Back to project page Musicdroid.
The source code is released under:
GNU General Public License
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/** * Catroid: An on-device visual programming system for Android devices * Copyright (C) 2010-2013 The Catrobat Team * (<http://developer.catrobat.org/credits>) */*from w w w.ja va 2 s. c o 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.content.res.Resources; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.graphics.Canvas; import android.graphics.Paint; import android.graphics.Point; import android.graphics.Rect; import android.graphics.RectF; public class NoteSheetCanvas { private Canvas canvas; public NoteSheetCanvas(Canvas canvas) { this.canvas = canvas; } public int getHeightHalf() { return getHeight() / 2; } public int getWidth() { return canvas.getWidth(); } public int getHeight() { return canvas.getHeight(); } public void drawLine(float startX, float startY, float stopX, float stopY, Paint paint) { canvas.drawLine(startX, startY, stopX, stopY, paint); } public void drawRect(Rect rect, Paint paint) { canvas.drawRect(rect, paint); } public void drawOval(RectF rect, Paint paint) { canvas.drawOval(rect, paint); } public Rect drawBitmap(Resources resources, int bitmapId, int bitmapHeight, int xPosition, int yPosition) { Bitmap bitmap = BitmapFactory.decodeResource(resources, bitmapId); Rect rect = calculateProportionalRect(bitmap, bitmapHeight, xPosition, yPosition); canvas.drawBitmap(bitmap, null, rect, null); return rect; } protected Rect calculateProportionalRect(Bitmap originalPicture, int height, int startXPosition, int yCenterPosition) { int keyPictureWidth = originalPicture.getWidth() * height / originalPicture.getHeight(); Point leftUpperOfRect = new Point(startXPosition, yCenterPosition - height / 2); Point rightBottomOfRect = new Point(startXPosition + keyPictureWidth, yCenterPosition + height / 2); return new Rect(leftUpperOfRect.x, leftUpperOfRect.y, rightBottomOfRect.x, rightBottomOfRect.y); } }