29 20:21:39 UTC

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Creator: Nathaniel Smith

Created: 2007-10-29 20:21:39 UTC

Size: 3.48 KB

patch

obsolete

>import gobject
>import gtk
>import cairo
>
>class Blinker(gtk.DrawingArea):
>    def __init__(self):
>        gtk.DrawingArea.__init__(self)
>        gobject.timeout_add(500, self.redraw)
>        self.color = 0
>
>    def do_size_request(self, requisition):
>        requisition.width = 100
>        requisition.height = 100
>
>    def redraw(self):
>        if not self.flags() & gtk.MAPPED:
>            return
>        print "<BLINK>!"
>        cr = self.window.cairo_create()
>        self.color = not self.color
>        cr.set_source_rgb(1, self.color, 0)
>        cr.paint()
>        return True
>gobject.type_register(Blinker)
>
>class ExposeForwarder(gtk.EventBox):
>    def __init__(self, forward_to):
>        self.forward_to = forward_to
>        gtk.EventBox.__init__(self)
>
>    def do_expose_event(self, event):
>        print "FORWARD"
>        self.forward_to(self.child.window)
>gobject.type_register(ExposeForwarder)
>
>class BlinkWatcher(gtk.EventBox):
>    def __init__(self, alpha):
>        self.alpha = alpha
>        gtk.EventBox.__init__(self)
>
>    def do_realize(self):
>        gtk.EventBox.do_realize(self)
>        self._other_window = gtk.gdk.Window(self.window,
>                                            width=self.allocation.width,
>                                            height=self.allocation.height,
>                                            window_type=gtk.gdk.WINDOW_CHILD,
>                                            wclass=gtk.gdk.INPUT_OUTPUT,
>                                            event_mask=self.get_events())
>        self._other_window.show()
>
>    def do_size_allocate(self, allocation):
>        gtk.EventBox.do_size_allocate(self, allocation)
>        if self.flags() & gtk.REALIZED:
>            self._other_window.resize(allocation[2], allocation[3])
>
>    def composite_was_damaged(self, composite_window):
>        if not self.flags() & gtk.MAPPED:
>            return
>
>        print "DAMAGE!"
>        cr = self._other_window.cairo_create()
>        cr.set_operator(cairo.OPERATOR_SOURCE)
>        cr.set_source_rgb(1, 1, 1)
>        cr.paint()
>        cr.set_operator(cairo.OPERATOR_OVER)
>        cr.set_source_surface(composite_window.cairo_create().get_target(),
>                              0, 0)
>        cr.paint_with_alpha(self.alpha)
>        #cr.paint()
>gobject.type_register(BlinkWatcher)
>
>##########################################################
>
>vbox = gtk.VBox()
>win = gtk.Window()
>win.add(vbox)
>win.show_all()
>
>def add_watcher(vbox, intermediate, alpha):
>    composited = Blinker()
>    if intermediate:
>        eventbox = gtk.EventBox()
>        eventbox.add(composited)
>        composited = eventbox
>    watcher = BlinkWatcher(alpha)
>    forwarder = ExposeForwarder(watcher.composite_was_damaged)
>    watcher.add(forwarder)
>    forwarder.add(composited)
>    vbox.add(watcher)
>    watcher.show_all()
>    watcher._other_window.raise_()
>    composited.window.set_composited(True)
>    return watcher
>
># VBox goes:
># 1) unadorned blinker widget (uncomposited)
>vbox.add(Blinker())
>vbox.add(gtk.HSeparator())
># 2) blinker directly composited with paint_with_alpha(0.99)
>add_watcher(vbox, False, 0.99)
>vbox.add(gtk.HSeparator())
># 3) blinker directly composited with paint_with_alpha(1)
>add_watcher(vbox, False, 1)
>vbox.add(gtk.HSeparator())
># 4) blinker inside an eventbox that itself is then composited with
>#    paint_with_alpha(0.99)
>add_watcher(vbox, True, 0.99)
>vbox.add(gtk.HSeparator())
># 5) blinker inside an eventbox that itself is then composited with
>#    paint_with_alpha(1)
>add_watcher(vbox, True, 1)
>
>win.show_all()
>gtk.main()

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Attachments on bug 12996: 12252 | 12498

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