使用QSignalMapper映射多信号到同一个槽

最新推荐文章于 2021-01-08 22:13:09 发布

转载最新推荐文章于 2021-01-08 22:13:09 发布 · 805 阅读

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本文通过实例详细介绍了如何在PyQt4中利用SignalMapper组件实现信号与槽的映射，尤其关注按钮点击事件的处理。展示了C++与Python两种语言下SignalMapper的用法，包括设置信号映射、连接信号与槽以及处理映射后的信号。

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关键词：python qt4 信号和槽 SignalMapper

还是举例说明比较好写：

1）C++版本：

QSignalMapper *signalMapper = new QSignalMapper(this);
    for (i = 0; i < 10; i++) {
        button = new QPushButton(QObject::tr(buttonName));
        signalMapper->setMapping(button[i], i);
        connect(button, SIGNAL(clicked()), signalMapper, SLOT(map()));
    }
    connect(signalMapper, SIGNAL(mapped(int)), this, SLOT(handle(int)));
2）pyqt4版本：

import sys
from PyQt4.QtCore import *
from PyQt4.QtGui import *

class Window(QWidget):

    def __init__(self, parent = None):
    
        QWidget.__init__(self, parent)
        
        layout = QVBoxLayout(self)
        mapper = QSignalMapper(self)
        
        for i in range(5):
        
            button = QPushButton()
            button.setText("Button " + str(i))
            self.connect(button, SIGNAL("clicked()"), mapper, SLOT("map()"))
            if i % 2 == 0:
                mapper.setMapping(button, str(i))
            else:
                mapper.setMapping(button, i)
            layout.addWidget(button)
        
        self.connect(mapper, SIGNAL("mapped(const QString &)"), self.stringMapped)
        self.connect(mapper, SIGNAL("mapped(int)"), self.intMapped)
    
    def stringMapped(self, value):
    
        print "stringMapped", value
    
    def intMapped(self, value):
    
        print "intMapped", value
    

if __name__ == "__main__":

    app = QApplication(sys.argv)
    window = Window()
    window.show()
    sys.exit(app.exec_())