Pen SDK for devices with stylus.To simplify the interface of scribble, we introduce TouchHelper class in onyxsdk-pen.

Compared to Scribble SDK, Pen SDK is a lighter weight library.

Add the following dependencies to your app's build.gradle file

    compile('com.onyx.android.sdk:onyxsdk-pen:1.4.10.1')

        TouchHelper.create(view, callback)
				   .setStrokeWidth(3.0f)
                   .setLimitRect(limit, exclude)
                   .openRawDrawing();

view is that you want to scribe. callback is RawInputCallback that you can receive data being scribbled. limit is a rect specify the region you want to scribble on the view. exclude is a list of Rect to be excluded from the view.

After TouchHelper().openRawDrawing(), you can call touchHelper.setRawDrawingEnabled(true) to start scribbling, touchHelper.setRawDrawingEnabled(false); to pause.

You can call touchHelper.setRawDrawingRenderEnabled(false) to disable render during scribble.

You can call touchHelper.setStrokeStyle(); to set stroke style.

In order to fully stop TouchHelper, you need call touchHelper.closeRawDrawing().

• pen : onBeginRawDrawing() -> onRawDrawingTouchPointMoveReceived() -> onRawDrawingTouchPointListReceived() -> onEndRawDrawing()
• erase : onBeginRawErasing() -> onRawErasingTouchPointMoveReceived() -> onRawErasingTouchPointListReceived() -> onEndRawErasing()

        new RawInputCallback() {

        @Override
        public void onBeginRawDrawing(boolean b, TouchPoint touchPoint) {
          // begin of stylus data
        }

        @Override
        public void onEndRawDrawing(boolean b, TouchPoint touchPoint) {
         // end of stylus data
        }

        @Override
        public void onRawDrawingTouchPointMoveReceived(TouchPoint touchPoint) {
           // stylus data during stylus moving
        }

        @Override
        public void onRawDrawingTouchPointListReceived(TouchPointList touchPointList) {
        	// cumulation of stylus data of stylus moving, you will receive it before onEndRawDrawing
        }

        @Override
        public void onBeginRawErasing(boolean b, TouchPoint touchPoint) {
       		// same as RawData, but triggered by stylus eraser button
        }

        @Override
        public void onEndRawErasing(boolean b, TouchPoint touchPoint) {
            // same as RawData, but triggered by stylus eraser button
        }

        @Override
        public void onRawErasingTouchPointMoveReceived(TouchPoint touchPoint) {
  			// same as RawData, but triggered by stylus eraser button
        }

        @Override
        public void onRawErasingTouchPointListReceived(TouchPointList touchPointList) {
 			 // same as RawData, but triggered by stylus eraser button
        }
    };

Reference to the ScribbleTouchHelperDemoActivity

• create(View view, RawInputCallback callback) view, you want to scrrible; callback, you can receive data being scribbled.
• setLimitRect(Rect limit, List<Rect> exclude) limit, a rect specify the region you want to scribble on the view. exclude, a list of Rect to be excluded from the view.
• setStrokeWidth(float var1)set the width for stroking.
• setRawDrawingEnabled(boolean enable) Set true, you enter scribble mode, and the screen will not refresh.
• setRawDrawingRenderEnabled(boolean enable) set false, disable render during scribble.
• openRawDrawing() Turn on scribble and initialize resources.
• closeRawDrawing() Turn off scribble and release resources. Unlock the screen, screen can refresh..
• setStrokeStyle(int style) Support style: TouchHelper.STROKE_STYLE_FOUNTAIN, TouchHelper.STROKE_STYLE_PENCIL

BrushRender is use to scribble pressure, for more detail to see ScribbleTouchHelperDemoActivity

    /**
     * 
     * @param canvas
     * @param paint
     * @param points
     * @param strokeWidth
     * @param maxTouchPressure
     *        invoke EpdController.getMaxTouchPressure() to get pressure parameter
     */
    public static void drawStroke(final Canvas canvas,final Paint paint,final List<TouchPoint> points,final float strokeWidth,final float maxTouchPressure)

Add BrushRender API

Fix issue of stroke style

TouchHelper add setStrokeStyle(int style).

Simplify the Scribble SDK, init pen sdk.