Android Open Source - Aviary-Android-SDK Gallery Top Indicator Drawable

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AVIARY API TERMS OF USE Full Legal Agreement The following terms and conditions and the terms and conditions at http://www.aviary.com/terms (collectively, the ?Terms??) govern your use of any and ...

Java Source Code

package com.aviary.android.feather.graphics;
//from   w ww .  j  a  v  a  2  s  .  com
import android.content.Context;
import android.content.res.Resources.Theme;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.ColorFilter;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.Paint.Style;
import android.graphics.Path;
import android.graphics.PixelFormat;
import android.graphics.Rect;
import android.graphics.drawable.Drawable;
import android.util.Log;

import com.aviary.android.feather.R;

/**
 * Drawable used to draw the gallery top indicator
 * 
 * @author alessandro
 */
public class GalleryTopIndicatorDrawable extends Drawable {

  static final String LOG_TAG = "gallery-top-indicator";

  static final int DIRECTION_TOP_DOWN = 1;
  static final int DIRECTION_BOTTOM_TOP = 2;

  int mShadowColor, mFillColor, mStrokeColor1, mStrokeColor2;
  float mIndicatorSize;
  int mStrokeWidth;
  int mShadowDy;
  int mDirection;
  int mOffsetY;
  int mMinHeight;
  Matrix mMatrix = new Matrix();

  final Rect destRect = new Rect();
  final Paint paint;

  public GalleryTopIndicatorDrawable ( Context context ) {
    this( context, R.attr.aviaryOptionPanelTopIndicatorStyle, 0 );
  }

  public GalleryTopIndicatorDrawable ( Context context, int defStyle ) {
    this( context, defStyle, 0 );
  }

  public GalleryTopIndicatorDrawable ( Context context, int defStyle, int defStyleRes ) {
    Theme theme = context.getTheme();
    TypedArray array = theme.obtainStyledAttributes( null, R.styleable.AviaryGalleryTopIndicator, defStyle, defStyleRes );

    Log.d( LOG_TAG, "defaultStyle: " + defStyle );

    mShadowColor = array.getColor( R.styleable.AviaryGalleryTopIndicator_android_shadowColor, 0 );
    mShadowDy = (int) array.getFloat( R.styleable.AviaryGalleryTopIndicator_android_shadowDy, 0f );
    mFillColor = array.getColor( R.styleable.AviaryGalleryTopIndicator_aviary_color1, Color.WHITE );
    mStrokeColor1 = array.getColor( R.styleable.AviaryGalleryTopIndicator_aviary_strokeColor, Color.WHITE );
    mStrokeColor2 = array.getColor( R.styleable.AviaryGalleryTopIndicator_aviary_strokeColor2, Color.WHITE );
    mIndicatorSize = array.getFloat( R.styleable.AviaryGalleryTopIndicator_aviary_indicatorSize, 1f );
    mStrokeWidth = array.getDimensionPixelSize( R.styleable.AviaryGalleryTopIndicator_aviary_strokeWidth, 2 );
    mDirection = array.getInteger( R.styleable.AviaryGalleryTopIndicator_aviary_direction, 1 );
    mOffsetY = array.getDimensionPixelSize( R.styleable.AviaryGalleryTopIndicator_aviary_offsety, 0 );
    mMinHeight = array.getDimensionPixelSize( R.styleable.AviaryGalleryTopIndicator_android_minHeight, 0 );

    Log.i( LOG_TAG, "strokeWidth: " + mStrokeWidth );
    Log.i( LOG_TAG, "direction: " + mDirection );
    Log.i( LOG_TAG, "offset: " + mOffsetY );

    array.recycle();

    paint = new Paint( Paint.ANTI_ALIAS_FLAG );
  }

  @Override
  public int getMinimumHeight() {
    return mMinHeight;
  }

  @Override
  public int getIntrinsicHeight() {
    return mMinHeight;
  }

  @Override
  public void draw( Canvas canvas ) {
    copyBounds( destRect );

    int halfHeight = destRect.height() / 2;
    int halfWidth = destRect.width() / 2;
    int triangleSize = (int) ( halfHeight * mIndicatorSize );

    int top = destRect.top + mStrokeWidth / 2;
    int left = destRect.left - mStrokeWidth;
    int right = destRect.right + mStrokeWidth;

    Path path = new Path();
    path.moveTo( left, top );
    path.lineTo( right, top );
    path.lineTo( right, top + halfHeight );

    path.lineTo( left + halfWidth + triangleSize, top + halfHeight );
    path.lineTo( left + halfWidth, top + halfHeight + triangleSize );
    path.lineTo( left + halfWidth - triangleSize, top + halfHeight );

    path.lineTo( left, top + halfHeight );
    path.lineTo( left, top );

    if ( mDirection == DIRECTION_BOTTOM_TOP ) {
      mMatrix.reset();
      mMatrix.setScale( 1, -1, 0, destRect.height() / 2 );
      mMatrix.postTranslate( 0, mOffsetY );
      canvas.save( Canvas.MATRIX_SAVE_FLAG );
      canvas.concat( mMatrix );
    }

    paint.setStyle( Style.FILL );

    if ( mShadowDy > 0 ) {
      path.offset( 0, mShadowDy );
      paint.setColor( mShadowColor );
      canvas.drawPath( path, paint );
      path.offset( 0, -mShadowDy );
    }

    paint.setColor( mFillColor );
    canvas.drawPath( path, paint );

    paint.setStyle( Style.STROKE );
    paint.setColor( mStrokeColor1 );
    paint.setStrokeWidth( mStrokeWidth );
    canvas.drawPath( path, paint );

    paint.setStyle( Style.STROKE );
    paint.setColor( mStrokeColor2 );

    if ( mDirection == DIRECTION_TOP_DOWN ) {
      canvas.drawLine( left + mStrokeWidth, top + mStrokeWidth, right - mStrokeWidth, top + mStrokeWidth, paint );
    } else {
      top = top + halfHeight - mStrokeWidth;
      canvas.drawLine( left, top, left + halfWidth - triangleSize, top, paint );
      canvas.drawLine( left + halfWidth + triangleSize, top, right, top, paint );
      canvas.restore();
    }
  }

  @Override
  public int getOpacity() {
    return PixelFormat.TRANSLUCENT;
  }

  @Override
  public void setAlpha( int alpha ) {}

  @Override
  public void setColorFilter( ColorFilter cf ) {}

}

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