Add a Cura Tooltip to show in some buttons

Contributes to CURA-6004.

resources/qml/ToolTip.qml

@@ -0,0 +1,43 @@
+// Copyright (c) 2018 Ultimaker B.V.
+// Cura is released under the terms of the LGPLv3 or higher.
+
+import QtQuick 2.7
+import QtQuick.Controls 2.3
+
+import UM 1.0 as UM
+
+ToolTip
+{
+    // This property indicates when the tooltip has to show, for instance when a button is hovered
+    property bool show: false
+
+    property alias tooltipText: tooltip.text
+    property var targetPoint: Qt.point(0, 0)
+
+    id: tooltip
+    text: ""
+    delay: 500
+    visible: text != "" && show
+    font: UM.Theme.getFont("default")
+
+    background: UM.PointingRectangle
+    {
+        id: backgroundRect
+        color: UM.Theme.getColor("tooltip")
+
+        target: Qt.point(targetPoint.x - tooltip.x, targetPoint.y - tooltip.y)
+
+        arrowSize: UM.Theme.getSize("default_arrow").width
+    }
+
+    contentItem: Label
+    {
+        id: label
+        text: tooltip.text
+        font: tooltip.font
+        wrapMode: Text.Wrap
+        textFormat: Text.RichText
+        color: UM.Theme.getColor("tooltip_text")
+        renderType: Text.NativeRendering
+    }
+}