monitor/view/OverlayCenterDiagonal.qml

0001 /*
0002     SPDX-FileCopyrightText: 2020 Jean-Baptiste Mardelle <jb@kdenlive.org>
0003     SPDX-FileCopyrightText: 2018 Willian Pessoa
0004     SPDX-License-Identifier: GPL-3.0-only OR LicenseRef-KDE-Accepted-GPL
0005 */
0006
0007 import QtQuick.Controls 2.15
0008 import QtQuick 2.15
0009
0010 Item {
0011     id: overlay
0012     property double diagonalLength: Math.sqrt(Math.pow(parent.height, 2) + Math.pow(parent.width, 2))
0013
0014     function degreesRotation(width, height) {
0015         var a = height/width;
0016         var b = Math.sqrt(1 + Math.pow(a, 2));
0017         var angle = Math.acos(Math.pow(a,2) / (a * b));
0018         return angle * (180 / Math.PI);
0019     }
0020
0021     Rectangle {
0022         color: root.overlayColor
0023         width: overlay.diagonalLength
0024         height: 1
0025         rotation: degreesRotation(parent.height, parent.width)
0026         anchors.centerIn: parent
0027         antialiasing: true
0028     }
0029
0030     Rectangle {
0031         color: root.overlayColor
0032         height: overlay.diagonalLength
0033         width: 1
0034         rotation: degreesRotation(parent.width, parent.height)
0035         anchors.centerIn: parent
0036         antialiasing: true
0037     }
0038 }