实例介绍
【实例简介】Qt5.8制作的简单数字计算器
【实例截图】
#include "ui_mainwindow.h"
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
/***********开机显示*************/
// widget = new QWidget(this);
// widget->setFixedSize(222,418);
// timerOpen = new QTimer;
// labelOpen = new QLabel(widget);
// QImage *img = new QImage; //新建一个image对象
// img->load(":/Photo/开机界面.png"); //将图像资源载入对象img，注意路径，可点进图片右键复制路径
// this->labelOpen->setPixmap(QPixmap::fromImage(*img)); //将图片放入label，使用setPixmap,注意指针*img
// timerOpen->start(3000);
// connect(timerOpen,SIGNAL(timeout()),this,SLOT(OpenPhoto_Slot()));
/******************************/
this->setWindowTitle("计算器");
this->setFixedSize(222,418);
this->setWindowIcon(QIcon(":/Photo/ICON.png"));
QPalette color;
color.setColor(QPalette::Background,Qt::darkCyan);//设置背景颜色
this->setPalette(color);
this->setPushButtonSize();
this->addControlUi();
this->setMenuIcon();
ui->lcdNumber->setDigitCount(10);
}
//void MainWindow::OpenPhoto_Slot()
//{
// qDebug()<<"this OPenPhoto_Slot";
// delete widget;
// timerOpen->stop();
//}
void MainWindow::setMenuIcon()
{
ui->actioncheng->setIcon(QIcon(":/Photo/标准.png"));
ui->actionscience->setIcon(QIcon(":/Photo/科学.png"));
ui->actionprogrammer->setIcon(QIcon(":/Photo/程序员.png"));
}
void MainWindow::setPushButtonSize()
{
ui->PER_CENT->setFixedSize(51,51);// %
ui->ZERO->setFixedSize(51,51); // 0
ui->POINT->setFixedSize(51,51); // .
ui->ONE->setFixedSize(51,51); // 1
ui->TWO->setFixedSize(51,51); // 2
ui->THREE->setFixedSize(51,51); // 3
ui->FOUR->setFixedSize(51,51); // 4
ui->FIVE->setFixedSize(51,51); // 5
ui->SIX->setFixedSize(51,51); // 6
ui->SEVEN->setFixedSize(51,51); // 7
ui->EIGHT->setFixedSize(51,51); // 8
ui->NINE->setFixedSize(51,51); // 9
ui->CLEAR->setFixedSize(51,51); // C
ui->DIVIDE->setFixedSize(51,51); //"/"
ui->RIDE->setFixedSize(51,51); // X
ui->SUB->setFixedSize(51,51); // -
ui->ADD->setFixedSize(51,51); //
ui->EQUAL->setFixedSize(51,101); // =
ui->BACK->setFixedSize(51,51);
ui->lcdNumber->setFixedSize(201,61);
}
void MainWindow::addControlUi()
{
ui->ZERO-> setIcon(QIcon(":/Photo/0.png"));
ui->ONE-> setIcon(QIcon(":/Photo/1.png"));
ui->TWO-> setIcon(QIcon(":/Photo/2.png"));
ui->THREE-> setIcon(QIcon(":/Photo/3.png"));
ui->FOUR-> setIcon(QIcon(":/Photo/4.png"));
ui->FIVE-> setIcon(QIcon(":/Photo/5.png"));
ui->SIX-> setIcon(QIcon(":/Photo/6.png"));
ui->SEVEN-> setIcon(QIcon(":/Photo/7.png"));
ui->EIGHT-> setIcon(QIcon(":/Photo/8.png"));
ui->NINE-> setIcon(QIcon(":/Photo/9.png"));
ui->BACK-> setIcon(QIcon(":/Photo/back.png"));
ui->ADD-> setIcon(QIcon(":/Photo/ .png"));
ui->SUB-> setIcon(QIcon(":/Photo/-.png"));
ui->CLEAR-> setIcon(QIcon(":/Photo/C.png"));
ui->DIVIDE->setIcon(QIcon(":/Photo/X.png"));
ui->RIDE-> setIcon(QIcon(":/Photo/除.png"));
ui->PER_CENT->setIcon(QIcon(":/Photo/%.png"));
ui->POINT-> setIcon(QIcon(":/Photo/..png"));
ui->EQUAL-> setIcon(QIcon(":/Photo/=.png"));
ui->ZERO-> setIconSize(QSize(51,51));
ui->ONE-> setIconSize(QSize(51,51));
ui->TWO-> setIconSize(QSize(51,51));
ui->THREE-> setIconSize(QSize(51,51));
ui->FOUR-> setIconSize(QSize(51,51));
ui->FIVE-> setIconSize(QSize(51,51));
ui->SIX-> setIconSize(QSize(51,51));
ui->SEVEN-> setIconSize(QSize(51,51));
ui->EIGHT-> setIconSize(QSize(51,51));
ui->NINE-> setIconSize(QSize(51,51));
ui->BACK-> setIconSize(QSize(51,51));
ui->ADD-> setIconSize(QSize(51,51));
ui->SUB-> setIconSize(QSize(51,51));
ui->CLEAR-> setIconSize(QSize(51,51));
ui->DIVIDE->setIconSize(QSize(51,51));
ui->RIDE-> setIconSize(QSize(51,51));
ui->PER_CENT->setIconSize(QSize(51,51));
ui->POINT-> setIconSize(QSize(51,51));
ui->EQUAL-> setIconSize(QSize(51,101));
}
MainWindow::~MainWindow()
{
delete ui;
}
/**********- 0 -***********/
void MainWindow::on_ZERO_pressed()
{
ui->ZERO-> setIcon(QIcon(":/Photo/0白.png"));
ui->ZERO-> setIconSize(QSize(51,51));
if(line.isEmpty())
{
line = "0";
ui->lcdNumber->display("0");
}
else
{
line = "0";
ui->lcdNumber->display(line);
}
}
void MainWindow::on_ZERO_released()
{
ui->ZERO-> setIcon(QIcon(":/Photo/0.png"));
ui->ZERO-> setIconSize(QSize(51,51));
}
/**********- 1 -***********/
void MainWindow::on_ONE_pressed()
{
ui->ONE-> setIcon(QIcon(":/Photo/1白.png"));
ui->ONE-> setIconSize(QSize(51,51));
line = "1";
ui->lcdNumber->display(line);
}
void MainWindow::on_ONE_released()
{
ui->ONE-> setIcon(QIcon(":/Photo/1.png"));
ui->ONE-> setIconSize(QSize(51,51));
}
/**********- 2 -***********/
void MainWindow::on_TWO_pressed()
{
ui->TWO-> setIcon(QIcon(":/Photo/2白.png"));
ui->TWO-> setIconSize(QSize(51,51));
line = "2";
ui->lcdNumber->display(line);
}
void MainWindow::on_TWO_released()
{
ui->TWO-> setIcon(QIcon(":/Photo/2.png"));
ui->TWO-> setIconSize(QSize(51,51));
}
/**********- 3 -***********/
void MainWindow::on_THREE_pressed()
{
ui->THREE-> setIcon(QIcon(":/Photo/3白.png"));
ui->THREE-> setIconSize(QSize(51,51));
line = "3";
ui->lcdNumber->display(line);
}
void MainWindow::on_THREE_released()
{
ui->THREE-> setIcon(QIcon(":/Photo/3.png"));
ui->THREE-> setIconSize(QSize(51,51));
}
/**********- 4 -***********/
void MainWindow::on_FOUR_pressed()
{
ui->FOUR-> setIcon(QIcon(":/Photo/4白.png"));
ui->FOUR-> setIconSize(QSize(51,51));
line = "4";
ui->lcdNumber->display(line);
}
void MainWindow::on_FOUR_released()
{
ui->FOUR-> setIcon(QIcon(":/Photo/4.png"));
ui->FOUR-> setIconSize(QSize(51,51));
}
/**********- 5 -***********/
void MainWindow::on_FIVE_pressed()
{
ui->FIVE-> setIcon(QIcon(":/Photo/5白.png"));
ui->FIVE-> setIconSize(QSize(51,51));
line = "5";
ui->lcdNumber->display(line);
}
void MainWindow::on_FIVE_released()
{
ui->FIVE-> setIcon(QIcon(":/Photo/5.png"));
ui->FIVE-> setIconSize(QSize(51,51));
}
/**********- 6 -***********/
void MainWindow::on_SIX_pressed()
{
ui->SIX-> setIcon(QIcon(":/Photo/6白.png"));
ui->SIX-> setIconSize(QSize(51,51));
line = "6";
ui->lcdNumber->display(line);
}
void MainWindow::on_SIX_released()
{
ui->SIX-> setIcon(QIcon(":/Photo/6.png"));
ui->SIX-> setIconSize(QSize(51,51));
}
/**********- 7 -***********/
void MainWindow::on_SEVEN_pressed()
{
ui->SEVEN-> setIcon(QIcon(":/Photo/7白.png"));
ui->SEVEN-> setIconSize(QSize(51,51));
line = "7";
ui->lcdNumber->display(line);
}
void MainWindow::on_SEVEN_released()
{
ui->SEVEN-> setIcon(QIcon(":/Photo/7.png"));
ui->SEVEN-> setIconSize(QSize(51,51));
}
/**********- 8 -***********/
void MainWindow::on_EIGHT_pressed()
{
ui->EIGHT-> setIcon(QIcon(":/Photo/8白.png"));
ui->EIGHT-> setIconSize(QSize(51,51));
line = "8";
ui->lcdNumber->display(line);
}
void MainWindow::on_EIGHT_released()
{
ui->EIGHT-> setIcon(QIcon(":/Photo/8.png"));
ui->EIGHT-> setIconSize(QSize(51,51));
}
/**********- 9 -***********/
void MainWindow::on_NINE_pressed()
{
ui->NINE-> setIcon(QIcon(":/Photo/9白.png"));
ui->NINE-> setIconSize(QSize(51,51));
line = "9";
ui->lcdNumber->display(line);
}
void MainWindow::on_NINE_released()
{
ui->NINE-> setIcon(QIcon(":/Photo/9.png"));
ui->NINE-> setIconSize(QSize(51,51));
}
/**********- back -***********/
void MainWindow::on_BACK_pressed()
{
ui->BACK-> setIcon(QIcon(":/Photo/back白.png"));
ui->BACK-> setIconSize(QSize(51,51));
qDebug()<<line;
line.chop(1); //倒位删除，即是从字符串后面开始按位删除
if(line.isEmpty())
{
ui->lcdNumber->display(0);
}
else
{
ui->lcdNumber->display(line);
}
}
void MainWindow::on_BACK_released()
{
ui->BACK-> setIcon(QIcon(":/Photo/back.png"));
ui->BACK-> setIconSize(QSize(51,51));
}
/**********- -***********/
void MainWindow::on_ADD_pressed()
{
ui->ADD-> setIcon(QIcon(":/Photo/ 白.png"));
ui->ADD-> setIconSize(QSize(51,51));
pointFlag = true;
flag = 1;
temp1 = line; //获取前面输入的字符，并临时保存起来
qDebug()<<temp1;
line.clear(); //清空字符数组
sum = temp1.toDouble(); //将字符转换成浮点型
qDebug()<<sum;
ui->lcdNumber->display(0);//显示清空状态
}
void MainWindow::on_ADD_released()
{
ui->ADD-> setIcon(QIcon(":/Photo/ .png"));
ui->ADD-> setIconSize(QSize(51,51));
}
/**********- - -***********/
void MainWindow::on_SUB_pressed()
{
ui->SUB-> setIcon(QIcon(":/Photo/-白.png"));
ui->SUB-> setIconSize(QSize(51,51));
temp1 = line; //获取前面输入的字符，并临时保存起来
pointFlag = true;
qDebug()<<temp1;
line.clear(); //清空字符数组
if(flag3 == 0)
{
sum -= (temp1.toDouble()) * -1; //将字符转换成浮点型
}
else
{
sum -= temp1.toDouble(); //将字符转换成浮点型
}
qDebug()<<sum;
flag3 = 1;
ui->lcdNumber->display(0);//显示清空状态
}
void MainWindow::on_SUB_released()
{
ui->SUB-> setIcon(QIcon(":/Photo/-.png"));
ui->SUB-> setIconSize(QSize(51,51));
}
/**********- C -***********/
void MainWindow::on_CLEAR_pressed()
{
ui->CLEAR-> setIcon(QIcon(":/Photo/C白.png"));
ui->CLEAR-> setIconSize(QSize(51,51));
line.clear();
temp1.clear();
temp2.clear();
sum = 0;
sum1 = 1;
flag = 0;
flag1 = 0;
flag3 = 0;
flag4 =0;
flag5 = 0;
pointFlag = true;
rideFlag = true;
ui->lcdNumber->display("0");
}
void MainWindow::on_CLEAR_released()
{
ui->CLEAR-> setIcon(QIcon(":/Photo/C.png"));
ui->CLEAR-> setIconSize(QSize(51,51));
}
/**********- X -***********/
void MainWindow::on_DIVIDE_pressed()
{
ui->DIVIDE->setIcon(QIcon(":/Photo/X白.png"));
ui->DIVIDE->setIconSize(QSize(51,51));
pointFlag = true;
flag5 = 1;
temp1 = line; //获取前面输入的字符，并临时保存起来
qDebug()<<temp1;
line.clear(); //清空字符数组
if(sum == 0)
{
sum = temp1.toDouble();
}
else
{
sum = sum * temp1.toDouble();
}
ui->lcdNumber->display(0);//显示清空状态
}
void MainWindow::on_DIVIDE_released()
{
ui->DIVIDE->setIcon(QIcon(":/Photo/X.png"));
ui->DIVIDE->setIconSize(QSize(51,51));
}
/**********- / -***********/
void MainWindow::on_RIDE_pressed()
{
ui->RIDE-> setIcon(QIcon(":/Photo/除白.png"));
ui->RIDE-> setIconSize(QSize(51,51));
pointFlag = true;
flag4 = 1;
temp1 = line; //获取前面输入的字符，并临时保存起来
qDebug()<<"ride:"<<temp1;
line.clear(); //清空字符数组
if(rideFlag == true)
{
rideFlag = false;
sum1 = temp1.toDouble();
}
else
{
sum1 = sum1 / temp1.toDouble();
}
qDebug()<<"ridesum1:"<<sum1;
ui->lcdNumber->display(0);//显示清空状态
}
void MainWindow::on_RIDE_released()
{
ui->RIDE-> setIcon(QIcon(":/Photo/除.png"));
ui->RIDE-> setIconSize(QSize(51,51));
}
/**********- % -***********/
void MainWindow::on_PER_CENT_pressed()
{
ui->PER_CENT->setIcon(QIcon(":/Photo/%白.png"));
ui->PER_CENT->setIconSize(QSize(51,51));
pointFlag = true;
}
void MainWindow::on_PER_CENT_released()
{
ui->PER_CENT->setIcon(QIcon(":/Photo/%.png"));
ui->PER_CENT->setIconSize(QSize(51,51));
}
/**********- 。 -***********/
void MainWindow::on_POINT_pressed()
{
ui->POINT-> setIcon(QIcon(":/Photo/.白.png"));
ui->POINT-> setIconSize(QSize(51,51));
if(pointFlag == true) //没有按等于号按键，说明没有进行运算，所以显示第一次输入的字符串
{
pointFlag = false;
line =".";
ui->lcdNumber->display(line);
}
}
void MainWindow::on_POINT_released()
{
ui->POINT-> setIcon(QIcon(":/Photo/..png"));
ui->POINT-> setIconSize(QSize(51,51));
}
/**********- = -***********/
void MainWindow::on_EQUAL_pressed()
{
ui->EQUAL-> setIcon(QIcon(":/Photo/=白.png"));
ui->EQUAL-> setIconSize(QSize(51,101));
flag1 = 1; //按一次等于号就改变状态
if(flag == 1) //加法
{
temp2 =line;
line.clear(); //清空字符串
sum = sum temp2.toDouble(); //将字符转换成浮点型
ui->lcdNumber->display(QString::number(sum)); //将浮点型转换成字符
flag = 0; //重新让标志位置零，等待下一次的加法进行
}
else if(flag3 == 1) //减法
{
temp2 = line;
line.clear(); //清空字符串
sum =sum - temp2.toDouble(); //将字符转换成浮点型
ui->lcdNumber->display(line);
if(sum == 0) //等于0
{
ui->lcdNumber->display("0");
}
ui->lcdNumber->display(QString::number(sum)); //将浮点型转换成字符
// qDebug()<<sum;
flag3 = 0; //重新让标志位置零，等待下一次的减法进行
}
else if(flag4 == 1) //除法
{
temp2 = line;
line.clear(); //清空字符串
rideFlag = true;
qDebug()<<"temp2:"<<temp2;
qDebug()<<"sum1:"<<sum1;
sum1 = sum1 / temp2.toDouble(); //将字符转换成浮点型
if(temp2 == "0") //分母等于0
{
ui->lcdNumber->display("0");
}
qDebug()<<"sum11"<<sum1;
ui->lcdNumber->display(QString::number(sum1)); //将浮点型转换成字符
flag4 = 0; //重新让标志位置零,等待下一次的除法进行
}
else if(flag5 == 1) //乘法
{
temp2 = line;
line.clear(); //清空字符串
sum = sum * temp2.toDouble(); //将字符转换成浮点型
ui->lcdNumber->display(QString::number(sum)); //将浮点型转换成字符
flag5 = 0; //重新让标志位置零，等待下一次的乘法进行
}
}
void MainWindow::on_EQUAL_released()
{
ui->EQUAL-> setIcon(QIcon(":/Photo/=.png"));
ui->EQUAL-> setIconSize(QSize(51,101));
}
void MainWindow::on_actionscience_triggered()
{
this->hide();
S.show();
}
void MainWindow::on_actionprogrammer_triggered()
{
this->hide();
P.show();
}
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