SwatchView.java :  » Wallpaper » android-spiral-wallpaper » com » kostmo » tools » view » Android Open Source

package com.kostmo.tools.view;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.RectF;
import android.graphics.Paint.Join;
import android.graphics.Paint.Style;
import android.util.AttributeSet;
import android.util.Log;
import android.view.View;

public class SwatchView extends View {

  public static final String TAG = "SwatchView";

  static final int defaultWidth = 32;
  static final int defaultHeight = 32;

  int color;
  Paint paint = new Paint();
  
  boolean grow_to_fit = false;
  
  // ========================================================================
  public SwatchView(Context context) {
    super(context);
    init();
  }

  public SwatchView(Context context, AttributeSet attrs) {
    super(context, attrs);
    init();
  }

  public SwatchView(Context context, AttributeSet attrs, int defStyle) {
    super(context, attrs, defStyle);
    init();
  }


  /**
   * @see android.view.View#measure(int, int)
   */
  @Override
  protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
    
     int max_width = MeasureSpec.getSize(widthMeasureSpec);
         int max_height = MeasureSpec.getSize(heightMeasureSpec);
     Log.d(TAG, "Swatch measured size: (" + max_width + "x" + max_height + ")");

     int size = grow_to_fit ? Math.max(max_width, max_height) : Math.min(max_width, max_height);

         setMeasuredDimension(size, size);
  }

  // ========================================================================
  void init() {
    this.paint.setAntiAlias(true);
    this.paint.setStrokeJoin(Join.ROUND);
  }

  // ========================================================================
  public void setGrow(boolean grow) {
    this.grow_to_fit = grow;
  }
  
  // ========================================================================
  public void setColor(int color) {
    this.color = color;
  }

  // ========================================================================
  @Override
  protected void onDraw(Canvas canvas) {

    int size = Math.min(getWidth(), getHeight());
    float stroke_width = size/8f;
    this.paint.setStrokeWidth(stroke_width);
    
    RectF rect = new RectF();
    float inset_distatnce = -(size - stroke_width)/2;
    rect.inset(inset_distatnce, inset_distatnce);
    
    this.paint.setColor(this.color);
    this.paint.setStyle(Style.FILL);
    drawCenteredRect(canvas, rect, this.paint);
    
    this.paint.setColor(Color.BLACK);
    this.paint.setStyle(Style.STROKE);
    
    canvas.save();
    canvas.clipRect(0, 0, getWidth()/2, getHeight());
    drawCenteredRect(canvas, rect, this.paint);
    canvas.restore();

    canvas.clipRect(getWidth()/2, 0, getWidth(), getHeight());
    this.paint.setColor(Color.WHITE);
    drawCenteredRect(canvas, rect, this.paint);
  }

  // ========================================================================
  void drawCenteredRect(Canvas canvas, RectF rect, Paint paint) {

    canvas.save();
    canvas.translate(getWidth()/2, getHeight()/2);
    float r = paint.getStrokeWidth()*2;
    canvas.drawRoundRect(rect, r, r, this.paint);
    canvas.restore();
  }
}