qt编程问题,请高手指教

发布网友发布时间：2023-07-18 05:13

共1个回答

热心网友时间：2024-11-26 14:09

Dialog::Dialog(QWidget *parent)

: QDialog(parent)

{

label1=new QLabel(this);

label1->setText(tr("<i>请输入圆的半径：</i>"));

lineEdit=new QLineEdit(this);

label2=new QLabel(this);

QPalette palette;

palette.setColor(QPalette::WindowText,Qt::red);

label2->setPalette(palette);

button=new QPushButton(this);

palette.setColor(QPalette::ButtonText,Qt::red);

button->setPalette(palette);

button->setText(tr("<font color=red>显示对应圆的面积</font>"));

QGridLayout *mainLayout=new QGridLayout(this);

mainLayout->addWidget(label1,0,0);

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

mainLayout->addWidget(label2,1,0);

mainLayout->addWidget(button,1,1);

// setLayout(mainLayout);

connect(button,SIGNAL(clicked()),this,SLOT(showArea()));

connect(lineEdit,SIGNAL(textChanged(QString)),this,SLOT(showArea()));

}