Qml/Main: add install dialog

src/leek/qml/Main.qml

@@ -39,13 +39,14 @@ Kirigami.ApplicationWindow {
         selectedNameFilter.index: 0
 
         onAccepted: {
-            installInfoDialog.open();
             QModInstaller.statusChanged.connect(() => {
                 switch (QModInstaller.status) {
                 case "initialized":
                     if (QModInstaller.installed) {
                         installInfoMessage.text = "This mod is already installed!";
                         installInfoDialog.open();
+                    } else {
+                        installDialog.open();
                     }
                     break;
                 case "NoModExceptionError":
@@ -62,6 +63,21 @@ Kirigami.ApplicationWindow {
         }
     }
 
+    Kirigami.Dialog {
+        id: installDialog
+        title: "Installing…"
+        // standardButtons: Kirigami.Dialog.Ok
+        closePolicy: Controls.Popup.NoAutoClose
+        showCloseButton: false
+        padding: Kirigami.Units.largeSpacing
+        Kirigami.LoadingPlaceholder {
+            // Layout.alignment: Qt.AlignCenter
+            anchors.centerIn: parent
+            determinate: false
+            text: "Unpacking…"
+        }
+    }
+
     Kirigami.Dialog {
         id: installInfoDialog
         title: "Add mod"