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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Qt Quick Controls module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** 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.
**
** 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.LGPL3 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-3.0.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 (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
import QtQuick 2.2
import QtQuick.Controls 1.2
import QtQuick.Controls.Private 1.0
/*!
\qmltype ScrollViewHeader
\internal
\inqmlmodule QtQuick.Controls.Private
*/
Item {
id: scrollHelper
property alias horizontalScrollBar: hscrollbar
property alias verticalScrollBar: vscrollbar
property bool blockUpdates: false
property int availableHeight
property int availableWidth
property int contentHeight
property int contentWidth
property bool active
property int horizontalScrollBarPolicy: Qt.ScrollBarAsNeeded
property int verticalScrollBarPolicy: Qt.ScrollBarAsNeeded
property int leftMargin: outerFrame && root.__style ? root.__style.padding.left : 0
property int rightMargin: outerFrame && root.__style ? root.__style.padding.right : 0
property int topMargin: outerFrame && root.__style ? root.__style.padding.top : 0
property int bottomMargin: outerFrame && root.__style ? root.__style.padding.bottom : 0
anchors.fill: parent
Timer {
id: layoutTimer
interval: 0;
onTriggered: {
blockUpdates = true;
scrollHelper.contentWidth = flickableItem !== null ? flickableItem.contentWidth : 0
scrollHelper.contentHeight = flickableItem !== null ? flickableItem.contentHeight : 0
scrollHelper.availableWidth = viewport.width
scrollHelper.availableHeight = viewport.height
blockUpdates = false;
}
}
Connections {
target: viewport
onWidthChanged: layoutTimer.running = true
onHeightChanged: layoutTimer.running = true
}
Connections {
target: flickableItem
onContentWidthChanged: layoutTimer.running = true
onContentHeightChanged: layoutTimer.running = true
onContentXChanged: {
hscrollbar.flash()
vscrollbar.flash()
}
onContentYChanged: {
hscrollbar.flash()
vscrollbar.flash()
}
}
Loader {
id: cornerFill
z: 1
sourceComponent: __style ? __style.corner : null
anchors.right: parent.right
anchors.bottom: parent.bottom
anchors.bottomMargin: bottomMargin
anchors.rightMargin: rightMargin
width: visible ? vscrollbar.width : 0
height: visible ? hscrollbar.height : 0
visible: hscrollbar.visible && !hscrollbar.isTransient && vscrollbar.visible && !vscrollbar.isTransient
}
ScrollBar {
id: hscrollbar
readonly property int scrollAmount: contentWidth - availableWidth
readonly property bool scrollable: scrollAmount > 0
isTransient: !!__panel && !!__panel.isTransient
active: !!__panel && (__panel.sunken || __panel.activeControl !== "none")
enabled: !isTransient || __panel.visible
orientation: Qt.Horizontal
visible: horizontalScrollBarPolicy == Qt.ScrollBarAsNeeded ? scrollable : horizontalScrollBarPolicy == Qt.ScrollBarAlwaysOn
height: visible ? implicitHeight : 0
z: 1
maximumValue: scrollable ? scrollAmount : 0
minimumValue: 0
anchors.bottom: parent.bottom
anchors.left: parent.left
anchors.right: cornerFill.left
anchors.leftMargin: leftMargin
anchors.bottomMargin: bottomMargin
onScrollAmountChanged: {
if (flickableItem && (flickableItem.atXBeginning || flickableItem.atXEnd)) {
value = flickableItem.contentX - flickableItem.originX
}
}
onValueChanged: {
if (!blockUpdates) {
flickableItem.contentX = value + flickableItem.originX
}
}
Binding {
target: hscrollbar.__panel
property: "raised"
value: vscrollbar.active || scrollHelper.active
when: hscrollbar.isTransient
}
Binding {
target: hscrollbar.__panel
property: "visible"
value: true
when: !hscrollbar.isTransient || scrollHelper.active
}
function flash() {
if (hscrollbar.isTransient) {
hscrollbar.__panel.on = true
hscrollbar.__panel.visible = true
hFlasher.start()
}
}
Timer {
id: hFlasher
interval: 10
onTriggered: hscrollbar.__panel.on = false
}
}
ScrollBar {
id: vscrollbar
readonly property int scrollAmount: contentHeight - availableHeight
readonly property bool scrollable: scrollAmount > 0
isTransient: !!__panel && !!__panel.isTransient
active: !!__panel && (__panel.sunken || __panel.activeControl !== "none")
enabled: !isTransient || __panel.visible
orientation: Qt.Vertical
visible: verticalScrollBarPolicy === Qt.ScrollBarAsNeeded ? scrollable : verticalScrollBarPolicy === Qt.ScrollBarAlwaysOn
width: visible ? implicitWidth : 0
z: 1
anchors.bottom: cornerFill.top
maximumValue: scrollable ? scrollAmount + __viewTopMargin : 0
minimumValue: 0
anchors.right: parent.right
anchors.top: parent.top
anchors.topMargin: __scrollBarTopMargin + topMargin
anchors.rightMargin: rightMargin
onScrollAmountChanged: {
if (flickableItem && (flickableItem.atYBeginning || flickableItem.atYEnd)) {
value = flickableItem.contentY - flickableItem.originY
}
}
onValueChanged: {
if (flickableItem && !blockUpdates && enabled) {
flickableItem.contentY = value + flickableItem.originY
}
}
Binding {
target: vscrollbar.__panel
property: "raised"
value: hscrollbar.active || scrollHelper.active
when: vscrollbar.isTransient
}
Binding {
target: vscrollbar.__panel
property: "visible"
value: true
when: !vscrollbar.isTransient || scrollHelper.active
}
function flash() {
if (vscrollbar.isTransient) {
vscrollbar.__panel.on = true
vscrollbar.__panel.visible = true
vFlasher.start()
}
}
Timer {
id: vFlasher
interval: 10
onTriggered: vscrollbar.__panel.on = false
}
}
}
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