qt实现扫雷三：对话框设计

对话框实现扫雷雷区大小和雷数的设置

问题总结

1、提供给上层对象接口，设置三个参数或获取三个参数
2、继承自QDialog类
3、定义槽函数时，需要有宏，类继承自QObject时需要有这个宏定义

Q_OBJECT

4、以下语句可以设置LineEdit的输入范围，限制输入整数类型需要引入头文件

   #include <QIntValidator>
   column_edit->setValidator(new QIntValidator(0, COLUMN, this));

5、使用调试打印命令

#include <QDebug>
qdebug()<<\" \"; 

6、使用消息对话框

#include <QMessageBox>
QMessageBox::information(NULL, \"hello\", \"illegal input\",
                                         QMessageBox::Ok, QMessageBox::Ok);

7、程序运行效果如下：

头文件

1，定义设置雷区参数对话框类

class thunder_dialog : public QDialog
{
    Q_OBJECT

public:
    thunder_dialog(int x = 9, int y = 9, int num = 10, QWidget *parent = 0);

    //获取行数
    int getRow();
    //获取列数
    int getColumn();
    //获取雷数
    int getNumber();
    //设置行数，列数，雷数参数
    void setParameters(int x, int y, int num);
private slots:
    //确定按钮点击后响应事件的槽函数
    void confirmButtonClicked();

private:
    QPushButton *confirm;
    QPushButton *concel;
    QLabel *row_label;
    QLabel *column_label;
    QLabel *number_label;
    QLineEdit *row_edit;
    QLineEdit *column_edit;
    QLineEdit *number_edit;

private:
    int row;
    int column;
    int number;
};

源文件

thunder_dialog::thunder_dialog(int x, int y, int num, QWidget *parent)
    :row(x), column(y), number(num), QDialog(parent)
{
    setFixedSize(200, 150);
    confirm = new QPushButton(this);
    confirm->setGeometry(50, 120, 50, 20);
    confirm->setText(\"confirm\");
    connect(confirm, SIGNAL(clicked()), this, SLOT(confirmButtonClicked()));

    concel = new QPushButton(this);
    concel->setGeometry(100,120,50,20);
    concel->setText(\"cancel\");
    connect(concel, SIGNAL(clicked()), this, SLOT(close()));

    row_label = new QLabel(this);
    row_label->setText(\"行数:\");
    row_label->setGeometry(50,30,50,20);

    column_label = new QLabel(this);
    column_label->setText(\"列数:\");
    column_label->setGeometry(50,60,50,20);

    number_label = new QLabel(this);
    number_label->setText(\"雷数:\");
    number_label->setGeometry(50,90,50,20);

    row_edit = new QLineEdit(this);
    row_edit->setGeometry(100,30,50,20);
    row_edit->setText(QString::number(row));
    row_edit->setValidator(new QIntValidator(0, ROW, this));

    column_edit = new QLineEdit(this);
    column_edit->setGeometry(100,60,50,20);
    column_edit->setText(QString::number(column));
    column_edit->setValidator(new QIntValidator(0, COLUMN, this));

    number_edit = new QLineEdit(this);
    number_edit->setGeometry(100,90,50,20);
    number_edit->setText(QString::number(number));
    number_edit->setValidator(new QIntValidator(0, ROW * COLUMN, this));
}

int thunder_dialog::getRow()
{
    return row;
}

int thunder_dialog::getColumn()
{
    return column;
}

int thunder_dialog::getNumber()
{
    return number;
}

void thunder_dialog::setParameters(int x, int y, int num)
{
    row = x;
    column = y;
    number = num;
}

void thunder_dialog::confirmButtonClicked()
{
    int x = row_edit->text().toInt();
    int y = column_edit->text().toInt();
    int z = number_edit->text().toInt();

    if(x <= 0 || x >= ROW || y <= 0 || y >= COLUMN || z < 0 || z > x * y)
    {
        QMessageBox::StandardButton rb = QMessageBox::information(NULL, \"hello\", \"illegal input\",
                                     QMessageBox::Ok, QMessageBox::Ok);
        if(rb == QMessageBox::Ok)
        {
            return;
        }else
        {

        }
        return;
    }
    qDebug()<<x<<\" \"<<y<<\" \"<<z;
    row = x;
    column = y;
    number = z;
    close();
}