Temporarily show sleep icon when receiving USR1

5 files changed, 438 insertions, 1 deletions

diff --git a/qt-lightdm-greeter.qrc b/qt-lightdm-greeter.qrc
index 93e3e45..d632f53 100644
--- a/qt-lightdm-greeter.qrc
+++ b/qt-lightdm-greeter.qrc
@@ -3,5 +3,6 @@
         <file>resources/dropdown.svg</file>
         <file>resources/leaveIcon.svg</file>
         <file>resources/bwlp.svg</file>
+        <file>resources/gnome-face-tired.svg</file>
     </qresource>
 </RCC>
diff --git a/resources/gnome-face-tired.svg b/resources/gnome-face-tired.svg
new file mode 100644
index 0000000..de43b1a
--- /dev/null
+++ b/resources/gnome-face-tired.svg
@@ -0,0 +1,376 @@
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+   xmlns:cc="http://creativecommons.org/ns#"
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+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:xlink="http://www.w3.org/1999/xlink"
+   viewBox="0 0 47.001228 49.000003"
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+     id="metadata7">
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+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+        <dc:title></dc:title>
+        <dc:creator>
+          <cc:Agent>
+            <dc:title>Lapo Calamandrei</dc:title>
+          </cc:Agent>
+        </dc:creator>
+        <cc:license
+           rdf:resource="http://creativecommons.org/licenses/GPL/2.0/" />
+        <dc:relation>emoticon, emots, smiley, saint, angel, smile</dc:relation>
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+      <cc:License
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+        <cc:permits
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+        <cc:permits
+           rdf:resource="http://web.resource.org/cc/Distribution" />
+        <cc:requires
+           rdf:resource="http://web.resource.org/cc/Notice" />
+        <cc:permits
+           rdf:resource="http://web.resource.org/cc/DerivativeWorks" />
+        <cc:requires
+           rdf:resource="http://web.resource.org/cc/ShareAlike" />
+        <cc:requires
+           rdf:resource="http://web.resource.org/cc/SourceCode" />
+      </cc:License>
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diff --git a/src/main.cpp b/src/main.cpp
index 7ba8758..a5fa5db 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -13,9 +13,13 @@
 #include <QIcon>
 #include <QPainter>
 #include <QMap>
+#include <QSocketNotifier>
 
 #include <fcntl.h>              /* Obtain O_* constant definitions */
 #include <unistd.h>
+#include <signal.h>
+#include <sys/types.h>
+#include <sys/socket.h>
 
 #include <iostream>
 
@@ -24,8 +28,12 @@
 #include "x11util.h"
 #include "global.h"
 
+static int sockets[2];
+
 static void createSimpleBackground();
 
+static void sigUsr1(int);
+
 static void messageHandler(QtMsgType type, const QMessageLogContext&, const QString& msg)
 {
     std::cerr << type << ": " << msg.toUtf8().constData() << '\n';
@@ -112,6 +120,21 @@ int main(int argc, char *argv[])
 		primary = screens.begin().key();
 	}
 
+	struct sigaction usr1;
+
+	usr1.sa_handler = &sigUsr1;
+	sigemptyset(&usr1.sa_mask);
+	usr1.sa_flags = SA_RESTART;
+
+	QSocketNotifier *sn = NULL;
+	if (sigaction(SIGUSR1, &usr1, 0) == 0 && ::socketpair(AF_UNIX, SOCK_STREAM, 0, sockets) == 0) {
+		sn = new QSocketNotifier(sockets[1], QSocketNotifier::Read);
+		QObject::connect(sn, &QSocketNotifier::activated, [](int fd) {
+			char tmp[1000];
+			read(fd, tmp, sizeof tmp);
+		});
+	}
+
     // Now set up all the screens
 	QPainter painter(&entire);
     MainWindow *focusWindow = 0;
@@ -120,6 +143,9 @@ int main(int argc, char *argv[])
     	it.next();
         MainWindow *w = new MainWindow(primary == it.key(), it.key(), it.value());
         w->show();
+		if (sn != NULL) {
+			QObject::connect(sn, SIGNAL(activated(int)), w, SLOT(showStandby()));
+		}
         if (w->showLoginForm()) {
             focusWindow = w;
         }
@@ -152,3 +178,9 @@ static void createSimpleBackground()
     img = img.scaled(QApplication::desktop()->size(), Qt::IgnoreAspectRatio, Qt::SmoothTransformation);
     AddPixmapToBackground(img.constBits(), img.width(), img.height(), 24, img.bytesPerLine(), img.byteCount());
 }
+
+static void sigUsr1(int)
+{
+	char a = 1;
+	::write(sockets[0], &a, sizeof(a));
+}
diff --git a/src/mainwindow.cpp b/src/mainwindow.cpp
index d58b7f6..0e6a5e7 100644
--- a/src/mainwindow.cpp
+++ b/src/mainwindow.cpp
@@ -18,6 +18,9 @@
 #include <QSvgRenderer>
 #include <QAbstractTextDocumentLayout>
 
+#include <sys/types.h>
+#include <sys/socket.h>
+
 #include "mainwindow.h"
 #include "loginform.h"
 #include "settings.h"
@@ -29,6 +32,7 @@ MainWindow::MainWindow(bool primary, int screen, const QRect &screenRect, QWidge
     QWidget(parent),
     m_ScreenRect(screenRect),
     m_Primary(primary),
+	m_LoginForm(NULL),
     m_messages(nullptr)
 {
     setObjectName(QString("MainWindow_%1").arg(screen));
@@ -254,4 +258,24 @@ void MainWindow::setBackground()
     this->setPalette(palette);
 }
 
-
+void MainWindow::showStandby()
+{
+	if (m_LoginForm != NULL) {
+		m_LoginForm->hide();
+	}
+	QSvgWidget *img = new QSvgWidget(":/resources/gnome-face-tired.svg", this);
+	if (img->renderer()->isValid()) {
+		QSize sh = img->sizeHint().scaled(this->width() / 2, this->height() / 2, Qt::KeepAspectRatio);
+		img->setGeometry((this->width() - sh.width()) / 2, (this->height() - sh.height()) / 2, sh.width(), sh.height());
+		img->show();
+	} else {
+		qWarning() << "Shice!";
+	}
+	QTimer::singleShot(8000, [this, img]() {
+		img->hide();
+		img->deleteLater();
+		if (this->m_LoginForm != NULL) {
+			m_LoginForm->show();
+		}
+	});
+}
diff --git a/src/mainwindow.h b/src/mainwindow.h
index 53c54e0..e136540 100644
--- a/src/mainwindow.h
+++ b/src/mainwindow.h
@@ -43,6 +43,10 @@ public:
     QImage& getBackground() { return m_background; }
 
     LoginForm* loginForm() { return m_LoginForm; }
+
+public slots:
+	void showStandby();
+
 private:
     int getOffset(QString offset, int maxVal, int defaultVal);
     void setBackground();