diff --git a/src/com/jjoe64/graphview/BarGraphView.java b/src/com/jjoe64/graphview/BarGraphView.java
index 2a3a87c7f..1bb675afa 100644
--- a/src/com/jjoe64/graphview/BarGraphView.java
+++ b/src/com/jjoe64/graphview/BarGraphView.java
@@ -41,8 +41,9 @@ public BarGraphView(Context context, String title) {
 	@Override
 	public void drawSeries(Canvas canvas, GraphViewDataInterface[] values, float graphwidth, float graphheight,
 			float border, double minX, double minY, double diffX, double diffY,
-			float horstart, GraphViewSeriesStyle style) {
-		float colwidth = (graphwidth - (2 * border)) / values.length;
+			float horstart, GraphViewSeriesStyle style, int serieNum) {
+		//float colwidth = (graphwidth - (2 * border)) / values.length / seriesCount;
+		float colwidth = (graphwidth) / values.length / getSeriesCount();
 
 		paint.setStrokeWidth(style.thickness);
 		paint.setColor(style.color);
@@ -58,7 +59,7 @@ public void drawSeries(Canvas canvas, GraphViewDataInterface[] values, float gra
 				paint.setColor(style.getValueDependentColor().get(values[i]));
 			}
 
-			canvas.drawRect((i * colwidth) + horstart, (border - y) + graphheight, ((i * colwidth) + horstart) + (colwidth - 1), graphheight + border - 1, paint);
+			canvas.drawRect((i * getSeriesCount() * colwidth) + horstart + (colwidth * serieNum), (border - y) + graphheight, ((i * getSeriesCount() * colwidth) + horstart) + (colwidth - 1) + (colwidth * serieNum), graphheight + border - 1, paint);
 		}
 	}
 }
diff --git a/src/com/jjoe64/graphview/GraphView.java b/src/com/jjoe64/graphview/GraphView.java
index b0d32d866..5f540b168 100755
--- a/src/com/jjoe64/graphview/GraphView.java
+++ b/src/com/jjoe64/graphview/GraphView.java
@@ -1,5 +1,5 @@
 /**
- * This file is part of GraphView.
+f * This file is part of GraphView.
  *
  * GraphView is free software: you can redistribute it and/or modify
  * it under the terms of the GNU Lesser General Public License as published by
@@ -19,17 +19,22 @@
 
 package com.jjoe64.graphview;
 
+import java.io.File;
+import java.io.FileOutputStream;
 import java.text.NumberFormat;
 import java.util.ArrayList;
 import java.util.List;
+import java.util.Random;
 
 import android.content.Context;
+import android.graphics.Bitmap;
 import android.graphics.Canvas;
 import android.graphics.Color;
 import android.graphics.Paint;
 import android.graphics.Paint.Align;
 import android.graphics.Rect;
 import android.graphics.RectF;
+import android.os.Environment;
 import android.util.AttributeSet;
 import android.util.Log;
 import android.view.MotionEvent;
@@ -65,7 +70,7 @@ private class GraphViewContentView extends View {
 		 */
 		public GraphViewContentView(Context context) {
 			super(context);
-			setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));
+			setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));
 		}
 
 		/**
@@ -153,7 +158,7 @@ protected void onDraw(Canvas canvas) {
 			paint.setStrokeCap(Paint.Cap.ROUND);
 
 			for (int i=0; i<graphSeries.size(); i++) {
-				drawSeries(canvas, _values(i), graphwidth, graphheight, border, minX, minY, diffX, diffY, horstart, graphSeries.get(i).style);
+				drawSeries(canvas, _values(i), graphwidth, graphheight, border, minX, minY, diffX, diffY, horstart, graphSeries.get(i).style, i);
 			}
 
 			if (showLegend) drawLegend(canvas, height, width);
@@ -163,6 +168,7 @@ private void onMoveGesture(float f) {
 			// view port update
 			if (viewportSize != 0) {
 				viewportStart -= f*viewportSize/graphwidth;
+				Log.d("graphView", f+" viewPortStart on move: "+viewportStart);
 
 				// minimal and maximal view limit
 				double minX = getMinX(true);
@@ -283,10 +289,10 @@ protected void onDraw(Canvas canvas) {
 			}
 			if (getGraphViewStyle().getVerticalLabelsWidth()==0 && getLayoutParams().width != textWidth+GraphViewConfig.BORDER) {
 				setLayoutParams(new LayoutParams(
-						(int) (textWidth+GraphViewConfig.BORDER), LayoutParams.FILL_PARENT));
+						(int) (textWidth+GraphViewConfig.BORDER), LayoutParams.MATCH_PARENT));
 			} else if (getGraphViewStyle().getVerticalLabelsWidth()!=0 && getGraphViewStyle().getVerticalLabelsWidth() != getLayoutParams().width) {
 				setLayoutParams(new LayoutParams(
-						getGraphViewStyle().getVerticalLabelsWidth(), LayoutParams.FILL_PARENT));
+						getGraphViewStyle().getVerticalLabelsWidth(), LayoutParams.MATCH_PARENT));
 			}
 
 			float border = GraphViewConfig.BORDER;
@@ -336,6 +342,8 @@ protected void onDraw(Canvas canvas) {
 	private final Rect textBounds = new Rect();
 	private boolean staticHorizontalLabels;
 	private boolean staticVerticalLabels;
+	private double minx = 0.0;
+	private double maxx = 0.0;
 
 	public GraphView(Context context, AttributeSet attrs) {
 		this(context, attrs.getAttributeValue(null, "title"));
@@ -366,7 +374,7 @@ public GraphView(Context context, String title) {
 		viewVerLabels = new VerLabelsView(context);
 		addView(viewVerLabels);
 		graphViewContentView = new GraphViewContentView(context);
-		addView(graphViewContentView, new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT, 1));
+		addView(graphViewContentView, new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT, 1));
 	}
 
 	private GraphViewDataInterface[] _values(int idxSeries) {
@@ -441,7 +449,7 @@ protected void drawLegend(Canvas canvas, float height, float width) {
 		}
 	}
 
-	abstract protected void drawSeries(Canvas canvas, GraphViewDataInterface[] values, float graphwidth, float graphheight, float border, double minX, double minY, double diffX, double diffY, float horstart, GraphViewSeriesStyle style);
+	abstract public void drawSeries(Canvas canvas, GraphViewDataInterface[] values, float graphwidth, float graphheight, float border, double minX, double minY, double diffX, double diffY, float horstart, GraphViewSeriesStyle style, int serieNum);
 
 	/**
 	 * formats the label
@@ -560,7 +568,7 @@ public float getLegendWidth() {
 	protected double getMaxX(boolean ignoreViewport) {
 		// if viewport is set, use this
 		if (!ignoreViewport && viewportSize != 0) {
-			return viewportStart+viewportSize;
+			return viewportStart+viewportSize+minx;
 		} else {
 			// otherwise use the max x value
 			// values must be sorted by x, so the last value has the largest X value
@@ -614,7 +622,7 @@ protected double getMaxY() {
 	protected double getMinX(boolean ignoreViewport) {
 		// if viewport is set, use this
 		if (!ignoreViewport && viewportSize != 0) {
-			return viewportStart;
+			return viewportStart + minx;
 		} else {
 			// otherwise use the min x value
 			// values must be sorted by x, so the first value has the smallest X value
@@ -883,4 +891,60 @@ public void setViewPort(double start, double size) {
 		viewportStart = start;
 		viewportSize = size;
 	}
+	
+	protected int getSeriesCount(){
+		return graphSeries.size();
+	}
+	
+	public void setMinX(double minx){
+		this.minx = minx;
+	}
+	
+	public void seekBarMove(int i){
+		// view port update
+		if (viewportSize != 0) {
+			viewportStart -= ((double)i)*0.594*viewportSize/graphViewContentView.graphwidth;
+			Log.d("graphView", i+" viewPortStart: "+viewportStart);
+
+			// minimal and maximal view limit
+			double minX = getMinX(true);
+			double maxX = getMaxX(true);
+			if (viewportStart < minX) {
+				viewportStart = minX;
+			} else if (viewportStart+viewportSize > maxX) {
+				viewportStart = maxX - viewportSize;
+			}
+
+			// labels have to be regenerated
+			if (!staticHorizontalLabels) horlabels = null;
+			if (!staticVerticalLabels) verlabels = null;
+			viewVerLabels.invalidate();
+		}
+		graphViewContentView.invalidate();
+	}
+	
+	public void saveCanvasAsImage(){
+		Bitmap  bitmap = Bitmap.createBitmap( this.getWidth(), this.getHeight(), Bitmap.Config.ARGB_8888);
+		Canvas canvas = new Canvas(bitmap);
+		this.draw(canvas); 
+		
+	    String root = Environment.getExternalStorageDirectory().toString();
+	    File myDir = new File(root + "/measuready_images");    
+	    myDir.mkdirs();
+	    Random generator = new Random();
+	    int n = 10000;
+	    n = generator.nextInt(n);
+	    String fname = "Graph-"+ n +".jpg";
+	    File file = new File (myDir, fname);
+	    if (file.exists ()) file.delete (); 
+	    try {
+	           FileOutputStream out = new FileOutputStream(file);
+	           bitmap.compress(Bitmap.CompressFormat.JPEG, 90, out);
+	           out.flush();
+	           out.close();
+
+	    } catch (Exception e) {
+	           e.printStackTrace();
+	    } 
+	}
 }
diff --git a/src/com/jjoe64/graphview/LineGraphView.java b/src/com/jjoe64/graphview/LineGraphView.java
index 538159415..2e6b2677e 100644
--- a/src/com/jjoe64/graphview/LineGraphView.java
+++ b/src/com/jjoe64/graphview/LineGraphView.java
@@ -51,7 +51,7 @@ public LineGraphView(Context context, String title) {
 	}
 
 	@Override
-	public void drawSeries(Canvas canvas, GraphViewDataInterface[] values, float graphwidth, float graphheight, float border, double minX, double minY, double diffX, double diffY, float horstart, GraphViewSeriesStyle style) {
+	public void drawSeries(Canvas canvas, GraphViewDataInterface[] values, float graphwidth, float graphheight, float border, double minX, double minY, double diffX, double diffY, float horstart, GraphViewSeriesStyle style, int serieNum) {
 		// draw background
 		double lastEndY = 0;
 		double lastEndX = 0;