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.AvoidXfermode
26  *
27  * Through the layoutlib_create tool, the original native methods of AvoidXfermode have been
28  * replaced 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 AvoidXfermode class.
33  *
34  * Because this extends {@link Xfermode_Delegate}, there's no need to use a
35  * {@link DelegateManager}, as all the PathEffect classes will be added to the manager owned by
36  * {@link Xfermode_Delegate}.
37  *
38  */
39 public class AvoidXfermode_Delegate extends Xfermode_Delegate {
40 
41     // ---- delegate data ----
42 
43     // ---- Public Helper methods ----
44 
45     @Override
getComposite(int alpha)46     public Composite getComposite(int alpha) {
47         // FIXME
48         return null;
49     }
50 
51     @Override
isSupported()52     public boolean isSupported() {
53         return false;
54     }
55 
56     @Override
getSupportMessage()57     public String getSupportMessage() {
58         return "Avoid Xfermodes are not supported in Layout Preview mode.";
59     }
60 
61     // ---- native methods ----
62 
63     @LayoutlibDelegate
nativeCreate(int opColor, int tolerance, int nativeMode)64     /*package*/ static long nativeCreate(int opColor, int tolerance, int nativeMode) {
65         AvoidXfermode_Delegate newDelegate = new AvoidXfermode_Delegate();
66         return sManager.addNewDelegate(newDelegate);
67     }
68 
69     // ---- Private delegate/helper methods ----
70 }
71