停止缩放JPanel

时间：2017-03-16 13:13:12

标签： java swing

编辑1：

MigLayout的罐子是：

https://oss.sonatype.org/content/repositories/snapshots/com/miglayout/miglayout-core/5.1-SNAPSHOT/miglayout-core-5.1-20170315.230019-713.jar

https://oss.sonatype.org/content/repositories/snapshots/com/miglayout/miglayout-swing/5.1-SNAPSHOT/miglayout-swing-5.1-20170315.230038-713.jar

OP：

我有一个JPanel作为Java Swing应用程序的“主屏幕”。它不可调整大小。在这个主屏幕中，我有按钮将用户引导到应用程序的不同功能/部分，每个功能都在不同的JPanel中。我使用CardLayout组织这些面板，将它们放在JPanel panelCentro中，然后将此面板添加到主屏幕的contentPane中。

在主框架中：

panelCentro.setLayout(new CardLayout());
//getContentPane().setLayout(null);
getContentPane().add(panelCentro);

panelCentro有背景图片。我覆盖了此面板的paintComponent方法，以绘制图像。

只有在null中使用panelCentro作为布局管理器时，才能正常工作。问题在于功能面板应该接受调整大小。

当调整大小时，主屏幕容器也会调整大小，如果我使用一些布局管理器来管理panelCentro，图像也会调整大小，因为（我猜）布局管理器会调用{因此，{1}}调用repaint()来绘制背景。

但是，请记住主屏幕不可调整大小，当我单击“返回”按钮返回主屏幕时，它将返回原始大小，并且在缩放完成之前将显示背景图像，因此，扭曲。

在这里你有一个SSCCE，以某种方式显示图像是如何扭曲的。图像如下所示。下载并将其重命名为“back.png”，并将其移至项目的paintComponent()目录。最大化窗口，继续单击“切换”按钮，每次显示面板时图像都会展开（您注意到按钮持续向下移动），并且在大约10次单击时，它会停止调整大小。 

img

我想要实现的目标是：

  1. 显示功能面板时，显示背景可调整大小。
  2. 返回主屏幕时，在中间找到框架，然后立即将其调整为原始未缩放尺寸，或者在正确缩放时不显示。

    3. 我现在所做的是使用脏布局和脏手工作（听import java.awt.CardLayout; import java.awt.Color; import java.awt.ComponentOrientation; import java.awt.Dimension; import java.awt.Font; import java.awt.Graphics; import java.awt.GraphicsEnvironment; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.ButtonGroup; import javax.swing.ImageIcon; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JList; import javax.swing.JPanel; import javax.swing.JProgressBar; import javax.swing.JRadioButton; import javax.swing.JScrollPane; import javax.swing.SwingConstants; import javax.swing.SwingUtilities; import javax.swing.UIManager; import javax.swing.border.LineBorder; import net.miginfocom.swing.MigLayout; public class AutoResizingProblem extends JFrame { private static final Font ARIAL_PLAIN_15 = new Font("Arial", Font.PLAIN, 15); private static final Font ARIAL_BOLD_14 = new Font("Arial", Font.BOLD, 14); //FONT++ private static final Font ARIAL_PLAIN_14 = new Font("Arial", Font.PLAIN, 14); //font++ private static final Font CONSOLAS_PLAIN_14 = new Font("Consolas", Font.PLAIN, 14); //FONT++ private static final Font ARIAL_PLAIN_13 = new Font("Arial", Font.PLAIN, 13);//font++ private JPanel panel2; public AutoResizingProblem() { begin(); } private void begin() { setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); getContentPane().setLayout(new MigLayout("insets 5, fillx", "[]", "[]5[]")); final JPanel content = new JPanel(); getContentPane().add(content, "cell 0 0, grow"); final JPanel panel = new JPanel(); panel.setLayout(new MigLayout("insets 5 5 5 5", "[fill, grow]5[300!]", "[]10[]5[fill, grow]5[]5[]")); panel.setOpaque(false); panel.setVisible(true); final JLabel lblreconstruccinDelRegistro = new JLabel("<html>Reconstrucci\u00F3n del Registro de Env\u00EDos y Respuestas</html>"); lblreconstruccinDelRegistro.setToolTipText("<html>Reconstrucci\u00F3n del Registro de Env\u00EDos y Respuestas</html>"); lblreconstruccinDelRegistro.setOpaque(true); lblreconstruccinDelRegistro.setHorizontalTextPosition(SwingConstants.CENTER); lblreconstruccinDelRegistro.setHorizontalAlignment(SwingConstants.CENTER); lblreconstruccinDelRegistro.setForeground(Color.BLACK); lblreconstruccinDelRegistro.setFont(ARIAL_PLAIN_15); lblreconstruccinDelRegistro.setComponentOrientation(ComponentOrientation.RIGHT_TO_LEFT); lblreconstruccinDelRegistro.setBorder(new LineBorder(Color.GRAY)); lblreconstruccinDelRegistro.setBackground(UIManager.getColor("Menu.background")); panel.add(lblreconstruccinDelRegistro, "cell 0 0, span 2, h 25!, grow"); JLabel lblSeguimiento = new JLabel("Seguimiento actual:"); lblSeguimiento.setToolTipText("Seguimiento actual"); lblSeguimiento.setFont(ARIAL_BOLD_14); panel.add(lblSeguimiento, "cell 0 1, split 3, h 25!"); JRadioButton rbMantener = new JRadioButton(); rbMantener.setText("Mantener"); rbMantener.setFont(ARIAL_PLAIN_14); panel.add(rbMantener, ""); //add after the label of Seuigimiento, same cell. JRadioButton rbEliminar = new JRadioButton(); rbEliminar.setText("Eliminar"); rbEliminar.setFont(ARIAL_PLAIN_14); panel.add(rbEliminar, "grow"); ButtonGroup group = new ButtonGroup(); group.add(rbMantener); group.add(rbEliminar); JButton btnIniciarRBD = new JButton("Iniciar Reconstrucci\u00F3n"); btnIniciarRBD.setFont(ARIAL_PLAIN_14); panel.add(btnIniciarRBD, "cell 1 1, gapleft push, h 30!, gapright 5"); JPanel panelListasPorProcesar = new JPanel(); panelListasPorProcesar.setLayout(new MigLayout("insets 0 0 0 0, fillx, debug","[50%]5[50%]", "[25!]5[45%]5[45%]")); panelListasPorProcesar.setOpaque(false); panelListasPorProcesar.setBorder(null); // panelListasPorProcesar.setBounds(10, 100, 440, 270); panel.add(panelListasPorProcesar, "cell 0 2, grow"); // Label "Número de ficheros por procesar" JLabel lblNmeroDeFicherosPorProcesar = new JLabel(); lblNmeroDeFicherosPorProcesar.setFont(ARIAL_BOLD_14); panelListasPorProcesar.add(lblNmeroDeFicherosPorProcesar, "cell 0 0, grow, span 2"); JLabel lblBuznDeEntrada = new JLabel(); lblBuznDeEntrada.setFont(ARIAL_PLAIN_14); ; panelListasPorProcesar.add(lblBuznDeEntrada, "cell 0 1, split 2, flowy, h 25!, grow"); final JList listaRB01 = new JList(); listaRB01.setOpaque(true); listaRB01.setBorder(null); listaRB01.setFont(CONSOLAS_PLAIN_14); JScrollPane spRB01 = new JScrollPane(); spRB01.getViewport().setOpaque(false); spRB01.setViewportView(listaRB01); panelListasPorProcesar.add(spRB01, "cell 0 1, grow"); JLabel lblFicherosRnt = new JLabel(); lblFicherosRnt.setFont(ARIAL_PLAIN_14); panelListasPorProcesar.add(lblFicherosRnt, "cell 1 1, flowy, split 2, h 25!, grow"); JList listaRB02 = new JList(); listaRB02.setOpaque(true); listaRB02.setBorder(null); listaRB02.setFont(CONSOLAS_PLAIN_14); JScrollPane spRB02 = new JScrollPane(); spRB02.getViewport().setOpaque(false); spRB02.setViewportView(listaRB02); panelListasPorProcesar.add(spRB02, "cell 1 1, grow"); JLabel lblFicherosDcl = new JLabel(); lblFicherosDcl.setFont(ARIAL_PLAIN_14); panelListasPorProcesar.add(lblFicherosDcl, "cell 0 2, split 2, flowy, h 25!, grow"); // Lista "Ficheros DCL" JList listaRB03 = new JList(); listaRB03.setOpaque(true); listaRB03.setFont(CONSOLAS_PLAIN_14); JScrollPane spRB03 = new JScrollPane(); spRB03.getViewport().setOpaque(false); spRB03.setViewportView(listaRB03); // panelListasPorProcesar.add(spRB03); panelListasPorProcesar.add(spRB03, "cell 0 2, grow"); JLabel lblFicherosRlc = new JLabel(); lblFicherosRlc.setFont(ARIAL_PLAIN_14); panelListasPorProcesar.add(lblFicherosRlc, "cell 1 2, split 2, flowy, h 25!, grow"); // Lista "Ficheros RLC" JList listaRB04 = new JList(); listaRB04.setOpaque(true); listaRB04.setBorder(null); listaRB04.setFont(CONSOLAS_PLAIN_14); JScrollPane spRB04 = new JScrollPane(); spRB04.getViewport().setOpaque(false); spRB04.setViewportView(listaRB04); panelListasPorProcesar.add(spRB04, "cell 1 2, grow"); JLabel lblNmeroDeFicherosProcesados = new JLabel(); lblNmeroDeFicherosProcesados.setFont(ARIAL_BOLD_14); panel.add(lblNmeroDeFicherosProcesados, "cell 1 2, grow, split 2, flowy, align left, h 25!"); JList listaRBProcesados = new JList(); listaRBProcesados.setOpaque(true); listaRBProcesados.setBorder(null); listaRBProcesados.setFont(CONSOLAS_PLAIN_14); JScrollPane spRBProcesados = new JScrollPane(); spRBProcesados.setBorder(new LineBorder(Color.DARK_GRAY)); spRBProcesados.getViewport().setOpaque(false); spRBProcesados.setViewportView(listaRBProcesados); panel.add(spRBProcesados, "cell 1 2, grow"); JLabel lblAvance = new JLabel("A long bar"); lblAvance.setFont(ARIAL_PLAIN_14); lblAvance.setForeground(Color.BLACK); panel.add(lblAvance, "cell 0 3, span 2, grow"); JButton button = new JButton("Toggle"); button.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { // TODO Auto-generated method stub CardLayout cl = null; cl = (CardLayout)content.getLayout(); if (panel.isVisible()) { System.out.println("show panel2"); cl.show(content, "panel2"); } else if (panel2.isVisible()) { System.out.println("show panel1"); cl.show(content, "panel1"); } } }); getContentPane().add(button, "cell 0 1, grow"); content.setLayout(new CardLayout()); content.add(panel, "panel1"); panel2 = new JPanel() { @Override public void paintComponent(Graphics g){ Dimension tamanio = getSize(); ImageIcon imagenDeFondo = new ImageIcon("img/back.png"); g.drawImage(imagenDeFondo.getImage(), 0, 0, tamanio.width, tamanio.height, null); setOpaque(false); // super.paintComponent(g); } // @Override // public Dimension getPreferredSize() { // return new Dimension(600,400); // } }; content.add(panel2, "panel2"); // setContentPane(panel); pack(); setVisible(true); } public static void main(String[] args) { SwingUtilities.invokeLater(new Runnable() { @Override public void run() { AutoResizingProblem frame = new AutoResizingProblem(); } }); } } 。但这违背了许多学说。有没有办法用一些布局管理器做这个？如果不可能的话，我想说绝对定位有时是有用的。

    enter image description here

1 个答案:

答案 0 :(得分：1)

代码不是SSCCE - 缺少MigLayout - 所以我无法测试它！

如果您不希望缩放图像，请使用不带大小的drawImage方法：

public void paintComponent(Graphics g) {
    ...
    g.drawImage(imagenDeFondo.getImage(), 0, 0, null);
    ...

这个答案主要基于问题的标题

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