Python Color.rgb16方法代码示例

# 需要导入模块: from color import Color [as 别名]
# 或者: from color.Color import rgb16 [as 别名]
class ColorPicker(gtk.Widget):
  """
  A widget to select colors from the screen

  This displays the currently selected color and handles grabbing a color
  from anywhere on screen.

  It also allows dragging and dropping of colors from and onto the widget.

  Signals:
    'save-color' - save the current color
  """
  data_path = os.path.join(os.path.dirname(__file__), 'data')
  icon_path = os.path.join(data_path, 'icons')

  __gsignals__ = {
      'save-color': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE, ())
  }

  def __init__(self):
    """ Initialize color picker """
    super(ColorPicker, self).__init__()
    self.pick_rate = 60
    self.color = Color()
    self.mag = None
    self.picking = 0
    self.pick_timeout = None
    self.save_on_release = False

  def set_magnifier(self, mag):
    """
    Set the magnifier widget
    This is needed so that we can pick colors directly from the magnified
    image when possible
    """
    self.mag = mag

  def set_color(self, color):
    """
    Set the color object to store selected colors in

    This color object is updated when a new color is selected or dropped
    on the widget.

    To explicitly change the selected color, do not use this function, but
    instead call set_rgb() or set_hsv() on the current color object.
    """
    self.color = color
    self.color.connect('changed', self.color_changed)

  def color_changed(self, color):
    """ Callback for color changes """
    if not self.flags() & gtk.REALIZED: return

    r,g,b = self.color.rgb16()
    col = self.gc.get_colormap().alloc_color(r, g, b, False, False)
    self.gc.set_foreground(col)
    self.queue_draw()

  def pick_immediate(self, x, y, magnifier):
    """
    Select the color at the specified pixel

    The coordinates are relative to the screen.
    """

    if self.flags() & gtk.REALIZED == False: return

    if magnifier:
      r,g,b = self.mag.raw_pixbuf.get_pixels_array()[y,x]
    else:
      # grab raw screen data
      self.raw_pixbuf.get_from_drawable(
          gdk.get_default_root_window(),
          gdk.colormap_get_system(),
          x, y,
          0, 0,
          self.raw_width, self.raw_height)

      #pull out rgb value
      #XXX first time this is called generates a warning and doesn't work.
      #    all subsequent times are fine. why?
      r,g,b = self.raw_pixbuf.get_pixels_array()[0,0]

    self.color.set_rgb(r,g,b)

  def cb_pick_timeout(self):
    """ Callback for pick timeout """
    # repeat time until we've realized the widget
    if self.flags() & gtk.REALIZED == False:
      return True

    # widget is realized, so grab data and end timer
    self.pick_immediate(self.pick_x, self.pick_y, self.pick_mag)
    self.pick_timeout = None
    return False

  def cb_drag_set_color(self, color, x, y):
    """ Drag set color callback """
    self.color.set_rgb(*color.rgb())
#.........这里部分代码省略.........