How to reimplement sizeHint() that when call adjustSize() can get the size after layout?

darrenleeleelee1

First If I just use QtWidgets.QGraphicsView, then call adjustSize() can get the size after layout.

from PyQt5 import QtCore, QtGui, QtWidgets

class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(800, 600)
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.gridLayout = QtWidgets.QGridLayout(self.centralwidget)
        self.gridLayout.setObjectName("gridLayout")
        self.frame = QtWidgets.QFrame(self.centralwidget)
        self.frame.setFrameShape(QtWidgets.QFrame.StyledPanel)
        self.frame.setFrameShadow(QtWidgets.QFrame.Raised)
        self.frame.setObjectName("frame")
        self.gridLayout_2 = QtWidgets.QGridLayout(self.frame)
        self.gridLayout_2.setObjectName("gridLayout_2")
        self.graphicsView_2 = QtWidgets.QGraphicsView(self.frame)
        self.graphicsView_2.setObjectName("graphicsView_2")
        self.gridLayout_2.addWidget(self.graphicsView_2, 0, 1, 1, 1)
        self.graphicsView = QtWidgets.QGraphicsView(self.frame)
        self.graphicsView.setObjectName("graphicsView")
        self.gridLayout_2.addWidget(self.graphicsView, 0, 0, 1, 1)
        self.graphicsView_3 = QtWidgets.QGraphicsView(self.frame)
        self.graphicsView_3.setObjectName("graphicsView_3")
        self.graphicsView_3.adjustSize()
        print(self.graphicsView_3.size())
        self.gridLayout_2.addWidget(self.graphicsView_3, 1, 0, 1, 1)
        self.graphicsView_4 = QtWidgets.QGraphicsView(self.frame)
        self.graphicsView_4.setObjectName("graphicsView_4")
        self.gridLayout_2.addWidget(self.graphicsView_4, 1, 1, 1, 1)
        self.gridLayout.addWidget(self.frame, 0, 0, 1, 1)
        MainWindow.setCentralWidget(self.centralwidget)
        self.menubar = QtWidgets.QMenuBar(MainWindow)
        self.menubar.setGeometry(QtCore.QRect(0, 0, 800, 25))
        self.menubar.setObjectName("menubar")
        MainWindow.setMenuBar(self.menubar)
        self.statusbar = QtWidgets.QStatusBar(MainWindow)
        self.statusbar.setObjectName("statusbar")
        MainWindow.setStatusBar(self.statusbar)

        self.retranslateUi(MainWindow)
        QtCore.QMetaObject.connectSlotsByName(MainWindow)

    def retranslateUi(self, MainWindow):
        _translate = QtCore.QCoreApplication.translate
        MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))


if __name__ == "__main__":
    import sys
    app = QtWidgets.QApplication(sys.argv)
    MainWindow = QtWidgets.QMainWindow()
    ui = Ui_MainWindow()
    ui.setupUi(MainWindow)
    MainWindow.show()
    sys.exit(app.exec_())

I have a self define QGraphicsView is PhotoViewer
but I have not reimplemented sizeHint() or adjustSize() yet, I am wondering how to reimplement that I can achieve when call adjustSize() to get the size after layout?

from PyQt5 import QtCore, QtGui, QtWidgets
from PhotoViewer import PhotoViewer

class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(800, 600)
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.gridLayout = QtWidgets.QGridLayout(self.centralwidget)
        self.gridLayout.setObjectName("gridLayout")
        self.frame = QtWidgets.QFrame(self.centralwidget)
        self.frame.setFrameShape(QtWidgets.QFrame.StyledPanel)
        self.frame.setFrameShadow(QtWidgets.QFrame.Raised)
        self.frame.setObjectName("frame")
        self.gridLayout_2 = QtWidgets.QGridLayout(self.frame)
        self.gridLayout_2.setObjectName("gridLayout_2")
        self.graphicsView_2 = PhotoViewer(self.frame)
        self.graphicsView_2.setObjectName("graphicsView_2")
        self.gridLayout_2.addWidget(self.graphicsView_2, 0, 1, 1, 1)
        self.graphicsView = PhotoViewer(self.frame)
        self.graphicsView.setObjectName("graphicsView")
        self.gridLayout_2.addWidget(self.graphicsView, 0, 0, 1, 1)
        self.graphicsView_3 = PhotoViewer(self.frame)
        self.graphicsView_3.setObjectName("graphicsView_3")
        self.gridLayout_2.addWidget(self.graphicsView_3, 1, 2, 1, 1)
        self.graphicsView_3.adjustSize()
        print(self.graphicsView_3.size())
        self.graphicsView_4 = PhotoViewer(self.frame)
        self.graphicsView_4.setObjectName("graphicsView_4")
        self.gridLayout_2.addWidget(self.graphicsView_4, 1, 1, 1, 1)
        self.gridLayout.addWidget(self.frame, 0, 0, 1, 1)
        MainWindow.setCentralWidget(self.centralwidget)
        self.menubar = QtWidgets.QMenuBar(MainWindow)
        self.menubar.setGeometry(QtCore.QRect(0, 0, 800, 25))
        self.menubar.setObjectName("menubar")
        MainWindow.setMenuBar(self.menubar)
        self.statusbar = QtWidgets.QStatusBar(MainWindow)
        self.statusbar.setObjectName("statusbar")
        MainWindow.setStatusBar(self.statusbar)

        self.retranslateUi(MainWindow)
        QtCore.QMetaObject.connectSlotsByName(MainWindow)

    def retranslateUi(self, MainWindow):
        _translate = QtCore.QCoreApplication.translate
        MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))


if __name__ == "__main__":
    import sys
    app = QtWidgets.QApplication(sys.argv)
    MainWindow = QtWidgets.QMainWindow()
    ui = Ui_MainWindow()
    ui.setupUi(MainWindow)
    MainWindow.show()
    sys.exit(app.exec_())

This code is showing that I got QtCore.Size() when I call adjustSize()

SGaist

Hi,

Until widgets are shown they do not have any "physical" size.

What is your end goal ?

darrenleeleelee1

I want to have the size after layout, if the widget is QtWidgets.QGraphicsView I can call adjustSize() to get it, but when the widget change to PhotoViewer(created by myself, inherit QtWidgets.QGraphicsView) then I don't know how to achieve the size after layout.