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.
633 lines
19 KiB
633 lines
19 KiB
/**
|
|
* Created by Alex on 2/27/2015.
|
|
*
|
|
*/
|
|
|
|
let util = require('../../util');
|
|
|
|
import NavigationHandler from "./components/NavigationHandler"
|
|
import Popup from "./components/Popup"
|
|
|
|
class InteractionHandler {
|
|
constructor(body, canvas, selectionHandler) {
|
|
this.body = body;
|
|
this.canvas = canvas;
|
|
this.selectionHandler = selectionHandler;
|
|
this.navigationHandler = new NavigationHandler(body,canvas);
|
|
|
|
// bind the events from hammer to functions in this object
|
|
this.body.eventListeners.onTap = this.onTap.bind(this);
|
|
this.body.eventListeners.onTouch = this.onTouch.bind(this);
|
|
this.body.eventListeners.onDoubleTap = this.onDoubleTap.bind(this);
|
|
this.body.eventListeners.onHold = this.onHold.bind(this);
|
|
this.body.eventListeners.onDragStart = this.onDragStart.bind(this);
|
|
this.body.eventListeners.onDrag = this.onDrag.bind(this);
|
|
this.body.eventListeners.onDragEnd = this.onDragEnd.bind(this);
|
|
this.body.eventListeners.onMouseWheel = this.onMouseWheel.bind(this);
|
|
this.body.eventListeners.onPinch = this.onPinch.bind(this);
|
|
this.body.eventListeners.onMouseMove = this.onMouseMove.bind(this);
|
|
this.body.eventListeners.onRelease = this.onRelease.bind(this);
|
|
|
|
this.touchTime = 0;
|
|
this.drag = {};
|
|
this.pinch = {};
|
|
this.hoverObj = {nodes:{},edges:{}};
|
|
this.popup = undefined;
|
|
this.popupObj = undefined;
|
|
this.popupTimer = undefined;
|
|
|
|
this.body.functions.getPointer = this.getPointer.bind(this);
|
|
|
|
this.options = {};
|
|
this.defaultOptions = {
|
|
dragNodes:true,
|
|
dragView: true,
|
|
zoomView: true,
|
|
hoverEnabled: false,
|
|
showNavigationIcons: false,
|
|
tooltip: {
|
|
delay: 300,
|
|
fontColor: '#000000',
|
|
fontSize: 14, // px
|
|
fontFace: 'verdana',
|
|
color: {
|
|
border: '#666666',
|
|
background: '#FFFFC6'
|
|
}
|
|
},
|
|
keyboard: {
|
|
enabled: false,
|
|
speed: {x: 10, y: 10, zoom: 0.02},
|
|
bindToWindow: true
|
|
}
|
|
}
|
|
util.extend(this.options,this.defaultOptions);
|
|
}
|
|
|
|
setOptions(options) {
|
|
if (options !== undefined) {
|
|
// extend all but the values in fields
|
|
let fields = ['keyboard','tooltip'];
|
|
util.selectiveNotDeepExtend(fields,this.options, options);
|
|
|
|
// merge the keyboard options in.
|
|
util.mergeOptions(this.options, options, 'keyboard');
|
|
|
|
if (options.tooltip) {
|
|
util.extend(this.options.tooltip, options.tooltip);
|
|
if (options.tooltip.color) {
|
|
this.options.tooltip.color = util.parseColor(options.tooltip.color);
|
|
}
|
|
}
|
|
}
|
|
|
|
this.navigationHandler.setOptions(this.options);
|
|
}
|
|
|
|
|
|
/**
|
|
* Get the pointer location from a touch location
|
|
* @param {{x: Number, y: Number}} touch
|
|
* @return {{x: Number, y: Number}} pointer
|
|
* @private
|
|
*/
|
|
getPointer(touch) {
|
|
return {
|
|
x: touch.x - util.getAbsoluteLeft(this.canvas.frame.canvas),
|
|
y: touch.y - util.getAbsoluteTop(this.canvas.frame.canvas)
|
|
};
|
|
}
|
|
|
|
|
|
/**
|
|
* On start of a touch gesture, store the pointer
|
|
* @param event
|
|
* @private
|
|
*/
|
|
onTouch(event) {
|
|
if (new Date().valueOf() - this.touchTime > 100) {
|
|
this.drag.pointer = this.getPointer(event.center);
|
|
this.drag.pinched = false;
|
|
this.pinch.scale = this.body.view.scale;
|
|
// to avoid double fireing of this event because we have two hammer instances. (on canvas and on frame)
|
|
this.touchTime = new Date().valueOf();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* handle tap/click event: select/unselect a node
|
|
* @private
|
|
*/
|
|
onTap(event) {
|
|
let pointer = this.getPointer(event.center);
|
|
|
|
let previouslySelected = this.selectionHandler._getSelectedObjectCount() > 0;
|
|
let selected = this.selectionHandler.selectOnPoint(pointer);
|
|
|
|
if (selected === true || (previouslySelected == true && selected === false)) { // select or unselect
|
|
this.body.emitter.emit('select', this.selectionHandler.getSelection());
|
|
}
|
|
|
|
this.selectionHandler._generateClickEvent("click",pointer);
|
|
}
|
|
|
|
|
|
/**
|
|
* handle doubletap event
|
|
* @private
|
|
*/
|
|
onDoubleTap(event) {
|
|
let pointer = this.getPointer(event.center);
|
|
this.selectionHandler._generateClickEvent("doubleClick",pointer);
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
* handle long tap event: multi select nodes
|
|
* @private
|
|
*/
|
|
onHold(event) {
|
|
let pointer = this.getPointer(event.center);
|
|
|
|
let selectionChanged = this.selectionHandler.selectAdditionalOnPoint(pointer);
|
|
|
|
if (selectionChanged === true) { // select or longpress
|
|
this.body.emitter.emit('select', this.selectionHandler.getSelection());
|
|
}
|
|
|
|
this.selectionHandler._generateClickEvent("click",pointer);
|
|
}
|
|
|
|
|
|
/**
|
|
* handle the release of the screen
|
|
*
|
|
* @private
|
|
*/
|
|
onRelease(event) {
|
|
this.body.emitter.emit("release",event)
|
|
}
|
|
|
|
|
|
/**
|
|
* This function is called by onDragStart.
|
|
* It is separated out because we can then overload it for the datamanipulation system.
|
|
*
|
|
* @private
|
|
*/
|
|
onDragStart(event) {
|
|
//in case the touch event was triggered on an external div, do the initial touch now.
|
|
if (this.drag.pointer === undefined) {
|
|
this.onTouch(event);
|
|
}
|
|
|
|
// note: drag.pointer is set in onTouch to get the initial touch location
|
|
let node = this.selectionHandler.getNodeAt(this.drag.pointer);
|
|
|
|
this.drag.dragging = true;
|
|
this.drag.selection = [];
|
|
this.drag.translation = util.extend({},this.body.view.translation); // copy the object
|
|
this.drag.nodeId = undefined;
|
|
|
|
this.body.emitter.emit("dragStart", {nodeIds: this.selectionHandler.getSelection().nodes});
|
|
|
|
if (node !== undefined && this.options.dragNodes === true) {
|
|
this.drag.nodeId = node.id;
|
|
// select the clicked node if not yet selected
|
|
if (node.isSelected() === false) {
|
|
this.selectionHandler.unselectAll();
|
|
this.selectionHandler.selectObject(node);
|
|
}
|
|
|
|
let selection = this.selectionHandler.selectionObj.nodes;
|
|
// create an array with the selected nodes and their original location and status
|
|
for (let nodeId in selection) {
|
|
if (selection.hasOwnProperty(nodeId)) {
|
|
let object = selection[nodeId];
|
|
let s = {
|
|
id: object.id,
|
|
node: object,
|
|
|
|
// store original x, y, xFixed and yFixed, make the node temporarily Fixed
|
|
x: object.x,
|
|
y: object.y,
|
|
xFixed: object.options.fixed.x,
|
|
yFixed: object.options.fixed.y
|
|
};
|
|
|
|
object.options.fixed.x = true;
|
|
object.options.fixed.y = true;
|
|
|
|
this.drag.selection.push(s);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* handle drag event
|
|
* @private
|
|
*/
|
|
onDrag(event) {
|
|
if (this.drag.pinched === true) {
|
|
return;
|
|
}
|
|
|
|
// remove the focus on node if it is focussed on by the focusOnNode
|
|
this.body.emitter.emit("unlockNode");
|
|
|
|
let pointer = this.getPointer(event.center);
|
|
let selection = this.drag.selection;
|
|
if (selection && selection.length && this.options.dragNodes === true) {
|
|
// calculate delta's and new location
|
|
let deltaX = pointer.x - this.drag.pointer.x;
|
|
let deltaY = pointer.y - this.drag.pointer.y;
|
|
|
|
// update position of all selected nodes
|
|
selection.forEach((selection) => {
|
|
let node = selection.node;
|
|
// only move the node if it was not fixed initially
|
|
if (selection.xFixed === false) {
|
|
node.x = this.canvas._XconvertDOMtoCanvas(this.canvas._XconvertCanvasToDOM(selection.x) + deltaX);
|
|
}
|
|
// only move the node if it was not fixed initially
|
|
if (selection.yFixed === false) {
|
|
node.y = this.canvas._YconvertDOMtoCanvas(this.canvas._YconvertCanvasToDOM(selection.y) + deltaY);
|
|
}
|
|
});
|
|
|
|
// start the simulation of the physics
|
|
this.body.emitter.emit("startSimulation");
|
|
}
|
|
else {
|
|
// move the network
|
|
if (this.options.dragView === true) {
|
|
// if the drag was not started properly because the click started outside the network div, start it now.
|
|
if (this.drag.pointer === undefined) {
|
|
this._handleDragStart(event);
|
|
return;
|
|
}
|
|
let diffX = pointer.x - this.drag.pointer.x;
|
|
let diffY = pointer.y - this.drag.pointer.y;
|
|
|
|
this.body.view.translation = {x:this.drag.translation.x + diffX, y:this.drag.translation.y + diffY};
|
|
this.body.emitter.emit("_redraw");
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* handle drag start event
|
|
* @private
|
|
*/
|
|
onDragEnd(event) {
|
|
this.drag.dragging = false;
|
|
let selection = this.drag.selection;
|
|
if (selection && selection.length) {
|
|
selection.forEach(function (s) {
|
|
// restore original xFixed and yFixed
|
|
s.node.options.fixed.x = s.xFixed;
|
|
s.node.options.fixed.y = s.yFixed;
|
|
});
|
|
this.body.emitter.emit("startSimulation");
|
|
}
|
|
else {
|
|
this.body.emitter.emit("_requestRedraw");
|
|
}
|
|
|
|
this.body.emitter.emit("dragEnd", {nodeIds: this.selectionHandler.getSelection().nodes});
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
* Handle pinch event
|
|
* @param event
|
|
* @private
|
|
*/
|
|
onPinch(event) {
|
|
let pointer = this.getPointer(event.center);
|
|
|
|
this.drag.pinched = true;
|
|
if (this.pinch['scale'] === undefined) {
|
|
this.pinch.scale = 1;
|
|
}
|
|
|
|
// TODO: enabled moving while pinching?
|
|
let scale = this.pinch.scale * event.scale;
|
|
this.zoom(scale, pointer)
|
|
}
|
|
|
|
|
|
/**
|
|
* Zoom the network in or out
|
|
* @param {Number} scale a number around 1, and between 0.01 and 10
|
|
* @param {{x: Number, y: Number}} pointer Position on screen
|
|
* @return {Number} appliedScale scale is limited within the boundaries
|
|
* @private
|
|
*/
|
|
zoom(scale, pointer) {
|
|
if (this.options.zoomView === true) {
|
|
let scaleOld = this.body.view.scale;
|
|
if (scale < 0.00001) {
|
|
scale = 0.00001;
|
|
}
|
|
if (scale > 10) {
|
|
scale = 10;
|
|
}
|
|
|
|
let preScaleDragPointer = undefined;
|
|
if (this.drag !== undefined) {
|
|
if (this.drag.dragging === true) {
|
|
preScaleDragPointer = this.canvas.DOMtoCanvas(this.drag.pointer);
|
|
}
|
|
}
|
|
// + this.canvas.frame.canvas.clientHeight / 2
|
|
let translation = this.body.view.translation;
|
|
|
|
let scaleFrac = scale / scaleOld;
|
|
let tx = (1 - scaleFrac) * pointer.x + translation.x * scaleFrac;
|
|
let ty = (1 - scaleFrac) * pointer.y + translation.y * scaleFrac;
|
|
|
|
this.body.view.scale = scale;
|
|
this.body.view.translation = {x:tx, y:ty};
|
|
|
|
if (preScaleDragPointer != undefined) {
|
|
let postScaleDragPointer = this.canvas.canvasToDOM(preScaleDragPointer);
|
|
this.drag.pointer.x = postScaleDragPointer.x;
|
|
this.drag.pointer.y = postScaleDragPointer.y;
|
|
}
|
|
|
|
this.body.emitter.emit("_requestRedraw");
|
|
|
|
if (scaleOld < scale) {
|
|
this.body.emitter.emit("zoom", {direction: "+"});
|
|
}
|
|
else {
|
|
this.body.emitter.emit("zoom", {direction: "-"});
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* Event handler for mouse wheel event, used to zoom the timeline
|
|
* See http://adomas.org/javascript-mouse-wheel/
|
|
* https://github.com/EightMedia/hammer.js/issues/256
|
|
* @param {MouseEvent} event
|
|
* @private
|
|
*/
|
|
onMouseWheel(event) {
|
|
// retrieve delta
|
|
let delta = 0;
|
|
if (event.wheelDelta) { /* IE/Opera. */
|
|
delta = event.wheelDelta / 120;
|
|
} else if (event.detail) { /* Mozilla case. */
|
|
// In Mozilla, sign of delta is different than in IE.
|
|
// Also, delta is multiple of 3.
|
|
delta = -event.detail / 3;
|
|
}
|
|
|
|
// If delta is nonzero, handle it.
|
|
// Basically, delta is now positive if wheel was scrolled up,
|
|
// and negative, if wheel was scrolled down.
|
|
if (delta !== 0) {
|
|
|
|
// calculate the new scale
|
|
let scale = this.body.view.scale;
|
|
let zoom = delta / 10;
|
|
if (delta < 0) {
|
|
zoom = zoom / (1 - zoom);
|
|
}
|
|
scale *= (1 + zoom);
|
|
|
|
// calculate the pointer location
|
|
let pointer = this.getPointer({x:event.pageX, y:event.pageY});
|
|
|
|
// apply the new scale
|
|
this.zoom(scale, pointer);
|
|
}
|
|
|
|
// Prevent default actions caused by mouse wheel.
|
|
event.preventDefault();
|
|
}
|
|
|
|
|
|
/**
|
|
* Mouse move handler for checking whether the title moves over a node with a title.
|
|
* @param {Event} event
|
|
* @private
|
|
*/
|
|
onMouseMove(event) {
|
|
let pointer = this.getPointer({x:event.pageX, y:event.pageY});
|
|
let popupVisible = false;
|
|
|
|
// check if the previously selected node is still selected
|
|
if (this.popup !== undefined) {
|
|
if (this.popup.hidden === false) {
|
|
this._checkHidePopup(pointer);
|
|
}
|
|
|
|
// if the popup was not hidden above
|
|
if (this.popup.hidden === false) {
|
|
popupVisible = true;
|
|
this.popup.setPosition(pointer.x + 3, pointer.y - 5)
|
|
this.popup.show();
|
|
}
|
|
}
|
|
|
|
// if we bind the keyboard to the div, we have to highlight it to use it. This highlights it on mouse over.
|
|
if (this.options.keyboard.bindToWindow == false && this.options.keyboard.enabled === true) {
|
|
this.canvas.frame.focus();
|
|
}
|
|
|
|
// start a timeout that will check if the mouse is positioned above an element
|
|
if (popupVisible === false) {
|
|
if (this.popupTimer !== undefined) {
|
|
clearInterval(this.popupTimer); // stop any running calculationTimer
|
|
this.popupTimer = undefined;
|
|
}
|
|
if (!this.drag.dragging) {
|
|
this.popupTimer = setTimeout(() => this._checkShowPopup(pointer), this.options.tooltip.delay);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Adding hover highlights
|
|
*/
|
|
if (this.options.hoverEnabled === true) {
|
|
// removing all hover highlights
|
|
for (let edgeId in this.hoverObj.edges) {
|
|
if (this.hoverObj.edges.hasOwnProperty(edgeId)) {
|
|
this.hoverObj.edges[edgeId].hover = false;
|
|
delete this.hoverObj.edges[edgeId];
|
|
}
|
|
}
|
|
|
|
// adding hover highlights
|
|
let obj = this.selectionHandler.getNodeAt(pointer);
|
|
if (obj == undefined) {
|
|
obj = this.selectionHandler.getEdgeAt(pointer);
|
|
}
|
|
if (obj != undefined) {
|
|
this.selectionHandler.hoverObject(obj);
|
|
}
|
|
|
|
// removing all node hover highlights except for the selected one.
|
|
for (let nodeId in this.hoverObj.nodes) {
|
|
if (this.hoverObj.nodes.hasOwnProperty(nodeId)) {
|
|
if (obj instanceof Node && obj.id != nodeId || obj instanceof Edge || obj == undefined) {
|
|
this.selectionHandler.blurObject(this.hoverObj.nodes[nodeId]);
|
|
delete this.hoverObj.nodes[nodeId];
|
|
}
|
|
}
|
|
}
|
|
this.body.emitter.emit("_requestRedraw");
|
|
}
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
* Check if there is an element on the given position in the network
|
|
* (a node or edge). If so, and if this element has a title,
|
|
* show a popup window with its title.
|
|
*
|
|
* @param {{x:Number, y:Number}} pointer
|
|
* @private
|
|
*/
|
|
_checkShowPopup(pointer) {
|
|
let x = this.canvas._XconvertDOMtoCanvas(pointer.x);
|
|
let y = this.canvas._YconvertDOMtoCanvas(pointer.y);
|
|
let pointerObj = {
|
|
left: x,
|
|
top: y,
|
|
right: x,
|
|
bottom: y
|
|
};
|
|
|
|
let previousPopupObjId = this.popupObj === undefined ? "" : this.popupObj.id;
|
|
let nodeUnderCursor = false;
|
|
let popupType = "node";
|
|
|
|
// check if a node is under the cursor.
|
|
if (this.popupObj === undefined) {
|
|
// search the nodes for overlap, select the top one in case of multiple nodes
|
|
let nodeIndices = this.body.nodeIndices;
|
|
let nodes = this.body.nodes;
|
|
let node;
|
|
let overlappingNodes = [];
|
|
for (let i = 0; i < nodeIndices.length; i++) {
|
|
node = nodes[nodeIndices[i]];
|
|
if (node.isOverlappingWith(pointerObj) === true) {
|
|
if (node.getTitle() !== undefined) {
|
|
overlappingNodes.push(nodeIndices[i]);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (overlappingNodes.length > 0) {
|
|
// if there are overlapping nodes, select the last one, this is the one which is drawn on top of the others
|
|
this.popupObj = nodes[overlappingNodes[overlappingNodes.length - 1]];
|
|
// if you hover over a node, the title of the edge is not supposed to be shown.
|
|
nodeUnderCursor = true;
|
|
}
|
|
}
|
|
|
|
if (this.popupObj === undefined && nodeUnderCursor == false) {
|
|
// search the edges for overlap
|
|
let edgeIndices = this.body.edgeIndices;
|
|
let edges = this.body.edges;
|
|
let edge;
|
|
let overlappingEdges = [];
|
|
for (let i = 0; i < edgeIndices.length; i++) {
|
|
edge = edges[edgeIndices[i]];
|
|
if (edge.isOverlappingWith(pointerObj) === true) {
|
|
if (edge.connected === true && edge.getTitle() !== undefined) {
|
|
overlappingEdges.push(edgeIndices[i]);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (overlappingEdges.length > 0) {
|
|
this.popupObj = edges[overlappingEdges[overlappingEdges.length - 1]];
|
|
popupType = "edge";
|
|
}
|
|
}
|
|
|
|
if (this.popupObj !== undefined) {
|
|
// show popup message window
|
|
if (this.popupObj.id != previousPopupObjId) {
|
|
if (this.popup === undefined) {
|
|
this.popup = new Popup(this.frame, this.options.tooltip);
|
|
}
|
|
|
|
this.popup.popupTargetType = popupType;
|
|
this.popup.popupTargetId = this.popupObj.id;
|
|
|
|
// adjust a small offset such that the mouse cursor is located in the
|
|
// bottom left location of the popup, and you can easily move over the
|
|
// popup area
|
|
this.popup.setPosition(pointer.x + 3, pointer.y - 5);
|
|
this.popup.setText(this.popupObj.getTitle());
|
|
this.popup.show();
|
|
}
|
|
}
|
|
else {
|
|
if (this.popup) {
|
|
this.popup.hide();
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* Check if the popup must be hidden, which is the case when the mouse is no
|
|
* longer hovering on the object
|
|
* @param {{x:Number, y:Number}} pointer
|
|
* @private
|
|
*/
|
|
_checkHidePopup(pointer) {
|
|
let x = this.canvas._XconvertDOMtoCanvas(pointer.x);
|
|
let y = this.canvas._YconvertDOMtoCanvas(pointer.y);
|
|
let pointerObj = {
|
|
left: x,
|
|
top: y,
|
|
right: x,
|
|
bottom: y
|
|
};
|
|
|
|
let stillOnObj = false;
|
|
if (this.popup.popupTargetType == 'node') {
|
|
if (this.body.nodes[this.popup.popupTargetId] !== undefined) {
|
|
stillOnObj = this.body.nodes[this.popup.popupTargetId].isOverlappingWith(pointerObj);
|
|
|
|
// if the mouse is still one the node, we have to check if it is not also on one that is drawn on top of it.
|
|
// we initially only check stillOnObj because this is much faster.
|
|
if (stillOnObj === true) {
|
|
let overNode = this.selectionHandler.getNodeAt(pointer);
|
|
stillOnObj = overNode.id == this.popup.popupTargetId;
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
if (this.selectionHandler.getNodeAt(pointer) === undefined) {
|
|
if (this.body.edges[this.popup.popupTargetId] !== undefined) {
|
|
stillOnObj = this.body.edges[this.popup.popupTargetId].isOverlappingWith(pointerObj);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
if (stillOnObj === false) {
|
|
this.popupObj = undefined;
|
|
this.popup.hide();
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
export default InteractionHandler;
|