/**
* Checks if the edge glow should be used enabled. The glow is not enabled unless there are more
* views than can fit on the screen at one time.
*/
private boolean isEdgeGlowEnabled() {
if (mAdapter == null || mAdapter.isEmpty()) return false;
// If the maxx is more then zero then the user can scroll, so the edge
// effects should be shown
return mMaxX > 0;
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
int newHeight = 0;
final int heightMode = MeasureSpec.getMode(heightMeasureSpec);
int heightSize = MeasureSpec.getSize(heightMeasureSpec);
if (heightMode != MeasureSpec.EXACTLY) {
ListAdapter listAdapter = getAdapter();
if (listAdapter != null && !listAdapter.isEmpty()) {
int listPosition = 0;
for (listPosition = 0;
listPosition < listAdapter.getCount() && listPosition < MAXIMUM_LIST_ITEMS_VIEWABLE;
listPosition++) {
View listItem = listAdapter.getView(listPosition, null, this);
// now it will not throw a NPE if listItem is a ViewGroup instance
if (listItem instanceof ViewGroup) {
listItem.setLayoutParams(
new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
}
listItem.measure(widthMeasureSpec, heightMeasureSpec);
newHeight += listItem.getMeasuredHeight();
}
newHeight += getDividerHeight() * listPosition;
}
if ((heightMode == MeasureSpec.AT_MOST) && (newHeight > heightSize)) {
if (newHeight > heightSize) {
newHeight = heightSize;
}
}
} else {
newHeight = getMeasuredHeight();
}
setMeasuredDimension(getMeasuredWidth(), newHeight);
}
@Override
protected void setRefreshingInternal(boolean doScroll) {
// If we're not showing the Refreshing view, or the list is empty, then
// the header/footer views won't show so we use the
// normal method
ListAdapter adapter = mRefreshableView.getAdapter();
if (!getShowViewWhileRefreshing() || null == adapter || adapter.isEmpty()) {
super.setRefreshingInternal(doScroll);
return;
}
super.setRefreshingInternal(false);
final LoadingLayout originalLoadingLayout, listViewLoadingLayout;
final int selection, scrollToY;
switch (getCurrentMode()) {
case PULL_UP_TO_REFRESH:
originalLoadingLayout = getFooterLayout();
listViewLoadingLayout = mFooterLoadingView;
selection = mRefreshableView.getCount() - 1;
scrollToY = getScrollY() - getHeaderHeight();
break;
case PULL_DOWN_TO_REFRESH:
default:
originalLoadingLayout = getHeaderLayout();
listViewLoadingLayout = mHeaderLoadingView;
selection = 0;
scrollToY = getScrollY() + getHeaderHeight();
break;
}
if (doScroll) {
// We scroll slightly so that the ListView's header/footer is at the
// same Y position as our normal header/footer
setHeaderScroll(scrollToY);
}
// Hide our original Loading View
originalLoadingLayout.setVisibility(View.INVISIBLE);
// Show the ListView Loading View and set it to refresh
listViewLoadingLayout.setVisibility(View.VISIBLE);
listViewLoadingLayout.refreshing();
if (doScroll) {
// Make sure the ListView is scrolled to show the loading
// header/footer
mRefreshableView.setSelection(selection);
// Smooth scroll as normal
smoothScrollTo(0);
}
}
@Override
protected void resetHeader() {
// If we're not showing the Refreshing view, or the list is empty, then
// the header/footer views won't show so we use the
// normal method
ListAdapter adapter = mRefreshableView.getAdapter();
if (!getShowViewWhileRefreshing() || null == adapter || adapter.isEmpty()) {
super.resetHeader();
return;
}
LoadingLayout originalLoadingLayout;
LoadingLayout listViewLoadingLayout;
int scrollToHeight = getHeaderHeight();
int selection;
boolean scroll;
switch (getCurrentMode()) {
case PULL_UP_TO_REFRESH:
originalLoadingLayout = getFooterLayout();
listViewLoadingLayout = mFooterLoadingView;
selection = mRefreshableView.getCount() - 1;
scroll = mRefreshableView.getLastVisiblePosition() == selection;
break;
case PULL_DOWN_TO_REFRESH:
default:
originalLoadingLayout = getHeaderLayout();
listViewLoadingLayout = mHeaderLoadingView;
scrollToHeight *= -1;
selection = 0;
scroll = mRefreshableView.getFirstVisiblePosition() == selection;
break;
}
// Set our Original View to Visible
originalLoadingLayout.setVisibility(View.VISIBLE);
/**
* Scroll so the View is at the same Y as the ListView header/footer, but only scroll if we've
* pulled to refresh and it's positioned correctly
*/
if (scroll && getState() != MANUAL_REFRESHING) {
mRefreshableView.setSelection(selection);
setHeaderScroll(scrollToHeight);
}
// Hide the ListView Header/Footer
listViewLoadingLayout.setVisibility(View.GONE);
super.resetHeader();
}
@Override
protected void resetHeader() {
// If we're empty, then the header/footer views won't show so we use the
// normal method
ListAdapter adapter = mRefreshableView.getAdapter();
if (null == adapter || adapter.isEmpty()) {
super.resetHeader();
return;
}
LoadingLayout originalLoadingLayout;
LoadingLayout listViewLoadingLayout;
int scrollToHeight = getHeaderHeight();
final boolean doScroll;
switch (getCurrentMode()) {
case MODE_PULL_UP_TO_REFRESH:
originalLoadingLayout = getFooterLayout();
listViewLoadingLayout = mFooterLoadingView;
doScroll = isReadyForPullUp();
break;
case MODE_PULL_DOWN_TO_REFRESH:
default:
originalLoadingLayout = getHeaderLayout();
listViewLoadingLayout = mHeaderLoadingView;
scrollToHeight *= -1;
doScroll = isReadyForPullDown();
break;
}
// Set our Original View to Visible
originalLoadingLayout.setVisibility(View.VISIBLE);
// Scroll so our View is at the same Y as the ListView header/footer,
// but only scroll if the ListView is at the top/bottom
if (doScroll) {
setHeaderScroll(scrollToHeight);
}
// Hide the ListView Header/Footer
listViewLoadingLayout.setVisibility(View.GONE);
super.resetHeader();
}
@Override
protected void onRefreshing(final boolean doScroll) {
/**
* If we're not showing the Refreshing view, or the list is empty, the the header/footer views
* won't show so we use the normal method.
*/
ListAdapter adapter = mRefreshableView.getAdapter();
if (!mListViewExtrasEnabled
|| !getShowViewWhileRefreshing()
|| null == adapter
|| adapter.isEmpty()) {
super.onRefreshing(doScroll);
return;
}
//
super.onRefreshing(false);
//
final LoadingLayout origLoadingView, listViewLoadingView, oppositeListViewLoadingView;
final int selection, scrollToY;
switch (getCurrentMode()) {
case MANUAL_REFRESH_ONLY:
case PULL_FROM_END:
origLoadingView = getFooterLayout();
listViewLoadingView = mFooterLoadingView;
oppositeListViewLoadingView = mHeaderLoadingView;
selection = mRefreshableView.getCount() - 1;
scrollToY = getScrollY() - getFooterSize();
// smoothScrollTo(0);
smoothScrollTo(getFooterSize());
break;
case PULL_FROM_START:
default:
origLoadingView = getHeaderLayout();
listViewLoadingView = mHeaderLoadingView;
oppositeListViewLoadingView = mFooterLoadingView;
selection = 0;
scrollToY = (int) (getScrollY() + getHeaderSize() * LoadingLayout.SCALE_REFRESHING);
smoothScrollTo((int) (-getHeaderSize() * LoadingLayout.SCALE_REFRESHING));
break;
}
oppositeListViewLoadingView.setVisibility(View.GONE);
}
@Override
public boolean isEmpty() {
return mAdapter == null || mAdapter.isEmpty();
}
@Override
public boolean isEmpty() {
return wrapped.isEmpty();
}
@Override
protected void onRefreshing(final boolean doScroll) {
/**
* If we're not showing the Refreshing view, or the list is empty, the the header/footer views
* won't show so we use the normal method.
*/
ListAdapter adapter = mRefreshableView.getAdapter();
if (!mListViewExtrasEnabled
|| !getShowViewWhileRefreshing()
|| null == adapter
|| adapter.isEmpty()) {
super.onRefreshing(doScroll);
return;
}
super.onRefreshing(false);
final LoadingLayout origLoadingView, listViewLoadingView, oppositeListViewLoadingView;
final int selection, scrollToY;
switch (getCurrentMode()) {
case MANUAL_REFRESH_ONLY:
case PULL_FROM_END:
origLoadingView = getFooterLayout();
listViewLoadingView = mFooterLoadingView;
oppositeListViewLoadingView = mHeaderLoadingView;
selection = mRefreshableView.getCount() - 1;
scrollToY = getScrollY() - getFooterSize();
break;
case PULL_FROM_START:
default:
origLoadingView = getHeaderLayout();
listViewLoadingView = mHeaderLoadingView;
oppositeListViewLoadingView = mFooterLoadingView;
selection = 0;
scrollToY = getScrollY() + getHeaderSize();
break;
}
// Hide our original Loading View
origLoadingView.reset();
origLoadingView.hideAllViews();
// Make sure the opposite end is hidden too
oppositeListViewLoadingView.setVisibility(View.GONE);
// Show the ListView Loading View and set it to refresh.
listViewLoadingView.setVisibility(View.VISIBLE);
listViewLoadingView.refreshing();
if (doScroll) {
// We need to disable the automatic visibility changes for now
disableLoadingLayoutVisibilityChanges();
// We scroll slightly so that the ListView's header/footer is at the
// same Y position as our normal header/footer
setHeaderScroll(scrollToY);
// Make sure the ListView is scrolled to show the loading
// header/footer
mRefreshableView.setSelection(selection);
// Smooth scroll as normal
smoothScrollTo(0);
}
}
@Override
public boolean isEmpty() {
return mBaseAdapter.isEmpty();
}
@Override
public boolean isEmpty() {
return (mAdapter == null || mAdapter.isEmpty()) && getHeadersCount() == 0;
}