我有一个Java swing应用程序,它使用“可平移”的JComponent来显示大数据。当用户移动鼠标滚轮时,我会监听这些事件,并根据滚动量更新JComponent的内容。
我希望根据用户是否为
我如何检测用户正在使用鼠标滚轮还是触控板来生成滚动事件?我依赖于java1.6的swing,所以我不能去javaFX。
问题背后的故事:当用户使用鼠标滚轮时,我只是想给滚动事件增加一种很酷的惯性感觉。当然,在MacOSX上,触控板有自己内置的惯性元件。所以我想决定,是否应该产生惯性运动。
发布于 2015-06-16 16:11:55
Java Swing是一项古老的技术,它支持传统的鼠标滚轮旋转事件。
当你使用旧的滚轮鼠标或滚轮跟踪垫时,它将读取硬件滚轮的旋转。
当您使用现代激光鼠标时,鼠标移动将转换为旋转运动。
当你使用触摸板时,就像在现代Mac笔记本电脑中一样,滚动手势将被转换为旋转运动,左键和右键单击时的单触摸和双触摸(基于操作系统的鼠标板配置)。
您可以使用库来详细检查输入设备,如果您的鼠标或触摸板通过USB连接到您的计算机,您可以尝试J-USB library。
至于内部硬件,首先你必须识别操作系统的类型,在此基础上你可以得到information on system and hardware in Java。
最后,如果您的应用程序与用户交互,我建议询问用户他们使用的鼠标类型,并将其存储在配置文件或其他文件中。
发布于 2015-06-03 16:56:12
试试这段代码
。
public class Exp extends JFrame {
private String string;
private JLabel l;
public Exp() {
super("Title");
l = new JLabel("Status");
add(l, BorderLayout.SOUTH);
addMouseListener(new MouseClass());
}
private class MouseClass extends MouseAdapter {
public void mouseClicked(MouseEvent e) {
string = String.format("Clicked %d Times", e.getClickCount());
if(e.isMetaDown())
string += " With Right Mouse Button";
else if(e.isAltDown())
string += " With Centre Mouse Button";
else
string += " With Left Mouse Button";
l.setText(string);
}
}
}
也可以试试这个:
您可以通过SwingUtilities中的以下三种方法确定按下了哪一个鼠标按钮:
isLeftMouseButton
isMiddleMouseButton
isRightMouseButton
发布于 2015-06-13 16:23:49
鼠标轮监听器接口
尽管MouseWheelListener
只有一个方法,但它有相应的适配器类- MouseAdapter
。此功能使应用程序只有一个适配器类实例供组件管理来自鼠标指针的所有类型的事件。
mouseWheelMoved(MouseWheelEvent) //Called when the mouse wheel is rotated.
下面的代码片段与鼠标滚轮事件处理相关:
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.event.MouseWheelEvent;
import java.awt.event.MouseWheelListener;
import javax.swing.*;
public class MouseWheelEventDemo extends JPanel
implements MouseWheelListener {
JTextArea textArea;
JScrollPane scrollPane;
static final String NEWLINE = System.getProperty("line.separator");
public static void main(String[] args) {
/* Use an appropriate Look and Feel */
try {
//UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel");
//UIManager.setLookAndFeel("com.sun.java.swing.plaf.gtk.GTKLookAndFeel");
UIManager.setLookAndFeel("javax.swing.plaf.metal.MetalLookAndFeel");
} catch (UnsupportedLookAndFeelException ex) {
ex.printStackTrace();
} catch (IllegalAccessException ex) {
ex.printStackTrace();
} catch (InstantiationException ex) {
ex.printStackTrace();
} catch (ClassNotFoundException ex) {
ex.printStackTrace();
}
/* Turn off metal's use of bold fonts */
UIManager.put("swing.boldMetal", Boolean.FALSE);
//Schedule a job for the event dispatch thread:
//creating and showing this application's GUI.
javax.swing.SwingUtilities.invokeLater(new Runnable() {
public void run() {
createAndShowGUI();
}
});
}
/**
* Create the GUI and show it. For thread safety,
* this method should be invoked from the
* event dispatch thread.
*/
private static void createAndShowGUI() {
//Create and set up the window.
JFrame frame = new JFrame("MouseWheelEventDemo");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//Create and set up the content pane.
JComponent newContentPane = new MouseWheelEventDemo();
newContentPane.setOpaque(true); //content panes must be opaque
frame.setContentPane(newContentPane);
//Display the window.
frame.pack();
frame.setVisible(true);
}
public MouseWheelEventDemo() {
super(new BorderLayout());
textArea = new JTextArea();
textArea.setEditable(false);
scrollPane = new JScrollPane(textArea);
scrollPane.setVerticalScrollBarPolicy(
JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
scrollPane.setPreferredSize(new Dimension(400, 250));
add(scrollPane, BorderLayout.CENTER);
textArea.append("This text area displays information "
+ "about its mouse wheel events."
+ NEWLINE);
//Register for mouse-wheel events on the text area.
textArea.addMouseWheelListener(this);
setPreferredSize(new Dimension(450, 350));
setBorder(BorderFactory.createEmptyBorder(20,20,20,20));
}
//Append to the text area and make sure the new text is visible.
void eventOutput(String eventDescription, MouseWheelEvent e) {
textArea.append(e.getComponent().getClass().getName()
+ ": "
+ eventDescription);
textArea.setCaretPosition(textArea.getDocument().getLength());
}
public void mouseWheelMoved(MouseWheelEvent e) {
String message;
int notches = e.getWheelRotation();
if (notches < 0) {
message = "Mouse wheel moved UP "
+ -notches + " notch(es)" + NEWLINE;
} else {
message = "Mouse wheel moved DOWN "
+ notches + " notch(es)" + NEWLINE;
}
if (e.getScrollType() == MouseWheelEvent.WHEEL_UNIT_SCROLL) {
message += " Scroll type: WHEEL_UNIT_SCROLL" + NEWLINE;
message += " Scroll amount: " + e.getScrollAmount()
+ " unit increments per notch" + NEWLINE;
message += " Units to scroll: " + e.getUnitsToScroll()
+ " unit increments" + NEWLINE;
message += " Vertical unit increment: "
+ scrollPane.getVerticalScrollBar().getUnitIncrement(1)
+ " pixels" + NEWLINE;
} else { //scroll type == MouseWheelEvent.WHEEL_BLOCK_SCROLL
message += " Scroll type: WHEEL_BLOCK_SCROLL" + NEWLINE;
message += " Vertical block increment: "
+ scrollPane.getVerticalScrollBar().getBlockIncrement(1)
+ " pixels" + NEWLINE;
}
eventOutput(message, e);
}
}
对于鼠标滚轮使用单位增量的系统,MouseWheelEventDemo的输出可能如下所示:
javax.swing.JTextArea: Mouse wheel moved UP 1 notch(es)
Scroll type: WHEEL_UNIT_SCROLL
Scroll amount: 3 unit increments per notch
Units to scroll: -3 unit increments
Vertical unit increment: 16 pixels
https://stackoverflow.com/questions/30614291
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