Add desktop notification about failed captures

src/capture/widget/capturewidget.cpp

@@ -87,6 +87,7 @@ CaptureWidget::CaptureWidget(const uint id, const QString &forcedSavePath,
     bool ok = true;
     QPixmap fullScreenshot(ScreenGrabber().grabEntireDesktop(ok));
     if(!ok) {
+        SystemNotification().sendMessage(tr("Unable to capture screen"));
         this->close();
     }
     m_screenshot = new Screenshot(fullScreenshot, this);

src/core/flameshotdbusadapter.cpp

@@ -20,6 +20,7 @@
 #include "src/utils/screengrabber.h"
 #include "src/core/controller.h"
 #include "src/core/resourceexporter.h"
+#include "src/utils/systemnotification.h"
 #include <QTimer>
 #include <functional>
 #include <QBuffer>
@@ -70,7 +71,7 @@ void FlameshotDBusAdapter::fullScreen(
         bool ok = true;
         QPixmap p(ScreenGrabber().grabEntireDesktop(ok));
         if (!ok) {
-            // TODO notify
+            SystemNotification().sendMessage(tr("Unable to capture screen"));
             Q_EMIT captureFailed(id);
             return;
         }

src/main.cpp

@@ -188,7 +188,6 @@ int main(int argc, char *argv[]) {
         sessionBus.call(m);
 
         if (isRaw) {
-            // TODO
             // captureTaken
             sessionBus.connect("org.dharkael.Flameshot",
                                "/", "", "captureTaken",
@@ -225,7 +224,6 @@ int main(int argc, char *argv[]) {
         sessionBus.call(m);
 
         if (isRaw) {
-            // TODO
             // captureTaken
             sessionBus.connect("org.dharkael.Flameshot",
                                "/", "", "captureTaken",