# 数字软键盘

## qmake作为pri使用

- 将文件夹复制到主工程Libs目录下
- 主工程pro文件中加入：

```qmake
include($$PWD/Libs/SoftNumKeyBoard/NumKeyBoard.pri)
```

- 主工程中重写eventFilter函数，实现点击lineedit时，调出小键盘

```cpp
protected:
    virtual bool eventFilter(QObject * obj, QEvent *event) override;
```

```cpp
bool SettingWidget::eventFilter(QObject *obj, QEvent * event)
{
    auto _obj = static_cast<QLineEdit *>(obj);
    if(m_inputList.contains(_obj))
    {
        if(event->type() == QEvent::FocusIn)
        {
            if(!_keyBoard)
            {
                _keyBoard = new NumKeyDia(this);
            }
            //传入对应的QLineEdit
            _keyBoard->setPLineEdit(_obj);
            _keyBoard->exec();
            //QLineEdit取消聚焦，可以不用
            _obj->clearFocus();
            return true;
        }
    }
    return QObject::eventFilter(obj, event);
}
```

- 对应的控件安装事件过滤器

```cpp
    m_inputList = this->findChildren<QLineEdit *>();
    foreach (auto &i, m_inputList)
    {
        i->installEventFilter(this);
        i->setFocusPolicy(Qt::ClickFocus);
    }
```

- 控件设置属性

```cpp
    //设置输入输出的最大值、最小值、名字和是否是数字
    ui->lineEdit_energyA->setProperty("IsNum", true);
	//double时，默认保留三位小数
    ui->lineEdit_energyA->setProperty("IsDouble", true);
    //输入的数不能超过最大值和最小值
	 ui->lineEdit_energyA->setProperty("Max", 1.000);
    ui->lineEdit_energyA->setProperty("Min", 0.000);
    ui->lineEdit_energyA->setProperty("Name", tr("PressureA"));
```