71 lines
1.9 KiB
C++
71 lines
1.9 KiB
C++
#include "widget.h"
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#include "ui_widget.h"
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#include "qpushbutton.h"
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#include "qsignalmapper.h"
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#include "qdatetime.h"
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#include "qdebug.h"
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#define TIMEMS QTime::currentTime().toString("hh:mm:ss zzz")
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Widget::Widget(QWidget *parent) : QWidget(parent), ui(new Ui::Widget)
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{
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ui->setupUi(this);
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this->initBtn();
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}
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Widget::~Widget()
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{
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delete ui;
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}
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void Widget::initBtn()
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{
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QSignalMapper *signMap = new QSignalMapper(this);
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connect(signMap, SIGNAL(mapped(QString)), this, SLOT(doBtn(QString)));
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int x = 5, y = -25;
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for (int i = 0; i < 1000; ++i) {
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//动态设置坐标
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x += 80;
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if (i % 10 == 0) {
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x = 5;
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y += 30;
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}
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QPushButton *btn = new QPushButton(this);
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btn->setObjectName(QString("btn_%1").arg(i + 1));
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btn->setText(QString("text_%1").arg(i + 1));
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btn->setGeometry(x, y, 75, 25);
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//方法0: 每个按钮关联到一个独立的槽,代码量大不可取放弃
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//方式1: 绑定到一个槽函数
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connect(btn, SIGNAL(clicked(bool)), this, SLOT(doBtn()));
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//方式2: 通过 QSignalMapper 转发信号
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connect(btn, SIGNAL(clicked(bool)), signMap, SLOT(map()));
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signMap->setMapping(btn, btn->objectName());
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//方法3: 用 lambda 表达式
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#if (QT_VERSION >= QT_VERSION_CHECK(5,6,0))
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connect(btn, &QPushButton::clicked, [btn] {
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QString name = btn->objectName();
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qDebug() << TIMEMS << "doBtn3" << name;
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});
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connect(btn, &QPushButton::clicked, [=]() {
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QString name = btn->objectName();
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qDebug() << TIMEMS << "doBtn3" << name;
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});
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#endif
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}
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}
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void Widget::doBtn()
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{
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QPushButton *btn = (QPushButton *)sender();
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QString name = btn->objectName();
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qDebug() << TIMEMS << "doBtn1" << name;
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}
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void Widget::doBtn(const QString &name)
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{
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qDebug() << TIMEMS << "doBtn2" << name;
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}
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