Peter Schiller
99 lines
3.2 KiB
Java
99 lines
3.2 KiB
Java
/*
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* Copyright (C) 2016 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.launcher3.pageindicators;
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import android.content.Context;
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import android.content.res.Resources;
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import android.graphics.Canvas;
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import android.graphics.ColorFilter;
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import android.graphics.Paint;
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import android.graphics.Path;
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import android.graphics.PixelFormat;
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import com.android.launcher3.R;
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import android.graphics.drawable.Drawable;
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public class CaretDrawable extends Drawable {
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public static final int LEVEL_CARET_POINTING_UP = 0; // minimum possible level value
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public static final int LEVEL_CARET_POINTING_DOWN = 10000; // maximum possible level value
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public static final int LEVEL_CARET_NEUTRAL = LEVEL_CARET_POINTING_DOWN / 2;
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private float mCaretProgress;
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private Paint mPaint = new Paint();
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private Path mPath = new Path();
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private int mInset;
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public CaretDrawable(Context context) {
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final Resources res = context.getResources();
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mPaint.setColor(res.getColor(R.color.all_apps_caret_color));
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mPaint.setAntiAlias(true);
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mPaint.setStrokeWidth(res.getDimensionPixelSize(R.dimen.all_apps_caret_stroke_width));
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mPaint.setStyle(Paint.Style.STROKE);
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mPaint.setStrokeCap(Paint.Cap.SQUARE);
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mPaint.setStrokeJoin(Paint.Join.MITER);
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mInset = res.getDimensionPixelSize(R.dimen.all_apps_caret_inset);
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}
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@Override
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public void draw(Canvas canvas) {
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final float width = getBounds().width();
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final float height = getBounds().height();
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final float left = getBounds().left;
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final float top = getBounds().top;
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final float verticalInset = (height / 4);
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final float caretHeight = (height - (verticalInset * 2));
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mPath.reset();
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mPath.moveTo(left, top + caretHeight * (1 - mCaretProgress));
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mPath.lineTo(left + (width / 2), top + caretHeight * mCaretProgress);
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mPath.lineTo(left + width, top + caretHeight * (1 - mCaretProgress));
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canvas.drawPath(mPath, mPaint);
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}
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@Override
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protected boolean onLevelChange(int level) {
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mCaretProgress = (float) level / (float) LEVEL_CARET_POINTING_DOWN;
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invalidateSelf();
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return true;
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}
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@Override
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public int getOpacity() {
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return PixelFormat.OPAQUE;
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}
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@Override
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public void setAlpha(int alpha) {
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// no-op
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}
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@Override
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public void setColorFilter(ColorFilter cf) {
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// no-op
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}
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@Override
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public void setBounds(int left, int top, int right, int bottom) {
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super.setBounds(left + mInset, top + mInset, right - mInset, bottom - mInset);
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}
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}
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