1 files changed, 190 insertions, 0 deletions
diff --git a/grc/gui/Port.py b/grc/gui/Port.py
new file mode 100644
index 000000000..2896d04c1
--- /dev/null
+++ b/grc/gui/Port.py
@@ -0,0 +1,190 @@
+"""
+Copyright 2007, 2008, 2009 Free Software Foundation, Inc.
+This file is part of GNU Radio
+
+GNU Radio Companion 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.
+
+GNU Radio Companion 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 Street, Fifth Floor, Boston, MA  02110-1301, USA
+"""
+
+from Element import Element
+from Constants import \
+	PORT_SEPARATION, CONNECTOR_EXTENSION_MINIMAL, \
+	CONNECTOR_EXTENSION_INCREMENT, \
+	PORT_LABEL_PADDING, PORT_MIN_WIDTH
+import Utils
+import Colors
+import pygtk
+pygtk.require('2.0')
+import gtk
+
+PORT_MARKUP_TMPL="""\
+<span foreground="black" font_desc="Sans 7.5">$encode($port.get_name())</span>"""
+
+class Port(Element):
+	"""The graphical port."""
+
+	def __init__(self):
+		"""
+		Port contructor.
+		Create list of connector coordinates.
+		"""
+		Element.__init__(self)
+		self.connector_coordinates = dict()
+
+	def create_shapes(self):
+		"""Create new areas and labels for the port."""
+		Element.create_shapes(self)
+		#get current rotation
+		rotation = self.get_rotation()
+		#get all sibling ports
+		if self.is_source(): ports = self.get_parent().get_sources()
+		elif self.is_sink(): ports = self.get_parent().get_sinks()
+		#get the max width
+		self.W = max([port.W for port in ports] + [PORT_MIN_WIDTH])
+		#get a numeric index for this port relative to its sibling ports
+		index = ports.index(self)
+		length = len(ports)
+		#reverse the order of ports	for these rotations
+		if rotation in (180, 270): index = length-index-1
+		offset = (self.get_parent().H - length*self.H - (length-1)*PORT_SEPARATION)/2
+		#create areas and connector coordinates
+		if (self.is_sink() and rotation == 0) or (self.is_source() and rotation == 180):
+			x = -1*self.W
+			y = (PORT_SEPARATION+self.H)*index+offset
+			self.add_area((x, y), (self.W, self.H))
+			self._connector_coordinate = (x-1, y+self.H/2)
+		elif (self.is_source() and rotation == 0) or (self.is_sink() and rotation == 180):
+			x = self.get_parent().W
+			y = (PORT_SEPARATION+self.H)*index+offset
+			self.add_area((x, y), (self.W, self.H))
+			self._connector_coordinate = (x+1+self.W, y+self.H/2)
+		elif (self.is_source() and rotation == 90) or (self.is_sink() and rotation == 270):
+			y = -1*self.W
+			x = (PORT_SEPARATION+self.H)*index+offset
+			self.add_area((x, y), (self.H, self.W))
+			self._connector_coordinate = (x+self.H/2, y-1)
+		elif (self.is_sink() and rotation == 90) or (self.is_source() and rotation == 270):
+			y = self.get_parent().W
+			x = (PORT_SEPARATION+self.H)*index+offset
+			self.add_area((x, y), (self.H, self.W))
+			self._connector_coordinate = (x+self.H/2, y+1+self.W)
+		#the connector length
+		self._connector_length = CONNECTOR_EXTENSION_MINIMAL + CONNECTOR_EXTENSION_INCREMENT*index
+
+	def create_labels(self):
+		"""Create the labels for the socket."""
+		Element.create_labels(self)
+		self._bg_color = Colors.get_color(self.get_color())
+		#create the layout
+		layout = gtk.DrawingArea().create_pango_layout('')
+		layout.set_markup(Utils.parse_template(PORT_MARKUP_TMPL, port=self))
+		self.w, self.h = layout.get_pixel_size()
+		self.W, self.H = 2*PORT_LABEL_PADDING+self.w, 2*PORT_LABEL_PADDING+self.h
+		#create the pixmap
+		pixmap = self.get_parent().get_parent().new_pixmap(self.w, self.h)
+		gc = pixmap.new_gc()
+		gc.set_foreground(self._bg_color)
+		pixmap.draw_rectangle(gc, True, 0, 0, self.w, self.h)
+		pixmap.draw_layout(gc, 0, 0, layout)
+		#create vertical and horizontal pixmaps
+		self.horizontal_label = pixmap
+		if self.is_vertical():
+			self.vertical_label = self.get_parent().get_parent().new_pixmap(self.h, self.w)
+			Utils.rotate_pixmap(gc, self.horizontal_label, self.vertical_label)
+
+	def draw(self, gc, window):
+		"""
+		Draw the socket with a label.
+		@param gc the graphics context
+		@param window the gtk window to draw on
+		"""
+		Element.draw(
+			self, gc, window, bg_color=self._bg_color,
+			border_color=self.is_highlighted() and Colors.HIGHLIGHT_COLOR or Colors.BORDER_COLOR,
+		)
+		X,Y = self.get_coordinate()
+		(x,y),(w,h) = self._areas_list[0] #use the first area's sizes to place the labels
+		if self.is_horizontal():
+			window.draw_drawable(gc, self.horizontal_label, 0, 0, x+X+(self.W-self.w)/2, y+Y+(self.H-self.h)/2, -1, -1)
+		elif self.is_vertical():
+			window.draw_drawable(gc, self.vertical_label, 0, 0, x+X+(self.H-self.h)/2, y+Y+(self.W-self.w)/2, -1, -1)
+
+	def get_connector_coordinate(self):
+		"""
+		Get the coordinate where connections may attach to.
+		@return the connector coordinate (x, y) tuple
+		"""
+		x,y = self._connector_coordinate
+		X,Y = self.get_coordinate()
+		return (x+X, y+Y)
+
+	def get_connector_direction(self):
+		"""
+		Get the direction that the socket points: 0,90,180,270.
+		This is the rotation degree if the socket is an output or
+		the rotation degree + 180 if the socket is an input.
+		@return the direction in degrees
+		"""
+		if self.is_source(): return self.get_rotation()
+		elif self.is_sink(): return (self.get_rotation() + 180)%360
+
+	def get_connector_length(self):
+		"""
+		Get the length of the connector.
+		The connector length increases as the port index changes.
+		@return the length in pixels
+		"""
+		return self._connector_length
+
+	def get_rotation(self):
+		"""
+		Get the parent's rotation rather than self.
+		@return the parent's rotation
+		"""
+		return self.get_parent().get_rotation()
+
+	def move(self, delta_coor):
+		"""
+		Move the parent rather than self.
+		@param delta_corr the (delta_x, delta_y) tuple
+		"""
+		self.get_parent().move(delta_coor)
+
+	def rotate(self, direction):
+		"""
+		Rotate the parent rather than self.
+		@param direction degrees to rotate
+		"""
+		self.get_parent().rotate(direction)
+
+	def get_coordinate(self):
+		"""
+		Get the parent's coordinate rather than self.
+		@return the parents coordinate
+		"""
+		return self.get_parent().get_coordinate()
+
+	def set_highlighted(self, highlight):
+		"""
+		Set the parent highlight rather than self.
+		@param highlight true to enable highlighting
+		"""
+		self.get_parent().set_highlighted(highlight)
+
+	def is_highlighted(self):
+		"""
+		Get the parent's is highlight rather than self.
+		@return the parent's highlighting status
+		"""
+		return self.get_parent().is_highlighted()