From fef76c211cbe6a6c7c0645c181d27635971d841b Mon Sep 17 00:00:00 2001
From: Paul Cercueil <paul.cercueil@analog.com>
Date: Tue, 21 Jun 2016 18:16:06 +0200
Subject: gr-qtgui: Fix range.py to work with both Qt4 and Qt5
Signed-off-by: Paul Cercueil <paul.cercueil@analog.com>
---
gr-qtgui/python/qtgui/range.py.cmakein | 258 +++++++++++++++++++++++++++++++++
1 file changed, 258 insertions(+)
create mode 100755 gr-qtgui/python/qtgui/range.py.cmakein
(limited to 'gr-qtgui/python/qtgui/range.py.cmakein')
diff --git a/gr-qtgui/python/qtgui/range.py.cmakein b/gr-qtgui/python/qtgui/range.py.cmakein
new file mode 100755
index 0000000000..45aa762ae3
--- /dev/null
+++ b/gr-qtgui/python/qtgui/range.py.cmakein
@@ -0,0 +1,258 @@
+#!/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.
+#
+
+@PY_QT_IMPORT@
+
+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):
+ # Get the decimal part of the step
+ temp = str(float(self.step) - int(self.step))[2:]
+ precision = len(temp) if temp is not '0' else 0
+ precision = min(precision, 13)
+
+ if precision == 0 and self.max < 100:
+ self.precision = 1 # Always have a decimal in this case
+ else:
+ self.precision = (precision + 2) if precision > 0 else 0
+
+ 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(QtWidgets.QWidget):
+ def __init__(self, ranges, slot, label, style, rangeType=float):
+ """ Creates the QT Range widget """
+ QtWidgets.QWidget.__init__(self)
+
+ self.range = ranges
+ self.style = style
+
+ # rangeType tells the block how to return the value as a standard
+ self.rangeType = rangeType
+
+ # Top-block function to call when any value changes
+ # Some widgets call this directly when their value changes.
+ # Others have intermediate functions to map the value into the right range.
+ self.notifyChanged = slot
+
+ layout = Qt.QHBoxLayout()
+ label = Qt.QLabel(label)
+ layout.addWidget(label)
+
+ if style == "dial":
+ self.d_widget = self.Dial(self, self.range, self.notifyChanged, rangeType)
+ elif style == "slider":
+ self.d_widget = self.Slider(self, self.range, self.notifyChanged, rangeType)
+ elif style == "counter":
+ # The counter widget can be directly wired to the notifyChanged slot
+ self.d_widget = self.Counter(self, self.range, self.notifyChanged, rangeType)
+ else:
+ # The CounterSlider needs its own internal handlers before calling notifyChanged
+ self.d_widget = self.CounterSlider(self, self.range, self.notifyChanged, rangeType)
+
+ layout.addWidget(self.d_widget)
+ self.setLayout(layout)
+
+ class Dial(QtWidgets.QDial):
+ """ Creates the range using a dial """
+ def __init__(self, parent, ranges, slot, rangeType=float):
+ QtWidgets.QDial.__init__(self, parent)
+
+ self.rangeType = rangeType
+
+ # Setup the dial
+ self.setRange(0, ranges.nsteps-1)
+ self.setSingleStep(1)
+ self.setNotchesVisible(True)
+ self.range = ranges
+
+ # Round the initial value to the closest tick
+ temp = int(round(ranges.demap_range(ranges.default), 0))
+ self.setValue(temp)
+
+ # Setup the slots
+ self.valueChanged.connect(self.changed)
+ self.notifyChanged = slot
+
+ def changed(self, value):
+ """ Handles maping the value to the right range before calling the slot. """
+ val = self.range.map_range(value)
+ self.notifyChanged(self.rangeType(val))
+
+ class Slider(QtWidgets.QSlider):
+ """ Creates the range using a slider """
+ def __init__(self, parent, ranges, slot, rangeType=float):
+ QtWidgets.QSlider.__init__(self, QtCore.Qt.Horizontal, parent)
+
+ self.rangeType = rangeType
+
+ # Setup the slider
+ #self.setFocusPolicy(QtCore.Qt.NoFocus)
+ self.setRange(0, ranges.nsteps - 1)
+ self.setTickPosition(2)
+ self.setSingleStep(1)
+ self.range = ranges
+
+ # Round the initial value to the closest tick
+ temp = int(round(ranges.demap_range(ranges.default), 0))
+ self.setValue(temp)
+
+ if ranges.nsteps > ranges.min_length:
+ interval = int(ranges.nsteps/ranges.min_length)
+ self.setTickInterval(interval)
+ self.setPageStep(interval)
+ else:
+ self.setTickInterval(1)
+ self.setPageStep(1)
+
+ # Setup the handler function
+ self.valueChanged.connect(self.changed)
+ self.notifyChanged = slot
+
+ def changed(self, value):
+ """ Handle the valueChanged signal and map the value into the correct range """
+ val = self.range.map_range(value)
+ self.notifyChanged(self.rangeType(val))
+
+ def mousePressEvent(self, event):
+ if((event.button() == QtCore.Qt.LeftButton)):
+ new = self.minimum() + ((self.maximum()-self.minimum()) * event.x()) / self.width()
+ self.setValue(new)
+ event.accept()
+ # Use repaint rather than calling the super mousePressEvent.
+ # Calling super causes issue where slider jumps to wrong value.
+ QtWidgets.QSlider.repaint(self)
+
+ def mouseMoveEvent(self, event):
+ new = self.minimum() + ((self.maximum()-self.minimum()) * event.x()) / self.width()
+ self.setValue(new)
+ event.accept()
+ QtWidgets.QSlider.repaint(self)
+
+ class Counter(QtWidgets.QDoubleSpinBox):
+ """ Creates the range using a counter """
+ def __init__(self, parent, ranges, slot, rangeType=float):
+ QtWidgets.QDoubleSpinBox.__init__(self, parent)
+
+ self.rangeType = rangeType
+
+ # Setup the counter
+ self.setRange(ranges.min, ranges.max)
+ self.setValue(ranges.default)
+ self.setSingleStep(ranges.step)
+ self.setKeyboardTracking(False)
+ self.setDecimals(ranges.precision)
+
+ # The counter already handles floats and can be connected directly.
+ self.valueChanged.connect(self.changed)
+ self.notifyChanged = slot
+
+ def changed(self, value):
+ """ Handle the valueChanged signal by converting to the right type """
+ self.notifyChanged(self.rangeType(value))
+
+ class CounterSlider(QtWidgets.QWidget):
+ """ Creates the range using a counter and slider """
+ def __init__(self, parent, ranges, slot, rangeType=float):
+ QtWidgets.QWidget.__init__(self, parent)
+
+ self.rangeType = rangeType
+
+ # Slot to call in the parent
+ self.notifyChanged = slot
+
+ self.slider = RangeWidget.Slider(parent, ranges, self.sliderChanged, rangeType)
+ self.counter = RangeWidget.Counter(parent, ranges, self.counterChanged, rangeType)
+
+ # Need another horizontal layout to wrap the other widgets.
+ layout = Qt.QHBoxLayout()
+ layout.addWidget(self.slider)
+ layout.addWidget(self.counter)
+ self.setLayout(layout)
+
+ # Flag to ignore the slider event caused by a change to the counter.
+ self.ignoreSlider = False
+ self.range = ranges
+
+ def sliderChanged(self, value):
+ """ Handles changing the counter when the slider is updated """
+ # If the counter was changed, ignore any of these events
+ if not self.ignoreSlider:
+ # Value is already float. Just set the counter
+ self.counter.setValue(self.rangeType(value))
+ self.notifyChanged(self.rangeType(value))
+ self.ignoreSlider = False
+
+ def counterChanged(self, value):
+ """ Handles changing the slider when the counter is updated """
+ # Get the current slider value and check to see if the new value changes it
+ current = self.slider.value()
+ new = int(round(self.range.demap_range(value), 0))
+
+ # If it needs to change, ignore the slider event
+ # Otherwise, the slider will cause the counter to round to the nearest tick
+ if current != new:
+ self.ignoreSlider = True
+ self.slider.setValue(new)
+
+ self.notifyChanged(self.rangeType(value))
+
+
+if __name__ == "__main__":
+ from PyQt4 import Qt
+ import sys
+
+ def valueChanged(frequency):
+ print("Value updated - " + str(frequency))
+
+ app = Qt.QApplication(sys.argv)
+ widget = RangeWidget(Range(0, 100, 10, 1, 100), valueChanged, "Test", "counter_slider", int)
+
+ widget.show()
+ widget.setWindowTitle("Test Qt Range")
+ app.exec_()
+
+ widget = None
--
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