Hi, On Wed, Dec 23, 2009 at 5:28 PM, Brent Chiodo <bchi...@gmail.com> wrote: > Hi, > > The code I've been looking at is a fairly simple widget in Extras called > countdown-home. 95% of it is "fluff" and has nothing to do with this problem > so I've attached a working Python Desktop Widget (very simple, just a couple > gtk.Label's). countdown-home is available from here: > > http://repository.maemo.org/extras/pool/fremantle/free/source/c/countdown-home/ > > (I tried attaching the C file, but the list said it was too big). > > If you could try to translate the cairo code from coundown-home into the > Python example, that would be awesome!
I didn't translate the code above, but the simpler example Marc sent (example_clock_widget), because it was just easier to experiment with (and I will probably add to the examples section on the PyMaemo wiki page). But from this translation experiment, I noticed a few points you must be aware when implementing python widgets using cairo: * Use do_expose_event() and do_realize() methods instead of realize() and screen_changed() ones you used (just rename "def expose(self, widget, event)" to "def do_expose_event(self, event)" and "def screen_changed(self, widget)" to "def do_realize(self)" * Remember to call hildondesktop.HomePluginItem.do_realize(self) at the end of your do_realize() implementation (**very important**). This is needed because hildondesktop has its own internal implementation that must be called. The code is attached. Merry Christmas :) PS: I didn't translate the settings dialog part yet. Will do so later. Regards, -- Anderson Lizardo OpenBossa Labs - INdT Manaus - Brazil
# Example based on C code from: # https://garage.maemo.org/svn/maemoexamples/trunk/example_desktop_widget/src/example_clock_desktop_widget.c import math import time import sys import gtk import glib import cairo import hildon import hildondesktop def on_timeout(widget): widget.time = time.localtime() if not widget.window: return True region = widget.window.get_clip_region() if not region: return True widget.window.invalidate_region(region, True) widget.window.process_updates(True) return True def on_destroy(object): glib.source_remove(object.timeout_handler) def on_button_press_event(widget, event): text = "Current Time: %s" % time.asctime(widget.time) hildon.hildon_banner_show_information(widget, "", text) return True class HelloHomePlugin(hildondesktop.HomePluginItem): def __init__(self): hildondesktop.HomePluginItem.__init__(self) self.timeout_handler = glib.timeout_add(1000, on_timeout, self) self.color = gtk.gdk.color_parse("white") self.time = time.localtime() mask = self.get_events() | gtk.gdk.BUTTON_PRESS_MASK self.set_events(mask) self.connect("button-press-event", on_button_press_event) # TODO: add settings dialog #self.set_settings(True) #self.connect("show-settings", on_show_settings) # FIXME: is there any equivalent of the "dispose" callback? self.connect("destroy", on_destroy) def _draw(self, cr): cr.set_source_rgba(1.0, 1.0, 1.0, 0.0) cr.set_operator(cairo.OPERATOR_SOURCE) cr.paint() x = self.allocation.width / 2 y = self.allocation.height / 2 radius = min(x, y) - 5 cr.arc(x, y, radius, 0, 2 * math.pi) cr.set_source_rgb(self.color.red / 65535, self.color.green / 65535, self.color.blue / 65535) cr.fill_preserve() cr.set_source_rgb(0, 0, 0) cr.stroke() for i in range(0, 12): inset = 0 cr.save() if i % 3 == 0: inset = 0.2 * radius else: inset = 0.1 * radius cr.set_line_width(0.5 * cr.get_line_width()) cr.move_to(x + (radius - inset) * math.cos(i * math.pi / 6), y + (radius - inset) * math.sin(i * math.pi / 6)) cr.line_to(x + radius * math.cos(i * math.pi / 6), y + radius * math.sin(i * math.pi / 6)) cr.stroke() cr.restore() hours, minutes, seconds = self.time[3:6] cr.save() cr.set_line_width(2.5 * cr.get_line_width()) cr.move_to(x, y) cr.line_to(x + radius / 2 * math.sin(math.pi / 6 * hours + math.pi / 360 * minutes), y + radius / 2 * -math.cos(math.pi / 6 * hours + math.pi / 360 * minutes)) cr.stroke() cr.restore() cr.move_to(x, y) cr.line_to(x + radius * 0.75 * math.sin(math.pi / 30 * minutes), y + radius * 0.75 * -math.cos(math.pi / 30 * minutes)) cr.stroke() cr.save() cr.set_source_rgb(1, 0, 0) cr.move_to(x, y) cr.line_to(x + radius * 0.7 * math.sin(math.pi / 30 * seconds), y + radius * 0.7 * -math.cos(math.pi / 30 * seconds)) cr.stroke() cr.restore() def do_expose_event(self, event): cr = self.window.cairo_create() cr.rectangle(event.area.x, event.area.y, event.area.width, event.area.height) cr.clip() self._draw(cr) def do_realize(self): screen = self.get_screen() self.set_colormap(screen.get_rgba_colormap()) self.set_app_paintable(True) hildondesktop.HomePluginItem.do_realize(self) hd_plugin_type = HelloHomePlugin if __name__ == "__main__": import gobject gobject.type_register(hd_plugin_type) obj = gobject.new(hd_plugin_type, plugin_id="plugin_id") obj.show_all() gtk.main()
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