I have a number of different signals connected to one slot. Is there any disconnect function that can be used to disconnect everything connected to a specific slot?
Widget.signal.connect (slot) Which means that whenever a signal is triggered by a widget, the connected slot function will be executed. In summary, signals and slots are used by Qt to communicate between objects and facilitate component reusability and interactivity. QtCore.SIGNAL and QtCore.SLOT macros allow Python to interface with Qt signal and slot delivery mechanisms. This is the old way of using signals and slots. The example below uses the well known clicked signal from a QPushButton. The connect method has a non python-friendly syntax. These signals can be connected to any callable, that is, to any function or method, including Qt slots; they can also be connected using the SLOT syntax, with a slotSignature. PyQt checks to see whether the signal is a Qt signal, and if it is not it assumes it is a Python signal.
For example:
@QObject::connect(object1, SIGNAL(a()), receiver, SLOT(slot()));
QObject::connect(object2, SIGNAL(b()), receiver, SLOT(slot()));
QObject::connect(object3, SIGNAL(c()), receiver, SLOT(slot()));@
Qt Designer Python Signal Slot
Now I want a function to disconnect all the signals from receiver's slot(). There is an option:
@QObject::disconnect(receiver, SLOT(slot()));@
but this connects only the signals in the current object. I want to disconnect ALL signals, without knowing the objects that are connected to the slot.
Any ideas?
Python Qt Signal Slot
28 Aug 2011 Matteo Mattei pythonpysideqtthreadIn these days I started studying PySide. After some days spent in reading lot of stuff, I thought that a real example could be useful for who intends to start learning PySide as well. In this example I can show you how you can implement a custom signal (MySignal) together with the usage of threads with QThread.
The following code creates a window with two buttons: the first starts and stop a thread (MyThread) that runs a batch that prints a point in the stdout every seconds continuously. The second button lets you only start another thread (MyLongThread) that prints an asterisk in the stdout every second for 10 seconds.
Qt Python Signal Slot Machine
This example uses the api version 2 (introduced with PyQt 4.5) to connect signals to slots.
For more information you can look at:
- QThread documentation: http://doc.qt.nokia.com/latest/qthread.html
- PySide signals and slots: http://developer.qt.nokia.com/wiki/Signals_and_Slots_in_PySide
- PyQt api 2 on PySide: http://www.pyside.org/docs/pseps/psep-0101.html
Widget.signal.connect (slot) Which means that whenever a signal is triggered by a widget, the connected slot function will be executed. In summary, signals and slots are used by Qt to communicate between objects and facilitate component reusability and interactivity. QtCore.SIGNAL and QtCore.SLOT macros allow Python to interface with Qt signal and slot delivery mechanisms. This is the old way of using signals and slots. The example below uses the well known clicked signal from a QPushButton. The connect method has a non python-friendly syntax. These signals can be connected to any callable, that is, to any function or method, including Qt slots; they can also be connected using the SLOT syntax, with a slotSignature. PyQt checks to see whether the signal is a Qt signal, and if it is not it assumes it is a Python signal.
For example:
@QObject::connect(object1, SIGNAL(a()), receiver, SLOT(slot()));
QObject::connect(object2, SIGNAL(b()), receiver, SLOT(slot()));
QObject::connect(object3, SIGNAL(c()), receiver, SLOT(slot()));@
Qt Designer Python Signal Slot
Now I want a function to disconnect all the signals from receiver's slot(). There is an option:
@QObject::disconnect(receiver, SLOT(slot()));@
but this connects only the signals in the current object. I want to disconnect ALL signals, without knowing the objects that are connected to the slot.
Any ideas?
Python Qt Signal Slot
28 Aug 2011 Matteo Mattei pythonpysideqtthreadIn these days I started studying PySide. After some days spent in reading lot of stuff, I thought that a real example could be useful for who intends to start learning PySide as well. In this example I can show you how you can implement a custom signal (MySignal) together with the usage of threads with QThread.
The following code creates a window with two buttons: the first starts and stop a thread (MyThread) that runs a batch that prints a point in the stdout every seconds continuously. The second button lets you only start another thread (MyLongThread) that prints an asterisk in the stdout every second for 10 seconds.
Qt Python Signal Slot Machine
This example uses the api version 2 (introduced with PyQt 4.5) to connect signals to slots.
For more information you can look at:
- QThread documentation: http://doc.qt.nokia.com/latest/qthread.html
- PySide signals and slots: http://developer.qt.nokia.com/wiki/Signals_and_Slots_in_PySide
- PyQt api 2 on PySide: http://www.pyside.org/docs/pseps/psep-0101.html