Added some conveniance methods.

MPChartExample/src/com/xxmassdeveloper/mpchartexample/BarChartActivity.java

@@ -1,8 +1,14 @@
 
 package com.xxmassdeveloper.mpchartexample;
 
+import android.annotation.SuppressLint;
+import android.graphics.Canvas;
+import android.graphics.Paint;
+import android.graphics.PointF;
+import android.graphics.RectF;
 import android.graphics.Typeface;
 import android.os.Bundle;
+import android.util.Log;
 import android.view.Menu;
 import android.view.MenuItem;
 import android.view.WindowManager;
@@ -15,8 +21,10 @@
 import com.github.mikephil.charting.data.BarData;
 import com.github.mikephil.charting.data.BarDataSet;
 import com.github.mikephil.charting.data.BarEntry;
+import com.github.mikephil.charting.data.Entry;
 import com.github.mikephil.charting.data.filter.Approximator;
 import com.github.mikephil.charting.data.filter.Approximator.ApproximatorType;
+import com.github.mikephil.charting.interfaces.OnChartValueSelectedListener;
 import com.github.mikephil.charting.utils.Legend;
 import com.github.mikephil.charting.utils.Legend.LegendPosition;
 import com.github.mikephil.charting.utils.XLabels;
@@ -27,7 +35,7 @@
 
 import java.util.ArrayList;
 
-public class BarChartActivity extends DemoBase implements OnSeekBarChangeListener {
+public class BarChartActivity extends DemoBase implements OnSeekBarChangeListener, OnChartValueSelectedListener {
 
     private BarChart mChart;
     private SeekBar mSeekBarX, mSeekBarY;
@@ -47,6 +55,7 @@ protected void onCreate(Bundle savedInstanceState) {
         mSeekBarY = (SeekBar) findViewById(R.id.seekBar2);
 
         mChart = (BarChart) findViewById(R.id.chart1);
+        mChart.setOnChartValueSelectedListener(this);
 
         // enable the drawing of values
         mChart.setDrawYValues(true);
@@ -274,4 +283,17 @@ private void setData(int count, float range) {
 
         mChart.setData(data);
     }
+
+    @SuppressLint("NewApi")
+    @Override
+    public void onValueSelected(Entry e, int dataSetIndex) {
+
+        RectF bounds = mChart.getBarBounds((BarEntry) e);
+        PointF position = mChart.getPosition(e);
+
+        Log.i("bounds", bounds.toString());
+        Log.i("position", position.toString());
+    }
+
+    public void onNothingSelected() {};
 }

MPChartExample/src/com/xxmassdeveloper/mpchartexample/DrawChartActivity.java

@@ -1,6 +1,7 @@
 
 package com.xxmassdeveloper.mpchartexample;
 
+import android.graphics.Typeface;
 import android.os.Bundle;
 import android.util.Log;
 import android.view.Menu;
@@ -16,6 +17,8 @@
 import com.github.mikephil.charting.interfaces.OnChartValueSelectedListener;
 import com.github.mikephil.charting.interfaces.OnDrawListener;
 import com.github.mikephil.charting.utils.XLabels;
+import com.github.mikephil.charting.utils.YLabels;
+import com.github.mikephil.charting.utils.XLabels.XLabelPosition;
 import com.xxmassdeveloper.mpchartexample.notimportant.DemoBase;
 
 import java.util.ArrayList;
@@ -58,12 +61,24 @@ protected void onCreate(Bundle savedInstanceState) {
 
         // if disabled, drawn datasets with the finger will not be automatically
         // finished
-        mChart.setAutoFinish(false);
+        mChart.setAutoFinish(true);
+        mChart.setDrawGridBackground(false);
 
         mChart.setDrawLegend(false);
 
         // add dummy-data to the chart
         initWithDummyData();
+
+        Typeface tf = Typeface.createFromAsset(getAssets(), "OpenSans-Regular.ttf");
+
+        XLabels xl = mChart.getXLabels();
+        xl.setTypeface(tf);
+        xl.setAvoidFirstLastClipping(true);
+
+        YLabels yl = mChart.getYLabels();
+        yl.setTypeface(tf);
+
+        mChart.setValueTypeface(tf);
 
         mChart.setYRange(-40f, 40f, true);
         // call this to reset the changed y-range
@@ -73,13 +88,15 @@ protected void onCreate(Bundle savedInstanceState) {
     private void initWithDummyData() {
         ArrayList<String> xVals = new ArrayList<String>();
         for (int i = 0; i < 24; i++) {
-            xVals.add((i) + "h");
+            xVals.add((i) + ":00");
         }
 
         ArrayList<Entry> yVals = new ArrayList<Entry>();
 
         // create a dataset and give it a type (0)
         LineDataSet set1 = new LineDataSet(yVals, "DataSet");
+        set1.setLineWidth(3f);
+        set1.setCircleSize(5f);
 
         ArrayList<LineDataSet> dataSets = new ArrayList<LineDataSet>();
         dataSets.add(set1); // add the datasets

MPChartExample/src/com/xxmassdeveloper/mpchartexample/notimportant/MainActivity.java

@@ -2,7 +2,6 @@
 package com.xxmassdeveloper.mpchartexample.notimportant;
 
 import android.app.Activity;
-import android.app.AlertDialog;
 import android.content.Context;
 import android.content.Intent;
 import android.net.Uri;
@@ -25,6 +24,7 @@
 import com.xxmassdeveloper.mpchartexample.BarChartActivityMultiDataset;
 import com.xxmassdeveloper.mpchartexample.CandleStickChartActivity;
 import com.xxmassdeveloper.mpchartexample.CubicLineChartActivity;
+import com.xxmassdeveloper.mpchartexample.DrawChartActivity;
 import com.xxmassdeveloper.mpchartexample.DynamicalAddingActivity;
 import com.xxmassdeveloper.mpchartexample.InvertedLineChartActivity;
 import com.xxmassdeveloper.mpchartexample.LineChartActivity;
@@ -146,14 +146,14 @@ public void onItemClick(AdapterView<?> av, View v, int pos, long arg3) {
                 startActivity(i);
                 break;
             case 8:
-                // i = new Intent(this, DrawChartActivity.class);
-                // startActivity(i);
-
-                AlertDialog.Builder b = new AlertDialog.Builder(this);
-                b.setTitle("Feature not available");
-                b.setMessage("Due to recent changes to the data model of the library, this feature is temporarily not available.");
-                b.setPositiveButton("OK", null);
-                b.create().show();
+                 i = new Intent(this, DrawChartActivity.class);
+                 startActivity(i);
+
+//                AlertDialog.Builder b = new AlertDialog.Builder(this);
+//                b.setTitle("Feature not available");
+//                b.setMessage("Due to recent changes to the data model of the library, this feature is temporarily not available.");
+//                b.setPositiveButton("OK", null);
+//                b.create().show();
                 break;
             case 9:
                 i = new Intent(this, SimpleChartDemo.class);

MPChartLib/src/com/github/mikephil/charting/charts/BarChart.java

@@ -183,7 +183,7 @@ protected void calcMinMax(boolean fixedValues) {
 
     @Override
     protected void drawHighlights() {
-        
+
         int setCount = mOriginalData.getDataSetCount();
 
         for (int i = 0; i < mIndicesToHightlight.length; i++) {
@@ -202,11 +202,13 @@ protected void drawHighlights() {
                     && index < (mDeltaX * mPhaseX) / mOriginalData.getDataSetCount()) {
 
                 Entry e = getEntryByDataSetIndex(index, dataSetIndex);
-
-                if(e == null) continue;
+
+                if (e == null)
+                    continue;
 
                 // calculate the correct x-position
-                float x = index * setCount + dataSetIndex + mOriginalData.getGroupSpace() / 2f + mOriginalData.getGroupSpace() * index;
+                float x = index * setCount + dataSetIndex + mOriginalData.getGroupSpace() / 2f
+                        + mOriginalData.getGroupSpace() * index;
                 float y = e.getVal();
 
                 prepareBar(x, y, ds.getBarSpace());
@@ -234,10 +236,10 @@ protected void drawHighlights() {
 
     @Override
     protected void drawData() {
-        
+
         ArrayList<BarDataSet> dataSets = mOriginalData.getDataSets();
         int setCount = mOriginalData.getDataSetCount();
-        
+
         // the space between bar-groups
         float space = mOriginalData.getGroupSpace();
 
@@ -368,12 +370,13 @@ protected void drawXLabels(float yPos) {
         float[] position = new float[] {
                 0f, 0f
         };
-        
+
         int step = mCurrentData.getDataSetCount();
 
         for (int i = 0; i < mCurrentData.getXValCount(); i += mXLabels.mXAxisLabelModulus) {
 
-            position[0] = i * step + i * mOriginalData.getGroupSpace() + mOriginalData.getGroupSpace() / 2f;
+            position[0] = i * step + i * mOriginalData.getGroupSpace()
+                    + mOriginalData.getGroupSpace() / 2f;
 
             // center the text
             if (mXLabels.isCenterXLabelsEnabled())
@@ -418,7 +421,7 @@ protected void drawVerticalGrid() {
         float[] position = new float[] {
                 0f, 0f
         };
-        
+
         // take into consideration that multiple DataSets increase mDeltaX
         int step = mCurrentData.getDataSetCount();
 
@@ -733,7 +736,7 @@ public Highlight getHighlightByTouchPoint(float x, float y) {
 
         int setCount = mOriginalData.getDataSetCount();
         int valCount = setCount * mOriginalData.getXValCount();
-        
+
         // calculate the amount of bar-space between index 0 and touch position
         float space = (float) (((float) valCount / (float) setCount) / (mDeltaX / base));
 
@@ -749,6 +752,38 @@ public Highlight getHighlightByTouchPoint(float x, float y) {
         return new Highlight(xIndex, dataSetIndex);
     }
 
+    /**
+     * Returns the bounding box of the specified Entry in the specified DataSet.
+     * Returns null if the Entry could not be found in the charts data.
+     * 
+     * @param e
+     * @param dataSetIndex
+     * @return
+     */
+    public RectF getBarBounds(BarEntry e) {
+
+        BarDataSet set = mOriginalData.getDataSetForEntry(e);
+
+        if (set == null)
+            return null;
+
+        float barspace = set.getBarSpace();
+        float y = e.getVal();
+        float x = e.getXIndex();
+
+        float spaceHalf = barspace / 2f;
+        float left = x + spaceHalf;
+        float right = x + 1f - spaceHalf;
+        float top = y >= 0 ? y : 0;
+        float bottom = y <= 0 ? y : 0;
+
+        RectF bounds = new RectF(left, top, right, bottom);
+
+        transformRect(bounds);
+
+        return bounds;
+    }
+
     /**
      * sets the skew (default 0.3f), the skew indicates how much the 3D effect
      * of the chart is turned to the right

MPChartLib/src/com/github/mikephil/charting/charts/BarLineChartBase.java

@@ -10,12 +10,14 @@
 import android.graphics.Paint.Align;
 import android.graphics.Paint.Style;
 import android.graphics.Path;
+import android.graphics.PointF;
 import android.graphics.Rect;
 import android.util.AttributeSet;
 import android.util.Log;
 import android.view.MotionEvent;
 import android.view.ViewParent;
 
+import com.github.mikephil.charting.data.BarDataSet;
 import com.github.mikephil.charting.data.BarLineScatterCandleData;
 import com.github.mikephil.charting.data.BarLineScatterCandleRadarDataSet;
 import com.github.mikephil.charting.data.Entry;
@@ -1377,6 +1379,34 @@ public boolean hasFixedYValues() {
         return mFixedYValues;
     }
 
+    /**
+     * Returns the position (in pixels) the provided Entry has inside the chart
+     * view or null, if the provided Entry is null.
+     * 
+     * @param e
+     * @return
+     */
+    public PointF getPosition(Entry e) {
+
+        if (e == null)
+            return null;
+
+        float[] vals = new float[] {
+                e.getXIndex(), e.getVal()
+        };
+
+        if (this instanceof BarChart) {
+
+            BarDataSet set = (BarDataSet) mOriginalData.getDataSetForEntry(e);
+            if (set != null)
+                vals[0] += set.getBarSpace() / 2f;
+        }
+
+        transformPointArray(vals);
+
+        return new PointF(vals[0], vals[1]);
+    }
+
     /**
      * sets the color for the grid lines
      * 

MPChartLib/src/com/github/mikephil/charting/charts/Chart.java

@@ -445,14 +445,14 @@ protected void calcFormats() {
         if (!mUseCustomFormatter) {
 
             float reference = 0f;
-            
-            if(mOriginalData.getXValCount() < 2) {
-               
-                reference = Math.max(Math.abs(mYChartMin), Math.abs(mYChartMax));                
+
+            if (mOriginalData.getXValCount() < 2) {
+
+                reference = Math.max(Math.abs(mYChartMin), Math.abs(mYChartMax));
             } else {
                 reference = mDeltaY;
             }
-            
+
             int digits = Utils.getFormatDigits(reference);
 
             StringBuffer b = new StringBuffer();
@@ -1339,6 +1339,15 @@ public void setPhaseX(float phase) {
      */
     /** BELOW THIS ONLY GETTERS AND SETTERS */
 
+    /**
+     * Returns the canvas object the chart uses for drawing.
+     * 
+     * @return
+     */
+    public Canvas getCanvas() {
+        return mDrawCanvas;
+    }
+
     /**
      * set a selection listener for the chart
      * 

MPChartLib/src/com/github/mikephil/charting/data/ChartData.java

@@ -521,6 +521,31 @@ public boolean removeEntry(int xIndex, int dataSetIndex) {
         return removeEntry(e, dataSetIndex);
     }
 
+    /**
+     * Returns the DataSet that contains the provided Entry, or null, if no
+     * DataSet contains this Entry.
+     * 
+     * @param e
+     * @return
+     */
+    public T getDataSetForEntry(Entry e) {
+
+        if (e == null)
+            return null;
+
+        for (int i = 0; i < mDataSets.size(); i++) {
+
+            T set = mDataSets.get(i);
+
+            for (int j = 0; j < set.getEntryCount(); j++) {
+                if (e.equalTo(set.getEntryForXIndex(e.getXIndex())))
+                    return set;
+            }
+        }
+
+        return null;
+    }
+
     /**
      * Returns all colors used across all DataSet objects this object
      * represents.