我正在使用 Java Swing 开发应用程序。它将主要用于研究针对医学目的的五角星的示波图。希望用户可以在图像上做笔记(大概类似于 Window 的绘图中使用的铅笔)。
请记住,每次用户加载图像时,都会附加以下鼠标移动监听器(出于可用性原因,为了使图像可拖动):
public class DragMouseListener implements MouseMotionListener {
JLabel jl;
int imageX, imageY;
public DragMouseListener(JLabel jlabel) {
this.jl = jlabel;
jl.addMouseMotionListener(this);
}
@Override
public void mouseDragged(MouseEvent e) {
updateImagePosition(e);
}
@Override
public void mouseMoved(MouseEvent e) {
}
private void updateImagePosition(MouseEvent e) {
imageX = e.getX();
imageY = e.getY();
jl.setLocation(imageX, imageY);
}
}
直到现在,我什至无法接近实现它的方法,而且我无法在 Internet 上找到该问题的任何引用资料。任何帮助(甚至粗略的想法)将不胜感激。提前致谢。
尼克
最佳答案
我尝试了你要求的 DragMouseListener
但发现它很不舒服所以使用 JInternal Frame
它工作正常(但你仍然可以在 JInternal Frame 中拖动图像,正如我实现的你要求的东西)。为了免提写作,我使用了 JEditorPane
(如果你愿意,你可以添加手写的东西,但它会很乱)和可访问的父 JScrollPane,这样你就可以输入如何很多你想要的。
您可以轻松拖动 JInternal Frame:
注意:为此我使用了 NetBeans GUI Builder,建议您也使用任何 GUI 构建器 打字工作很容易。
代码如下:
import java.awt.event.MouseEvent;
public class Move extends javax.swing.JFrame {
public Move() {
initComponents();
}
@SuppressWarnings("unchecked")
private void initComponents() {
jPanel1 = new javax.swing.JPanel();
jInternalFrame1 = new javax.swing.JInternalFrame();
jLabel1 = new javax.swing.JLabel();
jScrollPane1 = new javax.swing.JScrollPane();
jEditorPane1 = new javax.swing.JEditorPane();
jInternalFrame2 = new javax.swing.JInternalFrame();
jLabel2 = new javax.swing.JLabel();
jScrollPane2 = new javax.swing.JScrollPane();
jEditorPane2 = new javax.swing.JEditorPane();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
jPanel1.setBackground(new java.awt.Color(0, 0, 0));
jInternalFrame1.setVisible(true);
jLabel1.setIcon(new javax.swing.ImageIcon(getClass().getResource("/images.jpg"))); // NOI18N
jLabel1.setText("jLabel1");
jLabel1.addComponentListener(new java.awt.event.ComponentAdapter() {
public void componentMoved(java.awt.event.ComponentEvent evt) {
jLabel1ComponentMoved(evt);
}
});
jLabel1.addMouseMotionListener(new java.awt.event.MouseMotionAdapter() {
public void mouseDragged(java.awt.event.MouseEvent evt) {
jLabel1MouseDragged(evt);
}
});
jScrollPane1.setViewportView(jEditorPane1);
javax.swing.GroupLayout jInternalFrame1Layout = new javax.swing.GroupLayout(jInternalFrame1.getContentPane());
jInternalFrame1.getContentPane().setLayout(jInternalFrame1Layout);
jInternalFrame1Layout.setHorizontalGroup(
jInternalFrame1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jInternalFrame1Layout.createSequentialGroup()
.addContainerGap()
.addGroup(jInternalFrame1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 203, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jLabel1, 0, 0, Short.MAX_VALUE))
.addContainerGap())
);
jInternalFrame1Layout.setVerticalGroup(
jInternalFrame1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jInternalFrame1Layout.createSequentialGroup()
.addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 38, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jLabel1, javax.swing.GroupLayout.DEFAULT_SIZE, 250, Short.MAX_VALUE)
.addContainerGap())
);
jInternalFrame2.setVisible(true);
jLabel2.setIcon(new javax.swing.ImageIcon("E:\\untitled.png")); // NOI18N
jLabel2.setText("jLabel2");
jScrollPane2.setViewportView(jEditorPane2);
javax.swing.GroupLayout jInternalFrame2Layout = new javax.swing.GroupLayout(jInternalFrame2.getContentPane());
jInternalFrame2.getContentPane().setLayout(jInternalFrame2Layout);
jInternalFrame2Layout.setHorizontalGroup(
jInternalFrame2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jInternalFrame2Layout.createSequentialGroup()
.addContainerGap()
.addGroup(jInternalFrame2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jScrollPane2, javax.swing.GroupLayout.Alignment.TRAILING, javax.swing.GroupLayout.DEFAULT_SIZE, 222, Short.MAX_VALUE)
.addComponent(jLabel2, javax.swing.GroupLayout.Alignment.TRAILING, javax.swing.GroupLayout.PREFERRED_SIZE, 222, Short.MAX_VALUE))
.addContainerGap())
);
jInternalFrame2Layout.setVerticalGroup(
jInternalFrame2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jInternalFrame2Layout.createSequentialGroup()
.addContainerGap()
.addComponent(jScrollPane2, javax.swing.GroupLayout.PREFERRED_SIZE, 36, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
.addComponent(jLabel2)
.addContainerGap(40, Short.MAX_VALUE))
);
javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
jPanel1.setLayout(jPanel1Layout);
jPanel1Layout.setHorizontalGroup(
jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel1Layout.createSequentialGroup()
.addContainerGap()
.addComponent(jInternalFrame1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(177, 177, 177)
.addComponent(jInternalFrame2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap(71, Short.MAX_VALUE))
);
jPanel1Layout.setVerticalGroup(
jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel1Layout.createSequentialGroup()
.addGap(49, 49, 49)
.addComponent(jInternalFrame1)
.addGap(209, 209, 209))
.addGroup(jPanel1Layout.createSequentialGroup()
.addGap(31, 31, 31)
.addComponent(jInternalFrame2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap(166, Short.MAX_VALUE))
);
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
);
pack();
}
private void jLabel1ComponentMoved(java.awt.event.ComponentEvent evt) {
}
private void jLabel1MouseDragged(java.awt.event.MouseEvent evt) {
updateImagePosition(evt);
}
private void updateImagePosition(MouseEvent evt) {
int imageX = evt.getX();
int imageY = evt.getY();
jLabel1.setLocation(imageX, imageY);
}
public static void main(String args[]) {
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new Move().setVisible(true);
}
});
}
private javax.swing.JEditorPane jEditorPane1;
private javax.swing.JEditorPane jEditorPane2;
private javax.swing.JInternalFrame jInternalFrame1;
private javax.swing.JInternalFrame jInternalFrame2;
private javax.swing.JLabel jLabel1;
private javax.swing.JLabel jLabel2;
private javax.swing.JPanel jPanel1;
private javax.swing.JScrollPane jScrollPane1;
private javax.swing.JScrollPane jScrollPane2;
}
更新:
参见 This帖子由@mKorbel 和@trashgod 回答,使 JInternal 框架最小化/最大化和调整大小。很好的答案。
关于java - 允许用户在图像上手写标记 - Java、Swing,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/14093695/