25 lines
437 B
Go
25 lines
437 B
Go
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package tins2020
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type Drageable struct {
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start *Point
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dragged bool
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}
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func (d *Drageable) Cancel() { d.start = nil }
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func (d *Drageable) IsDragging() bool { return d.start != nil }
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func (d *Drageable) HasDragged() bool { return d.dragged }
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func (d *Drageable) Move(p Point) Point {
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delta := p.Sub(*d.start)
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d.start = &p
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d.dragged = true
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return delta
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}
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func (d *Drageable) Start(p Point) {
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d.start = &p
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d.dragged = false
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}
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