Added re-usable expandable component

CURA-5785

resources/qml/ExpandableComponent.qml

@@ -0,0 +1,77 @@
+import QtQuick 2.7
+import QtQuick.Controls 2.3
+
+// The expandable component has 3 major sub components:
+//      * The headerItem; Always visible and should hold some info about what happens if the component is expanded
+//      * The popupItem; The content that needs to be shown if the component is expanded.
+//      * The Button; The actual button that expands the popup.
+Item
+{
+    // The headerItem holds the QML item that is always displayed.
+    property alias headerItem: headerItemLoader.sourceComponent
+
+    // The popupItem holds the QML item that is shown when the "open" button is pressed
+    property var popupItem
+
+    // The background color of the popup
+    property color popupBackgroundColor: "white"
+
+    // How much spacing is needed around the popupItem
+    property alias padding: popup.padding
+
+    onPopupItemChanged:
+    {
+        // Since we want the size of the popup to be set by the size of the content,
+        // we need to do it like this.
+        popup.width = popupItem.width + 2 * popup.padding
+        popup.height = popupItem.height + 2 * popup.padding
+        popup.contentItem = popupItem
+    }
+
+    implicitHeight: 100
+    implicitWidth: 400
+
+    Loader
+    {
+        id: headerItemLoader
+        anchors
+        {
+            left: parent.left
+            right: collapseButton.left
+            top: parent.top
+            bottom: parent.bottom
+        }
+    }
+
+    Button
+    {
+        id: collapseButton
+        anchors
+        {
+            right: parent.right
+            top: parent.top
+            bottom: parent.bottom
+        }
+        text: popup.visible ? "close" : "open"
+        onClicked: popup.visible ? popup.close() : popup.open()
+    }
+
+    Popup
+    {
+        id: popup
+
+        // Ensure that the popup is located directly below the headerItem
+        y: headerItemLoader.height
+
+        // Make the popup right aligned with the rest.
+        x: -width + collapseButton.width + headerItemLoader.width
+
+        closePolicy: Popup.CloseOnPressOutsideParent
+
+        background: Rectangle
+        {
+            id: background
+            color: popupBackgroundColor
+        }
+    }
+}