Android Open Source - GuiLib Standard Showcase Drawer

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License

The source code is released under:

Apache License

Java Source Code

/*
 * Copyright 2014 Alex Curran/*from   w ww.j av  a  2s .  co  m*/
 *
 * 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.github.amlcurran.showcaseview;

import android.content.res.Resources;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.PorterDuff;
import android.graphics.PorterDuffXfermode;
import android.graphics.drawable.Drawable;

import com.gandulf.guilib.R;

/**
 * Created by curraa01 on 13/10/2013.
 */
class StandardShowcaseDrawer implements ShowcaseDrawer {

  protected final Paint eraserPaint;
  protected final Drawable showcaseDrawable;
  private final Paint basicPaint;
  private final float showcaseRadius;
  protected int backgroundColour;

  public StandardShowcaseDrawer(Resources resources) {
    PorterDuffXfermode xfermode = new PorterDuffXfermode(PorterDuff.Mode.MULTIPLY);
    eraserPaint = new Paint();
    eraserPaint.setColor(0xFFFFFF);
    eraserPaint.setAlpha(0);
    eraserPaint.setXfermode(xfermode);
    eraserPaint.setAntiAlias(true);
    basicPaint = new Paint();
    showcaseRadius = resources.getDimension(R.dimen.showcase_radius);
    showcaseDrawable = resources.getDrawable(R.drawable.cling_bleached);
  }

  @Override
  public void setShowcaseColour(int color) {
    showcaseDrawable.setColorFilter(color, PorterDuff.Mode.MULTIPLY);
  }

  @Override
  public void drawShowcase(Bitmap buffer, float x, float y, float scaleMultiplier) {
    Canvas bufferCanvas = new Canvas(buffer);
    bufferCanvas.drawCircle(x, y, showcaseRadius, eraserPaint);
    int halfW = getShowcaseWidth() / 2;
    int halfH = getShowcaseHeight() / 2;
    int left = (int) (x - halfW);
    int top = (int) (y - halfH);
    showcaseDrawable.setBounds(left, top, left + getShowcaseWidth(), top + getShowcaseHeight());
    showcaseDrawable.draw(bufferCanvas);
  }

  @Override
  public int getShowcaseWidth() {
    return showcaseDrawable.getIntrinsicWidth();
  }

  @Override
  public int getShowcaseHeight() {
    return showcaseDrawable.getIntrinsicHeight();
  }

  @Override
  public float getBlockedRadius() {
    return showcaseRadius;
  }

  @Override
  public void setBackgroundColour(int backgroundColor) {
    this.backgroundColour = backgroundColor;
  }

  @Override
  public void erase(Bitmap bitmapBuffer) {
    bitmapBuffer.eraseColor(backgroundColour);
  }

  @Override
  public void drawToCanvas(Canvas canvas, Bitmap bitmapBuffer) {
    canvas.drawBitmap(bitmapBuffer, 0, 0, basicPaint);
  }

}

Java Source Code List

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