第一期:
用hello world简单的代码更容易看懂托盘的具体实现，一些细节问题，比如为什么提示消息没有显示在托盘上，如何在tip消息上增加图标等。
#include <QtGui>
class myclass: public QWidget
{
public:
myclass();
private:
QPushButton *b1;
QSystemTrayIcon *trayIcon;
};
myclass::myclass()
{
QTextCodec::setCodecForTr(QTextCodec::codecForName("GB2312"));
setMinimumSize(200,100);
setMaximumSize(200,100);
b1=new QPushButton("hello world",this);
b1->setGeometry(20,20,160,40);
QIcon icon = QIcon("./images/bad.svg");
setWindowIcon(icon);
trayIcon = new QSystemTrayIcon(this);
trayIcon->setIcon(icon);
trayIcon->setToolTip("a trayicon example");
QString titlec=tr("Hello");
QString textc=QString::fromLocal8Bit("Hello QT?");
trayIcon->show();
trayIcon->showMessage(titlec,textc,QSystemTrayIcon::Information,5000);
setWindowTitle(tr("Systray"));
}
int main(int argc,char **argv)
{
QApplication testc(argc,argv);
myclass newc;
newc.show();
return testc.exec();
}
第二期:
进一步研究，加入点击托盘的响应，使提示信息显示在托盘上,托盘的右键菜单。
经验一：编译信号和槽 需要有.h .cpp这样的格式，否则不会生成相应的信号和槽；
经验二：信号和槽之间可以递参数，但是不允许函数直接给槽提供参数。
hello.h
#include <QtGui>
class myclass: public QWidget
{
Q_OBJECT
public:
myclass();
private:
QPushButton *b1;
QSystemTrayIcon *trayIcon;
char *msg;
void showMessage(char *msg);
private slots:
void showM();
void iconActivated(QSystemTrayIcon::ActivationReason reason);
};
hello.cpp
#include <QtGui>
#include "hello.h"
myclass::myclass()
{
QTextCodec::setCodecForTr(QTextCodec::codecForName("GB2312"));
setMinimumSize(200,100);
setMaximumSize(200,100);
b1=new QPushButton("hello world",this);
b1->setGeometry(20,20,160,40);
QIcon icon = QIcon("./images/bad.svg");
setWindowIcon(icon);
trayIcon = new QSystemTrayIcon(this);
trayIcon->setIcon(icon);
trayIcon->setToolTip("a trayicon example");
trayIcon->show();
setWindowTitle(tr("Systray"));
connect(trayIcon,SIGNAL(activated(QSystemTrayIcon::ActivationReason)),
this,SLOT(iconActivated(QSystemTrayIcon::ActivationReason)));
connect(b1,SIGNAL(clicked()),this,SLOT(showM()));
}
void myclass::showM()
{
QString titlec=tr("slot需要signal相同的参数进行传递");
QString textc=QString::fromLocal8Bit("测试内容单击、双击、中键、按钮");
trayIcon->showMessage(titlec,textc,QSystemTrayIcon::Information,5000);
}
void myclass::showMessage(char *msg)
{
QString titlec=tr(msg);
QString textc=QString::fromLocal8Bit("测试内容单击、双击、中键、按钮");
trayIcon->showMessage(titlec,textc,QSystemTrayIcon::Information,5000);
}
void myclass::iconActivated(QSystemTrayIcon::ActivationReason reason)
{
switch (reason) {
case QSystemTrayIcon::Trigger:
showMessage("单击");
break;
case QSystemTrayIcon::DoubleClick:
showMessage("双击啦");
break;
case QSystemTrayIcon::MiddleClick:
showMessage("你用的是三轮鼠标还是滚轮鼠标啊");
break;
default:
;
}
}
int main(int argc,char **argv)
{
QApplication testc(argc,argv);
myclass newc;
newc.show();
return testc.exec();
}
第三期:
那么最后我们把所有元素都结合在一起来实现这么一个托盘程序，比较上个例子我们增加了右键菜单并使它管理窗口的大小。
hello.h
#include <QtGui>
class myclass: public QWidget
{
Q_OBJECT
public:
myclass();
private:
QPushButton *b1;
QSystemTrayIcon *trayIcon;
char *msg;
void showMessage(char *msg);
void createActions();
void createTrayIcon();
QAction *minimizeAction;
QAction *maximizeAction;
QAction *restoreAction;
QAction *quitAction;
QMenu *trayIconMenu;
private slots:
void showM();
void iconActivated(QSystemTrayIcon::ActivationReason reason);
};
hello.cpp
#include <QtGui>
#include "hello.h"
myclass::myclass()
{
QTextCodec::setCodecForTr(QTextCodec::codecForName("GB2312"));
setMinimumSize(200,100);
b1=new QPushButton("hello world",this);
b1->setGeometry(20,20,160,40);
QIcon icon = QIcon("./images/bad.svg");
setWindowIcon(icon);
trayIcon = new QSystemTrayIcon(this);
trayIcon->setIcon(icon);
trayIcon->setToolTip("a trayicon example");
createActions();
createTrayIcon();
trayIcon->show();
setWindowTitle(tr("Systray"));
connect(trayIcon,SIGNAL(activated(QSystemTrayIcon::ActivationReason)),this,SLOT(iconActivated(QSystemTrayIcon::ActivationReason)));
connect(b1,SIGNAL(clicked()),this,SLOT(showM()));
}
void myclass::showM()
{
QString titlec=tr("slot需要signal相同的参数进行传递");
QString textc=QString::fromLocal8Bit("测试内容单击、双击、中键、按钮");
trayIcon->showMessage(titlec,textc,QSystemTrayIcon::Information,5000);
}
void myclass::showMessage(char *msg)
{
QString titlec=tr(msg);
QString textc=QString::fromLocal8Bit("测试内容单击、双击、中键、按钮");
trayIcon->showMessage(titlec,textc,QSystemTrayIcon::Information,5000);
}
void myclass::iconActivated(QSystemTrayIcon::ActivationReason reason)
{
switch (reason) {
case QSystemTrayIcon::Trigger:
showMessage("单击");
break;
case QSystemTrayIcon::DoubleClick:
showMessage("双击啦");
break;
case QSystemTrayIcon::MiddleClick:
showMessage("你用的是三轮鼠标还是滚轮鼠标啊");
break;
default:
;
}
}
void myclass::createActions()
{
minimizeAction = new QAction(tr("最小化 (&I)"), this);
connect(minimizeAction, SIGNAL(triggered()), this, SLOT(hide()));
maximizeAction = new QAction(tr("最大化 (&X)"), this);
connect(maximizeAction, SIGNAL(triggered()), this, SLOT(showMaximized()));
restoreAction = new QAction(tr("还原 (&R)"), this);
connect(restoreAction, SIGNAL(triggered()), this, SLOT(showNormal()));
quitAction = new QAction(tr("退出 (&Q)"), this);
connect(quitAction, SIGNAL(triggered()), qApp, SLOT(quit()));
}
void myclass::createTrayIcon()
{
trayIconMenu = new QMenu(this);
trayIconMenu->addAction(minimizeAction);
trayIconMenu->addAction(maximizeAction);
trayIconMenu->addAction(restoreAction);
trayIconMenu->addSeparator();
trayIconMenu->addAction(quitAction);
trayIcon->setContextMenu(trayIconMenu);
}
int main(int argc,char **argv)
{
QApplication testc(argc,argv);
myclass newc;
newc.show();
return testc.exec();
}
延伸阅读
----C++对话框系统托盘实现
