| /* |
| * Copyright (C) 2008 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.example.android.apis.graphics; |
| |
| import android.content.Context; |
| import android.graphics.*; |
| import android.os.Bundle; |
| import android.view.KeyEvent; |
| import android.view.View; |
| import android.view.Window; |
| |
| public class UnicodeChart extends GraphicsActivity { |
| |
| @Override |
| protected void onCreate(Bundle savedInstanceState) { |
| super.onCreate(savedInstanceState); |
| |
| requestWindowFeature(Window.FEATURE_NO_TITLE); |
| |
| setContentView(new SampleView(this)); |
| } |
| |
| private static class SampleView extends View { |
| private Paint mBigCharPaint; |
| private Paint mLabelPaint; |
| private final char[] mChars = new char[256]; |
| private final float[] mPos = new float[512]; |
| |
| private int mBase; |
| |
| private static final int XMUL = 20; |
| private static final int YMUL = 28; |
| private static final int YBASE = 18; |
| |
| public SampleView(Context context) { |
| super(context); |
| setFocusable(true); |
| setFocusableInTouchMode(true); |
| |
| mBigCharPaint = new Paint(Paint.ANTI_ALIAS_FLAG); |
| mBigCharPaint.setTextSize(15); |
| mBigCharPaint.setTextAlign(Paint.Align.CENTER); |
| |
| mLabelPaint = new Paint(Paint.ANTI_ALIAS_FLAG); |
| mLabelPaint.setTextSize(8); |
| mLabelPaint.setTextAlign(Paint.Align.CENTER); |
| |
| // the position array is the same for all charts |
| float[] pos = mPos; |
| int index = 0; |
| for (int col = 0; col < 16; col++) { |
| final float x = col * XMUL + 10; |
| for (int row = 0; row < 16; row++) { |
| pos[index++] = x; |
| pos[index++] = row * YMUL + YBASE; |
| } |
| } |
| } |
| |
| private float computeX(int index) { |
| return (index >> 4) * XMUL + 10; |
| } |
| |
| private float computeY(int index) { |
| return (index & 0xF) * YMUL + YMUL; |
| } |
| |
| private void drawChart(Canvas canvas, int base) { |
| char[] chars = mChars; |
| for (int i = 0; i < 256; i++) { |
| int unichar = base + i; |
| chars[i] = (char)unichar; |
| |
| canvas.drawText(Integer.toHexString(unichar), |
| computeX(i), computeY(i), mLabelPaint); |
| } |
| canvas.drawPosText(chars, 0, 256, mPos, mBigCharPaint); |
| } |
| |
| @Override protected void onDraw(Canvas canvas) { |
| canvas.drawColor(Color.WHITE); |
| |
| canvas.translate(0, 1); |
| drawChart(canvas, mBase * 256); |
| } |
| |
| @Override public boolean onKeyDown(int keyCode, KeyEvent event) { |
| switch (keyCode) { |
| case KeyEvent.KEYCODE_DPAD_LEFT: |
| if (mBase > 0) { |
| mBase -= 1; |
| invalidate(); |
| } |
| return true; |
| case KeyEvent.KEYCODE_DPAD_RIGHT: |
| mBase += 1; |
| invalidate(); |
| return true; |
| default: |
| break; |
| } |
| return super.onKeyDown(keyCode, event); |
| } |
| } |
| } |