Question

我想使用QSplitter在两侧分割MainWindow。在左边我想要一个包含文件夹视图的布局，在右边另一个布局我将绘制一些东西。但我只能在QSplitter上添加Widgets，而Layouts不是Widgets。我发现的唯一类似问题是：

http://www.qtcentre.org/threads/16856-QSplitter-multiple-layouts-how https://forum.qt.io/topic/8197/solved-qsplitter-and-qvboxlayout-problem

所以，根据上面的链接，我的计划是创建两个布局，然后将它们添加到两个QWidgets（使用setLayout），然后将这些QWidgets添加到QSplitter（使用addWidget）。我尝试将其应用于我的代码，但不幸的是，当我向窗口小部件添加布局时，没有任何显示！

还有另一种方法可以达到我的目的吗？我误解了答案吗？

这是代码。我只向您发送文件夹视图布局，以便使代码更简单。另外，我对pyqt和面向对象编程完全陌生，所以欢迎任何关于如何改进它的赞誉！

提前致谢！

import sys
from PyQt5.QtWidgets import *
from PyQt5.QtGui import *
from PyQt5.QtCore import *

class Window(QMainWindow):

    def __init__(self, parent=None):

        super(Window, self).__init__(parent)
        self.UI()

    def UI(self):

        self.central_widget = QStackedWidget()
        self.setCentralWidget(self.central_widget)

        self.statusBar().showMessage("Ready")

        page1 = FirstWidget(self)
        page1.visualize_btn.clicked.connect(self.P_2)
        self.central_widget.addWidget(page1)        

        self.setGeometry(10, 10, 800, 500)    #All three methods have been inherited from the QWidget class.
        self.showMaximized()
        self.setWindowTitle('PTV')
        self.setWindowIcon(QIcon('tuc_logo.png'))

    def P_2(self):

        page2 = VisualizeWidget(self)
        self.central_widget.addWidget(page2)
        self.central_widget.setCurrentWidget(page2)


class FirstWidget(QWidget):

    def __init__(self, parent=None):
        super(FirstWidget, self).__init__(parent)
        self.buttons()

    def buttons(self):

        self.btn2 = QPushButton("Visualize")
        self.buttonsLayout = QVBoxLayout() 
        self.buttonsLayout.addWidget(self.btn2)
        self.visualize_btn = self.btn2        
        self.setLayout(self.buttonsLayout)


class VisualizeWidget(QWidget):

    def __init__(self, parent=None):
        super(VisualizeWidget, self).__init__(parent)


        self.dirmodel = QFileSystemModel()        
        self.dirmodel.setFilter(QDir.NoDotAndDotDot | QDir.AllDirs)    # Don't show files, just folders

        self.folder_view = QTreeView(parent=self);
        self.folder_view.setModel(self.dirmodel)
        self.folder_view.clicked[QModelIndex].connect(self.clicked)

        self.now_layout = QVBoxLayout()
        self.now_layout.addWidget(self.folder_view)

        #self.setLayout(self.now_layout)

        #HERE is where I'm trying to add the layout to the widget. 
        self.left_widget = QWidget()
        self.left_widget.setLayout(self.now_layout)            


    def set_path(self):
        self.dirmodel.setRootPath("")

    def clicked(self, index):
        index = self.selectionModel.currentIndex()
        dir_path = self.dirmodel.filePath(index)

        self.filemodel.setRootPath(dir_path)
        self.file_view.setRootIndex(self.filemodel.index(dir_path))          

def main():
    app = QApplication(sys.argv)
    win = Window()
    win.show()
    app.exec_()

if __name__ == '__main__':
    sys.exit(main())

Answer 1

我实际上还没有理解我做错了什么，但我发布了一个有效的代码，以防将来帮助其他人。

现在使用QSplitter分割两个布局。

import sys
from PyQt5.QtWidgets import *
from PyQt5.QtGui import *
from PyQt5.QtCore import *

class Window(QMainWindow):

    def __init__(self, parent=None):

        super(Window, self).__init__(parent)
        self.UI()

    def UI(self):

        self.central_widget = QStackedWidget()
        self.setCentralWidget(self.central_widget)

        self.statusBar().showMessage("Ready")

        page1 = FirstWidget(self)
        page1.visualize_btn.clicked.connect(self.P_2)
        self.central_widget.addWidget(page1)        

        self.setGeometry(10, 10, 800, 500)    #All three methods have been inherited from the QWidget class.
        self.showMaximized()
        self.setWindowTitle('PTV')
        self.setWindowIcon(QIcon('tuc_logo.png'))

    def P_2(self):

        page2 = VisualizeWidget(self)
        self.central_widget.addWidget(page2)
        self.central_widget.setCurrentWidget(page2)


class FirstWidget(QWidget):

    def __init__(self, parent=None):
        super(FirstWidget, self).__init__(parent)
        self.buttons()

    def buttons(self):

        self.btn2 = QPushButton("Visualize")
        self.buttonsLayout = QVBoxLayout() 
        self.buttonsLayout.addWidget(self.btn2)
        self.visualize_btn = self.btn2        
        self.setLayout(self.buttonsLayout)


class VisualizeWidget(QWidget):

    def __init__(self, parent=None):
        super(VisualizeWidget, self).__init__(parent)


        #Creation of the left layout
        self.dirmodel = QFileSystemModel()        
        self.dirmodel.setFilter(QDir.NoDotAndDotDot | QDir.AllDirs)    # Don't show files, just folders

        self.folder_view = QTreeView(parent=self);
        self.folder_view.setModel(self.dirmodel)
        self.folder_view.clicked[QModelIndex].connect(self.clicked)

        self.selectionModel = self.folder_view.selectionModel()

        self.now_layout = QVBoxLayout()
        self.now_layout.addWidget(self.folder_view)


        self.left_widget = QWidget()
        self.left_widget.setLayout(self.now_layout)


        #Creation of the right layout
        #self.right_widget = QTextEdit();

        self.btn1 = QPushButton('btn1')

        self.right_layout = QVBoxLayout()
        self.right_layout.addWidget(self.btn1)

        self.right_widget = QWidget()
        self.right_widget.setLayout(self.right_layout)




        splitter_filebrowser = QSplitter(Qt.Horizontal)
        splitter_filebrowser.addWidget(self.left_widget)
        splitter_filebrowser.addWidget(self.right_widget)
        splitter_filebrowser.setStretchFactor(1, 1)

        hbox = QHBoxLayout(self)
        hbox.addWidget(splitter_filebrowser)

        self.setLayout(hbox)



    def set_path(self):
        self.dirmodel.setRootPath("")

    def clicked(self, index):
        index = self.selectionModel.currentIndex()
        dir_path = self.dirmodel.filePath(index)

        self.filemodel.setRootPath(dir_path)
        self.file_view.setRootIndex(self.filemodel.index(dir_path))          

def main():
    app = QApplication(sys.argv)
    win = Window()
    win.show()
    app.exec_()

if __name__ == '__main__':
    sys.exit(main())

Answer 2

我自由地清理@ A.Dew对其最小通用形式的回答。

left.merge(right2, left_on='idxkey', right_on='colkey')

    value_x colkey   value_y
0 -0.402655      B  0.543843
1 -0.524349      D  0.013135

PyQt - 为QSplitter添加布局

2 个答案: