@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
for (Figure figure : mFigures) {
figure.draw(canvas);
}
}
@Override
public boolean onScale(ScaleGestureDetector detector) {
if (mActiveIndex >= 0) {
mScaleFactor *= detector.getScaleFactor();
mScaleFactor = Math.max(0.1f, Math.min(mScaleFactor, 5.0f));
Figure f = mFigures.get(mActiveIndex);
f.width = (int) (origWidth * mScaleFactor);
f.height = (int) (origHeight * mScaleFactor);
f.x = origX - (f.width - origWidth) / 2;
f.y = origY - (f.height - origHeight) / 2;
invalidate();
return true;
}
return false;
}
public void addFigure(Figure figure, boolean invalidate) {
int typeIndex;
if (typeIndexes.containsKey(figure.type)) {
typeIndex = typeIndexes.get(figure.type) + 1;
} else {
typeIndex = 0;
}
typeIndexes.put(figure.type, typeIndex);
figure.setColorIndex(typeIndex);
mFigures.add(figure);
if (invalidate) invalidate();
}
@Override
public boolean onTouchEvent(MotionEvent ev) {
// return or not?
mScaleDetector.onTouchEvent(ev);
mGestureDetector.onTouchEvent(ev);
final int action = MotionEventCompat.getActionMasked(ev);
switch (action) {
case MotionEvent.ACTION_DOWN:
{
final int pointerIndex = MotionEventCompat.getActionIndex(ev);
final float x = MotionEventCompat.getX(ev, pointerIndex);
final float y = MotionEventCompat.getY(ev, pointerIndex);
int index = getActiveIndexByXY(x, y);
if (index >= 0) {
mActiveIndex = index;
mLastTouchX = x;
mLastTouchY = y;
mActivePointerId = MotionEventCompat.getPointerId(ev, 0);
}
break;
}
case MotionEvent.ACTION_MOVE:
if (mActivePointerId != INVALID_POINTER_ID) {
final int pointerIndex = MotionEventCompat.findPointerIndex(ev, mActivePointerId);
final float x = MotionEventCompat.getX(ev, pointerIndex);
final float y = MotionEventCompat.getY(ev, pointerIndex);
final float dx = x - mLastTouchX;
final float dy = y - mLastTouchY;
Figure figure = mFigures.get(mActiveIndex);
figure.x += dx;
figure.y += dy;
mLastTouchX = x;
mLastTouchY = y;
invalidate();
}
break;
case MotionEvent.ACTION_UP:
{
if (mActiveIndex >= 0) {
if (mUpdateFigureListener != null) {
mUpdateFigureListener.onUpdate(mFigures.get(mActiveIndex));
}
mActiveIndex = -1;
}
mActivePointerId = INVALID_POINTER_ID;
break;
}
case MotionEvent.ACTION_CANCEL:
{
mActivePointerId = INVALID_POINTER_ID;
mActiveIndex = -1;
break;
}
case MotionEvent.ACTION_POINTER_UP:
final int pointerIndex = MotionEventCompat.getActionIndex(ev);
final int pointerId = MotionEventCompat.getPointerId(ev, pointerIndex);
if (pointerId == mActivePointerId) {
final int newPointerIndex = pointerIndex == 0 ? 1 : 0;
mLastTouchX = MotionEventCompat.getX(ev, newPointerIndex);
mLastTouchY = MotionEventCompat.getY(ev, newPointerIndex);
mActivePointerId = MotionEventCompat.getPointerId(ev, newPointerIndex);
}
break;
}
return true;
}