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/****************************************************************************
**
** 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 2.2
import QtQuick.Controls 1.1
Item {
id: content
property Component menuItemDelegate
property Component scrollIndicatorStyle
property Component scrollerStyle
property var itemsModel
property int minWidth: 100
property real maxHeight: 800
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)
readonly property int currentIndex: __menu.__currentIndex
property Item currentItem: null
property int itemHeight: 23
Component.onCompleted: {
var children = list.contentItem.children
for (var i = 0; i < list.count; i++) {
var child = children[i]
if (child.visible && child.styleData.type === MenuItemType.Item) {
itemHeight = children[i].height
break
}
}
}
readonly property int fittingItems: Math.floor((maxHeight - downScroller.height) / itemHeight)
readonly property real fittedMaxHeight: itemHeight * fittingItems + downScroller.height
readonly property bool shouldUseScrollers: scrollView.style === emptyScrollerStyle && itemsModel.length > fittingItems
readonly property real upScrollerHeight: upScroller.visible ? upScroller.height : 0
readonly property real downScrollerHeight: downScroller.visible ? downScroller.height : 0
property var oldMousePos: undefined
property var openedSubmenu: null
function updateCurrentItem(mouse) {
var pos = mapToItem(list.contentItem, mouse.x, mouse.y)
var dx = 0
var dy = 0
var dist = 0
if (openedSubmenu && oldMousePos !== undefined) {
dx = mouse.x - oldMousePos.x
dy = mouse.y - oldMousePos.y
dist = Math.sqrt(dx * dx + dy * dy)
}
oldMousePos = mouse
if (openedSubmenu && dist > 5) {
var menuRect = __menu.__popupGeometry
var submenuRect = openedSubmenu.__popupGeometry
var angle = Math.atan2(dy, dx)
var ds = 0
if (submenuRect.x > menuRect.x) {
ds = menuRect.width - oldMousePos.x
} else {
angle = Math.PI - angle
ds = oldMousePos.x
}
var above = submenuRect.y - menuRect.y - oldMousePos.y
var below = submenuRect.height - above
var minAngle = Math.atan2(above, ds)
var maxAngle = Math.atan2(below, ds)
// This tests that the current mouse position is in
// the triangle defined by the previous mouse position
// and the submenu's top-left and bottom-left corners.
if (minAngle < angle && angle < maxAngle) {
sloppyTimer.start()
return
}
}
if (!currentItem || !currentItem.contains(Qt.point(pos.x - currentItem.x, pos.y - currentItem.y))) {
if (currentItem && !hoverArea.pressed
&& currentItem.styleData.type === MenuItemType.Menu) {
currentItem.__closeSubMenu()
openedSubmenu = null
}
currentItem = list.itemAt(pos.x, pos.y)
if (currentItem) {
__menu.__currentIndex = currentItem.__menuItemIndex
if (currentItem.styleData.type === MenuItemType.Menu
&& !currentItem.__menuItem.__popupVisible) {
currentItem.__showSubMenu(false)
openedSubmenu = currentItem.__menuItem
}
} else {
__menu.__currentIndex = -1
}
}
}
Timer {
id: sloppyTimer
interval: 1000
// Stop timer as soon as we hover one of the submenu items
property int currentIndex: openedSubmenu ? openedSubmenu.__currentIndex : -1
onCurrentIndexChanged: if (currentIndex !== -1) stop()
onTriggered: {
if (openedSubmenu && openedSubmenu.__currentIndex === -1)
updateCurrentItem(oldMousePos)
}
}
Component {
id: emptyScrollerStyle
Style {
padding { left: 0; right: 0; top: 0; bottom: 0 }
property bool scrollToClickedPosition: false
property Component frame: Item { visible: false }
property Component corner: Item { visible: false }
property Component __scrollbar: Item { visible: false }
}
}
ScrollView {
id: scrollView
anchors {
fill: parent
topMargin: upScrollerHeight
bottomMargin: downScrollerHeight
}
style: scrollerStyle || emptyScrollerStyle
__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({ "x": mouse.x, "y": mouse.y })
onPressed: updateCurrentItem({ "x": mouse.x, "y": mouse.y })
onReleased: content.triggered(currentItem)
onExited: {
if (currentItem && !currentItem.__menuItem.__popupVisible) {
currentItem = null
__menu.__currentIndex = -1
}
}
MenuContentScroller {
id: upScroller
direction: Qt.UpArrow
visible: shouldUseScrollers && !list.atYBeginning
function scrollABit() { list.contentY -= itemHeight }
}
MenuContentScroller {
id: downScroller
direction: Qt.DownArrow
visible: shouldUseScrollers && !list.atYEnd
function scrollABit() { list.contentY += itemHeight }
}
}
Timer {
interval: 1
running: true
repeat: false
onTriggered: list.positionViewAtIndex(currentIndex, !scrollView.__style
? ListView.Center : ListView.Beginning)
}
Binding {
target: scrollView.__verticalScrollBar
property: "singleStep"
value: itemHeight
}
}
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