February 2019
Beginner
136 pages
3h 7m
English
Content preview from Getting Started with Qt 5
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Single signal, multiple slots
In this section, we shall concern ourselves with how to connect a single signal to multiple slots.
Examine the following program:
#include <QApplication>#include <QVBoxLayout>#include <QLabel>#include <QDial>#include <QLCDNumber>int main(int argc, char *argv[]){ QApplication app(argc, argv); QWidget *window = new QWidget; QVBoxLayout *layout = new QVBoxLayout; QLabel *volumeLabel = new QLabel("0"); QDial *volumeDial= new QDial; QLCDNumber *volumeLCD = new QLCDNumber; volumeLCD->setPalette(Qt::red); volumeLabel->setAlignment(Qt::AlignHCenter); volumeDial->setNotchesVisible(true); volumeDial->setMinimum(0); volumeDial->setMaximum(100); layout->addWidget(volumeDial); layout->addWidget(volumeLabel); layout->addWidget(volumeLCD); ...Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.