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Fix detecting changed events #9050

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merged 3 commits into from May 10, 2021
Merged

Fix detecting changed events #9050

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f12c076
Fix detecting changed events
joshkel May 7, 2021
3e31475
Use a separate object for responsive listeners
joshkel May 7, 2021
af8c60f
Code review feedback
joshkel May 10, 2021
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107 changes: 67 additions & 40 deletions src/core/core.controller.js
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Expand Up @@ -116,8 +116,9 @@ class Chart {
this.chartArea = undefined;
this._active = [];
this._lastEvent = undefined;
/** @type {{attach?: function, detach?: function, resize?: function}} */
this._listeners = {};
/** @type {?{attach?: function, detach?: function, resize?: function}} */
this._responsiveListeners = undefined;
this._sortedMetasets = [];
this.scales = {};
this.scale = undefined;
Expand Down Expand Up @@ -483,8 +484,8 @@ class Chart {
const existingEvents = new Set(Object.keys(me._listeners));
const newEvents = new Set(me.options.events);

if (!setsEqual(existingEvents, newEvents)) {
// The events array has changed. Rebind it
if (!setsEqual(existingEvents, newEvents) || !!this._responsiveListeners !== me.options.responsive) {
// The configured events have changed. Rebind.
me.unbindEvents();
me.bindEvents();
}
Expand Down Expand Up @@ -894,6 +895,18 @@ class Chart {
* @private
*/
bindEvents() {
this.bindUserEvents();
if (this.options.responsive) {
this.bindResponsiveEvents();
} else {
this.attached = true;
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}
}

/**
* @private
*/
bindUserEvents() {
const me = this;
const listeners = me._listeners;
const platform = me.platform;
Expand All @@ -902,53 +915,66 @@ class Chart {
platform.addEventListener(me, type, listener);
listeners[type] = listener;
};
const _remove = (type, listener) => {
if (listeners[type]) {
platform.removeEventListener(me, type, listener);
delete listeners[type];
}
};

let listener = function(e, x, y) {
const listener = function(e, x, y) {
e.offsetX = x;
e.offsetY = y;
me._eventHandler(e);
};

each(me.options.events, (type) => _add(type, listener));
}

if (me.options.responsive) {
listener = (width, height) => {
if (me.canvas) {
me.resize(width, height);
}
};
/**
* @private
*/
bindResponsiveEvents() {
const me = this;
if (!me._responsiveListeners) {
me._responsiveListeners = {};
}
const listeners = me._responsiveListeners;
const platform = me.platform;

let detached; // eslint-disable-line prefer-const
const attached = () => {
_remove('attach', attached);
const _add = (type, listener) => {
platform.addEventListener(me, type, listener);
listeners[type] = listener;
};
const _remove = (type, listener) => {
if (listeners[type]) {
platform.removeEventListener(me, type, listener);
delete listeners[type];
}
};

me.attached = true;
me.resize();
const listener = (width, height) => {
if (me.canvas) {
me.resize(width, height);
}
};

_add('resize', listener);
_add('detach', detached);
};
let detached; // eslint-disable-line prefer-const
const attached = () => {
_remove('attach', attached);

detached = () => {
me.attached = false;
me.attached = true;
me.resize();

_remove('resize', listener);
_add('attach', attached);
};
_add('resize', listener);
_add('detach', detached);
};

if (platform.isAttached(me.canvas)) {
attached();
} else {
detached();
}
detached = () => {
me.attached = false;

_remove('resize', listener);
_add('attach', attached);
};

if (platform.isAttached(me.canvas)) {
attached();
} else {
me.attached = true;
detached();
}
}

Expand All @@ -957,15 +983,16 @@ class Chart {
*/
unbindEvents() {
const me = this;
const listeners = me._listeners;
if (!listeners) {
return;
}

each(me._listeners, (listener, type) => {
me.platform.removeEventListener(me, type, listener);
});
me._listeners = {};
each(listeners, (listener, type) => {

each(me._responsiveListeners, (listener, type) => {
me.platform.removeEventListener(me, type, listener);
});
me._responsiveListeners = undefined;
}

updateHoverStyle(items, mode, enabled) {
Expand Down