python - Resize column width to fit into the QTableWidget pyqt

Question

I've googled around but I'm not able to find a solution to my problem.

I have a QTableWidget with 2 columns and what I'm trying to do is to make them visible to the whole widget without the horizontal scrollbar to appear.

With a picture it should be all clear:

I have used Qt Designer to create the UI and some code to fill all the widgets and other stuff.

So, first I resized th2 2 columns to the content with:

self.statTable.resizeColumnToContents(0)
self.statTable.resizeColumnToContents(1)

and it works, but then the Widget is not resizing to the 2 columns width.

Answer 1

This has a very easy solution in PyQt5. All you need to do is set the size adjust policy on the table when initialising the UI, and it will automatically resize to fit the contents. This can either be done via Qt Designer (in the QAbstractScrollArea section of the Property Editor), or programmatically, like this:

    self.statTable.setSizeAdjustPolicy(
        QtWidgets.QAbstractScrollArea.AdjustToContents)

You then just need to do:

    self.statTable.resizeColumnsToContents()

whenever the table is re-populated.

For PyQt4, everything has to be calculated manually, and a few hacks are also required to get completely consistent results. The demo script below works okay for me, but YMMV:

import random
from PyQt4 import QtCore, QtGui

class Window(QtGui.QWidget):
    def __init__(self):
        super(Window, self).__init__()
        self.table = QtGui.QTableWidget(5, 2, self)
        self.button = QtGui.QPushButton('Populate', self)
        self.button.clicked.connect(self.populate)
        layout = QtGui.QGridLayout(self)
        layout.addWidget(self.table, 0, 0)
        layout.addWidget(self.button, 1, 0)
        layout.setColumnStretch(1, 1)

    def populate(self):
        words = 'Red Green Blue Yellow Black White Purple'.split()
        length = random.randint(2, len(words))
        self.table.setRowCount(random.randint(3, 30))
        for column in range(self.table.columnCount()):
            for row in range(self.table.rowCount()):
                item = QtGui.QTableWidgetItem(' '.join(
                    random.sample(words, random.randint(1, length))))
                self.table.setItem(row, column, item)

        self.table.setVisible(False)
        self.table.verticalScrollBar().setValue(0)
        self.table.resizeColumnsToContents()
        self.table.setVisible(True)
        self.setTableWidth()

    def setTableWidth(self):
        width = self.table.verticalHeader().width()
        width += self.table.horizontalHeader().length()
        if self.table.verticalScrollBar().isVisible():
            width += self.table.verticalScrollBar().width()
        width += self.table.frameWidth() * 2
        self.table.setFixedWidth(width)

    def resizeEvent(self, event):
        self.setTableWidth()
        super(Window, self).resizeEvent(event)

if __name__ == '__main__':

    import sys
    app = QtGui.QApplication(sys.argv)
    window = Window()
    window.setGeometry(700, 150, 800, 400)
    window.show()
    sys.exit(app.exec_())