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# @Base: Miro - an RSS based video player application
# Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011
# Participatory Culture Foundation
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
#
# In addition, as a special exception, the copyright holders give
# permission to link the code of portions of this program with the OpenSSL
# library.
#
# You must obey the GNU General Public License in all respects for all of
# the code used other than OpenSSL. If you modify file(s) with this
# exception, you may extend this exception to your version of the file(s),
# but you are not obligated to do so. If you do not wish to do so, delete
# this exception statement from your version. If you delete this exception
# statement from all source files in the program, then also delete it here.
""".drawing -- Contains classes used to draw on
widgets.
"""
import cairo
import gobject
import gtk
import wrappermap
from .base import Widget, Bin
from .layoutmanager import LayoutManager
def css_to_color(css_string):
parts = (css_string[1:3], css_string[3:5], css_string[5:7])
return tuple((int(value, 16) / 255.0) for value in parts)
class ImageSurface:
def __init__(self, image):
format = cairo.FORMAT_RGB24
if image.pixbuf.get_has_alpha():
format = cairo.FORMAT_ARGB32
self.image = cairo.ImageSurface(
format, int(image.width), int(image.height))
context = cairo.Context(self.image)
gdkcontext = gtk.gdk.CairoContext(context)
gdkcontext.set_source_pixbuf(image.pixbuf, 0, 0)
gdkcontext.paint()
self.pattern = cairo.SurfacePattern(self.image)
self.pattern.set_extend(cairo.EXTEND_REPEAT)
self.width = image.width
self.height = image.height
def get_size(self):
return self.width, self.height
def _align_pattern(self, x, y):
"""Line up our image pattern so that it's top-left corner is x, y."""
m = cairo.Matrix()
m.translate(-x, -y)
self.pattern.set_matrix(m)
def draw(self, context, x, y, width, height, fraction=1.0):
self._align_pattern(x, y)
cairo_context = context.context
cairo_context.save()
cairo_context.set_source(self.pattern)
cairo_context.new_path()
cairo_context.rectangle(x, y, width, height)
if fraction >= 1.0:
cairo_context.fill()
else:
cairo_context.clip()
cairo_context.paint_with_alpha(fraction)
cairo_context.restore()
def draw_rect(self, context, dest_x, dest_y, source_x, source_y,
width, height, fraction=1.0):
self._align_pattern(dest_x-source_x, dest_y-source_y)
cairo_context = context.context
cairo_context.save()
cairo_context.set_source(self.pattern)
cairo_context.new_path()
cairo_context.rectangle(dest_x, dest_y, width, height)
if fraction >= 1.0:
cairo_context.fill()
else:
cairo_context.clip()
cairo_context.paint_with_alpha(fraction)
cairo_context.restore()
class DrawingStyle(object):
def __init__(self, widget, use_base_color=False, state=None):
if state is None:
state = widget._widget.state
self.use_custom_style = widget.use_custom_style
self.style = widget._widget.style
self.text_color = widget.convert_gtk_color(self.style.text[state])
if use_base_color:
self.bg_color = widget.convert_gtk_color(self.style.base[state])
else:
self.bg_color = widget.convert_gtk_color(self.style.bg[state])
class DrawingContext(object):
"""DrawingContext. This basically just wraps a Cairo context and adds a
couple convenience methods.
"""
def __init__(self, window, drawing_area, expose_area):
self.window = window
self.context = window.cairo_create()
self.context.rectangle(expose_area.x, expose_area.y,
expose_area.width, expose_area.height)
self.context.clip()
self.width = drawing_area.width
self.height = drawing_area.height
self.context.translate(drawing_area.x, drawing_area.y)
def __getattr__(self, name):
return getattr(self.context, name)
def set_color(self, (red, green, blue), alpha=1.0):
self.context.set_source_rgba(red, green, blue, alpha)
def set_shadow(self, color, opacity, offset, blur_radius):
pass
def gradient_fill(self, gradient):
old_source = self.context.get_source()
self.context.set_source(gradient.pattern)
self.context.fill()
self.context.set_source(old_source)
def gradient_fill_preserve(self, gradient):
old_source = self.context.get_source()
self.context.set_source(gradient.pattern)
self.context.fill_preserve()
self.context.set_source(old_source)
class Gradient(object):
def __init__(self, x1, y1, x2, y2):
self.pattern = cairo.LinearGradient(x1, y1, x2, y2)
def set_start_color(self, (red, green, blue)):
self.pattern.add_color_stop_rgb(0, red, green, blue)
def set_end_color(self, (red, green, blue)):
self.pattern.add_color_stop_rgb(1, red, green, blue)
class CustomDrawingMixin(object):
def do_expose_event(self, event):
wrapper = wrappermap.wrapper(self)
if self.flags() & gtk.NO_WINDOW:
drawing_area = self.allocation
else:
drawing_area = gtk.gdk.Rectangle(0, 0,
self.allocation.width,
self.allocation.height)
context = DrawingContext(event.window, drawing_area, event.area)
context.style = DrawingStyle(wrapper)
if self.flags() & gtk.CAN_FOCUS:
focus_space = (self.style_get_property('focus-padding') +
self.style_get_property('focus-line-width'))
if not wrapper.squish_width:
context.width -= focus_space * 2
translate_x = focus_space
else:
translate_x = 0
if not wrapper.squish_height:
context.height -= focus_space * 2
translate_y = focus_space
else:
translate_y = 0
context.translate(translate_x, translate_y)
wrapper.layout_manager.update_cairo_context(context.context)
self.draw(wrapper, context)
def draw(self, wrapper, context):
wrapper.layout_manager.reset()
wrapper.draw(context, wrapper.layout_manager)
def do_size_request(self, requesition):
wrapper = wrappermap.wrapper(self)
width, height = wrapper.size_request(wrapper.layout_manager)
requesition.width = width
requesition.height = height
if self.flags() & gtk.CAN_FOCUS:
focus_space = (self.style_get_property('focus-padding') +
self.style_get_property('focus-line-width'))
if not wrapper.squish_width:
requesition.width += focus_space * 2
if not wrapper.squish_height:
requesition.height += focus_space * 2
class MiroDrawingArea(CustomDrawingMixin, gtk.Widget):
def __init__(self):
gtk.Widget.__init__(self)
CustomDrawingMixin.__init__(self)
self.set_flags(gtk.NO_WINDOW)
class BackgroundWidget(CustomDrawingMixin, gtk.Bin):
def do_size_request(self, requesition):
CustomDrawingMixin.do_size_request(self, requesition)
if self.get_child():
child_width, child_height = self.get_child().size_request()
requesition.width = max(child_width, requesition.width)
requesition.height = max(child_height, requesition.height)
def do_expose_event(self, event):
CustomDrawingMixin.do_expose_event(self, event)
if self.get_child():
self.propagate_expose(self.get_child(), event)
def do_size_allocate(self, allocation):
gtk.Bin.do_size_allocate(self, allocation)
if self.get_child():
self.get_child().size_allocate(allocation)
gobject.type_register(MiroDrawingArea)
gobject.type_register(BackgroundWidget)
class Drawable:
def __init__(self):
self.squish_width = self.squish_height = False
def set_squish_width(self, setting):
self.squish_width = setting
def set_squish_height(self, setting):
self.squish_height = setting
def set_widget(self, drawing_widget):
if self.is_opaque() and 0:
box = gtk.EventBox()
box.add(drawing_widget)
Widget.set_widget(self, box)
else:
Widget.set_widget(self, drawing_widget)
self.layout_manager = LayoutManager(self._widget)
def size_request(self, layout_manager):
return 0, 0
def draw(self, context, layout_manager):
pass
def is_opaque(self):
return False
class DrawingArea(Drawable, Widget):
def __init__(self):
Widget.__init__(self)
Drawable.__init__(self)
self.set_widget(MiroDrawingArea())
class Background(Drawable, Bin):
def __init__(self):
Bin.__init__(self)
Drawable.__init__(self)
self.set_widget(BackgroundWidget())
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