| 1 | package com.googlecode.lanterna.gui2.dialogs; |
| 2 | |
| 3 | import com.googlecode.lanterna.TerminalTextUtils; |
| 4 | import com.googlecode.lanterna.TerminalSize; |
| 5 | import com.googlecode.lanterna.gui2.*; |
| 6 | |
| 7 | import java.io.File; |
| 8 | import java.util.Arrays; |
| 9 | import java.util.Comparator; |
| 10 | |
| 11 | /** |
| 12 | * Dialog that allows the user to iterate the file system and pick file to open/save |
| 13 | * |
| 14 | * @author Martin |
| 15 | */ |
| 16 | public class FileDialog extends DialogWindow { |
| 17 | |
| 18 | private final ActionListBox fileListBox; |
| 19 | private final ActionListBox directoryListBox; |
| 20 | private final TextBox fileBox; |
| 21 | private final Button okButton; |
| 22 | private final boolean showHiddenFilesAndDirs; |
| 23 | |
| 24 | private File directory; |
| 25 | private File selectedFile; |
| 26 | |
| 27 | /** |
| 28 | * Default constructor for {@code FileDialog} |
| 29 | * @param title Title of the dialog |
| 30 | * @param description Description of the dialog, is displayed at the top of the content area |
| 31 | * @param actionLabel Label to use on the "confirm" button, for example "open" or "save" |
| 32 | * @param dialogSize Rough estimation of how big you want the dialog to be |
| 33 | * @param showHiddenFilesAndDirs If {@code true}, hidden files and directories will be visible |
| 34 | * @param selectedObject Initially selected file node |
| 35 | */ |
| 36 | public FileDialog( |
| 37 | String title, |
| 38 | String description, |
| 39 | String actionLabel, |
| 40 | TerminalSize dialogSize, |
| 41 | boolean showHiddenFilesAndDirs, |
| 42 | File selectedObject) { |
| 43 | super(title); |
| 44 | this.selectedFile = null; |
| 45 | this.showHiddenFilesAndDirs = showHiddenFilesAndDirs; |
| 46 | |
| 47 | if(selectedObject == null || !selectedObject.exists()) { |
| 48 | selectedObject = new File("").getAbsoluteFile(); |
| 49 | } |
| 50 | selectedObject = selectedObject.getAbsoluteFile(); |
| 51 | |
| 52 | Panel contentPane = new Panel(); |
| 53 | contentPane.setLayoutManager(new GridLayout(2)); |
| 54 | |
| 55 | if(description != null) { |
| 56 | new Label(description) |
| 57 | .setLayoutData( |
| 58 | GridLayout.createLayoutData( |
| 59 | GridLayout.Alignment.BEGINNING, |
| 60 | GridLayout.Alignment.CENTER, |
| 61 | false, |
| 62 | false, |
| 63 | 2, |
| 64 | 1)) |
| 65 | .addTo(contentPane); |
| 66 | } |
| 67 | |
| 68 | int unitWidth = dialogSize.getColumns() / 3; |
| 69 | int unitHeight = dialogSize.getRows(); |
| 70 | |
| 71 | new FileSystemLocationLabel() |
| 72 | .setLayoutData(GridLayout.createLayoutData( |
| 73 | GridLayout.Alignment.FILL, |
| 74 | GridLayout.Alignment.CENTER, |
| 75 | true, |
| 76 | false, |
| 77 | 2, |
| 78 | 1)) |
| 79 | .addTo(contentPane); |
| 80 | |
| 81 | fileListBox = new ActionListBox(new TerminalSize(unitWidth * 2, unitHeight)); |
| 82 | fileListBox.withBorder(Borders.singleLine()) |
| 83 | .setLayoutData(GridLayout.createLayoutData( |
| 84 | GridLayout.Alignment.BEGINNING, |
| 85 | GridLayout.Alignment.CENTER, |
| 86 | false, |
| 87 | false)) |
| 88 | .addTo(contentPane); |
| 89 | directoryListBox = new ActionListBox(new TerminalSize(unitWidth, unitHeight)); |
| 90 | directoryListBox.withBorder(Borders.singleLine()) |
| 91 | .addTo(contentPane); |
| 92 | |
| 93 | fileBox = new TextBox() |
| 94 | .setLayoutData(GridLayout.createLayoutData( |
| 95 | GridLayout.Alignment.FILL, |
| 96 | GridLayout.Alignment.CENTER, |
| 97 | true, |
| 98 | false, |
| 99 | 2, |
| 100 | 1)) |
| 101 | .addTo(contentPane); |
| 102 | |
| 103 | new Separator(Direction.HORIZONTAL) |
| 104 | .setLayoutData( |
| 105 | GridLayout.createLayoutData( |
| 106 | GridLayout.Alignment.FILL, |
| 107 | GridLayout.Alignment.CENTER, |
| 108 | true, |
| 109 | false, |
| 110 | 2, |
| 111 | 1)) |
| 112 | .addTo(contentPane); |
| 113 | |
| 114 | okButton = new Button(actionLabel, new OkHandler()); |
| 115 | Panels.grid(2, |
| 116 | okButton, |
| 117 | new Button(LocalizedString.Cancel.toString(), new CancelHandler())) |
| 118 | .setLayoutData(GridLayout.createLayoutData(GridLayout.Alignment.END, GridLayout.Alignment.CENTER, false, false, 2, 1)) |
| 119 | .addTo(contentPane); |
| 120 | |
| 121 | if(selectedObject.isFile()) { |
| 122 | directory = selectedObject.getParentFile(); |
| 123 | fileBox.setText(selectedObject.getName()); |
| 124 | } |
| 125 | else if(selectedObject.isDirectory()) { |
| 126 | directory = selectedObject; |
| 127 | } |
| 128 | |
| 129 | reloadViews(directory); |
| 130 | setComponent(contentPane); |
| 131 | } |
| 132 | |
| 133 | /** |
| 134 | * {@inheritDoc} |
| 135 | * @param textGUI Text GUI to add the dialog to |
| 136 | * @return The file which was selected in the dialog or {@code null} if the dialog was cancelled |
| 137 | */ |
| 138 | @Override |
| 139 | public File showDialog(WindowBasedTextGUI textGUI) { |
| 140 | selectedFile = null; |
| 141 | super.showDialog(textGUI); |
| 142 | return selectedFile; |
| 143 | } |
| 144 | |
| 145 | private class OkHandler implements Runnable { |
| 146 | @Override |
| 147 | public void run() { |
| 148 | if(!fileBox.getText().isEmpty()) { |
| 149 | selectedFile = new File(directory, fileBox.getText()); |
| 150 | close(); |
| 151 | } |
| 152 | else { |
| 153 | MessageDialog.showMessageDialog(getTextGUI(), "Error", "Please select a valid file name", MessageDialogButton.OK); |
| 154 | } |
| 155 | } |
| 156 | } |
| 157 | |
| 158 | private class CancelHandler implements Runnable { |
| 159 | @Override |
| 160 | public void run() { |
| 161 | selectedFile = null; |
| 162 | close(); |
| 163 | } |
| 164 | } |
| 165 | |
| 166 | private class DoNothing implements Runnable { |
| 167 | @Override |
| 168 | public void run() { |
| 169 | } |
| 170 | } |
| 171 | |
| 172 | private void reloadViews(final File directory) { |
| 173 | directoryListBox.clearItems(); |
| 174 | fileListBox.clearItems(); |
| 175 | File []entries = directory.listFiles(); |
| 176 | if(entries == null) { |
| 177 | return; |
| 178 | } |
| 179 | Arrays.sort(entries, new Comparator<File>() { |
| 180 | @Override |
| 181 | public int compare(File o1, File o2) { |
| 182 | return o1.getName().toLowerCase().compareTo(o2.getName().toLowerCase()); |
| 183 | } |
| 184 | }); |
| 185 | directoryListBox.addItem("..", new Runnable() { |
| 186 | @Override |
| 187 | public void run() { |
| 188 | FileDialog.this.directory = directory.getAbsoluteFile().getParentFile(); |
| 189 | reloadViews(directory.getAbsoluteFile().getParentFile()); |
| 190 | } |
| 191 | }); |
| 192 | for(final File entry: entries) { |
| 193 | if(entry.isHidden() && !showHiddenFilesAndDirs) { |
| 194 | continue; |
| 195 | } |
| 196 | if(entry.isDirectory()) { |
| 197 | directoryListBox.addItem(entry.getName(), new Runnable() { |
| 198 | @Override |
| 199 | public void run() { |
| 200 | FileDialog.this.directory = entry; |
| 201 | reloadViews(entry); |
| 202 | } |
| 203 | }); |
| 204 | } |
| 205 | else { |
| 206 | fileListBox.addItem(entry.getName(), new Runnable() { |
| 207 | @Override |
| 208 | public void run() { |
| 209 | fileBox.setText(entry.getName()); |
| 210 | setFocusedInteractable(okButton); |
| 211 | } |
| 212 | }); |
| 213 | } |
| 214 | } |
| 215 | if(fileListBox.isEmpty()) { |
| 216 | fileListBox.addItem("<empty>", new DoNothing()); |
| 217 | } |
| 218 | } |
| 219 | |
| 220 | private class FileSystemLocationLabel extends Label { |
| 221 | public FileSystemLocationLabel() { |
| 222 | super(""); |
| 223 | setPreferredSize(TerminalSize.ONE); |
| 224 | } |
| 225 | |
| 226 | @Override |
| 227 | public void onBeforeDrawing() { |
| 228 | TerminalSize area = getSize(); |
| 229 | String absolutePath = directory.getAbsolutePath(); |
| 230 | int absolutePathLengthInColumns = TerminalTextUtils.getColumnWidth(absolutePath); |
| 231 | if(area.getColumns() < absolutePathLengthInColumns) { |
| 232 | absolutePath = absolutePath.substring(absolutePathLengthInColumns - area.getColumns()); |
| 233 | absolutePath = "..." + absolutePath.substring(Math.min(absolutePathLengthInColumns, 3)); |
| 234 | } |
| 235 | setText(absolutePath); |
| 236 | } |
| 237 | } |
| 238 | } |