/
ColorPaletteDemoFragment.java
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/
ColorPaletteDemoFragment.java
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/*
* Copyright 2021 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 io.material.catalog.color;
import io.material.catalog.R;
import android.content.ClipData;
import android.content.ClipboardManager;
import android.content.Context;
import android.os.Bundle;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import androidx.recyclerview.widget.RecyclerView.ViewHolder;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import android.widget.Toast;
import androidx.annotation.ArrayRes;
import androidx.annotation.ColorInt;
import androidx.annotation.LayoutRes;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.core.content.ContextCompat;
import io.material.catalog.feature.DemoFragment;
/** A fragment that displays the Color Palette demo for the Catalog app. */
public abstract class ColorPaletteDemoFragment extends DemoFragment {
private ColorsAdapter adapter;
@Nullable
@Override
public View onCreateDemoView(
@NonNull LayoutInflater layoutInflater,
@Nullable ViewGroup viewGroup,
@Nullable Bundle bundle) {
View view = layoutInflater.inflate(getColorsLayoutResId(), viewGroup, false /* attachToRoot */);
RecyclerView recyclerView = (RecyclerView) view;
recyclerView.setLayoutManager(new LinearLayoutManager(getContext()));
adapter = new ColorsAdapter(getContext(), getColorsArrayResId());
recyclerView.setAdapter(adapter);
recyclerView.addItemDecoration(new ColorSectionsItemDecoration(getContext(), adapter));
return view;
}
@Override
public void onCreateOptionsMenu(@NonNull Menu menu, @NonNull MenuInflater menuInflater) {
menuInflater.inflate(R.menu.cat_colors_menu, menu);
super.onCreateOptionsMenu(menu, menuInflater);
}
@Override
public boolean onOptionsItemSelected(@NonNull MenuItem menuItem) {
if (menuItem.getItemId() == R.id.copy_colors) {
Context context = requireContext();
ClipboardManager clipboard =
(ClipboardManager) context.getSystemService(Context.CLIPBOARD_SERVICE);
ClipData clip = ClipData.newPlainText("Colors", generateColorsText(adapter));
clipboard.setPrimaryClip(clip);
Toast.makeText(context, "Copied colors to clipboard.", Toast.LENGTH_LONG).show();
return true;
}
return super.onOptionsItemSelected(menuItem);
}
@LayoutRes
protected abstract int getColorsLayoutResId();
/**
* Returns an array of array resources containing a list of colors resource. Each group of colors
* will be displayed in a list.
*/
@ArrayRes
protected abstract int getColorsArrayResId();
/** View holder class for the header of the color palette. */
static class ColorHeaderViewHolder extends ViewHolder {
private final TextView header;
ColorHeaderViewHolder(ViewGroup parent) {
super(
LayoutInflater.from(parent.getContext())
.inflate(R.layout.cat_colors_palette_header, parent, false));
header = (TextView) itemView;
}
void bind(ColorHeaderItem headerItem) {
header.setText(headerItem.getDisplayName());
header.setBackgroundResource(headerItem.getBackgroundColorRes());
}
}
/** View holder class for the items of the color palette. */
static class ColorViewHolder extends ViewHolder {
private final Context context;
private final TextView nameView;
private final TextView descriptionView;
ColorViewHolder(ViewGroup parent) {
super(
LayoutInflater.from(parent.getContext())
.inflate(R.layout.cat_colors_palette_item, parent, false));
nameView = itemView.findViewById(R.id.name);
descriptionView = itemView.findViewById(R.id.description);
context = itemView.getContext();
}
void bind(ColorItem colorItem) {
int value = ContextCompat.getColor(context, colorItem.getColorRes());
String colorResName = colorItem.getColorResName();
String resQualifier =
colorResName.startsWith(ColorHeaderItem.SYSTEM_PREFIX) ? "@android:color/" : "@color/";
nameView.setText(
context.getResources().getString(R.string.cat_color_res, resQualifier, colorResName));
descriptionView.setText(String.format("#%06x", value & 0xFFFFFF));
int textColor = getTextColor(colorItem);
nameView.setTextColor(textColor);
descriptionView.setTextColor(textColor);
itemView.setBackgroundResource(colorItem.getColorRes());
}
@ColorInt
private int getTextColor(ColorItem colorItem) {
return ColorDemoUtils.getTextColor(colorItem.getColorValue());
}
}
private String generateColorsText(@NonNull ColorsAdapter adapter) {
StringBuilder colorsText = new StringBuilder();
for (ColorAdapterItem item : adapter.getItems()) {
if (item instanceof ColorHeaderItem) {
if (colorsText.length() > 0) {
colorsText.append("\n");
}
colorsText.append(((ColorHeaderItem) item).getDisplayName()).append("\n");
} else if (item instanceof ColorItem) {
ColorItem colorItem = (ColorItem) item;
int value = ContextCompat.getColor(getContext(), colorItem.getColorRes());
String colorResName = colorItem.getColorResName();
String resQualifier =
colorResName.startsWith(ColorHeaderItem.SYSTEM_PREFIX) ? "@android:color/" : "@color/";
colorsText.append(String.format("#%06x", value & 0xFFFFFF)).append("\n");
colorsText.append(resQualifier).append(colorResName).append("\n");
}
}
return colorsText.toString();
}
}