X-Git-Url: https://cloud.milkyroute.net/gitweb/dolphin.git/blobdiff_plain/3957884bf2e44619a4ed35ba0ffead519988885b..99c48acc8ea5e614e447a8f62d92c8d12e9cf58b:/src/kitemviews/kitemlistselectionmanager.cpp diff --git a/src/kitemviews/kitemlistselectionmanager.cpp b/src/kitemviews/kitemlistselectionmanager.cpp index ee8ba929e..6f7f0e077 100644 --- a/src/kitemviews/kitemlistselectionmanager.cpp +++ b/src/kitemviews/kitemlistselectionmanager.cpp @@ -1,36 +1,21 @@ -/*************************************************************************** - * Copyright (C) 2011 by Peter Penz * - * * - * Based on the Itemviews NG project from Trolltech Labs: * - * http://qt.gitorious.org/qt-labs/itemviews-ng * - * * - * 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 * - * the Free Software Foundation; either version 2 of the License, or * - * (at your option) any later version. * - * * - * This program is distributed in the hope that it will be useful, * - * but WITHOUT ANY WARRANTY; without even the implied warranty of * - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * - * GNU General Public License for more details. * - * * - * You should have received a copy of the GNU General Public License * - * along with this program; if not, write to the * - * Free Software Foundation, Inc., * - * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA * - ***************************************************************************/ +/* + * SPDX-FileCopyrightText: 2011 Peter Penz + * SPDX-FileCopyrightText: 2011 Frank Reininghaus + * + * Based on the Itemviews NG project from Trolltech Labs + * + * SPDX-License-Identifier: GPL-2.0-or-later + */ #include "kitemlistselectionmanager.h" -#include "kitemmodelbase.h" -#include - -KItemListSelectionManager::KItemListSelectionManager(QObject* parent) : - QObject(parent), - m_currentItem(-1), - m_anchorItem(-1), - m_selectedItems(), - m_model(0) +KItemListSelectionManager::KItemListSelectionManager(QObject *parent) + : QObject(parent) + , m_currentItem(-1) + , m_anchorItem(-1) + , m_selectedItems() + , m_isAnchoredSelectionActive(false) + , m_model(nullptr) { } @@ -41,6 +26,8 @@ KItemListSelectionManager::~KItemListSelectionManager() 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 { @@ -48,7 +35,14 @@ void KItemListSelectionManager::setCurrentItem(int current) } if (m_currentItem != previous) { - emit currentChanged(m_currentItem, previous); + Q_EMIT currentChanged(m_currentItem, previous); + + if (m_isAnchoredSelectionActive) { + const KItemSet selection = selectedItems(); + if (selection != previousSelection) { + Q_EMIT selectionChanged(selection, previousSelection); + } + } } } @@ -57,23 +51,56 @@ int KItemListSelectionManager::currentItem() const return m_currentItem; } -void KItemListSelectionManager::setSelectedItems(const QSet& items) +void KItemListSelectionManager::setSelectedItems(const KItemSet &items) { if (m_selectedItems != items) { - const QSet previous = m_selectedItems; + const KItemSet previous = m_selectedItems; m_selectedItems = items; - emit selectionChanged(m_selectedItems, previous); + Q_EMIT selectionChanged(m_selectedItems, previous); + } +} + +KItemSet KItemListSelectionManager::selectedItems() const +{ + KItemSet selectedItems = m_selectedItems; + + 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) { + selectedItems.insert(index); + } } + + return selectedItems; } -QSet KItemListSelectionManager::selectedItems() const +bool KItemListSelectionManager::isSelected(int index) const { - return m_selectedItems; + 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(); + return !m_selectedItems.isEmpty() || (m_isAnchoredSelectionActive && m_anchorItem != m_currentItem); } void KItemListSelectionManager::setSelected(int index, int count, SelectionMode mode) @@ -82,11 +109,12 @@ void KItemListSelectionManager::setSelected(int index, int count, SelectionMode return; } - const QSet previous = m_selectedItems; + endAnchoredSelection(); + const KItemSet previous = selectedItems(); count = qMin(count, m_model->count() - index); - const int endIndex = index + count -1; + const int endIndex = index + count - 1; switch (mode) { case Select: for (int i = index; i <= endIndex; ++i) { @@ -115,55 +143,67 @@ void KItemListSelectionManager::setSelected(int index, int count, SelectionMode break; } - if (m_selectedItems != previous) { - emit selectionChanged(m_selectedItems, previous); + const KItemSet selection = selectedItems(); + if (selection != previous) { + Q_EMIT selectionChanged(selection, previous); } } void KItemListSelectionManager::clearSelection() { - if (!m_selectedItems.isEmpty()) { - const QSet previous = m_selectedItems; + const KItemSet previous = selectedItems(); + if (!previous.isEmpty()) { m_selectedItems.clear(); - emit selectionChanged(m_selectedItems, previous); + m_isAnchoredSelectionActive = false; + Q_EMIT selectionChanged(KItemSet(), previous); } } -void KItemListSelectionManager::beginAnchoredSelection(int anchor, SelectionMode mode) +void KItemListSelectionManager::replaceSelection(int index, int count) { - Q_UNUSED(anchor); - Q_UNUSED(mode); + const KItemSet previous = selectedItems(); + if (!previous.isEmpty()) { + m_selectedItems.clear(); + m_isAnchoredSelectionActive = false; + } + setSelected(index, count); } -void KItemListSelectionManager::endAnchoredSelection() +void KItemListSelectionManager::beginAnchoredSelection(int anchor) { + if (anchor >= 0 && m_model && anchor < m_model->count()) { + m_isAnchoredSelectionActive = true; + m_anchorItem = anchor; + } } -void KItemListSelectionManager::setAnchorItem(int anchor) +void KItemListSelectionManager::endAnchoredSelection() { - 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); + + for (int index = from; index <= to; ++index) { + m_selectedItems.insert(index); + } } - if (m_anchorItem != previous) { - emit anchorChanged(m_anchorItem, previous); - } + m_isAnchoredSelectionActive = false; } -int KItemListSelectionManager::anchorItem() const +bool KItemListSelectionManager::isAnchoredSelectionActive() const { - return m_anchorItem; + return m_isAnchoredSelectionActive; } -KItemModelBase* KItemListSelectionManager::model() const +KItemModelBase *KItemListSelectionManager::model() const { return m_model; } -void KItemListSelectionManager::setModel(KItemModelBase* model) +void KItemListSelectionManager::setModel(KItemModelBase *model) { m_model = model; if (model && model->count() > 0) { @@ -171,101 +211,189 @@ void KItemListSelectionManager::setModel(KItemModelBase* model) } } -void KItemListSelectionManager::itemsInserted(const KItemRangeList& itemRanges) +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) { + for (const KItemRange &itemRange : itemRanges) { if (m_currentItem < itemRange.index) { break; } 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; + if (m_currentItem >= m_model->count()) { + m_currentItem = -1; + } + Q_EMIT currentChanged(m_currentItem, previousCurrent); + } + + // Update the anchor item + if (m_anchorItem < 0) { + m_anchorItem = 0; + } else { + int inc = 0; + for (const KItemRange &itemRange : itemRanges) { + if (m_anchorItem < itemRange.index) { + break; + } + inc += itemRange.count; + } + m_anchorItem += inc; } // Update the selections if (!m_selectedItems.isEmpty()) { - const QSet previous = m_selectedItems; + const KItemSet previous = m_selectedItems; + m_selectedItems.clear(); - QSet current; - current.reserve(m_selectedItems.count()); - QSetIterator it(m_selectedItems); - while (it.hasNext()) { - const int index = it.next(); + for (int index : previous) { int inc = 0; - foreach (const KItemRange& itemRange, itemRanges) { + for (const KItemRange &itemRange : itemRanges) { if (index < itemRange.index) { break; } 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) { + Q_EMIT selectionChanged(selection, previousSelection); } } -void KItemListSelectionManager::itemsRemoved(const KItemRangeList& itemRanges) +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) { + Q_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); + Q_EMIT currentChanged(m_currentItem, -1); + } + } + + // Update the anchor item + if (m_anchorItem >= 0) { + 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(); + + for (int oldIndex : previous) { + const int index = indexAfterRangesRemoving(oldIndex, itemRanges, DiscardRemovedIndex); + if (index >= 0) { + m_selectedItems.insert(index); } } - setCurrentItem(currentItem); + } + + const KItemSet selection = selectedItems(); + if (selection != previousSelection) { + Q_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 &movedToIndexes) +{ + // Store the current selection (needed in the selectionChanged() signal) + 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) { + 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; + Q_EMIT currentChanged(newCurrentItem, previousCurrentItem); + } + + // Start a new anchored selection. + if (wasInAnchoredSelection) { + beginAnchoredSelection(m_currentItem); } // Update the selections if (!m_selectedItems.isEmpty()) { - const QSet previous = m_selectedItems; - - QSet current; - current.reserve(m_selectedItems.count()); - QSetIterator 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; - } - index -= dec; - if (index >= 0) { - current.insert(index); + for (int index : previous) { + if (index >= itemRange.index && index < itemRange.index + itemRange.count) { + m_selectedItems.insert(movedToIndexes.at(index - itemRange.index)); + } else { + m_selectedItems.insert(index); } } + } + + const KItemSet selection = selectedItems(); + if (selection != previousSelection) { + Q_EMIT selectionChanged(selection, previousSelection); + } +} - if (current != previous) { - m_selectedItems = current; - emit selectionChanged(current, previous); +int KItemListSelectionManager::indexAfterRangesRemoving(int index, const KItemRangeList &itemRanges, const RangesRemovingBehaviour behaviour) const +{ + int dec = 0; + for (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); } -#include "kitemlistselectionmanager.moc" +#include "moc_kitemlistselectionmanager.cpp"