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View.js
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// Copyright 2013 - UDS/CNRS
// The Aladin Lite program is distributed under the terms
// of the GNU General Public License version 3.
//
// This file is part of Aladin Lite.
//
// Aladin Lite is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, version 3 of the License.
//
// Aladin Lite is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// The GNU General Public License is available in COPYING file
// along with Aladin Lite.
//
/******************************************************************************
* Aladin Lite project
*
* File View.js
*
* Author: Thomas Boch[CDS]
*
*****************************************************************************/
import { Aladin } from "./Aladin.js";
import A from "./A.js";
import { HealpixGrid } from "./HealpixGrid.js";
import { ProjectionEnum } from "./ProjectionEnum.js";
import { Utils } from "./Utils";
import { GenericPointer } from "./GenericPointer.js";
import { Stats } from "./libs/Stats.js";
import { CooFrameEnum } from "./CooFrameEnum.js";
import { requestAnimFrame } from "./libs/RequestAnimationFrame.js";
import { WebGLCtx } from "./WebGL.js";
import { ALEvent } from "./events/ALEvent.js";
import { Zoom } from './Zoom.js'
import { Footprint } from "./Footprint.js";
import { Selector } from "./Selector.js";
import { ObsCore } from "./vo/ObsCore.js";
import { DefaultActionsForContextMenu } from "./DefaultActionsForContextMenu.js";
import { Layout } from "./gui/Layout.js";
import { SAMPActionButton } from "./gui/Button/SAMP.js";
import { HiPS } from "./HiPS.js";
import { Image } from "./Image.js";
import { Color } from "./Color.js";
export let View = (function () {
/** Constructor */
function View(aladin) {
this.aladin = aladin;
// Add a reference to the WebGL API
this.options = aladin.options;
this.aladinDiv = this.aladin.aladinDiv;
this.createCanvases();
let self = this;
// reference to all overlay layers (= catalogs + overlays + mocs)
this.allOverlayLayers = []
// current catalogs displayed
this.catalogs = [];
// overlays (footprints for instance)
this.overlays = [];
// MOCs
this.mocs = [];
this.outsideFov = 0;
this.outside = false;
self.redrawClbk = this.redraw.bind(this);
// Init the WebGL context
// At this point, the view has been created so the image canvas too
try {
// Start our Rust application. You can find `WebClient` in `src/lib.rs`
// The Rust part should also create a new WebGL2 or WebGL1 context depending on the WebGL2 brower support.
const webglCtx = new WebGLCtx(Aladin.wasmLibs.core, this.aladinDiv);
this.aladin.wasm = webglCtx.webclient;
this.wasm = this.aladin.wasm;
ALEvent.AL_USE_WASM.listenedBy(this.aladinDiv, function (e) {
let callback = e.detail.callback;
callback(self.wasm);
});
} catch (e) {
// For browsers not supporting WebGL2:
// 1. Print the original exception message in the console
//console.error(e)
// 2. Add a more explicite message to the end user
console.error("Problem initializing Aladin Lite. Please contact the support by contacting Matthieu Baumann (baumannmatthieu0@gmail.com) or Thomas Boch (thomas.boch@astro.unistra.fr). You can also open an issue on the Aladin Lite github repository here: https://github.com/cds-astro/aladin-lite. Message error:" + e)
}
this._defineProperties();
// I realized debouncing a little bit the resize process
// prevents the div from flickering in white !
// Let's keep that like that (with a very small debounced time of 2ms).
this.debounceResize = Utils.debounce(() => {
self.wasm.resize(self.width, self.height);
self.updateZoomState()
}, 2);
// Attach the drag and drop events to the view
this.aladinDiv.ondrop = (event) => {
const files = Utils.getDroppedFilesHandler(event);
files.forEach((file) => {
const url = URL.createObjectURL(file);
// Consider other cases
try {
const image = self.aladin.createImageFITS(
url,
{name: file.name},
(ra, dec, fov, _) => {
// Center the view around the new fits object
aladin.gotoRaDec(ra, dec);
aladin.setFoV(fov * 1.1);
}
);
self.aladin.setOverlayImageLayer(image, file.name)
} catch(e) {
let moc = A.MOCFromURL(url);
self.aladin.addMOC(moc);
console.error("Only valid fits files supported (i.e. containig a WCS)", e)
throw e;
}
})
};
this.aladinDiv.ondragover = Utils.dragOverHandler;
this.throttledPositionChanged = Utils.throttle(
(dragging) => {
var posChangedFn = this.aladin.callbacksByEventName && this.aladin.callbacksByEventName['positionChanged'];
if (typeof posChangedFn === 'function') {
var pos = this.aladin.pix2world(this.width / 2, this.height / 2, 'icrs');
if (pos !== undefined) {
try {
posChangedFn({
ra: pos[0],
dec: pos[1],
dragging: dragging
});
} catch(e) {
console.error(e)
}
}
}
},
View.CALLBACKS_THROTTLE_TIME_MS,
);
this.throttledZoomChanged = Utils.throttle(
() => {
const fov = this.fov;
// trigger callback only if FoV (zoom) has changed !
if (fov !== this.oldFov) {
const fovChangedFn = this.aladin.callbacksByEventName['zoomChanged'];
(typeof fovChangedFn === 'function') && fovChangedFn(fov);
// finally, save fov value
this.oldFov = fov;
}
},
View.CALLBACKS_THROTTLE_TIME_MS,
);
this.throttledDivResized = Utils.throttle(
() => {
const resizeFn = self.aladin.callbacksByEventName['resizeChanged'];
(typeof resizeFn === 'function') && resizeFn(self.width, self.height);
},
View.CALLBACKS_THROTTLE_TIME_MS,
);
this.debounceProgCatOnZoom = Utils.debounce(() => {
self.refreshProgressiveCats();
self.drawAllOverlays();
}, 300);
this.mustClearCatalog = true;
this.mode = View.PAN;
this.healpixGrid = new HealpixGrid();
this.then = Date.now();
var lon, lat;
lon = lat = 0;
// FoV init settings
this.pinchZoomParameters = {
isPinching: false, // true if a pinch zoom is ongoing
initialZoomFactor: undefined,
initialDistance: undefined,
};
// Projection definition
const projName = (this.options && this.options.projection) || "SIN";
this.setProjection(projName)
// Then set the zoom properly once the projection is defined
this.fov = this.options.fov || 180.0
// Target position settings
this.viewCenter = { lon, lat }; // position of center of view
// Coo frame setting
const cooFrame = CooFrameEnum.fromString(this.options.cooFrame, CooFrameEnum.ICRS);
this.changeFrame(cooFrame);
this.selector = new Selector(this, this.options.selector);
this.manualSelection = (this.options && this.options.manualSelection) || false;
// current reference image survey displayed
this.imageLayers = new Map();
this.overlayLayers = [];
// a dedicated catalog for the popup
var c = document.createElement('canvas');
c.width = c.height = 24;
var ctx = c.getContext('2d');
ctx.lineWidth = 6.0;
ctx.beginPath();
ctx.strokeStyle = '#eee';
ctx.arc(12, 12, 8, 0, 2 * Math.PI, true);
ctx.stroke();
ctx.lineWidth = 3.0;
ctx.beginPath();
ctx.strokeStyle = '#c38';
ctx.arc(12, 12, 8, 0, 2 * Math.PI, true);
ctx.stroke();
this.catalogForPopup = A.catalog({ shape: c, sourceSize: 24 });
this.catalogForPopup.hide();
this.catalogForPopup.view = this;
this.overlayForPopup = A.graphicOverlay({color: '#ee2345', lineWidth: 3});
this.overlayForPopup.hide();
this.overlayForPopup.view = this;
this.empty = true;
this.promises = [];
this.firstHiPS = true;
this.curNorder = 1;
this.realNorder = 1;
this.imageLayersBeingQueried = new Map();
// some variables for mouse handling
this.dragging = false;
this.dragCoo = null;
this.selectedLayer = 'base';
this.needRedraw = true;
// two-fingers rotation
this.fingersRotationParameters = {
initialViewAngleFromCenter: undefined,
initialFingerAngle: undefined,
rotationInitiated: false
}
this.zoom = new Zoom(this);
this.fadingLatestUpdate = null;
this.dateRequestRedraw = null;
init(this);
// listen to window resize and reshape canvases
this.resizeTimer = null;
this.resizeObserver = new ResizeObserver(() => {
self.fixLayoutDimensions();
});
self.resizeObserver.observe(this.aladinDiv)
self.fixLayoutDimensions();
self.redraw()
};
// different available modes
View.PAN = 0;
View.SELECT = 1;
View.TOOL_SIMBAD_POINTER = 2;
// TODO: should be put as an option at layer level
View.DRAW_SOURCES_WHILE_DRAGGING = true;
View.DRAW_MOCS_WHILE_DRAGGING = true;
View.CALLBACKS_THROTTLE_TIME_MS = 100; // minimum time between two consecutive callback calls
View.prototype._defineProperties = function() {
Object.defineProperties(this, {
fov: {
get() {
return this.wasm.getFieldOfView();
},
set(newFov) {
this.setFoV(newFov);
}
},
zoomFactor: {
get() {
return this.wasm.getZoomFactor();
},
set(newZoomFactor) {
this.setZoomFactor(newZoomFactor);
}
}
});
}
// (re)create needed canvases
View.prototype.createCanvases = function () {
let imageCanvas = this.aladinDiv.querySelector('.aladin-imageCanvas');
if (imageCanvas) {
imageCanvas.remove();
}
/*let gridCanvas = this.aladinDiv.querySelector('.aladin-gridCanvas');
if (gridCanvas) {
gridCanvas.remove();
}*/
let catalogCanvas = this.aladinDiv.querySelector('.aladin-catalogCanvas')
if (catalogCanvas) {
catalogCanvas.remove();
}
// canvas to draw the images
let createCanvas = (name) => {
// Create a new canvas element
let canvas = document.createElement('canvas');
canvas.className = name;
// Append the canvas to the aladinDiv
this.aladinDiv.insertBefore(canvas, this.aladinDiv.firstChild);
return canvas;
};
this.catalogCanvas = createCanvas('aladin-catalogCanvas');
//this.gridCanvas = createCanvas('aladin-gridCanvas');
this.imageCanvas = createCanvas('aladin-imageCanvas');
};
View.prototype.setFoVRange = function(minFoV, maxFoV) {
this.wasm.setFoVRange(minFoV, maxFoV)
this.updateZoomState();
}
View.prototype.getFoVRange = function() {
let [minFoV, maxFoV] = this.wasm.getFoVRange();
if (minFoV == -1.0) {
minFoV = null;
}
if (maxFoV == -1.0) {
maxFoV = null;
}
return [minFoV, maxFoV]
}
// called at startup and when window is resized
// The WebGL backend is resized
View.prototype.fixLayoutDimensions = function () {
// make de line height at 0. This prevents the resize observer to infinitely
// trigger over and over.
this.aladinDiv.style.setProperty('line-height', 0);
Utils.cssScale = undefined;
var computedWidth = Math.floor(parseFloat(this.aladinDiv.getBoundingClientRect().width)) || 1.0;
var computedHeight = Math.floor(parseFloat(this.aladinDiv.getBoundingClientRect().height)) || 1.0;
this.width = Math.max(computedWidth, 1);
this.height = Math.max(computedHeight, 1); // this prevents many problems when div size is equal to 0
this.cx = this.width / 2;
this.cy = this.height / 2;
this.largestDim = Math.max(this.width, this.height);
this.smallestDim = Math.min(this.width, this.height);
this.ratio = this.largestDim / this.smallestDim;
this.mouseMoveIncrement = 160 / this.largestDim;
// reinitialize 2D context
this.catalogCtx = this.catalogCanvas.getContext("2d");
this.catalogCtx.canvas.width = this.width * window.devicePixelRatio;
this.catalogCtx.canvas.height = this.height * window.devicePixelRatio;
this.catalogCtx.canvas.style.width = this.width + "px";
this.catalogCtx.canvas.style.height = this.height + "px";
this.catalogCtx.scale(window.devicePixelRatio, window.devicePixelRatio);
this.imageCtx = this.imageCanvas.getContext("webgl2");
this.imageCtx.canvas.style.width = this.width + "px";
this.imageCtx.canvas.style.height = this.height + "px";
this.debounceResize();
pixelateCanvasContext(this.imageCtx, this.aladin.options.pixelateCanvas);
// change logo
if (!this.logoDiv) {
this.logoDiv = this.aladinDiv.querySelector('.aladin-logo');
}
if (this.logoDiv) {
if (this.width > 800) {
this.logoDiv.classList.remove('aladin-logo-small');
this.logoDiv.classList.add('aladin-logo-large');
this.logoDiv.style.width = '90px';
}
else {
this.logoDiv.classList.add('aladin-logo-small');
this.logoDiv.classList.remove('aladin-logo-large');
this.logoDiv.style.width = '32px';
}
}
this.computeNorder();
this.aladinDiv.style.removeProperty('line-height');
this.throttledDivResized();
};
var pixelateCanvasContext = function (ctx, pixelateFlag) {
var enableSmoothing = !pixelateFlag;
ctx.imageSmoothingEnabled = enableSmoothing;
ctx.webkitImageSmoothingEnabled = enableSmoothing;
ctx.mozImageSmoothingEnabled = enableSmoothing;
ctx.msImageSmoothingEnabled = enableSmoothing;
ctx.oImageSmoothingEnabled = enableSmoothing;
}
View.prototype.startSelection = function(mode, callback) {
this.selector.start(mode, callback);
}
View.prototype.setMode = function (mode) {
this.mode = mode;
if (this.mode == View.TOOL_SIMBAD_POINTER) {
this.aladin.popup.hide();
this.catalogCanvas.style.cursor = '';
this.catalogCanvas.classList.add('aladin-sp-cursor');
}
else if (this.mode == View.PAN) {
this.setCursor('default');
}
else if (this.mode == View.SELECT) {
this.setCursor('crosshair');
this.aladin.showReticle(false)
}
ALEvent.MODE.dispatchedTo(this.aladin.aladinDiv, {mode});
};
View.prototype.setCursor = function (cursor) {
if (this.catalogCanvas.style.cursor == cursor) {
return;
}
this.catalogCanvas.style.cursor = cursor;
};
View.prototype.getCanvas = async function (imgType, width, height, withLogo=true) {
const loadImage = function (url) {
return new Promise((resolve, reject) => {
const image = document.createElement("img")
image.src = url
image.onload = () => resolve(image)
image.onerror = () => reject(new Error('could not load image'))
})
}
imgType = imgType || "image/png";
const canvas = this.wasm.canvas();
const c = document.createElement('canvas');
c.width = width || (this.width * window.devicePixelRatio);
c.height = height || (this.height * window.devicePixelRatio);
const ctx = c.getContext('2d');
ctx.drawImage(canvas, 0, 0, c.width, c.height);
ctx.drawImage(this.catalogCanvas, 0, 0, c.width, c.height);
// draw the reticle if it is on the view
let reticle = this.aladin.reticle;
if (reticle.isVisible()) {
var svgBlob = new Blob([reticle.el.innerHTML], {type: 'image/svg+xml;charset=utf-8'});
const reticleImg = await loadImage(URL.createObjectURL(svgBlob));
const posX = (c.width - reticleImg.width)/2.0;
const posY = (c.height - reticleImg.height)/2.0;
ctx.drawImage(reticleImg, posX, posY);
}
if(withLogo) {
const logo = await loadImage("data:image/png;base64,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")
const offX = c.width - logo.width;
const offY = c.height - logo.height;
ctx.drawImage(logo, offX, offY);
}
return c;
}
/**
* Return dataURL string corresponding to the current view
*/
View.prototype.getCanvasDataURL = async function (imgType, width, height, withLogo=true) {
const c = await this.getCanvas(imgType, width, height, withLogo);
return c.toDataURL(imgType);
};
/**
* Return ArrayBuffer corresponding to the current view
*/
View.prototype.getCanvasArrayBuffer = async function (imgType, width, height, withLogo=true) {
const c = await this.getCanvas(imgType, width, height, withLogo);
return new Promise((resolve, reject) => {
c.toBlob(blob => {
if (blob) {
const reader = new FileReader();
reader.onloadend = () => resolve(reader.result);
reader.onerror = () => reject(new Error('Error reading blob as ArrayBuffer'));
reader.readAsArrayBuffer(blob);
} else {
reject(new Error('Canvas toBlob failed'));
}
}, imgType);
});
}
/**
* Return Blob corresponding to the current view
*/
View.prototype.getCanvasBlob = async function (imgType, width, height, withLogo=true) {
const c = await this.getCanvas(imgType, width, height, withLogo);
return new Promise((resolve, reject) => {
c.toBlob(blob => {
if (blob) {
resolve(blob);
} else {
reject(new Error('Canvas toBlob failed'));
}
});
});
}
View.prototype.selectLayer = function (layer) {
if (!this.imageLayers.has(layer)) {
console.warn(layer + ' does not exists. So cannot be selected');
return;
}
this.selectedLayer = layer;
};
var createListeners = function (view) {
if ('virtualKeyboard' in navigator) {
// The VirtualKeyboard API is supported!
navigator.virtualKeyboard.overlaysContent = true;
}
// various listeners
let onDblClick = function (e) {
const xymouse = Utils.relMouseCoords(e);
// deselect all the selected sources with Select panel
view.unselectObjects();
try {
const [lon, lat] = view.aladin.pix2world(xymouse.x, xymouse.y, 'icrs');
view.pointTo(lon, lat);
// reset the rotation around center view
view.setRotation(0.0);
}
catch (err) {
return;
}
};
if (!Utils.hasTouchScreen()) {
Utils.on(view.catalogCanvas, 'dblclick', onDblClick);
}
// prevent default context menu from appearing (potential clash with right-click cuts control)
Utils.on(view.catalogCanvas, "contextmenu", function (e) {
// do something here...
e.preventDefault();
if(view.aladin.contextMenu) {
e.stopPropagation();
}
});
let cutMinInit = null
let cutMaxInit = null;
var onlongtouch = function(e) {
if (view.aladin.statusBar) {
view.aladin.statusBar.removeMessage('opening-ctxmenu')
}
view.aladin.contextMenu && view.aladin.contextMenu.show({e});
};
var longTouchTimer;
var longTouchDuration = 800;
var showContextMenu = true;
var xystart;
var handleSelect = function(xy, tolerance) {
tolerance = tolerance || 5;
var objs = view.closestObjects(xy.x, xy.y, tolerance);
view.unselectObjects();
if (objs) {
var objClickedFunction = view.aladin.callbacksByEventName['objectClicked'];
var footprintClickedFunction = view.aladin.callbacksByEventName['footprintClicked'];
let objsByCats = {};
let shapes = [];
for (let o of objs) {
// classify the different objects by catalog
let cat = o.getCatalog && o.getCatalog();
if (cat && cat.name) {
if (!objsByCats[cat.name]) {
objsByCats[cat.name] = []
}
objsByCats[cat.name].push(o);
}
(typeof objClickedFunction === 'function') && objClickedFunction(o, xy);
if (o.isFootprint()) {
if (typeof footprintClickedFunction === 'function') {
footprintClickedFunction(o, xy);
}
}
// If this shape has a catalog then it will be selected from its source
// so we will not add it
if (!cat) {
shapes.push(o);
}
}
// Rewrite objs
objs = Array.from(Object.values(objsByCats));
// Add the external shapes (i.e. which are not associated with catalog sources e.g. those from GraphicOverlay)
if (shapes.length > 0) {
objs.push(shapes)
}
view.selectObjects(objs);
view.lastClickedObject = objs;
} else {
// If there is a past clicked object
if (view.lastClickedObject) {
// TODO: do we need to keep that triggering ?
var objClickedFunction = view.aladin.callbacksByEventName['objectClicked'];
(typeof objClickedFunction === 'function') && objClickedFunction(null, xy);
view.lastClickedObject = null;
}
}
}
var touchStartTime;
Utils.on(view.catalogCanvas, "mousedown touchstart", function (e) {
e.preventDefault();
e.stopPropagation();
const xymouse = Utils.relMouseCoords(e);
ALEvent.CANVAS_EVENT.dispatchedTo(view.aladinDiv, {
state: {
mode: view.mode,
dragging: view.dragging,
rightClickPressed: view.rightClick
},
type: e.type,
xy: xymouse,
});
xystart = xymouse;
if (e.which === 3 || e.button === 2) {
view.rightClick = true;
showContextMenu = true;
if (view.selectedLayer) {
const imageLayer = view.imageLayers.get(view.selectedLayer);
if (imageLayer) {
// Take as start cut values what is inside the properties
// If the cuts are not defined in the metadata of the survey
// then we take what has been defined by the user
[cutMinInit, cutMaxInit] = imageLayer.getCuts();
}
}
return;
}
// detect long touch
if (e.type === 'touchstart' && e.targetTouches && e.targetTouches.length == 1) {
if (view.aladin.statusBar) {
view.aladin.statusBar.appendMessage({
id: 'opening-ctxmenu',
message: 'Opening menu...',
duration: 'unlimited',
offsetTimeDisplay: 200, // in ms
type: 'loading'
})
}
longTouchTimer = setTimeout(() => {onlongtouch(e); view.dragging = false;}, longTouchDuration);
touchStartTime = Date.now();
}
// zoom pinching
if (e.type === 'touchstart' && e.targetTouches && e.targetTouches.length >= 2) {
view.dragging = false;
// Do not start the pinched rotation if the north up is locked
if (view.aladin.lockNorthUp === true) {
return;
}
view.pinchZoomParameters.isPinching = true;
view.pinchZoomParameters.initialZoomFactor = view.zoomFactor;
view.pinchZoomParameters.initialDistance = Math.sqrt(Math.pow(e.targetTouches[0].clientX - e.targetTouches[1].clientX, 2) + Math.pow(e.targetTouches[0].clientY - e.targetTouches[1].clientY, 2));
view.fingersRotationParameters.initialViewAngleFromCenter = view.wasm.getViewCenter2NorthPoleAngle();
view.fingersRotationParameters.initialFingerAngle = Math.atan2(e.targetTouches[1].clientY - e.targetTouches[0].clientY, e.targetTouches[1].clientX - e.targetTouches[0].clientX) * 180.0 / Math.PI;
return;
}
view.dragCoo = xymouse;
view.dragging = true;
view.aladin.contextMenu && view.aladin.contextMenu._hide()
if (view.mode === View.PAN) {
view.setCursor('move');
}
view.wasm.pressLeftMouseButton();
if (view.mode === View.SELECT) {
view.selector.dispatch('mousedown', {coo: xymouse})
}
// false disables default browser behaviour like possibility to touch hold for context menu.
// To disable text selection use css user-select: none instead of putting this value to false
return true;
});
Utils.on(view.catalogCanvas, "mouseup", function (e) {
e.preventDefault();
e.stopPropagation();
const xymouse = Utils.relMouseCoords(e);
ALEvent.CANVAS_EVENT.dispatchedTo(view.aladinDiv, {
state: {
mode: view.mode,
dragging: view.dragging,
rightClickPressed: view.rightClick
},
xy: xymouse,
ev: e,
});
if (view.rightClick) {
if (showContextMenu) {
view.aladin.contextMenu && view.aladin.contextMenu.show({e});
}
view.rightClick = false;
return;
}
if (view.mode === View.SELECT) {
view.selector.dispatch('mouseup', {coo: xymouse})
}
});
// reacting on 'click' rather on 'mouseup' is more reliable when panning the view
Utils.on(view.catalogCanvas, "click mouseout touchend touchcancel", function (e) {
const xymouse = Utils.relMouseCoords(e);
ALEvent.CANVAS_EVENT.dispatchedTo(view.aladinDiv, {
state: {
mode: view.mode,
dragging: view.dragging,
rightClickPressed: view.rightClick
},
type: e.type,
ev: e,
});
if (e.type === 'touchend' || e.type === 'touchcancel') {
if (longTouchTimer) {
if (view.aladin.statusBar) {
view.aladin.statusBar.removeMessage('opening-ctxmenu')
}
clearTimeout(longTouchTimer)
longTouchTimer = undefined;
}
}
if ((e.type === 'touchend' || e.type === 'touchcancel') && view.pinchZoomParameters.isPinching) {
view.pinchZoomParameters.isPinching = false;
view.pinchZoomParameters.initialZoomFactor = view.pinchZoomParameters.initialDistance = undefined;
return;
}
if ((e.type === 'touchend' || e.type === 'touchcancel') && view.fingersRotationParameters.rotationInitiated) {
view.fingersRotationParameters.initialViewAngleFromCenter = undefined;
view.fingersRotationParameters.initialFingerAngle = undefined;
view.fingersRotationParameters.rotationInitiated = false;
return;
}
var wasDragging = view.realDragging === true;
if (view.dragging) { // if we were dragging, reset to default cursor
if(view.mode === View.PAN) {
view.setCursor('default');
}
view.dragging = false;
if (wasDragging) {
view.realDragging = false;
// call the positionChanged once more with a dragging = false
view.throttledPositionChanged(false);
}
} // end of "if (view.dragging) ... "
view.mustClearCatalog = true;
view.dragCoo = null;
if (e.type === "mouseout" || e.type === "touchend" || e.type === "touchcancel") {
if (e.type === "mouseout" || e.type === "touchcancel") {
if (view.mode === View.SELECT) {
view.selector.dispatch('mouseout', {coo: xymouse, e})
}
return;
}
if (e.type === "touchend") {
if (view.mode === View.SELECT) {
view.selector.dispatch('mouseup', {coo: xymouse})
return;
}
}
}
if (view.mode == View.TOOL_SIMBAD_POINTER) {
// call Simbad pointer or Planetary features
GenericPointer(view, e);
return; // when in TOOL_SIMBAD_POINTER mode, we do not call the listeners
}
// popup to show ?
if (!wasDragging || e.type === "touchend") {
if (e.type === "touchend") {
if (e.targetTouches && e.targetTouches.length == 0) {
// Check if the user moved a lot or not
// maybe check the time between the last touch start
const elapsedTime = Date.now() - touchStartTime;
if (elapsedTime < 100) {
view.updateObjectsLookup();
handleSelect(xymouse, 15);
}
}
} else {
handleSelect(xymouse);
}
}
// call listener of 'click' event
var onClickFunction = view.aladin.callbacksByEventName['click'];
if (typeof onClickFunction === 'function') {
var pos = view.aladin.pix2world(xymouse.x, xymouse.y, "icrs");
if (pos !== undefined) {
onClickFunction({ ra: pos[0], dec: pos[1], x: xymouse.x, y: xymouse.y, isDragging: wasDragging });
}
}
// TODO : remplacer par mecanisme de listeners
// on avertit les catalogues progressifs
view.refreshProgressiveCats();
//view.requestRedraw();
view.wasm.releaseLeftButtonMouse();
if (view.mode === View.SELECT && e.type === "click") {
view.selector.dispatch('click', {coo: xymouse})
}
});
var lastHoveredObject; // save last object hovered by mouse
var lastMouseMovePos = null;
Utils.on(view.catalogCanvas, "mousemove touchmove", function (e) {
e.preventDefault();
const xymouse = Utils.relMouseCoords(e);
ALEvent.CANVAS_EVENT.dispatchedTo(view.aladinDiv, {
state: {
mode: view.mode,
dragging: view.dragging,
rightClickPressed: view.rightClick
},
type: e.type,
xy: xymouse,
});
let dist;
if (xystart) {
dist = (xymouse.x - xystart.x)*(xymouse.x - xystart.x) + (xymouse.y - xystart.y)*(xymouse.y - xystart.y);
}
if (e.type === 'touchmove' && xystart) {
if (longTouchTimer && dist > 100) {
if (view.aladin.statusBar) {
view.aladin.statusBar.removeMessage('opening-ctxmenu')
}
clearTimeout(longTouchTimer)
longTouchTimer = undefined;
}
}
if (view.rightClick) {
var onRightClickMoveFunction = view.aladin.callbacksByEventName['rightClickMove'];
if (typeof onRightClickMoveFunction === 'function') {
onRightClickMoveFunction(xymouse.x, xymouse.y);
// do not process further
return;
}
if (dist < 100) {
return;
}
showContextMenu = false;
if(view.selectedLayer) {
let selectedLayer = view.imageLayers.get(view.selectedLayer);
// We try to match DS9 contrast adjustment behaviour with right click
const cs = {
x: view.catalogCanvas.clientWidth * 0.5,
y: view.catalogCanvas.clientHeight * 0.5,
};
const cx = (xymouse.x - cs.x) / view.catalogCanvas.clientWidth;
const cy = -(xymouse.y - cs.y) / view.catalogCanvas.clientHeight;
const offset = (cutMaxInit - cutMinInit) * cx;
const lr = offset + (1.0 - 2.0 * cy) * cutMinInit;
const rr = offset + (1.0 + 2.0 * cy) * cutMaxInit;
if (lr <= rr) {
selectedLayer.setCuts(lr, rr)