我正在创建一个界面，我想通过单击按钮在另一个选项卡中绘制图形。我希望图形在滚动区域中并排绘制。问题是，当我绘制图形时......
我正在创建一个界面，我想通过单击按钮在另一个选项卡中绘制图形。我希望图形在滚动区域中并排绘制。问题是，当我绘制图形时，滚动条不会在可视化上工作，而是图形实际上会缩小以适合小部件
这是一个最小的可重复示例
import sys
from PyQt5.QtWidgets import (QApplication, QMainWindow, QWidget, QPushButton,
QLabel, QVBoxLayout, QHBoxLayout, QMessageBox,
QLineEdit,QComboBox, QAction, QTabWidget, QScrollArea)
from matplotlib.backends.backend_qt5agg import FigureCanvasQTAgg as FigureCanvas
from matplotlib.backends.backend_qt5agg import NavigationToolbar2QT as NavigationToolbar
from matplotlib.figure import Figure
import matplotlib.pyplot as plt
from PyQt5.QtCore import Qt
from PyQt5 import QtGui
class MainWindow(QMainWindow):
#view (GUI)
def __init__(self, parent = None):
#initalizer
super(MainWindow, self).__init__(parent)
#Window
self.setWindowTitle("DataVisualizationPrototype")
self.setGeometry(400, 200, 900, 800)
self.activateWindow()
self.raise_()
self.tab_widget = TabWidget(self)
self.setCentralWidget(self.tab_widget)
class TabWidget(QWidget):
def __init__(self, parent):
super(QWidget, self).__init__(parent)
self.layout =QVBoxLayout(self)
self.tabs = QTabWidget()
self.tab1 = QWidget()
self.tab2 = QWidget()
self.tabs.addTab(self.tab1, "Home")
self.tabs.addTab(self.tab2, "Comparison")
self.layout.addWidget(self.tabs)
self.setLayout(self.layout)
#HOME PAGE
#==========================================
#GeneralLayout
self.tab1layout = QVBoxLayout()
self.tab1.setLayout(self.tab1layout)
self.tab1layout.sizeHint()
plotButton = QPushButton()
self.tab1layout.addWidget(plotButton)
plotbutton.clicked.connect(onclick2)
#COMPARISON TAB
#==========================================
#GeneralLayout
self.tab2layout = QVBoxLayout()
self.tab2.setLayout(self.tab2layout)
self.tab2layout.sizeHint()
self.compGraphLayout = QHBoxLayout()
self.compGraphLayout.addStretch()
self.compScroll = QScrollArea()
self.compScroll.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOn)
self.compScroll.setVerticalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
self.scrollWidget = QWidget()
self.compScroll.setWidget(self.scrollWidget)
self.compScroll.setWidgetResizable(True)
self.tab2layout.addWidget(self.compScroll)
self.scrollWidget.setLayout(self.compGraphLayout)
def onclick2(self, event):
self.plotLayout = QVBoxLayout()
self.fig = plt.figure()
self.plotLayout.addWidget(FigureCanvas(self.fig))
self.plotLayout.addWidget(NavigationToolbar
(FigureCanvas(self.fig),
self.scrollWidget))
self.compGraphLayout.addLayout(self.plotLayout)
#Plot MRE
self.fig.plt.plot([1, 2, 3, 4])
self.fig.plt.ylabel('some numbers')
FigureCanvas(self.fig).adjustSize()
def main():
pt1 = QApplication(sys.argv)
view = MainWindow()
view.show()
sys.exit(pt1.exec())
if __name__ == '__main__':
main()
OP 提供的代码很混乱、冗余，并且有一些拼写错误，所以我将避免指出错误的原因。
我的解决方案提出了一种简单明了的方法来实现水平显示图表的目标。另一方面，画布没有合适的sizeHint，因此小部件将被压缩，从而使滚动条不可见，因此一个可能的选择是设置最小宽度。
import sys
from PyQt5.QtWidgets import (
QApplication,
QMainWindow,
QWidget,
QPushButton,
QVBoxLayout,
QHBoxLayout,
QTabWidget,
QScrollArea,
)
from matplotlib.backends.backend_qt5agg import FigureCanvasQTAgg as FigureCanvas
from matplotlib.backends.backend_qt5agg import NavigationToolbar2QT as NavigationToolbar
from matplotlib.figure import Figure
class MainWindow(QMainWindow):
def __init__(self, parent=None):
super(MainWindow, self).__init__(parent)
# Window
self.setWindowTitle("DataVisualizationPrototype")
self.setGeometry(400, 200, 900, 800)
self.activateWindow()
self.raise_()
self.tab_widget = TabWidget()
self.setCentralWidget(self.tab_widget)
class TabWidget(QTabWidget):
def __init__(self, parent=None):
super(TabWidget, self).__init__(parent)
self.tab1 = QWidget()
self.plot_button = QPushButton("Add plot")
lay = QVBoxLayout(self.tab1)
lay.addWidget(self.plot_button)
self.tab2 = QWidget()
self.scroll_area = QScrollArea()
self.scroll_container = QWidget()
self.scroll_area.setWidgetResizable(True)
self.scroll_area.setWidget(self.scroll_container)
self.scroll_layout = QHBoxLayout(self.scroll_container)
lay = QVBoxLayout(self.tab2)
lay.addWidget(self.scroll_area)
self.addTab(self.tab1, "Home")
self.addTab(self.tab2, "Comparison")
self.plot_button.clicked.connect(self.plot)
def plot(self):
canvas = FigureCanvas(Figure())
ax = canvas.figure.add_subplot(111)
toolbar = NavigationToolbar(canvas, self)
container = QWidget()
lay = QVBoxLayout(container)
lay.addWidget(canvas)
lay.addWidget(toolbar)
self.scroll_layout.addWidget(container)
container.setMinimumWidth(400)
ax.plot([1, 2, 3, 4])
ax.set_ylabel("some numbers")
def main():
app = QApplication(sys.argv)
view = MainWindow()
view.show()
sys.exit(app.exec())
if __name__ == "__main__":
main()