标签:qt5 qradiobutton
本例程介绍QRadioButton的使用,包括QRadioButton的分组、多个QRadioButton控件响应同一个槽函数、QRadioButton的ID设置从而避免繁琐的判断。
一、在UI界面添加如下控件:
二、对QRadioButton控件进行分组
QRadioButton的分组有多重方法,如采用组合框、QWidge等,下面介绍采用QButtonGroup方法来实现分组,好处是不影响QRadioButton在界面上的显示(组合框分组方式会在界面上出现组合框,要以自己的需要选择),以及方便ID的设置。
首先添加头文件:
#include <QButtonGroup>声明QButtonGroup变量
QButtonGroup *btnGroupFruits; QButtonGroup *btnGroupVegetables;在窗体构造函数中初始化QButtonGroup,以及把相应的QRadioButton添加进来并设置ID
btnGroupFruits = new QButtonGroup(this); btnGroupFruits->addButton(ui->radioButton11, 0); btnGroupFruits->addButton(ui->radioButton12, 1); btnGroupFruits->addButton(ui->radioButton13, 2); ui->radioButton11->setChecked(true); btnGroupVegetables = new QButtonGroup(this); btnGroupVegetables->addButton(ui->radioButton21, 0); btnGroupVegetables->addButton(ui->radioButton22, 1); btnGroupVegetables->addButton(ui->radioButton23, 2); ui->radioButton21->setChecked(true);三、多个QRadioButton控件响应同一个槽函数
在头文件声明槽函数:
public slots: void onRadioClickFruits(); void onRadioClickVegetables();在窗体构造函数中绑定信号与槽:
connect(ui->radioButton11, SIGNAL(clicked()), this, SLOT(onRadioClickFruits())); connect(ui->radioButton12, SIGNAL(clicked()), this, SLOT(onRadioClickFruits())); connect(ui->radioButton13, SIGNAL(clicked()), this, SLOT(onRadioClickFruits())); connect(ui->radioButton21, SIGNAL(clicked()), this, SLOT(onRadioClickVegetables())); connect(ui->radioButton22, SIGNAL(clicked()), this, SLOT(onRadioClickVegetables())); connect(ui->radioButton23, SIGNAL(clicked()), this, SLOT(onRadioClickVegetables()));槽函数的实现:
QRadioButton的槽函数中,不需要逐个检查QRadioButton控件状态,仅仅通过btnGroupFruits->checkedId()来获知哪一个QRadioButton控件被选中,其返回被选中控件的ID值。
void MainWindow::onRadioClickFruits() { switch(btnGroupFruits->checkedId()) { case 0: qDebug() << QString::fromLocal8Bit("苹果"); break; case 1: qDebug() << QString::fromLocal8Bit("西红柿"); break; case 2: qDebug() << QString::fromLocal8Bit("芒果"); break; } } void MainWindow::onRadioClickVegetables() { switch(btnGroupVegetables->checkedId()) { case 0: qDebug() << QString::fromLocal8Bit("土豆"); break; case 1: qDebug() << QString::fromLocal8Bit("青椒"); break; case 2: qDebug() << QString::fromLocal8Bit("菠菜"); break; } }以下是程序运行结果:
标签:qt5 qradiobutton
原文地址:http://blog.csdn.net/cxp2205455256/article/details/44956051