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drag support in draw, new fileformat to support this

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This commit is contained in:
Ruben van de Ven 2021-12-21 13:14:32 +01:00
parent 9be9f11ba2
commit a9c71ac940
2 changed files with 145 additions and 87 deletions
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75
webserver.py
View file

@ -54,10 +54,9 @@ class WebSocketHandler(tornado.websocket.WebSocketHandler):
# the client connected
def open(self, p = None):
self.__class__.connections.add(self)
self.strokes = []
self.prefix = datetime.datetime.now().strftime('%Y-%m-%d-')
self.filename = self.prefix + str(self.check_filenr()) + '-' + uuid.uuid4().hex[:6]
print(self.filename)
logger.info(f"{self.filename=}")
self.write_message(json.dumps({
"filename": self.filename
}))
@ -66,6 +65,18 @@ class WebSocketHandler(tornado.websocket.WebSocketHandler):
files = glob.glob(os.path.join(self.config.storage, self.prefix +'*'))
return len(files) + 1
def appendEvent(self, row):
# write to an appendable json format. So basically a file that should be wrapped in [] to be json-parsable
with open(os.path.join(self.config.storage,self.filename +'.json_appendable'), 'a') as fp:
if not self.hasWritten:
#metadata to first row, but only on demand
fp.write(json.dumps([datetime.datetime.now().strftime("%Y-%m-%d %T"), self.dimensions[0], self.dimensions[1]]))
# writer.writerow()
self.hasWritten = True
fp.write(',\n')
# first column is color, rest is points
fp.write(json.dumps(row))
# the client sent the message
def on_message(self, message):
@ -73,26 +84,15 @@ class WebSocketHandler(tornado.websocket.WebSocketHandler):
try:
msg = json.loads(message)
if msg['action'] == 'stroke':
print('stroke!')
self.strokes.append([msg['color'], msg['points']])
with open(os.path.join(self.config.storage,self.filename +'.csv'), 'a') as fp:
writer = csv.writer(fp, delimiter=';')
if not self.hasWritten:
#metadata to first row, but only on demand
writer.writerow([datetime.datetime.now().strftime("%Y-%m-%d %T"), self.dimensions[0], self.dimensions[1]])
self.hasWritten = True
# first column is color, rest is points
writer.writerow([msg['color']] +[coordinate for point in msg['points'] for coordinate in point[:4]])
elif msg['action'] == 'dimensions':
if msg['event'] == 'stroke':
logger.info('stroke')
self.appendEvent(msg)
elif msg['event'] == 'dimensions':
self.dimensions = [int(msg['width']), int(msg['height'])]
logger.info(f"{self.dimensions=}")
elif msg['event'] == 'viewbox':
logger.info('move or resize')
self.appendEvent(msg)
else:
# self.send({'alert': 'Unknown request: {}'.format(message)})
logger.warn('Unknown request: {}'.format(message))
@ -143,31 +143,34 @@ class AnimationHandler(tornado.web.RequestHandler):
self.set_header("Content-Type", "application/json")
# filename = self.get_argument("file", None)
if filename == '':
names = sorted([f"/files/{name[:-4]}" for name in os.listdir(self.config.storage) if name not in ['.gitignore']])
names = sorted([f"/files/{name[:-16]}" for name in os.listdir(self.config.storage) if name.endswith('json_appendable')])
self.write(json.dumps(names))
else:
path = os.path.join(self.config.storage,os.path.basename(filename)+".csv")
path = os.path.join(self.config.storage,os.path.basename(filename)+".json_appendable")
drawing = {
"file": filename,
"shape": []
}
with open(path, 'r') as fp:
strokes = csv.reader(fp,delimiter=';')
for i, stroke in enumerate(strokes):
events = json.loads('['+fp.read()+']')
# events = csv.reader(fp,delimiter=';')
for i, event in enumerate(events):
if i == 0:
# metadata on first line
drawing['time'] = stroke[0]
drawing['dimensions'] = [stroke[1], stroke[2]]
continue
color = stroke.pop(0)
points = []
for i in range(int(len(stroke) / 4)):
p = stroke[i*4:i*4+4]
points.append([float(p[0]), float(p[1]), int(p[2]), float(p[3])])
drawing['shape'].append({
'color': color,
'points': points
})
drawing['time'] = event[0]
drawing['dimensions'] = [event[1], event[2]]
else:
if event['event'] == 'viewbox':
pass
if event['event'] == 'stroke':
# points = []
# for i in range(int(len(stroke) / 4)):
# p = stroke[i*4:i*4+4]
# points.append([float(p[0]), float(p[1]), int(p[2]), float(p[3])])
drawing['shape'].append({
'color': event['color'],
'points': event['points']
})
self.write(json.dumps(drawing))
def strokes2D(strokes):

155
www/draw.js
View file

@ -1,7 +1,10 @@
class Canvas {
constructor(wrapperEl) {
this.allowDrawing = false;
this.viewbox = { "x": 0, "y": 0, "width": null, "height": null };
this.url = window.location.origin.replace('http', 'ws') + '/ws?' + window.location.search.substring(1);
// build the interface
this.wrapperEl = wrapperEl;
this.wrapperEl.classList.add('closed');
@ -25,15 +28,38 @@ class Canvas {
this.paths = [];
this.viewboxes = [];
this.events = []; // all paths & viewboxes events
this.isDrawing = false;
this.hasMouseDown = false;
this.currentStrokeEl = null;
this.startTime = null;
document.body.addEventListener('pointermove', this.draw.bind(this));
document.body.addEventListener('pointerup', this.penup.bind(this));
this.svgEl.addEventListener('pointerdown', this.startStroke.bind(this));
this.isMoving = false;
document.body.addEventListener('pointermove', (ev) => {
if (ev.pointerType == "touch" || ev.buttons & 4) { // 4: middle mouse button
this.moveCanvas(ev);
} else { // pointerType == pen or mouse
this.draw(ev);
}
});
document.body.addEventListener('pointerup', (ev) => {
if (ev.pointerType == "touch" || ev.buttons & 4 || this.isMoving) { // buttons is 0 on pointerup
this.endMoveCanvas(ev);
this.isMoving = false;
} else { // pointerType == pen or mouse
this.penup(ev);
}
});
this.svgEl.addEventListener('pointerdown', (ev) => {
if (ev.pointerType == "touch" || ev.buttons & 4) { // 4: middle mouse button
this.isMoving = true;
this.startMoveCanvas(ev);
} else { // pointerType == pen or mouse
this.startStroke(ev);
}
});
this.createToolbox();
@ -42,12 +68,13 @@ class Canvas {
this.socket = new WebSocket(this.url);
this.socket.addEventListener('open', (e) => {
this.socket.send(JSON.stringify({
'action': 'dimensions',
'width': this.width,
'height': this.height
}));
const d = {
'event': 'dimensions',
'width': this.viewbox.width,
'height': this.viewbox.height
};
console.log('send', d);
this.socket.send(JSON.stringify(d));
})
this.socket.addEventListener('message', (e) => {
let msg = JSON.parse(e.data);
@ -60,6 +87,40 @@ class Canvas {
});
}
startMoveCanvas(ev) {
this.moveCanvasPrevPoint = { "x": ev.x, "y": ev.y };
this.currentMoves = [];
}
endMoveCanvas(ev) {
this.moveCanvasPrevPoint = null;
// sync viewpoints
const d = {
'event': 'viewbox',
'viewboxes': this.currentMoves
};
console.log('send', d);
this.socket.send(JSON.stringify(d));
}
moveCanvas(ev) {
if (this.moveCanvasPrevPoint === null) {
return
}
const diff = {
"x": ev.x - this.moveCanvasPrevPoint.x,
"y": ev.y - this.moveCanvasPrevPoint.y,
}
this.viewbox.x -= diff.x;
this.viewbox.y -= diff.y;
this.moveCanvasPrevPoint = { "x": ev.x, "y": ev.y };
this.currentMoves.push(Object.assign({'t': window.performance.now() - this.startTime}, this.viewbox));
this.applyViewBox()
}
openTheFloor() {
this.wrapperEl.classList.remove('closed');
}
@ -100,12 +161,27 @@ class Canvas {
}
resize() {
this.width = window.innerWidth;
this.height = window.innerHeight;
const viewBox = `0 0 ${this.width} ${this.height}`;
this.viewbox.width = window.innerWidth;
this.viewbox.height = window.innerHeight;
this.applyViewBox();
}
applyViewBox() {
const viewBox = `${this.viewbox.x} ${this.viewbox.y} ${this.viewbox.width} ${this.viewbox.height}`;
this.svgEl.setAttribute('viewBox', viewBox);
this.svgEl.setAttribute('width', this.width + 'mm');
this.svgEl.setAttribute('height', this.height + 'mm');
this.svgEl.setAttribute('width', this.viewbox.width + 'mm');
this.svgEl.setAttribute('height', this.viewbox.height + 'mm');
// todo save drag event;
// const newViewbox = Object.assign({}, this.viewbox, {'t': window.performance.now() - this.startTime});
// const lastViewbox = this.viewboxes[this.viewboxes.length - 1];
// if(newViewbox.x == lastViewbox.x && newViewbox.y == lastViewbox.y && newViewbox.width == lastViewbox.width && newViewbox.height == lastViewbox.height){
// // do nothing, avoiding duplicate
// } else {
// this.viewboxes.push(newViewbox);
// this.events.push(newViewbox);
// }
}
requestResize() {
@ -116,8 +192,8 @@ class Canvas {
getCoordinates(e) {
// convert event coordinates into relative positions on x & y axis
let box = this.svgEl.getBoundingClientRect();
let x = (e.x - box['left']) / box['width'];
let y = (e.y - box['top']) / box['height'];
let x = (e.x - box['left'] + this.viewbox.x) / box['width'];
let y = (e.y - box['top'] + this.viewbox.y) / box['height'];
return { 'x': x, 'y': y };
}
@ -125,27 +201,11 @@ class Canvas {
return !(pos['x'] < 0 || pos['y'] < 0 || pos['x'] > 1 || pos['y'] > 1);
}
// isInsideDrawingBounds (pos) {
// if(pos['x'] > xPadding && pos['x'] < (xPadding+drawWidthFactor) && pos['y'] > yPadding && pos['y'] < yPadding+drawHeightFactor) {
// return true;
// }
// return false;
// }
draw(e) {
let pos = this.getCoordinates(e);
if (this.hasMouseDown)
console.log(pos, e);
// if(!isInsideBounds(pos)) {
// // outside of bounds
// return;
// }
// if(!e.buttons || (this.isDrawing && !this.isInsideBounds(pos))){
// this.endStroke(pos);
// }
if (!this.isDrawing && this.hasMouseDown && this.isInsideBounds(pos)) {
if (!this.isDrawing && this.hasMouseDown /*&& this.isInsideBounds(pos)*/) {
this.isDrawing = true;
}
@ -154,28 +214,22 @@ class Canvas {
let d = this.strokes2D(this.paths[this.paths.length - 1].points);
this.currentStrokeEl.setAttribute('d', d);
}
//console.log([pos['x'], pos['y']], isDrawing);
// socket.send(JSON.stringify({
// 'action': 'move',
// 'direction': [pos['x'], pos['y']],
// 'mouse': isDrawing,
// }));
}
startStroke(e) {
this.hasMouseDown = true;
console.log('start');
const strokeEl = document.createElementNS('http://www.w3.org/2000/svg', 'path');
strokeEl.style.stroke = this.currentColor;
this.svgEl.appendChild(strokeEl);
this.currentStrokeEl = strokeEl;
this.paths.push({
let path = {
'el': strokeEl,
'color': this.currentColor,
'points': []
});
};
this.paths.push(path);
this.events.push(path); // same ref.
if (this.startTime === null) {
// initiate timer on first stroke
@ -184,11 +238,10 @@ class Canvas {
}
endStroke(pos) {
console.log(this.isDrawing)
if (!this.isDrawing) {
return;
}
console.log("send!")
this.isDrawing = false;
//document.body.removeEventListener('mousemove', draw);
@ -198,11 +251,13 @@ class Canvas {
this.paths[this.paths.length - 1].points[this.paths[this.paths.length - 1].points.length - 1][2] = 1;
}
const stroke = this.paths[this.paths.length - 1];
this.socket.send(JSON.stringify({
'action': 'stroke',
const d = {
'event': 'stroke',
'color': stroke.color,
'points': stroke.points
}));
};
console.log('send', d);
this.socket.send(JSON.stringify(d));
}
penup(e) {
@ -222,7 +277,7 @@ class Canvas {
let cmd = "";
for (let stroke of strokes) {
if (!last_stroke) {
d += `M${stroke[0] * this.width},${stroke[1] * this.height} `;
d += `M${stroke[0] * this.viewbox.width},${stroke[1] * this.viewbox.height} `;
cmd = 'M';
} else {
if (last_stroke[2] == 1) {
@ -233,7 +288,7 @@ class Canvas {
cmd = 'l';
}
let rel_stroke = [stroke[0] - last_stroke[0], stroke[1] - last_stroke[1]];
d += `${rel_stroke[0] * this.width},${rel_stroke[1] * this.height} `;
d += `${rel_stroke[0] * this.viewbox.width},${rel_stroke[1] * this.viewbox.height} `;
}
last_stroke = stroke;