HorizontalBarChart.java

package net.tasksnow.view.reuse;

import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.RectF;
import android.util.AttributeSet;
import android.view.View;

import net.tasksnow.R;
import net.tasksnow.R.styleable;


/**
 * @author D056943
 * @since 19:15:47 - 28.03.2013
 * @project TasksNow
 */
public class HorizontalBarChart extends View {

    // ===========================================================
    // Constants
    // ===========================================================

    // ===========================================================
    // Fields
    // ===========================================================

    private int progressCount = 0;
    private int totalCount = 100;

    private int progressBackgroundColor = 0xffD7D7D7;
    private final Paint backgroundPaint = new Paint();

    private int progressColor = 0xFFFF8800;
    private final Paint progressColorPaint = new Paint();

    // ===========================================================
    // Constructors
    // ===========================================================

    public HorizontalBarChart(Context context) {
        super(context);
        init();
    }

    public HorizontalBarChart(Context context, AttributeSet attrs) {
        super(context, attrs);
        TypedArray a = context.getTheme().obtainStyledAttributes(attrs, R.styleable.HorizontalBarChart, 0, 0);

        try {
            this.progressCount = a.getInteger(R.styleable.HorizontalBarChart_progressCount, 0);
            this.totalCount = a.getInteger(R.styleable.HorizontalBarChart_totalCount, 100);
            this.progressColor = a.getColor(R.styleable.HorizontalBarChart_progressColor, 0xFFFF8800);
            this.progressBackgroundColor = a.getColor(R.styleable.HorizontalBarChart_progressBackgrounColor, 0xffD7D7D7);

        }
        finally {
            // release the TypedArray so that it can be reused.
            a.recycle();
        }
        init();
    }

    public void init() {

        backgroundPaint.setColor(progressBackgroundColor);
        backgroundPaint.setStyle(Paint.Style.FILL);

        progressColorPaint.setColor(progressColor);
        progressColorPaint.setStyle(Paint.Style.FILL);
    }

    // ===========================================================
    // Methods for/from SuperClass/Interfaces
    // ===========================================================
    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);

        canvas.drawRect(canvas.getClipBounds(), backgroundPaint);

        RectF background = new RectF(canvas.getClipBounds());

        background.right = ((float) progressCount / (float) totalCount) * canvas.getWidth();
        canvas.drawRect(background, progressColorPaint);

    }

    // ===========================================================
    // Methods
    // ===========================================================

    // ===========================================================
    // Getter & Setter
    // ===========================================================

    public int getProgressCount() {
        return progressCount;
    }

    public void setProgressCount(int progressCount) {
        this.progressCount = progressCount;
    }

    public int getTotalCount() {
        return totalCount;
    }

    public void setTotalCount(int totalCount) {
        this.totalCount = totalCount;
    }

    // ===========================================================
    // Inner and Anonymous Classes
    // ===========================================================
}