如何在删除Java应用程序时更改光标 [英] How to change cursor when dropping into Java application

问题描述

我有一些问题，我只是不能弄清楚...
我正在写一个Swing Java应用程序与接受拖放的JList。我想通过Java应用程序从我的系统拖动文件或文件夹时更改光标。

I'm having some problems I just can't figure out... I'm writing a Swing Java application with a JList that accepts drag-and-drops. I want to change the cursor while dragging a file or folder from my system over the Java application.

推荐答案

我自己找到了...感谢克林顿回答。这是我使用的：

I've found it myself... Thanks Clinton for answering though. Here's what I've used:

首先创建JList ...你都知道如何做...
然后我添加了一个setDropTarget ：

first create the JList... You all know how to do that... Then I've added a setDropTarget:

lstFiles.setDropTarget(new DropTarget()
{
    @Override
    public synchronized void drop(DropTargetDropEvent dtde) 
    {
        this.changeToNormal();
        //handle the drop... [...]
    }

    @Override
    public synchronized void dragEnter(DropTargetDragEvent dtde) 
    {
        //Change cursor...
        Cursor cursor = new Cursor(Cursor.HAND_CURSOR);
        setCursor(cursor);

        //Change JList background...
        lstFiles.setBackground(Color.LIGHT_GRAY);
    }

    @Override
    public synchronized void dragExit(DropTargetEvent dtde) 
    {
        this.changeToNormal();
    }

    private void changeToNormal()
    {
        //Set cursor to default.
        Cursor cursor = new Cursor(Cursor.DEFAULT_CURSOR);
        setCursor(cursor);

        //Set background to normal...
        lstFiles.setBackground(Color.WHITE);
    }
});

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