qsignalmapper

pyqt: A correct way to connect multiple signals to the same function in pyqt (QSignalMapper not applicable)

由 雨燕双飞 提交于 2020-07-17 12:41:39
问题 I've ready many posts on how to connect multiple signals to the same event handler in python and pyqt. For example, connecting several buttons or comboboxes to the same function. Many examples show how to do this with QSignalMapper, but it is not applicable when the signal carries a parameter, as with combobox.currentIndexChanged Many people suggest it can be made with lambda. It is a clean and pretty solution, I agree, but nobody mentions that lambda creates a closure, which holds a

pyqt: A correct way to connect multiple signals to the same function in pyqt (QSignalMapper not applicable)

由 筅森魡賤 提交于 2020-07-17 12:40:25
问题 I've ready many posts on how to connect multiple signals to the same event handler in python and pyqt. For example, connecting several buttons or comboboxes to the same function. Many examples show how to do this with QSignalMapper, but it is not applicable when the signal carries a parameter, as with combobox.currentIndexChanged Many people suggest it can be made with lambda. It is a clean and pretty solution, I agree, but nobody mentions that lambda creates a closure, which holds a

Using QSignalMapper

由 。_饼干妹妹 提交于 2020-04-07 05:52:10
问题 I tried to make a simple example to help understand how the concept of QSignalMapping works in PySide. I would like to dynamically create a series of buttons by iterating through a loop, and when the user pushes one of the buttons, I can activate a method that returns the appropriate label for the button that was pressed. from PySide2 import QtWidgets,QtCore,QtGui fruit_list = ["apples","oranges","pears"] def fruit_button_event(): print "this is the pressed button's label" def main(): for

How to use QSignalMapper to map integers to numerals?

由 为君一笑 提交于 2019-12-12 00:11:12
问题 I have problems with a simple application in Qt. The app looks like a simple calculator wtih buttons (digits from 0 to 9). Once a button is clicked application shall display on the application’s output the corresponding number as a digit and as a numeral (a word). I need to use QSignalMapper . How can I solve this? My code so far: QLayout* Widget::createButtons() { QGridLayout *lt = new QGridLayout(this); QSignalMapper *signalMapper = new QSignalMapper(this); connect(signalMapper, SIGNAL

How does QSignalMapper work?

由 …衆ロ難τιáo~ 提交于 2019-11-30 12:13:04
问题 After my post here : Associate signal and slot to a qcheckbox create dynamically I need to associate : • The signal clicked() when I click on a qCheckBox to my function cliqueCheckBox(QTableWidget *monTab, int ligne, QCheckBox *pCheckBox) To do so, I have to use QSignalMapper , after two hours of trying to understand how it works, I can't have a good result, here's the code I make, this is obviously wrong : QSignalMapper *m_sigmapper = new QSignalMapper(this); QObject::connect(pCheckBox,

How does QSignalMapper work?

由 浪尽此生 提交于 2019-11-30 04:14:01
After my post here : Associate signal and slot to a qcheckbox create dynamically I need to associate : • The signal clicked() when I click on a qCheckBox to my function cliqueCheckBox(QTableWidget *monTab, int ligne, QCheckBox *pCheckBox) To do so, I have to use QSignalMapper , after two hours of trying to understand how it works, I can't have a good result, here's the code I make, this is obviously wrong : QSignalMapper *m_sigmapper = new QSignalMapper(this); QObject::connect(pCheckBox, SIGNAL(mapped(QTableWidget*,int, QCheckBox*)), pCheckBox, SIGNAL(clicked())); QObject::connect(this, SIGNAL

Passing an argument to a slot

由 早过忘川 提交于 2019-11-25 23:44:33
问题 I want to override mouseReleaseEvent with a bunch of QActions and QMenus... connect(action1, SIGNAL(triggered()), this, SLOT(onStepIncreased())); connect(action5, SIGNAL(triggered()), this, SLOT(onStepIncreased())); connect(action10, SIGNAL(triggered()), this, SLOT(onStepIncreased())); connect(action25, SIGNAL(triggered()), this, SLOT(onStepIncreased())); connect(action50, SIGNAL(triggered()), this, SLOT(onStepIncreased())); So I want to pass an argument to the slot onStepIncreased (as you
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