@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
if (mDisplay != null) {
mDisplay.draw(canvas);
}
}
@Override
public boolean onTouchEvent(MotionEvent event) {
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
mOldX = event.getX();
mOldY = event.getY();
return true;
case MotionEvent.ACTION_MOVE:
break;
case MotionEvent.ACTION_UP:
case MotionEvent.ACTION_CANCEL:
float x = mDisplay.getPercentX() * getMeasuredWidth();
float y = mDisplay.getPercentY() * getMeasuredHeight();
float deltaX = event.getX() - mOldX;
float deltaY = event.getY() - mOldY;
mDisplay.setPercentX((x + deltaX) / getMeasuredWidth());
mDisplay.setPercentY((y + deltaY) / getMeasuredHeight());
invalidate();
postInvalidate();
break;
}
return super.onTouchEvent(event);
}
private void init(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
TypedArray typedArray = context.obtainStyledAttributes(attrs, R.styleable.LSystemView);
// Instantiate Display
String className = typedArray.getString(R.styleable.LSystemView_ls_display_class);
if (!TextUtils.isEmpty(className)) {
try {
mDisplay = (Display) Class.forName(className).newInstance();
} catch (Exception e) {
Log.e(TAG, "", e);
}
}
/* Display properties */
if (mDisplay != null) {
mDisplay.setDirection(
typedArray.getFloat(R.styleable.LSystemView_ls_direction, mDisplay.getDirection()));
mDisplay.setAngle(typedArray.getFloat(R.styleable.LSystemView_ls_angle, mDisplay.getAngle()));
mDisplay.setStep(typedArray.getFloat(R.styleable.LSystemView_ls_step, mDisplay.getStep()));
mDisplay.setIterations(
typedArray.getInteger(R.styleable.LSystemView_ls_iterations, mDisplay.getIterations()));
mDisplay.setPercentX(
typedArray.getFraction(
R.styleable.LSystemView_ls_position_x, 1, 1, mDisplay.getPercentX()));
mDisplay.setPercentY(
typedArray.getFraction(
R.styleable.LSystemView_ls_position_y, 1, 1, mDisplay.getPercentY()));
mDisplay.setColor(
typedArray.getColor(R.styleable.LSystemView_ls_paint_color, mDisplay.getColor()));
}
typedArray.recycle();
}