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/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing
**
** 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 The Qt Company Ltd 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 2.1
import QtQuick.Controls 1.1
Item {
id: content
property Component menuItemDelegate
property Component scrollerStyle
property var itemsModel
property int minWidth: 100
property real maxHeight: 800
property int margin: 1
signal triggered(var item)
function menuItemAt(index) {
list.currentIndex = index
return list.currentItem
}
width: Math.max(list.contentWidth, minWidth)
height: Math.min(list.contentHeight, fittedMaxHeight) + 2 * margin
readonly property int currentIndex: menu.__currentIndex
property Item currentItem: null
readonly property int itemHeight: (list.count > 0 && list.contentItem.children[0]) ? list.contentItem.children[0].height : 23
readonly property int fittingItems: Math.floor((maxHeight - downScroller.height) / itemHeight)
readonly property real fittedMaxHeight: itemHeight * fittingItems + downScroller.height
readonly property bool shouldUseScrollers: scrollView.__style.useScrollers && itemsModel.length > fittingItems
readonly property real upScrollerHeight: upScroller.visible ? upScroller.height : 0
readonly property real downScrollerHeight: downScroller.visible ? downScroller.height : 0
function updateCurrentItem(mouse) {
var pos = mapToItem(list.contentItem, mouse.x, mouse.y)
if (!currentItem || !currentItem.contains(Qt.point(pos.x - currentItem.x, pos.y - currentItem.y))) {
if (currentItem && !hoverArea.pressed && currentItem.isSubmenu)
currentItem.closeSubMenu()
currentItem = list.itemAt(pos.x, pos.y)
if (currentItem) {
menu.__currentIndex = currentItem.menuItemIndex
if (currentItem.isSubmenu && !currentItem.menuItem.__popupVisible)
currentItem.showSubMenu(false)
} else {
menu.__currentIndex = -1
}
}
}
ScrollView {
id: scrollView
anchors {
fill: parent
topMargin: content.margin + upScrollerHeight
bottomMargin: downScrollerHeight - content.margin - 1
rightMargin: -1
}
style: scrollerStyle
__wheelAreaScrollSpeed: itemHeight
ListView {
id: list
model: itemsModel
delegate: menuItemDelegate
snapMode: ListView.SnapToItem
boundsBehavior: Flickable.StopAtBounds
highlightFollowsCurrentItem: true
highlightMoveDuration: 0
}
}
MouseArea {
id: hoverArea
anchors.left: scrollView.left
width: scrollView.width - scrollView.__verticalScrollBar.width
height: parent.height
hoverEnabled: true
acceptedButtons: Qt.AllButtons
onPositionChanged: updateCurrentItem(mouse)
onReleased: content.triggered(currentItem)
onExited: {
if (currentItem && !currentItem.menuItem.__popupVisible) {
currentItem = null
menu.__currentIndex = -1
}
}
MenuContentScroller {
id: upScroller
direction: "up"
visible: shouldUseScrollers && !list.atYBeginning
x: margin
function scrollABit() { list.contentY -= itemHeight }
}
MenuContentScroller {
id: downScroller
direction: "down"
visible: shouldUseScrollers && !list.atYEnd
x: margin
function scrollABit() { list.contentY += itemHeight }
}
}
Timer {
interval: 1
running: true
repeat: false
onTriggered: list.positionViewAtIndex(currentIndex, scrollView.__style.useScrollers
? ListView.Center : ListView.Beginning)
}
Binding {
target: scrollView.__verticalScrollBar
property: "singleStep"
value: itemHeight
}
}
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