src/ui/android/java/src/org/chromium/ui/ColorSuggestionListAdapter.java

   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.graphics.drawable.GradientDrawable;
  10 import android.graphics.drawable.LayerDrawable;
  11 import android.text.TextUtils;
  12 import android.view.View;
  13 import android.view.ViewGroup;
  14 import android.widget.AbsListView;
  15 import android.widget.BaseAdapter;
  16 import android.widget.LinearLayout;
  17
  18 import org.chromium.base.ApiCompatibilityUtils;
  19
  20 /**
  21  * The adapter used to populate ColorPickerSimple.
  22  */
  23 public class ColorSuggestionListAdapter extends BaseAdapter implements View.OnClickListener {
  24     private Context mContext;
  25     private ColorSuggestion[] mSuggestions;
  26     private OnColorSuggestionClickListener mListener;
  27
  28     /**
  29      * The callback used to indicate the user has clicked on a suggestion.
  30      */
  31     public interface OnColorSuggestionClickListener {
  32
  33         /**
  34          * Called upon a click on a suggestion.
  35          *
  36          * @param suggestion The suggestion that was clicked.
  37          */
  38         void onColorSuggestionClick(ColorSuggestion suggestion);
  39     }
  40
  41     private static final int COLORS_PER_ROW = 4;
  42
  43     ColorSuggestionListAdapter(Context context, ColorSuggestion[] suggestions) {
  44         mContext = context;
  45         mSuggestions = suggestions;
  46     }
  47
  48     /**
  49      * Sets the listener that will be notified upon a click on a suggestion.
  50      */
  51     public void setOnColorSuggestionClickListener(OnColorSuggestionClickListener listener) {
  52         mListener = listener;
  53     }
  54
  55     /**
  56      * Sets up the color button to represent a color suggestion.
  57      *
  58      * @param button The button view to set up.
  59      * @param index The index of the suggestion in mSuggestions.
  60      */
  61     private void setUpColorButton(View button, int index) {
  62         if (index >= mSuggestions.length) {
  63             button.setTag(null);
  64             button.setContentDescription(null);
  65             button.setVisibility(View.INVISIBLE);
  66             return;
  67         }
  68         button.setTag(mSuggestions[index]);
  69         button.setVisibility(View.VISIBLE);
  70         ColorSuggestion suggestion = mSuggestions[index];
  71         LayerDrawable layers = (LayerDrawable) button.getBackground();
  72         GradientDrawable swatch =
  73                 (GradientDrawable) layers.findDrawableByLayerId(R.id.color_button_swatch);
  74         swatch.setColor(suggestion.mColor);
  75         String description = suggestion.mLabel;
  76         if (TextUtils.isEmpty(description)) {
  77             description = String.format("#%06X", (0xFFFFFF & suggestion.mColor));
  78         }
  79         button.setContentDescription(description);
  80         button.setOnClickListener(this);
  81     }
  82
  83     @Override
  84     public void onClick(View v) {
  85         if (mListener == null) {
  86             return;
  87         }
  88         ColorSuggestion suggestion = (ColorSuggestion) v.getTag();
  89         if (suggestion == null) {
  90             return;
  91         }
  92         mListener.onColorSuggestionClick(suggestion);
  93     }
  94
  95     @Override
  96     public View getView(int position, View convertView, ViewGroup parent) {
  97         LinearLayout layout;
  98         if (convertView != null && convertView instanceof LinearLayout) {
  99             layout = (LinearLayout) convertView;
 100         } else {
 101             layout = new LinearLayout(mContext);
 102             layout.setLayoutParams(new AbsListView.LayoutParams(
 103                     AbsListView.LayoutParams.MATCH_PARENT,
 104                     AbsListView.LayoutParams.WRAP_CONTENT));
 105             layout.setOrientation(LinearLayout.HORIZONTAL);
 106             layout.setBackgroundColor(Color.WHITE);
 107             int buttonHeight =
 108                     mContext.getResources().getDimensionPixelOffset(R.dimen.color_button_height);
 109             for (int i = 0; i < COLORS_PER_ROW; ++i) {
 110                 View button = new View(mContext);
 111                 LinearLayout.LayoutParams layoutParams =
 112                         new LinearLayout.LayoutParams(0, buttonHeight, 1f);
 113                 ApiCompatibilityUtils.setMarginStart(layoutParams, -1);
 114                 if (i == COLORS_PER_ROW - 1) {
 115                     ApiCompatibilityUtils.setMarginEnd(layoutParams, -1);
 116                 }
 117                 button.setLayoutParams(layoutParams);
 118                 button.setBackgroundResource(R.drawable.color_button_background);
 119                 layout.addView(button);
 120             }
 121         }
 122         for (int i = 0; i < COLORS_PER_ROW; ++i) {
 123             setUpColorButton(layout.getChildAt(i), position * COLORS_PER_ROW + i);
 124         }
 125         return layout;
 126     }
 127
 128     @Override
 129     public long getItemId(int position) {
 130         return position;
 131     }
 132
 133     @Override
 134     public Object getItem(int position) {
 135         return null;
 136     }
 137
 138     @Override
 139     public int getCount() {
 140         return (mSuggestions.length + COLORS_PER_ROW - 1) / COLORS_PER_ROW;
 141     }
 142 }