michael@0: /* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-
michael@0:  * This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: package org.mozilla.gecko.home;
michael@0: 
michael@0: import org.mozilla.gecko.R;
michael@0: import org.mozilla.gecko.ThumbnailHelper;
michael@0: 
michael@0: import android.content.Context;
michael@0: import android.graphics.Canvas;
michael@0: import android.graphics.Paint;
michael@0: import android.graphics.PorterDuff.Mode;
michael@0: import android.graphics.drawable.Drawable;
michael@0: import android.util.AttributeSet;
michael@0: import android.widget.ImageView;
michael@0: 
michael@0: /**
michael@0:  * A height constrained ImageView to show thumbnails of top and pinned sites.
michael@0:  */
michael@0: public class TopSitesThumbnailView extends ImageView {
michael@0:     private static final String LOGTAG = "GeckoTopSitesThumbnailView";
michael@0: 
michael@0:     // 27.34% opacity filter for the dominant color.
michael@0:     private static final int COLOR_FILTER = 0x46FFFFFF;
michael@0: 
michael@0:     // Default filter color for "Add a bookmark" views.
michael@0:     private static final int DEFAULT_COLOR = 0x46ECF0F3;
michael@0: 
michael@0:     // Stroke width for the border.
michael@0:     private final float mStrokeWidth = getResources().getDisplayMetrics().density * 2;
michael@0: 
michael@0:     // Paint for drawing the border.
michael@0:     private static Paint sBorderPaint;
michael@0: 
michael@0:     // Initializing the static border paint.
michael@0:     static {
michael@0:         sBorderPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
michael@0:         sBorderPaint.setColor(0xFFCFD9E1);
michael@0:         sBorderPaint.setStyle(Paint.Style.STROKE);
michael@0:     }
michael@0: 
michael@0:     public TopSitesThumbnailView(Context context) {
michael@0:         this(context, null);
michael@0: 
michael@0:         // A border will be drawn if needed.
michael@0:         setWillNotDraw(false);
michael@0:     }
michael@0: 
michael@0:     public TopSitesThumbnailView(Context context, AttributeSet attrs) {
michael@0:         this(context, attrs, R.attr.topSitesThumbnailViewStyle);
michael@0:     }
michael@0: 
michael@0:     public TopSitesThumbnailView(Context context, AttributeSet attrs, int defStyle) {
michael@0:         super(context, attrs, defStyle);
michael@0:     }
michael@0: 
michael@0:     /**
michael@0:      * Measure the view to determine the measured width and height.
michael@0:      * The height is constrained by the measured width.
michael@0:      *
michael@0:      * @param widthMeasureSpec horizontal space requirements as imposed by the parent.
michael@0:      * @param heightMeasureSpec vertical space requirements as imposed by the parent, but ignored.
michael@0:      */
michael@0:     @Override
michael@0:     protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
michael@0:         // Default measuring.
michael@0:         super.onMeasure(widthMeasureSpec, heightMeasureSpec);
michael@0: 
michael@0:         // Force the height based on the aspect ratio.
michael@0:         final int width = getMeasuredWidth();
michael@0:         final int height = (int) (width * ThumbnailHelper.THUMBNAIL_ASPECT_RATIO);
michael@0:         setMeasuredDimension(width, height);
michael@0:     }
michael@0: 
michael@0:     /**
michael@0:      * {@inheritDoc}
michael@0:      */
michael@0:     @Override
michael@0:     public void onDraw(Canvas canvas) {
michael@0:         super.onDraw(canvas);
michael@0: 
michael@0:         if (getBackground() == null) {
michael@0:             sBorderPaint.setStrokeWidth(mStrokeWidth);
michael@0:             canvas.drawRect(0, 0, getWidth(), getHeight(), sBorderPaint);
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     /**
michael@0:      * Sets the background to a Drawable by applying the specified color as a filter.
michael@0:      *
michael@0:      * @param color the color filter to apply over the drawable.
michael@0:      */
michael@0:     @Override
michael@0:     public void setBackgroundColor(int color) {
michael@0:         int colorFilter = color == 0 ? DEFAULT_COLOR : color & COLOR_FILTER;
michael@0:         Drawable drawable = getResources().getDrawable(R.drawable.top_sites_thumbnail_bg);
michael@0:         drawable.setColorFilter(colorFilter, Mode.SRC_ATOP);
michael@0:         setBackgroundDrawable(drawable);
michael@0:     }
michael@0: }