在 Java Swing 中检测 JScrollPane 上的 mouseClick 事件

发布于 2024-12-20 04:38:39 字数 656 浏览 0 评论 0原文

如果我有这样的东西，我可以使用布尔标志“performAdjustment”控制自动滚动：

static boolean performAdjustment = true;

JTextArea textArea = new JTextArea();
JScrollPane jScrollPane1 = new JScrollPane(textArea);

   jScrollPane1.getVerticalScrollBar().addAdjustmentListener(new AdjustmentListener() {  
            public void adjustmentValueChanged(AdjustmentEvent e) { 
                if(performAdjustment){
                    e.getAdjustable().setValue(e.getAdjustable().getMaximum());  
                }
        }});

现在我这工作正常，但问题是当用户单击滚动条时我想取消设置这个布尔标志，它应该当用户离开单击时再次设置（如 JavaScript 中的 onMouseOut 事件）。

你能告诉我如何添加这个新的事件监听器来检测滚动条的点击事件吗？

原文

If i have something like this, where i can control the auto-scrolling using boolean flag "performAdjustment":

static boolean performAdjustment = true;

JTextArea textArea = new JTextArea();
JScrollPane jScrollPane1 = new JScrollPane(textArea);

   jScrollPane1.getVerticalScrollBar().addAdjustmentListener(new AdjustmentListener() {  
            public void adjustmentValueChanged(AdjustmentEvent e) { 
                if(performAdjustment){
                    e.getAdjustable().setValue(e.getAdjustable().getMaximum());  
                }
        }});

Now i this works fine, but the problem is i want to unset this boolean flag when a user clicks on the scroll bar and it should be set again when the user leave the click (like onMouseOut event in JavaScript).

Can you tell me how can i add this new EventListener where i can detect click event of the scroll bar??

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