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websocket-canvas
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Send paths to server

This commit is contained in:
Robin Steinberg 2021-08-24 22:26:23 +02:00
parent ee17944737
commit 67ce474070
1 changed files with 15 additions and 6 deletions
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21
ts/app.ts
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@ -2,6 +2,7 @@ class CanvasController {
private canvas: HTMLCanvasElement;
private canvasDiv: HTMLDivElement;
private ctx: CanvasRenderingContext2D | null;
private ws: WebSocket;
private isMouseDown: boolean = false;
private x: number = 0;
@ -11,18 +12,21 @@ class CanvasController {
private currentPath: Coordinates[] = [];
constructor() {
this.canvas = document.createElement("canvas");
this.canvasDiv = document.querySelector("#canvas") as HTMLDivElement;
this.canvas = document.createElement('canvas');
this.canvasDiv = document.querySelector('#canvas') as HTMLDivElement;
this.canvasDiv.appendChild(this.canvas);
this.canvas.width = this.canvas.offsetWidth;
this.canvas.height = this.canvas.offsetHeight;
this.ctx = this.canvas.getContext("2d");
this.ctx = this.canvas.getContext('2d');
// Events
this.canvasDiv.addEventListener("mousedown", e => this.onMouseDown(e));
this.canvasDiv.addEventListener("mouseup", () => this.onMouseUp());
this.canvasDiv.addEventListener("mousemove", e => this.onMouseMove(e));
this.canvasDiv.addEventListener('mousedown', e => this.onMouseDown(e));
this.canvasDiv.addEventListener('mouseup', () => this.onMouseUp());
this.canvasDiv.addEventListener('mousemove', e => this.onMouseMove(e));
this.ws = new WebSocket('ws://localhost:8081', 'json');
this.ws.onopen = () => this.ws.send("SENDER");
}
onMouseDown(event: MouseEvent) {
@ -36,6 +40,7 @@ class CanvasController {
this.isMouseDown = false;
this.ctx?.closePath();
this.paths.push(this.currentPath);
this.sendPath();
}
onMouseMove(event: MouseEvent) {
@ -54,6 +59,10 @@ class CanvasController {
this.x = event.clientX;
this.y = event.clientY;
}
sendPath() {
this.ws.send(JSON.stringify(this.currentPath));
}
}