QML: auto positioning window

main.qml

@@ -2,6 +2,7 @@ import QtQuick 2.10
 import QtQuick.Controls 2.3
 // import QtQuick.Controls.Material 2.3
 import QtQuick.Layouts 1.3
+import QtQuick.Window 2.2
 
 import Qt.labs.platform 1.0 as Labs
 
@@ -10,7 +11,8 @@ import VirtScreen.Backend 1.0
 
 ApplicationWindow {
     id: window
-    visible: true
+    visible: false
+    flags: Qt.FramelessWindowHint
     title: "Basic layouts"
 
     // Material.theme: Material.Light
@@ -20,6 +22,14 @@ ApplicationWindow {
     width: 380
     height: 600
 
+    // hide screen when loosing focus
+    onActiveFocusItemChanged: {
+        if (!activeFocusItem) {
+            this.hide();
+        }
+    }
+
+    // virtscreen.py hackend.
     Backend {
         id: backend
     }
@@ -235,6 +245,17 @@ ApplicationWindow {
         }
 
         onActivated: {
+            if (window.visible) {
+                window.hide();
+                return;
+            }
+            // Move window to the corner of the primary display
+            var width = backend.primaryDisplayWidth;
+            var height = backend.primaryDisplayHeight;
+            var x_mid = width / 2;
+            var y_mid = height / 2;
+            window.x = (backend.cursor_x > x_mid)? width - window.width : 0;
+            window.y = (backend.cursor_y > y_mid)? height - window.height : 0;
             window.show()
             window.raise()
             window.requestActivate()

virtscreen.py

@@ -6,7 +6,7 @@ from enum import Enum
 from PyQt5.QtWidgets import QApplication
 from PyQt5.QtCore import  QObject, QUrl, Qt
 from PyQt5.QtCore import pyqtProperty, pyqtSlot, pyqtSignal
-from PyQt5.QtGui import QIcon
+from PyQt5.QtGui import QIcon, QCursor
 from PyQt5.QtQml import qmlRegisterType, QQmlApplicationEngine
 
 from twisted.internet import protocol, error
@@ -243,6 +243,11 @@ class Backend(QObject):
         self._vncPort = 5900
         self._vncPassword = ""
         self._vncState = VNCState.OFF
+        # Primary screen and mouse posistion
+        self._cursor_x: int
+        self._cursor_y: int
+        self._primaryDisplayWidth: int
+        self._primaryDisplayHeight: int
         # objects
         self.xrandr = XRandR()
         
@@ -306,6 +311,30 @@ class Backend(QObject):
         self._vncState = state
         self.vncStateChanged.emit(self._vncState.value)
     
+    @pyqtProperty(int)
+    def cursor_x(self):
+        cursor = QCursor().pos()
+        self._cursor_x = cursor.x()
+        return self._cursor_x
+
+    @pyqtProperty(int)
+    def cursor_y(self):
+        cursor = QCursor().pos()
+        self._cursor_y = cursor.y()
+        return self._cursor_y
+
+    @pyqtProperty(int)
+    def primaryDisplayWidth(self):
+        screen = QApplication.desktop().screenGeometry()
+        self._primaryDisplayWidth = screen.width()
+        return self._primaryDisplayWidth
+
+    @pyqtProperty(int)
+    def primaryDisplayHeight(self):
+        screen = QApplication.desktop().screenGeometry()
+        self._primaryDisplayHeight = screen.height()
+        return self._primaryDisplayHeight
+    
     # Qt Slots
     @pyqtSlot()
     def createVirtScreen(self):
@@ -417,7 +446,7 @@ if __name__ == '__main__':
     engine = QQmlApplicationEngine()
     engine.load(QUrl('main.qml'))
     if not engine.rootObjects():
-        print("Failed to load qml")
+        QMessageBox.critical(None, "VirtScreen", "Failed to load qml")
-        exit(1)
+        sys.exit(1)
     sys.exit(app.exec_())
     reactor.run()