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diff --git a/src/quickcontrols2/material/RoundButton.qml b/src/quickcontrols2/material/RoundButton.qml
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+++ b/src/quickcontrols2/material/RoundButton.qml
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+/****************************************************************************
+**
+** Copyright (C) 2017 The Qt Company Ltd.
+** Contact: http://www.qt.io/licensing/
+**
+** This file is part of the Qt Quick Controls 2 module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL3$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see http://www.qt.io/terms-conditions. For further
+** information use the contact form at http://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPLv3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or later as published by the Free
+** Software Foundation and appearing in the file LICENSE.GPL included in
+** the packaging of this file. Please review the following information to
+** ensure the GNU General Public License version 2.0 requirements will be
+** met: http://www.gnu.org/licenses/gpl-2.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+import QtQuick
+import QtQuick.Templates as T
+import QtQuick.Controls.impl
+import QtQuick.Controls.Material
+import QtQuick.Controls.Material.impl
+
+T.RoundButton {
+    id: control
+
+    implicitWidth: Math.max(implicitBackgroundWidth + leftInset + rightInset,
+                            implicitContentWidth + leftPadding + rightPadding)
+    implicitHeight: Math.max(implicitBackgroundHeight + topInset + bottomInset,
+                             implicitContentHeight + topPadding + bottomPadding)
+
+    topInset: 6
+    leftInset: 6
+    rightInset: 6
+    bottomInset: 6
+    padding: 12
+    spacing: 6
+
+    icon.width: 24
+    icon.height: 24
+    icon.color: !enabled ? Material.hintTextColor :
+        flat && highlighted ? Material.accentColor :
+        highlighted ? Material.primaryHighlightedTextColor : Material.foreground
+
+    Material.elevation: flat ? control.down || control.hovered ? 2 : 0
+                             : control.down ? 12 : 6
+    Material.background: flat ? "transparent" : undefined
+
+    contentItem: IconLabel {
+        spacing: control.spacing
+        mirrored: control.mirrored
+        display: control.display
+
+        icon: control.icon
+        text: control.text
+        font: control.font
+        color: !control.enabled ? control.Material.hintTextColor :
+            control.flat && control.highlighted ? control.Material.accentColor :
+            control.highlighted ? control.Material.primaryHighlightedTextColor : control.Material.foreground
+    }
+
+    // TODO: Add a proper ripple/ink effect for mouse/touch input and focus state
+    background: Rectangle {
+        implicitWidth: control.Material.buttonHeight
+        implicitHeight: control.Material.buttonHeight
+
+        radius: control.radius
+        color: !control.enabled ? control.Material.buttonDisabledColor
+            : control.checked || control.highlighted ? control.Material.highlightedButtonColor : control.Material.buttonColor
+
+        Rectangle {
+            width: parent.width
+            height: parent.height
+            radius: control.radius
+            visible: control.hovered || control.visualFocus
+            color: control.Material.rippleColor
+        }
+
+        Rectangle {
+            width: parent.width
+            height: parent.height
+            radius: control.radius
+            visible: control.down
+            color: control.Material.rippleColor
+        }
+
+        // The layer is disabled when the button color is transparent so that you can do
+        // Material.background: "transparent" and get a proper flat button without needing
+        // to set Material.elevation as well
+        layer.enabled: control.enabled && control.Material.buttonColor.a > 0
+        layer.effect: ElevationEffect {
+            elevation: control.Material.elevation
+        }
+    }
+}