Qt多信号连接槽时间

#include "signals.h"

Signals::Signals(QWidget *parent)

    : QDialog(parent)

{

    resize(200,200);

    QSignalMapper *signal_mapper = new QSignalMapper(this);//创建一个QSignalMapper一对象

    //控件定义

    mainLayout = new QGridLayout(this);

    PushButton1 = new QPushButton(tr("QPushButton1"));

    PushButton2 = new QPushButton(tr("QPushButton2"));

    ToolButton1 = new QToolButton;

    ToolButton2 = new QToolButton;

    ToolButton1->setText(tr("ToolButton1"));

    ToolButton2->setText(tr("ToolButton2"));

    //控件布局

    mainLayout->addWidget(PushButton1,0,0);

    mainLayout->addWidget(PushButton2,1,0);

    mainLayout->addWidget(ToolButton1,2,0);

    mainLayout->addWidget(ToolButton2,3,0);

    setLayout(mainLayout);

     //将需要区分的Button连接到QSignalMapper上的map()

    connect(PushButton1, SIGNAL(clicked(bool)),signal_mapper, SLOT(map()));

    connect(PushButton2, SIGNAL(clicked(bool)),signal_mapper, SLOT(map()));

    connect(ToolButton1, SIGNAL(clicked(bool)),signal_mapper, SLOT(map()));

    connect(ToolButton2, SIGNAL(clicked(bool)),signal_mapper, SLOT(map()));

    //setMapping是个重载函数，为button设置id 或者text 或者widget object
    //这里我们使用为button设定id

    signal_mapper->setMapping(PushButton1,1);

    signal_mapper->setMapping(PushButton2,2);

    signal_mapper->setMapping(ToolButton1,3);

    signal_mapper->setMapping(ToolButton2,4);

    //然后将按钮触发的信号mapped连接到自定义槽然后将id(QString，QObject等类型)传过去进行处理

    connect(signal_mapper,SIGNAL(mapped(int)),this,SLOT(caonimaSlot(int)));

}

Signals::~Signals()

{

}

void Signals::caonimaSlot(int num)

{

  switch(num)

  {

  case 1:

      qDebug()<< PushButton1->text() <<endl;

      break;

  case 2:

      qDebug()<< PushButton2->text() <<endl;

      break;

  case 3:

      qDebug() << ToolButton1->text() <<endl;

      break;

  case 4:

      qDebug() << ToolButton2->text() <<endl;

      break;

  default:

      break;

  }

}