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osd-heatmap-overlay.js
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osd-heatmap-overlay.js
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//osd-heatmap-overlay.js
/**
* @constructor
* OpenSeadragon heatmap Plugin 0.0.1.
* A OpenSeadragon plugin that provides a way to show 'heatmap' overlays.
* @param {Object} options
* Allows configurable properties to be entirely specified by passing an options object to the constructor.
* @param {Object} options.data
* The data of heatmap
* etc.
* data:[
* [x,y,p1,p2,p3...],
* [x,y,p1,p2,p3...]
* ...]
* explanation:
* <x,y> is the position of the top-left point of a patch.
* p1,p2,p3 ... are the probabilities that is the corresponding fields.
* @param {Array} options.fields
* the array that each element describes the field of heatmap
* @param {String} options.fields.name
* the name of a field
* @param {Array} options.fields.range
* the range of a field - [min, max] in the field
* @param {Array} [options.fields.thresholds]
* the threshold of a field.
* @param {Array} options.size
* the size of patches - size:[width,height]
* @param {Array} [options.intervalTime=300]
* the delay time that will update the heatmap when the view changed. default time is 300 milliseconds.
* @param {Number} [opacity=0.8]
* the opacity of the heatmap. default is 0.8.
* @param {String} [color='#1034A6']
* the patch's color. default is '#1034A6'.
* @param {Number} [zIndex=100]
* the z-index of heatmap in the entire viewport.
*/
(function($) {
if (!$) {
$ = require("openseadragon");
if (!$) {
throw new Error("OpenSeadragon is missing.");
}
}
// check version
if (!$.version || $.version.major < 2) {
throw new Error(
"This version of OpenSeadragonScalebar requires " +
"OpenSeadragon version 2.2.0+"
);
}
$.Viewer.prototype.createHeatmap = function(options) {
if (!this.heatmap) {
options = options || {};
options.viewer = this;
this.heatmap = new $.Heatmap(options);
} else {
this.heatmap.updateOptions(options);
}
};
$.Heatmap = function(options) {
this._viewer = options.viewer;
// validate data model
if (!_validate(options)) {
return;
}
// heatmap data model
// necessary Options
//
this._data = options.data || [];
this._editedData = options.editedData || [];
this.mode = options.mode || "binal";
this._fields = createFields(options.fields);
this._size = options.size;
this._steps = options.steps || 3;
this._t_data = null;
this._operator = "AND";
this._currentField = options.currentField || this._fields[0];
if (
options.currentFieldName &&
this._fields.find(f => f.name === options.currentFieldName)
) {
this._currentField = this._fields.find(
f => f.name === options.currentFieldName
);
}
this._color = options.color || "#045a8d"; // heatmap color
this._colors = options.colors || ["#edf8e9", "#006d2c"]; // heatmap color
this.intervals = _getIntervals(
this._currentField,
this._colors,
this._steps
);
// filter the data
//this.__thresholdingData();
// set default options' values if no corresponding values.
this._offset = [null, null];
this._interval = null;
this._intervalTime = options.intervalTime || 300;
this.events = {
updateView: this.updateView.bind(this),
zooming: this._zooming.bind(this),
panning: this._panning.bind(this)
};
// -- create cover div -- //
this._cover_div = document.createElement("div");
if (!options.hasCover) this._cover_div.style.display = "none";
this._cover_div.style.position = "absolute";
this._cover_div.style.width = "150%";
this._cover_div.style.height = "150%";
this._cover_div.style.background = options.coverColor || "#000000";
this._cover_div.style.zIndex = options.zIndex - 1 || 97;
this._cover_div.style.opacity = options.coverOpacity || 0.6;
this._viewer.canvas.appendChild(this._cover_div);
// create a container div and set the default attributes
this._div = document.createElement("div");
this._div.style.position = "absolute";
this._div.style.width = "150%";
this._div.style.height = "150%";
this._div.style.transformOrigin = "0 0";
this._div.style.transform = "scale(1,1)";
this._div.style.zIndex = options.zIndex || 98;
this._div.style.opacity = options.opacity || 0.8;
this._viewer.canvas.appendChild(this._div);
// create display_canvas
this._display_ = document.createElement("canvas");
this._display_.style.position = "absolute";
this._display_.style.top = 0;
this._display_.style.left = 0;
this._display_ctx_ = this._display_.getContext("2d");
this._div.appendChild(this._display_);
// create a
this.__legend = document.createElement("div");
this.__legend.style.position = "absolute";
this.__legend.style.top = "50px";
this.__legend.style.right = 0;
this.__legend.style.padding = "6px 8px";
this.__legend.style.zIndex = options.zIndex + 1 || 99;
this.__legend.style.font = "14px/16px Arial, Helvetica, sans-serif";
this.__legend.style.fontSize = "14px";
this.__legend.style.lineHeight = "16px";
this.__legend.style.fontFamily = "Arial, Helvetica, sans-serif";
this.__legend.style.background = "rgb(255,255,255)";
this.__legend.style.boxShadow = "0 0 15px rgba(0,0,0,0.2)";
this.__legend.style.borderRadius = "5px";
// legend info
this.__legend_info = document.createElement("div");
// this.__legend_info.style.=''
this.__legend_info.style.textAlign = "left";
this.__legend_info.style.lineHeight = "20px";
this.__legend_info.style.color = "#555";
this.__legend_info.style.overflow = "hidden";
// btn to open/close legend
this.__legend_btn = document.createElement("div");
this.__legend_btn.classList.add("material-icons");
this.__legend_btn.classList.add("md-24");
this.__legend_btn.textContent = "keyboard_arrow_up";
this.__legend_btn.style.color = "#000";
this.__legend_btn.style.float = "right";
this.__legend_btn.style.cursor = "pointer";
this.__legend.appendChild(this.__legend_btn);
this.__legend.appendChild(this.__legend_info);
this._viewer.canvas.appendChild(this.__legend);
this.__legend_btn.addEventListener(
"click",
function(e) {
if (this.__legend_btn.textContent == "keyboard_arrow_up") {
this.__legend_btn.textContent = "keyboard_arrow_down";
this.__legend_info.style.width = 0;
this.__legend_info.style.height = 0;
} else {
this.__legend_btn.textContent = "keyboard_arrow_up";
this.__legend_info.style.width = "";
this.__legend_info.style.height = "";
}
}.bind(this)
);
this.__legend.style.display = "none";
this._isOn = false;
// turn on the heatmap
this.on();
// get the position of the current center points
this._center = this._viewer.viewport.getCenter(true);
};
$.Heatmap.prototype = {
updateOptions: function(options) {
// validate data model
if (!_validate(options)) {
return;
}
// heatmap data model
// necessary Options
this._data = options.data || this._data;
this._editedData = options.editedData || this._editedData;
this.mode = options.mode || this.mode; // two modes - 'binal' : 'gradient'
this._fields = options.fields
? createFields(options.fields)
: this._fields;
this._size = options.size || this._size;
this._steps = options.steps || this._steps;
// set default options' values if no corresponding values.
this._currentField = options.currentField || this._currentField;
if (
options.currentFieldName &&
this._fields.find(f => f.name === options.currentFieldName)
) {
this._currentField = this._fields.find(
f => f.name === options.currentFieldName
);
}
this._color = options.color || this._color || "#006d2c";
this._colors = options.colors || ["#FFFFFF", "#1034A6"];
this.intervals = _getIntervals(
this._currentField,
this._colors,
this._steps
);
this._offset = [null, null];
this._interval = null;
this._intervalTime = options.intervalTime || 300;
this.events = {
updateView: this.updateView.bind(this),
zooming: this._zooming.bind(this),
panning: this._panning.bind(this)
};
// -- create container div and display canvas -- //
if (!options.hasCover) this._cover_div.style.display = "none";
if (options.coverColor)
this._cover_div.style.background = options.coverColor;
this._cover_div.style.zIndex = options.zIndex - 1 || 97;
if (options.coverOpacity)
this._cover_div.style.opacity = options.coverOpacity;
// create a container div and set the default attributes
//this._div = document.createElement( 'div');
this._div.style.position = "absolute";
this._div.style.width = "150%";
this._div.style.height = "150%";
this._div.style.transformOrigin = "0 0";
this._div.style.transform = "scale(1,1)";
this._div.style.zIndex = options.zIndex || 98;
this._div.style.opacity = options.opacity || 0.6;
//this._viewer.canvas.appendChild(this._div);
// create display_cancavs
//this._display_ = document.createElement('canvas');
this._display_.style.position = "absolute";
this._display_.style.top = 0;
this._display_.style.left = 0;
this._display_ctx_ = this._display_.getContext("2d");
//this._div.appendChild(this._display_);
this._isOn = false;
// turn on the heatmap
this.on();
// get the position of the current center points
this._center = this._viewer.viewport.getCenter(true);
},
/**
* display the cover of heatmap
*/
coverOn: function() {
this._cover_div.style.display = "";
},
/**
* hide the cover of heatmap
*/
coverOff: function() {
this._cover_div.style.display = "none";
},
/**
* set the opacity of heatmap's cover
* @param {Number} opacity the value of opacity
*/
setCoverOpacity: function(opacity) {
if (opacity < 0 || opacity > 1) {
console.warn("Heatmap.setsetCoverOpacity: Invalid Opacity");
return;
}
this._cover_div.style.opacity = opacity;
},
/**
* set the color of heatmap's cover
* @param {String} color color in Hex form
*/
setCoverColor: function(color) {
this._cover_div.style.background = color;
},
/**
* turn on the heatmap
*/
on: function() {
if (this._isOn) return;
// show heatmap
this._div.style.display = "";
// add events
this._viewer.addHandler("resize", this.events.updateView);
this._viewer.addHandler("pan", this.events.panning);
this._viewer.addHandler("zoom", this.events.zooming);
this._viewer.addHandler("animation-finish", this.events.updateView);
// draw heatmap immediately
this.updateView(0);
// show legend if mode is
createLegend(this.__legend_info, this.intervals);
if (this.mode == "gradient") {
this.__legend.style.display = "";
} else {
this.__legend.style.display = "none";
}
// set on/off flag to true
this._isOn = true;
},
/**
* turn off the heatmap
*/
off: function() {
if (!this._isOn) return;
// remove events
this._viewer.removeHandler("resize", this.events.updateView);
this._viewer.removeHandler("pan", this.events.panning);
this._viewer.removeHandler("zoom", this.events.zooming);
this._viewer.removeHandler("animation-finish", this.events.updateView);
// hidden heatmap
this._div.style.display = "none";
this.__legend.style.display = "none";
// set on/off flag to false
this._isOn = false;
},
setCurrentField: function(name, draw = true) {
const field = this._fields.find(f => f.name === name);
if (field) {
this._currentField = field;
createLegend(this.__legend_info, this.intervals);
if (draw) this.drawOnCanvas();
}
},
updateLegend: function() {
createLegend(this.__legend_info, this.intervals);
},
/**
* set Threshold by field's name
* @param {String} name
* field's name
* @param {Number} value
* field's threshold
*/
setThresholdsByName: function(name, min, max, draw = true) {
const field = this._fields.find(f => f.name === name);
if (field) {
field.setThresholds(min, max);
createLegend(this.__legend_info, this.intervals);
if (draw) this.drawOnCanvas();
}
},
/**
* set Threshold by field's index
* @param {Integer} index
* field's index
* @param {Number} value
* field's threshold
*/
setThresholdsByIndex: function(index, min, max) {
const field = this._fields[index];
if (field) {
field.setThresholds(min, max);
//this.__thresholdingData();
this.drawOnCanvas();
createLegend(this.__legend_info, this.intervals);
}
},
/**
* filter the data according to the threstholds.
*/
__thresholdingData: function() {
const thresholds = this._fields.map(f => f.value);
let t = TESTER[this._operator];
return this._data.filter(d => {
const p = d.slice(2);
return t.call(this, p, thresholds, $.inTheRange);
}, this);
},
/**
* setOpacity
* set the opacity for the canvas div.
* @param {Number} num the value of the opacity
*/
setOpacity: function(num) {
// valid num [0 , 1]
if (1 < num || 0 > num) {
console.warn(`Heatmap.setOpacity: Invalid Opacity`);
return;
}
this._div.style.opacity = num;
},
/**
* change the mode of heatmap
* @param {String} mode 'binal' or 'gradient'
*/
changeMode: function(mode) {
if (this.mode == mode) return;
this.mode = mode;
if(this.mode == "gradient") {
this.__legend.style.display = "";
}else{
this.__legend.style.display = "none";
}
this.drawOnCanvas();
createLegend(this.__legend_info, this.intervals);
},
/**
* set the steps of heatmap for gradient mode
* @param {Integer} steps how many intervals for color gradients
*/
setSteps: function(steps) {
//if(!Number.isInteger(steps) || steps > 10 || steps < 3) return;
this._steps = steps;
// refresh view/heatmap/ui if the heatmap is in 'gradient' mode
if (this.mode == "gradient") {
this.drawOnCanvas();
createLegend(this.__legend_info, this.intervals);
}
},
/**
* set the color of heatmap
* @param {String} the color of the heatmap
*/
setColor: function(color) {
this._color = color;
// refresh view/heatmap/ui if the heatmap is in 'binal' mode
if (this.mode == "binal") this.drawOnCanvas();
},
/**
* set the colors of heatmap
* @param {Array} the list of colors for the color gradient heatmap
*/
setColors: function(colors) {
if (!Array.isArray(colors) || colors.length < 2) return;
this._colors = colors;
// refresh view/heatmap/ui if the heatmap is in 'gradient' mode
if (this.mode == "gradient") {
this.drawOnCanvas();
createLegend(this.__legend_info, this.intervals);
}
},
/**
* it will be called when viewport zooming.
* This method is for optimized UX.
*/
_zooming: function(e) {
// get the scaling original point on the screen
if (
!e.refPoint ||
e.zoom > this._viewer.viewport.getMaxZoom() ||
e.zoom < this._viewer.viewport.getMinZoom()
)
return;
if (e.refPoint === true) {
// get the current center to set as an referent point if there is no referent point
e.refPoint = this._viewer.viewport.getCenter(true);
}
// the referent point on the screen.
const viewerElement = this._viewer.viewport.viewportToViewerElementCoordinates(
e.refPoint
);
// get current zoom value.
var viewportZoom = this._viewer.viewport.getZoom();
var zoom = this._viewer.viewport.viewportToImageZoom(e.zoom);
// calculate the scaling value
var scale = viewportZoom / this._zoom;
// ignore scaling if the value to small
if (scale == 1 || Math.abs(1 - scale) < 0.01) return;
// scaling view
this._div.style.transformOrigin = `${this._offset[0] +
viewerElement.x}px ${this._offset[1] + viewerElement.y}px`;
this._div.style.transform = `scale(${scale},${scale})`;
},
/**
* it will be called when viewport panning.
* This method is for optimized UX.
*/
_panning: function(e) {
// delta distance/ the actual moving distance(normalized coordinate)
let dx = this._center.x - e.center.x;
let dy = this._center.y - e.center.y;
// convert distance form normalized/logical to screen/physical
const distance = this._viewer.viewport.deltaPixelsFromPoints(
new $.Point(dx, dy),
true
);
// ignore if moving distance too small
if (Math.abs(distance.x) < 0.01 && Math.abs(distance.y) < 0.01) return;
// transform the top and left position of the canvas div
let top = parseFloat(this._div.style.top);
let left = parseFloat(this._div.style.left);
// set transform position
this._div.style.top = `${top + distance.y}px`;
this._div.style.left = `${left + distance.x}px`;
this._center = e.center;
},
/**
* getViewBoundBox
* get the current bound box of the view in the normalized coordinate system.
* @return {Object} bbox which has x, y, width, height;
*/
getViewBoundBox: function() {
const { x, y } = this._viewer.imagingHelper._viewportOrigin;
const width = this._viewer.imagingHelper._viewportWidth;
const height = this._viewer.imagingHelper._viewportHeight;
return { x, y, width, height };
},
/**
* getCanvasBoundBox
* get the current bound box of the canvas in the normalized coordinate system.
* @return {Object} bbox which has x, y, width, height;
*/
getCanvasBoundBox: function() {
const x = this._viewer.imagingHelper.physicalToLogicalX(-this._offset[0]);
const y = this._viewer.imagingHelper.physicalToLogicalY(-this._offset[1]);
const width = physicalToLogicalDistanceX(
this._viewer.canvas.clientWidth + 2 * this._offset[0],
this._viewer.imagingHelper
);
const height = physicalToLogicalDistanceY(
this._viewer.canvas.clientHeight + 2 * this._offset[1],
this._viewer.imagingHelper
);
return { x, y, width, height };
},
/**
* filter data by using the current view's bounding box.
* @param {Array} d
* data array
* @return {Boolean}
* true if
*/
viewBoundFilter: function(d) {
const x = d[0]; // left
const y = d[1]; // top
// current view's bounding box against a patch
return $.isIntersectBbox(this._getCanvasBoundBox, {
x: x,
y: y,
width: this._size[0],
height: this._size[1]
});
},
/**
* [filter description]
* @param {[type]} d [description]
* @return {[type]} [description]
*/
gradient: function(d) {
const x = d[0]; // left
const y = d[1]; // top
// current view's bounding box against a patch
return $.isIntersectBbox(this._getCanvasBoundBox, {
x: x,
y: y,
width: this._size[0],
height: this._size[1]
});
},
/**
* update view/heatmap
* @param {Number} the debounce time (in milliseconds) to draw
*/
updateView: function(time) {
time = isNaN(time) ? this._intervalTime : time;
clearTimeout(this._interval);
this._interval = setTimeout(
function() {
this.resize();
this.drawOnCanvas();
}.bind(this),
time
);
},
/**
* reset viewport and canvas css attributes if window resize or viewport changed
*/
resize: function() {
// resize the canvas size
this._display_.width = this._div.clientWidth;
this._display_.height = this._div.clientHeight;
// get the offset[x,y] in piexl
this._offset[0] =
(this._div.clientWidth - this._viewer.canvas.clientWidth) * 0.5;
this._offset[1] =
(this._div.clientHeight - this._viewer.canvas.clientHeight) * 0.5;
// set the current position for the canvas div
this._div.style.left = `${-this._offset[0]}px`;
this._div.style.top = `${-this._offset[1]}px`;
this._cover_div.style.left = `${-this._offset[0]}px`;
this._cover_div.style.top = `${-this._offset[1]}px`;
// reset the origin point and scale
this._div.style.transformOrigin = "0 0";
this._div.style.transform = "scale(1,1)";
// recording the current center and zoom
this._center = this._viewer.viewport.getCenter(true);
this._zoom = this._viewer.viewport.getZoom(true);
// get the current canvas bounding box under the normalized coordiante
this._getCanvasBoundBox = this.getCanvasBoundBox();
// TODO filter with view boundaries
//this._t_data = this.data.filter(this.viewBoundFilter,this);
},
/**
* According to the data, thresholds and the size of current screen, draw the heatmap
*/
drawOnCanvas: function() {
// filter data by using threshold values
let finalData = this._data.filter(this.viewBoundFilter, this);
// get the patch's size on the screen
const w = logicalToPhysicalDistanceX(
this._size[0],
this._viewer.imagingHelper
);
const h = logicalToPhysicalDistanceY(
this._size[1],
this._viewer.imagingHelper
);
// clear canvas before draw
DrawHelper.clearCanvas(this._display_);
if (this.mode === "binal") {
// filter by thresholds
finalData = this.__thresholdingData();
// set patch color
this._display_ctx_.fillStyle = this._color;
// get the patch's size on the screen
//const w = logicalToPhysicalDistanceX(this._size[0],this._viewer.imagingHelper);
//const h = logicalToPhysicalDistanceY(this._size[1],this._viewer.imagingHelper);
// start to draw each patch
this._display_ctx_.beginPath();
for (let i = 0; i < finalData.length; i++) {
let d = finalData[i];
// get the top-left point of a patch on the sreen
const x = this._viewer.imagingHelper.logicalToPhysicalX(d[0]);
const y = this._viewer.imagingHelper.logicalToPhysicalY(d[1]);
// draw patch
this._display_ctx_.rect(
x + this._offset[0],
y + this._offset[1],
w,
h
);
}
this._display_ctx_.fill();
} else if (this.mode === "gradient") {
this.intervals = _getIntervals(
this._currentField,
this._colors,
this._steps
);
const index =
this._fields.findIndex(
f => f.name === this._currentField.name,
this
) + 2;
let finalDatas = finalData.reduce((rs, d) => {
for (var i = 0; i < rs.length; i++) {
if (rs[i].range[0] <= d[index] && d[index] < rs[i].range[1]) {
rs[i].data.push(d);
//break;
return rs;
}
}
return rs;
}, this.intervals);
//const w = logicalToPhysicalDistanceX(this._size[0],this._viewer.imagingHelper);
//const h = logicalToPhysicalDistanceY(this._size[1],this._viewer.imagingHelper);
finalDatas.forEach(cluster => {
this._display_ctx_.fillStyle = cluster.color;
this._display_ctx_.beginPath();
cluster.data.forEach(d => {
const x = this._viewer.imagingHelper.logicalToPhysicalX(d[0]);
const y = this._viewer.imagingHelper.logicalToPhysicalY(d[1]);
// draw patch
this._display_ctx_.rect(
x + this._offset[0],
y + this._offset[1],
w,
h
);
}, this);
this._display_ctx_.fill();
}, this);
}
//draw edited data
if (this._editedData && Array.isArray(this._editedData.clusters))
this._editedData.clusters.forEach(cluster => {
const points = removeDeplicateAndLogicalToPhysical(
cluster.editDataArray.flat(),
this._viewer.imagingHelper
);
// clear
points.forEach(p => {
this._display_ctx_.clearRect(
p[0] + this._offset[0],
p[1] + this._offset[1],
w,
h
);
});
// color editedData
this._display_ctx_.fillStyle = cluster.color;
this._display_ctx_.beginPath();
points.forEach(p => {
this._display_ctx_.rect(
p[0] + this._offset[0],
p[1] + this._offset[1],
w,
h
);
});
this._display_ctx_.fill();
});
}
};
function removeDeplicateAndLogicalToPhysical(points, imagingHelper) {
const pointsObj = {};
points.forEach(p => {
pointsObj[`${p[0]}|${p[1]}`] = p;
});
const ps = [];
for (let key in pointsObj) {
const x = imagingHelper.logicalToPhysicalX(pointsObj[key][0]);
const y = imagingHelper.logicalToPhysicalY(pointsObj[key][1]);
ps.push([x, y]);
}
return ps;
}
function _getIntervals(field, colors = ["#FFFFFF", "#000000"], steps = 3) {
// get list of colors
//
// const colorList = interpolateColors(hexToRgb(colors[0]),hexToRgb(colors[1]),steps);
const colorList = ["#2b83ba", "#abdda4", "#ffffbf", "#fdae61", "#d7191c"];
//const colorList = ['#f2f0f7','#cbc9e2','#9e9ac8','#756bb1','#54278f'];
//const colorList = ['#eff3ff','#bdd7e7','#6baed6','#3182bd','#08519c'];
//const colorList = ['#fee5d9','#fcae91','#fb6a4a','#de2d26','#a50f15'];
// const colorList = ['#feedde','#fdbe85','#fd8d3c','#e6550d','#a63603'];
//const colorList = ['#edf8e9','#bae4b3','#74c476','#31a354','#006d2c'];
steps = 5;
// get a boundary list of intervals
const threstholds = field.value;
const boundaries = interpolateNums(
threstholds[0],
threstholds[1],
steps + 1
);
const rs = [];
for (let i = 0; i < colorList.length; i++) {
// create a new interval
rs.push({
color: colorList[i],
range: [boundaries[i], boundaries[i + 1]],
data: []
});
}
return rs;
}
/**
* validate heatmap's options
* @param {Object} options
* heatmap's options
* @return {Boolean}
* true if heatmap's options. Otherwise, false.
*/
function _validate(options) {
// check data
if (!Array.isArray(options.data)) {
console.error("Heatmap: options.data");
return false;
}
// check fields
if (!Array.isArray(options.fields)) {
console.error("Heatmap: options.fields");
return false;
}
// check size
if (!Array.isArray(options.size) || options.size.length !== 2) {
console.error("Heatmap: options.size");
return false;
}
return true;
}
var TESTER = {
AND: function(p, t, func) {
return p.reduce((acc, v, i) => {
return acc && func.call(this, v, t[i]);
}, true);
},
OR: function(p, t, func) {
return p.reduce((acc, v, i) => {
return acc || func.call(this, v, t[i]);
}, true);
},
FIELD: function(p, t, func) {
return func.call(
this,
p[this._currentField.index],
t[this._currentField.index]
);
}
};
/**
* @private
* compare p and t if all elements in p and the corresponding t pass the comparison function
* @param {Array} p [p1, p2, p3 ...]
* @param {Array} t [t1, t2, t3 ...]
* @param {Function} compare function
*
* @return true if all p and t pass the comparison function. Otherwise, false.
*/
function and(p, t, func) {
return p.reduce((acc, v, i) => {
return acc && func.call(this, v, t[i]);
}, true);
}
function or(p, t, func) {
return p.reduce((acc, v, i) => {
return acc || func.call(this, v, t[i]);
}, true);
}
/**
* @private
* covert object array to OpenSeadragon.Heatmap.Field array.
* @param {Array} fields
* each field should has the same data constructure.
* etc.[{
* name:'',
* range:[0,1],
* threshold:0.4
* }...]
*
* @return {OpenSeadragon.Heatmap.Field array} All fields
*
*/
function createFields(fields) {
return fields.map((d, index) => {
return new $.Heatmap.Field(d, index);
});
}
/**
* @private
* covert the distance from screen coordinate(in pixel) to normalized coordinate in x-axis.
* @param {Number} width/the distance in x-axis.
* @param {OpenSeadragon.ImagingHelper} helper
*
* @return {Number}
* width/the distance in the normalized/Logical coordinate.
*/
function physicalToLogicalDistanceX(width, helper) {
return helper._haveImage
? (width / helper.getViewerContainerSize().x) * helper._viewportWidth
: 0;
}
/**
* @private
* covert the distance from screen coordinate(in pixel) to normalized coordinate in y-axis.
* @param {Number} width/the distance in y-axis.
* @param {OpenSeadragon.ImagingHelper} helper
*
* @return {Number}
* width/the distance in the normalized/Logical coordinate.
*/
function physicalToLogicalDistanceY(height, helper) {
return helper._haveImage
? (height / helper.getViewerContainerSize().y) * helper._viewportHeight
: 0;
}
/**
* @private
* covert the distance from normalized coordinate to screen coordinate(in pixel) in x-axis.
* @param {Number} width/the distance in x-axis.
* @param {OpenSeadragon.ImagingHelper} helper
*
* @return {Number}
* width/the distance in the Screen/Physical coordinate.
*/
function logicalToPhysicalDistanceX(width, helper) {
return helper._haveImage
? (width / helper._viewportWidth) * helper.getViewerContainerSize().x
: 0;
}
/**
* @private
* covert the distance from normalized coordinate to screen coordinate(in pixel) in y-axis.
* @param {Number} width/the distance in y-axis.
* @param {OpenSeadragon.ImagingHelper} helper
*
* @return {Number}
* width/the distance in the Screen/Physical coordinate.
*/
function logicalToPhysicalDistanceY(height, helper) {
return helper._haveImage
? (height / helper._viewportHeight) * helper.getViewerContainerSize().y
: 0;
}
$.extend($.Heatmap.prototype, $.EventSource.prototype);
/**
* [uity function] does two bounding boxes intersect
* example of a bounding box:
* {
* x: the position of the most left point,
* y: the position of the most top point,
* width: the width of the box,
* height: the height of the box
* }
*
* @param {bbox} bbox1
* A bounding box1
* @param {bbox} bbox2
* A bounding box2
*
* @return {Boolean}
* return true if only if two bounding boxes intersect; otherwise, false.
*/
$.isIntersectBbox = function(bbox1, bbox2) {
return (