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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
import Utils
import Colors
from .. base import odict
from Constants import BORDER_PROXIMITY_SENSITIVITY
from Constants import \
BLOCK_LABEL_PADDING, \
PORT_SEPARATION, LABEL_SEPARATION, \
PORT_BORDER_SEPARATION, POSSIBLE_ROTATIONS
import pygtk
pygtk.require('2.0')
import gtk
import pango
BLOCK_MARKUP_TMPL="""\
#set $foreground = $block.is_valid() and 'black' or 'red'
<span foreground="$foreground" font_desc="Sans 8"><b>$encode($block.get_name())</b></span>"""
class Block(Element):
"""The graphical signal block."""
def __init__(self):
"""
Block contructor.
Add graphics related params to the block.
"""
#add the position param
self.get_params().append(self.get_parent().get_parent().Param(
block=self,
n=odict({
'name': 'GUI Coordinate',
'key': '_coordinate',
'type': 'raw',
'value': '(0, 0)',
'hide': 'all',
})
))
self.get_params().append(self.get_parent().get_parent().Param(
block=self,
n=odict({
'name': 'GUI Rotation',
'key': '_rotation',
'type': 'raw',
'value': '0',
'hide': 'all',
})
))
Element.__init__(self)
def get_coordinate(self):
"""
Get the coordinate from the position param.
@return the coordinate tuple (x, y) or (0, 0) if failure
"""
try: #should evaluate to tuple
coor = eval(self.get_param('_coordinate').get_value())
x, y = map(int, coor)
fgW,fgH = self.get_parent().get_size()
if x <= 0:
x = 0
elif x >= fgW - BORDER_PROXIMITY_SENSITIVITY:
x = fgW - BORDER_PROXIMITY_SENSITIVITY
if y <= 0:
y = 0
elif y >= fgH - BORDER_PROXIMITY_SENSITIVITY:
y = fgH - BORDER_PROXIMITY_SENSITIVITY
return (x, y)
except:
self.set_coordinate((0, 0))
return (0, 0)
def set_coordinate(self, coor):
"""
Set the coordinate into the position param.
@param coor the coordinate tuple (x, y)
"""
self.get_param('_coordinate').set_value(str(coor))
def get_rotation(self):
"""
Get the rotation from the position param.
@return the rotation in degrees or 0 if failure
"""
try: #should evaluate to dict
rotation = eval(self.get_param('_rotation').get_value())
return int(rotation)
except:
self.set_rotation(POSSIBLE_ROTATIONS[0])
return POSSIBLE_ROTATIONS[0]
def set_rotation(self, rot):
"""
Set the rotation into the position param.
@param rot the rotation in degrees
"""
self.get_param('_rotation').set_value(str(rot))
def create_shapes(self):
"""Update the block, parameters, and ports when a change occurs."""
Element.create_shapes(self)
if self.is_horizontal(): self.add_area((0, 0), (self.W, self.H))
elif self.is_vertical(): self.add_area((0, 0), (self.H, self.W))
def create_labels(self):
"""Create the labels for the signal block."""
Element.create_labels(self)
self._bg_color = self.get_enabled() and Colors.BLOCK_ENABLED_COLOR or Colors.BLOCK_DISABLED_COLOR
layouts = list()
#create the main layout
layout = gtk.DrawingArea().create_pango_layout('')
layouts.append(layout)
layout.set_markup(Utils.parse_template(BLOCK_MARKUP_TMPL, block=self))
self.label_width, self.label_height = layout.get_pixel_size()
#display the params
markups = [param.get_markup() for param in self.get_params() if param.get_hide() not in ('all', 'part')]
if markups:
layout = gtk.DrawingArea().create_pango_layout('')
layout.set_spacing(LABEL_SEPARATION*pango.SCALE)
layout.set_markup('\n'.join(markups))
layouts.append(layout)
w,h = layout.get_pixel_size()
self.label_width = max(w, self.label_width)
self.label_height += h + LABEL_SEPARATION
width = self.label_width
height = self.label_height
#setup the pixmap
pixmap = self.get_parent().new_pixmap(width, height)
gc = pixmap.new_gc()
gc.set_foreground(self._bg_color)
pixmap.draw_rectangle(gc, True, 0, 0, width, height)
#draw the layouts
h_off = 0
for i,layout in enumerate(layouts):
w,h = layout.get_pixel_size()
if i == 0: w_off = (width-w)/2
else: w_off = 0
pixmap.draw_layout(gc, w_off, h_off, layout)
h_off = h + h_off + LABEL_SEPARATION
#create vertical and horizontal pixmaps
self.horizontal_label = pixmap
if self.is_vertical():
self.vertical_label = self.get_parent().new_pixmap(height, width)
Utils.rotate_pixmap(gc, self.horizontal_label, self.vertical_label)
#calculate width and height needed
self.W = self.label_width + 2*BLOCK_LABEL_PADDING
self.H = max(*(
[self.label_height+2*BLOCK_LABEL_PADDING] + [2*PORT_BORDER_SEPARATION + \
sum([port.H + PORT_SEPARATION for port in ports]) - PORT_SEPARATION
for ports in (self.get_sources(), self.get_sinks())]
))
def draw(self, gc, window):
"""
Draw the signal block with label and inputs/outputs.
@param gc the graphics context
@param window the gtk window to draw on
"""
x, y = self.get_coordinate()
#draw main block
Element.draw(
self, gc, window, bg_color=self._bg_color,
border_color=self.is_highlighted() and Colors.HIGHLIGHT_COLOR or Colors.BORDER_COLOR,
)
#draw label image
if self.is_horizontal():
window.draw_drawable(gc, self.horizontal_label, 0, 0, x+BLOCK_LABEL_PADDING, y+(self.H-self.label_height)/2, -1, -1)
elif self.is_vertical():
window.draw_drawable(gc, self.vertical_label, 0, 0, x+(self.H-self.label_height)/2, y+BLOCK_LABEL_PADDING, -1, -1)
#draw ports
for port in self.get_ports(): port.draw(gc, window)
def what_is_selected(self, coor, coor_m=None):
"""
Get the element that is selected.
@param coor the (x,y) tuple
@param coor_m the (x_m, y_m) tuple
@return this block, a port, or None
"""
for port in self.get_ports():
port_selected = port.what_is_selected(coor, coor_m)
if port_selected: return port_selected
return Element.what_is_selected(self, coor, coor_m)
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