74 lines
1.6 KiB
JavaScript
74 lines
1.6 KiB
JavaScript
/*
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Controls dragging of items in the container
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*/
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class Drag {
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static drag_items = []
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static drag_y = 0
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static setup() {
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let container = Container.get_container()
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DOM.ev(container, `dragstart`, (e) => {
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this.drag_start(e)
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})
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DOM.ev(container, `dragenter`, (e) => {
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this.drag_enter(e)
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})
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DOM.ev(container, `dragend`, (e) => {
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this.drag_end(e)
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})
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}
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static drag_start(e) {
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let item = Container.extract_item(e)
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let curl = Container.extract_curl(item)
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this.drag_y = e.clientY
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e.dataTransfer.setData(`text`, curl)
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e.dataTransfer.setDragImage(new Image(), 0, 0)
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let selected = Select.get()
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if (selected.length && selected.includes(item)) {
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this.drag_items = selected
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}
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else {
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if (!selected.includes(item)) {
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Select.single(item)
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}
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this.drag_items = [item]
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}
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}
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static drag_enter(e) {
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let items = Container.get_items()
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let item = Container.extract_item(e)
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let index = items.indexOf(item)
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if (index === -1) {
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return
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}
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let direction = (e.clientY > this.drag_y) ? `down` : `up`
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this.drag_y = e.clientY
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if (direction === `up`) {
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item.before(...this.drag_items)
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}
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else if (direction === `down`) {
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item.after(...this.drag_items)
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}
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}
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static drag_end(e) {
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if (Container.save_curls()) {
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Sort.set_value(`order`)
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}
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}
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} |