Scoodood | 2020-09-25 05:16:36 UTC | #1
The default QSplitter Widget only has splitterMoved signal. I would like to add a doubleClicked signal so that I can make the QSplitter widget can move all the way to the left on a double clicking event, and then double clicking it again will restore to its previous position. Below are my starter code. Any idea how to go from here?
from PySide2 import QtWidgets, QtCore
class Example(QtWidgets.QWidget):
def __init__(self):
super().__init__()
splitter = QtWidgets.QSplitter(QtCore.Qt.Horizontal)
textedit1 = QtWidgets.QTextEdit()
textedit2 = QtWidgets.QTextEdit()
splitter.addWidget(textedit1)
splitter.addWidget(textedit2)
splitter.setSizes([200,200])
layout = QtWidgets.QVBoxLayout()
layout.addWidget(splitter)
self.setLayout(layout)
splitter.splitterMoved.connect(self.handler)
# trying to do something like this...
#splitter.doubleClicked.connect(self.handler)
def handler(self, pos):
print('pos', pos)
if __name__ == '__main__':
app = QtWidgets.QApplication([])
w = Example()
w.show()
app.exec_()
martin | 2020-09-30 20:45:37 UTC | #2
Hey @Scoodood I knocked together a simple custom widget for this -- it implements a double click event handler which stores and restores a slide position.
class ToggleSplitter(QtWidgets.QSplitter):
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
# Store the previos size of the left hand panel.
self._previous_state = None
def mouseDoubleClickEvent(self, e):
sizes = self.sizes()
if sizes[0] == 0 and self._previous_state:
sizes = self._previous_state
else:
# Store the size so we can return to it.
self._previous_state = sizes[:] # store copy so change below doesn't affect stored.
sizes[0] = 0
self.setSizes(sizes)
If you run it you'll notice the slight problem -- you can't actually double click on the splitter itself, just on the (tiny space) in the frame next to it. Move your mouse around the edge of the splitter until it turns into an arrow, then double click.
The problem is that QSplitter is a compound widget with the handles themselves QSplitterHandle objects. However, QSplitter has a createHandle method we can override allowing us to return our own custom handles -- and we can put our double-click handler on there instead.
Full working example ...
Also available from Leanpub and Amazon Paperback
Purchasing Power Parity
Developers in [[ country ]] get [[ discount.discount_pc ]]% OFF on all books & courses with code [[ discount.coupon_code ]]from PySide2 import QtWidgets, QtCore
class ToggleSplitterHandle(QtWidgets.QSplitterHandle):
def mouseDoubleClickEvent(self, e):
self.parent().toggle_collapse()
class ToggleSplitter(QtWidgets.QSplitter):
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
# Store the previos size of the left hand panel.
self._previous_state = None
def createHandle(self):
return ToggleSplitterHandle(self.orientation(), self)
def toggle_collapse(self):
sizes = self.sizes()
if sizes[0] == 0 and self._previous_state:
sizes = self._previous_state
else:
# Store the size so we can return to it.
self._previous_state = sizes[:] # store copy so change below doesn't affect stored.
sizes[0] = 0
self.setSizes(sizes)
class Example(QtWidgets.QWidget):
def __init__(self):
super().__init__()
splitter = ToggleSplitter(QtCore.Qt.Horizontal)
textedit1 = QtWidgets.QTextEdit()
textedit2 = QtWidgets.QTextEdit()
splitter.addWidget(textedit1)
splitter.addWidget(textedit2)
splitter.setSizes([200,200])
layout = QtWidgets.QVBoxLayout()
layout.addWidget(splitter)
self.setLayout(layout)
splitter.splitterMoved.connect(self.handler)
def handler(self, pos):
print('pos', pos)
if __name__ == '__main__':
app = QtWidgets.QApplication([])
w = Example()
w.show()
app.exec_()
Scoodood | 2020-09-30 20:59:09 UTC | #3
PyQt/PySide 1:1 Coaching with Martin Fitzpatrick — Save yourself time and frustration. Get one on one help with your Python GUI projects. Working together with you I'll identify issues and suggest fixes, from bugs and usability to architecture and maintainability.
Thanks @martin. This is awesome!!
Packaging Python Applications with PyInstaller by Martin Fitzpatrick — This step-by-step guide walks you through packaging your own Python applications from simple examples to complete installers and signed executables.
