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import QtQuick 2.12
import "qrc:/quick/shared/" as Examples
Rectangle {
id: root
Item {
id: flickArea
anchors.fill: parent
anchors.bottomMargin: bottomFlow.implicitHeight + 4
clip: true
Flickable {
id: flick
anchors.fill: parent
anchors.margins: 6
contentWidth: text.implicitWidth
contentHeight: text.implicitHeight
pixelAligned: pxAlignCB.checked
synchronousDrag: syncDragCB.checked
Text {
id: text
text: "foo bar"
font.family: "mono"
}
onContentXChanged: canvas.requestPaint()
onContentYChanged: canvas.requestPaint()
}
Timer { id: fadeTimer; interval: 1000; onTriggered: { hfade.start(); } }
MouseArea {
id: verticalScrollArea
anchors {
right: parent.right
top: flick.top
bottom: flick.bottom
}
width: 36
onMouseYChanged: {
var contentY = Math.min(height, mouseY) / height * (flick.contentHeight - height)
flick.contentY = Math.max(0, contentY)
}
onReleased: flick.returnToBounds()
Rectangle {
anchors.right: parent.right
anchors.margins: 2
color: "darkgrey"
width: 20
radius: 2
antialiasing: true
height: flick.height * (flick.height / flick.contentHeight) - anchors.margins * 2
y: flick.contentY * (flick.height / flick.contentHeight)
Rectangle {
anchors.top: parent.top
width: parent.width
height: 6
radius: 2
color: "blue"
visible: flick.atYBeginning
}
Rectangle {
anchors.top: parent.bottom
width: parent.width
height: 6
radius: 2
color: "blue"
visible: flick.atYEnd
}
Text {
anchors.centerIn: parent
text: flick.contentY.toFixed(2)
rotation: 90
style: Text.Outline
styleColor: "white"
color: "black"
}
}
}
Rectangle {
id: horizontalScrollDecorator
anchors.bottom: flick.bottom
anchors.bottomMargin: -4
color: "darkgrey"
border.color: "black"
border.width: 1
height: 5
radius: 2
antialiasing: true
width: flick.width * (flick.width / flick.contentWidth) - (height - anchors.margins) * 2
x: flick.contentX * (flick.width / flick.contentWidth)
NumberAnimation on opacity { id: hfade; to: 0; duration: 500 }
onXChanged: { opacity = 1.0; fadeTimer.restart() }
}
Canvas {
id: canvas
anchors.fill: parent
antialiasing: true
renderTarget: Canvas.FramebufferObject
onPaint: {
var ctx = canvas.getContext('2d');
ctx.save()
ctx.clearRect(0, 0, canvas.width, canvas.height)
ctx.strokeStyle = "green"
ctx.fillStyle = "green"
ctx.lineWidth = 1
if (flick.horizontalVelocity) {
ctx.save()
ctx.beginPath()
ctx.translate((flick.horizontalVelocity < 0 ? width : 0), height / 2)
ctx.moveTo(0, 0)
var velScaled = flick.horizontalVelocity / 10
var arrowOffset = (flick.horizontalVelocity < 0 ? 10 : -10)
ctx.lineTo(velScaled, 0)
ctx.lineTo(velScaled + arrowOffset, -4)
ctx.lineTo(velScaled + arrowOffset, 4)
ctx.lineTo(velScaled, 0)
ctx.closePath()
ctx.stroke()
ctx.fill()
ctx.restore()
}
if (flick.verticalVelocity) {
ctx.save()
ctx.beginPath()
ctx.translate(width / 2, (flick.verticalVelocity < 0 ? height : 0))
ctx.moveTo(0, 0)
var velScaled = flick.verticalVelocity / 10
var arrowOffset = (flick.verticalVelocity < 0 ? 10 : -10)
ctx.lineTo(0, velScaled)
ctx.lineTo(-4, velScaled + arrowOffset)
ctx.lineTo(4, velScaled + arrowOffset)
ctx.lineTo(0, velScaled)
ctx.closePath()
ctx.stroke()
ctx.fill()
ctx.restore()
}
ctx.restore()
}
}
}
Row {
id: bottomFlow
anchors.bottom: parent.bottom
width: parent.width - 12
x: 6
spacing: 12
Item {
id: progFlickItem
width: progFlickRow.implicitWidth
height: progFlickRow.implicitHeight + 4 + flickingLabel.implicitHeight
Text { id: progLabel; text: "programmatic flick: h " + xvelSlider.value.toFixed(1) + " v " + yvelSlider.value.toFixed(1) }
Row {
id: progFlickRow
y: progLabel.height
spacing: 4
Column {
Examples.Slider {
id: xvelSlider
min: -5000
max: 5000
init: 5000
width: 250
name: "X"
minLabelWidth: 0
}
Examples.Slider {
id: yvelSlider
min: -5000
max: 5000
init: 2500
width: 250
name: "Y"
minLabelWidth: 0
}
}
Grid {
columns: 2
spacing: 2
Examples.Button {
text: "flick"
onClicked: flick.flick(xvelSlider.value, yvelSlider.value)
width: zeroButton.width
}
Examples.Button {
text: "cancel"
onClicked: flick.cancelFlick()
width: zeroButton.width
}
Examples.Button {
id: zeroButton
text: "<- zero"
onClicked: {
xvelSlider.setValue(5000)
yvelSlider.setValue(5000)
}
}
Examples.Button {
text: "home"
width: zeroButton.width
onClicked: {
flick.contentX = 0
flick.contentY = 0
}
}
}
}
}
Column {
height: parent.height
width: movingLabel.implicitWidth * 1.5
spacing: 2
Text {
id: movingLabel
text: "moving:"
color: flick.moving ? "green" : "black"
}
Rectangle {
width: parent.width
height: hVelLabel.implicitHeight + 4
color: flick.movingHorizontally ? "green" : "darkgrey"
Text {
id: hVelLabel
anchors.centerIn: parent
color: "white"
text: "h " + flick.horizontalVelocity.toFixed(2)
}
}
Rectangle {
width: parent.width
height: vVelLabel.implicitHeight + 4
color: flick.movingVertically ? "green" : "darkgrey"
Text {
id: vVelLabel
anchors.centerIn: parent
color: "white"
text: "v " + flick.verticalVelocity.toFixed(2)
}
}
}
Column {
height: parent.height
width: draggingLabel.implicitWidth
spacing: 2
Text {
id: draggingLabel
text: "dragging:"
color: flick.dragging ? "green" : "black"
}
Rectangle {
width: draggingLabel.implicitWidth
height: hVelLabel.implicitHeight + 4
color: flick.draggingHorizontally ? "green" : "darkgrey"
Text {
anchors.centerIn: parent
color: "white"
text: "h"
}
}
Rectangle {
width: draggingLabel.implicitWidth
height: vVelLabel.implicitHeight + 4
color: flick.draggingVertically ? "green" : "darkgrey"
Text {
anchors.centerIn: parent
color: "white"
text: "v"
}
}
}
Column {
height: parent.height
width: flickingLabel.implicitWidth
spacing: 2
Text {
id: flickingLabel
text: "flicking:"
color: flick.flicking ? "green" : "black"
}
Rectangle {
width: flickingLabel.implicitWidth
height: hVelLabel.implicitHeight + 4
color: flick.flickingHorizontally ? "green" : "darkgrey"
Text {
anchors.centerIn: parent
color: "white"
text: "h"
}
}
Rectangle {
width: flickingLabel.implicitWidth
height: vVelLabel.implicitHeight + 4
color: flick.flickingVertically ? "green" : "darkgrey"
Text {
anchors.centerIn: parent
color: "white"
text: "v"
}
}
}
Column {
spacing: 2
Examples.CheckBox {
id: pxAlignCB
text: "pixel aligned"
}
Examples.CheckBox {
id: syncDragCB
text: "synchronous drag"
}
Text {
text: "content X " + flick.contentX.toFixed(2) + " Y " + flick.contentY.toFixed(2)
}
}
}
Component.onCompleted: {
var request = new XMLHttpRequest()
request.open('GET', 'qrc:/flicktext.qml')
request.onreadystatechange = function(event) {
if (request.readyState === XMLHttpRequest.DONE)
text.text = request.responseText
}
request.send()
}
}