Question

我现在可以看到滚动优先级给予垂直滚动。我想改变这一点。我该怎么做？

Answer 1

感谢第一个答案 - 非常有帮助。但是我发现上面的响应中的iNewValue需要乘以evt.getWheelRotation（）值，这是由滚轮鼠标实际旋转的不同滚轮鼠标段的数量。

此外滚动时间的条件也需要考虑到这一点 - 条件必须是evt.getWheelRotation（）＆lt; = -1或evt.getWheelRotation（）＆gt; = 1

这是一个适合我的更新示例。

    import java.awt.Component;
    import java.awt.event.MouseAdapter;
    import java.awt.event.MouseWheelEvent;
    import javax.swing.JScrollBar;
    import javax.swing.JScrollPane;
    class MyJScrollPane extends JScrollPane 
    {



        public MyJScrollPane(Component component)
        {
            super(component);
            final JScrollBar horizontalScrollBar = getHorizontalScrollBar();
            final JScrollBar verticalScrollBar = getVerticalScrollBar();
            setWheelScrollingEnabled(false);
            addMouseWheelListener(new MouseAdapter()
            {
                public void mouseWheelMoved(MouseWheelEvent evt)
                {

                    if (evt.getWheelRotation() >= 1)//mouse wheel was rotated down/ towards the user
                    {
                        int iScrollAmount = evt.getScrollAmount();
                        int iNewValue = horizontalScrollBar.getValue() + horizontalScrollBar.getBlockIncrement() * iScrollAmount * Math.abs(evt.getWheelRotation());
                        if (iNewValue <= horizontalScrollBar.getMaximum())
                        {
                            horizontalScrollBar.setValue(iNewValue);
                        }
                    }
                    else if (evt.getWheelRotation() <= -1)//mouse wheel was rotated up/away from the user
                    {
                        int iScrollAmount = evt.getScrollAmount();
                        int iNewValue = horizontalScrollBar.getValue() - horizontalScrollBar.getBlockIncrement() * iScrollAmount * Math.abs(evt.getWheelRotation());
                        if (iNewValue >= 0)
                        {
                            horizontalScrollBar.setValue(iNewValue);
                        }
                    }
                }
            });
        }
    }

Answer 2

要更改JScrollPane的默认滚动优先级，您需要创建自己的JScrollPane版本，并在移动鼠标滚轮时强制执行水平ScrollBar以实现而不是垂直ScrollBar。

可以像这样创建被覆盖的JScrollPane版本：

import javax.swing.JScrollPane;
import javax.swing.JScrollBar;
import java.awt.Component;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseWheelListener;
import java.awt.event.MouseWheelEvent;

class MyJScrollPane extends JScrollPane 
{
    public MyJScrollPane(Component component)
    {
        super(component);
        final JScrollBar horizontalScrollBar = getHorizontalScrollBar();
        final JScrollBar verticalScrollBar = getVerticalScrollBar();
        setWheelScrollingEnabled(false);
        addMouseWheelListener(new MouseAdapter()
        {
            public void mouseWheelMoved(MouseWheelEvent evt)
            {
                if (evt.getWheelRotation() == 1)//mouse wheel was rotated down/ towards the user
                {
                    int iScrollAmount = evt.getScrollAmount();
                    int iNewValue = horizontalScrollBar.getValue() + horizontalScrollBar.getBlockIncrement() * iScrollAmount;
                    if (iNewValue <= horizontalScrollBar.getMaximum())
                    {
                        horizontalScrollBar.setValue(iNewValue);
                    }
                }
                else if (evt.getWheelRotation() == -1)//mouse wheel was rotated up/away from the user
                {
                    int iScrollAmount = evt.getScrollAmount();
                    int iNewValue = horizontalScrollBar.getValue() - horizontalScrollBar.getBlockIncrement() * iScrollAmount;
                    if (iNewValue >= 0)
                    {
                        horizontalScrollBar.setValue(iNewValue);
                    }
                }
            }
        });
    }
}

我希望这可以解决滚动优先级为JScrollPane的问题。

如何将Java Swing JScrollPane鼠标滚轮优先级更改为水平滚动？

2 个答案: