diff options
Diffstat (limited to 'src/kitemviews/kitemlistselectionmanager.cpp')
| -rw-r--r-- | src/kitemviews/kitemlistselectionmanager.cpp | 186 |
1 files changed, 185 insertions, 1 deletions
diff --git a/src/kitemviews/kitemlistselectionmanager.cpp b/src/kitemviews/kitemlistselectionmanager.cpp index 6fe9ed818..ee8ba929e 100644 --- a/src/kitemviews/kitemlistselectionmanager.cpp +++ b/src/kitemviews/kitemlistselectionmanager.cpp @@ -23,11 +23,13 @@ #include "kitemlistselectionmanager.h" #include "kitemmodelbase.h" +#include <KDebug> KItemListSelectionManager::KItemListSelectionManager(QObject* parent) : QObject(parent), m_currentItem(-1), m_anchorItem(-1), + m_selectedItems(), m_model(0) { } @@ -39,7 +41,7 @@ KItemListSelectionManager::~KItemListSelectionManager() void KItemListSelectionManager::setCurrentItem(int current) { const int previous = m_currentItem; - if (m_model && current < m_model->count()) { + if (m_model && current >= 0 && current < m_model->count()) { m_currentItem = current; } else { m_currentItem = -1; @@ -55,6 +57,88 @@ int KItemListSelectionManager::currentItem() const return m_currentItem; } +void KItemListSelectionManager::setSelectedItems(const QSet<int>& items) +{ + if (m_selectedItems != items) { + const QSet<int> previous = m_selectedItems; + m_selectedItems = items; + emit selectionChanged(m_selectedItems, previous); + } +} + +QSet<int> KItemListSelectionManager::selectedItems() const +{ + return m_selectedItems; +} + +bool KItemListSelectionManager::hasSelection() const +{ + return !m_selectedItems.isEmpty(); +} + +void KItemListSelectionManager::setSelected(int index, int count, SelectionMode mode) +{ + if (index < 0 || count < 1 || !m_model || index >= m_model->count()) { + return; + } + + const QSet<int> previous = m_selectedItems; + + count = qMin(count, m_model->count() - index); + + const int endIndex = index + count -1; + switch (mode) { + case Select: + for (int i = index; i <= endIndex; ++i) { + m_selectedItems.insert(i); + } + break; + + case Deselect: + for (int i = index; i <= endIndex; ++i) { + m_selectedItems.remove(i); + } + break; + + case Toggle: + for (int i = index; i <= endIndex; ++i) { + if (m_selectedItems.contains(i)) { + m_selectedItems.remove(i); + } else { + m_selectedItems.insert(i); + } + } + break; + + default: + Q_ASSERT(false); + break; + } + + if (m_selectedItems != previous) { + emit selectionChanged(m_selectedItems, previous); + } +} + +void KItemListSelectionManager::clearSelection() +{ + if (!m_selectedItems.isEmpty()) { + const QSet<int> previous = m_selectedItems; + m_selectedItems.clear(); + emit selectionChanged(m_selectedItems, previous); + } +} + +void KItemListSelectionManager::beginAnchoredSelection(int anchor, SelectionMode mode) +{ + Q_UNUSED(anchor); + Q_UNUSED(mode); +} + +void KItemListSelectionManager::endAnchoredSelection() +{ +} + void KItemListSelectionManager::setAnchorItem(int anchor) { const int previous = m_anchorItem; @@ -82,6 +166,106 @@ KItemModelBase* KItemListSelectionManager::model() const void KItemListSelectionManager::setModel(KItemModelBase* model) { m_model = model; + if (model && model->count() > 0) { + m_currentItem = 0; + } +} + +void KItemListSelectionManager::itemsInserted(const KItemRangeList& itemRanges) +{ + // Update the current item + if (m_currentItem < 0) { + setCurrentItem(0); + } else { + int inc = 0; + foreach (const KItemRange& itemRange, itemRanges) { + if (m_currentItem < itemRange.index) { + break; + } + inc += itemRange.count; + } + setCurrentItem(m_currentItem + inc); + } + + // 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()) { + const int index = it.next(); + int inc = 0; + foreach (const KItemRange& itemRange, itemRanges) { + if (index < itemRange.index) { + break; + } + inc += itemRange.count; + } + current.insert(index + inc); + } + + if (current != previous) { + m_selectedItems = current; + emit selectionChanged(current, previous); + } + } +} + +void KItemListSelectionManager::itemsRemoved(const KItemRangeList& itemRanges) +{ + // 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; + } + } + setCurrentItem(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; + } + + dec += itemRange.count; + } + index -= dec; + if (index >= 0) { + current.insert(index); + } + } + + if (current != previous) { + m_selectedItems = current; + emit selectionChanged(current, previous); + } + } } #include "kitemlistselectionmanager.moc" |