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YuuXii
Dialog
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803b2112
Commit
803b2112
authored
Jan 25, 2021
by
YuuXii
1
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Merge branch '主人2' into 'master'
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1.dialog.h
1.dialog.h
#ifndef DIALOG_H
#define DIALOG_H
#include <QDialog>
#include <QLineEdit>
#include <QPushButton>
#include <QLabel>
class Dialog : public QDialog
{
Q_OBJECT
public:
Dialog(QWidget *parent = 0);
~Dialog();
private:
QLabel *label1 ,*label2 ;
QLineEdit *lineEdit;
QPushButton *button;
private slots:
void showArea();
};
#endif // DIALOG_H
2.dialog.cpp
#include "dialog.h"
#include <QGridLayout>
const static double PI =3.1416;
Dialog::Dialog(QWidget *parent)
: QDialog(parent)
{
label1=new QLabel(this);
label1->setText(tr("请输入圆的半径:"));
lineEdit=new QLineEdit(this);
label2=new QLabel(this);
button=new QPushButton(this);
button->setText(tr("显示对应圆的面积: "));
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);
connect(button,SIGNAL(clicked()),this,SLOT(showArea()));
}
Dialog::~Dialog()
{
}
void Dialog::showArea()
{
bool ok;
QString tempStr;
QString valueStr=lineEdit->text();
int valueInt=valueStr.toInt(&ok);
double area=valueInt*valueInt*PI;
label2->setText(tempStr.setNum(area));
}
YuuXii
@YuuXii
mentioned in commit
16a4791b
Jan 25, 2021
mentioned in commit
16a4791b
mentioned in commit 16a4791be7ad9687eb0b203d107bd8ce20bcdc11
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