How to enable QMessageBox resizing in PyQt4

Question

I use a nice feature in the QMessageBox to show the detailed text to the user if desired. However, the window after expansion is still quite small, and you immediately try to resize the window to see more details. Even after setting what I think is the correct settings, this will not allow you to resize.

Here is the corresponding PyQt4 code snippet:

mb = QMessageBox()
mb.setText("Results written to '%s'" % filename)
mb.setDetailedText(str(myData))
mb.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Expanding)
mb.setSizeGripEnabled(True)

Am I missing a step and / or is it even possible?

Answer 1

, . , . serge_gubenko. , .

# Safe since everything in the namespace begins with 'Q'
from PyQt4.QtGui import *

class MyMessageBox(QMessageBox):

    # This is a much better way to extend __init__
    def __init__(self, *args, **kwargs):            
        super(MyMessageBox, self).__init__(*args, **kwargs)
        # Anything else you want goes below

    # We only need to extend resizeEvent, not every event.
    def resizeEvent(self, event):

        result = super(MyMessageBox, self).resizeEvent(event)

        details_box = self.findChild(QTextEdit)
        # 'is not' is better style than '!=' for None
        if details_box is not None:
            details_box.setFixedSize(details_box.sizeHint())

        return result

Answer 2

, PLS, , :

class MyMessageBox(QtGui.QMessageBox):
    def __init__(self):
        QtGui.QMessageBox.__init__(self)
        self.setSizeGripEnabled(True)

    def event(self, e):
        result = QtGui.QMessageBox.event(self, e)

        self.setMinimumHeight(0)
        self.setMaximumHeight(16777215)
        self.setMinimumWidth(0)
        self.setMaximumWidth(16777215)
        self.setSizePolicy(QtGui.QSizePolicy.Expanding, QtGui.QSizePolicy.Expanding)

        textEdit = self.findChild(QtGui.QTextEdit)
        if textEdit != None :
            textEdit.setMinimumHeight(0)
            textEdit.setMaximumHeight(16777215)
            textEdit.setMinimumWidth(0)
            textEdit.setMaximumWidth(16777215)
            textEdit.setSizePolicy(QtGui.QSizePolicy.Expanding, QtGui.QSizePolicy.Expanding)

        return result

, :

mb = MyMessageBox()
mb.setText("Results written to '%s'" % 'some_file_name')
mb.setDetailedText('some text')
mb.exec_()

, ,

Answer 3

, Linux Gnome 2. , " " , . " " - , , pov:

bool MyMessageBox::event(QEvent* e)
{
    bool result = QMessageBox::event(e);
    // force resizing back on, QMessageBox keeps turning it off:
    if (maximumWidth() != QWIDGETSIZE_MAX) {
        QTextEdit *textEdit = findChild<QTextEdit*>();
        if (textEdit && textEdit->isVisible()) {
            textEdit->setMaximumSize(QWIDGETSIZE_MAX, QWIDGETSIZE_MAX);
            textEdit->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
            setMaximumSize(QWIDGETSIZE_MAX, QWIDGETSIZE_MAX);
            setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
        } else {
            setMaximumWidth(QWIDGETSIZE_MAX);
            setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed);
        }
    }
    return result;
}