Merge pull request #541 from Yubico/monitor-check

Make sure the application is always visible on a monitor

main.cpp

@@ -1,4 +1,5 @@
 #include <QApplication>
+#include <QDesktopWidget>
 #include <QQmlApplicationEngine>
 #include <QQmlContext>
 #include <stdlib.h>
@@ -46,6 +47,21 @@ int main(int argc, char *argv[])
     application.setOrganizationName("Yubico");
     application.setOrganizationDomain("com.yubico");
 
+    // Get x and y coordinates of all monitors
+    QVariantList monitorAreas;
+    for (QScreen* screen : QGuiApplication::screens())  {
+        QRect monitorArea = screen->geometry();
+
+        QVariantMap coordinates;
+
+        coordinates.insert("xMin", monitorArea.x());
+        coordinates.insert("xMax", monitorArea.x() + monitorArea.width());
+        coordinates.insert("yMin", monitorArea.y());
+        coordinates.insert("yMax", monitorArea.y() + monitorArea.height());
+
+        monitorAreas << coordinates;
+    }
+
     QQuickStyle::setStyle("Material");
 
     QCommandLineParser cliParser;
@@ -97,6 +113,7 @@ int main(int argc, char *argv[])
     engine.rootContext()->setContextProperty("appVersion", APP_VERSION);
     engine.rootContext()->setContextProperty("ScreenShot", &screenshot);
     engine.rootContext()->setContextProperty("application", &application);
+    engine.rootContext()->setContextProperty("monitorAreas", monitorAreas);
     engine.load(QUrl(url_prefix + main_qml));
 
 

qml/main.qml

@@ -139,6 +139,30 @@ ApplicationWindow {
                 && (settings.desktopAvailableHeight === Screen.desktopAvailableHeight)
         app.x = (savedScreenLayout) ? settings.x : Screen.width / 2 - app.width / 2
         app.y = (savedScreenLayout) ? settings.y : Screen.height / 2 - app.height / 2
+
+        function isWindowPositionInsideSomeMonitor() {
+            for (var i = 0; i < monitorAreas.length; i++)  {
+                var xMin = monitorAreas[i].xMin
+                var xMax = monitorAreas[i].xMax
+                var yMin = monitorAreas[i].yMin
+                var yMax = monitorAreas[i].yMax
+
+                if (app.x > xMin && app.x < xMax) {
+                    if (app.y > yMin && app.y < yMax) {
+                        return true
+                    }
+                }
+            }
+            return false
+        }
+
+        // If app.x and app.y are outside of the available screen geometry,
+        // put the app in the middle of the screen.
+        if (!isWindowPositionInsideSomeMonitor()) {
+            app.x = Screen.width / 2 - app.width / 2
+            app.y = Screen.height / 2 - app.height / 2
+        }
+
     }
 
     function updateTrayVisibility() {