Home | History | Annotate | Download | only in settingslib 
      1 /*
      2  * Copyright (C) 2016 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.settingslib;
     18 
     19 import android.content.Context;
     20 import android.graphics.Canvas;
     21 import android.graphics.Paint;
     22 import android.graphics.drawable.Drawable;
     23 import android.text.style.ImageSpan;
     24 
     25 /**
     26  * An extension of ImageSpan which adds a padding before the image.
     27  */
     28 public class RestrictedLockImageSpan extends ImageSpan {
     29     private Context mContext;
     30     private final float mExtraPadding;
     31     private final Drawable mRestrictedPadlock;
     32 
     33     public RestrictedLockImageSpan(Context context) {
     34         // we are overriding getDrawable, so passing null to super class here.
     35         super((Drawable) null);
     36 
     37         mContext = context;
     38         mExtraPadding = mContext.getResources().getDimensionPixelSize(
     39                 R.dimen.restricted_icon_padding);
     40         mRestrictedPadlock = RestrictedLockUtils.getRestrictedPadlock(mContext);
     41     }
     42 
     43     @Override
     44     public Drawable getDrawable() {
     45         return mRestrictedPadlock;
     46     }
     47 
     48     @Override
     49     public void draw(Canvas canvas, CharSequence text, int start, int end, float x, int top, int y,
     50             int bottom, Paint paint) {
     51         Drawable drawable = getDrawable();
     52         canvas.save();
     53 
     54         // Add extra padding before the padlock.
     55         float transX = x + mExtraPadding;
     56         float transY = (bottom - drawable.getBounds().bottom) / 2.0f;
     57 
     58         canvas.translate(transX, transY);
     59         drawable.draw(canvas);
     60         canvas.restore();
     61     }
     62 
     63     @Override
     64     public int getSize(Paint paint, CharSequence text, int start, int end,
     65             Paint.FontMetricsInt fontMetrics) {
     66         int size = super.getSize(paint, text, start, end, fontMetrics);
     67         size += 2 * mExtraPadding;
     68         return size;
     69     }
     70 }