CheckBox.qml Example File

 /****************************************************************************
 **
 ** Copyright (C) 2017 The Qt Company Ltd.
 ** Contact: https://www.qt.io/licensing/
 **
 ** This file is part of the examples of the Qt Toolkit.
 **
 ** $QT_BEGIN_LICENSE:BSD$
 ** 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 https://www.qt.io/terms-conditions. For further
 ** information use the contact form at https://www.qt.io/contact-us.
 **
 ** BSD License Usage
 ** Alternatively, you may use this file under the terms of the BSD license
 ** as follows:
 **
 ** "Redistribution and use in source and binary forms, with or without
 ** modification, are permitted provided that the following conditions are
 ** met:
 **   * Redistributions of source code must retain the above copyright
 **     notice, this list of conditions and the following disclaimer.
 **   * Redistributions in binary form must reproduce the above copyright
 **     notice, this list of conditions and the following disclaimer in
 **     the documentation and/or other materials provided with the
 **     distribution.
 **   * Neither the name of The Qt Company Ltd nor the names of its
 **     contributors may be used to endorse or promote products derived
 **     from this software without specific prior written permission.
 **
 **
 ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
 **
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/

 import QtQuick 2.12
 import QtQuick.Templates 2.12 as T
 import Theme 1.0

 T.CheckBox {
     id: control

     font: Theme.font

     implicitWidth: Math.max(background ? background.implicitWidth : 0,
                                          contentItem.implicitWidth + leftPadding + rightPadding)
     implicitHeight: Math.max(background ? background.implicitHeight : 0,
                                           Math.max(contentItem.implicitHeight,
                                                    indicator ? indicator.implicitHeight : 0) + topPadding + bottomPadding)
     leftPadding: 4
     indicator: Rectangle {
         id: checkboxHandle
         implicitWidth: Theme.baseSize * 2.6
         implicitHeight: Theme.baseSize * 2.6
         x: control.leftPadding
         anchors.verticalCenter: parent.verticalCenter
         radius: 2
         border.color: Theme.mainColor

         Rectangle {
             id: rectangle
             width: Theme.baseSize * 1.4
             height: Theme.baseSize * 1.4
             x: Theme.baseSize * 0.6
             y: Theme.baseSize * 0.6
             radius: Theme.baseSize * 0.4
             visible: false
             color: Theme.mainColor
         }

         states: [
             State {
                 name: "unchecked"
                 when: !control.checked && !control.down
             },
             State {
                 name: "checked"
                 when: control.checked && !control.down

                 PropertyChanges {
                     target: rectangle
                     visible: true
                 }
             },
             State {
                 name: "unchecked_down"
                 when: !control.checked && control.down

                 PropertyChanges {
                     target: rectangle
                     color: Theme.mainColorDarker
                 }

                 PropertyChanges {
                     target: checkboxHandle
                     border.color: Theme.mainColorDarker
                 }
             },
             State {
                 name: "checked_down"
                 extend: "unchecked_down"
                 when: control.checked && control.down

                 PropertyChanges {
                     target: rectangle
                     visible: true
                 }
             }
         ]
     }

     background: Rectangle {
         implicitWidth: 140
         implicitHeight: Theme.baseSize * 3.8
         color: Theme.lightGray
         border.color: Theme.gray
     }

     contentItem: Text {
         leftPadding: control.indicator.width + 4

         text: control.text
         font: control.font
         color: Theme.dark
         elide: Text.ElideRight
         visible: control.text
         horizontalAlignment: Text.AlignLeft
         verticalAlignment: Text.AlignVCenter
     }
 }