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#!/usr/bin/env python
# -*- coding: utf-8 -*-
#
# Copyright 2015 Free Software Foundation, Inc.
#
# This file is part of GNU Radio
#
# GNU Radio 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 3, or (at your option)
# any later version.
#
# GNU Radio 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 GNU Radio; see the file COPYING. If not, write to
# the Free Software Foundation, Inc., 51 Franklin Street,
# Boston, MA 02110-1301, USA.
#
from PyQt4 import Qt, QtCore, QtGui
class Range(object):
def __init__(self, minv, maxv, step, default, min_length):
self.min = float(minv)
self.max = float(maxv)
self.step = float(step)
self.default = float(default)
self.min_length = min_length
self.find_precision()
self.find_nsteps()
def find_precision(self):
temp = str(float(self.step)-int(self.step))[2:]
if len(temp) > 13:
self.precision = 15
else:
self.precision = len(temp)+2
def find_nsteps(self):
self.nsteps = (self.max + self.step - self.min)/self.step
def demap_range(self,val):
if val > self.max:
val = self.max
if val < self.min:
val = self.min
return ((val-self.min)/self.step)
def map_range(self,val):
if val > self.nsteps:
val = self.max
if val < 0:
val = 0
return (val*self.step+self.min)
class RangeWidget(QtGui.QWidget):
def __init__(self, ranges, slot, label, style):
""" Creates the QT Range widget """
QtGui.QWidget.__init__(self)
self.range = ranges
self.slot = slot
self.style = style
layout = Qt.QHBoxLayout()
label = Qt.QLabel(label)
layout.addWidget(label)
if style == "dial":
self.d_widget = self.Dial(self, self.range, self.ds_modified_slot)
elif style == "slider":
self.d_widget = self.Slider(self, self.range, self.ds_modified_slot)
elif style == "counter":
self.d_widget = self.Counter(self, self.range, self.c_modified_slot)
elif style == "counter_slider":
self.d_widget = self.CounterSlider(self, self.range, self.ds_modified_slot, self.c_modified_slot)
else:
self.d_widget = self.CounterSlider(self, self.range, self.ds_modified_slot, self.c_modified_slot)
layout.addWidget(self.d_widget)
self.setLayout(layout)
def ds_modified_slot(self,val):
nval = self.range.map_range(val)
self.slot(nval)
if self.style == "counter_slider":
self.d_widget.set_counter(nval)
def c_modified_slot(self,val):
self.slot(val)
if self.style == "counter_slider":
temp = self.range.demap_range(val)
if temp-int(temp) >= 0.5:
self.d_widget.set_slider(int(temp)+1)
else:
self.d_widget.set_slider(int(temp))
class Dial(QtGui.QDial):
""" Creates the range using a dial """
def __init__(self, parent, ranges, slot):
QtGui.QDial.__init__(self, parent)
self.setRange(0, ranges.nsteps-1)
self.setSingleStep(1)
self.setNotchesVisible(True)
temp = ranges.demap_range(ranges.default)
if temp-int(temp) >= 0.5:
temp = int(temp)+1
else:
temp = int(temp)
self.setValue(temp)
self.valueChanged.connect(slot)
class Slider(QtGui.QSlider):
""" Creates the range using a slider """
def __init__(self, parent, ranges, slot):
QtGui.QSlider.__init__(self, QtCore.Qt.Horizontal, parent)
self.setFocusPolicy(QtCore.Qt.NoFocus)
self.setRange(0, ranges.nsteps-1)
temp = ranges.demap_range(ranges.default)
if temp-int(temp) >= 0.5:
temp = int(temp)+1
else:
temp = int(temp)
self.setValue(temp)
self.setPageStep(1)
self.setSingleStep(1)
self.setTickPosition(2)
if ranges.nsteps > ranges.min_length:
self.setTickInterval(int(ranges.nsteps/ranges.min_length))
else:
self.setTickInterval(1)
self.valueChanged.connect(slot)
def mousePressEvent(self, event):
if((event.button() == QtCore.Qt.LeftButton)):
newVal = self.minimum() + ((self.maximum()-self.minimum()) * event.x()) / self.width()
self.setValue(newVal)
event.accept()
QtGui.QSlider.mousePressEvent(self, event)
class Counter(QtGui.QDoubleSpinBox):
""" Creates the range using a counter """
def __init__(self, parent, ranges, slot):
QtGui.QDoubleSpinBox.__init__(self, parent)
self.setRange(ranges.min, ranges.max)
self.setValue(ranges.default)
self.setSingleStep(ranges.step)
self.setKeyboardTracking(False)
self.setDecimals(ranges.precision)
self.valueChanged.connect(slot)
class CounterSlider(QtGui.QWidget):
""" Creates the range using a counter and slider """
def __init__(self, parent, ranges, s_slot, c_slot):
QtGui.QWidget.__init__(self, parent)
# Need another horizontal layout
layout = Qt.QHBoxLayout()
# Create a slider with the top-level widget as the parent
self.slider = RangeWidget.Slider(parent,ranges,s_slot)
layout.addWidget(self.slider)
# Setup the counter
self.counter = RangeWidget.Counter(parent,ranges,c_slot)
layout.addWidget(self.counter)
# Wire the events to each other
#counter.valueChanged.connect(slider.setValue)
#slider.valueChanged.connect(counter.setValue)
self.counter.valueChanged.connect(c_slot)
self.slider.valueChanged.connect(s_slot)
self.setLayout(layout)
def set_slider(self,val):
self.slider.setValue(val)
def set_counter(self,val):
self.counter.setValue(val)
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