ConfirmDialog.java

package org.herac.tuxguitar.gui.util;

import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Shell;
import org.herac.tuxguitar.gui.TuxGuitar;

public class ConfirmDialog {

  public static int BUTTON_CANCEL = 0x01;
  public static int BUTTON_NO = 0x04;
  public static int BUTTON_YES = 0x02;

  public static int STATUS_CANCEL = 3;
  public static int STATUS_NO = 2;
  public static int STATUS_YES = 1;

  protected Shell dialog;
  private String message;
  protected int status;

  public ConfirmDialog(String message) {
    this.message = message;
  }

  private void addCloseButton(String text, final int value, Composite parent,
      boolean defaultButton) {
    Button button = new Button(parent, SWT.PUSH);
    button.setLayoutData(getButtonData());
    button.setText(text);
    button.addSelectionListener(new SelectionAdapter() {
      @Override
      public void widgetSelected(SelectionEvent arg0) {
        ConfirmDialog.this.dialog.dispose();
        ConfirmDialog.this.status = value;
      }
    });
    if (defaultButton) {
      this.dialog.setDefaultButton(button);
    }
  }

  public int confirm(int style, int defaultButton) {
    Shell parent = TuxGuitar.instance().getShell();
    this.dialog = DialogUtils.newDialog(parent, SWT.DIALOG_TRIM
        | SWT.APPLICATION_MODAL);
    this.dialog.setLayout(new GridLayout(1, true));

    // ========================================================================
    Composite labelComposite = new Composite(this.dialog, SWT.NONE);
    labelComposite.setLayout(new GridLayout(2, false));
    labelComposite.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));

    Label icon = new Label(labelComposite, SWT.NONE);
    Label message = new Label(labelComposite, SWT.NONE);
    icon.setImage(parent.getDisplay().getSystemImage(SWT.ICON_QUESTION));
    message.setText(this.message);

    // ========================================================================
    GridLayout buttonsLayout = new GridLayout(0, false);
    Composite buttonsComposite = new Composite(this.dialog, SWT.NONE);
    buttonsComposite.setLayout(buttonsLayout);
    buttonsComposite.setLayoutData(new GridData(SWT.END, SWT.FILL, true, true));

    if ((style & BUTTON_YES) != 0) {
      addCloseButton(TuxGuitar.getProperty("yes"), STATUS_YES,
          buttonsComposite, (defaultButton == BUTTON_YES));
      buttonsLayout.numColumns++;
    }
    if ((style & BUTTON_NO) != 0) {
      addCloseButton(TuxGuitar.getProperty("no"), STATUS_NO, buttonsComposite,
          (defaultButton == BUTTON_NO));
      buttonsLayout.numColumns++;
    }
    if ((style & BUTTON_CANCEL) != 0) {
      addCloseButton(TuxGuitar.getProperty("cancel"), STATUS_CANCEL,
          buttonsComposite, (defaultButton == BUTTON_CANCEL));
      buttonsLayout.numColumns++;
    }

    DialogUtils.openDialog(this.dialog, DialogUtils.OPEN_STYLE_CENTER
        | DialogUtils.OPEN_STYLE_PACK | DialogUtils.OPEN_STYLE_WAIT);

    return this.status;
  }

  private GridData getButtonData() {
    GridData data = new GridData(SWT.FILL, SWT.FILL, true, true);
    data.minimumWidth = 80;
    data.minimumHeight = 25;
    return data;
  }

  public void setDefaultStatus(int status) {
    this.status = status;
  }

}