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Code Issues Releases Activity

LP-567 fix performance issue (high CPU) when highlighting items

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we now emit data changes column by column
emitting a dataChanged that spans multiple columns kills performance (CPU shoots up)
this is probably because we configure the sort/filter proxy to be dynamic
this happens when calling setDynamicSortFilter(true) on it which we do
This commit is contained in:
Philippe Renon 2018-03-12 22:03:49 +01:00
parent 4c40d7f620
commit 849f7845a1
2 changed files with 19 additions and 28 deletions
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45
ground/gcs/src/plugins/uavobjectbrowser/uavobjecttreemodel.cpp
View File

@ -280,28 +280,13 @@ QModelIndex UAVObjectTreeModel::index(int row, int column, const QModelIndex &pa
TreeItem *childItem = parentItem->getChild(row);
if (childItem) {
return createIndex(row, column, childItem);
} else {
}
return QModelIndex();
}
}
QModelIndex UAVObjectTreeModel::index(TreeItem *item)
QModelIndex UAVObjectTreeModel::index(TreeItem *item, int column)
{
if (item->parent() == 0) {
return QModelIndex();
}
QModelIndex root = index(item->parent());
for (int i = 0; i < rowCount(root); ++i) {
QModelIndex childIndex = index(i, 0, root);
TreeItem *child = static_cast<TreeItem *>(childIndex.internalPointer());
if (child == item) {
return childIndex;
}
}
Q_ASSERT(false);
return QModelIndex();
return createIndex(item->row(), column, item);
}
QModelIndex UAVObjectTreeModel::parent(const QModelIndex &index) const
@ -464,11 +449,6 @@ void UAVObjectTreeModel::highlightUpdatedObject(UAVObject *obj)
item->setHighlight(true);
}
item->update();
if (!m_onlyHilightChangedValues) {
QModelIndex itemIndex = index(item);
Q_ASSERT(itemIndex != QModelIndex());
emit dataChanged(itemIndex, itemIndex);
}
}
ObjectTreeItem *UAVObjectTreeModel::findObjectTreeItem(UAVObject *object)
@ -503,18 +483,29 @@ MetaObjectTreeItem *UAVObjectTreeModel::findMetaObjectTreeItem(UAVMetaObject *ob
void UAVObjectTreeModel::updateHighlight(TreeItem *item)
{
QModelIndex itemIndex = index(item);
// performance note: here we emit data changes column by column
// emitting a dataChanged that spans multiple columns kills performance (CPU shoots up)
// this is probably because we configure the sort/filter proxy to be dynamic
// this happens when calling setDynamicSortFilter(true) on it which we do
QModelIndex itemIndex;
itemIndex = index(item, TreeItem::TITLE_COLUMN);
Q_ASSERT(itemIndex != QModelIndex());
emit dataChanged(itemIndex, itemIndex.sibling(itemIndex.row(), TreeItem::DATA_COLUMN));
emit dataChanged(itemIndex, itemIndex);
itemIndex = index(item, TreeItem::DATA_COLUMN);
Q_ASSERT(itemIndex != QModelIndex());
emit dataChanged(itemIndex, itemIndex);
}
void UAVObjectTreeModel::updateIsKnown(TreeItem *item)
{
QModelIndex itemIndex = index(item);
QModelIndex itemIndex;
itemIndex = index(item, TreeItem::TITLE_COLUMN);
Q_ASSERT(itemIndex != QModelIndex());
emit dataChanged(itemIndex, itemIndex.sibling(itemIndex.row(), TreeItem::TITLE_COLUMN));
emit dataChanged(itemIndex, itemIndex);
}
void UAVObjectTreeModel::isKnownChanged(UAVObject *object, bool isKnown)

2
ground/gcs/src/plugins/uavobjectbrowser/uavobjecttreemodel.h
View File

@ -100,7 +100,7 @@ private slots:
private:
void setupModelData(UAVObjectManager *objManager);
QModelIndex index(TreeItem *item);
QModelIndex index(TreeItem *item, int column = 0);
void addDataObject(UAVDataObject *obj);
MetaObjectTreeItem *addMetaObject(UAVMetaObject *obj, TreeItem *parent);
void addArrayField(UAVObjectField *field, TreeItem *parent);