160 lines
4.2 KiB
Java
160 lines
4.2 KiB
Java
import javax.swing.*;
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import java.awt.*;
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import java.io.File;
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import java.util.List;
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public final class FileSelectionPanel extends JPanel {
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private final DefaultListModel<File> fileModel;
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private final JList<File> fileList;
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public FileSelectionPanel() {
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super(new BorderLayout(8, 8));
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fileModel = new DefaultListModel<>();
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fileList = new JList<>(fileModel);
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fileList.setCellRenderer((list, file, index, selected, focus) -> {
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String name = file.getName();
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if (name.isEmpty()) {
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name = file.getAbsolutePath();
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}
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JLabel label = new JLabel(
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name + " — " + getFileSize(file)
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);
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label.setOpaque(true);
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label.setBorder(
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BorderFactory.createEmptyBorder(6, 8, 6, 8)
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);
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if (selected) {
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label.setBackground(list.getSelectionBackground());
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label.setForeground(list.getSelectionForeground());
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} else {
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label.setBackground(list.getBackground());
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label.setForeground(list.getForeground());
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}
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return label;
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});
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JButton addFilesButton = new JButton("Añadir archivos");
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JButton addFolderButton = new JButton("Añadir carpeta");
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JButton removeButton = new JButton("Quitar selección");
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addFilesButton.addActionListener(event -> selectFiles());
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addFolderButton.addActionListener(event -> selectFolder());
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removeButton.addActionListener(event -> removeSelectedFiles());
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JPanel buttons = new JPanel(
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new FlowLayout(FlowLayout.LEFT)
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);
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buttons.add(addFilesButton);
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buttons.add(addFolderButton);
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buttons.add(removeButton);
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add(buttons, BorderLayout.NORTH);
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add(new JScrollPane(fileList), BorderLayout.CENTER);
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}
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private void selectFiles() {
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JFileChooser chooser = new JFileChooser();
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chooser.setMultiSelectionEnabled(true);
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chooser.setFileSelectionMode(
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JFileChooser.FILES_ONLY
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);
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int result = chooser.showOpenDialog(this);
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if (result == JFileChooser.APPROVE_OPTION) {
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for (File file : chooser.getSelectedFiles()) {
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addFile(file);
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}
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}
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}
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private void selectFolder() {
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JFileChooser chooser = new JFileChooser();
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chooser.setFileSelectionMode(
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JFileChooser.DIRECTORIES_ONLY
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);
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int result = chooser.showOpenDialog(this);
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if (result == JFileChooser.APPROVE_OPTION) {
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addFile(chooser.getSelectedFile());
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}
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}
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private void addFile(File file) {
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if (!file.exists()) {
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return;
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}
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for (int i = 0; i < fileModel.size(); i++) {
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if (fileModel.get(i).equals(file)) {
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return;
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}
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}
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if (file.getName().toLowerCase().endsWith(".lbt")) {
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JOptionPane.showMessageDialog(
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this,
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"No se pueden añadir archivos .lbt para comprimir.",
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"Archivo no permitido",
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JOptionPane.WARNING_MESSAGE
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);
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return;
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}
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fileModel.addElement(file);
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}
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private void removeSelectedFiles() {
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List<File> selectedFiles = fileList.getSelectedValuesList();
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for (File file : selectedFiles) {
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fileModel.removeElement(file);
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}
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}
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private String getFileSize(File file) {
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if (file.isDirectory()) {
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return "Carpeta";
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}
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long bytes = file.length();
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if (bytes < 1024) {
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return bytes + " B";
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}
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if (bytes < 1024 * 1024) {
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return String.format("%.1f KB", bytes / 1024.0);
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}
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if (bytes < 1024L * 1024 * 1024) {
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return String.format(
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"%.1f MB",
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bytes / (1024.0 * 1024.0)
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);
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}
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return String.format(
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"%.2f GB",
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bytes / (1024.0 * 1024.0 * 1024.0)
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);
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}
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public List<File> getSelectedFiles() {
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return fileList.getSelectedValuesList();
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}
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}
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