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      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.Paint;
     23 
     24 /**
     25  * Delegate implementing the native methods of android.graphics.ComposeShader
     26  *
     27  * Through the layoutlib_create tool, the original native methods of ComposeShader 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 ComposeShader class.
     33  *
     34  * Because this extends {@link Shader_Delegate}, there's no need to use a {@link DelegateManager},
     35  * as all the Shader classes will be added to the manager owned by {@link Shader_Delegate}.
     36  *
     37  * @see Shader_Delegate
     38  *
     39  */
     40 public class ComposeShader_Delegate extends Shader_Delegate {
     41 
     42     // ---- delegate data ----
     43 
     44     // ---- Public Helper methods ----
     45 
     46     @Override
     47     public Paint getJavaPaint() {
     48         // FIXME
     49         return null;
     50     }
     51 
     52     @Override
     53     public boolean isSupported() {
     54         return false;
     55     }
     56 
     57     @Override
     58     public String getSupportMessage() {
     59         return "Compose Shaders are not supported in Layout Preview mode.";
     60     }
     61 
     62 
     63     // ---- native methods ----
     64 
     65     @LayoutlibDelegate
     66     /*package*/ static long nativeCreate(long nativeMatrix, long native_shaderA,
     67             long native_shaderB, int native_mode) {
     68         // FIXME not supported yet.
     69         ComposeShader_Delegate newDelegate = new ComposeShader_Delegate(nativeMatrix);
     70         return sManager.addNewDelegate(newDelegate);
     71     }
     72 
     73 
     74     // ---- Private delegate/helper methods ----
     75 
     76     private ComposeShader_Delegate(long nativeMatrix) {
     77         super(nativeMatrix);
     78     }
     79 }
     80