MidiSettingsDialog.java

package org.herac.tuxguitar.io.midi;

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.Combo;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Group;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Shell;
import org.herac.tuxguitar.gui.TuxGuitar;
import org.herac.tuxguitar.gui.util.DialogUtils;

public class MidiSettingsDialog {

  public static final int MAX_TRANSPOSE = 24;

  public static final int MIN_TRANSPOSE = -24;

  private static final int STATUS_ACCEPTED = 2;

  private static final int STATUS_CANCELLED = 1;

  private static final int STATUS_NONE = 0;

  protected MidiSettings settings;

  protected int status;

  public MidiSettingsDialog() {
    this.settings = new MidiSettings();
  }

  private GridData getGroupData() {
    GridData data = new GridData(SWT.FILL, SWT.FILL, true, true);
    data.minimumWidth = 300;
    return data;
  }

  public MidiSettings open() {
    this.status = STATUS_NONE;

    final Shell dialog = DialogUtils.newDialog(TuxGuitar.instance().getShell(),
        SWT.DIALOG_TRIM | SWT.APPLICATION_MODAL);
    dialog.setLayout(new GridLayout());
    dialog.setText("Options");

    // ------------------TRACK SELECTION------------------
    Group trackGroup = new Group(dialog, SWT.SHADOW_ETCHED_IN);
    trackGroup.setLayout(new GridLayout(2, false));
    trackGroup.setLayoutData(getGroupData());
    trackGroup.setText("Transpose notes");

    // ------------------TRANSPOSE----------------------
    Label transposeLabel = new Label(trackGroup, SWT.NONE);
    transposeLabel.setText("Transpose:");
    transposeLabel
        .setLayoutData(new GridData(SWT.LEFT, SWT.CENTER, true, true));

    final Combo transposeCombo = new Combo(trackGroup, SWT.DROP_DOWN
        | SWT.READ_ONLY);
    transposeCombo
        .setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, true));
    for (int i = MIN_TRANSPOSE; i <= MAX_TRANSPOSE; i++) {
      transposeCombo.add(Integer.toString(i));
    }
    transposeCombo.select(-MIN_TRANSPOSE);

    // ------------------BUTTONS--------------------------
    Composite buttons = new Composite(dialog, SWT.NONE);
    buttons.setLayout(new GridLayout(2, false));
    buttons.setLayoutData(new GridData(SWT.END, SWT.FILL, true, true));

    GridData data = new GridData(SWT.FILL, SWT.FILL, true, true);
    data.minimumWidth = 80;
    data.minimumHeight = 25;

    final Button buttonOK = new Button(buttons, SWT.PUSH);
    buttonOK.setText(TuxGuitar.getProperty("ok"));
    buttonOK.setLayoutData(data);
    buttonOK.addSelectionListener(new SelectionAdapter() {
      public void widgetSelected(SelectionEvent arg0) {
        MidiSettingsDialog.this.status = STATUS_ACCEPTED;
        MidiSettingsDialog.this.settings
            .setTranspose((MIN_TRANSPOSE + transposeCombo.getSelectionIndex()));
        dialog.dispose();
      }
    });

    Button buttonCancel = new Button(buttons, SWT.PUSH);
    buttonCancel.setText(TuxGuitar.getProperty("cancel"));
    buttonCancel.setLayoutData(data);
    buttonCancel.addSelectionListener(new SelectionAdapter() {
      public void widgetSelected(SelectionEvent arg0) {
        MidiSettingsDialog.this.status = STATUS_CANCELLED;
        dialog.dispose();
      }
    });

    dialog.setDefaultButton(buttonOK);

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

    return ((this.status == STATUS_ACCEPTED) ? MidiSettingsDialog.this.settings
        : null);
  }
}