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package bjc.utils.gui;
import java.awt.Component;
import java.io.File;
import javax.swing.JFileChooser;
/**
* Utility class for easily prompting user for files.
* @author ben
*
*/
public class SimpleFileChooser {
private static File doOpenFile(Component par, String title,
JFileChooser files) {
files.setDialogTitle(title);
boolean success = false;
while (!success) {
try {
maybeDoOpenFile(par, files);
success = true;
} catch (FileNotChosenException e) {
SimpleDialogs.showError(par, "I/O Error",
"Please pick a file to open");
}
}
return files.getSelectedFile();
}
private static File doSaveFile(Component par, String title,
JFileChooser files) {
files.setDialogTitle(title);
boolean success = false;
while (!success) {
try {
maybeDoSaveFile(par, files);
return files.getSelectedFile();
} catch (FileNotChosenException e) {
SimpleDialogs.showError(par, "I/O Error",
"Please pick a file to save to");
}
}
return files.getSelectedFile();
}
private static void maybeDoSaveFile(Component par, JFileChooser files)
throws FileNotChosenException {
int res = files.showSaveDialog(par);
System.out.println("Result: " + res);
if (res != JFileChooser.APPROVE_OPTION) {
throw new FileNotChosenException();
}
}
private static void maybeDoOpenFile(Component par, JFileChooser files)
throws FileNotChosenException {
int res = files.showSaveDialog(par);
if (res != JFileChooser.APPROVE_OPTION) {
throw new FileNotChosenException();
}
}
/**
* Prompt the user with a "Open File..." dialog.
* Keeps prompting them until they pick a file.
* @param par The component to use as the parent for the dialog.
* @param title The title of the dialog to prompt with.
* @return The file the user has chosen.
*/
public static File getOpenFile(Component par, String title) {
JFileChooser files = new JFileChooser();
return doOpenFile(par, title, files);
}
/**
* Prompt the user with a "Open File..." dialog.
* Keeps prompting them until they pick a file.
* @param par The component to use as the parent for the dialog.
* @param title The title of the dialog to prompt with.
* @param extensions The list of file extensions the file should have.
* @return The file the user has chosen.
*/
public static File getOpenFile(Component par, String title,
String... extensions) {
JFileChooser files = new JFileChooser();
files.addChoosableFileFilter(new ExtensionFileFilter(extensions));
return doOpenFile(par, title, files);
}
/**
* Prompt the user with a "Open File..." dialog.
* @param par The component to use as the parent for the dialog.
* @param title The title of the dialog to prompt with.
* @return The file if the user chose one or null if they didn't.
*/
public static File maybeOpenFile(Component par, String title) {
JFileChooser files = new JFileChooser();
files.setDialogTitle(title);
try {
maybeDoOpenFile(par, files);
} catch (FileNotChosenException e) {
}
return files.getSelectedFile();
}
/**
* Prompt the user with a "Save File..." dialog.
* @param par The component to use as the parent for the dialog.
* @param title The title of the dialog to prompt with.
* @return The file if the user chose one or null if they didn't.
*/
public static File maybeSaveFile(Component par, String title) {
JFileChooser files = new JFileChooser();
files.setDialogTitle(title);
try {
maybeDoSaveFile(par, files);
} catch (FileNotChosenException e) {
}
return files.getSelectedFile();
}
/**
* Prompt the user with a "Save File..." dialog.
*
* @param par The component to use as the parent for the dialog.
* @param title The title of the dialog to prompt with.
* @return The file the user chose.
*/
public static File getSaveFile(Component par, String title) {
JFileChooser files = new JFileChooser();
return doSaveFile(par, title, files);
}
/**
* Prompt the user with a "Save File..." dialog.
*
* @param par The component to use as the parent for the dialog.
* @param title The title of the dialog to prompt with.
* @param extensions The extensions of the files the user can choose.
* @return The file the user chose.
*/
public static File getSaveFile(Component par, String title,
String... extensions) {
JFileChooser files = new JFileChooser();
files.addChoosableFileFilter(new ExtensionFileFilter(extensions));
return doSaveFile(par, title, files);
}
}
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