1/*
2 * Copyright (C) 2013 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.inputmethod.keyboard.emoji;
18
19import android.content.Context;
20import android.graphics.Canvas;
21import android.graphics.Paint;
22import android.util.AttributeSet;
23import android.view.View;
24
25public final class EmojiCategoryPageIndicatorView extends View {
26    private static final float BOTTOM_MARGIN_RATIO = 1.0f;
27    private final Paint mPaint = new Paint();
28    private int mCategoryPageSize = 0;
29    private int mCurrentCategoryPageId = 0;
30    private float mOffset = 0.0f;
31
32    public EmojiCategoryPageIndicatorView(final Context context, final AttributeSet attrs) {
33        this(context, attrs, 0);
34    }
35
36    public EmojiCategoryPageIndicatorView(final Context context, final AttributeSet attrs,
37            final int defStyle) {
38        super(context, attrs, defStyle);
39    }
40
41    public void setColors(final int foregroundColor, final int backgroundColor) {
42        mPaint.setColor(foregroundColor);
43        setBackgroundColor(backgroundColor);
44    }
45
46    public void setCategoryPageId(final int size, final int id, final float offset) {
47        mCategoryPageSize = size;
48        mCurrentCategoryPageId = id;
49        mOffset = offset;
50        invalidate();
51    }
52
53    @Override
54    protected void onDraw(final Canvas canvas) {
55        if (mCategoryPageSize <= 1) {
56            // If the category is not set yet or contains only one category,
57            // just clear and return.
58            canvas.drawColor(0);
59            return;
60        }
61        final float height = getHeight();
62        final float width = getWidth();
63        final float unitWidth = width / mCategoryPageSize;
64        final float left = unitWidth * mCurrentCategoryPageId + mOffset * unitWidth;
65        final float top = 0.0f;
66        final float right = left + unitWidth;
67        final float bottom = height * BOTTOM_MARGIN_RATIO;
68        canvas.drawRect(left, top, right, bottom, mPaint);
69    }
70}
71