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8193800: TreeTableView selection changes on sorting 
Reviewed-by: kcr, aghaisas
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@arapte
arapte committed Jun 29, 2020
1 parent a5878e0 commit 2ca509a1587c70ad2d9b3035b298153a5c906c8b
Showing 3 changed files with 336 additions and 88 deletions.
10 modules/javafx.controls/src/main/java/javafx/scene/control/TreeTablePosition.java
View file
@@ -77,6 +77,16 @@ public TreeTablePosition(@NamedArg("treeTableView") TreeTableView<S> treeTableVi
nonFixedColumnIndex = treeTableView == null || tableColumn == null ? -1 : treeTableView.getVisibleLeafIndex(tableColumn);
}

// Not public API. A Copy-like constructor with a different row.
// It is used for updating the selection when the TreeItems are
// sorted using TreeTableView.sort() or reordered using setAll().
TreeTablePosition(@NamedArg("treeTableView") TreeTablePosition<S, T> pos, @NamedArg("row") int row) {
super(row, pos.getTableColumn());
this.controlRef = new WeakReference<>(pos.getTreeTableView());
this.treeItemRef = new WeakReference<>(pos.getTreeItem());
nonFixedColumnIndex = pos.getColumn();
}



/***************************************************************************
178 modules/javafx.controls/src/main/java/javafx/scene/control/TreeTableView.java
View file
@@ -56,6 +56,7 @@
import java.util.Collections;
import java.util.Comparator;
import java.util.HashMap;
import java.util.HashSet;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Map;
@@ -1804,6 +1805,11 @@ public TreeTableColumn<S,?> getVisibleLeafColumn(int column) {
return visibleLeafColumns.get(column);
}

private boolean sortingInProgress;
boolean isSortingInProgress() {
return sortingInProgress;
}

/**
* The sort method forces the TreeTableView to re-run its sorting algorithm. More
* often than not it is not necessary to call this method directly, as it is
@@ -1814,6 +1820,7 @@ public TreeTableColumn<S,?> getVisibleLeafColumn(int column) {
* something external changes and a sort is required.
*/
public void sort() {
sortingInProgress = true;
final ObservableList<TreeTableColumn<S,?>> sortOrder = getSortOrder();

// update the Comparator property
@@ -1832,6 +1839,7 @@ public void sort() {
// sortLock = true;
// TableUtil.handleSortFailure(sortOrder, lastSortEventType, lastSortEventSupportInfo);
// sortLock = false;
sortingInProgress = false;
return;
}

@@ -1845,9 +1853,27 @@ public void sort() {

// get the sort policy and run it
Callback<TreeTableView<S>, Boolean> sortPolicy = getSortPolicy();
if (sortPolicy == null) return;
if (sortPolicy == null) {
sortingInProgress = false;
return;
}
Boolean success = sortPolicy.call(this);

if (getSortMode() == TreeSortMode.ALL_DESCENDANTS) {
Set<TreeItem<S>> sortedParents = new HashSet<>();
for (TreeTablePosition<S,?> selectedPosition : prevState) {
// This null check is not required ideally.
// The selectedPosition.getTreeItem() should always return a valid TreeItem.
// But, it is possible to be null due to JDK-8248217.
if (selectedPosition.getTreeItem() != null) {
TreeItem<S> parent = selectedPosition.getTreeItem().getParent();
while (parent != null && sortedParents.add(parent)) {
parent.getChildren();
parent = parent.getParent();
}
}
}
}
getSelectionModel().stopAtomic();

if (success == null || ! success) {
@@ -1872,7 +1898,6 @@ public void sort() {
removed.add(prevItem);
}
}

if (!removed.isEmpty()) {
// the sort operation effectively permutates the selectedCells list,
// but we cannot fire a permutation event as we are talking about
@@ -1883,7 +1908,10 @@ public void sort() {
sm.fireCustomSelectedCellsListChangeEvent(c);
}
}
getSelectionModel().setSelectedIndex(getRow(getSelectionModel().getSelectedItem()));
getFocusModel().focus(getSelectionModel().getSelectedIndex());
}
sortingInProgress = false;
}

/**
@@ -2540,68 +2568,40 @@ private void updateTreeEventListener(TreeItem<S> oldRoot, TreeItem<S> newRoot) {
shift += -count + 1;
startRow++;
} else if (e.wasPermutated()) {
// General approach:
// -- detected a sort has happened
// -- Create a permutation lookup map (1)
// -- dump all the selected indices into a list (2)
// -- create a list containing the new indices (3)
// -- for each previously-selected index (4)
// -- if index is in the permutation lookup map
// -- add the new index to the new indices list
// -- Perform batch selection (5)

startAtomic();

final int offset = startRow + 1;

// (1)
int length = e.getTo() - e.getFrom();
HashMap<Integer, Integer> pMap = new HashMap<> (length);
for (int i = e.getFrom(); i < e.getTo(); i++) {
pMap.put(i, e.getChange().getPermutation(i));
}

// (2)
List<TreeTablePosition<S,?>> selectedIndices = new ArrayList<>(getSelectedCells());

// (3)
List<TreeTablePosition<S,?>> newIndices = new ArrayList<>(selectedIndices.size());
// Approach:
// Get the current selection.
// Create a new selection with updated index(row).
// Update the current selection with new selection.
// If sorting is in progress then one Selection change event will be sent from
// TreeTableView.sort() method, and should not be sent from here.
// else, in case otherwise, the selection change events would be generated.
// Do not call shiftSelection() in case of permutation change(when shift == 0).

List<TreeTablePosition<S, ?>> currentSelection = new ArrayList<>(selectedCellsMap.getSelectedCells());
List<TreeTablePosition<S, ?>> updatedSelection = new ArrayList<>();

// (4)
boolean selectionIndicesChanged = false;
for (int i = 0; i < selectedIndices.size(); i++) {
final TreeTablePosition<S,?> oldIndex = selectedIndices.get(i);
final int oldRow = oldIndex.getRow() - offset;

if (pMap.containsKey(oldRow)) {
int newIndex = pMap.get(oldRow) + offset;

selectionIndicesChanged = selectionIndicesChanged || newIndex != oldRow;

newIndices.add(new TreeTablePosition<>(oldIndex.getTreeTableView(), newIndex, oldIndex.getTableColumn()));
}

// check if the root element of this event was selected, so that we can retain it
if (oldIndex.getRow() == startRow) {
newIndices.add(new TreeTablePosition<>(oldIndex.getTreeTableView(), oldIndex.getRow(), oldIndex.getTableColumn()));
for (TreeTablePosition<S, ?> selectedCell : currentSelection) {
int newRow = treeTableView.getRow(selectedCell.getTreeItem());
if (selectedCell.getRow() != newRow) {
selectionIndicesChanged = true;
}
updatedSelection.add(new TreeTablePosition<>(selectedCell, newRow));
}

if (selectionIndicesChanged) {
// (5)
quietClearSelection();
stopAtomic();

selectedCellsMap.setAll(newIndices);

final int offsetOldIndex = oldSelectedIndex - offset;
if (offsetOldIndex >= 0 && offsetOldIndex < getItemCount()) {
int newIndex = e.getChange().getPermutation(offsetOldIndex);
setSelectedIndex(newIndex + offset);
focus(newIndex + offset);
if (treeTableView.isSortingInProgress()) {
startAtomic();
selectedCellsMap.setAll(updatedSelection);
stopAtomic();
} else {
startAtomic();
quietClearSelection();
stopAtomic();
selectedCellsMap.setAll(updatedSelection);
int selectedIndex = treeTableView.getRow(getSelectedItem());
setSelectedIndex(selectedIndex);
focus(selectedIndex);
}
} else {
stopAtomic();
}
} else if (e.wasAdded()) {
// shuffle selection by the number of added items
@@ -2663,42 +2663,44 @@ private void updateTreeEventListener(TreeItem<S> oldRoot, TreeItem<S> newRoot) {
}
} while (e.getChange() != null && e.getChange().next());

shiftSelection(startRow, shift, new Callback<ShiftParams, Void>() {
@Override public Void call(ShiftParams param) {

// we make the shifts atomic, as otherwise listeners to
// the items / indices lists get a lot of intermediate
// noise. They eventually get the summary event fired
// from within shiftSelection, so this is ok.
startAtomic();

final int clearIndex = param.getClearIndex();
final int setIndex = param.getSetIndex();
TreeTablePosition<S,?> oldTP = null;
if (clearIndex > -1) {
for (int i = 0; i < selectedCellsMap.size(); i++) {
TreeTablePosition<S,?> tp = selectedCellsMap.get(i);
if (tp.getRow() == clearIndex) {
oldTP = tp;
selectedCellsMap.remove(tp);
} else if (tp.getRow() == setIndex && !param.isSelected()) {
selectedCellsMap.remove(tp);
if (shift != 0) {
shiftSelection(startRow, shift, new Callback<ShiftParams, Void>() {
@Override public Void call(ShiftParams param) {

// we make the shifts atomic, as otherwise listeners to
// the items / indices lists get a lot of intermediate
// noise. They eventually get the summary event fired
// from within shiftSelection, so this is ok.
startAtomic();

final int clearIndex = param.getClearIndex();
final int setIndex = param.getSetIndex();
TreeTablePosition<S,?> oldTP = null;
if (clearIndex > -1) {
for (int i = 0; i < selectedCellsMap.size(); i++) {
TreeTablePosition<S,?> tp = selectedCellsMap.get(i);
if (tp.getRow() == clearIndex) {
oldTP = tp;
selectedCellsMap.remove(tp);
} else if (tp.getRow() == setIndex && !param.isSelected()) {
selectedCellsMap.remove(tp);
}
}
}
}

if (oldTP != null && param.isSelected()) {
TreeTablePosition<S,?> newTP = new TreeTablePosition<>(
treeTableView, param.getSetIndex(), oldTP.getTableColumn());
if (oldTP != null && param.isSelected()) {
TreeTablePosition<S,?> newTP = new TreeTablePosition<>(
treeTableView, param.getSetIndex(), oldTP.getTableColumn());

selectedCellsMap.add(newTP);
}
selectedCellsMap.add(newTP);
}

stopAtomic();
stopAtomic();

return null;
}
});
return null;
}
});
}
}
};

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