109 lines
4.4 KiB
QML
109 lines
4.4 KiB
QML
/****************************************************************************
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**
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** Copyright (C) 2016 The Qt Company Ltd.
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** Contact: https://www.qt.io/licensing/
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**
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** This file is part of the Qt Quick Controls module of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and The Qt Company. For licensing terms
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** and conditions see https://www.qt.io/terms-conditions. For further
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** information use the contact form at https://www.qt.io/contact-us.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 3 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL3 included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 3 requirements
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** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 2.0 or (at your option) the GNU General
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** Public license version 3 or any later version approved by the KDE Free
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** Qt Foundation. The licenses are as published by the Free Software
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** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
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** included in the packaging of this file. Please review the following
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** information to ensure the GNU General Public License requirements will
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** be met: https://www.gnu.org/licenses/gpl-2.0.html and
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** https://www.gnu.org/licenses/gpl-3.0.html.
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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import QtQuick 2.2
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import QtQuick.Layouts 1.1
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Item {
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id: contentItem
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property real minimumWidth: __calcMinimum('Width')
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property real minimumHeight: __calcMinimum('Height')
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property real maximumWidth: Number.POSITIVE_INFINITY
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property real maximumHeight: Number.POSITIVE_INFINITY
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implicitWidth: __calcImplicitWidth()
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implicitHeight: __calcImplicitHeight()
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/*! \internal */
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property Item __layoutItem: contentItem.visibleChildren.length === 1 ? contentItem.visibleChildren[0] : null
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/*! \internal */
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property real __marginsWidth: __layoutItem ? __layoutItem.anchors.leftMargin + __layoutItem.anchors.rightMargin : 0
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/*! \internal */
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property real __marginsHeight: __layoutItem ? __layoutItem.anchors.topMargin + __layoutItem.anchors.bottomMargin : 0
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/*! \internal */
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property bool __noMinimumWidthGiven : false
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/*! \internal */
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property bool __noMinimumHeightGiven : false
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/*! \internal */
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property bool __noImplicitWidthGiven : false
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/*! \internal */
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property bool __noImplicitHeightGiven : false
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function __calcImplicitWidth() {
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if (__layoutItem && __layoutItem.anchors.fill)
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return __calcImplicit('Width')
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return contentItem.childrenRect.x + contentItem.childrenRect.width
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}
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function __calcImplicitHeight() {
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if (__layoutItem && __layoutItem.anchors.fill)
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return __calcImplicit('Height')
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return contentItem.childrenRect.y + contentItem.childrenRect.height
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}
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function __calcImplicit(hw) {
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var pref = __layoutItem.Layout['preferred' + hw]
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if (pref < 0) {
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pref = __layoutItem['implicit' + hw]
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}
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contentItem['__noImplicit' + hw + 'Given'] = (pref === 0 ? true : false)
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pref += contentItem['__margins' + hw]
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return pref
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}
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function __calcMinimum(hw) { // hw is 'Width' or 'Height'
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return (__layoutItem && __layoutItem.anchors.fill) ? __calcMinMax('minimum', hw) : 0
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}
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function __calcMaximum(hw) { // hw is 'Width' or 'Height'
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return (__layoutItem && __layoutItem.anchors.fill) ? __calcMinMax('maximum', hw) : Number.POSITIVE_INFINITY
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}
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function __calcMinMax(minMaxConstraint, hw) {
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var attachedPropName = minMaxConstraint + hw
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var extent = __layoutItem.Layout[attachedPropName]
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if (minMaxConstraint === 'minimum')
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contentItem['__noMinimum' + hw + 'Given'] = (extent === 0 ? true : false)
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extent += contentItem['__margins' + hw]
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return extent
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}
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}
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