/***************************************************************************
* Copyright (C) 2011 by Peter Penz <peter.penz19@gmail.com> *
+ * Copyright (C) 2011 by Frank Reininghaus <frank78ac@googlemail.com> *
* *
* Based on the Itemviews NG project from Trolltech Labs: *
* http://qt.gitorious.org/qt-labs/itemviews-ng *
#include "kitemlistselectionmanager.h"
#include "kitemmodelbase.h"
-#include <KDebug>
KItemListSelectionManager::KItemListSelectionManager(QObject* parent) :
QObject(parent),
m_anchorItem(-1),
m_selectedItems(),
m_isAnchoredSelectionActive(false),
- m_anchoredSelectionMode(KItemListSelectionManager::Select),
m_model(0)
{
}
void KItemListSelectionManager::setCurrentItem(int current)
{
const int previous = m_currentItem;
+ const KItemSet previousSelection = selectedItems();
+
if (m_model && current >= 0 && current < m_model->count()) {
m_currentItem = current;
} else {
if (m_currentItem != previous) {
emit currentChanged(m_currentItem, previous);
+
+ if (m_isAnchoredSelectionActive) {
+ const KItemSet selection = selectedItems();
+ if (selection != previousSelection) {
+ emit selectionChanged(selection, previousSelection);
+ }
+ }
}
}
return m_currentItem;
}
-void KItemListSelectionManager::setSelectedItems(const QSet<int>& items)
+void KItemListSelectionManager::setSelectedItems(const KItemSet& items)
{
if (m_selectedItems != items) {
- const QSet<int> previous = m_selectedItems;
+ const KItemSet previous = m_selectedItems;
m_selectedItems = items;
emit selectionChanged(m_selectedItems, previous);
}
}
-QSet<int> KItemListSelectionManager::selectedItems() const
+KItemSet KItemListSelectionManager::selectedItems() const
{
- QSet<int> selectedItems = m_selectedItems;
+ KItemSet selectedItems = m_selectedItems;
- if (m_isAnchoredSelectionActive) {
+ if (m_isAnchoredSelectionActive && m_anchorItem != m_currentItem) {
+ Q_ASSERT(m_anchorItem >= 0);
+ Q_ASSERT(m_currentItem >= 0);
const int from = qMin(m_anchorItem, m_currentItem);
const int to = qMax(m_anchorItem, m_currentItem);
- for (int index = from; index <= to; index++) {
- switch (m_anchoredSelectionMode) {
- case Select:
- selectedItems.insert(index);
- break;
- case Deselect:
- selectedItems.remove(index);
- break;
- case Toggle:
- if (selectedItems.contains(index)) {
- selectedItems.remove(index);
- } else {
- selectedItems.insert(index);
- }
- break;
- }
+ for (int index = from; index <= to; ++index) {
+ selectedItems.insert(index);
}
}
return selectedItems;
}
+bool KItemListSelectionManager::isSelected(int index) const
+{
+ if (m_selectedItems.contains(index)) {
+ return true;
+ }
+
+ if (m_isAnchoredSelectionActive && m_anchorItem != m_currentItem) {
+ Q_ASSERT(m_anchorItem >= 0);
+ Q_ASSERT(m_currentItem >= 0);
+ const int from = qMin(m_anchorItem, m_currentItem);
+ const int to = qMax(m_anchorItem, m_currentItem);
+
+ if (from <= index && index <= to) {
+ return true;
+ }
+ }
+
+ return false;
+}
+
bool KItemListSelectionManager::hasSelection() const
{
- return !m_selectedItems.isEmpty() || (m_isAnchoredSelectionActive && m_anchoredSelectionMode == KItemListSelectionManager::Select);
+ return !m_selectedItems.isEmpty() || (m_isAnchoredSelectionActive && m_anchorItem != m_currentItem);
}
void KItemListSelectionManager::setSelected(int index, int count, SelectionMode mode)
return;
}
- const QSet<int> previous = m_selectedItems;
+ endAnchoredSelection();
+ const KItemSet previous = selectedItems();
count = qMin(count, m_model->count() - index);
break;
}
- if (m_selectedItems != previous) {
- emit selectionChanged(m_selectedItems, previous);
+ const KItemSet selection = selectedItems();
+ if (selection != previous) {
+ emit selectionChanged(selection, previous);
}
}
void KItemListSelectionManager::clearSelection()
{
- if (!m_selectedItems.isEmpty()) {
- const QSet<int> previous = m_selectedItems;
+ const KItemSet previous = selectedItems();
+ if (!previous.isEmpty()) {
m_selectedItems.clear();
m_isAnchoredSelectionActive = false;
- emit selectionChanged(m_selectedItems, previous);
- }
- else if (m_isAnchoredSelectionActive) {
- m_isAnchoredSelectionActive = false;
- // TODO: the 'previous' parameter of the signal has to be set correctly, but do we actually need it?
- emit selectionChanged(m_selectedItems, m_selectedItems);
+ emit selectionChanged(KItemSet(), previous);
}
}
-void KItemListSelectionManager::beginAnchoredSelection(int anchor, SelectionMode mode)
+void KItemListSelectionManager::beginAnchoredSelection(int anchor)
{
- Q_UNUSED(anchor);
- Q_UNUSED(mode);
+ if (anchor >= 0 && m_model && anchor < m_model->count()) {
+ m_isAnchoredSelectionActive = true;
+ m_anchorItem = anchor;
+ }
}
void KItemListSelectionManager::endAnchoredSelection()
{
-}
-
-void KItemListSelectionManager::setAnchorItem(int anchor)
-{
- const int previous = m_anchorItem;
- if (m_model && anchor < m_model->count()) {
- m_anchorItem = anchor;
- } else {
- m_anchorItem = -1;
- }
+ if (m_isAnchoredSelectionActive && (m_anchorItem != m_currentItem)) {
+ Q_ASSERT(m_anchorItem >= 0);
+ Q_ASSERT(m_currentItem >= 0);
+ const int from = qMin(m_anchorItem, m_currentItem);
+ const int to = qMax(m_anchorItem, m_currentItem);
- if (m_anchorItem != previous) {
- emit anchorChanged(m_anchorItem, previous);
+ for (int index = from; index <= to; ++index) {
+ m_selectedItems.insert(index);
+ }
}
-}
-int KItemListSelectionManager::anchorItem() const
-{
- return m_anchorItem;
+ m_isAnchoredSelectionActive = false;
}
bool KItemListSelectionManager::isAnchoredSelectionActive() const
return m_isAnchoredSelectionActive;
}
-void KItemListSelectionManager::setAnchoredSelectionActive(bool active)
-{
- m_isAnchoredSelectionActive = active;
-}
-
-KItemListSelectionManager::SelectionMode KItemListSelectionManager::anchoredSelectionMode() const
-{
- return m_anchoredSelectionMode;
-}
-
-void KItemListSelectionManager::setAnchoredSelectionMode(KItemListSelectionManager::SelectionMode mode)
-{
- m_anchoredSelectionMode = mode;
-}
-
KItemModelBase* KItemListSelectionManager::model() const
{
return m_model;
void KItemListSelectionManager::itemsInserted(const KItemRangeList& itemRanges)
{
+ // Store the current selection (needed in the selectionChanged() signal)
+ const KItemSet previousSelection = selectedItems();
+
// Update the current item
if (m_currentItem < 0) {
setCurrentItem(0);
} else {
+ const int previousCurrent = m_currentItem;
int inc = 0;
foreach (const KItemRange& itemRange, itemRanges) {
if (m_currentItem < itemRange.index) {
}
inc += itemRange.count;
}
- setCurrentItem(m_currentItem + inc);
+ // Calling setCurrentItem would trigger the selectionChanged signal, but we want to
+ // emit it only once in this function -> change the current item manually and emit currentChanged
+ m_currentItem += inc;
+ emit currentChanged(m_currentItem, previousCurrent);
}
// Update the anchor item
if (m_anchorItem < 0) {
- setAnchorItem(0);
+ m_anchorItem = 0;
} else {
int inc = 0;
foreach (const KItemRange& itemRange, itemRanges) {
}
inc += itemRange.count;
}
- setAnchorItem(m_anchorItem + inc);
+ m_anchorItem += inc;
}
// Update the selections
if (!m_selectedItems.isEmpty()) {
- const QSet<int> previous = m_selectedItems;
+ const KItemSet previous = m_selectedItems;
+ m_selectedItems.clear();
- QSet<int> current;
- current.reserve(m_selectedItems.count());
- QSetIterator<int> it(m_selectedItems);
- while (it.hasNext()) {
- const int index = it.next();
+ foreach (int index, previous) {
int inc = 0;
foreach (const KItemRange& itemRange, itemRanges) {
if (index < itemRange.index) {
}
inc += itemRange.count;
}
- current.insert(index + inc);
+ m_selectedItems.insert(index + inc);
}
+ }
- if (current != previous) {
- m_selectedItems = current;
- emit selectionChanged(current, previous);
- }
+ const KItemSet selection = selectedItems();
+ if (selection != previousSelection) {
+ emit selectionChanged(selection, previousSelection);
}
}
void KItemListSelectionManager::itemsRemoved(const KItemRangeList& itemRanges)
{
+ // Store the current selection (needed in the selectionChanged() signal)
+ const KItemSet previousSelection = selectedItems();
+ const int previousCurrent = m_currentItem;
+
// Update the current item
- if (m_currentItem >= 0) {
- int currentItem = m_currentItem;
- foreach (const KItemRange& itemRange, itemRanges) {
- if (currentItem < itemRange.index) {
- break;
- }
- if (currentItem >= itemRange.index + itemRange.count) {
- currentItem -= itemRange.count;
- } else if (currentItem >= m_model->count()) {
- currentItem = m_model->count() - 1;
- }
+ m_currentItem = indexAfterRangesRemoving(m_currentItem, itemRanges, DiscardRemovedIndex);
+ if (m_currentItem != previousCurrent) {
+ emit currentChanged(m_currentItem, previousCurrent);
+ if (m_currentItem < 0) {
+ // Calling setCurrentItem() would trigger the selectionChanged signal, but we want to
+ // emit it only once in this function -> change the current item manually and emit currentChanged
+ m_currentItem = indexAfterRangesRemoving(previousCurrent, itemRanges, AdjustRemovedIndex);
+ emit currentChanged(m_currentItem, -1);
}
- setCurrentItem(currentItem);
}
// Update the anchor item
if (m_anchorItem >= 0) {
- int anchorItem = m_anchorItem;
- foreach (const KItemRange& itemRange, itemRanges) {
- if (anchorItem < itemRange.index) {
- break;
- }
- if (anchorItem >= itemRange.index + itemRange.count) {
- anchorItem -= itemRange.count;
- } else if (anchorItem >= m_model->count()) {
- anchorItem = m_model->count() - 1;
+ m_anchorItem = indexAfterRangesRemoving(m_anchorItem, itemRanges, DiscardRemovedIndex);
+ if (m_anchorItem < 0) {
+ m_isAnchoredSelectionActive = false;
+ }
+ }
+
+ // Update the selections and the anchor item
+ if (!m_selectedItems.isEmpty()) {
+ const KItemSet previous = m_selectedItems;
+ m_selectedItems.clear();
+
+ foreach (int oldIndex, previous) {
+ const int index = indexAfterRangesRemoving(oldIndex, itemRanges, DiscardRemovedIndex);
+ if (index >= 0) {
+ m_selectedItems.insert(index);
}
}
- setAnchorItem(anchorItem);
}
+ const KItemSet selection = selectedItems();
+ if (selection != previousSelection) {
+ emit selectionChanged(selection, previousSelection);
+ }
+
+ Q_ASSERT(m_currentItem < m_model->count());
+ Q_ASSERT(m_anchorItem < m_model->count());
+}
+
+void KItemListSelectionManager::itemsMoved(const KItemRange& itemRange, const QList<int>& movedToIndexes)
+{
+ // Store the current selection (needed in the selectionChanged() signal)
+ const KItemSet previousSelection = selectedItems();
+
+ // endAnchoredSelection() adds all items between m_currentItem and
+ // m_anchorItem to m_selectedItems. They can then be moved
+ // individually later in this function.
+ endAnchoredSelection();
+
+ // Update the current item
+ if (m_currentItem >= itemRange.index && m_currentItem < itemRange.index + itemRange.count) {
+ const int previousCurrentItem = m_currentItem;
+ const int newCurrentItem = movedToIndexes.at(previousCurrentItem - itemRange.index);
+
+ // Calling setCurrentItem would trigger the selectionChanged signal, but we want to
+ // emit it only once in this function -> change the current item manually and emit currentChanged
+ m_currentItem = newCurrentItem;
+ emit currentChanged(newCurrentItem, previousCurrentItem);
+ }
+
+ // Start a new anchored selection.
+ beginAnchoredSelection(m_currentItem);
+
// Update the selections
if (!m_selectedItems.isEmpty()) {
- const QSet<int> previous = m_selectedItems;
-
- QSet<int> current;
- current.reserve(m_selectedItems.count());
- QSetIterator<int> it(m_selectedItems);
- while (it.hasNext()) {
- int index = it.next();
- int dec = 0;
- foreach (const KItemRange& itemRange, itemRanges) {
- if (index < itemRange.index) {
- break;
- }
-
- if (index < itemRange.index + itemRange.count) {
- // The selection is part of the removed range
- // and will get deleted
- index = -1;
- break;
- }
+ const KItemSet previous = m_selectedItems;
+ m_selectedItems.clear();
- dec += itemRange.count;
+ foreach (int index, previous) {
+ if (index >= itemRange.index && index < itemRange.index + itemRange.count) {
+ m_selectedItems.insert(movedToIndexes.at(index - itemRange.index));
}
- index -= dec;
- if (index >= 0) {
- current.insert(index);
+ else {
+ m_selectedItems.insert(index);
}
}
+ }
+
+ const KItemSet selection = selectedItems();
+ if (selection != previousSelection) {
+ emit selectionChanged(selection, previousSelection);
+ }
+}
+
+int KItemListSelectionManager::indexAfterRangesRemoving(int index, const KItemRangeList& itemRanges,
+ const RangesRemovingBehaviour behaviour) const
+{
+ int dec = 0;
+ foreach (const KItemRange& itemRange, itemRanges) {
+ if (index < itemRange.index) {
+ break;
+ }
+
+ dec += itemRange.count;
- if (current != previous) {
- m_selectedItems = current;
- emit selectionChanged(current, previous);
+ const int firstIndexAfterRange = itemRange.index + itemRange.count;
+ if (index < firstIndexAfterRange) {
+ // The index is part of the removed range
+ if (behaviour == DiscardRemovedIndex) {
+ return -1;
+ } else {
+ // Use the first item after the range as new index
+ index = firstIndexAfterRange;
+ break;
+ }
}
}
+ return qBound(-1, index - dec, m_model->count() - 1);
}
-#include "kitemlistselectionmanager.moc"
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