Question

我是QT新手，需要使用app-indicator构建应用。由于QT似乎比GTK +更容易，我在QT中制作它。

我要提到我已经安装了sni-qt，并且vlc和skype的app指示符在面板上显示正常。我在Ubuntu 13.04 64位上使用QT5。

我一步一步地遵循了本教程：http://qt-project.org/doc/qt-4.8/desktop-systray.html

但是当我运行它时，它出现的方式（十字架是我正在使用的图标）：

我该如何解决这个问题？

Answer 1

我担心目前sni-qt不支持Qt5，因此你要么必须等待支持它的新版本，要么使用this guide使用gtk +和libappindicator对其进行编码。甚至还有各种语言的例子。 Since Qt5 also distributes GLib events使集成变得更加容易。首先，你需要找出你是否在Unity上运行（以支持更多台式机而不仅仅是统一），你可以通过检索XDG_CURRENT_DESKTOP环境变量来做到这一点，如果它返回Unity你创建appindicator，否则创建QSystemTrayIcon。

首先，您需要包含必需的标题：

#undefine signals                                                  
extern "C" {                                                                 
  #include <libappindicator/app-indicator.h>                                 
  #include <gtk/gtk.h>                                                       
}                                                                            
#define signals public

由于app-indicator直接使用“信号”名称，我们需要取消定义通常转换为公共的默认Qt“关键字”信号。然后，由于我们编写C ++并且libappindicator是用C编写的，我们需要使用extern“C”来不使用C ++名称修改。

接下来根据我们的桌面创建AppIndicator / QSystemTrayIcon：

QString desktop;
bool is_unity;

desktop = getenv("XDG_CURRENT_DESKTOP");                                     
is_unity = (desktop.toLower() == "unity");                             

if (is_unity) { 
  AppIndicator *indicator;
  GtkWidget *menu, *item;                                                       

  menu = gtk_menu_new(); 

  item = gtk_menu_item_new_with_label("Quit");                             
  gtk_menu_shell_append(GTK_MENU_SHELL(menu), item);                          
  g_signal_connect(item, "activate",                                          
               G_CALLBACK(quitIndicator), qApp);  // We cannot connect 
               // gtk signal and qt slot so we need to create proxy 
               // function later on, we pass qApp pointer as an argument. 
               // This is useful when we need to call signals on "this" 
               //object so external function can access current object                         
  gtk_widget_show(item);

  indicator = app_indicator_new(                                       
  "unique-application-name",                                                   
      "indicator-messages",                                                                  
    APP_INDICATOR_CATEGORY_APPLICATION_STATUS                                
  );                                                                         

  app_indicator_set_status(indicator, APP_INDICATOR_STATUS_ACTIVE); 
  app_indicator_set_menu(indicator, GTK_MENU(menu));   
} else {
  QSystemTrayIcon *icon;
  QMenu *m = new QMenu();                                                   

  m->addAction(tr("Quit"), qApp, SLOT(quit()));                      
}

最后我们创建代理函数来调用它的Qt信号，声明我们需要使用extern“C”的函数，这样就不会有任何未定义的行为。

extern "C" {                                                                    
  void quitIndicator(GtkMenu *, gpointer);                                            
}

现在代理功能：

void quitIndicator(GtkMenu *menu, gpointer data) {                                    
  Q_UNUSED(menu);                                                               
  QApplication *self = static_cast<QApplication *>(data);                       

  self->quit();                                                                 
}

Answer 2

只是想添加，对于任何正在使用Qt并试图在Ubuntu 13+中显示应用指示器的人，因为其他人已经提到sni-qt无效，我能够使用上面的回复制作一个Qt应用程序工作，仍然试图让图标更改并显示弹出消息，但这是一个很好的开始，一旦我得到图标和消息工作，我可能会在我的网站上发布Voidrealms.com：

请务必sudo apt-get install libappindicator-dev

制作一个带有QDialog的新项目并进行修改，如下所示：

专业档案：

#-------------------------------------------------
#
# Project created by QtCreator 2014-03-28T20:34:54
#
#-------------------------------------------------

QT       += core gui

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

TARGET = PluginServiceGUI
TEMPLATE = app

# includes for the libappindicator
# /usr/lib/x86_64-linux-gnu libglib-2.0.a

INCLUDEPATH += "/usr/include/libappindicator-0.1"
INCLUDEPATH += "/usr/include/gtk-2.0"
INCLUDEPATH += "/usr/include/glib-2.0"
INCLUDEPATH += "/usr/lib/x86_64-linux-gnu/glib-2.0/include"
INCLUDEPATH += "/usr/include/cairo"
INCLUDEPATH += "/usr/include/pango-1.0"
INCLUDEPATH += "/usr/lib/x86_64-linux-gnu/gtk-2.0/include"
INCLUDEPATH += "/usr/include/gdk-pixbuf-2.0"
INCLUDEPATH += "/usr/include/atk-1.0"

LIBS += -L/usr/lib/x86_64-linux-gnu -lgobject-2.0
LIBS += -L/usr/lib/x86_64-linux-gnu -lappindicator
LIBS += -L/usr/lib/x86_64-linux-gnu -lgtk-x11-2.0

#These seem to not be needed
#LIBS += -L/usr/lib/x86_64-linux-gnu -lcairo
#LIBS += -L/usr/lib/x86_64-linux-gnu -lpango-1.0
#LIBS += -L/usr/lib/x86_64-linux-gnu -lglib-2.0

# end incudes for libappindicator


SOURCES += main.cpp\
        dialog.cpp

HEADERS  += dialog.h

FORMS    += dialog.ui

RESOURCES += \
    resources.qrc

在main.cpp

中

#include "dialog.h"
#include <QApplication>
#include <QtGui>
#include <QSystemTrayIcon>
#include <QMessageBox>
#include <QSystemTrayIcon>
#include <QMenu>

// http://stackoverflow.com/questions/17193307/qt-systray-icon-appears-next-to-launcher-on-ubuntu-instead-of-on-the-panel
// requires libappindicator-dev
// sudo apt-get install libappindicator-dev
// installs the headers in: /usr/include/libappindicator-0.1/libappindicator

#undef signals
extern "C" {
  #include <libappindicator/app-indicator.h>
  #include <gtk/gtk.h>

  void quitIndicator(GtkMenu *, gpointer);

}
#define signals public

void quitIndicator(GtkMenu *menu, gpointer data) {
  Q_UNUSED(menu);
  QApplication *self = static_cast<QApplication *>(data);

  self->quit();
}

void ShowUnityAppIndicator()
{
    AppIndicator *indicator;
    GtkWidget *menu, *item;

    menu = gtk_menu_new();

    item = gtk_menu_item_new_with_label("Quit");
    gtk_menu_shell_append(GTK_MENU_SHELL(menu), item);
    g_signal_connect(item, "activate",
                 G_CALLBACK(quitIndicator), qApp);  // We cannot connect
                 // gtk signal and qt slot so we need to create proxy
                 // function later on, we pass qApp pointer as an argument.
                 // This is useful when we need to call signals on "this"
                 //object so external function can access current object
    gtk_widget_show(item);

    indicator = app_indicator_new(
    "unique-application-name",
        "indicator-messages",
      APP_INDICATOR_CATEGORY_APPLICATION_STATUS
    );

    app_indicator_set_status(indicator, APP_INDICATOR_STATUS_ACTIVE);
    app_indicator_set_menu(indicator, GTK_MENU(menu));
}



void ShowQtSysTray(QApplication* app, QDialog* dialog)
{

    Q_INIT_RESOURCE(resources);

    if (!QSystemTrayIcon::isSystemTrayAvailable()) {
        QMessageBox::critical(0, QObject::tr("Systray"),
                              QObject::tr("I couldn't detect any system tray "
                                          "on this system."));
    }
    QApplication::setQuitOnLastWindowClosed(false);


    QSystemTrayIcon* trayIcon = new QSystemTrayIcon(dialog);
    QAction* Action = new QAction("hello", dialog);
    QMenu* trayIconMenu = new QMenu(dialog);

    trayIconMenu->addAction("Quit", app, SLOT(quit()));

    trayIconMenu->addAction(Action);
    trayIcon->setContextMenu(trayIconMenu);
    trayIcon->setIcon(QIcon (":/icons/Icons/accept.png"));

    trayIcon->show();
    trayIcon->showMessage("Title","Message");
}



int main(int argc, char *argv[])
{



        QApplication a(argc, argv);
         Dialog w;

         //Determine the desktop type
         QString desktop;
         bool is_unity;

         desktop = getenv("XDG_CURRENT_DESKTOP");
         is_unity = (desktop.toLower() == "unity");

         if(is_unity)
         {
            ShowUnityAppIndicator();
         }
         else
         {
             //Show the SystemTrayIcon the Qt way
             ShowQtSysTray(&a, &w);
         }

   // w.show();

    return a.exec();
}

QT Systray图标出现在Ubuntu上的启动器旁边而不是面板上

2 个答案: