131 lines
4.4 KiB
JavaScript
131 lines
4.4 KiB
JavaScript
var DiagramNode = /** @class */ (function () {
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function DiagramNode(x, y, width, height, label) {
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this.x = x;
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this.y = y;
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this.width = width;
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this.height = height;
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this.label = label;
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}
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DiagramNode.prototype.pointInDiagram = function (x, y) {
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if (x < this.x) {
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return false;
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}
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if (y < this.y) {
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return false;
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}
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if (x > this.x + this.width) {
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return false;
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}
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if (y > this.y + this.height) {
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return false;
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}
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return true;
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};
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return DiagramNode;
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}());
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var _diagram;
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function diargramOnResize() {
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_diagram.fillParent();
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}
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function diagramOnMouseDown(ev) {
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_diagram.onmousedown(ev);
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}
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function diagramOnMouseUp(ev) {
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_diagram.onmouseup(ev);
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}
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function diagramOnMouseMove(ev) {
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_diagram.onmousemove(ev);
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}
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var Diagrams = /** @class */ (function () {
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function Diagrams(canvasId) {
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this.canvas = document.getElementById(canvasId);
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if (this.canvas === null) {
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throw "Could not getElementById " + canvasId;
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}
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var ctx = this.canvas.getContext("2d");
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if (ctx === null) {
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throw "Could not get 2d rendering context";
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}
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_diagram = this;
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this.ctx = ctx;
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this.ctx.font = "30px Arial";
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this.canvas.onmousemove = diagramOnMouseMove;
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this.canvas.onmousedown = diagramOnMouseDown;
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this.canvas.onmouseup = diagramOnMouseUp;
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window.onresize = diargramOnResize;
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this.nodes = new Array();
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this.connections = new Array();
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this.cameraX = 0;
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this.cameraY = 0;
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}
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Diagrams.prototype.onmousemove = function (ev) {
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if (this.panning) {
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this.cameraX += ev.movementX;
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this.cameraY += ev.movementY;
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}
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if (this.nodeDrag) {
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if (this.nodeDragged === null) {
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console.error("nodeDrag==true but nodeDragged==null");
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return;
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}
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this.nodeDragged.x += ev.movementX;
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this.nodeDragged.y += ev.movementY;
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}
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this.draw();
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};
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Diagrams.prototype.onmousedown = function (ev) {
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if (ev.button != 0) {
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return;
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}
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var canvasRect = this.canvas.getBoundingClientRect();
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var mouseX = ev.x - canvasRect.left;
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var mouseY = ev.y - canvasRect.top;
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for (var _i = 0, _a = this.nodes; _i < _a.length; _i++) {
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var node = _a[_i];
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if (node.pointInDiagram(mouseX, mouseY)) {
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this.nodeDrag = true;
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this.nodeDragged = node;
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return;
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}
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}
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this.panning = true;
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};
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Diagrams.prototype.onmouseup = function (ev) {
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this.panning = false;
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this.nodeDrag = false;
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this.nodeDragged = null;
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};
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Diagrams.prototype.drawBackground = function () {
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this.ctx.fillStyle = "#D8D8D8";
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this.ctx.fillRect(0, 0, this.canvas.width, this.canvas.height);
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this.ctx.strokeStyle = "#888";
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this.ctx.lineWidth = 5;
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this.ctx.strokeRect(0, 0, this.canvas.width, this.canvas.height);
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};
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Diagrams.prototype.draw = function () {
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this.ctx.clearRect(0, 0, this.canvas.width, this.canvas.height);
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this.drawBackground();
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for (var _i = 0, _a = this.nodes; _i < _a.length; _i++) {
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var node = _a[_i];
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this.ctx.fillStyle = "gray";
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this.ctx.fillRect(node.x + this.cameraX, node.y + this.cameraY, node.width, node.height);
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this.ctx.fillStyle = "black";
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this.ctx.font = "30px Arial";
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this.ctx.fillText(node.label, node.x + this.cameraX + node.height / 2, node.y + this.cameraY + node.height / 1.5);
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}
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};
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Diagrams.prototype.addNode = function (x, y, label) {
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var textSize = this.ctx.measureText(label);
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var textHeight = 2 * (textSize.actualBoundingBoxAscent + textSize.actualBoundingBoxDescent);
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this.nodes.push(new DiagramNode(x, y, textSize.width + textHeight, textHeight, label));
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};
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Diagrams.prototype.addConnection = function (A, B) {
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this.connections.push([A, B]);
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};
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Diagrams.prototype.fillParent = function () {
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this.canvas.width = this.canvas.clientWidth;
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this.canvas.height = this.canvas.clientHeight;
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this.draw();
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};
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return Diagrams;
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}());
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