原创 QT做的小程序

 2011-1-21 09:52  5936 6 7 分类: MCU/ 嵌入式

QT做的小程序，挺好玩的，记录下过程：

先在QTcreator里面建个工程，QT GUI project。
建好之后，按我上一篇的设置里面稍作更改（参考hi.baidu.com/%C9%B3%BC%D3%BB%C6%BD%F0%CA%A5%B6%B7%CA%BF/blog/item/e7bb8dfaefeb9f12a8d3119f.html），要不总是提示崩溃的。

工程包含main.cpp   ,temperdialog.cpp， temperdialog.h,temperdialog.ui四个文件。
下面一一贴上分别的文件里的代码：
temperdialog.h：
#ifndef TEMPERDIALOG_H
#define TEMPERDIALOG_H

#include <QDialog>
#include "ui_temperdialog.h"
namespace Ui {
class temperDialog;
}

class temperDialog : public QDialog,public Ui::temperDialog
{
Q_OBJECT
public:
temperDialog(QWidget *parent = 0);
//~temperDialog();

protected:
void changeEvent(QEvent *e);

private:
Ui::temperDialog *ui;

void initSettings();
void readSettings();
int currentsheshiwendu;
int currenthuashiwendu;

private slots:
void huashiwendu();
void sheshiwendu();
void saveSettings();
};

#endif // TEMPERDIALOG_H

temperdialog.cpp代码如下：
#include "temperdialog.h"
#include "ui_temperdialog.h"
#include <QSettings>
#include <QCoreApplication>
#include <QApplication>

/*temperDialog::temperDialog(QWidget *parent) :
QDialog(parent),
ui(new Ui::temperDialog)
{
ui->setupUi(this);
}

temperDialog::~temperDialog()
{
delete ui;
}*/

void temperDialog::changeEvent(QEvent *e)
{
QDialog::changeEvent(e);
switch (e->type()) {
case QEvent::LanguageChange:
ui->retranslateUi(this);
break;
default:
break;
}
}

void temperDialog::initSettings()
{

Sliderhuashi->setValue(currenthuashiwendu);
dialsheshi->setValue(currentsheshiwendu);
}

void temperDialog::saveSettings()
{
currenthuashiwendu=Sliderhuashi->value();
currentsheshiwendu=dialsheshi->value();
QSettings settings;
settings.setValue("Temperature/CelNumber",currentsheshiwendu);
settings.setValue("Temperature/FahNumber",currenthuashiwendu);
}

void temperDialog::readSettings()
{   //下面的两句不可以设置删除，靠这两句存储设置，这里的设置可以让下次打开//软件后，保存上次设置的温度值
QCoreApplication::setOrganizationName("Mysoft");
QCoreApplication::setApplicationName("temperfile");
QSettings settings;
// settings.setPath(QSettings::NativeFormat,QSettings::UserScope,"/home/yanwei/qt/temperature/");

currentsheshiwendu=settings.value("Temperature/CelNumber",0).toInt();
currenthuashiwendu=settings.value("Temperature/FahNumber",32).toInt();

}

void temperDialog::huashiwendu()
{
Sliderhuashi->setValue(dialsheshi->value()*9/5+32);

}

void temperDialog::sheshiwendu()
{
dialsheshi->setValue((Sliderhuashi->value()-32)*5/9);
}

temperDialog::temperDialog(QWidget *parent) :
QDialog(parent)

{
setupUi(this);

readSettings();
initSettings();
}

main.cpp代码如下：
#include <QtGui/QApplication>
#include "temperdialog.h"

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

最后运行界面如下：

/************************************************************************
以下是时钟程序，可以定时。最小化到系统托盘
/************************************************************************
程序包含4个文件，ClcokWidget.ui,ClcokWidget.cpp, ClcokWidget.h和main.cpp。
下面一一贴上以上文件的代码
main.cpp：
#include <QtGui/QApplication>
#include "clockwidget.h"

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

ClcokWidget.cpp代码如下：
#include "clockwidget.h"
#include "ui_clockwidget.h"
#include <QtGui>
/*clockWidget::clockWidget(QWidget *parent) :
QWidget(parent),
ui(new Ui::clockWidget)
{
ui->setupUi(this);
}

clockWidget::~clockWidget()
{
delete ui;
}*/

void clockWidget::changeEvent(QEvent *e)
{
QWidget::changeEvent(e);
switch (e->type()) {
case QEvent::LanguageChange:
ui->retranslateUi(this);
break;
default:
break;
}
}
void clockWidget::changetext()
{
labeltip->setText("TIME OUT!!!");
labeltip->show();
}

void clockWidget::init()
{
labeltip->hide();
timer=new QTimer;        //控制lcd的时间刷新
lcdNumber->display(QTime::currentTime().toString("hh:mm:ss"));
itimer=new QTimer;
/*以下红色部分代码为最小化到系统托盘的程序*/
trayIcon=new QSystemTrayIcon;
trayIcon->setIcon(QIcon("./20101.ico"));
trayIcon->show();
restoreAct=new QAction(QString::fromLocal8Bit("显示"),this);
quitAct=new QAction(QString::fromLocal8Bit("退出"),this);
trayIconMenu=new QMenu;
trayIconMenu->addAction(restoreAct);
trayIconMenu->addAction(quitAct);
trayIcon->setContextMenu(trayIconMenu);
}

void clockWidget::con()
{
connect(timer,SIGNAL(timeout()),this,SLOT(showtime()));
timer->start(1000);
connect(itimer,SIGNAL(timeout()),this,SLOT(comToCur()));
itimer->start(20);
connect(restoreAct,SIGNAL(triggered(bool)),this,SLOT(show()));
connect (quitAct,SIGNAL(triggered(bool)),this,SLOT(close()));
}
void clockWidget::showtime()
{
lcdNumber->display(QTime::currentTime().toString("hh:mm:ss"));

}
void clockWidget::mini()
{
hide();
}

void clockWidget::comToCur()
{
if( QVariant(QTime::currentTime()).toString() == QVariant(timeEdit->time()).toString() )
{
//QApplication::beep();
emit isCurrentTime();
}

}

//void closeEvent(QCloseEvent * event);
void clockWidget::closeEvent(QCloseEvent *event)
{
QMessageBox::information(0,"Quit","Are you sure to exit the Clock?");
}

clockWidget::clockWidget(QWidget *parent) :
QWidget(parent)
{
setupUi(this);
init();
con();
}
ClockWidget.h代码如下：
#ifndef CLOCKWIDGET_H
#define CLOCKWIDGET_H
#include "ui_clockwidget.h"
#include <QWidget>
#include <QSystemTrayIcon>
class QTimer;
class QTime;
class QVariant;
class QAction;
class QMenu;
namespace Ui {
class clockWidget;
}

class clockWidget : public QWidget ,public Ui::clockWidget
{
Q_OBJECT
signals:
void isCurrentTime();
public:
clockWidget(QWidget *parent = 0);
// ~clockWidget();

protected:
void changeEvent(QEvent *e);
void closeEvent(QCloseEvent *event);
private:
Ui::clockWidget *ui;
void init();
void con();
QTimer * timer;
QTimer *itimer;
QAction *restoreAct;
QAction *quitAct;
QMenu *trayIconMenu;
QSystemTrayIcon *trayIcon;

private slots:
void showtime();
void mini();                             //最小化到托盘
void comToCur();                  //比较所设置时间跟当前时间
void changetext();

};

#endif // CLOCKWIDGET_H

关键部分，应该是可以系统最小化托盘的那部分红色代码。