@@ -13,8 +13,7 @@ typedef Widget SectionHeaderCallBack(int section);
1313typedef double SectionHeaderHeightCallBack (int section);
1414typedef double DividerHeightCallBack ();
1515typedef double CellHeightAtIndexPathCallBack (int section, int row);
16- typedef void SectionTableViewScrollToCallBack (
17- int section, int row, bool isScrollDown);
16+ typedef void SectionTableViewScrollToCallBack (int section, int row, bool isScrollDown);
1817
1918class IndexPath {
2019 final int section;
@@ -73,10 +72,8 @@ class SectionTableView extends StatefulWidget {
7372
7473 //tell me cell & header & divider height, so that I can scroll to specific index path
7574 //work with SectionTableController
76- final SectionHeaderHeightCallBack
77- sectionHeaderHeight; // must set when use SectionTableController
78- final DividerHeightCallBack
79- dividerHeight; // must set when use SectionTableController
75+ final SectionHeaderHeightCallBack sectionHeaderHeight; // must set when use SectionTableController
76+ final DividerHeightCallBack dividerHeight; // must set when use SectionTableController
8077 final CellHeightAtIndexPathCallBack
8178 cellHeightAtIndexPath; // must set when use SectionTableController
8279 final SectionTableController
@@ -87,8 +84,7 @@ class SectionTableView extends StatefulWidget {
8784 refreshHeaderBuilder; // custom your own refreshHeader, height = 60.0 is better, other value will result in wrong scroll to indexpath offset
8885 final IndicatorBuilder
8986 refreshFooterBuilder; // custom your own refreshFooter, height = 60.0 is better
90- final Config refreshHeaderConfig,
91- refreshFooterConfig; // configure your refresh header and footer
87+ final Config refreshHeaderConfig, refreshFooterConfig; // configure your refresh header and footer
9288 final bool enablePullUp;
9389 final bool enablePullDown;
9490 final OnRefresh onRefresh;
@@ -130,13 +126,10 @@ class SectionTableView extends StatefulWidget {
130126 failedText: 'Load failed' ,
131127 idleText: 'Pull up to load more' ,
132128 idleIcon: const Icon (Icons .arrow_upward, color: Colors .grey),
133- releaseIcon:
134- const Icon (Icons .arrow_downward, color: Colors .grey),
129+ releaseIcon: const Icon (Icons .arrow_downward, color: Colors .grey),
135130 );
136131 }),
137- assert ((enablePullDown || enablePullUp)
138- ? refreshController != null
139- : true ),
132+ assert ((enablePullDown || enablePullUp) ? refreshController != null : true ),
140133 _scrollController = (enablePullDown || enablePullUp)
141134 ? refreshController.scrollController
142135 : ScrollController (),
@@ -163,8 +156,8 @@ class _SectionTableViewState extends State<SectionTableView> {
163156 if (offset == null ) {
164157 return null ;
165158 }
166- final contentHeight = indexPathToOffsetSearch[
167- IndexPath (section: widget.sectionCount, row: - 1 ).toString ()];
159+ final contentHeight =
160+ indexPathToOffsetSearch[ IndexPath (section: widget.sectionCount, row: - 1 ).toString ()];
168161
169162 if (listViewKey.currentContext != null && contentHeight != null ) {
170163 double listViewHeight = listViewKey.currentContext.size.height;
@@ -228,19 +221,17 @@ class _SectionTableViewState extends State<SectionTableView> {
228221 double dividerHeight = showDivider ? widget.dividerHeight () : 0.0 ;
229222 for (int i = 0 ; i < widget.sectionCount; i++ ) {
230223 if (showSectionHeader) {
231- indexPathToOffsetSearch[IndexPath (section: i, row: - 1 ).toString ()] =
232- offset;
224+ indexPathToOffsetSearch[IndexPath (section: i, row: - 1 ).toString ()] = offset;
233225 offset += widget.sectionHeaderHeight (i);
234226 }
235227 int rows = widget.numOfRowInSection (i);
236228 for (int j = 0 ; j < rows; j++ ) {
237- indexPathToOffsetSearch[IndexPath (section: i, row: j).toString ()] =
238- offset;
229+ indexPathToOffsetSearch[IndexPath (section: i, row: j).toString ()] = offset;
239230 offset += widget.cellHeightAtIndexPath (i, j) + dividerHeight;
240231 }
241232 }
242- indexPathToOffsetSearch[IndexPath (section: widget.sectionCount, row: - 1 )
243- . toString ()] = offset; //list view length
233+ indexPathToOffsetSearch[IndexPath (section: widget.sectionCount, row: - 1 ). toString ()] =
234+ offset; //list view length
244235 }
245236
246237 //calculate initial scroll offset
@@ -250,9 +241,7 @@ class _SectionTableViewState extends State<SectionTableView> {
250241// }
251242
252243 int findValidIndexPathByIndex (int index, int pace) {
253- for (int i = index + pace;
254- (i >= 0 && i < indexToIndexPathSearch.length);
255- i += pace) {
244+ for (int i = index + pace; (i >= 0 && i < indexToIndexPathSearch.length); i += pace) {
256245 final indexPath = indexToIndexPathSearch[i];
257246 if (indexPath.section >= 0 ) {
258247 return i;
@@ -261,6 +250,10 @@ class _SectionTableViewState extends State<SectionTableView> {
261250 return index;
262251 }
263252
253+ if (indexToIndexPathSearch.length == 0 ) {
254+ return ;
255+ }
256+
264257 if (indexPathToOffsetSearch != null ) {
265258 currentIndex = 0 ;
266259 for (int i = 0 ; i < indexToIndexPathSearch.length; i++ ) {
@@ -269,10 +262,9 @@ class _SectionTableViewState extends State<SectionTableView> {
269262 }
270263 }
271264
272- // final preIndexPath = findValidIndexPathByIndex(currentIndex, -1);;
265+ // final preIndexPath = findValidIndexPathByIndex(currentIndex, -1);
273266 final currentIndexPath = indexToIndexPathSearch[currentIndex];
274- final nextIndexPath =
275- indexToIndexPathSearch[findValidIndexPathByIndex (currentIndex, 1 )];
267+ final nextIndexPath = indexToIndexPathSearch[findValidIndexPathByIndex (currentIndex, 1 )];
276268 preIndexOffset = indexPathToOffsetSearch[currentIndexPath.toString ()];
277269 nextIndexOffset = indexPathToOffsetSearch[nextIndexPath.toString ()];
278270 }
@@ -287,8 +279,8 @@ class _SectionTableViewState extends State<SectionTableView> {
287279 return ;
288280 }
289281 if (sectionController.animate) {
290- widget.scrollController. animateTo (offset,
291- duration: Duration (milliseconds: 250 ), curve: Curves .decelerate);
282+ widget.scrollController
283+ . animateTo (offset, duration: Duration (milliseconds: 250 ), curve: Curves .decelerate);
292284 } else {
293285 widget.scrollController.jumpTo (offset);
294286 }
@@ -305,29 +297,27 @@ class _SectionTableViewState extends State<SectionTableView> {
305297 final nextIndexPath = indexToIndexPathSearch[currentIndex];
306298 currentIndex = findValidIndexPathByIndex (currentIndex, - 1 );
307299 final currentIndexPath = indexToIndexPathSearch[currentIndex];
308- preIndexOffset =
309- indexPathToOffsetSearch[currentIndexPath.toString ()];
300+ preIndexOffset = indexPathToOffsetSearch[currentIndexPath.toString ()];
310301 nextIndexOffset = indexPathToOffsetSearch[nextIndexPath.toString ()];
311302// print('go previous index $currentIndexPath');
312303 if (widget.controller.sectionTableViewScrollTo != null ) {
313- widget.controller. sectionTableViewScrollTo (
314- currentIndexPath.section, currentIndexPath.row, false );
304+ widget.controller
305+ . sectionTableViewScrollTo ( currentIndexPath.section, currentIndexPath.row, false );
315306 }
316307 }
317308 } else if (currentOffset >= nextIndexOffset) {
318309 //go next cell
319310 if (currentIndex < indexToIndexPathSearch.length - 2 ) {
320311 currentIndex = findValidIndexPathByIndex (currentIndex, 1 );
321312 final currentIndexPath = indexToIndexPathSearch[currentIndex];
322- final nextIndexPath = indexToIndexPathSearch[
323- findValidIndexPathByIndex (currentIndex, 1 )];
324- preIndexOffset =
325- indexPathToOffsetSearch[currentIndexPath.toString ()];
313+ final nextIndexPath =
314+ indexToIndexPathSearch[findValidIndexPathByIndex (currentIndex, 1 )];
315+ preIndexOffset = indexPathToOffsetSearch[currentIndexPath.toString ()];
326316 nextIndexOffset = indexPathToOffsetSearch[nextIndexPath.toString ()];
327317// print('go next index $currentIndexPath');
328318 if (widget.controller.sectionTableViewScrollTo != null ) {
329- widget.controller. sectionTableViewScrollTo (
330- currentIndexPath.section, currentIndexPath.row, true );
319+ widget.controller
320+ . sectionTableViewScrollTo ( currentIndexPath.section, currentIndexPath.row, true );
331321 }
332322 }
333323 }
@@ -384,8 +374,7 @@ class _SectionTableViewState extends State<SectionTableView> {
384374 }
385375
386376 bool usePullRefresh () {
387- return (widget.enablePullUp || widget.enablePullDown) &&
388- widget.refreshController != null ;
377+ return (widget.enablePullUp || widget.enablePullDown) && widget.refreshController != null ;
389378 }
390379
391380 @override
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