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Diffstat (limited to 'src/declarative/graphicsitems/qdeclarativelistview.cpp')
-rw-r--r--src/declarative/graphicsitems/qdeclarativelistview.cpp82
1 files changed, 36 insertions, 46 deletions
diff --git a/src/declarative/graphicsitems/qdeclarativelistview.cpp b/src/declarative/graphicsitems/qdeclarativelistview.cpp
index 6fd3b71..38a4839 100644
--- a/src/declarative/graphicsitems/qdeclarativelistview.cpp
+++ b/src/declarative/graphicsitems/qdeclarativelistview.cpp
@@ -182,7 +182,8 @@ public:
, bufferMode(BufferBefore | BufferAfter)
, ownModel(false), wrap(false), autoHighlight(true), haveHighlightRange(false)
, correctFlick(false), inFlickCorrection(false), lazyRelease(false)
- , deferredRelease(false), layoutScheduled(false), minExtentDirty(true), maxExtentDirty(true)
+ , deferredRelease(false), layoutScheduled(false), currentIndexCleared(false)
+ , minExtentDirty(true), maxExtentDirty(true)
{}
void init();
@@ -393,44 +394,19 @@ public:
}
// map a model index to visibleItems index.
- // These may differ if removed items are still present in the visible list,
- // e.g. doing a removal animation
int mapFromModel(int modelIndex) const {
if (modelIndex < visibleIndex || modelIndex >= visibleIndex + visibleItems.count())
return -1;
for (int i = 0; i < visibleItems.count(); ++i) {
FxListItem *listItem = visibleItems.at(i);
if (listItem->index == modelIndex)
- return i + visibleIndex;
+ return i;
if (listItem->index > modelIndex)
return -1;
}
return -1; // Not in visibleList
}
- bool mapRangeFromModel(int &index, int &count) const {
- if (index + count < visibleIndex)
- return false;
-
- int lastIndex = -1;
- for (int i = visibleItems.count()-1; i >= 0; --i) {
- FxListItem *listItem = visibleItems.at(i);
- if (listItem->index != -1) {
- lastIndex = listItem->index;
- break;
- }
- }
-
- if (index > lastIndex)
- return false;
-
- int last = qMin(index + count - 1, lastIndex);
- index = qMax(index, visibleIndex);
- count = last - index + 1;
-
- return true;
- }
-
void updateViewport() {
Q_Q(QDeclarativeListView);
if (orient == QDeclarativeListView::Vertical) {
@@ -544,6 +520,7 @@ public:
bool lazyRelease : 1;
bool deferredRelease : 1;
bool layoutScheduled : 1;
+ bool currentIndexCleared : 1;
mutable bool minExtentDirty : 1;
mutable bool maxExtentDirty : 1;
};
@@ -881,6 +858,7 @@ void QDeclarativeListViewPrivate::createHighlight()
} else {
highlight->item->setWidth(currentItem->item->width());
}
+ highlight->setPosition(currentItem->itemPosition());
}
QDeclarativeItemPrivate *itemPrivate = static_cast<QDeclarativeItemPrivate*>(QGraphicsItemPrivate::get(item));
itemPrivate->addItemChangeListener(this, QDeclarativeItemPrivate::Geometry);
@@ -1045,8 +1023,11 @@ void QDeclarativeListViewPrivate::updateCurrent(int modelIndex)
currentItem->attached->setIsCurrentItem(false);
releaseItem(currentItem);
currentItem = 0;
- currentIndex = -1;
+ currentIndex = modelIndex;
+ emit q->currentIndexChanged();
updateHighlight();
+ } else if (currentIndex != modelIndex) {
+ currentIndex = modelIndex;
emit q->currentIndexChanged();
}
return;
@@ -1567,7 +1548,7 @@ void QDeclarativeListView::setModel(const QVariant &model)
disconnect(d->model, SIGNAL(itemsMoved(int,int,int)), this, SLOT(itemsMoved(int,int,int)));
disconnect(d->model, SIGNAL(itemsChanged(int,int)), this, SLOT(itemsChanged(int,int)));
disconnect(d->model, SIGNAL(modelReset()), this, SLOT(modelReset()));
- disconnect(d->model, SIGNAL(createdItem(int, QDeclarativeItem*)), this, SLOT(createdItem(int,QDeclarativeItem*)));
+ disconnect(d->model, SIGNAL(createdItem(int,QDeclarativeItem*)), this, SLOT(createdItem(int,QDeclarativeItem*)));
disconnect(d->model, SIGNAL(destroyingItem(QDeclarativeItem*)), this, SLOT(destroyingItem(QDeclarativeItem*)));
}
d->clear();
@@ -1598,7 +1579,7 @@ void QDeclarativeListView::setModel(const QVariant &model)
if (isComponentComplete()) {
updateSections();
refill();
- if (d->currentIndex >= d->model->count() || d->currentIndex < 0) {
+ if ((d->currentIndex >= d->model->count() || d->currentIndex < 0) && !d->currentIndexCleared) {
setCurrentIndex(0);
} else {
d->moveReason = QDeclarativeListViewPrivate::SetIndex;
@@ -1614,7 +1595,7 @@ void QDeclarativeListView::setModel(const QVariant &model)
connect(d->model, SIGNAL(itemsMoved(int,int,int)), this, SLOT(itemsMoved(int,int,int)));
connect(d->model, SIGNAL(itemsChanged(int,int)), this, SLOT(itemsChanged(int,int)));
connect(d->model, SIGNAL(modelReset()), this, SLOT(modelReset()));
- connect(d->model, SIGNAL(createdItem(int, QDeclarativeItem*)), this, SLOT(createdItem(int,QDeclarativeItem*)));
+ connect(d->model, SIGNAL(createdItem(int,QDeclarativeItem*)), this, SLOT(createdItem(int,QDeclarativeItem*)));
connect(d->model, SIGNAL(destroyingItem(QDeclarativeItem*)), this, SLOT(destroyingItem(QDeclarativeItem*)));
emit countChanged();
}
@@ -1688,7 +1669,8 @@ void QDeclarativeListView::setDelegate(QDeclarativeComponent *delegate)
\qmlproperty Item ListView::currentItem
The \c currentIndex property holds the index of the current item, and
- \c currentItem holds the current item.
+ \c currentItem holds the current item. Setting the currentIndex to -1
+ will clear the highlight and set currentItem to null.
If highlightFollowsCurrentItem is \c true, setting either of these
properties will smoothly scroll the ListView so that the current
@@ -1708,10 +1690,13 @@ void QDeclarativeListView::setCurrentIndex(int index)
Q_D(QDeclarativeListView);
if (d->requestedIndex >= 0) // currently creating item
return;
- if (isComponentComplete() && d->isValid() && index != d->currentIndex && index < d->model->count() && index >= 0) {
+ d->currentIndexCleared = (index == -1);
+ if (index == d->currentIndex)
+ return;
+ if (isComponentComplete() && d->isValid()) {
d->moveReason = QDeclarativeListViewPrivate::SetIndex;
d->updateCurrent(index);
- } else if (index != d->currentIndex) {
+ } else {
d->currentIndex = index;
emit currentIndexChanged();
}
@@ -2320,6 +2305,8 @@ void QDeclarativeListView::viewportMoved()
{
Q_D(QDeclarativeListView);
QDeclarativeFlickable::viewportMoved();
+ if (!d->itemCount)
+ return;
d->lazyRelease = true;
refill();
if (d->flickingHorizontally || d->flickingVertically || d->movingHorizontally || d->movingVertically)
@@ -2523,16 +2510,18 @@ void QDeclarativeListView::geometryChanged(const QRectF &newGeometry,
Increments the current index. The current index will wrap
if keyNavigationWraps is true and it is currently at the end.
+ This method has no effect if the \l count is zero.
\bold Note: methods should only be called after the Component has completed.
*/
void QDeclarativeListView::incrementCurrentIndex()
{
Q_D(QDeclarativeListView);
- if (currentIndex() < d->model->count() - 1 || d->wrap) {
+ int count = d->model ? d->model->count() : 0;
+ if (count && (currentIndex() < count - 1 || d->wrap)) {
d->moveReason = QDeclarativeListViewPrivate::SetIndex;
int index = currentIndex()+1;
- d->updateCurrent(index < d->model->count() ? index : 0);
+ setCurrentIndex((index >= 0 && index < count) ? index : 0);
}
}
@@ -2541,16 +2530,18 @@ void QDeclarativeListView::incrementCurrentIndex()
Decrements the current index. The current index will wrap
if keyNavigationWraps is true and it is currently at the beginning.
+ This method has no effect if the \l count is zero.
\bold Note: methods should only be called after the Component has completed.
*/
void QDeclarativeListView::decrementCurrentIndex()
{
Q_D(QDeclarativeListView);
- if (currentIndex() > 0 || d->wrap) {
+ int count = d->model ? d->model->count() : 0;
+ if (count && (currentIndex() > 0 || d->wrap)) {
d->moveReason = QDeclarativeListViewPrivate::SetIndex;
int index = currentIndex()-1;
- d->updateCurrent(index >= 0 ? index : d->model->count()-1);
+ setCurrentIndex((index >= 0 && index < count) ? index : count-1);
}
}
@@ -2684,7 +2675,7 @@ void QDeclarativeListView::componentComplete()
if (d->isValid()) {
refill();
d->moveReason = QDeclarativeListViewPrivate::SetIndex;
- if (d->currentIndex < 0)
+ if (d->currentIndex < 0 && !d->currentIndexCleared)
d->updateCurrent(0);
else
d->updateCurrent(d->currentIndex);
@@ -2784,13 +2775,13 @@ void QDeclarativeListView::itemsInserted(int modelIndex, int count)
d->moveReason = QDeclarativeListViewPrivate::Other;
if (!d->visibleItems.count() || d->model->count() <= 1) {
d->scheduleLayout();
- if (d->currentIndex >= modelIndex) {
+ if (d->itemCount && d->currentIndex >= modelIndex) {
// adjust current item index
d->currentIndex += count;
if (d->currentItem)
d->currentItem->index = d->currentIndex;
emit currentIndexChanged();
- } else if (d->currentIndex < 0) {
+ } else if (!d->currentIndex || (d->currentIndex < 0 && !d->currentIndexCleared)) {
d->updateCurrent(0);
}
d->itemCount += count;
@@ -2798,15 +2789,15 @@ void QDeclarativeListView::itemsInserted(int modelIndex, int count)
return;
}
- int overlapCount = count;
- if (!d->mapRangeFromModel(modelIndex, overlapCount)) {
+ int index = d->mapFromModel(modelIndex);
+ if (index < 0) {
int i = d->visibleItems.count() - 1;
while (i > 0 && d->visibleItems.at(i)->index == -1)
--i;
if (d->visibleItems.at(i)->index + 1 == modelIndex
&& d->visibleItems.at(i)->endPosition() < d->buffer+d->position()+d->size()-1) {
// Special case of appending an item to the model.
- modelIndex = d->visibleIndex + d->visibleItems.count();
+ index = d->visibleItems.count();
} else {
if (modelIndex < d->visibleIndex) {
// Insert before visible items
@@ -2833,7 +2824,6 @@ void QDeclarativeListView::itemsInserted(int modelIndex, int count)
// At least some of the added items will be visible
- int index = modelIndex - d->visibleIndex;
// index can be the next item past the end of the visible items list (i.e. appended)
int pos = index < d->visibleItems.count() ? d->visibleItems.at(index)->position()
: d->visibleItems.at(index-1)->endPosition()+d->spacing+1;
@@ -2897,7 +2887,7 @@ void QDeclarativeListView::itemsInserted(int modelIndex, int count)
}
diff = pos - initialPos;
}
- if (d->currentIndex >= modelIndex) {
+ if (d->itemCount && d->currentIndex >= modelIndex) {
// adjust current item index
d->currentIndex += count;
if (d->currentItem) {
generated by cgit v0.12 at 2024-09-19 19:51:28 (GMT)