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/*
This file is part of the proxy model test suite.
SPDX-FileCopyrightText: 2009 Stephen Kelly <steveire@gmail.com>
SPDX-License-Identifier: LGPL-2.1-or-later
*/
#include "lessthanwidget.h"
#include <QLabel>
#include <QTreeView>
#include <QVBoxLayout>
ColoredTreeModel::ColoredTreeModel(QObject *parent)
: DynamicTreeModel(parent)
, m_selectionModel(nullptr)
, m_lessThanColour(Qt::yellow)
, m_greaterThanColour(Qt::red)
{
}
void ColoredTreeModel::setSelectionModel(QItemSelectionModel *selectionModel)
{
m_selectionModel = selectionModel;
connect(selectionModel, SIGNAL(selectionChanged(QItemSelection, QItemSelection)), SLOT(recolor()));
}
void ColoredTreeModel::recolor(const QModelIndex &parent)
{
const QModelIndex topLeft = index(0, 0, parent);
const int _rowCount = rowCount(parent);
const QModelIndex bottomRight = index(_rowCount - 1, columnCount(parent) - 1, parent);
Q_EMIT dataChanged(topLeft, bottomRight);
static const int column = 0;
QModelIndex idx;
for (int row = 0; row < _rowCount; ++row) {
idx = index(row, column, parent);
if (hasChildren(idx)) {
recolor(idx);
}
}
}
QVariant ColoredTreeModel::data(const QModelIndex &index, int role) const
{
if (role != Qt::BackgroundRole || !m_selectionModel || m_selectionModel->selection().indexes().size() != 1) {
return DynamicTreeModel::data(index, role);
}
const QModelIndex selectedIndex = m_selectionModel->selection().indexes().first();
if (index == selectedIndex) {
return DynamicTreeModel::data(index, role);
}
if (index < selectedIndex) {
return m_lessThanColour;
}
Q_ASSERT(selectedIndex < index);
return m_greaterThanColour;
}
void LessThanWidget::insertGrid(QList<int> address)
{
ModelInsertCommand *ins = new ModelInsertCommand(m_coloredTreeModel, this);
ins->setAncestorRowNumbers(address);
ins->setNumCols(5);
ins->setStartRow(0);
ins->setEndRow(5);
ins->doCommand();
}
LessThanWidget::LessThanWidget(QWidget *parent, Qt::WindowFlags f)
: QWidget(parent, f)
{
QLabel *explanation = new QLabel(this);
explanation->setText(
QLatin1String("The yellow items are 'less than' the selected item according to QModelIndex::operator<().\n"
"The red items are greater than the selected item (i.e, not less than and not equal)."));
m_coloredTreeModel = new ColoredTreeModel(this);
QTreeView *treeView = new QTreeView(this);
treeView->setModel(m_coloredTreeModel);
treeView->setSelectionBehavior(QAbstractItemView::SelectItems);
treeView->setSelectionMode(QTreeView::SingleSelection);
m_coloredTreeModel->setSelectionModel(treeView->selectionModel());
QVBoxLayout *layout = new QVBoxLayout(this);
layout->addWidget(explanation);
layout->addWidget(treeView);
insertGrid(QList<int>());
insertGrid(QList<int>() << 2);
insertGrid(QList<int>() << 3);
insertGrid(QList<int>() << 4);
insertGrid(QList<int>() << 3 << 2);
insertGrid(QList<int>() << 3 << 3);
insertGrid(QList<int>() << 3 << 4);
}
#include "moc_lessthanwidget.cpp"
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