@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 onReset() {
/** If the extras are not enabled, just call up to super and return. */
if (!mListViewExtrasEnabled) {
super.onReset();
return;
}
final LoadingLayout originalLoadingLayout, listViewLoadingLayout;
final int scrollToHeight, selection;
final boolean scrollLvToEdge;
switch (getCurrentMode()) {
case MANUAL_REFRESH_ONLY:
case PULL_FROM_END:
originalLoadingLayout = getFooterLayout();
listViewLoadingLayout = mFooterLoadingView;
selection = mRefreshableView.getCount() - 1;
scrollToHeight = getFooterSize();
scrollLvToEdge = Math.abs(mRefreshableView.getLastVisiblePosition() - selection) <= 1;
break;
case PULL_FROM_START:
default:
originalLoadingLayout = getHeaderLayout();
listViewLoadingLayout = mHeaderLoadingView;
scrollToHeight = -getHeaderSize();
selection = 0;
scrollLvToEdge = Math.abs(mRefreshableView.getFirstVisiblePosition() - selection) <= 1;
break;
}
// If the ListView header loading layout is showing, then we need to
// flip so that the original one is showing instead
if (listViewLoadingLayout.getVisibility() == View.VISIBLE) {
// Set our Original View to Visible
originalLoadingLayout.showInvisibleViews();
// Hide the ListView Header/Footer
listViewLoadingLayout.setVisibility(View.GONE);
/**
* Scroll so the View is at the same Y as the ListView header/footer, but only scroll if:
* we've pulled to refresh, it's positioned correctly
*/
if (scrollLvToEdge && getState() != State.MANUAL_REFRESHING) {
mRefreshableView.setSelection(selection);
setHeaderScroll(scrollToHeight);
}
}
// Finally, call up to super
super.onReset();
}
@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 handleStyledAttributes(TypedArray a) {
super.handleStyledAttributes(a);
mListViewExtrasEnabled = a.getBoolean(R.styleable.PullToRefresh_ptrListViewExtrasEnabled, true);
if (mListViewExtrasEnabled) {
final FrameLayout.LayoutParams lp =
new FrameLayout.LayoutParams(
FrameLayout.LayoutParams.MATCH_PARENT,
FrameLayout.LayoutParams.WRAP_CONTENT,
Gravity.CENTER_HORIZONTAL);
// Create Loading Views ready for use later
FrameLayout frame = new FrameLayout(getContext());
mHeaderLoadingView = createLoadingLayout(getContext(), Mode.PULL_FROM_START, a);
mHeaderLoadingView.setVisibility(View.GONE);
frame.addView(mHeaderLoadingView, lp);
mRefreshableView.addHeaderView(frame, null, false);
mLvFooterLoadingFrame = new FrameLayout(getContext());
mFooterLoadingView = createLoadingLayout(getContext(), Mode.PULL_FROM_END, a);
mFooterLoadingView.setVisibility(View.GONE);
mLvFooterLoadingFrame.addView(mFooterLoadingView, lp);
/**
* If the value for Scrolling While Refreshing hasn't been explicitly set via XML, enable
* Scrolling While Refreshing.
*/
if (!a.hasValue(R.styleable.PullToRefresh_ptrScrollingWhileRefreshingEnabled)) {
setScrollingWhileRefreshingEnabled(true);
}
}
}
public void setReleaseLabel(String releaseLabel, Mode mode) {
super.setReleaseLabel(releaseLabel, mode);
if (null != mHeaderLoadingView && mode.canPullDown()) {
mHeaderLoadingView.setReleaseLabel(releaseLabel);
}
if (null != mFooterLoadingView && mode.canPullUp()) {
mFooterLoadingView.setReleaseLabel(releaseLabel);
}
}
public void setRefreshingLabel(String refreshingLabel) {
super.setRefreshingLabel(refreshingLabel);
if (null != mHeaderLoadingView) {
mHeaderLoadingView.setRefreshingLabel(refreshingLabel);
}
if (null != mFooterLoadingView) {
mFooterLoadingView.setRefreshingLabel(refreshingLabel);
}
}
public void setPullLabel(String pullLabel) {
super.setPullLabel(pullLabel);
if (null != mHeaderLoadingView) {
mHeaderLoadingView.setPullLabel(pullLabel);
}
if (null != mFooterLoadingView) {
mFooterLoadingView.setPullLabel(pullLabel);
}
}
@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);
}
}
