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      1 /*
      2  * Copyright (C) 2008 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.camera;
     18 
     19 import com.android.gallery.R;
     20 
     21 import android.content.Context;
     22 import android.graphics.Canvas;
     23 import android.graphics.Paint;
     24 import android.graphics.RectF;
     25 import android.text.Layout;
     26 import android.util.AttributeSet;
     27 import android.widget.TextView;
     28 
     29 /**
     30  * TextView that draws a bubble behind the text. We cannot use a
     31  * LineBackgroundSpan because we want to make the bubble taller than the text
     32  * and TextView's clip is too aggressive.
     33  */
     34 public class ActionMenuButton extends TextView {
     35     private static final int CORNER_RADIUS = 8;
     36     private static final int PADDING_H = 5;
     37     private static final int PADDING_V = 1;
     38 
     39     private final RectF mRect = new RectF();
     40     private Paint mPaint;
     41 
     42     public ActionMenuButton(Context context) {
     43         super(context);
     44         init();
     45     }
     46 
     47     public ActionMenuButton(Context context, AttributeSet attrs) {
     48         super(context, attrs);
     49         init();
     50     }
     51 
     52     public ActionMenuButton(Context context, AttributeSet attrs, int defStyle) {
     53         super(context, attrs, defStyle);
     54         init();
     55     }
     56 
     57     private void init() {
     58         setFocusable(true);
     59         // We need extra padding below to prevent the bubble being cut.
     60         setPadding(PADDING_H, 0, PADDING_H, PADDING_V);
     61 
     62         mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
     63         mPaint.setColor(getContext().getResources()
     64                 .getColor(R.color.bubble_dark_background));
     65     }
     66 
     67     @Override
     68     protected void drawableStateChanged() {
     69         invalidate();
     70         super.drawableStateChanged();
     71     }
     72 
     73     @Override
     74     public void draw(Canvas canvas) {
     75         final Layout layout = getLayout();
     76         final RectF rect = mRect;
     77         final int left = getCompoundPaddingLeft();
     78         final int top = getExtendedPaddingTop();
     79 
     80         rect.set(left + layout.getLineLeft(0) - PADDING_H,
     81                  top + layout.getLineTop(0) - PADDING_V,
     82                  Math.min(left + layout.getLineRight(0) + PADDING_H,
     83                           mScrollX + mRight - mLeft),
     84                  top + layout.getLineBottom(0) + PADDING_V);
     85         canvas.drawRoundRect(rect, CORNER_RADIUS, CORNER_RADIUS, mPaint);
     86 
     87         super.draw(canvas);
     88     }
     89 }
     90