@Override
public void onDraw(Canvas canvas) {
float alpha = 1;
if (mXFade != null) {
alpha = mXFade.getValue();
} else if (mFadeIn != null) {
alpha = mFadeIn.getValue();
}
int state = canvas.save();
if (mFadeIn != null) {
float sf = 0.9f + alpha * 0.1f;
canvas.scale(sf, sf, mCenter.x, mCenter.y);
}
drawFocus(canvas);
if (mState == STATE_FINISHING) {
canvas.restoreToCount(state);
return;
}
if ((mOpenItem == null) || (mXFade != null)) {
// draw base menu
for (PieItem item : mItems) {
drawItem(canvas, item, alpha);
}
}
if (mOpenItem != null) {
for (PieItem inner : mOpenItem.getItems()) {
drawItem(canvas, inner, (mXFade != null) ? (1 - 0.5f * alpha) : 1);
}
}
canvas.restoreToCount(state);
}
/**
* @param polar x: angle, y: dist
* @return the item at angle/dist or null
*/
private PieItem findItem(PointF polar) {
// find the matching item:
List<PieItem> items = (mOpenItem != null) ? mOpenItem.getItems() : mItems;
for (PieItem item : items) {
if (inside(polar, item)) {
return item;
}
}
return null;
}
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;
}
}