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Jani Heikkinen authored
Qt copyrights are now in The Qt Company, so we could update the source code headers accordingly. In the same go we should also fix the links to point to qt.io. Change-Id: Id0bb1fd5a9d695520753a280bb1ad5ba1ccc6026 Reviewed-by:Sergio Ahumada <sahumada@texla.cl>
cf82978a
/******************************************************************************** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).** Contact: http://www.qt-project.org/legal**** This file is part of the Qt Quick Controls module of the Qt Toolkit.**** $QT_BEGIN_LICENSE:BSD$** 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 Digia Plc and its Subsidiary(-ies) 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 2.1import QtQuick.Controls 1.0import QtQuick.Controls.Private 1.0import QtQuick.Controls.Styles 1.0/*! \qmltype ScrollView \inqmlmodule QtQuick.Controls 1.0 \since QtQuick.Controls 1.0 \ingroup views \brief Provides a scrolling view within another Item. A ScrollView can be used either to replace a \l Flickable or decorate an existing \l Flickable. Depending on the platform, it will add scroll bars and a content frame. Only one Item can be a direct child of the ScrollView and the child is implicitly anchored to fill the scroll view. Example: \code ScrollView { Image { imageSource: "largeImage.png" } } \endcode In the previous example the Image item will implicitly get scroll behavior as if it was used within a \l Flickable. The width and height of the child item will be used to define the size of the content area.7172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140
Example:
\code
ScrollView {
ListView {
...
}
}
\endcode
In this case the content size of the ScrollView will simply mirror that of its contained
\l flickableItem.
You can create a custom appearance for a ScrollView by
assigning a \l ScrollViewStyle.
*/
FocusScope {
id: root
implicitWidth: 240
implicitHeight: 150
/*!
This property tells the ScrollView if it should render
a frame around its content.
The default value is \c false.
*/
property bool frameVisible: false
/*!
This property controls if there should be a highlight
around the frame when the ScrollView has input focus.
The default value is \c false.
\note This property is only applicable on some platforms, such
as Mac OS.
*/
property bool highlightOnFocus: false
/*!
\qmlproperty Item ScrollView::viewport
The viewport determines the current "window" on the contentItem.
In other words, it clips it and the size of the viewport tells you
how much of the content area is visible.
*/
property alias viewport: viewportItem
/*!
\qmlproperty Item ScrollView::flickableItem
The flickableItem of the ScrollView. If the contentItem provided
to the ScrollView is a Flickable, it will be the \l contentItem.
*/
readonly property alias flickableItem: internal.flickableItem
/*!
The contentItem of the ScrollView. This is set by the user.
Note that the definition of contentItem is somewhat different to that
of a Flickable, where the contentItem is implicitly created.
*/
default property Item contentItem
/*! \internal */
property Item __scroller: scroller
/*! \internal */
property int __scrollBarTopMargin: 0
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/*! \internal */
property int __viewTopMargin: 0
/*! \internal */
property alias __horizontalScrollBar: scroller.horizontalScrollBar
/*! \internal */
property alias __verticalScrollBar: scroller.verticalScrollBar
/*! \internal */
property Component style: Qt.createComponent(Settings.style + "/ScrollViewStyle.qml", root)
/*! \internal */
property Style __style: styleLoader.item
activeFocusOnTab: true
onContentItemChanged: {
if (contentItem.hasOwnProperty("contentY") && // Check if flickable
contentItem.hasOwnProperty("contentHeight")) {
internal.flickableItem = contentItem // "Use content if it is a flickable
internal.flickableItem.parent = viewportItem
} else {
internal.flickableItem = flickableComponent.createObject(viewportItem)
contentItem.parent = internal.flickableItem.contentItem
}
internal.flickableItem.anchors.fill = viewportItem
internal.flickableItem.interactive = false
}
children: Item {
id: internal
property Flickable flickableItem
Loader {
id: styleLoader
sourceComponent: style
onStatusChanged: {
if (status === Loader.Error)
console.error("Failed to load Style for", root)
}
property alias __control: root
}
Binding {
target: flickableItem
property: "contentHeight"
when: contentItem !== flickableItem
value: contentItem ? contentItem.height : 0
}
Binding {
target: flickableItem
when: contentItem !== flickableItem
property: "contentWidth"
value: contentItem ? contentItem.width : 0
}
Connections {
target: flickableItem
onContentYChanged: {
scroller.blockUpdates = true
scroller.verticalScrollBar.value = flickableItem.contentY
scroller.blockUpdates = false
}
onContentXChanged: {
scroller.blockUpdates = true
scroller.horizontalScrollBar.value = flickableItem.contentX
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scroller.blockUpdates = false
}
}
anchors.fill: parent
Component {
id: flickableComponent
Flickable {}
}
WheelArea {
id: wheelArea
parent: flickableItem
// ### Note this is needed due to broken mousewheel behavior in Flickable.
anchors.fill: parent
property int acceleration: 40
property int flickThreshold: 20
property real speedThreshold: 3
property real ignored: 0.001 // ## flick() does not work with 0 yVelocity
property int maxFlick: 400
property bool horizontalRecursionGuard: false
property bool verticalRecursionGuard: false
horizontalMinimumValue: flickableItem ? flickableItem.originX : 0
horizontalMaximumValue: flickableItem ? flickableItem.originX + flickableItem.contentWidth - viewport.width : 0
verticalMinimumValue: flickableItem ? flickableItem.originY : 0
verticalMaximumValue: flickableItem ? flickableItem.originY + flickableItem.contentHeight - viewport.height + __viewTopMargin : 0
Connections {
target: flickableItem
onContentYChanged: {
wheelArea.verticalRecursionGuard = true
wheelArea.verticalValue = flickableItem.contentY
wheelArea.verticalRecursionGuard = false
}
onContentXChanged: {
wheelArea.horizontalRecursionGuard = true
wheelArea.horizontalValue = flickableItem.contentX
wheelArea.horizontalRecursionGuard = false
}
}
onVerticalValueChanged: {
if (!verticalRecursionGuard) {
if (flickableItem.contentY < flickThreshold && verticalDelta > speedThreshold) {
flickableItem.flick(ignored, Math.min(maxFlick, acceleration * verticalDelta))
} else if (flickableItem.contentY > flickableItem.contentHeight
- flickThreshold - viewport.height && verticalDelta < -speedThreshold) {
flickableItem.flick(ignored, Math.max(-maxFlick, acceleration * verticalDelta))
} else {
flickableItem.contentY = verticalValue
}
}
}
onHorizontalValueChanged: {
if (!horizontalRecursionGuard)
flickableItem.contentX = horizontalValue
}
}
ScrollViewHelper {
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id: scroller
anchors.fill: parent
property bool outerFrame: !frameVisible || !(__style ? __style.__externalScrollBars : 0)
property int scrollBarSpacing: outerFrame ? 0 : (__style ? __style.__scrollBarSpacing : 0)
property int verticalScrollbarOffset: verticalScrollBar.visible && !verticalScrollBar.isTransient ?
verticalScrollBar.width + scrollBarSpacing : 0
property int horizontalScrollbarOffset: horizontalScrollBar.visible && !horizontalScrollBar.isTransient ?
horizontalScrollBar.height + scrollBarSpacing : 0
Loader {
id: frameLoader
sourceComponent: __style ? __style.frame : null
anchors.fill: parent
anchors.rightMargin: scroller.outerFrame ? 0 : scroller.verticalScrollbarOffset
anchors.bottomMargin: scroller.outerFrame ? 0 : scroller.horizontalScrollbarOffset
}
Item {
id: viewportItem
anchors.fill: frameLoader
anchors.topMargin: frameVisible ? __style.padding.top : 0
anchors.leftMargin: frameVisible ? __style.padding.left : 0
anchors.rightMargin: (frameVisible ? __style.padding.right : 0) + (scroller.outerFrame ? scroller.verticalScrollbarOffset : 0)
anchors.bottomMargin: (frameVisible ? __style.padding.bottom : 0) + (scroller.outerFrame ? scroller.horizontalScrollbarOffset : 0)
clip: true
}
}
FocusFrame { visible: highlightOnFocus && root.activeFocus }
}
}