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FileDialog Examples

Instances of this class allow the user to navigate the file system and select or enter a file name.

Snippet

FileDialog Snippet

The shape Eclipse's "Define a New Path Variable" and "Add External Web Browser" dialogs use:

a read-write Location field with File.../Folder... buttons that open the system chooser with

{@link SWT#SHEET} and write whatever comes back into the field (null meaning cancelled).

Deliberately no {@code Config.forceEquo()}: in the whole-tree build Config routes the two choosers to the OS on purpose, and that native path is what this snippet exercises. ??? example "FileDialogSnippet.java" 

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package dev.equo;

import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.*;

/**
 * The shape Eclipse's "Define a New Path Variable" and "Add External Web Browser" dialogs use:
 * a read-write Location field with File.../Folder... buttons that open the system chooser with
 * {@link SWT#SHEET} and write whatever comes back into the field (null meaning cancelled).
 *
 * <p>Deliberately no {@code Config.forceEquo()}: in the whole-tree build Config routes the two
 * choosers to the OS on purpose, and that native path is what this snippet exercises.
 */
public class FileDialogSnippet {
    public static void main(String[] args) {
        Display display = new Display();
        Shell shell = new Shell(display);
        shell.setText("FileDialog");
        shell.setLayout(new GridLayout(3, false));

        new Label(shell, SWT.NONE).setText("Location:");
        Text location = new Text(shell, SWT.BORDER);
        location.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false));

        Composite buttons = new Composite(shell, SWT.NONE);
        buttons.setLayout(new GridLayout(2, true));

        Button file = new Button(buttons, SWT.PUSH);
        file.setText("File...");
        file.addListener(SWT.Selection, e -> {
            FileDialog dialog = new FileDialog(shell, SWT.SHEET);
            dialog.setText("Select file");
            dialog.setFilterPath(location.getText());
            String picked = dialog.open();
            System.out.println("FileDialog.open() -> " + picked);
            if (picked != null)
                location.setText(picked);
        });

        Button folder = new Button(buttons, SWT.PUSH);
        folder.setText("Folder...");
        folder.addListener(SWT.Selection, e -> {
            DirectoryDialog dialog = new DirectoryDialog(shell, SWT.SHEET);
            dialog.setText("Select folder");
            dialog.setFilterPath(location.getText());
            String picked = dialog.open();
            System.out.println("DirectoryDialog.open() -> " + picked);
            if (picked != null)
                location.setText(picked);
        });

        shell.setSize(520, 140);
        shell.open();

        while (!shell.isDisposed()) {
            if (!display.readAndDispatch()) display.sleep();
        }
        display.dispose();
    }
}
[View on GitHub :simple-github:](https://github.com/equodev/swt-evolve/blob/main/examples/src/main/java/dev/equo/FileDialogSnippet.java){ .md-button }