38 lines
No EOL
1 KiB
JavaScript
38 lines
No EOL
1 KiB
JavaScript
export default class EventAdapter {
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constructor(canvas) {
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this._mouseEvts = []
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canvas.addEventListener('mousedown', this._mouseDown.bind(this))
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canvas.addEventListener('mouseup', this._mouseUp.bind(this))
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canvas.addEventListener('mousemove', this._mouseMove.bind(this))
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canvas.addEventListener('wheel', this._wheel.bind(this))
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}
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consumeAll() {
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if (this._mouseEvts.length === 0) {
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return []
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}
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const all = this._mouseEvts.slice()
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this._mouseEvts = []
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return all
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}
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_mouseDown(e) {
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if (e.button === 0) {
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this._mouseEvts.push({type: 'down', x: e.offsetX, y: e.offsetY})
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}
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}
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_mouseUp(e) {
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if (e.button === 0) {
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this._mouseEvts.push({type: 'up', x: e.offsetX, y: e.offsetY})
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}
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}
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_mouseMove(e) {
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this._mouseEvts.push({type: 'move', x: e.offsetX, y: e.offsetY})
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}
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_wheel(e) {
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this._mouseEvts.push({type: 'wheel', y: e.deltaY})
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}
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} |