|
|
import * as util from './core/util';
|
|
|
import * as vec2 from './core/vector';
|
|
|
import Draggable from './mixin/Draggable';
|
|
|
import Eventful from './core/Eventful';
|
|
|
import * as eventTool from './core/event';
|
|
|
import {GestureMgr} from './core/GestureMgr';
|
|
|
import Displayable from './graphic/Displayable';
|
|
|
import {PainterBase} from './PainterBase';
|
|
|
import HandlerDomProxy, { HandlerProxyInterface } from './dom/HandlerProxy';
|
|
|
import { ZRRawEvent, ZRPinchEvent, ElementEventName, ElementEventNameWithOn, ZRRawTouchEvent } from './core/types';
|
|
|
import Storage from './Storage';
|
|
|
import Element, {ElementEvent} from './Element';
|
|
|
import CanvasPainter from './canvas/Painter';
|
|
|
import BoundingRect from './core/BoundingRect';
|
|
|
|
|
|
/**
|
|
|
* [The interface between `Handler` and `HandlerProxy`]:
|
|
|
*
|
|
|
* The default `HandlerProxy` only support the common standard web environment
|
|
|
* (e.g., standalone browser, headless browser, embed browser in mobild APP, ...).
|
|
|
* But `HandlerProxy` can be replaced to support more non-standard environment
|
|
|
* (e.g., mini app), or to support more feature that the default `HandlerProxy`
|
|
|
* not provided (like echarts-gl did).
|
|
|
* So the interface between `Handler` and `HandlerProxy` should be stable. Do not
|
|
|
* make break changes util inevitable. The interface include the public methods
|
|
|
* of `Handler` and the events listed in `handlerNames` below, by which `HandlerProxy`
|
|
|
* drives `Handler`.
|
|
|
*/
|
|
|
|
|
|
/**
|
|
|
* [DRAG_OUTSIDE]:
|
|
|
*
|
|
|
* That is, triggering `mousemove` and `mouseup` event when the pointer is out of the
|
|
|
* zrender area when dragging. That is important for the improvement of the user experience
|
|
|
* when dragging something near the boundary without being terminated unexpectedly.
|
|
|
*
|
|
|
* We originally consider to introduce new events like `pagemovemove` and `pagemouseup`
|
|
|
* to resolve this issue. But some drawbacks of it is described in
|
|
|
* https://github.com/ecomfe/zrender/pull/536#issuecomment-560286899
|
|
|
*
|
|
|
* Instead, we referenced the specifications:
|
|
|
* https://www.w3.org/TR/touch-events/#the-touchmove-event
|
|
|
* https://www.w3.org/TR/2014/WD-DOM-Level-3-Events-20140925/#event-type-mousemove
|
|
|
* where the the mousemove/touchmove can be continue to fire if the user began a drag
|
|
|
* operation and the pointer has left the boundary. (for the mouse event, browsers
|
|
|
* only do it on `document` and when the pointer has left the boundary of the browser.)
|
|
|
*
|
|
|
* So the default `HandlerProxy` supports this feature similarly: if it is in the dragging
|
|
|
* state (see `pointerCapture` in `HandlerProxy`), the `mousemove` and `mouseup` continue
|
|
|
* to fire until release the pointer. That is implemented by listen to those event on
|
|
|
* `document`.
|
|
|
* If we implement some other `HandlerProxy` only for touch device, that would be easier.
|
|
|
* The touch event support this feature by default.
|
|
|
* The term "pointer capture" is from the spec:
|
|
|
* https://www.w3.org/TR/pointerevents2/#idl-def-element-setpointercapture-pointerid
|
|
|
*
|
|
|
* Note:
|
|
|
* There might be some cases that the mouse event can not be received on `document`.
|
|
|
* For example,
|
|
|
* (A) When `useCapture` is not supported and some user defined event listeners on the ancestor
|
|
|
* of zr dom throw Error.
|
|
|
* (B) When `useCapture` is not supported and some user defined event listeners on the ancestor of
|
|
|
* zr dom call `stopPropagation`.
|
|
|
* In these cases, the `mousemove` event might be keep triggering event when the mouse is released.
|
|
|
* We try to reduce the side-effect in those cases, that is, use `isOutsideBoundary` to prevent
|
|
|
* it from do anything (especially, `findHover`).
|
|
|
* (`useCapture` mean, `addEvnetListener(listener, {capture: true})`, althought it may not be
|
|
|
* suppported in some environments.)
|
|
|
*
|
|
|
* Note:
|
|
|
* If `HandlerProxy` listens to `document` with `useCapture`, `HandlerProxy` needs to
|
|
|
* prevent user-registered-handler from calling `stopPropagation` and `preventDefault`
|
|
|
* when the `event.target` is not a zrender dom element. Otherwise the user-registered-handler
|
|
|
* may be able to prevent other elements (that not relevant to zrender) in the web page from receiving
|
|
|
* dom events.
|
|
|
*/
|
|
|
|
|
|
const SILENT = 'silent';
|
|
|
|
|
|
function makeEventPacket(eveType: ElementEventName, targetInfo: {
|
|
|
target?: Element
|
|
|
topTarget?: Element
|
|
|
}, event: ZRRawEvent): ElementEvent {
|
|
|
return {
|
|
|
type: eveType,
|
|
|
event: event,
|
|
|
// target can only be an element that is not silent.
|
|
|
target: targetInfo.target,
|
|
|
// topTarget can be a silent element.
|
|
|
topTarget: targetInfo.topTarget,
|
|
|
cancelBubble: false,
|
|
|
offsetX: event.zrX,
|
|
|
offsetY: event.zrY,
|
|
|
gestureEvent: (event as ZRPinchEvent).gestureEvent,
|
|
|
pinchX: (event as ZRPinchEvent).pinchX,
|
|
|
pinchY: (event as ZRPinchEvent).pinchY,
|
|
|
pinchScale: (event as ZRPinchEvent).pinchScale,
|
|
|
wheelDelta: event.zrDelta,
|
|
|
zrByTouch: event.zrByTouch,
|
|
|
which: event.which,
|
|
|
stop: stopEvent
|
|
|
};
|
|
|
}
|
|
|
|
|
|
function stopEvent(this: ElementEvent) {
|
|
|
eventTool.stop(this.event);
|
|
|
}
|
|
|
|
|
|
class EmptyProxy extends Eventful {
|
|
|
handler: Handler = null
|
|
|
dispose() {}
|
|
|
setCursor() {}
|
|
|
}
|
|
|
|
|
|
class HoveredResult {
|
|
|
x: number
|
|
|
y: number
|
|
|
target: Displayable
|
|
|
topTarget: Displayable
|
|
|
constructor(x?: number, y?: number) {
|
|
|
this.x = x;
|
|
|
this.y = y;
|
|
|
}
|
|
|
}
|
|
|
|
|
|
const handlerNames = [
|
|
|
'click', 'dblclick', 'mousewheel', 'mouseout',
|
|
|
'mouseup', 'mousedown', 'mousemove', 'contextmenu'
|
|
|
];
|
|
|
|
|
|
type HandlerName = 'click' |'dblclick' |'mousewheel' |'mouseout' |
|
|
|
'mouseup' |'mousedown' |'mousemove' |'contextmenu';
|
|
|
|
|
|
const tmpRect = new BoundingRect(0, 0, 0, 0);
|
|
|
|
|
|
// TODO draggable
|
|
|
class Handler extends Eventful {
|
|
|
|
|
|
storage: Storage
|
|
|
painter: PainterBase
|
|
|
painterRoot: HTMLElement
|
|
|
|
|
|
proxy: HandlerProxyInterface
|
|
|
|
|
|
private _hovered = new HoveredResult(0, 0)
|
|
|
|
|
|
private _gestureMgr: GestureMgr
|
|
|
|
|
|
private _draggingMgr: Draggable
|
|
|
|
|
|
private _pointerSize: number
|
|
|
|
|
|
_downEl: Element
|
|
|
_upEl: Element
|
|
|
_downPoint: [number, number]
|
|
|
|
|
|
constructor(
|
|
|
storage: Storage,
|
|
|
painter: PainterBase,
|
|
|
proxy: HandlerProxyInterface,
|
|
|
painterRoot: HTMLElement,
|
|
|
pointerSize: number
|
|
|
) {
|
|
|
super();
|
|
|
|
|
|
this.storage = storage;
|
|
|
|
|
|
this.painter = painter;
|
|
|
|
|
|
this.painterRoot = painterRoot;
|
|
|
|
|
|
this._pointerSize = pointerSize;
|
|
|
|
|
|
proxy = proxy || new EmptyProxy();
|
|
|
|
|
|
/**
|
|
|
* Proxy of event. can be Dom, WebGLSurface, etc.
|
|
|
*/
|
|
|
this.proxy = null;
|
|
|
|
|
|
this.setHandlerProxy(proxy);
|
|
|
|
|
|
this._draggingMgr = new Draggable(this);
|
|
|
}
|
|
|
|
|
|
setHandlerProxy(proxy: HandlerProxyInterface) {
|
|
|
if (this.proxy) {
|
|
|
this.proxy.dispose();
|
|
|
}
|
|
|
|
|
|
if (proxy) {
|
|
|
util.each(handlerNames, function (name) {
|
|
|
proxy.on && proxy.on(name, this[name as HandlerName], this);
|
|
|
}, this);
|
|
|
// Attach handler
|
|
|
proxy.handler = this;
|
|
|
}
|
|
|
this.proxy = proxy;
|
|
|
}
|
|
|
|
|
|
mousemove(event: ZRRawEvent) {
|
|
|
const x = event.zrX;
|
|
|
const y = event.zrY;
|
|
|
|
|
|
const isOutside = isOutsideBoundary(this, x, y);
|
|
|
|
|
|
let lastHovered = this._hovered;
|
|
|
let lastHoveredTarget = lastHovered.target;
|
|
|
|
|
|
// If lastHoveredTarget is removed from zr (detected by '__zr') by some API call
|
|
|
// (like 'setOption' or 'dispatchAction') in event handlers, we should find
|
|
|
// lastHovered again here. Otherwise 'mouseout' can not be triggered normally.
|
|
|
// See #6198.
|
|
|
if (lastHoveredTarget && !lastHoveredTarget.__zr) {
|
|
|
lastHovered = this.findHover(lastHovered.x, lastHovered.y);
|
|
|
lastHoveredTarget = lastHovered.target;
|
|
|
}
|
|
|
|
|
|
const hovered = this._hovered = isOutside ? new HoveredResult(x, y) : this.findHover(x, y);
|
|
|
const hoveredTarget = hovered.target;
|
|
|
|
|
|
const proxy = this.proxy;
|
|
|
proxy.setCursor && proxy.setCursor(hoveredTarget ? hoveredTarget.cursor : 'default');
|
|
|
|
|
|
// Mouse out on previous hovered element
|
|
|
if (lastHoveredTarget && hoveredTarget !== lastHoveredTarget) {
|
|
|
this.dispatchToElement(lastHovered, 'mouseout', event);
|
|
|
}
|
|
|
|
|
|
// Mouse moving on one element
|
|
|
this.dispatchToElement(hovered, 'mousemove', event);
|
|
|
|
|
|
// Mouse over on a new element
|
|
|
if (hoveredTarget && hoveredTarget !== lastHoveredTarget) {
|
|
|
this.dispatchToElement(hovered, 'mouseover', event);
|
|
|
}
|
|
|
}
|
|
|
|
|
|
mouseout(event: ZRRawEvent) {
|
|
|
const eventControl = event.zrEventControl;
|
|
|
|
|
|
if (eventControl !== 'only_globalout') {
|
|
|
this.dispatchToElement(this._hovered, 'mouseout', event);
|
|
|
}
|
|
|
|
|
|
if (eventControl !== 'no_globalout') {
|
|
|
// FIXME: if the pointer moving from the extra doms to realy "outside",
|
|
|
// the `globalout` should have been triggered. But currently not.
|
|
|
this.trigger('globalout', {type: 'globalout', event: event});
|
|
|
}
|
|
|
}
|
|
|
|
|
|
/**
|
|
|
* Resize
|
|
|
*/
|
|
|
resize() {
|
|
|
this._hovered = new HoveredResult(0, 0);
|
|
|
}
|
|
|
|
|
|
/**
|
|
|
* Dispatch event
|
|
|
*/
|
|
|
dispatch(eventName: HandlerName, eventArgs?: any) {
|
|
|
const handler = this[eventName];
|
|
|
handler && handler.call(this, eventArgs);
|
|
|
}
|
|
|
|
|
|
/**
|
|
|
* Dispose
|
|
|
*/
|
|
|
dispose() {
|
|
|
|
|
|
this.proxy.dispose();
|
|
|
|
|
|
this.storage = null;
|
|
|
this.proxy = null;
|
|
|
this.painter = null;
|
|
|
}
|
|
|
|
|
|
/**
|
|
|
* 设置默认的cursor style
|
|
|
* @param cursorStyle 例如 crosshair，默认为 'default'
|
|
|
*/
|
|
|
setCursorStyle(cursorStyle: string) {
|
|
|
const proxy = this.proxy;
|
|
|
proxy.setCursor && proxy.setCursor(cursorStyle);
|
|
|
}
|
|
|
|
|
|
/**
|
|
|
* 事件分发代理
|
|
|
*
|
|
|
* @private
|
|
|
* @param {Object} targetInfo {target, topTarget} 目标图形元素
|
|
|
* @param {string} eventName 事件名称
|
|
|
* @param {Object} event 事件对象
|
|
|
*/
|
|
|
dispatchToElement(targetInfo: {
|
|
|
target?: Element
|
|
|
topTarget?: Element
|
|
|
}, eventName: ElementEventName, event: ZRRawEvent) {
|
|
|
|
|
|
targetInfo = targetInfo || {};
|
|
|
|
|
|
let el = targetInfo.target as Element;
|
|
|
if (el && el.silent) {
|
|
|
return;
|
|
|
}
|
|
|
const eventKey = ('on' + eventName) as ElementEventNameWithOn;
|
|
|
const eventPacket = makeEventPacket(eventName, targetInfo, event);
|
|
|
|
|
|
while (el) {
|
|
|
el[eventKey]
|
|
|
&& (eventPacket.cancelBubble = !!el[eventKey].call(el, eventPacket));
|
|
|
|
|
|
el.trigger(eventName, eventPacket);
|
|
|
|
|
|
// Bubble to the host if on the textContent.
|
|
|
// PENDING
|
|
|
el = el.__hostTarget ? el.__hostTarget : el.parent;
|
|
|
|
|
|
if (eventPacket.cancelBubble) {
|
|
|
break;
|
|
|
}
|
|
|
}
|
|
|
|
|
|
if (!eventPacket.cancelBubble) {
|
|
|
// 冒泡到顶级 zrender 对象
|
|
|
this.trigger(eventName, eventPacket);
|
|
|
// 分发事件到用户自定义层
|
|
|
// 用户有可能在全局 click 事件中 dispose，所以需要判断下 painter 是否存在
|
|
|
if (this.painter && (this.painter as CanvasPainter).eachOtherLayer) {
|
|
|
(this.painter as CanvasPainter).eachOtherLayer(function (layer) {
|
|
|
if (typeof (layer[eventKey]) === 'function') {
|
|
|
layer[eventKey].call(layer, eventPacket);
|
|
|
}
|
|
|
if (layer.trigger) {
|
|
|
layer.trigger(eventName, eventPacket);
|
|
|
}
|
|
|
});
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
|
|
|
findHover(x: number, y: number, exclude?: Displayable): HoveredResult {
|
|
|
const list = this.storage.getDisplayList();
|
|
|
const out = new HoveredResult(x, y);
|
|
|
setHoverTarget(list, out, x, y, exclude);
|
|
|
|
|
|
if (this._pointerSize && !out.target) {
|
|
|
/**
|
|
|
* If no element at pointer position, check intersection with
|
|
|
* elements with pointer enlarged by target size.
|
|
|
*/
|
|
|
const candidates: Displayable[] = [];
|
|
|
const pointerSize = this._pointerSize;
|
|
|
const targetSizeHalf = pointerSize / 2;
|
|
|
const pointerRect = new BoundingRect(x - targetSizeHalf, y - targetSizeHalf, pointerSize, pointerSize);
|
|
|
|
|
|
for (let i = list.length - 1; i >= 0; i--) {
|
|
|
const el = list[i];
|
|
|
if (el !== exclude
|
|
|
&& !el.ignore
|
|
|
&& !el.ignoreCoarsePointer
|
|
|
// If an element ignores, its textContent should also ignore.
|
|
|
// TSpan's parent is not a Group but a ZRText.
|
|
|
// See Text.js _getOrCreateChild
|
|
|
&& (!el.parent || !(el.parent as any).ignoreCoarsePointer)
|
|
|
) {
|
|
|
tmpRect.copy(el.getBoundingRect());
|
|
|
if (el.transform) {
|
|
|
tmpRect.applyTransform(el.transform);
|
|
|
}
|
|
|
if (tmpRect.intersect(pointerRect)) {
|
|
|
candidates.push(el);
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
|
|
|
/**
|
|
|
* If there are elements whose bounding boxes are near the pointer,
|
|
|
* use the most top one that intersects with the enlarged pointer.
|
|
|
*/
|
|
|
if (candidates.length) {
|
|
|
const rStep = 4;
|
|
|
const thetaStep = Math.PI / 12;
|
|
|
const PI2 = Math.PI * 2;
|
|
|
for (let r = 0; r < targetSizeHalf; r += rStep) {
|
|
|
for (let theta = 0; theta < PI2; theta += thetaStep) {
|
|
|
const x1 = x + r * Math.cos(theta);
|
|
|
const y1 = y + r * Math.sin(theta);
|
|
|
setHoverTarget(candidates, out, x1, y1, exclude);
|
|
|
if (out.target) {
|
|
|
return out;
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
|
|
|
return out;
|
|
|
}
|
|
|
|
|
|
processGesture(event: ZRRawEvent, stage?: 'start' | 'end' | 'change') {
|
|
|
if (!this._gestureMgr) {
|
|
|
this._gestureMgr = new GestureMgr();
|
|
|
}
|
|
|
const gestureMgr = this._gestureMgr;
|
|
|
|
|
|
stage === 'start' && gestureMgr.clear();
|
|
|
|
|
|
const gestureInfo = gestureMgr.recognize(
|
|
|
event as ZRRawTouchEvent,
|
|
|
this.findHover(event.zrX, event.zrY, null).target,
|
|
|
(this.proxy as HandlerDomProxy).dom
|
|
|
);
|
|
|
|
|
|
stage === 'end' && gestureMgr.clear();
|
|
|
|
|
|
// Do not do any preventDefault here. Upper application do that if necessary.
|
|
|
if (gestureInfo) {
|
|
|
const type = gestureInfo.type;
|
|
|
(event as ZRPinchEvent).gestureEvent = type;
|
|
|
|
|
|
let res = new HoveredResult();
|
|
|
res.target = gestureInfo.target;
|
|
|
this.dispatchToElement(res, type as ElementEventName, gestureInfo.event as ZRRawEvent);
|
|
|
}
|
|
|
}
|
|
|
|
|
|
click: (event: ZRRawEvent) => void
|
|
|
mousedown: (event: ZRRawEvent) => void
|
|
|
mouseup: (event: ZRRawEvent) => void
|
|
|
mousewheel: (event: ZRRawEvent) => void
|
|
|
dblclick: (event: ZRRawEvent) => void
|
|
|
contextmenu: (event: ZRRawEvent) => void
|
|
|
}
|
|
|
|
|
|
// Common handlers
|
|
|
util.each(['click', 'mousedown', 'mouseup', 'mousewheel', 'dblclick', 'contextmenu'], function (name: HandlerName) {
|
|
|
Handler.prototype[name] = function (event) {
|
|
|
const x = event.zrX;
|
|
|
const y = event.zrY;
|
|
|
const isOutside = isOutsideBoundary(this, x, y);
|
|
|
|
|
|
let hovered;
|
|
|
let hoveredTarget;
|
|
|
|
|
|
if (name !== 'mouseup' || !isOutside) {
|
|
|
// Find hover again to avoid click event is dispatched manually. Or click is triggered without mouseover
|
|
|
hovered = this.findHover(x, y);
|
|
|
hoveredTarget = hovered.target;
|
|
|
}
|
|
|
|
|
|
if (name === 'mousedown') {
|
|
|
this._downEl = hoveredTarget;
|
|
|
this._downPoint = [event.zrX, event.zrY];
|
|
|
// In case click triggered before mouseup
|
|
|
this._upEl = hoveredTarget;
|
|
|
}
|
|
|
else if (name === 'mouseup') {
|
|
|
this._upEl = hoveredTarget;
|
|
|
}
|
|
|
else if (name === 'click') {
|
|
|
if (this._downEl !== this._upEl
|
|
|
// Original click event is triggered on the whole canvas element,
|
|
|
// including the case that `mousedown` - `mousemove` - `mouseup`,
|
|
|
// which should be filtered, otherwise it will bring trouble to
|
|
|
// pan and zoom.
|
|
|
|| !this._downPoint
|
|
|
// Arbitrary value
|
|
|
|| vec2.dist(this._downPoint, [event.zrX, event.zrY]) > 4
|
|
|
) {
|
|
|
return;
|
|
|
}
|
|
|
this._downPoint = null;
|
|
|
}
|
|
|
|
|
|
this.dispatchToElement(hovered, name, event);
|
|
|
};
|
|
|
});
|
|
|
|
|
|
function isHover(displayable: Displayable, x: number, y: number) {
|
|
|
if (displayable[displayable.rectHover ? 'rectContain' : 'contain'](x, y)) {
|
|
|
let el: Element = displayable;
|
|
|
let isSilent;
|
|
|
let ignoreClip = false;
|
|
|
while (el) {
|
|
|
// Ignore clip on any ancestors.
|
|
|
if (el.ignoreClip) {
|
|
|
ignoreClip = true;
|
|
|
}
|
|
|
if (!ignoreClip) {
|
|
|
let clipPath = el.getClipPath();
|
|
|
// If clipped by ancestor.
|
|
|
// FIXME: If clipPath has neither stroke nor fill,
|
|
|
// el.clipPath.contain(x, y) will always return false.
|
|
|
if (clipPath && !clipPath.contain(x, y)) {
|
|
|
return false;
|
|
|
}
|
|
|
if (el.silent) {
|
|
|
isSilent = true;
|
|
|
}
|
|
|
}
|
|
|
// Consider when el is textContent, also need to be silent
|
|
|
// if any of its host el and its ancestors is silent.
|
|
|
const hostEl = el.__hostTarget;
|
|
|
el = hostEl ? hostEl : el.parent;
|
|
|
}
|
|
|
return isSilent ? SILENT : true;
|
|
|
}
|
|
|
|
|
|
return false;
|
|
|
}
|
|
|
|
|
|
function setHoverTarget(
|
|
|
list: Displayable[],
|
|
|
out: HoveredResult,
|
|
|
x: number,
|
|
|
y: number,
|
|
|
exclude: Displayable
|
|
|
) {
|
|
|
for (let i = list.length - 1; i >= 0; i--) {
|
|
|
const el = list[i];
|
|
|
let hoverCheckResult;
|
|
|
if (el !== exclude
|
|
|
// getDisplayList may include ignored item in VML mode
|
|
|
&& !el.ignore
|
|
|
&& (hoverCheckResult = isHover(el, x, y))
|
|
|
) {
|
|
|
!out.topTarget && (out.topTarget = el);
|
|
|
if (hoverCheckResult !== SILENT) {
|
|
|
out.target = el;
|
|
|
break;
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
|
|
|
/**
|
|
|
* See [DRAG_OUTSIDE].
|
|
|
*/
|
|
|
function isOutsideBoundary(handlerInstance: Handler, x: number, y: number) {
|
|
|
const painter = handlerInstance.painter;
|
|
|
return x < 0 || x > painter.getWidth() || y < 0 || y > painter.getHeight();
|
|
|
}
|
|
|
|
|
|
export default Handler;
|