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207 lines
8.1 KiB
207 lines
8.1 KiB
var util = require('../../../util');
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var Hammer = require('../../../module/hammer');
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var hammerUtil = require('../../../hammerUtil');
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var keycharm = require('keycharm');
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class NavigationHandler {
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constructor(body, canvas) {
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this.body = body;
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this.canvas = canvas;
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this.iconsCreated = false;
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this.navigationHammers = [];
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this.boundFunctions = {};
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this.touchTime = 0;
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this.activated = false;
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this.body.emitter.on("release", () => {this._stopMovement();});
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this.body.emitter.on("activate", () => {this.activated = true; this.configureKeyboardBindings();});
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this.body.emitter.on("deactivate", () => {this.activated = false; this.configureKeyboardBindings();});
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this.body.emitter.on("destroy", () => {if (this.keycharm !== undefined) {this.keycharm.destroy();}});
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this.options = {}
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}
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setOptions(options) {
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if (options !== undefined) {
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this.options = options;
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this.create();
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}
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}
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create() {
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if (this.options.navigationButtons === true) {
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if (this.iconsCreated === false) {
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this.loadNavigationElements();
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}
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}
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else if (this.iconsCreated === true) {
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this.cleanNavigation();
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}
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this.configureKeyboardBindings();
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}
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cleanNavigation() {
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// clean hammer bindings
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if (this.navigationHammers.length != 0) {
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for (var i = 0; i < this.navigationHammers.length; i++) {
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this.navigationHammers[i].destroy();
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}
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this.navigationHammers = [];
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}
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// clean up previous navigation items
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if (this.navigationDOM && this.navigationDOM['wrapper'] && this.navigationDOM['wrapper'].parentNode) {
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this.navigationDOM['wrapper'].parentNode.removeChild(this.navigationDOM['wrapper']);
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}
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this.iconsCreated = false;
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}
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/**
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* Creation of the navigation controls nodes. They are drawn over the rest of the nodes and are not affected by scale and translation
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* they have a triggerFunction which is called on click. If the position of the navigation controls is dependent
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* on this.frame.canvas.clientWidth or this.frame.canvas.clientHeight, we flag horizontalAlignLeft and verticalAlignTop false.
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* This means that the location will be corrected by the _relocateNavigation function on a size change of the canvas.
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*
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* @private
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*/
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loadNavigationElements() {
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this.cleanNavigation();
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this.navigationDOM = {};
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var navigationDivs = ['up','down','left','right','zoomIn','zoomOut','zoomExtends'];
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var navigationDivActions = ['_moveUp','_moveDown','_moveLeft','_moveRight','_zoomIn','_zoomOut','_fit'];
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this.navigationDOM['wrapper'] = document.createElement('div');
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this.navigationDOM['wrapper'].className = 'vis-navigation';
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this.canvas.frame.appendChild(this.navigationDOM['wrapper']);
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for (var i = 0; i < navigationDivs.length; i++) {
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this.navigationDOM[navigationDivs[i]] = document.createElement('div');
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this.navigationDOM[navigationDivs[i]].className = 'vis-button vis-' + navigationDivs[i];
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this.navigationDOM['wrapper'].appendChild(this.navigationDOM[navigationDivs[i]]);
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var hammer = new Hammer(this.navigationDOM[navigationDivs[i]]);
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if (navigationDivActions[i] === "_fit") {
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hammerUtil.onTouch(hammer, this._fit.bind(this));
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}
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else {
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hammerUtil.onTouch(hammer, this.bindToRedraw.bind(this,navigationDivActions[i]));
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}
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this.navigationHammers.push(hammer);
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}
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this.iconsCreated = true;
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}
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bindToRedraw(action) {
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if (this.boundFunctions[action] === undefined) {
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this.boundFunctions[action] = this[action].bind(this);
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this.body.emitter.on("initRedraw", this.boundFunctions[action]);
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this.body.emitter.emit("_startRendering");
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}
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}
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unbindFromRedraw(action) {
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if (this.boundFunctions[action] !== undefined) {
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this.body.emitter.off("initRedraw", this.boundFunctions[action]);
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this.body.emitter.emit("_stopRendering");
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delete this.boundFunctions[action];
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}
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}
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/**
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* this stops all movement induced by the navigation buttons
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*
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* @private
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*/
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_fit() {
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if (new Date().valueOf() - this.touchTime > 700) { // TODO: fix ugly hack to avoid hammer's double fireing of event (because we use release?)
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this.body.emitter.emit("fit", {duration: 700});
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this.touchTime = new Date().valueOf();
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}
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}
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/**
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* this stops all movement induced by the navigation buttons
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*
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* @private
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*/
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_stopMovement() {
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for (let boundAction in this.boundFunctions) {
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if (this.boundFunctions.hasOwnProperty(boundAction)) {
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this.body.emitter.off("initRedraw", this.boundFunctions[boundAction]);
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this.body.emitter.emit("_stopRendering");
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}
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}
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this.boundFunctions = {};
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}
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_moveUp() {this.body.view.translation.y += this.options.keyboard.speed.y;}
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_moveDown() {this.body.view.translation.y -= this.options.keyboard.speed.y;}
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_moveLeft() {this.body.view.translation.x += this.options.keyboard.speed.x;}
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_moveRight(){this.body.view.translation.x -= this.options.keyboard.speed.x;}
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_zoomIn() {
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this.body.view.scale *= 1+this.options.keyboard.speed.zoom;
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this.body.emitter.emit('zoom', {direction: '+', scale: this.body.view.scale});}
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_zoomOut() {
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this.body.view.scale /= 1+this.options.keyboard.speed.zoom;
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this.body.emitter.emit('zoom', {direction: '-', scale: this.body.view.scale});
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}
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/**
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* bind all keys using keycharm.
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*/
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configureKeyboardBindings() {
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if (this.keycharm !== undefined) {
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this.keycharm.destroy();
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}
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if (this.options.keyboard.enabled === true) {
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if (this.options.keyboard.bindToWindow === true) {
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this.keycharm = keycharm({container: window, preventDefault: true});
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}
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else {
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this.keycharm = keycharm({container: this.canvas.frame, preventDefault: true});
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}
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this.keycharm.reset();
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if (this.activated === true) {
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this.keycharm.bind("up", () => {this.bindToRedraw("_moveUp") ;}, "keydown");
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this.keycharm.bind("down", () => {this.bindToRedraw("_moveDown") ;}, "keydown");
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this.keycharm.bind("left", () => {this.bindToRedraw("_moveLeft") ;}, "keydown");
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this.keycharm.bind("right", () => {this.bindToRedraw("_moveRight");}, "keydown");
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this.keycharm.bind("=", () => {this.bindToRedraw("_zoomIn") ;}, "keydown");
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this.keycharm.bind("num+", () => {this.bindToRedraw("_zoomIn") ;}, "keydown");
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this.keycharm.bind("num-", () => {this.bindToRedraw("_zoomOut") ;}, "keydown");
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this.keycharm.bind("-", () => {this.bindToRedraw("_zoomOut") ;}, "keydown");
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this.keycharm.bind("[", () => {this.bindToRedraw("_zoomOut") ;}, "keydown");
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this.keycharm.bind("]", () => {this.bindToRedraw("_zoomIn") ;}, "keydown");
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this.keycharm.bind("pageup", () => {this.bindToRedraw("_zoomIn") ;}, "keydown");
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this.keycharm.bind("pagedown", () => {this.bindToRedraw("_zoomOut") ;}, "keydown");
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this.keycharm.bind("up", () => {this.unbindFromRedraw("_moveUp") ;}, "keyup");
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this.keycharm.bind("down", () => {this.unbindFromRedraw("_moveDown") ;}, "keyup");
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this.keycharm.bind("left", () => {this.unbindFromRedraw("_moveLeft") ;}, "keyup");
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this.keycharm.bind("right", () => {this.unbindFromRedraw("_moveRight");}, "keyup");
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this.keycharm.bind("=", () => {this.unbindFromRedraw("_zoomIn") ;}, "keyup");
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this.keycharm.bind("num+", () => {this.unbindFromRedraw("_zoomIn") ;}, "keyup");
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this.keycharm.bind("num-", () => {this.unbindFromRedraw("_zoomOut") ;}, "keyup");
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this.keycharm.bind("-", () => {this.unbindFromRedraw("_zoomOut") ;}, "keyup");
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this.keycharm.bind("[", () => {this.unbindFromRedraw("_zoomOut") ;}, "keyup");
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this.keycharm.bind("]", () => {this.unbindFromRedraw("_zoomIn") ;}, "keyup");
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this.keycharm.bind("pageup", () => {this.unbindFromRedraw("_zoomIn") ;}, "keyup");
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this.keycharm.bind("pagedown", () => {this.unbindFromRedraw("_zoomOut") ;}, "keyup");
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}
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}
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}
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}
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export default NavigationHandler;
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