Article Outline
Python pyqt (gui) example 'ChartThemes'
Modules used in program:
import random
ChartThemes
Python pyqt example: ChartThemes
#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""
Created on 2019/10/2
@author: Irony
@site: https://pyqt5.com , https://github.com/892768447
@email: [email protected]
@file: ChartThemes
@description: 图表主题动画等
"""
#############################################################################
##
## Copyright (C) 2013 Riverbank Computing Limited
## Copyright (C) 2012 Digia Plc
## All rights reserved.
##
## This file is part of the PyQtChart examples.
##
## $QT_BEGIN_LICENSE$
## Licensees holding valid Qt Commercial licenses may use this file in
## accordance with the Qt Commercial License Agreement provided with the
## Software or, alternatively, in accordance with the terms contained in
## a written agreement between you and Digia.
## $QT_END_LICENSE$
##
#############################################################################
import random
from PyQt5.QtChart import (QAreaSeries, QBarSet, QChart, QChartView,
QLineSeries, QPieSeries, QScatterSeries, QSplineSeries,
QStackedBarSeries)
from PyQt5.QtCore import pyqtSlot, QPointF, Qt
from PyQt5.QtGui import QColor, QPainter, QPalette
from PyQt5.QtWidgets import (QCheckBox, QComboBox, QGridLayout, QHBoxLayout,
QLabel, QSizePolicy, QWidget)
class ThemeWidget(QWidget):
def __init__(self, parent=None):
super(ThemeWidget, self).__init__(parent)
self.m_charts = []
self.m_listCount = 3
self.m_valueMax = 10
self.m_valueCount = 7
self.m_dataTable = self.generateRandomData(self.m_listCount,
self.m_valueMax, self.m_valueCount)
self.m_themeComboBox = self.createThemeBox()
self.m_antialiasCheckBox = QCheckBox("Anti-aliasing")
self.m_animatedComboBox = self.createAnimationBox()
self.m_legendComboBox = self.createLegendBox()
self.connectSignals()
# Create the layout.
baseLayout = QGridLayout()
settingsLayout = QHBoxLayout()
settingsLayout.addWidget(QLabel("Theme:"))
settingsLayout.addWidget(self.m_themeComboBox)
settingsLayout.addWidget(QLabel("Animation:"))
settingsLayout.addWidget(self.m_animatedComboBox)
settingsLayout.addWidget(QLabel("Legend:"))
settingsLayout.addWidget(self.m_legendComboBox)
settingsLayout.addWidget(self.m_antialiasCheckBox)
settingsLayout.addStretch()
baseLayout.addLayout(settingsLayout, 0, 0, 1, 3)
# Create the charts.
chartView = QChartView(self.createAreaChart())
baseLayout.addWidget(chartView, 1, 0)
self.m_charts.append(chartView)
chartView = QChartView(self.createBarChart(self.m_valueCount))
baseLayout.addWidget(chartView, 1, 1)
self.m_charts.append(chartView)
chartView = QChartView(self.createLineChart())
baseLayout.addWidget(chartView, 1, 2)
self.m_charts.append(chartView)
chartView = QChartView(self.createPieChart())
# Funny things happen if the pie slice labels no not fit the screen...
chartView.setSizePolicy(QSizePolicy.Ignored, QSizePolicy.Ignored)
baseLayout.addWidget(chartView, 2, 0)
self.m_charts.append(chartView)
chartView = QChartView(self.createSplineChart())
baseLayout.addWidget(chartView, 2, 1)
self.m_charts.append(chartView)
chartView = QChartView(self.createScatterChart())
baseLayout.addWidget(chartView, 2, 2)
self.m_charts.append(chartView)
self.setLayout(baseLayout)
# Set the defaults.
self.m_antialiasCheckBox.setChecked(True)
self.updateUI()
def connectSignals(self):
self.m_themeComboBox.currentIndexChanged.connect(self.updateUI)
self.m_antialiasCheckBox.toggled.connect(self.updateUI)
self.m_animatedComboBox.currentIndexChanged.connect(self.updateUI)
self.m_legendComboBox.currentIndexChanged.connect(self.updateUI)
def generateRandomData(self, listCount, valueMax, valueCount):
random.seed()
dataTable = []
for i in range(listCount):
dataList = []
yValue = 0.0
f_valueCount = float(valueCount)
for j in range(valueCount):
yValue += random.uniform(0, valueMax) / f_valueCount
value = QPointF(
j + random.random() * self.m_valueMax / f_valueCount,
yValue)
label = "Slice " + str(i) + ":" + str(j)
dataList.append((value, label))
dataTable.append(dataList)
return dataTable
def createThemeBox(self):
themeComboBox = QComboBox()
themeComboBox.addItem("Light", QChart.ChartThemeLight)
themeComboBox.addItem("Blue Cerulean", QChart.ChartThemeBlueCerulean)
themeComboBox.addItem("Dark", QChart.ChartThemeDark)
themeComboBox.addItem("Brown Sand", QChart.ChartThemeBrownSand)
themeComboBox.addItem("Blue NCS", QChart.ChartThemeBlueNcs)
themeComboBox.addItem("High Contrast", QChart.ChartThemeHighContrast)
themeComboBox.addItem("Blue Icy", QChart.ChartThemeBlueIcy)
return themeComboBox
def createAnimationBox(self):
animationComboBox = QComboBox()
animationComboBox.addItem("No Animations", QChart.NoAnimation)
animationComboBox.addItem("GridAxis Animations", QChart.GridAxisAnimations)
animationComboBox.addItem("Series Animations", QChart.SeriesAnimations)
animationComboBox.addItem("All Animations", QChart.AllAnimations)
return animationComboBox
def createLegendBox(self):
legendComboBox = QComboBox()
legendComboBox.addItem("No Legend ", 0)
legendComboBox.addItem("Legend Top", Qt.AlignTop)
legendComboBox.addItem("Legend Bottom", Qt.AlignBottom)
legendComboBox.addItem("Legend Left", Qt.AlignLeft)
legendComboBox.addItem("Legend Right", Qt.AlignRight)
return legendComboBox
def createAreaChart(self):
chart = QChart()
chart.setTitle("Area chart")
# The lower series is initialized to zero values.
lowerSeries = None
y_points = []
for i, data_list in enumerate(self.m_dataTable):
upperSeries = QLineSeries(chart)
for j, (value, _) in enumerate(data_list):
y = value.y()
if lowerSeries is None:
upperSeries.append(QPointF(j, y))
y_points.append(y)
else:
new_y = y_points[i] + y
upperSeries.append(QPointF(j, new_y))
y_points[j] += new_y
area = QAreaSeries(upperSeries, lowerSeries)
area.setName("Series " + str(i))
chart.addSeries(area)
lowerSeries = upperSeries
chart.createDefaultAxes()
return chart
def createBarChart(self, valueCount):
chart = QChart()
chart.setTitle("Bar chart")
series = QStackedBarSeries(chart)
for i, data_list in enumerate(self.m_dataTable):
set = QBarSet("Bar set " + str(i))
for value, _ in data_list:
set << value.y()
series.append(set)
chart.addSeries(series)
chart.createDefaultAxes()
return chart
def createLineChart(self):
chart = QChart()
chart.setTitle("Line chart")
for i, data_list in enumerate(self.m_dataTable):
series = QLineSeries(chart)
for value, _ in data_list:
series.append(value)
series.setName("Series " + str(i))
chart.addSeries(series)
chart.createDefaultAxes()
return chart
def createPieChart(self):
chart = QChart()
chart.setTitle("Pie chart")
pieSize = 1.0 / len(self.m_dataTable)
for i, data_list in enumerate(self.m_dataTable):
series = QPieSeries(chart)
for value, label in data_list:
slice = series.append(label, value.y())
if len(series) == 1:
slice.setLabelVisible()
slice.setExploded()
hPos = (pieSize / 2) + (i / float(len(self.m_dataTable)))
series.setPieSize(pieSize)
series.setHorizontalPosition(hPos)
series.setVerticalPosition(0.5)
chart.addSeries(series)
return chart
def createSplineChart(self):
chart = QChart()
chart.setTitle("Spline chart")
for i, data_list in enumerate(self.m_dataTable):
series = QSplineSeries(chart)
for value, _ in data_list:
series.append(value)
series.setName("Series " + str(i))
chart.addSeries(series)
chart.createDefaultAxes()
return chart
def createScatterChart(self):
chart = QChart()
chart.setTitle("Scatter chart")
for i, data_list in enumerate(self.m_dataTable):
series = QScatterSeries(chart)
for value, _ in data_list:
series.append(value)
series.setName("Series " + str(i))
chart.addSeries(series)
chart.createDefaultAxes()
return chart
@pyqtSlot()
def updateUI(self):
theme = self.m_themeComboBox.itemData(
self.m_themeComboBox.currentIndex())
if self.m_charts[0].chart().theme() != theme:
for chartView in self.m_charts:
chartView.chart().setTheme(theme)
pal = self.window().palette()
if theme == QChart.ChartThemeLight:
pal.setColor(QPalette.Window, QColor(0xf0f0f0))
pal.setColor(QPalette.WindowText, QColor(0x404044))
elif theme == QChart.ChartThemeDark:
pal.setColor(QPalette.Window, QColor(0x121218))
pal.setColor(QPalette.WindowText, QColor(0xd6d6d6))
elif theme == QChart.ChartThemeBlueCerulean:
pal.setColor(QPalette.Window, QColor(0x40434a))
pal.setColor(QPalette.WindowText, QColor(0xd6d6d6))
elif theme == QChart.ChartThemeBrownSand:
pal.setColor(QPalette.Window, QColor(0x9e8965))
pal.setColor(QPalette.WindowText, QColor(0x404044))
elif theme == QChart.ChartThemeBlueNcs:
pal.setColor(QPalette.Window, QColor(0x018bba))
pal.setColor(QPalette.WindowText, QColor(0x404044))
elif theme == QChart.ChartThemeHighContrast:
pal.setColor(QPalette.Window, QColor(0xffab03))
pal.setColor(QPalette.WindowText, QColor(0x181818))
elif theme == QChart.ChartThemeBlueIcy:
pal.setColor(QPalette.Window, QColor(0xcee7f0))
pal.setColor(QPalette.WindowText, QColor(0x404044))
else:
pal.setColor(QPalette.Window, QColor(0xf0f0f0))
pal.setColor(QPalette.WindowText, QColor(0x404044))
self.window().setPalette(pal)
checked = self.m_antialiasCheckBox.isChecked()
for chartView in self.m_charts:
chartView.setRenderHint(QPainter.Antialiasing, checked)
options = QChart.AnimationOptions(
self.m_animatedComboBox.itemData(
self.m_animatedComboBox.currentIndex()))
if self.m_charts[0].chart().animationOptions() != options:
for chartView in self.m_charts:
chartView.chart().setAnimationOptions(options)
alignment = self.m_legendComboBox.itemData(
self.m_legendComboBox.currentIndex())
for chartView in self.m_charts:
legend = chartView.chart().legend()
if alignment == 0:
legend.hide()
else:
legend.setAlignment(Qt.Alignment(alignment))
legend.show()
if __name__ == '__main__':
import sys
from PyQt5.QtWidgets import QApplication, QMainWindow
app = QApplication(sys.argv)
window = QMainWindow()
widget = ThemeWidget()
window.setCentralWidget(widget)
window.resize(900, 600)
window.show()
sys.exit(app.exec_())
Useful links
- Learn PyQt: https://pythonbasics.org/pyqt-hello-world/
- Install PyQt: https://pythonbasics.org/install-pyqt/