diff --git a/QtChart/README.md b/QtChart/README.md index 6d6974f..8330a7a 100644 --- a/QtChart/README.md +++ b/QtChart/README.md @@ -1,4 +1,4 @@ -# QChart +# QtChart - 目录 - [折线图](#1折线图) diff --git a/QtDataVisualization/BarsVisualization.py b/QtDataVisualization/BarsVisualization.py new file mode 100644 index 0000000..6808b09 --- /dev/null +++ b/QtDataVisualization/BarsVisualization.py @@ -0,0 +1,468 @@ +#!/usr/bin/env python +# -*- coding: utf-8 -*- + +""" +Created on 2019/10/4 +@author: Irony +@site: https://pyqt5.com , https://github.com/892768447 +@email: 892768447@qq.com +@file: BarsVisualization +@description: 柱状图 +""" + +############################################################################# +## +## Copyright (C) 2014 Riverbank Computing Limited. +## Copyright (C) 2014 Digia Plc +## All rights reserved. +## For any questions to Digia, please use contact form at http://qt.digia.com +## +## This file is part of the QtDataVisualization module. +## +## Licensees holding valid Qt Enterprise licenses may use this file in +## accordance with the Qt Enterprise License Agreement provided with the +## Software or, alternatively, in accordance with the terms contained in +## a written agreement between you and Digia. +## +## If you have questions regarding the use of this file, please use +## contact form at http://qt.digia.com +## +############################################################################# + + +from PyQt5.QtCore import pyqtSignal, QObject, QSize, Qt, QLocale +from PyQt5.QtDataVisualization import (Q3DBars, Q3DCamera, Q3DTheme, + QAbstract3DGraph, QAbstract3DSeries, QBar3DSeries, QBarDataItem, + QCategory3DAxis, QValue3DAxis) +from PyQt5.QtGui import QFont +from PyQt5.QtWidgets import (QApplication, QCheckBox, QComboBox, QFontComboBox, + QHBoxLayout, QLabel, QPushButton, QSizePolicy, QSlider, QVBoxLayout, + QWidget) + +country = QLocale.system().country() +if country in (QLocale.China, QLocale.HongKong, QLocale.Taiwan): + Tr = { + 'Average temperature': '平均温度', + 'Average temperatures in Oulu and Helsinki, Finland (2006-2013)': '芬兰奥卢和赫尔辛基的平均气温（2006-2013）', + 'Change label style': '更改label样式', + 'Smooth bars': '平滑bars', + 'Change camera preset': '更改相机预设', + 'Show background': '显示背景', + 'Show grid': '显示网格', + 'Show second series': '显示第二个数据列', + 'Low': '低质量', + 'Medium': '中等质量', + 'High': '高质量', + 'Low Soft': '柔化低质量', + 'Medium Soft': '柔化中等质量', + 'High Soft': '柔化高质量', + 'Rotate horizontally': '水平旋转', + 'Rotate vertically': '垂直旋转', + 'Show year': '显示年份', + 'Change bar style': '更改条形图样式', + 'Change selection mode': '更改选择模式', + 'Change theme': '更改主题', + 'Adjust shadow quality': '调整阴影质量', + 'Change font': '更改字体', + 'Adjust font size': '调整字体大小' + } +else: + Tr = {} + + +class GraphModifier(QObject): + # 奥卢 温度 + tempOulu = ( + (-6.7, -11.7, -9.7, 3.3, 9.2, 14.0, 16.3, 17.8, 10.2, 2.1, -2.6, -0.3), + (-6.8, -13.3, 0.2, 1.5, 7.9, 13.4, 16.1, 15.5, 8.2, 5.4, -2.6, -0.8), + (-4.2, -4.0, -4.6, 1.9, 7.3, 12.5, 15.0, 12.8, 7.6, 5.1, -0.9, -1.3), + (-7.8, -8.8, -4.2, 0.7, 9.3, 13.2, 15.8, 15.5, 11.2, 0.6, 0.7, -8.4), + (-14.4, -12.1, -7.0, 2.3, 11.0, 12.6, 18.8, 13.8, 9.4, 3.9, -5.6, -13.0), + (-9.0, -15.2, -3.8, 2.6, 8.3, 15.9, 18.6, 14.9, 11.1, 5.3, 1.8, -0.2), + (-8.7, -11.3, -2.3, 0.4, 7.5, 12.2, 16.4, 14.1, 9.2, 3.1, 0.3, -12.1), + (-7.9, -5.3, -9.1, 0.8, 11.6, 16.6, 15.9, 15.5, 11.2, 4.0, 0.1, -1.9) + ) + + # 赫尔辛基 温度 + tempHelsinki = ( + (-3.7, -7.8, -5.4, 3.4, 10.7, 15.4, 18.6, 18.7, 14.3, 8.5, 2.9, 4.1), + (-1.2, -7.5, 3.1, 5.5, 10.3, 15.9, 17.4, 17.9, 11.2, 7.3, 1.1, 0.5), + (-0.6, 1.2, 0.2, 6.3, 10.2, 13.8, 18.1, 15.1, 10.1, 9.4, 2.5, 0.4), + (-2.9, -3.5, -0.9, 4.7, 10.9, 14.0, 17.4, 16.8, 13.2, 4.1, 2.6, -2.3), + (-10.2, -8.0, -1.9, 6.6, 11.3, 14.5, 21.0, 18.8, 12.6, 6.1, -0.5, -7.3), + (-4.4, -9.1, -2.0, 5.5, 9.9, 15.6, 20.8, 17.8, 13.4, 8.9, 3.6, 1.5), + (-3.5, -3.2, -0.7, 4.0, 11.1, 13.4, 17.3, 15.8, 13.1, 6.4, 4.1, -5.1), + (-4.8, -1.8, -5.0, 2.9, 12.8, 17.2, 18.0, 17.1, 12.5, 7.5, 4.5, 2.3) + ) + + months = ( + "January", "February", "March", "April", "May", "June", + "July", "August", "September", "October", "November", "December" + ) + + years = ("2006", "2007", "2008", "2009", "2010", "2011", "2012", "2013") + + shadowQualityChanged = pyqtSignal(int) # 阴影质量改变信号 + backgroundEnabledChanged = pyqtSignal(bool) # 背景开启信号 + gridEnabledChanged = pyqtSignal(bool) # 网格开启信号 + fontChanged = pyqtSignal(QFont) # 字体改变信号 + fontSizeChanged = pyqtSignal(int) # 字体大小改变信号 + + def __init__(self, bargraph): + super(GraphModifier, self).__init__() + + self.m_graph = bargraph # Q3DBars 实例 + + self.m_xRotation = 0.0 # 水平旋转角度 + self.m_yRotation = 0.0 # 垂直旋转角度 + self.m_fontSize = 30 + self.m_segments = 4 + self.m_subSegments = 3 + self.m_minval = -20.0 + self.m_maxval = 20.0 + self.m_temperatureAxis = QValue3DAxis() # 温度轴 + self.m_yearAxis = QCategory3DAxis() # 年份轴 + self.m_monthAxis = QCategory3DAxis() # 月份轴 + self.m_primarySeries = QBar3DSeries() # 主序列 + self.m_secondarySeries = QBar3DSeries() # 次序列 + self.m_barMesh = QAbstract3DSeries.MeshBevelBar # 预定义的网格类型 + self.m_smooth = False # 是否平滑 + + # 阴影以柔化的边缘高质量渲染 + self.m_graph.setShadowQuality(QAbstract3DGraph.ShadowQualitySoftMedium) + # 当前主题Q3DTheme设置背景是否可见 + self.m_graph.activeTheme().setBackgroundEnabled(False) + # 当前主题Q3DTheme设置字体 + self.m_graph.activeTheme().setFont( + QFont('Times New Roman', self.m_fontSize)) + # 当前主题Q3DTheme设置标签是使用彩色背景还是使用完全透明的背景绘制 + self.m_graph.activeTheme().setLabelBackgroundEnabled(True) + # 是否按比例将比例尺设置为单个系列比例尺来缩放比例 + self.m_graph.setMultiSeriesUniform(True) + + self.m_temperatureAxis.setTitle(Tr.get("Average temperature", "Average temperature")) + # 轴上的段数。这表明绘制了多少标签。要绘制的网格线的数量使用公式计算：segments * subsegments + 1。预设默认值为5。该值不能低于1 + self.m_temperatureAxis.setSegmentCount(self.m_segments) + # 轴上每个段内的子段数。 + # 除每个线段外，还在每个子线段之间绘制网格线。预设默认值为1。该值不能低于1。 + self.m_temperatureAxis.setSubSegmentCount(self.m_subSegments) + self.m_temperatureAxis.setRange(self.m_minval, self.m_maxval) + self.m_temperatureAxis.setLabelFormat(u"%.1f \N{degree sign}C") + + self.m_yearAxis.setTitle("Year") + self.m_monthAxis.setTitle("Month") + + self.m_graph.setValueAxis(self.m_temperatureAxis) + # 设置活动行的轴为年份 + self.m_graph.setRowAxis(self.m_yearAxis) + # 设置活动列的轴为月份 + self.m_graph.setColumnAxis(self.m_monthAxis) + + self.m_primarySeries.setItemLabelFormat( + "Oulu - @colLabel @rowLabel: @valueLabel") + # 设置网格类型 + self.m_primarySeries.setMesh(QAbstract3DSeries.MeshBevelBar) + self.m_primarySeries.setMeshSmooth(False) + + self.m_secondarySeries.setItemLabelFormat( + "Helsinki - @colLabel @rowLabel: @valueLabel") + self.m_secondarySeries.setMesh(QAbstract3DSeries.MeshBevelBar) + self.m_secondarySeries.setMeshSmooth(False) + self.m_secondarySeries.setVisible(False) + + self.m_graph.addSeries(self.m_primarySeries) + self.m_graph.addSeries(self.m_secondarySeries) + + self.m_preset = Q3DCamera.CameraPresetFront + self.changePresetCamera() + + self.resetTemperatureData() + + def resetTemperatureData(self): + # 重置温度数据 + dataSet = [] + for row in self.tempOulu: + dataSet.append([QBarDataItem(v) for v in row]) + + self.m_primarySeries.dataProxy().resetArray(dataSet, self.years, + self.months) + + dataSet = [] + for row in self.tempHelsinki: + dataSet.append([QBarDataItem(v) for v in row]) + + self.m_secondarySeries.dataProxy().resetArray(dataSet, self.years, + self.months) + + def changeRange(self, range): + if range >= len(self.years): + self.m_yearAxis.setRange(0, len(self.years) - 1) + else: + self.m_yearAxis.setRange(range, range) + + def changeStyle(self, style): + comboBox = self.sender() + if isinstance(comboBox, QComboBox): + self.m_barMesh = QAbstract3DSeries.Mesh(comboBox.itemData(style)) + self.m_primarySeries.setMesh(self.m_barMesh) + self.m_secondarySeries.setMesh(self.m_barMesh) + + def changePresetCamera(self): + # 修改摄像机的预定义位置 + self.m_graph.scene().activeCamera().setCameraPreset(self.m_preset) + + preset = int(self.m_preset) + 1 + if preset > Q3DCamera.CameraPresetDirectlyBelow: + self.m_preset = Q3DCamera.CameraPresetFrontLow + else: + self.m_preset = Q3DCamera.CameraPreset(preset) + + def changeTheme(self, theme): + # 切换主题 + currentTheme = self.m_graph.activeTheme() + currentTheme.setType(Q3DTheme.Theme(theme)) + self.backgroundEnabledChanged.emit(currentTheme.isBackgroundEnabled()) + self.gridEnabledChanged.emit(currentTheme.isGridEnabled()) + self.fontChanged.emit(currentTheme.font()) + self.fontSizeChanged.emit(currentTheme.font().pointSize()) + + def changeLabelBackground(self): + self.m_graph.activeTheme().setLabelBackgroundEnabled( + not self.m_graph.activeTheme().isLabelBackgroundEnabled()) + + def changeSelectionMode(self, selectionMode): + comboBox = self.sender() + if isinstance(comboBox, QComboBox): + flags = comboBox.itemData(selectionMode) + self.m_graph.setSelectionMode( + QAbstract3DGraph.SelectionFlags(flags)) + + def changeFont(self, font): + self.m_graph.activeTheme().setFont(font) + + def changeFontSize(self, fontsize): + self.m_fontSize = fontsize + font = self.m_graph.activeTheme().font() + font.setPointSize(self.m_fontSize) + self.m_graph.activeTheme().setFont(font) + + def shadowQualityUpdatedByVisual(self, sq): + self.shadowQualityChanged.emit(int(sq)) + + def changeShadowQuality(self, quality): + sq = QAbstract3DGraph.ShadowQuality(quality) + self.m_graph.setShadowQuality(sq) + self.shadowQualityChanged.emit(quality) + + def rotateX(self, rotation): + self.m_xRotation = rotation + self.m_graph.scene().activeCamera().setCameraPosition( + self.m_xRotation, self.m_yRotation) + + def rotateY(self, rotation): + self.m_yRotation = rotation + self.m_graph.scene().activeCamera().setCameraPosition( + self.m_xRotation, self.m_yRotation) + + def setBackgroundEnabled(self, enabled): + self.m_graph.activeTheme().setBackgroundEnabled(enabled) + + def setGridEnabled(self, enabled): + self.m_graph.activeTheme().setGridEnabled(enabled) + + def setSmoothBars(self, smooth): + self.m_smooth = bool(smooth) + self.m_primarySeries.setMeshSmooth(self.m_smooth) + self.m_secondarySeries.setMeshSmooth(self.m_smooth) + + def setSeriesVisibility(self, enabled): + self.m_secondarySeries.setVisible(enabled) + + +if __name__ == '__main__': + import sys + + app = QApplication(sys.argv) + widgetgraph = Q3DBars() + container = QWidget.createWindowContainer(widgetgraph) + + screenSize = widgetgraph.screen().size() + container.setMinimumSize( + QSize(screenSize.width() / 2, screenSize.height() / 1.5)) + container.setMaximumSize(screenSize) + container.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Expanding) + container.setFocusPolicy(Qt.StrongFocus) + + widget = QWidget() + hLayout = QHBoxLayout(widget) + vLayout = QVBoxLayout() + hLayout.addWidget(container, 1) + hLayout.addLayout(vLayout) + + widget.setWindowTitle(Tr.get( + "Average temperatures in Oulu and Helsinki, Finland (2006-2013)", + "Average temperatures in Oulu and Helsinki, Finland (2006-2013)")) + + themeList = QComboBox() + themeList.addItem("Qt") + themeList.addItem("Primary Colors") + themeList.addItem("Digia") + themeList.addItem("Stone Moss") + themeList.addItem("Army Blue") + themeList.addItem("Retro") + themeList.addItem("Ebony") + themeList.addItem("Isabelle") + themeList.setCurrentIndex(0) + + labelButton = QPushButton(Tr.get("Change label style", "Change label style")) + + smoothCheckBox = QCheckBox(Tr.get("Smooth bars", "Smooth bars")) + + barStyleList = QComboBox() + barStyleList.addItem("Bar", QAbstract3DSeries.MeshBar) + barStyleList.addItem("Pyramid", QAbstract3DSeries.MeshPyramid) + barStyleList.addItem("Cone", QAbstract3DSeries.MeshCone) + barStyleList.addItem("Cylinder", QAbstract3DSeries.MeshCylinder) + barStyleList.addItem("Bevel bar", QAbstract3DSeries.MeshBevelBar) + barStyleList.addItem("Sphere", QAbstract3DSeries.MeshSphere) + barStyleList.setCurrentIndex(4) + + cameraButton = QPushButton(Tr.get("Change camera preset", "Change camera preset")) + + selectionModeList = QComboBox() + selectionModeList.addItem("None", QAbstract3DGraph.SelectionNone) + selectionModeList.addItem("Bar", QAbstract3DGraph.SelectionItem) + selectionModeList.addItem("Row", QAbstract3DGraph.SelectionRow) + selectionModeList.addItem("Bar and Row", + QAbstract3DGraph.SelectionItemAndRow) + selectionModeList.addItem("Column", QAbstract3DGraph.SelectionColumn) + selectionModeList.addItem("Bar and Column", + QAbstract3DGraph.SelectionItemAndColumn) + selectionModeList.addItem("Row and Column", + QAbstract3DGraph.SelectionRowAndColumn) + selectionModeList.addItem("Bar, Row and Column", + QAbstract3DGraph.SelectionItemRowAndColumn) + selectionModeList.addItem("Slice into Row", + QAbstract3DGraph.SelectionSlice | QAbstract3DGraph.SelectionRow) + selectionModeList.addItem("Slice into Row and Item", + QAbstract3DGraph.SelectionSlice | QAbstract3DGraph.SelectionItemAndRow) + selectionModeList.addItem("Slice into Column", + QAbstract3DGraph.SelectionSlice | QAbstract3DGraph.SelectionColumn) + selectionModeList.addItem("Slice into Column and Item", + QAbstract3DGraph.SelectionSlice | QAbstract3DGraph.SelectionItemAndColumn) + selectionModeList.addItem("Multi: Bar, Row, Col", + QAbstract3DGraph.SelectionItemRowAndColumn | QAbstract3DGraph.SelectionMultiSeries) + selectionModeList.addItem("Multi, Slice: Row, Item", + QAbstract3DGraph.SelectionSlice | QAbstract3DGraph.SelectionItemAndRow | QAbstract3DGraph.SelectionMultiSeries) + selectionModeList.addItem("Multi, Slice: Col, Item", + QAbstract3DGraph.SelectionSlice | QAbstract3DGraph.SelectionItemAndColumn | QAbstract3DGraph.SelectionMultiSeries) + selectionModeList.setCurrentIndex(1) + + backgroundCheckBox = QCheckBox(Tr.get("Show background", "Show background")) + + gridCheckBox = QCheckBox(Tr.get("Show grid", "Show grid")) + gridCheckBox.setChecked(True) + + seriesCheckBox = QCheckBox(Tr.get("Show second series", "Show second series")) + + rotationSliderX = QSlider(Qt.Horizontal) + rotationSliderX.setTickInterval(30) + rotationSliderX.setTickPosition(QSlider.TicksBelow) + rotationSliderX.setMinimum(-180) + rotationSliderX.setValue(0) + rotationSliderX.setMaximum(180) + rotationSliderY = QSlider(Qt.Horizontal) + rotationSliderY.setTickInterval(15) + rotationSliderY.setTickPosition(QSlider.TicksAbove) + rotationSliderY.setMinimum(-90) + rotationSliderY.setValue(0) + rotationSliderY.setMaximum(90) + + fontSizeSlider = QSlider(Qt.Horizontal) + fontSizeSlider.setTickInterval(10) + fontSizeSlider.setTickPosition(QSlider.TicksBelow) + fontSizeSlider.setMinimum(1) + fontSizeSlider.setValue(30) + fontSizeSlider.setMaximum(100) + + fontList = QFontComboBox() + fontList.setCurrentFont(QFont('Times New Roman')) + + shadowQuality = QComboBox() + shadowQuality.addItem("None") + shadowQuality.addItem(Tr.get("Low", "Low")) + shadowQuality.addItem(Tr.get("Medium", "Medium")) + shadowQuality.addItem(Tr.get("High", "High")) + shadowQuality.addItem(Tr.get("Low Soft", "Low Soft")) + shadowQuality.addItem(Tr.get("Medium Soft", "Medium Soft")) + shadowQuality.addItem(Tr.get("High Soft", "High Soft")) + shadowQuality.setCurrentIndex(5) + + rangeList = QComboBox() + rangeList.addItems(GraphModifier.years) + rangeList.addItem("All") + rangeList.setCurrentIndex(len(GraphModifier.years)) + + vLayout.addWidget(QLabel(Tr.get("Rotate horizontally", "Rotate horizontally"))) + vLayout.addWidget(rotationSliderX, 0, Qt.AlignTop) + vLayout.addWidget(QLabel(Tr.get("Rotate vertically", "Rotate vertically"))) + vLayout.addWidget(rotationSliderY, 0, Qt.AlignTop) + vLayout.addWidget(labelButton, 0, Qt.AlignTop) + vLayout.addWidget(cameraButton, 0, Qt.AlignTop) + vLayout.addWidget(backgroundCheckBox) + vLayout.addWidget(gridCheckBox) + vLayout.addWidget(smoothCheckBox) + vLayout.addWidget(seriesCheckBox) + vLayout.addWidget(QLabel(Tr.get("Show year", "Show year"))) + vLayout.addWidget(rangeList) + vLayout.addWidget(QLabel(Tr.get("Change bar style", "Change bar style"))) + vLayout.addWidget(barStyleList) + vLayout.addWidget(QLabel(Tr.get("Change selection mode", "Change selection mode"))) + vLayout.addWidget(selectionModeList) + vLayout.addWidget(QLabel(Tr.get("Change theme", "Change theme"))) + vLayout.addWidget(themeList) + vLayout.addWidget(QLabel(Tr.get("Adjust shadow quality", "Adjust shadow quality"))) + vLayout.addWidget(shadowQuality) + vLayout.addWidget(QLabel(Tr.get("Change font", "Change font"))) + vLayout.addWidget(fontList) + vLayout.addWidget(QLabel(Tr.get("Adjust font size", "Adjust font size"))) + vLayout.addWidget(fontSizeSlider, 1, Qt.AlignTop) + + modifier = GraphModifier(widgetgraph) + + rotationSliderX.valueChanged.connect(modifier.rotateX) + rotationSliderY.valueChanged.connect(modifier.rotateY) + + labelButton.clicked.connect(modifier.changeLabelBackground) + cameraButton.clicked.connect(modifier.changePresetCamera) + + backgroundCheckBox.stateChanged.connect(modifier.setBackgroundEnabled) + gridCheckBox.stateChanged.connect(modifier.setGridEnabled) + smoothCheckBox.stateChanged.connect(modifier.setSmoothBars) + seriesCheckBox.stateChanged.connect(modifier.setSeriesVisibility) + + modifier.backgroundEnabledChanged.connect(backgroundCheckBox.setChecked) + modifier.gridEnabledChanged.connect(gridCheckBox.setChecked) + + rangeList.currentIndexChanged.connect(modifier.changeRange) + + barStyleList.currentIndexChanged.connect(modifier.changeStyle) + + selectionModeList.currentIndexChanged.connect(modifier.changeSelectionMode) + + themeList.currentIndexChanged.connect(modifier.changeTheme) + + shadowQuality.currentIndexChanged.connect(modifier.changeShadowQuality) + + modifier.shadowQualityChanged.connect(shadowQuality.setCurrentIndex) + widgetgraph.shadowQualityChanged.connect( + modifier.shadowQualityUpdatedByVisual) + + fontSizeSlider.valueChanged.connect(modifier.changeFontSize) + fontList.currentFontChanged.connect(modifier.changeFont) + + modifier.fontSizeChanged.connect(fontSizeSlider.setValue) + modifier.fontChanged.connect(fontList.setCurrentFont) + + widget.show() + sys.exit(app.exec_()) diff --git a/QtDataVisualization/README.en.md b/QtDataVisualization/README.en.md new file mode 100644 index 0000000..e69de29 diff --git a/QtDataVisualization/README.md b/QtDataVisualization/README.md new file mode 100644 index 0000000..68bf2ba --- /dev/null +++ b/QtDataVisualization/README.md @@ -0,0 +1,9 @@ +# QtDataVisualization + +- 目录 + - [柱状图3D](#1柱状图3D) + +## 1、柱状图3D +[运行 BarsVisualization.py](BarsVisualization.py) + +![BarsVisualization](ScreenShot/BarsVisualization.gif) \ No newline at end of file diff --git a/QtDataVisualization/ScreenShot/BarsVisualization.gif b/QtDataVisualization/ScreenShot/BarsVisualization.gif new file mode 100644 index 0000000..4df9d08 Binary files /dev/null and b/QtDataVisualization/ScreenShot/BarsVisualization.gif differ diff --git a/QtDataVisualization/requirements.txt b/QtDataVisualization/requirements.txt new file mode 100644 index 0000000..a7972d6 --- /dev/null +++ b/QtDataVisualization/requirements.txt @@ -0,0 +1 @@ +PyQtDataVisualization diff --git a/README.md b/README.md index 3e1bfa4..87b7db8 100644 --- a/README.md +++ b/README.md @@ -167,7 +167,10 @@ https://pyqt5.com 社区是专门针对PyQt5学习和提升开设的博客网站 - [横向百分比柱状图表](QtChart/HorizontalPercentBarChart.py) - [散点图表](QtChart/ScatterChart.py) - [图表主题动画](QtChart/ChartThemes.py) - + +- [QtDataVisualization](QtDataVisualization) + - [柱状图3D](QtDataVisualization/BarsVisualization.py) + - [PyQtGraph](PyQtGraph) - [鼠标获取X轴坐标](PyQtGraph/mouseFlow.py) - [禁止右键点击功能、鼠标滚轮，添加滚动条等功能](PyQtGraph/graph1.py)