Added square lines

hellocharts-library/src/lecho/lib/hellocharts/model/Line.java

@@ -30,6 +30,7 @@ public class Line {
     private boolean hasLabels = false;
     private boolean hasLabelsOnlyForSelected = false;
     private boolean isCubic = false;
+    private boolean isSquare = false;
     private boolean isFilled = false;
     private ValueShape shape = ValueShape.CIRCLE;
     private PathEffect pathEffect;
@@ -200,6 +201,19 @@ public boolean isCubic() {
 
     public Line setCubic(boolean isCubic) {
         this.isCubic = isCubic;
+        if(isSquare)
+            setSquare(false);
+        return this;
+    }
+
+    public boolean isSquare() {
+        return isSquare;
+    }
+
+    public Line setSquare(boolean isSquare) {
+        this.isSquare = isSquare;
+        if(isCubic)
+            setCubic(false);
         return this;
     }
 

hellocharts-library/src/lecho/lib/hellocharts/renderer/LineChartRenderer.java

@@ -114,6 +114,8 @@ public void draw(Canvas canvas) {
             if (line.hasLines()) {
                 if (line.isCubic()) {
                     drawSmoothPath(drawCanvas, line);
+                } else if (line.isSquare()) {
+                    drawSquarePath(drawCanvas, line);
                 } else {
                     drawPath(drawCanvas, line);
                 }
@@ -237,6 +239,38 @@ private void drawPath(Canvas canvas, final Line line) {
         path.reset();
     }
 
+    private void drawSquarePath(Canvas canvas, final Line line) {
+        prepareLinePaint(line);
+
+        int valueIndex = 0;
+        float previousRawY = 0;
+        for (PointValue pointValue : line.getValues()) {
+
+            final float rawX = computator.computeRawX(pointValue.getX());
+            final float rawY = computator.computeRawY(pointValue.getY());
+
+            if (valueIndex == 0) {
+                path.moveTo(rawX, rawY);
+            } else {
+                path.lineTo(rawX, previousRawY);
+                path.lineTo(rawX, rawY);
+            }
+
+            previousRawY = rawY;
+
+            ++valueIndex;
+
+        }
+
+        canvas.drawPath(path, linePaint);
+
+        if (line.isFilled()) {
+            drawArea(canvas, line);
+        }
+
+        path.reset();
+    }
+
     private void drawSmoothPath(Canvas canvas, final Line line) {
         prepareLinePaint(line);