| /******************************************************************************* |
| * Copyright (c) 2008 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.debug.examples.core.midi.launcher; |
| |
| import org.eclipse.core.runtime.CoreException; |
| import org.eclipse.core.runtime.IStatus; |
| import org.eclipse.core.runtime.Status; |
| import org.eclipse.debug.core.DebugEvent; |
| import org.eclipse.debug.examples.core.pda.DebugCorePlugin; |
| |
| /** |
| * Controls the tempo of a sequencer. |
| * |
| * @since 1.0 |
| */ |
| public class TempoControl extends SequencerControl { |
| |
| /** |
| * Constructs a tempo control for the given launch. |
| */ |
| public TempoControl(MidiLaunch launch) { |
| super("Tempo (BPM)", launch); |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.debug.examples.core.midi.launcher.SequencerControl#getValue() |
| */ |
| public String getValue() { |
| float bpm = getSequencer().getTempoInBPM(); |
| return Float.toString(bpm); |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.debug.examples.core.midi.launcher.SequencerControl#isEditable() |
| */ |
| public boolean isEditable() { |
| return getSequencer().isOpen(); |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.debug.examples.core.midi.launcher.SequencerControl#setValue(java.lang.String) |
| */ |
| public IStatus setValue(String newValue) { |
| try { |
| float value = getFloat(newValue); |
| getSequencer().setTempoInBPM(value); |
| fireEvent(new DebugEvent(this, DebugEvent.CHANGE)); |
| return Status.OK_STATUS; |
| } catch (CoreException e) { |
| return e.getStatus(); |
| } |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.debug.examples.core.midi.launcher.SequencerControl#validateValue(java.lang.String) |
| */ |
| public IStatus validateValue(String value) { |
| try { |
| getFloat(value); |
| return Status.OK_STATUS; |
| } catch (CoreException e) { |
| return e.getStatus(); |
| } |
| } |
| |
| /** |
| * Returns a float for the string. |
| * |
| * @param value string |
| * @return float |
| * @throws CoreException if not a valid value |
| */ |
| protected float getFloat(String value) throws CoreException { |
| try { |
| return Float.parseFloat(value); |
| } catch (NumberFormatException e) { |
| throw new CoreException(new Status(IStatus.ERROR, DebugCorePlugin.PLUGIN_ID, "Tempo must be a number", e)); |
| } |
| } |
| |
| } |