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