Qt数字软键盘

使用QSignalMapper类实现一个数字软键盘

基本使用如下：

QSignalMapper *m = QSignalMapper(this);
QPushButton *b;
b=new QPushButton("1");
connect(b, SIGNAL(clicked()),m, SLOT(map()));
m->setMapping(b, 1);
...
connect(m, SIGNAL(mapped(int)), this, SLOT(keyPressed(int)));

示例程序：

SoftKeyboardDlg::SoftKeyboardDlg(QWidget *parent) :
    QDialog(parent),
    ui(new Ui::SoftKeyboardDlg)
{
    ui->setupUi(this);

    SetWindowBackColour(this);
    m = new QSignalMapper(this);

    connect(ui->buttonZero,SIGNAL(clicked()),m,SLOT(map()));
    connect(ui->buttonOne,SIGNAL(clicked()),m,SLOT(map()));
    connect(ui->buttonTwo,SIGNAL(clicked()),m,SLOT(map()));
    connect(ui->buttonThree,SIGNAL(clicked()),m,SLOT(map()));
    connect(ui->buttonFour,SIGNAL(clicked()),m,SLOT(map()));
    connect(ui->buttonFive,SIGNAL(clicked()),m,SLOT(map()));
    connect(ui->buttonSix,SIGNAL(clicked()),m,SLOT(map()));
    connect(ui->buttonEight,SIGNAL(clicked()),m,SLOT(map()));
    connect(ui->buttonSeven,SIGNAL(clicked()),m,SLOT(map()));
    connect(ui->buttonNine,SIGNAL(clicked()),m,SLOT(map()));
    connect(ui->pushButtonX,SIGNAL(clicked()),m,SLOT(map()));
    connect(ui->pushButtonDel,SIGNAL(clicked()),m,SLOT(map()));

    m->setMapping(ui->buttonZero,0);
    m->setMapping(ui->buttonOne,1);
    m->setMapping(ui->buttonTwo,2);
    m->setMapping(ui->buttonThree,3);
    m->setMapping(ui->buttonFour,4);
    m->setMapping(ui->buttonFive,5);
    m->setMapping(ui->buttonSix,6);
    m->setMapping(ui->buttonSeven,7);
    m->setMapping(ui->buttonEight,8);
    m->setMapping(ui->buttonNine,9);
    m->setMapping(ui->pushButtonX,10);
    m->setMapping(ui->pushButtonDel,-1);

    connect(m,SIGNAL(mapped(int)),this,SLOT(keyPress(int)));
    ui->buttonOne->setFocus();
    setStyleSheet(BTN_FOCUS_BACK_COLOR);
}

SoftKeyboardDlg::~SoftKeyboardDlg()
{
    delete ui;
}

void SoftKeyboardDlg::keyPress(int i)
{
    emit keyNum(i);
}