2 Copyright 2007 Free Software Foundation, Inc.
3 This file is part of GNU Radio
5 GNU Radio Companion is free software; you can redistribute it and/or
6 modify it under the terms of the GNU General Public License
7 as published by the Free Software Foundation; either version 2
8 of the License, or (at your option) any later version.
10 GNU Radio Companion is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
20 from Element import Element
23 from ... gui.Constants import BORDER_PROXIMITY_SENSITIVITY
24 from Constants import \
25 BLOCK_FONT, BLOCK_LABEL_PADDING, \
26 PORT_SEPARATION, LABEL_SEPARATION, \
27 PORT_BORDER_SEPARATION, POSSIBLE_ROTATIONS
34 """The graphical signal block."""
36 def __init__(self, *args, **kwargs):
39 Add graphics related params to the block.
41 #add the position param
42 self._params['_coordinate'] = self.get_parent().get_parent().Param(
45 'name': 'GUI Coordinate',
52 self._params['_rotation'] = self.get_parent().get_parent().Param(
55 'name': 'GUI Rotation',
62 Element.__init__(self)
64 def get_coordinate(self):
66 Get the coordinate from the position param.
67 @return the coordinate tuple (x, y) or (0, 0) if failure
69 try: #should evaluate to tuple
70 coor = eval(self.get_param('_coordinate').get_value())
72 fgW,fgH = self.get_parent().get_size()
75 elif x >= fgW - BORDER_PROXIMITY_SENSITIVITY:
76 x = fgW - BORDER_PROXIMITY_SENSITIVITY
79 elif y >= fgH - BORDER_PROXIMITY_SENSITIVITY:
80 y = fgH - BORDER_PROXIMITY_SENSITIVITY
83 self.set_coordinate((0, 0))
86 def set_coordinate(self, coor):
88 Set the coordinate into the position param.
89 @param coor the coordinate tuple (x, y)
91 self.get_param('_coordinate').set_value(str(coor))
93 def get_rotation(self):
95 Get the rotation from the position param.
96 @return the rotation in degrees or 0 if failure
98 try: #should evaluate to dict
99 rotation = eval(self.get_param('_rotation').get_value())
102 self.set_rotation(POSSIBLE_ROTATIONS[0])
103 return POSSIBLE_ROTATIONS[0]
105 def set_rotation(self, rot):
107 Set the rotation into the position param.
108 @param rot the rotation in degrees
110 self.get_param('_rotation').set_value(str(rot))
113 """Update the block, parameters, and ports when a change occurs."""
114 self.bg_color = self.get_enabled() and Colors.BG_COLOR or Colors.DISABLED_BG_COLOR
116 self._create_labels()
117 self.W = self.label_width + 2*BLOCK_LABEL_PADDING
119 [self.label_height+2*BLOCK_LABEL_PADDING] + [2*PORT_BORDER_SEPARATION + \
120 sum([port.H + PORT_SEPARATION for port in ports]) - PORT_SEPARATION
121 for ports in (self.get_sources(), self.get_sinks())]
123 if self.is_horizontal(): self.add_area((0, 0), (self.W, self.H))
124 elif self.is_vertical(): self.add_area((0, 0), (self.H, self.W))
125 map(lambda p: p.update(), self.get_ports())
127 def _create_labels(self):
128 """Create the labels for the signal block."""
130 #create the main layout
131 layout = gtk.DrawingArea().create_pango_layout('')
132 layouts.append(layout)
133 if self.is_valid(): layout.set_markup('<b>'+Utils.xml_encode(self.get_name())+'</b>')
134 else: layout.set_markup('<span foreground="red"><b>'+Utils.xml_encode(self.get_name())+'</b></span>')
135 desc = pango.FontDescription(BLOCK_FONT)
136 layout.set_font_description(desc)
137 self.label_width, self.label_height = layout.get_pixel_size()
139 for param in filter(lambda p: p.get_hide() not in ('all', 'part'), self.get_params()):
140 layout = param.get_layout()
141 layouts.append(layout)
142 w,h = layout.get_pixel_size()
143 self.label_width = max(w, self.label_width)
144 self.label_height = self.label_height + h + LABEL_SEPARATION
145 width = self.label_width
146 height = self.label_height
148 pixmap = gtk.gdk.Pixmap(self.get_parent().get_window(), width, height, -1)
150 gc.foreground = self.bg_color
151 pixmap.draw_rectangle(gc, True, 0, 0, width, height)
152 gc.foreground = Colors.TXT_COLOR
155 for i,layout in enumerate(layouts):
156 w,h = layout.get_pixel_size()
157 if i == 0: w_off = (width-w)/2
159 pixmap.draw_layout(gc, w_off, h_off, layout)
160 h_off = h + h_off + LABEL_SEPARATION
161 #create vertical and horizontal images
162 self.horizontal_label = image = pixmap.get_image(0, 0, width, height)
163 if self.is_vertical():
164 self.vertical_label = vimage = gtk.gdk.Image(gtk.gdk.IMAGE_NORMAL, pixmap.get_visual(), height, width)
165 for i in range(width):
166 for j in range(height): vimage.put_pixel(j, width-i-1, image.get_pixel(i, j))
167 map(lambda p: p._create_labels(), self.get_ports())
169 def draw(self, window):
171 Draw the signal block with label and inputs/outputs.
172 @param window the gtk window to draw on
174 x, y = self.get_coordinate()
176 Element.draw(self, window, BG_color=self.bg_color)
179 if self.is_horizontal():
180 window.draw_image(gc, self.horizontal_label, 0, 0, x+BLOCK_LABEL_PADDING, y+(self.H-self.label_height)/2, -1, -1)
181 elif self.is_vertical():
182 window.draw_image(gc, self.vertical_label, 0, 0, x+(self.H-self.label_height)/2, y+BLOCK_LABEL_PADDING, -1, -1)
184 map(lambda p: p.draw(window), self.get_ports())
186 def what_is_selected(self, coor, coor_m=None):
188 Get the element that is selected.
189 @param coor the (x,y) tuple
190 @param coor_m the (x_m, y_m) tuple
191 @return this block, a port, or None
193 for port in self.get_ports():
194 port_selected = port.what_is_selected(coor, coor_m)
195 if port_selected: return port_selected
196 return Element.what_is_selected(self, coor, coor_m)