mirror of
https://git.lyx.org/repos/lyx.git
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430 lines
11 KiB
C++
430 lines
11 KiB
C++
/**
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* \file GuiSelectionManager.cpp
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* This file is part of LyX, the document processor.
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* Licence details can be found in the file COPYING.
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*
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* \author Richard Heck
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* \author Et Alia
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*
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* Some of the material in this file previously appeared in
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* GuiCitationDialog.cpp.
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*
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* Full author contact details are available in file CREDITS.
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*/
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#include <config.h>
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#include "GuiSelectionManager.h"
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#include "support/debug.h"
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#include <QAbstractListModel>
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#include <QItemSelection>
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#include <QListView>
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#include <QKeyEvent>
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#include <QPushButton>
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#ifdef KeyPress
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#undef KeyPress
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#endif
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#ifdef ControlModifier
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#undef ControlModifier
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#endif
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#ifdef FocusIn
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#undef FocusIn
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#endif
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namespace lyx {
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namespace frontend {
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GuiSelectionManager::GuiSelectionManager(
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QAbstractItemView * avail,
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QListView * sel,
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QPushButton * add,
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QPushButton * del,
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QPushButton * up,
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QPushButton * down,
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QAbstractListModel * amod,
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QAbstractListModel * smod)
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: availableLV(avail), selectedLV(sel), addPB(add), deletePB(del),
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upPB(up), downPB(down), availableModel(amod), selectedModel(smod),
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selectedHasFocus_(false)
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{
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selectedLV->setModel(smod);
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availableLV->setModel(amod);
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connect(availableLV->selectionModel(),
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SIGNAL(currentChanged(QModelIndex, QModelIndex)),
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this, SLOT(availableChanged(QModelIndex, QModelIndex)));
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connect(selectedLV->selectionModel(),
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SIGNAL(currentChanged(QModelIndex, QModelIndex)),
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this, SLOT(selectedChanged(QModelIndex, QModelIndex)));
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connect(availableLV->selectionModel(),
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SIGNAL(selectionChanged(QItemSelection, QItemSelection)),
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this, SLOT(availableChanged(QItemSelection, QItemSelection)));
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connect(selectedLV->selectionModel(),
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SIGNAL(selectionChanged(QItemSelection, QItemSelection)),
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this, SLOT(selectedChanged(QItemSelection, QItemSelection)));
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connect(addPB, SIGNAL(clicked()),
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this, SLOT(addPB_clicked()));
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connect(deletePB, SIGNAL(clicked()),
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this, SLOT(deletePB_clicked()));
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connect(upPB, SIGNAL(clicked()),
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this, SLOT(upPB_clicked()));
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connect(downPB, SIGNAL(clicked()),
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this, SLOT(downPB_clicked()));
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connect(availableLV, SIGNAL(doubleClicked(QModelIndex)),
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this, SLOT(availableLV_doubleClicked(QModelIndex)));
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availableLV->installEventFilter(this);
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selectedLV->installEventFilter(this);
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}
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void GuiSelectionManager::update()
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{
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updateAddPB();
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updateDelPB();
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updateDownPB();
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updateUpPB();
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}
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QModelIndex GuiSelectionManager::getSelectedIndex() const
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{
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QModelIndexList avail = availableLV->selectionModel()->selectedIndexes();
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QModelIndexList sel = selectedLV->selectionModel()->selectedIndexes();
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bool const have_avl = !avail.isEmpty();
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bool const have_sel = !sel.isEmpty();
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if (selectedFocused()) {
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if (have_sel)
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return sel.front();
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if (have_avl)
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return avail.front();
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}
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else { // available has focus
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if (have_avl)
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return avail.front();
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if (have_sel)
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return sel.front();
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}
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return QModelIndex();
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}
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void GuiSelectionManager::updateAddPB()
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{
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int const arows = availableModel->rowCount();
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QModelIndexList const availSels =
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availableLV->selectionModel()->selectedIndexes();
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addPB->setEnabled(arows > 0 &&
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!availSels.isEmpty() &&
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!isSelected(availSels.first()));
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}
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void GuiSelectionManager::updateDelPB()
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{
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int const srows = selectedModel->rowCount();
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if (srows == 0) {
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deletePB->setEnabled(false);
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return;
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}
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QModelIndexList const selSels =
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selectedLV->selectionModel()->selectedIndexes();
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int const sel_nr = selSels.empty() ? -1 : selSels.first().row();
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deletePB->setEnabled(sel_nr >= 0);
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}
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void GuiSelectionManager::updateUpPB()
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{
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int const srows = selectedModel->rowCount();
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if (srows == 0) {
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upPB->setEnabled(false);
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return;
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}
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QModelIndexList const selSels =
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selectedLV->selectionModel()->selectedIndexes();
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int const sel_nr = selSels.empty() ? -1 : selSels.first().row();
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upPB->setEnabled(sel_nr > 0);
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}
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void GuiSelectionManager::updateDownPB()
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{
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int const srows = selectedModel->rowCount();
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if (srows == 0) {
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downPB->setEnabled(false);
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return;
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}
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QModelIndexList const selSels =
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selectedLV->selectionModel()->selectedIndexes();
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int const sel_nr = selSels.empty() ? -1 : selSels.first().row();
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downPB->setEnabled(sel_nr >= 0 && sel_nr < srows - 1);
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}
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bool GuiSelectionManager::isSelected(const QModelIndex & idx)
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{
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if (selectedModel->rowCount() == 0)
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return false;
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QVariant const & str = availableModel->data(idx, Qt::DisplayRole);
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QModelIndexList qmil =
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selectedModel->match(selectedModel->index(0),
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Qt::DisplayRole, str, 1,
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Qt::MatchFlags(Qt::MatchExactly | Qt::MatchWrap));
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return !qmil.empty();
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}
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void GuiSelectionManager::availableChanged(QItemSelection const & qis, QItemSelection const &)
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{
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QModelIndexList il = qis.indexes();
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if (il.empty())
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return;
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availableChanged(il.front(), QModelIndex());
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}
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void GuiSelectionManager::availableChanged(const QModelIndex & idx, const QModelIndex &)
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{
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if (!idx.isValid())
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return;
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selectedHasFocus_ = false;
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updateHook();
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}
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void GuiSelectionManager::selectedChanged(QItemSelection const & qis, QItemSelection const &)
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{
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QModelIndexList il = qis.indexes();
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if (il.empty())
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return;
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selectedChanged(il.front(), QModelIndex());
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}
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void GuiSelectionManager::selectedChanged(const QModelIndex & idx, const QModelIndex &)
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{
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if (!idx.isValid())
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return;
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selectedHasFocus_ = true;
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updateHook();
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}
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bool GuiSelectionManager::insertRowToSelected(int i,
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QMap<int, QVariant> const & itemData)
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{
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if (i <= -1)
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i = 0;
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if (i > selectedModel->rowCount())
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i = selectedModel->rowCount();
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if (!selectedModel->insertRow(i))
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return false;
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return selectedModel->setItemData(selectedModel->index(i), itemData);
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}
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void GuiSelectionManager::addPB_clicked()
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{
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QModelIndexList selIdx =
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availableLV->selectionModel()->selectedIndexes();
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if (selIdx.isEmpty())
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return;
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QModelIndex const idxToAdd = selIdx.first();
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QModelIndex const idx = selectedLV->currentIndex();
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int const srows = selectedModel->rowCount();
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QMap<int, QVariant> qm = availableModel->itemData(idxToAdd);
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insertRowToSelected(srows, qm);
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selectionChanged(); //signal
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if (idx.isValid())
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selectedLV->setCurrentIndex(idx);
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updateHook();
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}
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void GuiSelectionManager::deletePB_clicked()
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{
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QModelIndexList selIdx =
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selectedLV->selectionModel()->selectedIndexes();
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if (selIdx.isEmpty())
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return;
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QModelIndex idx = selIdx.first();
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selectedModel->removeRow(idx.row());
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selectionChanged(); //signal
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int nrows = selectedLV->model()->rowCount();
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if (idx.row() == nrows) //was last item on list
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idx = idx.sibling(idx.row() - 1, idx.column());
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if (nrows > 1)
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selectedLV->setCurrentIndex(idx);
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else if (nrows == 1)
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selectedLV->setCurrentIndex(selectedLV->model()->index(0, 0));
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selectedHasFocus_ = (nrows > 0);
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updateHook();
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}
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void GuiSelectionManager::upPB_clicked()
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{
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QModelIndexList selIdx =
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selectedLV->selectionModel()->selectedIndexes();
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if (selIdx.isEmpty())
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return;
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QModelIndex idx = selIdx.first();
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int const pos = idx.row();
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if (pos <= 0)
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return;
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QMap<int, QVariant> qm = selectedModel->itemData(idx);
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selectedModel->removeRow(pos);
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insertRowToSelected(pos - 1, qm);
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selectionChanged(); //signal
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selectedLV->setCurrentIndex(idx.sibling(idx.row() - 1, idx.column()));
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selectedHasFocus_ = true;
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updateHook();
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}
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void GuiSelectionManager::downPB_clicked()
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{
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QModelIndexList selIdx =
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selectedLV->selectionModel()->selectedIndexes();
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if (selIdx.isEmpty())
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return;
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QModelIndex idx = selIdx.first();
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int const pos = idx.row();
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if (pos >= selectedModel->rowCount() - 1)
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return;
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QMap<int, QVariant> qm = selectedModel->itemData(idx);
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selectedModel->removeRow(pos);
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insertRowToSelected(pos + 1, qm);
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selectionChanged(); //signal
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selectedLV->setCurrentIndex(idx.sibling(idx.row() + 1, idx.column()));
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selectedHasFocus_ = true;
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updateHook();
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}
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void GuiSelectionManager::availableLV_doubleClicked(const QModelIndex & idx)
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{
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if (isSelected(idx) || !addPB->isEnabled())
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return;
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if (idx.isValid())
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selectedHasFocus_ = false;
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addPB_clicked();
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//updateHook() will be emitted there
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}
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bool GuiSelectionManager::eventFilter(QObject * obj, QEvent * event)
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{
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QEvent::Type etype = event->type();
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if (obj == availableLV) {
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if (etype == QEvent::KeyPress) {
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QKeyEvent * keyEvent = static_cast<QKeyEvent *>(event);
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int const keyPressed = keyEvent->key();
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Qt::KeyboardModifiers const keyModifiers = keyEvent->modifiers();
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// Enter key without modifier will add current item.
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// Ctrl-Enter will add it and close the dialog.
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// This is designed to work both with the main enter key
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// and the one on the numeric keypad.
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if (keyPressed == Qt::Key_Enter || keyPressed == Qt::Key_Return) {
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if (addPB->isEnabled()) {
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if (!keyModifiers) {
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addPB_clicked();
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} else if (keyModifiers == Qt::ControlModifier ||
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keyModifiers == Qt::KeypadModifier ||
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keyModifiers == (Qt::ControlModifier | Qt::KeypadModifier)) {
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addPB_clicked();
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okHook(); //signal
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}
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}
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event->accept();
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return true;
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}
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} else if (etype == QEvent::FocusIn) {
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if (selectedHasFocus_) {
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selectedHasFocus_ = false;
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updateHook();
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}
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event->accept();
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return true;
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}
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} else if (obj == selectedLV) {
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if (etype == QEvent::KeyPress) {
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QKeyEvent * keyEvent = static_cast<QKeyEvent *>(event);
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int const keyPressed = keyEvent->key();
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Qt::KeyboardModifiers const keyModifiers = keyEvent->modifiers();
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// Delete or backspace key will delete current item
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// ...with control modifier will clear the list
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if (keyPressed == Qt::Key_Delete || keyPressed == Qt::Key_Backspace) {
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if (keyModifiers == Qt::NoModifier && deletePB->isEnabled()) {
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deletePB_clicked();
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updateHook();
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} else if (keyModifiers == Qt::ControlModifier) {
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selectedModel->removeRows(0, selectedModel->rowCount());
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updateHook();
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} else
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return QObject::eventFilter(obj, event);
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}
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// Ctrl-Up activates upPB
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else if (keyPressed == Qt::Key_Up) {
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if (keyModifiers == Qt::ControlModifier) {
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if (upPB->isEnabled())
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upPB_clicked();
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event->accept();
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return true;
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}
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}
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// Ctrl-Down activates downPB
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else if (keyPressed == Qt::Key_Down) {
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if (keyModifiers == Qt::ControlModifier) {
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if (downPB->isEnabled())
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downPB_clicked();
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event->accept();
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return true;
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}
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}
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} else if (etype == QEvent::FocusIn) {
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if (!selectedHasFocus_) {
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selectedHasFocus_ = true;
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updateHook();
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}
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event->accept();
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return true;
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}
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}
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return QObject::eventFilter(obj, event);
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}
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} // namespace frontend
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} // namespace lyx
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#include "moc_GuiSelectionManager.cpp"
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