* 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 *
+ * Based on the Itemviews NG project from Trolltech Labs *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
#include "kitemlistselectionmanager.h"
-#include "kitemmodelbase.h"
-#include <KDebug>
-
KItemListSelectionManager::KItemListSelectionManager(QObject* parent) :
QObject(parent),
m_currentItem(-1),
m_anchorItem(-1),
m_selectedItems(),
m_isAnchoredSelectionActive(false),
- m_model(0)
+ m_model(nullptr)
{
}
void KItemListSelectionManager::setCurrentItem(int current)
{
const int previous = m_currentItem;
- const QSet<int> previousSelection = selectedItems();
+ const KItemSet previousSelection = selectedItems();
if (m_model && current >= 0 && current < m_model->count()) {
m_currentItem = current;
emit currentChanged(m_currentItem, previous);
if (m_isAnchoredSelectionActive) {
- const QSet<int> selection = selectedItems();
+ 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 && m_anchorItem != m_currentItem) {
Q_ASSERT(m_anchorItem >= 0);
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_anchorItem != m_currentItem);
}
endAnchoredSelection();
- const QSet<int> previous = selectedItems();
+ const KItemSet previous = selectedItems();
count = qMin(count, m_model->count() - index);
break;
}
- const QSet<int> selection = selectedItems();
+ const KItemSet selection = selectedItems();
if (selection != previous) {
emit selectionChanged(selection, previous);
}
void KItemListSelectionManager::clearSelection()
{
- const QSet<int> previous = selectedItems();
+ const KItemSet previous = selectedItems();
+ if (!previous.isEmpty()) {
+ m_selectedItems.clear();
+ m_isAnchoredSelectionActive = false;
+ emit selectionChanged(KItemSet(), previous);
+ }
+}
+
+void KItemListSelectionManager::replaceSelection(int index, int count)
+{
+ const KItemSet previous = selectedItems();
if (!previous.isEmpty()) {
m_selectedItems.clear();
m_isAnchoredSelectionActive = false;
- emit selectionChanged(QSet<int>(), previous);
}
+ setSelected(index, count);
}
void KItemListSelectionManager::beginAnchoredSelection(int anchor)
void KItemListSelectionManager::itemsInserted(const KItemRangeList& itemRanges)
{
// Store the current selection (needed in the selectionChanged() signal)
- const QSet<int> previousSelection = selectedItems();
+ const KItemSet previousSelection = selectedItems();
// Update the current item
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 += inc;
+ if (m_currentItem >= m_model->count()) {
+ m_currentItem = -1;
+ }
emit currentChanged(m_currentItem, previousCurrent);
}
// Update the selections
if (!m_selectedItems.isEmpty()) {
- const QSet<int> previous = m_selectedItems;
+ const KItemSet previous = m_selectedItems;
m_selectedItems.clear();
- m_selectedItems.reserve(previous.count());
- QSetIterator<int> it(previous);
- while (it.hasNext()) {
- const int index = it.next();
+
+ for (int index: previous) {
int inc = 0;
foreach (const KItemRange& itemRange, itemRanges) {
if (index < itemRange.index) {
}
}
- const QSet<int> selection = selectedItems();
+ 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 QSet<int> previousSelection = selectedItems();
+ const KItemSet previousSelection = selectedItems();
+ const int previousCurrent = m_currentItem;
// Update the current item
- if (m_currentItem >= 0) {
- const int previousCurrent = m_currentItem;
- 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;
- }
- }
- // 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 = currentItem;
+ 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);
+ }
}
// 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 = anchorItem;
+ m_anchorItem = indexAfterRangesRemoving(m_anchorItem, itemRanges, DiscardRemovedIndex);
if (m_anchorItem < 0) {
m_isAnchoredSelectionActive = false;
}
}
- // Update the selections
+ // Update the selections and the anchor item
if (!m_selectedItems.isEmpty()) {
- const QSet<int> previous = m_selectedItems;
+ const KItemSet previous = m_selectedItems;
m_selectedItems.clear();
- m_selectedItems.reserve(previous.count());
- QSetIterator<int> it(previous);
- 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;
- }
- dec += itemRange.count;
- }
- index -= dec;
+ for (int oldIndex : previous) {
+ const int index = indexAfterRangesRemoving(oldIndex, itemRanges, DiscardRemovedIndex);
if (index >= 0) {
m_selectedItems.insert(index);
}
}
}
- const QSet<int> selection = selectedItems();
+ 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 QSet<int> previousSelection = selectedItems();
+ const KItemSet previousSelection = selectedItems();
+
+ // Store whether we were doing an anchored selection
+ const bool wasInAnchoredSelection = isAnchoredSelectionActive();
+
+ // 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) {
emit currentChanged(newCurrentItem, previousCurrentItem);
}
- // Update the anchor item
- if (m_anchorItem >= itemRange.index && m_anchorItem < itemRange.index + itemRange.count) {
- m_anchorItem = movedToIndexes.at(m_anchorItem - itemRange.index);
+ // Start a new anchored selection.
+ if (wasInAnchoredSelection) {
+ beginAnchoredSelection(m_currentItem);
}
// Update the selections
if (!m_selectedItems.isEmpty()) {
- const QSet<int> previous = m_selectedItems;
+ const KItemSet previous = m_selectedItems;
m_selectedItems.clear();
- m_selectedItems.reserve(previous.count());
- QSetIterator<int> it(previous);
- while (it.hasNext()) {
- const int index = it.next();
+
+ for (int index : previous) {
if (index >= itemRange.index && index < itemRange.index + itemRange.count) {
m_selectedItems.insert(movedToIndexes.at(index - itemRange.index));
}
}
}
- const QSet<int> selection = selectedItems();
+ const KItemSet selection = selectedItems();
if (selection != previousSelection) {
emit selectionChanged(selection, previousSelection);
}
}
-#include "kitemlistselectionmanager.moc"
+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;
+
+ 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);
+}
+
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