/**
* enter a slice for a view updates model only
*
* @param item
*/
private void onEnter(PieItem item) {
if (mCurrentItem != null) {
mCurrentItem.setSelected(false);
}
if (item != null && item.isEnabled()) {
item.setSelected(true);
mCurrentItem = item;
if ((mCurrentItem != mOpenItem) && mCurrentItem.hasItems()) {
openCurrentItem();
}
} else {
mCurrentItem = null;
}
}
private void openCurrentItem() {
if ((mCurrentItem != null) && mCurrentItem.hasItems()) {
mCurrentItem.setSelected(false);
mOpenItem = mCurrentItem;
mOpening = true;
mXFade = new LinearAnimation(1, 0);
mXFade.setDuration(PIE_XFADE_DURATION);
mXFade.setAnimationListener(
new AnimationListener() {
@Override
public void onAnimationStart(Animation animation) {}
@Override
public void onAnimationEnd(Animation animation) {
mXFade = null;
}
@Override
public void onAnimationRepeat(Animation animation) {}
});
mXFade.startNow();
mOverlay.startAnimation(mXFade);
}
}
private void layoutItems(List<PieItem> items, float centerAngle, int inner, int outer, int gap) {
float emptyangle = PIE_SWEEP / 16;
float sweep = (float) (PIE_SWEEP - 2 * emptyangle) / items.size();
float angle = centerAngle - PIE_SWEEP / 2 + emptyangle + sweep / 2;
// check if we have custom geometry
// first item we find triggers custom sweep for all
// this allows us to re-use the path
for (PieItem item : items) {
if (item.getCenter() >= 0) {
sweep = item.getSweep();
break;
}
}
Path path = makeSlice(getDegrees(0) - gap, getDegrees(sweep) + gap, outer, inner, mCenter);
for (PieItem item : items) {
// shared between items
item.setPath(path);
if (item.getCenter() >= 0) {
angle = item.getCenter();
}
int w = item.getIntrinsicWidth();
int h = item.getIntrinsicHeight();
// move views to outer border
int r = inner + (outer - inner) * 2 / 3;
int x = (int) (r * Math.cos(angle));
int y = mCenter.y - (int) (r * Math.sin(angle)) - h / 2;
x = mCenter.x + x - w / 2;
item.setBounds(x, y, x + w, y + h);
float itemstart = angle - sweep / 2;
item.setGeometry(itemstart, sweep, inner, outer);
if (item.hasItems()) {
layoutItems(item.getItems(), angle, inner, outer + mRadiusInc / 2, gap);
}
angle += sweep;
}
}
@Override
public boolean onTouchEvent(MotionEvent evt) {
float x = evt.getX();
float y = evt.getY();
int action = evt.getActionMasked();
PointF polar = getPolar(x, y, !(mTapMode));
if (MotionEvent.ACTION_DOWN == action) {
mDown.x = (int) evt.getX();
mDown.y = (int) evt.getY();
mOpening = false;
if (mTapMode) {
PieItem item = findItem(polar);
if ((item != null) && (mCurrentItem != item)) {
mState = STATE_PIE;
onEnter(item);
}
} else {
setCenter((int) x, (int) y);
show(true);
}
return true;
} else if (MotionEvent.ACTION_UP == action) {
if (isVisible()) {
PieItem item = mCurrentItem;
if (mTapMode) {
item = findItem(polar);
if (item != null && mOpening) {
mOpening = false;
return true;
}
}
if (item == null) {
mTapMode = false;
show(false);
} else if (!mOpening && !item.hasItems()) {
item.performClick();
startFadeOut();
mTapMode = false;
}
return true;
}
} else if (MotionEvent.ACTION_CANCEL == action) {
if (isVisible() || mTapMode) {
show(false);
}
deselect();
return false;
} else if (MotionEvent.ACTION_MOVE == action) {
if (polar.y < mRadius) {
if (mOpenItem != null) {
mOpenItem = null;
} else {
deselect();
}
return false;
}
PieItem item = findItem(polar);
boolean moved = hasMoved(evt);
if ((item != null) && (mCurrentItem != item) && (!mOpening || moved)) {
// only select if we didn't just open or have moved past slop
mOpening = false;
if (moved) {
// switch back to swipe mode
mTapMode = false;
}
onEnter(item);
}
}
return false;
}
