setMatrix method for the CircularProgressBar

library-circular/src/main/java/fr.castorflex.android.circularprogressbar/CircularProgressBar.java

@@ -3,6 +3,7 @@
 import android.content.Context;
 import android.content.res.Resources;
 import android.content.res.TypedArray;
+import android.graphics.Matrix;
 import android.graphics.drawable.Drawable;
 import android.util.AttributeSet;
 import android.widget.ProgressBar;
@@ -78,4 +79,10 @@ public void progressiveStop() {
   public void progressiveStop(CircularProgressDrawable.OnEndListener listener) {
     checkIndeterminateDrawable().progressiveStop(listener);
   }
+
+  /** Sets a matrix object to apply on the drawable */
+  public void setMatrix(Matrix matrix) {
+    CircularProgressDrawable drawable = (CircularProgressDrawable) getIndeterminateDrawable();
+    drawable.setMatrix(matrix);
+  }
 }

library-circular/src/main/java/fr.castorflex.android.circularprogressbar/CircularProgressDrawable.java

@@ -7,6 +7,7 @@
 import android.graphics.Canvas;
 import android.graphics.Color;
 import android.graphics.ColorFilter;
+import android.graphics.Matrix;
 import android.graphics.Paint;
 import android.graphics.PixelFormat;
 import android.graphics.Rect;
@@ -69,6 +70,9 @@ public interface OnEndListener {
   private int          mMaxSweepAngle;
   private boolean      mFirstSweepAnimation;
 
+  /** The matrix object to apply on the canvas */
+  private Matrix mMatrix;
+
   private CircularProgressDrawable(int[] colors,
                                    float borderWidth,
                                    float sweepSpeed,
@@ -118,6 +122,9 @@ public void draw(Canvas canvas) {
       startAngle = (startAngle + (sweepAngle - newSweepAngle)) % 360;
       sweepAngle = newSweepAngle;
     }
+    if(mMatrix != null) {
+      canvas.concat(mMatrix);
+    }
     canvas.drawArc(fBounds, startAngle, sweepAngle, false, mPaint);
   }
 
@@ -383,6 +390,22 @@ private void setEndRatio(float ratio) {
     invalidateSelf();
   }
 
+  /**
+   * Returns a matrix object that associated with the canvas
+   * @return
+   */
+  public Matrix getMatrix() {
+    return mMatrix;
+  }
+
+  /**
+   * Sets a matrix object that associated with the canvas
+   * @param matrix
+   */
+  public void setMatrix(Matrix matrix) {
+    this.mMatrix = matrix;
+  }
+
   public static class Builder {
     private int[] mColors;
     private float mSweepSpeed;