在fyne中检测拖拽

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英文:

Detecting drag in fyne

问题

如何在小部件中检测拖动事件?我尝试了以下代码:

    type drawRect struct {
        widget.Card
    }

    func (e *drawRect) Dragged(d *fyne.DragEvent) {
        fmt.Println("A")
    }

但是当我拖动它时,它并没有被调用。

英文:

How can I detect a drag event in a widget? I've tried this:

    type drawRect struct {
	    widget.Card
    }

    func (e *drawRect) Dragged(d *fyne.DragEvent) {
	    fmt.Println("A")
    }

but it is not called when I drag over it.

答案1

得分: 0

对于拖动一个项目,您需要实现完整的Draggable接口(您错过了DragEnd)https://developer.fyne.io/api/v2.0/draggable.html。

然而,您描述的可能是一个放置事件(属于操作系统拖放生命周期的一部分),目前还不支持。可拖动行为是为用户在您的UI中拖动对象的功能而设计的。

英文:

For dragging an item you need to implement the whole Draggable interface (you missed DragEnd) https://developer.fyne.io/api/v2.0/draggable.html.

However what you describe may be a drop event (part of the OS drag and drop lifecycle) which is not yet supported. The draggable behaviour is for the user feature of dragging an object inside your UI.

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  • 本文由 发表于 2021年12月20日 12:32:34
  • 转载请务必保留本文链接:https://go.coder-hub.com/70417406.html
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