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package bjc.utils.gui.awt;
import java.awt.FileDialog;
import java.awt.Frame;
import java.io.File;
import java.io.FilenameFilter;
import bjc.utils.gui.SimpleDialogs;
/**
* A simple way to get the user to pick a file
*
* Built for AWT.
*
* @author ben
*
*/
public class SimpleFileDialog {
/**
* Prompt the user to pick a file to open
*
* @param parent
* The parent of the file picker
* @param title
* The title of the file picker
* @return The file the user picked
*/
public static File getOpenFile(Frame parent, String title) {
return getOpenFile(parent, title, (String[]) null);
}
/**
* Prompt the user to pick a file to open
*
* @param parent
* The parent of the file picker
* @param title
* The title of the file picker
* @param extensions
* The extensions to accept as valid
* @return The file the user picked
*/
public static File getOpenFile(Frame parent, String title,
String... extensions) {
if (parent == null) {
throw new NullPointerException("Parent must not be null");
} else if (title == null) {
throw new NullPointerException("Title must not be null");
}
FileDialog fileDialog =
new FileDialog(parent, title, FileDialog.LOAD);
if (extensions != null) {
FilenameFilter filter = new ExtensionFileFilter(extensions);
fileDialog.setFilenameFilter(filter);
}
fileDialog.setVisible(true);
while (fileDialog.getFile() == null) {
SimpleDialogs.showError(parent, "File I/O Error",
"Please choose a file to open.");
fileDialog.setVisible(true);
}
return fileDialog.getFiles()[0];
}
/**
* Prompt the user to pick a file to save
*
* @param parent
* The parent of the file picker
* @param title
* The title of the file picker
* @return The file the user picked
*/
public static File getSaveFile(Frame parent, String title) {
return getSaveFile(parent, title, (String[]) null);
}
/**
* Prompt the user to pick a file to save
*
* @param parent
* The parent of the file picker
* @param title
* The title of the file picker
* @param extensions
* The extensions to accept as valid
* @return The file the user picked
*/
public static File getSaveFile(Frame parent, String title,
String... extensions) {
if (parent == null) {
throw new NullPointerException("Parent must not be null");
} else if (title == null) {
throw new NullPointerException("Title must not be null");
}
FileDialog fileDialog =
new FileDialog(parent, title, FileDialog.SAVE);
if (extensions != null) {
FilenameFilter filter = new ExtensionFileFilter(extensions);
fileDialog.setFilenameFilter(filter);
}
fileDialog.setVisible(true);
while (fileDialog.getFile() == null) {
SimpleDialogs.showError(parent, "File I/O Error",
"Please choose a file to save to.");
fileDialog.setVisible(true);
}
return fileDialog.getFiles()[0];
}
}
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