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  • Committer: Curtis Hovey
  • Date: 2011-09-03 18:00:39 UTC
  • mto: This revision was merged to the branch mainline in revision 741.
  • Revision ID: sinzui.is@verizon.net-20110903180039-c1z6lzeso7xywcfz
Hacked missing cairo constants. Used PangoCairo lib to show tags.

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branchview/graphcell.py
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just be for the background.
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"""
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__copyright__ = "Copyright © 2005 Canonical Ltd."
 
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__copyright__ = "Copyright © 2005-2011 Canonical Ltd."
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__author__    = "Scott James Remnant <scott@ubuntu.com>"
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from gi.repository import Gtk
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from gi.repository import GObject
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from gi.repository import Pango
 
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from gi.repository import PangoCairo
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from gi.repository import cairo
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# Cairo constants are not exported yet. These are taken from documentation.
 
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CAIRO_LINE_CAP_BUTT = 0
 
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CAIRO_LINE_CAP_ROUND = 1
 
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CAIRO_LINE_CAP_SQUARE = 2
 
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CAIRO_FILL_RULE_WINDING = 0
 
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CAIRO_FILL_RULE_EVEN_ODD = 1
 
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class CellRendererGraph(Gtk.CellRendererPixbuf):
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    """Cell renderer for directed graph.
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        ctx.set_source_rgb(red, green, blue)
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    def do_activate(event, widget, path, background_area, cell_area, flags):
 
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    def do_activate(event, widget, path, bg_area, cell_area, flags):
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        return True
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    def do_editing_started(event, widget, path, background_area, cell_area,
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                           flags):
 
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    def do_editing_started(event, widget, path, fb_area, cell_area, flags):
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        return None
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    def do_get_size(self, widget, cell_area):
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    def render_line(self, ctx, cell_area, box_size,
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                    mid, height, start, end, colour, flags):
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        if start is None:
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            #ctx.set_line_cap(cairo.LINE_CAP_ROUND)
 
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            ctx.set_line_cap(CAIRO_LINE_CAP_ROUND)
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            x = cell_area.x + box_size * end + box_size / 2
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            ctx.move_to(x, mid + height / 3)
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            ctx.line_to(x, mid + height / 3)
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            ctx.line_to(x, mid + height / 6)
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        elif end is None:
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            #ctx.set_line_cap(cairo.LINE_CAP_ROUND)
 
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            ctx.set_line_cap(CAIRO_LINE_CAP_ROUND)
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            x = cell_area.x + box_size * start + box_size / 2
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            ctx.move_to(x, mid - height / 3)
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            ctx.line_to(x, mid - height / 3)
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            ctx.line_to(x, mid - height / 6)
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        else:
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            #ctx.set_line_cap(cairo.LINE_CAP_BUTT)
 
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            ctx.set_line_cap(CAIRO_LINE_CAP_BUTT)
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            startx = cell_area.x + box_size * start + box_size / 2
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            endx = cell_area.x + box_size * end + box_size / 2
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            self.set_colour(ctx, TAG_COLOUR_ID, 0.0, 0.5)
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            ctx.stroke_preserve()
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            ctx.set_fill_rule (cairo.FILL_RULE_EVEN_ODD)
 
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            ctx.set_fill_rule (CAIRO_FILL_RULE_EVEN_ODD)
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            self.set_colour(ctx, TAG_COLOUR_ID, 0.5, 1.0)
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            ctx.fill()
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            # Draw the tag text
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            self.set_colour(ctx, 0, 0.0, 0.0)
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            ctx.move_to(x0, y0)
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            ctx.show_layout(tag_layout)
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            PangoCairo.show_layout(ctx, tag_layout)