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      1 /*
      2  * Copyright (C) 2014 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.systemui.statusbar;
     18 
     19 import android.content.Context;
     20 import android.graphics.Outline;
     21 import android.graphics.Rect;
     22 import android.graphics.RectF;
     23 import android.util.AttributeSet;
     24 import android.view.View;
     25 import android.view.ViewOutlineProvider;
     26 
     27 /**
     28  * Like {@link ExpandableView}, but setting an outline for the height and clipping.
     29  */
     30 public abstract class ExpandableOutlineView extends ExpandableView {
     31 
     32     private final Rect mOutlineRect = new Rect();
     33     private boolean mCustomOutline;
     34 
     35     public ExpandableOutlineView(Context context, AttributeSet attrs) {
     36         super(context, attrs);
     37         setOutlineProvider(new ViewOutlineProvider() {
     38             @Override
     39             public void getOutline(View view, Outline outline) {
     40                 if (!mCustomOutline) {
     41                     outline.setRect(0,
     42                             mClipTopAmount,
     43                             getWidth(),
     44                             Math.max(mActualHeight, mClipTopAmount));
     45                 } else {
     46                     outline.setRect(mOutlineRect);
     47                 }
     48             }
     49         });
     50     }
     51 
     52     @Override
     53     public void setActualHeight(int actualHeight, boolean notifyListeners) {
     54         super.setActualHeight(actualHeight, notifyListeners);
     55         invalidateOutline();
     56     }
     57 
     58     @Override
     59     public void setClipTopAmount(int clipTopAmount) {
     60         super.setClipTopAmount(clipTopAmount);
     61         invalidateOutline();
     62     }
     63 
     64     protected void setOutlineRect(RectF rect) {
     65         if (rect != null) {
     66             setOutlineRect(rect.left, rect.top, rect.right, rect.bottom);
     67         } else {
     68             mCustomOutline = false;
     69             invalidateOutline();
     70         }
     71     }
     72 
     73     protected void setOutlineRect(float left, float top, float right, float bottom) {
     74         mCustomOutline = true;
     75 
     76         mOutlineRect.set((int) left, (int) top, (int) right, (int) bottom);
     77 
     78         // Outlines need to be at least 1 dp
     79         mOutlineRect.bottom = (int) Math.max(top, mOutlineRect.bottom);
     80         mOutlineRect.right = (int) Math.max(left, mOutlineRect.right);
     81 
     82         invalidateOutline();
     83     }
     84 
     85 }
     86