|
|
@@ -0,0 +1,298 @@
|
|
|
+const canvas = document.getElementById('canvas')
|
|
|
+const ctx = canvas.getContext('2d')
|
|
|
+
|
|
|
+const width = canvas.width;
|
|
|
+const height = canvas.height;
|
|
|
+
|
|
|
+let current;
|
|
|
+let selection = []
|
|
|
+
|
|
|
+const tools = {
|
|
|
+ graffity: {
|
|
|
+ mousemove(e){ //e.buttons 0b00000x11 & 0b00000100 == x
|
|
|
+ (e.buttons & 1) && new Circle(e.clientX, e.clientY, +size.value, color.value)
|
|
|
+ }
|
|
|
+ },
|
|
|
+ circle: {
|
|
|
+ mousedown(e){
|
|
|
+ current = new Circle(e.clientX,e.clientY, 1, color.value)
|
|
|
+ },
|
|
|
+ mousemove(e){
|
|
|
+ if (!current) return;
|
|
|
+
|
|
|
+ current.radius = current.distanceTo(e.clientX, e.clientY)
|
|
|
+ Drawable.drawAll()
|
|
|
+ },
|
|
|
+
|
|
|
+ mouseup(e){
|
|
|
+ current = null
|
|
|
+ }
|
|
|
+ },
|
|
|
+ elipse: {
|
|
|
+ mousedown(e){
|
|
|
+ current = new Elipse(e.clientX,e.clientY, 1,1, color.value)
|
|
|
+ },
|
|
|
+ mousemove(e){
|
|
|
+ if (!current) return;
|
|
|
+ var width = e.clientX - current.x;
|
|
|
+ var height = e.clientY - current.y;
|
|
|
+ current.width = width ? width : width * -1;
|
|
|
+ current.height = height ? height : height * -1;
|
|
|
+ Drawable.drawAll()
|
|
|
+ },
|
|
|
+
|
|
|
+ mouseup(e){
|
|
|
+ current = null
|
|
|
+ }
|
|
|
+ },
|
|
|
+ line: {
|
|
|
+ mousedown(e){
|
|
|
+ current = new Line(e.clientX, e.clientY, 0, 0, color.value, +size.value)
|
|
|
+ },
|
|
|
+ mousemove(e){
|
|
|
+ if (!current) return;
|
|
|
+
|
|
|
+ current.width = e.clientX - current.x
|
|
|
+ current.height = e.clientY - current.y
|
|
|
+
|
|
|
+ Drawable.drawAll()
|
|
|
+ },
|
|
|
+
|
|
|
+ mouseup(e){
|
|
|
+ current = null
|
|
|
+ }
|
|
|
+ },
|
|
|
+ rectangle : {
|
|
|
+ mousedown(e){
|
|
|
+ current = new Rectangle(e.clientX, e.clientY, 0, 0, color.value, +size.value)
|
|
|
+ },
|
|
|
+ mousemove(e){
|
|
|
+ if (!current) return;
|
|
|
+
|
|
|
+ current.width = e.clientX - current.x
|
|
|
+ current.height = e.clientY - current.y
|
|
|
+
|
|
|
+ Drawable.drawAll()
|
|
|
+ },
|
|
|
+
|
|
|
+ mouseup(e){
|
|
|
+ current = null
|
|
|
+ }
|
|
|
+ },
|
|
|
+ select: {
|
|
|
+ click(e){
|
|
|
+ console.log(e)
|
|
|
+ let found = Drawable.instances.filter(c => c.in && c.in(e.clientX, e.clientY))
|
|
|
+ if (found.length){
|
|
|
+ if (e.ctrlKey){
|
|
|
+ selection.push(found.pop())
|
|
|
+ }
|
|
|
+ else {
|
|
|
+ selection = [found.pop()]
|
|
|
+ }
|
|
|
+ }
|
|
|
+ else {
|
|
|
+ if (!e.ctrlKey) selection = []
|
|
|
+ }
|
|
|
+
|
|
|
+ Drawable.drawAll(selection)
|
|
|
+ },
|
|
|
+ mousedown(e){
|
|
|
+ //
|
|
|
+ },
|
|
|
+ mousemove(e){
|
|
|
+
|
|
|
+ },
|
|
|
+
|
|
|
+ mouseup(e){
|
|
|
+ //x,y, w, h прямоугольника
|
|
|
+ //selection - только те элеменеты Drawable.instances которые в границах прямоугольника.
|
|
|
+ },
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+
|
|
|
+
|
|
|
+function superHandler(evt){
|
|
|
+ let t = tools[tool.value]
|
|
|
+ if (typeof t[evt.type] === 'function')
|
|
|
+ t[evt.type].call(this, evt)
|
|
|
+}
|
|
|
+
|
|
|
+canvas.onmousemove = superHandler
|
|
|
+canvas.onmouseup = superHandler
|
|
|
+canvas.onmousedown = superHandler
|
|
|
+canvas.onclick = superHandler
|
|
|
+
|
|
|
+////
|
|
|
+
|
|
|
+
|
|
|
+function Drawable(){
|
|
|
+ Drawable.addInstance(this);
|
|
|
+}
|
|
|
+
|
|
|
+const distance = (x1,y1, x2, y2) => ((x1-x2)**2 + (y1-y2)**2)**0.5
|
|
|
+
|
|
|
+Drawable.prototype.draw = function(){};
|
|
|
+Drawable.prototype.distanceTo = function(x,y){
|
|
|
+ if (typeof this.x !== 'number' ||
|
|
|
+ typeof this.y !== 'number'){
|
|
|
+ return NaN
|
|
|
+ }
|
|
|
+ return distance(this.x, this.y, x, y)
|
|
|
+};
|
|
|
+Drawable.instances = [];
|
|
|
+Drawable.addInstance = function(item){
|
|
|
+ Drawable.instances.push(item);
|
|
|
+}
|
|
|
+
|
|
|
+Drawable.drawAll = function(selection=[]){
|
|
|
+ ctx.clearRect(0,0,width,height);
|
|
|
+ Drawable.forAll(item => item.draw())
|
|
|
+ selection.forEach(item => item.draw(true))
|
|
|
+}
|
|
|
+
|
|
|
+Drawable.forAll = function(callback){
|
|
|
+ for(var i = 0; i<Drawable.instances.length;i++){
|
|
|
+ callback(Drawable.instances[i])
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+class Circle extends Drawable {
|
|
|
+ constructor(x,y,radius, color){
|
|
|
+ super()
|
|
|
+ this.x = x;
|
|
|
+ this.y = y;
|
|
|
+ this.radius = radius;
|
|
|
+ this.color = color;
|
|
|
+
|
|
|
+ this.draw();
|
|
|
+ }
|
|
|
+
|
|
|
+ draw(selected){
|
|
|
+ ctx.beginPath();
|
|
|
+ ctx.arc(this.x, this.y, this.radius, 0, 2 * Math.PI);
|
|
|
+ ctx.closePath();
|
|
|
+ ctx.fillStyle = this.color;
|
|
|
+ if (selected){
|
|
|
+ ctx.lineWidth = 2
|
|
|
+ ctx.stroke();
|
|
|
+ }
|
|
|
+ ctx.fill();
|
|
|
+ }
|
|
|
+
|
|
|
+ in(x,y){
|
|
|
+ return this.distanceTo(x,y) < this.radius
|
|
|
+ }
|
|
|
+
|
|
|
+ inBounds(x,y,w,h){ // x = 100, this.x = 102, w = 5
|
|
|
+ return this.x >= x && this.x <= x + w &&
|
|
|
+ this.y >= y && this.y <= y + h
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+class Elipse extends Drawable {
|
|
|
+ constructor(x,y,width,height,color){
|
|
|
+ super()
|
|
|
+ this.x = x ? x : x*-1;
|
|
|
+ this.y = y ? y : y*-1;
|
|
|
+ this.width = width;
|
|
|
+ this.height = height;
|
|
|
+ this.color = color;
|
|
|
+
|
|
|
+ this.draw();
|
|
|
+ }
|
|
|
+
|
|
|
+ draw(){
|
|
|
+ this.width = this.width > 0 ? this.width : this.width * (-1);
|
|
|
+ this.height = this.height > 0 ? this.height : this.height * (-1);
|
|
|
+ ctx.beginPath();
|
|
|
+ ctx.moveTo(this.x, this.y);
|
|
|
+ ctx.ellipse(this.x, this.y, this.height, this.width, Math.PI / 2, 0, 2 * Math.PI);
|
|
|
+ ctx.closePath();
|
|
|
+ ctx.fillStyle = this.color;
|
|
|
+ ctx.fill();
|
|
|
+ }
|
|
|
+
|
|
|
+ in(x,y){
|
|
|
+ return this.distanceTo(x,y) < this.radius
|
|
|
+ }
|
|
|
+
|
|
|
+ inBounds(x,y,w,h){ // x = 100, this.x = 102, w = 5
|
|
|
+ return this.x >= x && this.x <= x + w &&
|
|
|
+ this.y >= y && this.y <= y + h
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+
|
|
|
+
|
|
|
+
|
|
|
+class Line extends Drawable {
|
|
|
+ constructor(x,y, width, height, color, lineWidth){
|
|
|
+ super()
|
|
|
+ this.x = x;
|
|
|
+ this.y = y;
|
|
|
+ this.width = width;
|
|
|
+ this.height = height;
|
|
|
+ this.color = color;
|
|
|
+ this.lineWidth = lineWidth;
|
|
|
+
|
|
|
+ this.draw();
|
|
|
+ }
|
|
|
+
|
|
|
+
|
|
|
+ draw(){
|
|
|
+ ctx.beginPath();
|
|
|
+ ctx.moveTo(this.x, this.y);
|
|
|
+ ctx.lineTo(this.x + this.width, this.y + this.height);
|
|
|
+ ctx.closePath();
|
|
|
+ ctx.strokeStyle = this.color;
|
|
|
+ ctx.lineWidth = this.lineWidth
|
|
|
+ ctx.stroke();
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+class Rectangle extends Drawable {
|
|
|
+ constructor(x,y, width, height, color, lineWidth){
|
|
|
+ super()
|
|
|
+ this.x = x;
|
|
|
+ this.y = y;
|
|
|
+ this.width = width;
|
|
|
+ this.height = height;
|
|
|
+ this.color = color;
|
|
|
+ this.lineWidth = lineWidth;
|
|
|
+ this.draw();
|
|
|
+ }
|
|
|
+
|
|
|
+
|
|
|
+ draw(){
|
|
|
+ ctx.beginPath();
|
|
|
+ ctx.rect(this.x , this.y ,this.width,this.height);
|
|
|
+ ctx.fillStyle = this.color;
|
|
|
+ ctx.fill();
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+color.onchange = () => {
|
|
|
+ selection.forEach(c => c.color = color.value)
|
|
|
+ Drawable.drawAll(selection)
|
|
|
+}
|
|
|
+
|
|
|
+document.getElementById('delete').onclick = () =>{
|
|
|
+ Drawable.instances = Drawable.instances.filter(item => !selection.includes(item))
|
|
|
+ selection = []
|
|
|
+ Drawable.drawAll()
|
|
|
+}
|
|
|
+
|
|
|
+
|
|
|
+//new Line(0,0,100,100, "red")
|
|
|
+////new Circle(30,30,10, "red")
|
|
|
+
|
|
|
+////canvas.onmousemove = function(e){
|
|
|
+////}
|
|
|
+
|
|
|
+undo.onclick = function(){
|
|
|
+ Drawable.instances.pop()
|
|
|
+ //Drawable.instances = []
|
|
|
+ Drawable.drawAll()
|
|
|
+}
|
Vadym Hlushko