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Bug
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Resolution: Out of scope
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Not Evaluated
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None
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6.9, 6.10.0
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None
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python 3.13.2 window10
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Windows
Following is a demo. When run it, it will display the sales bar chart for the period from January to December 2022.
import sys from PySide6.QtWidgets import (QApplication, QMainWindow, QVBoxLayout, QWidget, QComboBox, QLabel, QHBoxLayout, QPushButton) from PySide6.QtCharts import QChart, QChartView, QBarSet, QBarSeries, QValueAxis, QBarCategoryAxis from PySide6.QtCore import Qt from PySide6.QtGui import QPainter, QColor class BarChartExample(QMainWindow): def __init__(self): super().__init__() # Set basic window properties self.setWindowTitle("PySide6 Bar Chart Example") self.setGeometry(100, 100, 800, 600) # Create central widget and layout central_widget = QWidget() self.setCentralWidget(central_widget) main_layout = QVBoxLayout(central_widget) # Add title title_label = QLabel("Monthly Sales Statistics") title_label.setAlignment(Qt.AlignmentFlag.AlignCenter) title_label.setStyleSheet("font-size: 20px; font-weight: bold; margin: 10px;") main_layout.addWidget(title_label) # Create chart and add to layout self.create_chart() main_layout.addWidget(self.chart_view) # Add interactive controls control_layout = QHBoxLayout() main_layout.addLayout(control_layout) # Add year selection combo box control_layout.addWidget(QLabel("Select Year:")) self.year_combobox = QComboBox() self.year_combobox.addItems(["2022", "2023", "2024"]) self.year_combobox.currentTextChanged.connect(self.update_chart_data) control_layout.addWidget(self.year_combobox) btn = QPushButton("<-") btn.clicked.connect(lambda: self.update_axis_x(-1)) control_layout.addWidget(btn) btn = QPushButton("->") btn.clicked.connect(lambda: self.update_axis_x(1)) control_layout.addWidget(btn) # Add a spacer to right-align other controls control_layout.addStretch() def create_chart(self): # Create bar series self.series = QBarSeries() self.series.setLabelsPosition(QBarSeries.LabelsPosition.LabelsOutsideEnd) # Initialize data self.update_chart_data("2022") # Create chart and add series self.chart = QChart() self.chart.addSeries(self.series) self.chart.setTitle("Monthly Sales of Each Product (10,000 yuan)") self.chart.setAnimationOptions(QChart.AnimationOption.SeriesAnimations) # Add animation effect # Category axis (X-axis) categories = ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"] self.axis_x = QBarCategoryAxis() self.axis_x.append(categories) self.chart.addAxis(self.axis_x, Qt.AlignmentFlag.AlignBottom) self.series.attachAxis(self.axis_x) # Value axis (Y-axis) self.axis_y = QValueAxis() self.axis_y.setRange(0, 150) # Set Y-axis range self.axis_y.setTitleText("Sales (10,000 yuan)") self.chart.addAxis(self.axis_y, Qt.AlignmentFlag.AlignLeft) self.series.attachAxis(self.axis_y) # Create chart view self.chart_view = QChartView(self.chart) self.chart_view.setRenderHint(QPainter.RenderHint.Antialiasing) # Antialiasing def update_chart_data(self, year): # Clear existing data self.series.clear() # Set different data based on selected year if year == "2022": product_a = QBarSet("Product A") product_b = QBarSet("Product B") product_c = QBarSet("Product C") product_a.append([50, 60, 70, 65, 75, 80, 85, 90, 95, 100, 110, 120]) product_b.append([30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85]) product_c.append([20, 25, 28, 30, 35, 40, 45, 50, 55, 60, 65, 70]) # Set different colors product_a.setColor(QColor(0, 120, 215)) product_a.setLabelColor(QColor(0, 120, 215)) product_b.setColor(QColor(51, 181, 229)) product_b.setLabelColor(QColor(51, 181, 229)) product_c.setColor(QColor(102, 194, 165)) product_c.setLabelColor(QColor(102, 194, 165)) self.series.append([product_a, product_b, product_c]) elif year == "2023": product_a = QBarSet("Product A") product_b = QBarSet("Product B") product_c = QBarSet("Product C") product_a.append([60, 70, 80, 75, 85, 90, 95, 100, 105, 110, 120, 130]) product_b.append([40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95]) product_c.append([30, 35, 38, 40, 45, 50, 55, 60, 65, 70, 75, 80]) product_a.setColor(QColor(0, 120, 215)) product_a.setLabelColor(QColor(0, 120, 215)) product_b.setColor(QColor(51, 181, 229)) product_b.setLabelColor(QColor(51, 181, 229)) product_c.setColor(QColor(102, 194, 165)) product_c.setLabelColor(QColor(102, 194, 165)) self.series.append([product_a, product_b, product_c]) elif year == "2024": product_a = QBarSet("Product A") product_b = QBarSet("Product B") product_c = QBarSet("Product C") product_d = QBarSet("Product D") # New product in 2024 product_a.append([70, 80, 90, 85, 95, 100, 105, 110, 115, 120, 130, 140]) product_b.append([50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 105]) product_c.append([40, 45, 48, 50, 55, 60, 65, 70, 75, 80, 85, 90]) product_d.append([20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75]) product_a.setColor(QColor(0, 120, 215)) product_a.setLabelColor(QColor(0, 120, 215)) product_b.setColor(QColor(51, 181, 229)) product_b.setLabelColor(QColor(51, 181, 229)) product_c.setColor(QColor(102, 194, 165)) product_c.setLabelColor(QColor(102, 194, 165)) product_d.setColor(QColor(252, 141, 98)) product_d.setLabelColor(QColor(252, 141, 98)) self.series.append([product_a, product_b, product_c, product_d]) self.series.setLabelsVisible(True) self.series.setLabelsAngle(-45) self.series.setLabelsFormat("@value") def update_axis_x(self, d): c = self.axis_x.categories() start = max(min(c.index(self.axis_x.min()) + d, len(c) - 1 - 4), 0) self.axis_x.setRange(c[start], c[start + 4]) if __name__ == "__main__": app = QApplication(sys.argv) window = BarChartExample() window.show() sys.exit(app.exec())
When the <- or -> button is clicked, it will zoom in to five bar charts and can be panned left/right. As written in the code, this translation operation is achieved through the setRange of the abscissa. However, when the translation reaches a certain stage, there will be a situation where the bar chart does not match the data label. This Bug has been bothering me for some time. Is it related to the refresh mechanism of the qt bar chart?
