/**
* Counts the number of items that would be need to fill out the last row in the group of items
* with the given header.
*
* @param header Header set of items are grouped by.
* @return The count of unfilled spaces in the last row.
*/
private int unFilledSpacesInHeaderGroup(int header) {
// If mNumColumns is equal to zero we will have a divide by 0 exception
if (mNumColumns == 0) {
return 0;
}
int remainder = mDelegate.getCountForHeader(header) % mNumColumns;
return remainder == 0 ? 0 : mNumColumns - remainder;
}
protected void updateCount() {
mCount = 0;
int numHeaders = mDelegate.getNumHeaders();
if (numHeaders == 0) {
mCount = mDelegate.getCount();
mCounted = true;
return;
}
for (int i = 0; i < numHeaders; i++) {
mCount += mDelegate.getCountForHeader(i) + mNumColumns;
}
mCounted = true;
}
protected Position translatePosition(int position) {
int numHeaders = mDelegate.getNumHeaders();
if (numHeaders == 0) {
if (position >= mDelegate.getCount()) {
return new Position(POSITION_FILLER, 0);
}
return new Position(position, 0);
}
// Translate GridView position to Adapter position.
int adapterPosition = position;
int place = position;
int i;
for (i = 0; i < numHeaders; i++) {
int sectionCount = mDelegate.getCountForHeader(i);
// Skip past fake items making space for header in front of
// sections.
if (place == 0) {
// Position is first column where header will be.
return new Position(POSITION_HEADER, i);
}
place -= mNumColumns;
if (place < 0) {
// Position is a fake so return null.
return new Position(POSITION_HEADER_FILLER, i);
}
adapterPosition -= mNumColumns;
if (place < sectionCount) {
return new Position(adapterPosition, i);
}
// Skip past section end of section row filler;
int filler = unFilledSpacesInHeaderGroup(i);
adapterPosition -= filler;
place -= sectionCount + filler;
if (place < 0) {
// Position is a fake so return null.
return new Position(POSITION_FILLER, i);
}
}
// Position is a fake.
return new Position(POSITION_FILLER, i);
}
@Override
public int getCount() {
if (mCounted) {
return mCount;
}
mCount = 0;
int numHeaders = mDelegate.getNumHeaders();
if (numHeaders == 0) {
mCount = mDelegate.getCount();
mCounted = true;
return mCount;
}
for (int i = 0; i < numHeaders; i++) {
// Pad count with space for header and trailing filler in header
// group.
mCount += mDelegate.getCountForHeader(i) + unFilledSpacesInHeaderGroup(i) + mNumColumns;
}
mCounted = true;
return mCount;
}