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index - working simple konva brush important3.html
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<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>HammerJS Pinch Zoom and Drag</title>
<style type="text/css">
#dragWrapper::-webkit-scrollbar {
display: none;
}
*::-webkit-scrollbar {
display: none;
}
body {
margin: 0;
padding: 0;
text-align: center;
/* background-color: red */
}
#dragWrapper {
width: 100%;
box-sizing: border-box;
height: 100vh;
/* height: calc(var(--vh, 1vh) * 100); */
background-color: #91b376;
}
#drag {
display: none;
touch-action: auto;
height: auto;
width: 100%;
position: absolute;
left: 0;
transition-timing-function: ease-out;
opacity: .2
}
#container {
position: absolute;
top: 0;
}
/* #toolbar {
height: 56px;
width: 100%;
} */
</style>
</head>
<body>
<!-- <div id="toolbar"></div> -->
<div id="dragWrapper">
<img id="drag" src="./superCompact.jpg" alt="">
<div id="container"></div>
</div>
<script type="text/javascript" src="./js/hammer.js"></script>
<script type="text/javascript" src="./js/konva.min.js"></script>
<script type="text/javascript">
// const shortAxis = gettAxis().short
// const longAxis = gettAxis().long
//konva begins here
// first we need Konva core things: stage and layer
var stage = new Konva.Stage({
container: 'container',
width: 1,
height: 1
});
var layer = new Konva.Layer();
stage.add(layer);
//add image
var imageObj = new Image();
var frog;
imageObj.onload = function() {
frog = new Konva.Image({
x: 0,
y: 0,
image: imageObj,
width: 0,
height: 0,
});
// add the shape to the layer
layer.add(frog);
layer.batchDraw();
//rest of konva
var canvas = document.createElement('canvas');
canvas.width = stage.width();
canvas.height = stage.height();
// created canvas we can add to layer as "Konva.Image" element
var image = new Konva.Image({
image: canvas,
x: 0,
y: 0
});
layer.add(image);
stage.draw();
// Good. Now we need to get access to context element
var context = canvas.getContext('2d');
context.strokeStyle = '#df4b26';
context.lineJoin = 'round';
context.lineWidth = 5;
var isPaint = false;
var lastPointerPosition;
var mode = 'brush';
// now we need to bind some events
// we need to start drawing on mousedown
// and stop drawing on mouseup
image.on('mousedown touchstart', function() {
console.log('sss')
isPaint = true;
lastPointerPosition = stage.getPointerPosition();
context.beginPath();
});
// will it be better to listen move/end events on the window?
stage.on('mouseup touchend', function() {
isPaint = false;
context.moveTo(lastPointerPosition.x - image.x(), lastPointerPosition.y - image.y());
context.lineTo(lastPointerPosition.x - image.x(), lastPointerPosition.y - image.y());
context.closePath();
context.stroke();
layer.batchDraw();
});
// and core function - drawing
stage.on('mousemove touchmove', function() {
if (!isPaint) {
return;
}
if (mode === 'brush') {
context.globalCompositeOperation = 'source-over';
}
if (mode === 'eraser') {
context.globalCompositeOperation = 'destination-out';
}
context.beginPath();
var localPos = {
x: lastPointerPosition.x - image.x(),
y: lastPointerPosition.y - image.y()
};
context.moveTo(localPos.x, localPos.y);
var pos = stage.getPointerPosition();
localPos = {
x: pos.x - image.x(),
y: pos.y - image.y()
};
context.lineTo(localPos.x, localPos.y);
context.closePath();
context.stroke();
lastPointerPosition = pos;
layer.batchDraw();
});
//rest of codes
var elementWidth;
var elementHight;
let zoomlock = false
let editLock = false
var doIt;
window.onresize = function() {
clearTimeout(doIt)
doIt = setTimeout(resizeEnd, 10)
}
function gettAxis() {
const innerWidth = window.innerWidth
const innerHeight = window.innerHeight
return innerWidth >= innerHeight ? {
short: innerHeight,
long: innerWidth
} : {
short: innerWidth,
long: innerHeight
}
}
var pinchZoomOrigin = undefined;
let needsUpdate3 = true;
var element = document.getElementById('drag')
let imageNaturalWidth = element.naturalWidth;
let imageNaturalHeight = element.naturalHeight;
var parent = document.getElementById('dragWrapper')
var canvasContainer = document.getElementById('container')
//we should use hammer on container itself
var hammertime = new Hammer.Manager(canvasContainer, {});
var pinch = new Hammer.Pinch({
enable: true,
pointers: 0,
threshold: 0
});
var pan = new Hammer.Pan({
direction: Hammer.DIRECTION_ALL,
threshold: 0
});
var tap = new Hammer.Tap({
pointers: 1,
taps: 2,
interval: 300,
time: 250,
threshold: 300,
posThreshold: 300
})
var swipe = new Hammer.Swipe({
direction: Hammer.DIRECTION_ALL,
velocity: 2,
threshold: 10,
pointers: 1
})
var portraitTransformData;
var landscapeTransformData;
// var doubletap = new Hammer.Tap({
// event: 'doubletap',
// taps: 2
// })
pinch.recognizeWith(pan)
pan.recognizeWith(pinch)
pan.recognizeWith(tap)
tap.recognizeWith(pan)
swipe.recognizeWith(pan);
// pan.recognizeWith(swipe);
hammertime.add(pinch)
hammertime.add(pan)
hammertime.add(tap)
hammertime.add(swipe)
hammertime.on('tap', function(e) {
console.log('tap occured')
})
hammertime.on('swipe', function(ev) {
console.log('swipe occured')
console.log(ev)
var direction = '';
switch (ev.direction) {
case Hammer.DIRECTION_LEFT:
direction = 'left';
break;
case Hammer.DIRECTION_RIGHT:
direction = 'right';
break;
case Hammer.DIRECTION_UP:
direction = 'up';
break;
case Hammer.DIRECTION_DOWN:
direction = 'down';
break;
}
console.log(direction)
})
var fixHammerjsDeltaIssue = undefined;
var pinchStart = {
x: undefined,
y: undefined
}
var lastEvent = undefined;
var originalSize = {
width: element.offsetWidth,
height: element.offsetHeight
}
var current = {
x: 0,
y: 0,
z: 1,
zooming: false,
width: originalSize.width * 1,
height: originalSize.height * 1,
}
var last = {
x: current.x,
y: current.y,
z: current.z
}
resizeEnd()
function resizeEnd() {
element.style.display = 'none'
needsUpdate3 = true;
pinchZoomOrigin = undefined;
parent.style.width = '100%'
parent.style.height = '100vh'
parent.style.width = window.innerWidth + 'px'
parent.style.height = window.innerHeight + 'px'
element.style.width = '100%'
element.style.height = 'auto'
element.style.left = '0'
element.style.transform = "none";
element.style.display = 'block'
elementWidth = window.getComputedStyle(element).width.replace(/px/, '');
elementHight = window.getComputedStyle(element).height.replace(/px/, '');
frog.attrs.width = elementWidth
frog.attrs.height = elementHight
console.log(canvas)
canvas.width = elementWidth
canvas.height = elementHight
//need this to get brush color back
context.strokeStyle = '#000000';
context.lineJoin = 'round';
context.lineCap = 'round';
context.lineWidth = 5;
stage.setWidth(elementWidth)
stage.setHeight(elementHight)
layer.draw()
stage.draw()
// console.log(frog)
// if (screen.orientation.angle == 0) {
// parent.style.width = shortAxis + 'px'
// parent.style.height = longAxis + 'px'
// } else {
// parent.style.width = longAxis + 'px'
// parent.style.height = shortAxis + 'px'
// }
fixHammerjsDeltaIssue = undefined;
pinchStart = {
x: undefined,
y: undefined
}
lastEvent = undefined;
originalSize = {
width: element.offsetWidth,
height: element.offsetHeight
}
current = {
x: 0,
y: 0,
z: 1,
zooming: false,
width: originalSize.width * 1,
height: originalSize.height * 1,
}
// console.log({
// current,
// parentW: parent.style.width,
// parentH: parent.style.height
// })
console.log({
currentX: current.x,
currentY: current.y,
currentZ: current.z,
elementW: element.offsetWidth,
elementH: element.offsetHeight,
elementCurrentW: current.width,
elementCurrentH: current.height,
parentW: parent.offsetWidth,
parentH: parent.offsetHeight,
windowW: window.innerWidth,
windowH: window.innerHeight
})
last = {
x: current.x,
y: current.y,
z: current.z
}
console.log(last)
if (screen.orientation.angle == 0 && portraitTransformData !== undefined) {
element.style.transform = portraitTransformData
// console.log('data restored')
//translate3d(0px, 0px, 0px) scale(1)
current.x = parseFloat(portraitTransformData.replace('translate3d(', '').replace(/px(.*?)$/, ''))
current.y = parseFloat(portraitTransformData.replace(/^(.*?)px, /, '').replace(/px(.*?)$/, ''))
current.z = parseFloat(portraitTransformData.replace(/^(.*?)scale\(/, '').replace(/\)$/, ''))
last.x = current.x
last.y = current.y
last.z = current.z
console.log(last)
} else if (screen.orientation.angle == 90 && landscapeTransformData !== undefined) {
element.style.transform = landscapeTransformData
// console.log('data restored')
current.x = parseFloat(portraitTransformData.replace('translate3d(', '').replace(/px(.*?)$/, ''))
current.y = parseFloat(portraitTransformData.replace(/^(.*?)px, /, '').replace(/px(.*?)$/, ''))
current.z = parseFloat(portraitTransformData.replace(/^(.*?)scale\(/, '').replace(/\)$/, ''))
last.x = current.x
last.y = current.y
last.z = current.z
console.log(last)
} else {
sUpdate()
}
}
function getRelativePosition(element, point, originalSize, scale) {
var domCoords = getCoords(element);
var elementX = point.x - domCoords.x;
var elementY = point.y - domCoords.y;
var relativeX = elementX / (originalSize.width * scale / 2) - 1;
var relativeY = elementY / (originalSize.height * scale / 2) - 1;
return {
x: relativeX,
y: relativeY
}
}
function getCoords(elem) { // crossbrowser version
var box = elem.getBoundingClientRect();
var body = document.body;
var docEl = document.documentElement;
var scrollTop = window.pageYOffset || docEl.scrollTop || body.scrollTop;
var scrollLeft = window.pageXOffset || docEl.scrollLeft || body.scrollLeft;
var clientTop = docEl.clientTop || body.clientTop || 0;
var clientLeft = docEl.clientLeft || body.clientLeft || 0;
var top = box.top + scrollTop - clientTop;
var left = box.left + scrollLeft - clientLeft;
return {
x: Math.round(left),
y: Math.round(top)
};
}
function scaleFrom(zoomOrigin, currentScale, newScale) {
var currentShift = getCoordinateShiftDueToScale(originalSize, currentScale);
var newShift = getCoordinateShiftDueToScale(originalSize, newScale)
var zoomDistance = newScale - currentScale
var shift = {
x: currentShift.x - newShift.x,
y: currentShift.y - newShift.y,
}
var output = {
x: zoomOrigin.x * shift.x,
y: zoomOrigin.y * shift.y,
z: zoomDistance
}
return output
}
function getCoordinateShiftDueToScale(size, scale) {
var newWidth = scale * size.width;
var newHeight = scale * size.height;
var dx = (newWidth - size.width) / 2
var dy = (newHeight - size.height) / 2
return {
x: dx,
y: dy
}
}
// hammertime.on('doubletap', function(e) {
// var scaleFactor = 1.7;
// if (current.zooming === false) {
// current.zooming = true;
// } else {
// current.zooming = false;
// scaleFactor = -scaleFactor;
// }
// element.style.transition = "0.3s";
// setTimeout(function() {
// element.style.transition = "none";
// }, 300)
// var zoomOrigin = getRelativePosition(element, {
// x: e.center.x,
// y: e.center.y
// }, originalSize, current.z);
// var d = scaleFrom(zoomOrigin, current.z, current.z + scaleFactor)
// current.x += d.x;
// current.y += d.y;
// current.z += d.z;
// last.x = current.x;
// last.y = current.y;
// last.z = current.z;
// needsUpdate3 = true
// console.log('doubleTap occured')
// update();
// })
hammertime.on('pan', function(e) {
let fingerCount = e.maxPointers
let customFingers;
if (editLock) {
customFingers = 0
} else {
customFingers = 1
}
if (fingerCount > customFingers) {
if (lastEvent !== 'pan') {
fixHammerjsDeltaIssue = {
x: e.deltaX,
y: e.deltaY
}
}
current.x = last.x + e.deltaX - fixHammerjsDeltaIssue.x;
current.y = last.y + e.deltaY - fixHammerjsDeltaIssue.y;
lastEvent = 'pan';
// console.log('pan occured')
update();
}
})
hammertime.on('pinch', function(e) {
let customScale;
if (zoomlock) {
customScale = 1
} else {
customScale = e.scale
}
var d = scaleFrom(pinchZoomOrigin, last.z, last.z * customScale)
current.x = d.x + last.x + e.deltaX;
current.y = d.y + last.y + e.deltaY;
current.z = d.z + last.z;
lastEvent = 'pinch';
// console.log('pinch occured')
console.log(d.z)
console.log(e.scale)
console.log(customScale)
update();
})
hammertime.on('pinchstart', function(e) {
pinchStart.x = e.center.x;
pinchStart.y = e.center.y;
pinchZoomOrigin = getRelativePosition(element, {
x: pinchStart.x,
y: pinchStart.y
}, originalSize, current.z);
lastEvent = 'pinchstart';
// console.log('pinchstart occured')
})
hammertime.on('panend', function(e) {
let fingerCount = e.maxPointers
let customFingers;
if (editLock) {
customFingers = 0
} else {
customFingers = 1
}
if (fingerCount > customFingers) {
last.x = current.x;
last.y = current.y;
lastEvent = 'panend';
needsUpdate3 = true;
// console.log('panend occured')
update()
}
})
hammertime.on('pinchend', function(e) {
last.x = current.x;
last.y = current.y;
last.z = current.z;
lastEvent = 'pinchend';
needsUpdate3 = true
// console.log('pinchend occured')
//i added this update there was not any update here
update()
})
function update() {
if (current.z < 1) {
current.z = 1;
last.z = current.z;
}
current.height = originalSize.height * current.z;
current.width = originalSize.width * current.z;
element.style.transition = "none";
element.style.transform = "translate3d(" + current.x + "px, " + current.y + "px, 0) scale(" + current.z + ")";
// console.log(current.y)
// console.log('update1 occured')
if (screen.orientation.angle == 0) {
portraitTransformData = element.style.transform
// console.log('data saved')
} else {
landscapeTransformData = element.style.transform
// console.log('data saved')
}
if (needsUpdate3) {
update3()
}
}
function update3() {
// console.log('update3')
current.height = originalSize.height * current.z;
current.width = originalSize.width * current.z;
parentWidth = parent.offsetWidth;
parentHeight = parent.offsetHeight;
if (current.x - (current.width - originalSize.width) / 2 > 0) {
current.x = (current.width - originalSize.width) / 2
last.x = current.x;
}
if (current.y - (current.height - originalSize.height) / 2 > 0) {
current.y = (current.height - originalSize.height) / 2
last.y = current.y;
}
// console.log({
// parentWidth,
// parentHeight,
// currentHeight: current.height,
// currentWidth: current.width,
// })
if (current.width >= parentWidth) {
let rightBoundFix = -(current.width - parentWidth - (current.width - originalSize.width) / 2)
if (current.x < rightBoundFix) {
current.x = rightBoundFix
last.x = current.x;
}
} else {
let rightBoundFix = -(current.width - parentWidth - (current.width - originalSize.width) / 2) - (parentWidth - current.width) / 2
current.x = rightBoundFix
last.x = current.x;
}
if (current.height >= parentHeight) {
let bottomBoundFix = -(current.height - parentHeight - (current.height - originalSize.height) / 2)
if (current.y < bottomBoundFix) {
current.y = bottomBoundFix
last.y = current.y;
}
} else {
let bottomBoundFix = -(current.height - parentHeight - (current.height - originalSize.height) / 2) - (parentHeight - current.height) / 2
current.y = bottomBoundFix
last.y = current.y;
}
// element.style.transitionDuration = 1 + 's'
element.style.transition = "0.7s";
element.style.transform = "translate3d(" + current.x + "px, " + current.y + "px, 0) scale(" + current.z + ")";
// console.log('update3 occured')
last.x = current.x;
last.y = current.y;
last.z = current.z;
needsUpdate3 = false
if (screen.orientation.angle == 0) {
portraitTransformData = element.style.transform
// console.log('data saved')
} else {
landscapeTransformData = element.style.transform
// console.log('data saved')
}
}
function sUpdate() {
if (current.z < 1) {
current.z = 1;
last.z = current.z;
}
current.height = originalSize.height * current.z;
current.width = originalSize.width * current.z;
element.style.transition = "none";
element.style.transform = "translate3d(" + current.x + "px, " + current.y + "px, 0) scale(" + current.z + ")";
// console.log(current.y)
console.log('sUpdate1 occured')
console.log({
currentX: current.x,
currentY: current.y,
currentZ: current.z,
elementW: element.offsetWidth,
elementH: element.offsetHeight,
elementCurrentW: current.width,
elementCurrentH: current.height,
parentW: parent.offsetWidth,
parentH: parent.offsetHeight,
windowW: window.innerWidth,
windowH: window.innerHeight
})
if (needsUpdate3) {
sUpdate3()
}
}
function sUpdate3() {
// console.log('update3')
current.height = originalSize.height * current.z;
current.width = originalSize.width * current.z;
parentWidth = parent.offsetWidth;
parentHeight = parent.offsetHeight;
if (current.x - (current.width - originalSize.width) / 2 > 0) {
current.x = (current.width - originalSize.width) / 2
last.x = current.x;
}
if (current.y - (current.height - originalSize.height) / 2 > 0) {
current.y = (current.height - originalSize.height) / 2
last.y = current.y;
}
if (current.width >= parentWidth) {
let rightBoundFix = -(current.width - parentWidth - (current.width - originalSize.width) / 2)
if (current.x < rightBoundFix) {
current.x = rightBoundFix
last.x = current.x;
}
} else {
let rightBoundFix = -(current.width - parentWidth - (current.width - originalSize.width) / 2) - (parentWidth - current.width) / 2
current.x = rightBoundFix
last.x = current.x;
}
if (current.height >= parentHeight) {
let bottomBoundFix = -(current.height - parentHeight - (current.height - originalSize.height) / 2)
if (current.y < bottomBoundFix) {
current.y = bottomBoundFix
last.y = current.y;
}
} else {
let bottomBoundFix = -(current.height - parentHeight - (current.height - originalSize.height) / 2) - (parentHeight - current.height) / 2
current.y = bottomBoundFix
last.y = current.y;
}
// element.style.transitionDuration = 1 + 's'
element.style.transition = "0.7s";
element.style.transform = "translate3d(" + current.x + "px, " + current.y + "px, 0) scale(" + current.z + ")";
console.log('sUpdate3 occured')
console.log({
currentX: current.x,
currentY: current.y,
currentZ: current.z,
elementW: element.offsetWidth,
elementH: element.offsetHeight,
elementCurrentW: current.width,
elementCurrentH: current.height,
parentW: parent.offsetWidth,
parentH: parent.offsetHeight,
windowW: window.innerWidth,
windowH: window.innerHeight
})
last.x = current.x;
last.y = current.y;
last.z = current.z;
needsUpdate3 = false
}
// then we are going to draw into special canvas element
// var select = document.getElementById('tool');
// select.addEventListener('change', function() {
// mode = select.value;
// });
};
imageObj.src = './superCompact.jpg';
//konva ends here
</script>
</body>
</html>