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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
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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