QT新手日记025 - W002程序代码

一、pro文件：W002.pro

QT += core gui

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

CONFIG += c++17

# You can make your code fail to compile if it uses deprecated APIs.
# In order to do so, uncomment the following line.
#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000 # disables all the APIs deprecated before Qt 6.0.0

SOURCES += \\
main.cpp \\
wintwo.cpp

HEADERS += \\
wintwo.h

# Default rules for deployment.
qnx: target.path = /tmp/$${TARGET}/bin
else: unix:!android: target.path = /opt/$${TARGET}/bin
!isEmpty(target.path): INSTALLS += target

RESOURCES +=

二、头文件：wintwo.h

#ifndef WINTWO_H
#define WINTWO_H

#include <QMainWindow>

class WinTwo : public QMainWindow
{
Q_OBJECT

public:
WinTwo(QWidget *parent = nullptr);
~WinTwo();
QString GetTipInformation(int Index,QDate d,QTime t,QString obj);
private:
int nowIndex=0;
};
#endif // WINTWO_H

三、主程序：main.cpp

#include "wintwo.h"

#include <QApplication>

int main(int argc, char *argv[])
{
QApplication a(argc, argv);
WinTwo w;
w.show();
return a.exec();
}

四、核心程序：wintwo.cpp

#include "wintwo.h"
#include<QGroupBox>
#include<QLabel>
#include<QComboBox>
#include<QDateEdit>
#include<QStringList>
#include<QTextEdit>
#include<QPushButton>
#include<QFile>
#include<QDir>
#include<QDebug>
#include<QGuiApplication>
#include<QScreen>

WinTwo::WinTwo(QWidget *parent)
: QMainWindow(parent)
{
setWindowTitle("QT第二个程序 – 每日一题");
setFixedSize(304,504);
QGroupBox *grp = new QGroupBox("每日一题",this);
grp->move(2,2);
grp->resize(300,500);

QLabel *l1 = new QLabel("日期:",grp);
l1->resize(80,30);
l1->move(10,30);

QLabel *l2 = new QLabel("时间:",grp);
l2->resize(80,30);
l2->move(10,60);

QLabel *l3 = new QLabel("主题:",grp);
l3->resize(80,30);
l3->move(10,90);

QDateEdit *cmbdate = new QDateEdit(grp);
cmbdate->resize(120,30);
cmbdate->move(95,30);
cmbdate->setDate(QDate::currentDate());
QTimeEdit *cmbtime = new QTimeEdit(grp);
cmbtime->resize(120,30);
cmbtime->move(95,60);
cmbtime->setTime(QTime::currentTime());
QComboBox *cmbobj = new QComboBox(grp);
cmbobj->resize(120,30);
cmbobj->move(95,90);

cmbobj->addItems({"QWidget","QMainWindow","QDialog"});
cmbobj->setCurrentIndex(0);

QTextEdit *txt = new QTextEdit(grp);
txt->resize(280,500-140);
txt->move(10,130);
txt->setReadOnly(true);
QPushButton *btnup = new QPushButton("上一题",grp);
btnup->resize(65,40);
btnup->move(225,30);
QPushButton *btndw = new QPushButton("下一题",grp);
btndw->resize(65,40);
btndw->move(225,80);
connect(btnup,&QPushButton::clicked,this,[=](){
if(nowIndex<=0)
{
nowIndex=100;
}
else
{
nowIndex–;
}
txt->setText(GetTipInformation(nowIndex,cmbdate->date(),cmbtime->time(),cmbobj->currentText()));

//上一题
});
connect(btndw,&QPushButton::clicked,this,[=](){
if(nowIndex>=100)
{
nowIndex=0;
}
else
{
nowIndex++;
}
txt->setText(GetTipInformation(nowIndex,cmbdate->date(),cmbtime->time(),cmbobj->currentText()));
//上一题
});
txt->setText(GetTipInformation(nowIndex,cmbdate->date(),cmbtime->time(),cmbobj->currentText()));

this->move((QGuiApplication::primaryScreen()->size().width()-this->width())/2,
(QGuiApplication::primaryScreen()->size().height()-this->height())/2);
}

QString WinTwo::GetTipInformation(int Index,QDate d,QTime t,QString obj)
{
QString path=QDir::currentPath()+ "/TipFiles/Tipinfo"+QString::number(Index)+".txt";
QFile file(path);
QString dat="没有发现文件"+path;
if(file.exists())
{
file.open(QIODevice::ReadOnly);
dat=file.readAll();
file.close();
}
QString result=QString("每日一题[%1 %2]=>%3:%4\\n%5").
arg(d.toString("yyyy-MM-dd")).arg(t.toString("hh:mm:ss")).arg(obj).
arg(QString::number(Index)).arg(dat);

return result;
}
WinTwo::~WinTwo()
{
}

五、每日一题内容以Tipinfo[0..n].txt命名的文件放在编译目录下的TipFiles目录下。

完成的界面截图(Deepin系统)