1 /* 2 * Copyright (C) 2010 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.gallery3d.photoeditor.actions; 18 19 import android.content.Context; 20 import android.util.AttributeSet; 21 22 import com.android.gallery3d.photoeditor.PhotoView; 23 import com.android.gallery3d.photoeditor.filters.RotateFilter; 24 25 /** 26 * An action handling rotate effect. 27 */ 28 public class RotateAction extends EffectAction { 29 30 private static final float DEFAULT_ANGLE = 0.0f; 31 private static final float DEFAULT_ROTATE_SPAN = 360.0f; 32 RotateAction(Context context, AttributeSet attrs)33 public RotateAction(Context context, AttributeSet attrs) { 34 super(context, attrs); 35 } 36 37 @Override prepare()38 public void prepare() { 39 // Disable outputting rotated results and directly rotate photo-view for animations. 40 final RotateFilter filter = new RotateFilter(); 41 disableFilterOutput(); 42 43 final RotateView rotateView = toolKit.addRotateView(); 44 rotateView.setOnRotateChangeListener(new RotateView.OnRotateChangeListener() { 45 46 float rotateDegrees; 47 Runnable queuedTransform; 48 PhotoView photoView = toolKit.getPhotoView(); 49 50 @Override 51 public void onAngleChanged(float degrees, boolean fromUser) { 52 if (fromUser) { 53 rotateDegrees = degrees; 54 transformPhotoView(rotateDegrees); 55 notifyChanged(filter); 56 } 57 } 58 59 @Override 60 public void onStartTrackingTouch() { 61 // no-op 62 } 63 64 @Override 65 public void onStopTrackingTouch() { 66 // Round rotate degrees to multiples of 90 degrees. 67 if (rotateDegrees % 90 != 0) { 68 rotateDegrees = Math.round(rotateDegrees / 90) * 90; 69 } 70 transformPhotoView(rotateDegrees); 71 rotateView.setRotatedAngle(rotateDegrees); 72 filter.setAngle(rotateDegrees); 73 notifyChanged(filter); 74 } 75 76 private void transformPhotoView(final float degrees) { 77 // Remove the outdated rotation change before queuing a new one. 78 if (queuedTransform != null) { 79 photoView.remove(queuedTransform); 80 } 81 queuedTransform = new Runnable() { 82 83 @Override 84 public void run() { 85 photoView.rotatePhoto(degrees); 86 } 87 }; 88 photoView.queue(queuedTransform); 89 } 90 }); 91 rotateView.setRotatedAngle(DEFAULT_ANGLE); 92 rotateView.setRotateSpan(DEFAULT_ROTATE_SPAN); 93 } 94 } 95