Android Open Source - Musicdroid Note Body Drawer

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License

The source code is released under:

GNU General Public License

Java Source Code

/**
 *  Catroid: An on-device visual programming system for Android devices
 *  Copyright (C) 2010-2013 The Catrobat Team
 *  (<http://developer.catrobat.org/credits>)
 *//from www.ja va 2  s.co  m
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU Affero General Public License as
 *  published by the Free Software Foundation, either version 3 of the
 *  License, or (at your option) any later version.
 *
 *  An additional term exception under section 7 of the GNU Affero
 *  General Public License, version 3, is available at
 *  http://developer.catrobat.org/license_additional_term
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 *  GNU Affero General Public License for more details.
 *
 *  You should have received a copy of the GNU Affero General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.catrobat.musicdroid.pocketmusic.note.draw;

import android.graphics.Paint;
import android.graphics.Point;
import android.graphics.RectF;

import org.catrobat.musicdroid.pocketmusic.note.MusicalKey;
import org.catrobat.musicdroid.pocketmusic.note.NoteName;
import org.catrobat.musicdroid.pocketmusic.note.symbol.NoteSymbol;

import java.util.LinkedList;
import java.util.List;

public final class NoteBodyDrawer {

    public static final int NOTE_WIDTH_SCALE = 130 / 100;

    private SymbolDrawer symbolDrawer;
    private NoteSheetCanvas noteSheetCanvas;
    private Paint paint;
    private MusicalKey key;
    private int distanceBetweenLines;

  public NoteBodyDrawer(SymbolDrawer symbolDrawer, NoteSheetCanvas noteSheetCanvas, Paint paint, MusicalKey key, int distanceBetweenLines) {
        this.symbolDrawer = symbolDrawer;
        this.noteSheetCanvas = noteSheetCanvas;
        this.paint = paint;
        this.key = key;
        this.distanceBetweenLines = distanceBetweenLines;
  }

  public NotePositionInformation drawBody(NoteSymbol noteSymbol) {
    boolean isStemUpdirected = noteSymbol.isStemUp(key);
        int lineHeight = distanceBetweenLines;
    int noteHeight = lineHeight / 2;
    int noteWidth = noteHeight * NOTE_WIDTH_SCALE;

    Point centerPointOfSpaceForNote = symbolDrawer.getCenterPointForNextSymbol();
    List<RectF> noteSurroundingRects = new LinkedList<RectF>();
    NoteName prevNoteName = null;

    for (NoteName noteName : noteSymbol.getNoteNamesSorted()) {
      Point centerPointOfActualNote = new Point(centerPointOfSpaceForNote);
      centerPointOfActualNote.y += NoteName.calculateDistanceToMiddleLineCountingSignedNotesOnly(key, noteName)
          * noteHeight;
      int left = centerPointOfActualNote.x - noteWidth;
      int top = centerPointOfActualNote.y - noteHeight;
      int right = centerPointOfActualNote.x + noteWidth;
      int bottom = centerPointOfActualNote.y + noteHeight;

      if (prevNoteName != null) {
        int differenceBetweenNotesInHalfTones = Math.abs(NoteName.calculateDistanceCountingNoneSignedNotesOnly(
            prevNoteName, noteName));

        if (differenceBetweenNotesInHalfTones == 1) {
          if (isStemUpdirected) {
            right += 2 * noteWidth;
                        left += 2 * noteWidth;
                    } else {
                        left -= 2 * noteWidth;
            right -= 2 * noteWidth;
          }
        }
      }

      RectF rect = new RectF(left, top, right, bottom);

      noteSurroundingRects.add(rect);
      noteSheetCanvas.drawOval(rect, paint);

      prevNoteName = noteName;
    }

    return new NotePositionInformation(noteSurroundingRects);
  }
}

Java Source Code List

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