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"""
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()
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