| /* |
| * Copyright (C) 2013 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.android.settings.accessibility; |
| |
| import android.content.Context; |
| import android.graphics.Color; |
| import android.graphics.drawable.ColorDrawable; |
| import android.graphics.drawable.Drawable; |
| import android.support.v7.preference.PreferenceViewHolder; |
| import android.text.TextUtils; |
| import android.util.AttributeSet; |
| import android.view.View; |
| import android.widget.ImageView; |
| import android.widget.TextView; |
| |
| import com.android.settings.R; |
| |
| /** |
| * Grid preference that allows the user to pick a color from a predefined set of |
| * colors. Optionally shows a preview in the preference item. |
| */ |
| public class ColorPreference extends ListDialogPreference { |
| private ColorDrawable mPreviewColor; |
| private boolean mPreviewEnabled; |
| |
| public ColorPreference(Context context, AttributeSet attrs) { |
| super(context, attrs); |
| |
| setDialogLayoutResource(R.layout.grid_picker_dialog); |
| setListItemLayoutResource(R.layout.color_picker_item); |
| } |
| |
| /** |
| * @param enabled whether to show a preview in the preference item |
| */ |
| public void setPreviewEnabled(boolean enabled) { |
| if (mPreviewEnabled != enabled) { |
| mPreviewEnabled = enabled; |
| |
| if (enabled) { |
| setWidgetLayoutResource(R.layout.preference_color); |
| } else { |
| setWidgetLayoutResource(0); |
| } |
| } |
| } |
| |
| @Override |
| public boolean shouldDisableDependents() { |
| return Color.alpha(getValue()) == 0 || super.shouldDisableDependents(); |
| } |
| |
| @Override |
| protected CharSequence getTitleAt(int index) { |
| final CharSequence title = super.getTitleAt(index); |
| if (title != null) { |
| return title; |
| } |
| |
| // If no title was supplied, format title using RGB values. |
| final int value = getValueAt(index); |
| final int r = Color.red(value); |
| final int g = Color.green(value); |
| final int b = Color.blue(value); |
| return getContext().getString(R.string.color_custom, r, g, b); |
| } |
| |
| @Override |
| public void onBindViewHolder(PreferenceViewHolder view) { |
| super.onBindViewHolder(view); |
| |
| if (mPreviewEnabled) { |
| final ImageView previewImage = (ImageView) view.findViewById(R.id.color_preview); |
| final int argb = getValue(); |
| if (Color.alpha(argb) < 255) { |
| previewImage.setBackgroundResource(R.drawable.transparency_tileable); |
| } else { |
| previewImage.setBackground(null); |
| } |
| |
| if (mPreviewColor == null) { |
| mPreviewColor = new ColorDrawable(argb); |
| previewImage.setImageDrawable(mPreviewColor); |
| } else { |
| mPreviewColor.setColor(argb); |
| } |
| |
| final CharSequence summary = getSummary(); |
| if (!TextUtils.isEmpty(summary)) { |
| previewImage.setContentDescription(summary); |
| } else { |
| previewImage.setContentDescription(null); |
| } |
| |
| previewImage.setAlpha(isEnabled() ? 1f : 0.2f); |
| } |
| } |
| |
| @Override |
| protected void onBindListItem(View view, int index) { |
| final int argb = getValueAt(index); |
| final int alpha = Color.alpha(argb); |
| |
| final ImageView swatch = (ImageView) view.findViewById(R.id.color_swatch); |
| if (alpha < 255) { |
| swatch.setBackgroundResource(R.drawable.transparency_tileable); |
| } else { |
| swatch.setBackground(null); |
| } |
| |
| final Drawable foreground = swatch.getDrawable(); |
| if (foreground instanceof ColorDrawable) { |
| ((ColorDrawable) foreground).setColor(argb); |
| } else { |
| swatch.setImageDrawable(new ColorDrawable(argb)); |
| } |
| |
| final CharSequence title = getTitleAt(index); |
| if (title != null) { |
| final TextView summary = (TextView) view.findViewById(R.id.summary); |
| summary.setText(title); |
| } |
| } |
| } |