214 lines
6.7 KiB
Python
214 lines
6.7 KiB
Python
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from itertools import cycle
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import pyqtgraph as pg
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from numpy import nanmax, nanmin, inf, argsort, where
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try:
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# numpy > 1.19 renamed some integration functions
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from scipy.integrate import cumulative_trapezoid
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except ImportError:
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from scipy.integrate import cumtrapz as cumulative_trapezoid
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from ..Qt import QtWidgets, QtCore, QtGui
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from .._py.integral_widget import Ui_Form
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class IntegralWidget(QtWidgets.QWidget, Ui_Form):
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colors = cycle(['red', 'green', 'blue', 'cyan', 'magenta',
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'darkRed', 'darkGreen', 'darkBlue', 'darkCyan', 'darkMagenta'])
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requestData = QtCore.pyqtSignal(str)
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item_deleted = QtCore.pyqtSignal(pg.GraphicsObject)
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newData = QtCore.pyqtSignal(str, list)
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def __init__(self, parent=None):
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super().__init__(parent=parent)
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self.setupUi(self)
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self.connected_figure = ''
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self.graph_shown = None
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self.shown_set = None
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self._data = None
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self.ranges = []
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self.lines = []
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self.max_area = 0
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self.max_y = inf
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self.min_y = -inf
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def __call__(self, graph_name, items):
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self.label_2.setText(f'Connected to <b>{graph_name}</b>')
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self.clear()
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self.set_combobox.blockSignals(True)
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self.set_combobox.clear()
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for sid, name in items:
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self.set_combobox.addItem(name, userData=sid)
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self.set_combobox.blockSignals(False)
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self.set_combobox.setCurrentIndex(0)
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self.set_combobox.currentIndexChanged.emit(0)
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return self
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def keyPressEvent(self, e):
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if e.key() == QtCore.Qt.Key_Delete:
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self.remove_integral()
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else:
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super().keyPressEvent(e)
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@QtCore.pyqtSlot(int, name='on_set_combobox_currentIndexChanged')
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def change_set(self, idx: int):
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key = self.set_combobox.itemData(idx)
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self.requestData.emit(key)
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def set_data(self, ptr):
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self._data = ptr
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self.max_y = nanmax(self._data.y.real)
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self.min_y = nanmin(self._data.y.real)
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for idx, rnge in enumerate(self.ranges):
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self._update_values(idx, rnge)
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def add(self, pos):
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x = pos[0]
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self.ranges.append((x, x * 1.1))
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c = next(IntegralWidget.colors)
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qc = QtGui.QColor(c)
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qc.setAlpha(40)
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region = pg.LinearRegionItem(values=[x, x*1.1], brush=QtGui.QBrush(qc), pen=pg.mkPen(QtGui.QColor(c)))
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integral_plot = pg.PlotDataItem(x=[], y=[])
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region.sigRegionChanged.connect(self._update_integral)
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self.lines.append((region, integral_plot))
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self.areas.append(0)
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self._make_entry(c)
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return region, integral_plot
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def _make_entry(self, c):
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item = QtWidgets.QTreeWidgetItem()
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item.setText(0, f'Integral {len(self.ranges)}')
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item.setForeground(0, QtGui.QBrush(QtGui.QColor(c)))
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pts_i = self.ranges[-1]
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item_list = []
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for text, val in [('Start', pts_i[0]), ('Stop', pts_i[1]), ('Areas', 0), ('Ratio', 1.)]:
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child = QtWidgets.QTreeWidgetItem()
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child.setFlags(QtCore.Qt.NoItemFlags)
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child.setText(0, f'{text}: {val:.5g}')
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child.setForeground(0, QtGui.QBrush(QtGui.QColor('black')))
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item_list.append(child)
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item.addChildren(item_list)
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self.treeWidget.addTopLevelItem(item)
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self.treeWidget.expandToDepth(1)
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self._update_values(len(self.ranges) - 1, pts_i)
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def _update_integral(self):
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idx = None
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sender = self.sender()
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for i, (reg, _) in enumerate(self.lines):
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if sender == reg:
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idx = i
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break
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if idx is None:
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return
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self._update_values(idx, sender.getRegion())
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def _update_values(self, idx, new_range):
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self.ranges[idx] = new_range
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area = self.calc_integral(idx, *new_range)
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item = self.treeWidget.topLevelItem(idx)
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item.child(0).setText(0, f'Start: {new_range[0]:.5g}')
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item.child(1).setText(0, f'Stop: {new_range[1]:.5g}')
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if area is not None:
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self.areas[idx] = area
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item.child(2).setText(0, f'Area: {area:.5g}')
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if self.max_area > 0:
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self._set_ratios(idx, self.max_area)
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curr_max = max(self.areas)
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if curr_max != self.max_area:
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if curr_max > 0:
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root = self.treeWidget.invisibleRootItem()
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for i in range(root.childCount()):
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self._set_ratios(i, curr_max)
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self.max_area = curr_max
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def _set_ratios(self, idx, max_value):
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item = self.treeWidget.invisibleRootItem().child(idx)
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area_i = self.areas[idx]
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item.child(3).setText(0, f'Ratio: {area_i / max_value:.3g}')
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integral_line = self.lines[idx][1]
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x_i, y_i = integral_line.getData()
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scale = (self.max_y - self.min_y) / y_i[-1] * (area_i / max_value)
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integral_line.setData(x=x_i, y=y_i * scale)
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def calc_integral(self, idx, x_min, x_max):
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int_range = where((self._data.x >= x_min) & (self._data.x <= x_max))[0]
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if len(int_range) > 1:
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x_int = self._data.x[int_range]
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y_int = self._data.y[int_range].real
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order = argsort(x_int)
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integral = cumulative_trapezoid(y=y_int[order], x=x_int[order], initial=0)
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scale = (self.max_y-self.min_y) / integral[-1]
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self.lines[idx][1].setData(x=x_int[order], y=integral*scale + self.min_y)
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return integral[-1]
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else:
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self.lines[idx][1].setData(x=[], y=[])
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return None
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def remove_integral(self):
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root = self.treeWidget.invisibleRootItem()
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for item in self.treeWidget.selectedItems():
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idx = root.indexOfChild(item)
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self.ranges.pop(idx)
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self.item_deleted.emit(self.lines[idx][0])
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self.item_deleted.emit(self.lines[idx][1])
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self.lines.pop(idx)
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self.areas.pop(idx)
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self.treeWidget.takeTopLevelItem(idx)
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@QtCore.pyqtSlot(name='on_pushButton_clicked')
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def convert_to_datasets(self):
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set_id = self.set_combobox.currentData()
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values = []
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for i in range(len(self.ranges)):
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x_i, y_i = self.lines[i][1].getData()
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start_i, stop_i = self.ranges[i]
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area_i = self.areas[i]
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values.append((x_i, y_i, start_i, stop_i, area_i))
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self.newData.emit(set_id, values)
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def clear(self):
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self.connected_figure = ''
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self.graph_shown = None
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self.shown_set = None
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self._data = None
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self.ranges = []
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self.lines = []
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self.max_area = 0
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self.max_y = inf
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self.min_y = -inf
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