You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
230 lines
9.2 KiB
230 lines
9.2 KiB
var util = require('../../../util');
|
|
var Hammer = require('../../../module/hammer');
|
|
var hammerUtil = require('../../../hammerUtil');
|
|
var keycharm = require('keycharm');
|
|
|
|
class NavigationHandler {
|
|
constructor(body, canvas) {
|
|
this.body = body;
|
|
this.canvas = canvas;
|
|
|
|
this.iconsCreated = false;
|
|
this.navigationHammers = [];
|
|
this.boundFunctions = {};
|
|
this.touchTime = 0;
|
|
this.activated = false;
|
|
|
|
|
|
this.body.emitter.on("activate", () => {this.activated = true; this.configureKeyboardBindings();});
|
|
this.body.emitter.on("deactivate", () => {this.activated = false; this.configureKeyboardBindings();});
|
|
this.body.emitter.on("destroy", () => {if (this.keycharm !== undefined) {this.keycharm.destroy();}});
|
|
|
|
this.options = {}
|
|
}
|
|
|
|
setOptions(options) {
|
|
if (options !== undefined) {
|
|
this.options = options;
|
|
this.create();
|
|
}
|
|
}
|
|
|
|
create() {
|
|
if (this.options.navigationButtons === true) {
|
|
if (this.iconsCreated === false) {
|
|
this.loadNavigationElements();
|
|
}
|
|
}
|
|
else if (this.iconsCreated === true) {
|
|
this.cleanNavigation();
|
|
}
|
|
|
|
this.configureKeyboardBindings();
|
|
}
|
|
|
|
cleanNavigation() {
|
|
// clean hammer bindings
|
|
if (this.navigationHammers.length != 0) {
|
|
for (var i = 0; i < this.navigationHammers.length; i++) {
|
|
this.navigationHammers[i].destroy();
|
|
}
|
|
this.navigationHammers = [];
|
|
}
|
|
|
|
// clean up previous navigation items
|
|
if (this.navigationDOM && this.navigationDOM['wrapper'] && this.navigationDOM['wrapper'].parentNode) {
|
|
this.navigationDOM['wrapper'].parentNode.removeChild(this.navigationDOM['wrapper']);
|
|
}
|
|
|
|
this.iconsCreated = false;
|
|
}
|
|
|
|
/**
|
|
* Creation of the navigation controls nodes. They are drawn over the rest of the nodes and are not affected by scale and translation
|
|
* they have a triggerFunction which is called on click. If the position of the navigation controls is dependent
|
|
* on this.frame.canvas.clientWidth or this.frame.canvas.clientHeight, we flag horizontalAlignLeft and verticalAlignTop false.
|
|
* This means that the location will be corrected by the _relocateNavigation function on a size change of the canvas.
|
|
*
|
|
* @private
|
|
*/
|
|
loadNavigationElements() {
|
|
this.cleanNavigation();
|
|
|
|
this.navigationDOM = {};
|
|
var navigationDivs = ['up','down','left','right','zoomIn','zoomOut','zoomExtends'];
|
|
var navigationDivActions = ['_moveUp','_moveDown','_moveLeft','_moveRight','_zoomIn','_zoomOut','_fit'];
|
|
|
|
this.navigationDOM['wrapper'] = document.createElement('div');
|
|
this.navigationDOM['wrapper'].className = 'vis-navigation';
|
|
this.canvas.frame.appendChild(this.navigationDOM['wrapper']);
|
|
|
|
for (var i = 0; i < navigationDivs.length; i++) {
|
|
this.navigationDOM[navigationDivs[i]] = document.createElement('div');
|
|
this.navigationDOM[navigationDivs[i]].className = 'vis-button vis-' + navigationDivs[i];
|
|
this.navigationDOM['wrapper'].appendChild(this.navigationDOM[navigationDivs[i]]);
|
|
|
|
var hammer = new Hammer(this.navigationDOM[navigationDivs[i]]);
|
|
if (navigationDivActions[i] === "_fit") {
|
|
hammerUtil.onTouch(hammer, this._fit.bind(this));
|
|
}
|
|
else {
|
|
hammerUtil.onTouch(hammer, this.bindToRedraw.bind(this,navigationDivActions[i]));
|
|
}
|
|
|
|
this.navigationHammers.push(hammer);
|
|
}
|
|
|
|
// use a hammer for the release so we do not require the one used in the rest of the network
|
|
// the one the rest uses can be overloaded by the manipulation system.
|
|
var hammerFrame = new Hammer(this.canvas.frame);
|
|
hammerUtil.onRelease(hammerFrame, () => {this._stopMovement();});
|
|
this.navigationHammers.push(hammerFrame);
|
|
|
|
this.iconsCreated = true;
|
|
}
|
|
|
|
bindToRedraw(action) {
|
|
if (this.boundFunctions[action] === undefined) {
|
|
this.boundFunctions[action] = this[action].bind(this);
|
|
this.body.emitter.on("initRedraw", this.boundFunctions[action]);
|
|
this.body.emitter.emit("_startRendering");
|
|
}
|
|
}
|
|
|
|
unbindFromRedraw(action) {
|
|
if (this.boundFunctions[action] !== undefined) {
|
|
this.body.emitter.off("initRedraw", this.boundFunctions[action]);
|
|
this.body.emitter.emit("_stopRendering");
|
|
delete this.boundFunctions[action];
|
|
}
|
|
}
|
|
|
|
/**
|
|
* this stops all movement induced by the navigation buttons
|
|
*
|
|
* @private
|
|
*/
|
|
_fit() {
|
|
if (new Date().valueOf() - this.touchTime > 700) { // TODO: fix ugly hack to avoid hammer's double fireing of event (because we use release?)
|
|
this.body.emitter.emit("fit", {duration: 700});
|
|
this.touchTime = new Date().valueOf();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* this stops all movement induced by the navigation buttons
|
|
*
|
|
* @private
|
|
*/
|
|
_stopMovement() {
|
|
for (let boundAction in this.boundFunctions) {
|
|
if (this.boundFunctions.hasOwnProperty(boundAction)) {
|
|
this.body.emitter.off("initRedraw", this.boundFunctions[boundAction]);
|
|
this.body.emitter.emit("_stopRendering");
|
|
}
|
|
}
|
|
this.boundFunctions = {};
|
|
}
|
|
|
|
_moveUp() {this.body.view.translation.y += this.options.keyboard.speed.y;}
|
|
_moveDown() {this.body.view.translation.y -= this.options.keyboard.speed.y;}
|
|
_moveLeft() {this.body.view.translation.x += this.options.keyboard.speed.x;}
|
|
_moveRight(){this.body.view.translation.x -= this.options.keyboard.speed.x;}
|
|
_zoomIn() {
|
|
var scaleOld = this.body.view.scale;
|
|
var scale = this.body.view.scale * (1 + this.options.keyboard.speed.zoom);
|
|
var translation = this.body.view.translation;
|
|
var scaleFrac = scale / scaleOld;
|
|
var tx = (1 - scaleFrac) * this.canvas.canvasViewCenter.x + translation.x * scaleFrac;
|
|
var ty = (1 - scaleFrac) * this.canvas.canvasViewCenter.y + translation.y * scaleFrac;
|
|
|
|
this.body.view.scale = scale;
|
|
this.body.view.translation = { x: tx, y: ty };
|
|
this.body.emitter.emit('zoom', { direction: '+', scale: this.body.view.scale, pointer: null });
|
|
|
|
}
|
|
_zoomOut() {
|
|
var scaleOld = this.body.view.scale;
|
|
var scale = this.body.view.scale / (1 + this.options.keyboard.speed.zoom);
|
|
var translation = this.body.view.translation;
|
|
var scaleFrac = scale / scaleOld;
|
|
var tx = (1 - scaleFrac) * this.canvas.canvasViewCenter.x + translation.x * scaleFrac;
|
|
var ty = (1 - scaleFrac) * this.canvas.canvasViewCenter.y + translation.y * scaleFrac;
|
|
|
|
this.body.view.scale = scale;
|
|
this.body.view.translation = { x: tx, y: ty };
|
|
this.body.emitter.emit('zoom', { direction: '-', scale: this.body.view.scale, pointer: null });
|
|
}
|
|
|
|
|
|
/**
|
|
* bind all keys using keycharm.
|
|
*/
|
|
configureKeyboardBindings() {
|
|
if (this.keycharm !== undefined) {
|
|
this.keycharm.destroy();
|
|
}
|
|
|
|
if (this.options.keyboard.enabled === true) {
|
|
if (this.options.keyboard.bindToWindow === true) {
|
|
this.keycharm = keycharm({container: window, preventDefault: true});
|
|
}
|
|
else {
|
|
this.keycharm = keycharm({container: this.canvas.frame, preventDefault: true});
|
|
}
|
|
|
|
this.keycharm.reset();
|
|
|
|
if (this.activated === true) {
|
|
this.keycharm.bind("up", () => {this.bindToRedraw("_moveUp") ;}, "keydown");
|
|
this.keycharm.bind("down", () => {this.bindToRedraw("_moveDown") ;}, "keydown");
|
|
this.keycharm.bind("left", () => {this.bindToRedraw("_moveLeft") ;}, "keydown");
|
|
this.keycharm.bind("right", () => {this.bindToRedraw("_moveRight");}, "keydown");
|
|
this.keycharm.bind("=", () => {this.bindToRedraw("_zoomIn") ;}, "keydown");
|
|
this.keycharm.bind("num+", () => {this.bindToRedraw("_zoomIn") ;}, "keydown");
|
|
this.keycharm.bind("num-", () => {this.bindToRedraw("_zoomOut") ;}, "keydown");
|
|
this.keycharm.bind("-", () => {this.bindToRedraw("_zoomOut") ;}, "keydown");
|
|
this.keycharm.bind("[", () => {this.bindToRedraw("_zoomOut") ;}, "keydown");
|
|
this.keycharm.bind("]", () => {this.bindToRedraw("_zoomIn") ;}, "keydown");
|
|
this.keycharm.bind("pageup", () => {this.bindToRedraw("_zoomIn") ;}, "keydown");
|
|
this.keycharm.bind("pagedown", () => {this.bindToRedraw("_zoomOut") ;}, "keydown");
|
|
|
|
this.keycharm.bind("up", () => {this.unbindFromRedraw("_moveUp") ;}, "keyup");
|
|
this.keycharm.bind("down", () => {this.unbindFromRedraw("_moveDown") ;}, "keyup");
|
|
this.keycharm.bind("left", () => {this.unbindFromRedraw("_moveLeft") ;}, "keyup");
|
|
this.keycharm.bind("right", () => {this.unbindFromRedraw("_moveRight");}, "keyup");
|
|
this.keycharm.bind("=", () => {this.unbindFromRedraw("_zoomIn") ;}, "keyup");
|
|
this.keycharm.bind("num+", () => {this.unbindFromRedraw("_zoomIn") ;}, "keyup");
|
|
this.keycharm.bind("num-", () => {this.unbindFromRedraw("_zoomOut") ;}, "keyup");
|
|
this.keycharm.bind("-", () => {this.unbindFromRedraw("_zoomOut") ;}, "keyup");
|
|
this.keycharm.bind("[", () => {this.unbindFromRedraw("_zoomOut") ;}, "keyup");
|
|
this.keycharm.bind("]", () => {this.unbindFromRedraw("_zoomIn") ;}, "keyup");
|
|
this.keycharm.bind("pageup", () => {this.unbindFromRedraw("_zoomIn") ;}, "keyup");
|
|
this.keycharm.bind("pagedown", () => {this.unbindFromRedraw("_zoomOut") ;}, "keyup");
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
export default NavigationHandler;
|