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 android.graphics; 18 19 import com.android.layoutlib.bridge.impl.DelegateManager; 20 import com.android.tools.layoutlib.annotations.LayoutlibDelegate; 21 22 import java.awt.Composite; 23 24 /** 25 * Delegate implementing the native methods of android.graphics.Xfermode 26 * 27 * Through the layoutlib_create tool, the original native methods of Xfermode have been replaced 28 * by calls to methods of the same name in this delegate class. 29 * 30 * This class behaves like the original native implementation, but in Java, keeping previously 31 * native data into its own objects and mapping them to int that are sent back and forth between 32 * it and the original Xfermode class. 33 * 34 * This also serve as a base class for all Xfermode delegate classes. 35 * 36 * @see DelegateManager 37 * 38 */ 39 public abstract class Xfermode_Delegate { 40 41 // ---- delegate manager ---- 42 protected static final DelegateManager<Xfermode_Delegate> sManager = 43 new DelegateManager<Xfermode_Delegate>(Xfermode_Delegate.class); 44 45 // ---- delegate helper data ---- 46 47 // ---- delegate data ---- 48 49 // ---- Public Helper methods ---- 50 getDelegate(long native_instance)51 public static Xfermode_Delegate getDelegate(long native_instance) { 52 return sManager.getDelegate(native_instance); 53 } 54 getComposite(int alpha)55 public abstract Composite getComposite(int alpha); isSupported()56 public abstract boolean isSupported(); getSupportMessage()57 public abstract String getSupportMessage(); 58 59 60 // ---- native methods ---- 61 62 @LayoutlibDelegate finalizer(long native_instance)63 /*package*/ static void finalizer(long native_instance) { 64 sManager.removeJavaReferenceFor(native_instance); 65 } 66 67 // ---- Private delegate/helper methods ---- 68 69 } 70