util/cairo-view

   1 #!/usr/bin/python
   2
   3 import sys
   4 import cairo
   5 import pygtk
   6 pygtk.require('2.0')
   7 import gtk
   8 import gtk.gdk
   9 import pango
  10 import gobject
  11
  12 class CairoView(gtk.Window):
  13     def __init__(self, family="", slant=0, weight=0, size=18, text="The Quick Brown Fox Jumps Over The Lazy Dog!"):
  14         gtk.Widget.__init__ (self)
  15
  16         self.family = family
  17         if slant == "italic":
  18             self.slant = cairo.FONT_SLANT_ITALIC
  19         elif slant == "oblique":
  20             self.slant = cairo.FONT_SLANT_OBLIQUE
  21         else:
  22             self.slant = cairo.FONT_SLANT_NORMAL
  23         if weight == "bold":
  24             self.weight = cairo.FONT_WEIGHT_BOLD
  25         else:
  26             self.weight = cairo.FONT_WEIGHT_NORMAL
  27         self.size = float (size)
  28         self.text = text
  29
  30     def do_realize(self):
  31         self.set_flags(self.flags() | gtk.REALIZED)
  32
  33         self.window = gtk.gdk.Window(
  34             self.get_parent_window(),
  35             width=self.allocation.width,
  36             height=self.allocation.height,
  37             window_type=gtk.gdk.WINDOW_CHILD,
  38             wclass=gtk.gdk.INPUT_OUTPUT,
  39             event_mask=self.get_events() | gtk.gdk.EXPOSURE_MASK)
  40
  41         self.window.set_user_data(self)
  42
  43         self.style.attach(self.window)
  44
  45         self.style.set_background(self.window, gtk.STATE_NORMAL)
  46
  47         self.width, self.height = self.draw ()
  48         self.window.move_resize(0, 0, self.width, self.height)
  49
  50     def do_unrealize(self):
  51         self.window.destroy()
  52
  53     def do_expose_event(self, event):
  54         self.draw (event)
  55
  56         return False
  57
  58     def draw(self, event = None):
  59
  60         cr = self.window.cairo_create()
  61         if event:
  62                 cr.rectangle(event.area.x, event.area.y,
  63                              event.area.width, event.area.height)
  64                 cr.clip()
  65
  66         cr.set_source_rgb (1, 1, 1)
  67         cr.paint ()
  68
  69         cr.select_font_face (self.family, self.slant, self.weight)
  70         cr.set_font_size (self.size)
  71
  72         PAD = 30
  73
  74         extents = cr.text_extents (self.text)
  75         cr.translate (PAD-extents[0], PAD-extents[1])
  76
  77         font_extents = cr.font_extents ()
  78         cr.rectangle (0, -font_extents[0], extents[4], font_extents[2])
  79         cr.move_to (-PAD, 0)
  80         cr.line_to (extents[2]+PAD, 0)
  81         cr.set_source_rgba (1, 0, 0, .7)
  82         cr.stroke ()
  83
  84         cr.rectangle (*extents[:4])
  85         cr.set_source_rgba (0, 1, 0, .7)
  86         cr.stroke ()
  87
  88         cr.move_to (0, 0)
  89         cr.set_source_rgb (0, 0, 0)
  90         cr.show_text (self.text)
  91
  92         return int (extents[2]) + 2 * PAD, int (extents[3]) + 2 * PAD
  93
  94     def run(self):
  95
  96         self.props.allow_shrink = True
  97         self.connect("destroy", gtk.main_quit)
  98         self.show()
  99
 100         gtk.main()
 101
 102 gobject.type_register(CairoView)
 103
 104 def main(args):
 105
 106     if len (args) == 1:
 107         print "usage: cairo-view family [slant [weight [size [text]]]]"
 108         sys.exit (1)
 109     cv= CairoView (*args[1:])
 110     cv.run()
 111
 112 if __name__ == "__main__":
 113     main(sys.argv)