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      1 // Copyright 2013 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 package org.chromium.ui;
      6 
      7 import android.content.Context;
      8 import android.graphics.Color;
      9 import android.util.AttributeSet;
     10 import android.widget.ListView;
     11 
     12 import org.chromium.ui.ColorSuggestionListAdapter.OnColorSuggestionClickListener;
     13 
     14 /**
     15  * Draws a grid of (predefined) colors and allows the user to choose one of
     16  * those colors.
     17  */
     18 public class ColorPickerSimple extends ListView implements OnColorSuggestionClickListener {
     19 
     20     private OnColorChangedListener mOnColorChangedListener;
     21 
     22     private static final int[] DEFAULT_COLORS = {
     23         Color.RED,
     24         Color.CYAN,
     25         Color.BLUE,
     26         Color.GREEN,
     27         Color.MAGENTA,
     28         Color.YELLOW,
     29         Color.BLACK,
     30         Color.WHITE
     31     };
     32 
     33     private static final int[] DEFAULT_COLOR_LABEL_IDS = {
     34         R.string.color_picker_button_red,
     35         R.string.color_picker_button_cyan,
     36         R.string.color_picker_button_blue,
     37         R.string.color_picker_button_green,
     38         R.string.color_picker_button_magenta,
     39         R.string.color_picker_button_yellow,
     40         R.string.color_picker_button_black,
     41         R.string.color_picker_button_white
     42     };
     43 
     44     public ColorPickerSimple(Context context) {
     45         super(context);
     46     }
     47 
     48     public ColorPickerSimple(Context context, AttributeSet attrs) {
     49         super(context, attrs);
     50     }
     51 
     52     public ColorPickerSimple(Context context, AttributeSet attrs, int defStyle) {
     53         super(context, attrs, defStyle);
     54     }
     55 
     56     /**
     57      * Initializes the listener and sets the adapter for the given list of suggestions. If the
     58      * suggestions is null a default set of colors will be used.
     59      *
     60      * @param suggestions The list of suggestions that should be displayed.
     61      * @param onColorChangedListener The listener that gets notified when the user touches
     62      *                               a color.
     63      */
     64     public void init(ColorSuggestion[] suggestions,
     65                      OnColorChangedListener onColorChangedListener) {
     66         mOnColorChangedListener = onColorChangedListener;
     67 
     68         if (suggestions == null) {
     69             suggestions = new ColorSuggestion[DEFAULT_COLORS.length];
     70             for (int i = 0; i < suggestions.length; ++i) {
     71                 suggestions[i] = new ColorSuggestion(DEFAULT_COLORS[i],
     72                         getContext().getString(DEFAULT_COLOR_LABEL_IDS[i]));
     73             }
     74         }
     75 
     76         ColorSuggestionListAdapter adapter = new ColorSuggestionListAdapter(
     77                 getContext(), suggestions);
     78         adapter.setOnColorSuggestionClickListener(this);
     79         setAdapter(adapter);
     80     }
     81 
     82     @Override
     83     public void onColorSuggestionClick(ColorSuggestion suggestion) {
     84         mOnColorChangedListener.onColorChanged(suggestion.mColor);
     85     }
     86 }
     87