add error message box

app/util/qopenhd.cpp

@@ -363,6 +363,11 @@ void QOpenHD::show_toast(QString message,bool long_toast)
     emit signal_toast_add(message,long_toast);
 }
 
+void QOpenHD::show_error_message(QString message)
+{
+
+}
+
 void QOpenHD::set_busy_for_milliseconds(int milliseconds,QString reason)
 {
     set_is_busy(true);

app/util/qopenhd.h

@@ -70,6 +70,11 @@ class QOpenHD : public QObject
     //
     Q_INVOKABLE void show_toast(QString message,bool long_toast=false);
     L_RO_PROP(QString,version_string,set_version_string,"2.5.4-evo-alpha");
+    //
+    // Shows a message popup to the user that needs to be clicked away - use sparingly
+    //
+    Q_INVOKABLE void show_error_message(QString message);
+    L_RO_PROP(QString,error_message_text,set_error_message_text,"");
     // Notify that something is going on for a specified amount of time
 public:
     Q_INVOKABLE void set_busy_for_milliseconds(int milliseconds,QString reason);

qml/main.qml

@@ -126,7 +126,9 @@ ApplicationWindow {
         WorkaroundMessageBox{
             id: workaroundmessagebox
         }
-
+        ErrorMessageBox{
+            id: errorMessageBox
+        }
         CardToast{
             id: card_toast
             m_text: _qopenhd.toast_text

qml/qml.qrc

@@ -305,5 +305,6 @@
         <file>ui/elements/NewSpinBox.qml</file>
         <file>ui/elements/NewSlider.qml</file>
         <file>ui/sidebar/InfoElement2.qml</file>
+        <file>ui/elements/ErrorMessageBox.qml</file>
     </qresource>
 </RCC>

qml/ui/elements/ErrorMessageBox.qml

@@ -0,0 +1,63 @@
+import QtQuick 2.12
+import QtQuick.Controls 2.12
+
+import QtQuick.Controls.Material 2.12
+import QtQuick.Layouts 1.0
+
+import Qt.labs.settings 1.0
+
+import OpenHD 1.0
+
+// We need this one to display popup messages to the user on platforms that don't support
+// QMessageBox (e.g. eglfs) since QMessageBox wants to open a new window
+// TODO make me less dirty / hacky
+// See the corrseponding .cpp class for more info
+Card {
+    id: errorMessageBox
+    width: 360
+    height: 340
+    z: 20.0
+    anchors.centerIn: parent
+    cardName: qsTr("ERROR")
+    cardNameColor: "red"
+    visible: _qopenhd.error_message_text!==""
+    cardBody: ScrollView {
+        contentHeight: errorMessageBox_text.height
+        contentWidth: errorMessageBox_text.width
+        ScrollBar.vertical.interactive: true
+        height: 200
+        width: 350
+        clip:true
+        anchors.centerIn: parent.Center
+        Text {
+            id: errorMessageBox_text
+            width: 320
+            text: _qopenhd.error_message_text
+            leftPadding: 12
+            rightPadding: 12
+            font.pixelSize: 14
+            wrapMode: Text.WordWrap
+        }
+    }
+    hasFooter: true
+    cardFooter: Item {
+        anchors.fill: parent
+        Button {
+            width: 140
+            height: 48
+            anchors.right: parent.right
+            anchors.rightMargin: 12
+            anchors.bottom: parent.bottom
+            anchors.bottomMargin: 6
+            font.pixelSize: 14
+            font.capitalization: Font.MixedCase
+            Material.accent: Material.Green
+            highlighted: true
+            text:  qsTr("Okay")
+            onPressed: {
+                _qopenhd.show_error_message("")
+                hudOverlayGrid.regain_focus()
+            }
+        }
+    }
+}