--- /dev/null
+"""
+Copyright 2007, 2008 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
+"""
+
+import Utils
+from Element import Element
+import Colors
+from Constants import CONNECTOR_ARROW_BASE, CONNECTOR_ARROW_HEIGHT
+
+class Connection(Element):
+ """
+ A graphical connection for ports.
+ The connection has 2 parts, the arrow and the wire.
+ The coloring of the arrow and wire exposes the status of 3 states:
+ enabled/disabled, valid/invalid, highlighted/non-highlighted.
+ The wire coloring exposes the enabled and highlighted states.
+ The arrow coloring exposes the enabled and valid states.
+ """
+
+ def get_coordinate(self):
+ """
+ Get the 0,0 coordinate.
+ Coordinates are irrelevant in connection.
+ @return 0, 0
+ """
+ return (0, 0)
+
+ def get_rotation(self):
+ """
+ Get the 0 degree rotation.
+ Rotations are irrelevant in connection.
+ @return 0
+ """
+ return 0
+
+ def update(self):
+ """Precalculate relative coordinates."""
+ self._sink_rot = None
+ self._source_rot = None
+ self._sink_coor = None
+ self._source_coor = None
+ #get the source coordinate
+ connector_length = self.get_source().get_connector_length()
+ self.x1, self.y1 = Utils.get_rotated_coordinate((connector_length, 0), self.get_source().get_rotation())
+ #get the sink coordinate
+ connector_length = self.get_sink().get_connector_length() + CONNECTOR_ARROW_HEIGHT
+ self.x2, self.y2 = Utils.get_rotated_coordinate((-connector_length, 0), self.get_sink().get_rotation())
+ #build the arrow
+ self.arrow = [(0, 0),
+ Utils.get_rotated_coordinate((-CONNECTOR_ARROW_HEIGHT, -CONNECTOR_ARROW_BASE/2), self.get_sink().get_rotation()),
+ Utils.get_rotated_coordinate((-CONNECTOR_ARROW_HEIGHT, CONNECTOR_ARROW_BASE/2), self.get_sink().get_rotation()),
+ ]
+ self._update_after_move()
+ if not self.get_enabled(): self._arrow_color = Colors.CONNECTION_DISABLED_COLOR
+ elif not self.is_valid(): self._arrow_color = Colors.CONNECTION_ERROR_COLOR
+ else: self._arrow_color = Colors.CONNECTION_ENABLED_COLOR
+
+ def _update_after_move(self):
+ """Calculate coordinates."""
+ self.clear()
+ #source connector
+ source = self.get_source()
+ X, Y = source.get_connector_coordinate()
+ x1, y1 = self.x1 + X, self.y1 + Y
+ self.add_line((x1, y1), (X, Y))
+ #sink connector
+ sink = self.get_sink()
+ X, Y = sink.get_connector_coordinate()
+ x2, y2 = self.x2 + X, self.y2 + Y
+ self.add_line((x2, y2), (X, Y))
+ #adjust arrow
+ self._arrow = [(x+X, y+Y) for x,y in self.arrow]
+ #add the horizontal and vertical lines in this connection
+ if abs(source.get_connector_direction() - sink.get_connector_direction()) == 180:
+ #2 possible point sets to create a 3-line connector
+ mid_x, mid_y = (x1 + x2)/2.0, (y1 + y2)/2.0
+ points = [((mid_x, y1), (mid_x, y2)), ((x1, mid_y), (x2, mid_y))]
+ #source connector -> points[0][0] should be in the direction of source (if possible)
+ if Utils.get_angle_from_coordinates((x1, y1), points[0][0]) != source.get_connector_direction(): points.reverse()
+ #points[0][0] -> sink connector should not be in the direction of sink
+ if Utils.get_angle_from_coordinates(points[0][0], (x2, y2)) == sink.get_connector_direction(): points.reverse()
+ #points[0][0] -> source connector should not be in the direction of source
+ if Utils.get_angle_from_coordinates(points[0][0], (x1, y1)) == source.get_connector_direction(): points.reverse()
+ #create 3-line connector
+ p1, p2 = map(int, points[0][0]), map(int, points[0][1])
+ self.add_line((x1, y1), p1)
+ self.add_line(p1, p2)
+ self.add_line((x2, y2), p2)
+ else:
+ #2 possible points to create a right-angled connector
+ points = [(x1, y2), (x2, y1)]
+ #source connector -> points[0] should be in the direction of source (if possible)
+ if Utils.get_angle_from_coordinates((x1, y1), points[0]) != source.get_connector_direction(): points.reverse()
+ #points[0] -> sink connector should not be in the direction of sink
+ if Utils.get_angle_from_coordinates(points[0], (x2, y2)) == sink.get_connector_direction(): points.reverse()
+ #points[0] -> source connector should not be in the direction of source
+ if Utils.get_angle_from_coordinates(points[0], (x1, y1)) == source.get_connector_direction(): points.reverse()
+ #create right-angled connector
+ self.add_line((x1, y1), points[0])
+ self.add_line((x2, y2), points[0])
+
+ def draw(self, gc, window):
+ """
+ Draw the connection.
+ @param gc the graphics context
+ @param window the gtk window to draw on
+ """
+ sink = self.get_sink()
+ source = self.get_source()
+ #check for changes
+ if self._sink_rot != sink.get_rotation() or self._source_rot != source.get_rotation(): self.update()
+ elif self._sink_coor != sink.get_coordinate() or self._source_coor != source.get_coordinate(): self._update_after_move()
+ #cache values
+ self._sink_rot = sink.get_rotation()
+ self._source_rot = source.get_rotation()
+ self._sink_coor = sink.get_coordinate()
+ self._source_coor = source.get_coordinate()
+ #draw
+ if self.is_highlighted(): border_color = Colors.HIGHLIGHT_COLOR
+ elif self.get_enabled(): border_color = Colors.CONNECTION_ENABLED_COLOR
+ else: border_color = Colors.CONNECTION_DISABLED_COLOR
+ Element.draw(self, gc, window, bg_color=None, border_color=border_color)
+ #draw arrow on sink port
+ gc.set_foreground(self._arrow_color)
+ window.draw_polygon(gc, True, self._arrow)
projects / debian / gnuradio / blobdiff