阻抗弹窗
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/****************************************************************************
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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.Controls 1.2
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import QtQuick.Controls.Private 1.0
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/*!
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\qmltype ScrollViewHeader
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\internal
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\inqmlmodule QtQuick.Controls.Private
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*/
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Item {
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id: scrollHelper
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property alias horizontalScrollBar: hscrollbar
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property alias verticalScrollBar: vscrollbar
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property bool blockUpdates: false
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property int availableHeight
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property int availableWidth
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property int contentHeight
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property int contentWidth
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property bool active
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property int horizontalScrollBarPolicy: Qt.ScrollBarAsNeeded
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property int verticalScrollBarPolicy: Qt.ScrollBarAsNeeded
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property int leftMargin: outerFrame && root.__style ? root.__style.padding.left : 0
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property int rightMargin: outerFrame && root.__style ? root.__style.padding.right : 0
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property int topMargin: outerFrame && root.__style ? root.__style.padding.top : 0
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property int bottomMargin: outerFrame && root.__style ? root.__style.padding.bottom : 0
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anchors.fill: parent
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Timer {
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id: layoutTimer
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interval: 0;
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onTriggered: {
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blockUpdates = true;
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scrollHelper.contentWidth = flickableItem !== null ? flickableItem.contentWidth : 0
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scrollHelper.contentHeight = flickableItem !== null ? flickableItem.contentHeight : 0
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scrollHelper.availableWidth = viewport.width
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scrollHelper.availableHeight = viewport.height
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blockUpdates = false;
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hscrollbar.valueChanged();
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vscrollbar.valueChanged();
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}
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}
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Connections {
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target: viewport
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onWidthChanged: layoutTimer.running = true
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onHeightChanged: layoutTimer.running = true
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}
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Connections {
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target: flickableItem
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onContentWidthChanged: layoutTimer.running = true
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onContentHeightChanged: layoutTimer.running = true
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onContentXChanged: {
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hscrollbar.flash()
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vscrollbar.flash()
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}
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onContentYChanged: {
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hscrollbar.flash()
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vscrollbar.flash()
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}
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}
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Loader {
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id: cornerFill
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z: 1
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sourceComponent: __style ? __style.corner : null
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anchors.right: parent.right
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anchors.bottom: parent.bottom
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anchors.bottomMargin: bottomMargin
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anchors.rightMargin: rightMargin
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width: visible ? vscrollbar.width : 0
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height: visible ? hscrollbar.height : 0
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visible: hscrollbar.visible && !hscrollbar.isTransient && vscrollbar.visible && !vscrollbar.isTransient
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}
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ScrollBar {
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id: hscrollbar
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readonly property int scrollAmount: contentWidth - availableWidth
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readonly property bool scrollable: scrollAmount > 0
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isTransient: !!__panel && !!__panel.isTransient
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active: !!__panel && (__panel.sunken || __panel.activeControl !== "none")
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enabled: !isTransient || __panel.visible
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orientation: Qt.Horizontal
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visible: horizontalScrollBarPolicy == Qt.ScrollBarAsNeeded ? scrollable : horizontalScrollBarPolicy == Qt.ScrollBarAlwaysOn
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height: visible ? implicitHeight : 0
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z: 1
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maximumValue: scrollable ? scrollAmount : 0
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minimumValue: 0
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anchors.bottom: parent.bottom
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anchors.left: parent.left
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anchors.right: cornerFill.left
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anchors.leftMargin: leftMargin
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anchors.bottomMargin: bottomMargin
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onScrollAmountChanged: {
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var scrollableAmount = scrollable ? scrollAmount : 0
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if (flickableItem && (flickableItem.atXBeginning || flickableItem.atXEnd)) {
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value = Math.min(scrollableAmount, flickableItem.contentX - flickableItem.originX);
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} else if (value > scrollableAmount) {
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value = scrollableAmount;
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}
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}
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onValueChanged: {
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if (!blockUpdates) {
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flickableItem.contentX = value + flickableItem.originX
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}
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}
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Binding {
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target: hscrollbar.__panel
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property: "raised"
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value: vscrollbar.active || scrollHelper.active
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when: hscrollbar.isTransient
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}
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Binding {
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target: hscrollbar.__panel
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property: "visible"
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value: true
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when: !hscrollbar.isTransient || scrollHelper.active
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}
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function flash() {
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if (hscrollbar.isTransient) {
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hscrollbar.__panel.on = true
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hscrollbar.__panel.visible = true
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hFlasher.start()
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}
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}
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Timer {
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id: hFlasher
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interval: 10
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onTriggered: hscrollbar.__panel.on = false
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}
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}
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ScrollBar {
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id: vscrollbar
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readonly property int scrollAmount: contentHeight - availableHeight
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readonly property bool scrollable: scrollAmount > 0
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isTransient: !!__panel && !!__panel.isTransient
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active: !!__panel && (__panel.sunken || __panel.activeControl !== "none")
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enabled: !isTransient || __panel.visible
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orientation: Qt.Vertical
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visible: verticalScrollBarPolicy === Qt.ScrollBarAsNeeded ? scrollable : verticalScrollBarPolicy === Qt.ScrollBarAlwaysOn
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width: visible ? implicitWidth : 0
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z: 1
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anchors.bottom: cornerFill.top
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maximumValue: scrollable ? scrollAmount + __viewTopMargin : 0
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minimumValue: 0
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anchors.right: parent.right
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anchors.top: parent.top
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anchors.topMargin: __scrollBarTopMargin + topMargin
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anchors.rightMargin: rightMargin
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onScrollAmountChanged: {
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if (flickableItem && (flickableItem.atYBeginning || flickableItem.atYEnd)) {
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value = flickableItem.contentY - flickableItem.originY
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}
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}
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onValueChanged: {
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if (flickableItem && !blockUpdates && enabled) {
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flickableItem.contentY = value + flickableItem.originY
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}
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}
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Binding {
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target: vscrollbar.__panel
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property: "raised"
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value: hscrollbar.active || scrollHelper.active
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when: vscrollbar.isTransient
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}
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Binding {
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target: vscrollbar.__panel
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property: "visible"
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value: true
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when: !vscrollbar.isTransient || scrollHelper.active
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}
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function flash() {
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if (vscrollbar.isTransient) {
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vscrollbar.__panel.on = true
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vscrollbar.__panel.visible = true
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vFlasher.start()
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}
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}
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Timer {
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id: vFlasher
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interval: 10
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onTriggered: vscrollbar.__panel.on = false
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}
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}
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}
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