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.videoeditor; 18 19 import android.app.ListActivity; 20 import android.content.Intent; 21 import android.os.Bundle; 22 import android.view.View; 23 import android.widget.ListView; 24 import android.widget.TextView; 25 26 /** 27 * The transitions activity 28 */ 29 public class TransitionsActivity extends ListActivity { 30 // Input transition category 31 public static final String PARAM_AFTER_MEDIA_ITEM_ID = "media_item_id"; 32 public static final String PARAM_TRANSITION_ID = "transition_id"; 33 public static final String PARAM_MINIMUM_DURATION = "min_duration"; 34 public static final String PARAM_DEFAULT_DURATION = "default_duration"; 35 public static final String PARAM_MAXIMUM_DURATION = "max_duration"; 36 37 // Increment transition duration in milliseconds 38 private static final long INCREMENT_TRANSITION = 100; 39 40 // Output transition type 41 public static final String PARAM_TRANSITION_TYPE = "transition"; 42 public static final String PARAM_TRANSITION_DURATION = "duration"; 43 44 // State keys 45 private static final String STATE_KEY_TRANSITION_DURATION = "duration"; 46 47 // Instance variables 48 private TextView mTransitionDurationView; 49 private View mTransitionLeftBtn, mTransitionRightBtn; 50 private TransitionsAdapter mAdapter; 51 private long mMinTransitionDurationMs, mMaxTransitionDurationMs, mTransitionDurationMs; 52 53 /* 54 * {@inheritDoc} 55 */ 56 @Override 57 public void onCreate(Bundle savedInstanceState) { 58 super.onCreate(savedInstanceState); 59 setContentView(R.layout.transition_list_view); 60 setFinishOnTouchOutside(true); 61 62 mTransitionDurationView = (TextView)findViewById(R.id.transition_duration); 63 mTransitionLeftBtn = findViewById(R.id.duration_left); 64 mTransitionRightBtn = findViewById(R.id.duration_right); 65 66 mMinTransitionDurationMs = getIntent().getLongExtra(PARAM_MINIMUM_DURATION, 0); 67 mMinTransitionDurationMs = (mMinTransitionDurationMs / INCREMENT_TRANSITION) * 68 INCREMENT_TRANSITION; 69 70 mMaxTransitionDurationMs = getIntent().getLongExtra(PARAM_MAXIMUM_DURATION, 0); 71 mMaxTransitionDurationMs = (mMaxTransitionDurationMs / INCREMENT_TRANSITION) * 72 INCREMENT_TRANSITION; 73 74 if (savedInstanceState == null) { 75 mTransitionDurationMs = getIntent().getLongExtra(PARAM_DEFAULT_DURATION, 0); 76 } else { 77 mTransitionDurationMs = savedInstanceState.getLong(STATE_KEY_TRANSITION_DURATION); 78 } 79 mTransitionDurationMs = (mTransitionDurationMs / INCREMENT_TRANSITION) * 80 INCREMENT_TRANSITION; 81 82 updateTransitionDuration(); 83 84 // Create the list adapter 85 mAdapter = new TransitionsAdapter(this, getListView()); 86 setListAdapter(mAdapter); 87 88 final int transitionType = getIntent().getIntExtra(PARAM_TRANSITION_TYPE, -1); 89 if (transitionType >= 0) { 90 // Select the current transition 91 final TransitionType[] transitions = mAdapter.getTransitions(); 92 for (int i = 0; i < transitions.length; i++) { 93 if (transitions[i].getType() == transitionType) { 94 setSelection(i); 95 break; 96 } 97 } 98 } 99 } 100 101 /* 102 * {@inheritDoc} 103 */ 104 @Override 105 public void onPause() { 106 super.onPause(); 107 108 if (mAdapter != null) { 109 mAdapter.onPause(); 110 } 111 } 112 113 /* 114 * {@inheritDoc} 115 */ 116 @Override 117 public void onDestroy() { 118 super.onDestroy(); 119 120 if (mAdapter != null) { 121 mAdapter.onDestroy(); 122 } 123 } 124 125 /* 126 * {@inheritDoc} 127 */ 128 @Override 129 public void onSaveInstanceState(Bundle outState) { 130 super.onSaveInstanceState(outState); 131 132 outState.putLong(STATE_KEY_TRANSITION_DURATION, mTransitionDurationMs); 133 } 134 135 /* 136 * {@inheritDoc} 137 */ 138 @Override 139 public void onListItemClick(ListView l, View v, int position, long id) { 140 final Intent extras = new Intent(); 141 extras.putExtra(PARAM_TRANSITION_TYPE, 142 ((TransitionType)mAdapter.getItem(position)).getType()); 143 extras.putExtra(PARAM_AFTER_MEDIA_ITEM_ID, 144 getIntent().getStringExtra(PARAM_AFTER_MEDIA_ITEM_ID)); 145 extras.putExtra(PARAM_TRANSITION_ID, 146 getIntent().getStringExtra(PARAM_TRANSITION_ID)); 147 extras.putExtra(PARAM_TRANSITION_DURATION, mTransitionDurationMs); 148 149 // Release the adapter now 150 mAdapter.onDestroy(); 151 mAdapter = null; 152 153 setResult(RESULT_OK, extras); 154 finish(); 155 } 156 157 /* 158 * {@inheritDoc} 159 */ 160 public void onClickHandler(View target) { 161 switch (target.getId()) { 162 case R.id.duration_left: { 163 if (mTransitionDurationMs > mMinTransitionDurationMs) { 164 mTransitionDurationMs -= INCREMENT_TRANSITION; 165 updateTransitionDuration(); 166 } 167 break; 168 } 169 170 case R.id.duration_right: { 171 if (mTransitionDurationMs < mMaxTransitionDurationMs) { 172 mTransitionDurationMs += INCREMENT_TRANSITION; 173 updateTransitionDuration(); 174 } 175 break; 176 } 177 178 default: { 179 break; 180 } 181 } 182 } 183 184 /* 185 * {@inheritDoc} 186 */ 187 @Override 188 public boolean onSearchRequested() { 189 return false; 190 } 191 192 /** 193 * Update the transition duration and the state of the buttons 194 */ 195 private void updateTransitionDuration() { 196 mTransitionDurationView.setText(getString(R.string.transitions_duration, 197 (((float)mTransitionDurationMs) / 1000))); 198 199 mTransitionLeftBtn.setEnabled(mTransitionDurationMs > mMinTransitionDurationMs); 200 mTransitionRightBtn.setEnabled(mTransitionDurationMs < mMaxTransitionDurationMs); 201 } 202 } 203
