章节 5 - 添加图表视图
A table is nice to present data, but a chart is even better. For this, you need the QtCharts module that provides many types of plots and options to graphically represent data.
The placeholder for a plot is a QChartView, and inside that Widget you can place a QChart. As a first step, try including only this without any data to plot.
Make the following highlighted changes to
main_widget.py
from the previous chapter to add a QChartView:
from PySide2.QtCore import QDateTime, Qt
from PySide2.QtGui import QPainter
from PySide2.QtWidgets import (QWidget, QHeaderView, QHBoxLayout, QTableView,
QSizePolicy)
from PySide2.QtCharts import QtCharts
from table_model import CustomTableModel
class Widget(QWidget):
def __init__(self, data):
QWidget.__init__(self)
# Getting the Model
self.model = CustomTableModel(data)
# Creating a QTableView
self.table_view = QTableView()
self.table_view.setModel(self.model)
# QTableView Headers
self.horizontal_header = self.table_view.horizontalHeader()
self.vertical_header = self.table_view.verticalHeader()
self.horizontal_header.setSectionResizeMode(QHeaderView.ResizeToContents)
self.vertical_header.setSectionResizeMode(QHeaderView.ResizeToContents)
self.horizontal_header.setStretchLastSection(True)
# Creating QChart
self.chart = QtCharts.QChart()
self.chart.setAnimationOptions(QtCharts.QChart.AllAnimations)
# Creating QChartView
self.chart_view = QtCharts.QChartView(self.chart)
self.chart_view.setRenderHint(QPainter.Antialiasing)
# QWidget Layout
self.main_layout = QHBoxLayout()
size = QSizePolicy(QSizePolicy.Preferred, QSizePolicy.Preferred)
## Left layout
size.setHorizontalStretch(1)
self.table_view.setSizePolicy(size)
self.main_layout.addWidget(self.table_view)
## Right Layout
size.setHorizontalStretch(4)
self.chart_view.setSizePolicy(size)
self.main_layout.addWidget(self.chart_view)
# Set the layout to the QWidget
self.setLayout(self.main_layout)
