JPanel 切割（顶部关闭）内部对象，使用 Netbeans

Question

我使用 class.javax.swing.JFrame

问题：我想知道 Netbeans 在设计时使用什么尺寸（preferredSize）？

jtpWindows = new javax.swing.JTabbedPane();  // Contains jPHoriz
jPHoriz = new javax.swing.JPanel();  // Contains jPHorizGraph
jPHorizGraph = new javax.swing.JPanel();  // Contains jPHorizGraph01, jPHorizGap and jPHorizGraph02
jPHorizGraph01 = new javax.swing.JPanel();
jPHorizGap = new javax.swing.JPanel();
jPHorizGraph02 = new javax.swing.JPanel();

// 现在是如何包含的

jPHorizGraph01

//jPHorizGraph01 Upper
jPHorizGraph01.setPreferredSize(new java.awt.Dimension(1679, 323));
javax.swing.GroupLayout jPHorizGraph01Layout = new javax.swing.GroupLayout(jPHorizGraph01);
jPHorizGraph01.setLayout(jPHorizGraph01Layout);
jPHorizGraph01Layout.setHorizontalGroup(
  jPHorizGraph01Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
  .addGap(0, 0, Short.MAX_VALUE)
);
jPHorizGraph01Layout.setVerticalGroup(
  jPHorizGraph01Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
  .addGap(0, 323, Short.MAX_VALUE)
);

jPHorizGap

//jPHorizGap is a vertical separator between jPHorizGraph01 and jPHorizGraph02
jPHorizGap.setBorder(javax.swing.BorderFactory.createEtchedBorder());
jPHorizGap.setPreferredSize(new java.awt.Dimension(1679, 12));
javax.swing.GroupLayout jPHorizGapLayout = new javax.swing.GroupLayout(jPHorizGap);
jPHorizGap.setLayout(jPHorizGapLayout);
jPHorizGapLayout.setHorizontalGroup(
  jPHorizGapLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
  .addGap(0, 0, Short.MAX_VALUE)
);
jPHorizGapLayout.setVerticalGroup(
  jPHorizGapLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
  .addGap(0, 8, Short.MAX_VALUE)
);

jPHorizGraph02

//jPHorizGraph02 Lower
jPHorizGraph02.setPreferredSize(new java.awt.Dimension(1679, 323));

javax.swing.GroupLayout jPHorizGraph02Layout = new javax.swing.GroupLayout(jPHorizGraph02);
jPHorizGraph02.setLayout(jPHorizGraph02Layout);
jPHorizGraph02Layout.setHorizontalGroup(
  jPHorizGraph02Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
  .addGap(0, 0, Short.MAX_VALUE)
);
jPHorizGraph02Layout.setVerticalGroup(
  jPHorizGraph02Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
  .addGap(0, 323, Short.MAX_VALUE)
);

插入 jPHorizGraph01、jPHorizGap 和 jPHorizGraph02 在 jPHorizGraph

javax.swing.GroupLayout jPHorizGraphLayout = new javax.swing.GroupLayout(jPHorizGraph);
jPHorizGraph.setLayout(jPHorizGraphLayout);
jPHorizGraphLayout.setHorizontalGroup(
  jPHorizGraphLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
  .addComponent(jPHorizGraph01, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
  .addComponent(jPHorizGraph02, javax.swing.GroupLayout.Alignment.TRAILING, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
  .addComponent(jPHorizGap, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
);
jPHorizGraphLayout.setVerticalGroup(
  jPHorizGraphLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
  .addGroup(jPHorizGraphLayout.createSequentialGroup()
    .addComponent(jPHorizGraph01, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
    .addGap(0, 0, 0)
    .addComponent(jPHorizGap, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
    .addGap(0, 0, 0)
    .addComponent(jPHorizGraph02, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
    .addContainerGap())
);

在 jPHoriz

中插入 jPHorizGraph

  javax.swing.GroupLayout jPHorizLayout = new javax.swing.GroupLayout(jPHoriz);
  jPHoriz.setLayout(jPHorizLayout);
  jPHorizLayout.setHorizontalGroup(
    jPHorizLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
    .addComponent(jPHorizGraph, javax.swing.GroupLayout.Alignment.TRAILING, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
  );
  jPHorizLayout.setVerticalGroup(
    jPHorizLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
    .addGroup(jPHorizLayout.createSequentialGroup()
      .addComponent(jPHorizGraph, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
  );

在 jtpWindows

中插入 jPHoriz

  jtpWindows.addTab("Time", jPHoriz);

在 jframe 中插入 jtpWindows 和其他对象

javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
  layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
  .addComponent(jpMain, javax.swing.GroupLayout.DEFAULT_SIZE, 1689, Short.MAX_VALUE)
  .addComponent(jpReadFile, javax.swing.GroupLayout.DEFAULT_SIZE, 1689, Short.MAX_VALUE)
  .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
    .addGroup(layout.createSequentialGroup()
      .addGap(2, 2, 2)
      .addComponent(jtpWindows)
      .addGap(3, 3, 3)))
);
layout.setVerticalGroup(
  layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
  .addGroup(layout.createSequentialGroup()
    .addComponent(jpMain, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
    .addGap(2, 2, 2)
    .addComponent(jpReadFile, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
    .addContainerGap(752, Short.MAX_VALUE))
  .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
    .addGroup(layout.createSequentialGroup()
      .addGap(56, 56, 56)
      .addComponent(jtpWindows)
      .addGap(0, 0, 0)))
);

这不是代码...只是解释！

[Width, Height]

JFrame.preferredSize = [1689, 806]
javax.swing.JTabbedPane jtpWindows.preferredSize = [1684, 750]
javax.swing.JPanel jPHoriz.preferredSize = [1679, 722]
javax.swing.JPanel jPHorizGraph.preferredSize = [1679, 669]
javax.swing.JPanel jPHorizGraph01.preferredSize = [1679, 323]
javax.swing.JPanel jPHorizGap.preferredSize = [1679, 12]
javax.swing.JPanel jPHorizGraph02.preferredSize = [1679, 323]

会发生什么？ 答：当我在面板中绘图时，我需要面板的尺寸，因为我的绘图是剪切图像...

问题：我需要获取JFrame在Started时的值并修改该值，我该怎么做？

当用户更改 Jframe 的尺寸时，我需要调整 jPHorizGraph01 和 jPHorizGraph02 的宽度和高度

这是我的问题，在骑行方面我放了图表的标题，但是图像被剪掉了！！！

问题我需要使用什么事件来检测 JFrame 大小的变化，以及我需要在 JPanel 中更改哪些值？

第 1 版

问题 2：jPHorizGraph01、jPHorizGap 和 jPHorizGraph02 垂直排列成一排。

jPHorizGap 的高度是永久相等的，不应该改变！！！。 jPHorizGraph01 的高度必须等于 jPHorizGraph02！

如果 jPHorizGraph 的高度发生变化，那么 jPHorizGraph01 和 jPHorizGraph02 的高度必须在这两个对象之间按比例变化！！！

Answer 1

The Java Tutorials: How To Write a Component Listener 说（部分），

对处理组件事件感兴趣的类要么实现此接口及其包含的所有方法，要么扩展抽象ComponentAdapter 类，仅覆盖感兴趣的方法。然后使用组件的addComponentListener 方法向组件注册从该类创建的侦听器对象。当组件的大小、位置或可见性发生变化时，将调用侦听器对象中的相关方法，并将ComponentEvent 传递给它。

在组件被隐藏、可见、移动或调整大小后，Component 对象会触发一个或多个组件事件。

您可能（例如）显示一条带有类似内容的消息

public void componentResized(ComponentEvent e) {
    Component c = e.getComponent();
    displayMessage(String.format("%s - %d, %d", c.getClass().getName(),
            c.getWidth(), c.getHeight()));
}