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How to allow resizing of QMessageBox in PyQt4
(5 answers)
Closed 9 months ago.
Is there a way to make a resizable QMessageBox in PyQt? How can I do this?
If I write this code:
mbox = QMessageBox()
mbox.setText('tesdt')
mbox.setTitle('test')
mbox.exec()
The messagebox cannot be resized. How can I make it resizable?
You can create an inherited class from QMessageBox() and modify it to be resizable like I do in this code:
import sys
from PyQt5.QtWidgets import (
QApplication,
QPushButton,
QWidget,
QMessageBox,
QVBoxLayout,
QTextEdit,
QSizePolicy
)
class MyMessageBox(QMessageBox):
def __init__(self):
QMessageBox.__init__(self)
self.setSizeGripEnabled(True)
def event(self, e):
result = QMessageBox.event(self, e)
self.setMinimumHeight(0)
self.setMaximumHeight(16777215)
self.setMinimumWidth(0)
self.setMaximumWidth(16777215)
self.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Expanding)
textEdit = self.findChild(QTextEdit)
if textEdit != None :
textEdit.setMinimumHeight(0)
textEdit.setMaximumHeight(16777215)
textEdit.setMinimumWidth(0)
textEdit.setMaximumWidth(16777215)
textEdit.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Expanding)
return result
class Window(QWidget):
def __init__(self):
super().__init__()
self.setWindowTitle("QGridLayout Example")
self.button = QPushButton("Show message")
self.layout2 = QVBoxLayout()
self.layout2.addWidget(self.button)
self.setLayout(self.layout2)
self.button.clicked.connect(self.show_message)
def show_message(self):
self.mbox = MyMessageBox()
self.mbox.setIcon(MyMessageBox.Information)
self.mbox.setStandardButtons(MyMessageBox.Ok)
self.mbox.setText('test')
self.mbox.setWindowTitle('test')
self.mbox.show()
if __name__ == "__main__":
app = QApplication(sys.argv)
window = Window()
window.show()
sys.exit(app.exec_())
Related
In pyqtgraph, Docks can be torn out of the DockArea by dragging or double clicking. The popups use a default icon. I would like to define my own icon. In the code below I set the application window. The same code has no effect on the dock, though there is no error message.
import sys
from PyQt5.QtWidgets import QWidget, QApplication, QVBoxLayout
from pyqtgraph.dockarea import Dock, DockArea
from PyQt5.QtGui import QIcon
class Foo(QWidget):
def __init__(self, parent=None):
super().__init__(parent)
self.setWindowIcon(QIcon('direction'))
lay = QVBoxLayout(self)
da = DockArea()
d = Dock("Dock")
d.setWindowIcon(QIcon('direction')) # no effect
da.addDock(d)
lay.addWidget(da)
if __name__ == "__main__":
app = QApplication(sys.argv)
w = Foo()
w.show()
sys.exit(app.exec_())
I looked in the source code of Dock and DockArea of pyqtgraph and found out I had to overwrite floatDock function.
I created a function
def floatDockPatched(self, dock):
"""Removes *dock* from this DockArea and places it in a new window."""
area = self.addTempArea()
area.win.resize(dock.size())
area.win.setWindowIcon(QIcon("res/haip.png"))
area.win.setWindowTitle(dock.label.text())
area.moveDock(dock, 'top', None)
and assigned it to the class as overwrite
DockArea.floatDock = floatDockPatched
I want to mimic the behavior of the window top-right corner actions when hovering over the minimize-maximize-close buttons.
So I have created a QMenuBar that contains 3 QActions.
class WindowMenuActions(QMenuBar):
def __init__(self):
super(WindowMenuActions, self).__init__()
minimize_action = QAction(self)
minimize_action.setIcon(_MINIMIZE_ICON)
maximize_action = QAction(self)
maximize_action.setIcon(_MAXIMIZE_ICON)
exit_action = QAction(self)
exit_action.setIcon(_CLOSE_ICON)
self.addAction(minimize_action)
self.addAction(maximize_action)
self.addAction(exit_action)
And set the background color when hovering with stylesheet (it is applied to the entire QApplication):
I want the close button to have a different highlight color, so I tried setting a boolean property on the exit_action to change the color only for that specific item, but it does not do any effect (in fact, if I add the property in the stylesheet it doesn't even consider the stylesheet values)
Any idea of how to achieve this?
To extend the question, I would not only use this for the minimize-maximize-close actions, but also to understand how to apply different hover/selected colors on QActions in the QMenuBar (not in the QMenu, which I already found a solution for that).
This is an running example:
from PySide2.QtWidgets import QMenuBar, QAction, QStyle, QApplication, QMainWindow
from PySide2.QtCore import Qt
class WindowMenuActions(QMenuBar):
def __init__(self):
super(WindowMenuActions, self).__init__()
minimize_action = QAction(self)
_MINIMIZE_ICON = self.style().standardIcon(QStyle.SP_TitleBarMinButton)
_MAXIMIZE_ICON = self.style().standardIcon(QStyle.SP_TitleBarMaxButton)
_EXIT_ICON = self.style().standardIcon(QStyle.SP_TitleBarCloseButton)
minimize_action.setIcon(_MINIMIZE_ICON)
minimize_action.setProperty('exit_action', False)
maximize_action = QAction(self)
maximize_action.setProperty('exit_action', False)
maximize_action.setIcon(_MAXIMIZE_ICON)
exit_action = QAction(self)
exit_action.setProperty('exit_action', True)
exit_action.setIcon(_EXIT_ICON)
self.addAction(minimize_action)
self.addAction(maximize_action)
self.addAction(exit_action)
self.setStyleSheet(
'QMenuBar::item:selected {'
'background-color: grey;'
'}'
'QMenuBar::item[exit_action=true]:selected {'
' background-color: red;'
'}')
if __name__ == "__main__":
import sys
app = QApplication(sys.argv)
main = QMainWindow()
main.setMenuBar(WindowMenuActions())
main.show()
sys.exit(app.exec_())
To anyone interested, I sorted by inheriting from a regular QWidget instead of a QMenuBar and using QToolButton instead of QAction.
Working example:
from PySide2.QtWidgets import QMenuBar, QStyle, QApplication, QMainWindow, QWidget, QHBoxLayout, QToolButton, QMenu
from PySide2.QtCore import Qt
class MenuBar(QMenuBar):
def __init__(self):
super(MenuBar, self).__init__()
self.addMenu(QMenu('File'))
self.addMenu(QMenu('Help'))
self.setCornerWidget(WindowMenuActions(self))
class WindowMenuActions(QWidget):
def __init__(self, parent=None):
super(WindowMenuActions, self).__init__(parent)
_MINIMIZE_ICON = self.style().standardIcon(QStyle.SP_TitleBarMinButton)
_MAXIMIZE_ICON = self.style().standardIcon(QStyle.SP_TitleBarMaxButton)
_EXIT_ICON = self.style().standardIcon(QStyle.SP_TitleBarCloseButton)
minimize = QToolButton(self)
minimize.setIcon(_MINIMIZE_ICON)
maximize = QToolButton(self)
maximize.setIcon(_MAXIMIZE_ICON)
exit_action = QToolButton(self)
exit_action.setProperty('exit_button', True)
exit_action.setIcon(_EXIT_ICON)
layout = QHBoxLayout()
layout.addWidget(minimize)
layout.addWidget(maximize)
layout.addWidget(exit_action)
self.setLayout(layout)
self.setStyleSheet(
'QToolButton:hover {'
' background: grey;'
'}'
'QToolButton[exit_button=true]:hover {'
' background: red;'
'}'
)
if __name__ == "__main__":
import sys
app = QApplication(sys.argv)
main = QMainWindow()
main.setWindowFlags(Qt.FramelessWindowHint)
main.setMenuBar(MenuBar())
main.show()
sys.exit(app.exec_())
I have a menu bar with a shortcut associated to it. I want to hide the menu bar but in that case the associated shortcut will be disabled. Here is an example:
import sys
from PyQt5.QtWidgets import QApplication, QMainWindow, QAction
class Window(QMainWindow):
def __init__(self):
super().__init__()
self.InitWindow()
def InitWindow(self):
mainMenu = self.menuBar()
fileMenu = mainMenu.addMenu("&File")
mainMenu.hide() # comment it and the shortcut 'q' will work
quitItem = QAction("Quit", self)
quitItem.setShortcut("Q")
quitItem.triggered.connect(self.close)
fileMenu.addAction(quitItem)
if __name__ == "__main__":
App = QApplication(sys.argv)
window = Window()
window.show()
sys.exit(App.exec())
If you put the line mainMenu.hide() in a comment, i.e. if the menu bar is shown, then the app. will quit with the shortcut 'q'. How could I keep the shortcuts of a hidden widget?
In the app. I want to add full-screen support, and in that case I want to hide the menu bar, but also, I want to keep the shortcuts in full-screen mode.
I found a working solution. The idea is the following: the main window has a shortcut ('q' in the example), and the menu bar also has this shortcut. To avoid conflict, disable the window's shortcut if the menu bar is present. If the menu bar is hidden, enable the window's shortcut.
import sys
from PyQt5.QtCore import Qt
from PyQt5.QtGui import QKeySequence
from PyQt5.QtWidgets import QApplication, QMainWindow, QAction, QShortcut
class Window(QMainWindow):
def __init__(self):
super().__init__()
self.shortcutQuit = QShortcut(QKeySequence("q"), self)
self.shortcutQuit.activated.connect(self.close)
self.shortcutQuit.setEnabled(False) # disable it if the menu bar is visible
self.InitWindow()
def InitWindow(self):
self.mainMenu = self.menuBar()
fileMenu = self.mainMenu.addMenu("&File")
hideItem = QAction("Hide Menu Bar", self)
hideItem.setShortcut("h")
hideItem.triggered.connect(self.my_hide)
quitItem = QAction("Quit", self)
quitItem.setShortcut("Q")
quitItem.triggered.connect(self.close)
fileMenu.addAction(hideItem)
fileMenu.addAction(quitItem)
def my_hide(self):
self.mainMenu.hide()
self.shortcutQuit.setEnabled(True)
if __name__ == "__main__":
App = QApplication(sys.argv)
window = Window()
window.show()
sys.exit(App.exec())
I have a main window which contains a main widget, to which a vertical layout is set. To the layout is added a QTableWidget only (for the moment).
When I start the application and call show on the main_window, only part of the QTableWidget is shown. I can extend the window manually to see it all, but I would like the window to have its size nicely adapted to the size of the QTableWidget.
Googling the question found a lot of posts on how to use resize to an arbitrary size, and call to resize(int) works fine, but this is not quite what I am asking
Lots of other posts are not explicit enough, e.g "use sizePolicy" or "use frameGeometry" or "use geometry" or "use sizeHint". I am sure all of them may be right, but an example on how to would be awesome.
You can do something like this, from within your MainWindow after placing all the elements you need in the layout:
self.setFixedSize(self.layout.sizeHint())
This will set the size of the MainWindow to the size of the layout, which is calculated using the size of widgets that are arranged in the layout.
I think overriding sizeHint() on the QTableWidget is the key:
import sys
from PyQt5.QtCore import QSize
from PyQt5.QtWidgets import QApplication, QMainWindow, QTableWidget
class Table(QTableWidget):
def sizeHint(self):
horizontal = self.horizontalHeader()
vertical = self.verticalHeader()
frame = self.frameWidth() * 2
return QSize(horizontal.length() + vertical.width() + frame,
vertical.length() + horizontal.height() + frame)
class Main(QMainWindow):
def __init__(self, parent=None):
super(Main, self).__init__(parent)
top = Table(3, 5, self)
self.setCentralWidget(top)
if __name__ == '__main__':
app = QApplication(sys.argv)
main = Main()
main.show()
sys.exit(app.exec_())
You can use sizeHint() but not as stated in the other answers. sizeHint() returns a QSize object with a width and height. Let's say you have a main window mainWindow and a widget inside it called content. If your resizing involves content height to get bigger, you can fit the mainWindow to it like this:
mainWindow.resize(mainWindow.sizeHint().width,
mainWindow.size().height() + content.sizeHint().height());
Old but i experienced this a while back and seeing how the answers here didn't exactly work for me.
Here's what i did:
Please make sure you have the central widget for the 'mainwindow' set properly and the parent of the layout is the central widget,
Then set a sizepolicy for the mainwindow/widget as you wish.
from PyQt5 import QtCore, QtGui, QtWidgets
import sys
class RandomWidget(QtWidgets.QWidget):
def __init__(self, parent=None):
super(RandomWidget, self).__init__(parent)
self.layout = QtWidgets.QVBoxLayout()
self.setLayout(self.layout)
self.ui()
self.layout.addWidget(self.table)
self.layout.addWidget(self.table2)
def ui(self):
self.table = QtWidgets.QTableWidget()
self.table.setMinimumSize(800,200)
self.table2 = QtWidgets.QTableWidget()
class Mainwindow(QtWidgets.QMainWindow):
def __init__(self):
self.widget = None
super(Mainwindow, self).__init__()
self.setWindowTitle('test')
def ui(self):
self.setCentralWidget(self.widget)
self.show()
if __name__ == "__main__":
app = QtWidgets.QApplication(sys.argv)
Window = Mainwindow()
Window.widget = RandomWidget(Window)
Window.ui()
sys.exit(app.exec_())
I have a Interface that has 4 buttons across the top of the screen, and below that I have QFrame. I want to change the layout in the QFrame based on what button is pressed. For instance, if Button_1 is pressed show a TextEdit Widget, if Button_2 is pressed show a ListViewWidget.
Does anyone have any idea on how this can be done?
Thank You Very Much!
Use a QStackedLayout to store your widgets. Then you can change to the one with setCurrentIndex. Alternatively, you can use a QStackedWidget in place of your QFrame.
A simple example:
import sys
from PySide import QtGui
class Window(QtGui.QWidget):
def __init__(self, parent=None):
super(Window, self).__init__(parent)
self.textEdit = QtGui.QTextEdit('Text Edit')
self.listWidget = QtGui.QListWidget()
self.listWidget.addItem('List Widget')
self.label = QtGui.QLabel('Label')
self.stackedLayout = QtGui.QStackedLayout()
self.stackedLayout.addWidget(self.textEdit)
self.stackedLayout.addWidget(self.listWidget)
self.stackedLayout.addWidget(self.label)
self.frame = QtGui.QFrame()
self.frame.setLayout(self.stackedLayout)
self.button1 = QtGui.QPushButton('Text Edit')
self.button1.clicked.connect(lambda: self.stackedLayout.setCurrentIndex(0))
self.button2 = QtGui.QPushButton('List Widget')
self.button2.clicked.connect(lambda: self.stackedLayout.setCurrentIndex(1))
self.button3 = QtGui.QPushButton('Label')
self.button3.clicked.connect(lambda: self.stackedLayout.setCurrentIndex(2))
buttonLayout = QtGui.QHBoxLayout()
buttonLayout.addWidget(self.button1)
buttonLayout.addWidget(self.button2)
buttonLayout.addWidget(self.button3)
layout = QtGui.QVBoxLayout(self)
layout.addLayout(buttonLayout)
layout.addWidget(self.frame)
if __name__ == '__main__':
app = QtGui.QApplication(sys.argv)
w = Window()
w.show()
sys.exit(app.exec_())
Something like...
myframe.layout().removeWidget(mywidget)
mywidget = QTextEdit()
myframe.layout().addWidget(myWidget)