Revert "QtGui is not needed in interfaces"

It breaks icons in several places

This reverts commit 2538a6a3e6.

interfaces/CMakeLists.txt

@@ -66,6 +66,7 @@ generate_export_header(kdeconnectinterfaces EXPORT_FILE_NAME ${CMAKE_CURRENT_BIN
 
 target_link_libraries(kdeconnectinterfaces
 LINK_PUBLIC
+    Qt5::Gui
     Qt5::DBus
 LINK_PRIVATE
     KF5::ConfigCore

interfaces/devicesmodel.cpp

@@ -26,6 +26,7 @@
 #include <QString>
 #include <QDBusInterface>
 #include <QDBusPendingReply>
+#include <QIcon>
 #include <QDBusServiceWatcher>
 
 #include "dbusinterfaces.h"
@@ -252,6 +253,10 @@ QVariant DevicesModel::data(const QModelIndex& index, int role) const
     switch (role) {
         case Qt::SizeHintRole:
             return QSize(0, 32);
+        case IconModelRole: {
+            QString icon = data(index, IconNameRole).toString();
+            return QIcon::fromTheme(icon);
+        }
         case IdModelRole:
             return device->id();
         case NameModelRole:

interfaces/devicesmodel.h

@@ -22,6 +22,7 @@
 #define DEVICESMODEL_H
 
 #include <QAbstractListModel>
+#include <QPixmap>
 #include <QList>
 
 #include "interfaces/kdeconnectinterfaces_export.h"

interfaces/notificationsmodel.cpp

@@ -24,6 +24,8 @@
 #include <QDebug>
 #include <QDBusInterface>
 
+#include <QIcon>
+
 //#include "modeltest.h"
 
 //In older Qt released, qAsConst isnt available
@@ -182,6 +184,8 @@ QVariant NotificationsModel::data(const QModelIndex& index, int role) const
 
     //FIXME: This function gets called lots of times, producing lots of dbus calls. Add a cache?
     switch (role) {
+        case IconModelRole:
+            return QIcon::fromTheme(QStringLiteral("device-notifier"));
         case IdModelRole:
             return notification->internalId();
         case NameModelRole:

interfaces/notificationsmodel.h

@@ -23,6 +23,7 @@
 
 #include <QAbstractItemModel>
 #include <QAbstractListModel>
+#include <QPixmap>
 #include <QList>
 
 #include "interfaces/dbusinterfaces.h"