Example usage for org.eclipse.swt.widgets Display getFocusControl

Introduction

In this page you can find the example usage for org.eclipse.swt.widgets Display getFocusControl.

Prototype

public Control getFocusControl() 

Source Link

Document

Returns the control which currently has keyboard focus, or null if keyboard events are not currently going to any of the controls built by the currently running application.

Usage

From source file:org.eclipse.swt.snippets.Snippet320.java

public static void main(String[] args) {
    final Display display = new Display();
    final Shell shell = new Shell(display);
    shell.setText("Snippet 320");
    shell.setLayout(new GridLayout());
    final Text text = new Text(shell, SWT.SINGLE | SWT.BORDER);
    text.setLayoutData(new GridData(150, SWT.DEFAULT));
    shell.pack();//from   w  ww. j  a va  2s .  com
    shell.open();

    final Shell popupShell = new Shell(display, SWT.ON_TOP);
    popupShell.setLayout(new FillLayout());
    final Table table = new Table(popupShell, SWT.SINGLE);
    for (int i = 0; i < 5; i++) {
        new TableItem(table, SWT.NONE);
    }

    text.addListener(SWT.KeyDown, event -> {
        switch (event.keyCode) {
        case SWT.ARROW_DOWN:
            int index = (table.getSelectionIndex() + 1) % table.getItemCount();
            table.setSelection(index);
            event.doit = false;
            break;
        case SWT.ARROW_UP:
            index = table.getSelectionIndex() - 1;
            if (index < 0)
                index = table.getItemCount() - 1;
            table.setSelection(index);
            event.doit = false;
            break;
        case SWT.CR:
            if (popupShell.isVisible() && table.getSelectionIndex() != -1) {
                text.setText(table.getSelection()[0].getText());
                popupShell.setVisible(false);
            }
            break;
        case SWT.ESC:
            popupShell.setVisible(false);
            break;
        }
    });
    text.addListener(SWT.Modify, event -> {
        String string = text.getText();
        if (string.length() == 0) {
            popupShell.setVisible(false);
        } else {
            TableItem[] items = table.getItems();
            for (int i = 0; i < items.length; i++) {
                items[i].setText(string + '-' + i);
            }
            Rectangle textBounds = display.map(shell, null, text.getBounds());
            popupShell.setBounds(textBounds.x, textBounds.y + textBounds.height, textBounds.width, 150);
            popupShell.setVisible(true);
        }
    });

    table.addListener(SWT.DefaultSelection, event -> {
        text.setText(table.getSelection()[0].getText());
        popupShell.setVisible(false);
    });
    table.addListener(SWT.KeyDown, event -> {
        if (event.keyCode == SWT.ESC) {
            popupShell.setVisible(false);
        }
    });

    Listener focusOutListener = event -> display.asyncExec(() -> {
        if (display.isDisposed())
            return;
        Control control = display.getFocusControl();
        if (control == null || (control != text && control != table)) {
            popupShell.setVisible(false);
        }
    });
    table.addListener(SWT.FocusOut, focusOutListener);
    text.addListener(SWT.FocusOut, focusOutListener);

    shell.addListener(SWT.Move, event -> popupShell.setVisible(false));

    while (!shell.isDisposed()) {
        if (!display.readAndDispatch())
            display.sleep();
    }
    display.dispose();
}

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