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Add ability to update a working expansion struct instead of resetting

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* This is mostly useful when using a filtering model so we want to save the
  expansion state of nodes that are temporarily filtered out
This commit is contained in:
baldurk
2021-07-01 15:15:01 +01:00
parent ec5f570fea
commit 94b1dd3923
2 changed files with 37 additions and 12 deletions
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qrenderdoc/Widgets/Extended/RDTreeView.cpp
+15 -8
View File
@@ -505,12 +505,10 @@ void RDTreeView::columnsAboutToBeMoved(const QModelIndex &sourceParent, int sour
m_currentHoverIndex = QModelIndex();
}
void RDTreeView::saveExpansion(RDTreeViewExpansionState &state, const ExpansionKeyGen &keygen)
void RDTreeView::updateExpansion(RDTreeViewExpansionState &state, const ExpansionKeyGen &keygen)
{
state.clear();
for(int i = 0; i < model()->rowCount(); i++)
saveExpansionFromRow(state, model()->index(i, 0), 0, keygen);
updateExpansionFromRow(state, model()->index(i, 0), 0, keygen);
}
void RDTreeView::applyExpansion(const RDTreeViewExpansionState &state, const ExpansionKeyGen &keygen)
@@ -587,12 +585,17 @@ void RDTreeView::copySelection()
clipboard->setText(clipData.trimmed());
}
void RDTreeView::saveExpansionFromRow(RDTreeViewExpansionState &state, QModelIndex idx, uint seed,
const ExpansionKeyGen &keygen)
void RDTreeView::updateExpansionFromRow(RDTreeViewExpansionState &state, QModelIndex idx, uint seed,
const ExpansionKeyGen &keygen)
{
if(!idx.isValid())
return;
int rowcount = model()->rowCount(idx);
if(rowcount == 0)
return;
uint key = keygen(idx, seed);
if(isExpanded(idx))
{
@@ -601,8 +604,12 @@ void RDTreeView::saveExpansionFromRow(RDTreeViewExpansionState &state, QModelInd
// only recurse to children if this one is expanded - forget expansion state under collapsed
// branches. Technically we're losing information here but it allows us to skip a full expensive
// search
for(int i = 0; i < model()->rowCount(idx); i++)
saveExpansionFromRow(state, model()->index(i, 0, idx), seed, keygen);
for(int i = 0; i < rowcount; i++)
updateExpansionFromRow(state, model()->index(i, 0, idx), seed, keygen);
}
else
{
state.remove(key);
}
}
qrenderdoc/Widgets/Extended/RDTreeView.h
+22 -4
View File
@@ -123,13 +123,31 @@ public:
}
void setModel(QAbstractItemModel *model) override;
// state is the storage to save the expansion state into
// state is the storage to save the expansion state into. The state will be preserved but any rows
// which are not processed (either because they don't currently exist in the model or because they
// are below a currently collapsed node) will be preserved. Nodes which are known and collapsed
// will be removed from the set. This can be useful for preserving expansion across filtering that
// may temporarily remove nodes.
// keygen is a function that will take the index of a row and a previous hash, and return the hash
// for that row.
void saveExpansion(RDTreeViewExpansionState &state, const ExpansionKeyGen &keygen);
void updateExpansion(RDTreeViewExpansionState &state, const ExpansionKeyGen &keygen);
// similar to updateExpansion but always starts from a clean slate so no previous data is
// preserved
void saveExpansion(RDTreeViewExpansionState &state, const ExpansionKeyGen &keygen)
{
state.clear();
updateExpansion(state, keygen);
}
void applyExpansion(const RDTreeViewExpansionState &state, const ExpansionKeyGen &keygen);
// convenience overloads for the simple case of using a single column's data as hash
void updateExpansion(RDTreeViewExpansionState &state, int keyColumn, int keyRole = Qt::DisplayRole)
{
updateExpansion(state, [keyColumn, keyRole](QModelIndex idx, uint seed) {
return qHash(idx.sibling(idx.row(), keyColumn).data(keyRole).toString(), seed);
});
}
void saveExpansion(RDTreeViewExpansionState &state, int keyColumn, int keyRole = Qt::DisplayRole)
{
saveExpansion(state, [keyColumn, keyRole](QModelIndex idx, uint seed) {
@@ -198,8 +216,8 @@ private:
QMap<uint, RDTreeViewExpansionState> m_Expansions;
void saveExpansionFromRow(RDTreeViewExpansionState &state, QModelIndex idx, uint seed,
const ExpansionKeyGen &keygen);
void updateExpansionFromRow(RDTreeViewExpansionState &state, QModelIndex idx, uint seed,
const ExpansionKeyGen &keygen);
void applyExpansionToRow(const RDTreeViewExpansionState &state, QModelIndex idx, uint seed,
const ExpansionKeyGen &keygen);