KisResourceItemView.cpp

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/* This file is part of the KDE project
 * SPDX-FileCopyrightText: 2008 Jan Hambrecht <jaham@gmx.net>
 * SPDX-FileCopyrightText: 2011 José Luis Vergara <pentalis@gmail.com
 *
 * SPDX-License-Identifier: LGPL-2.0-or-later
 */
 
#include "KisResourceItemView.h"
 
#include <QEvent>
#include <QHeaderView>
#include <QScroller>
#include <QHelpEvent>
#include <QDebug>
 
#include <KisKineticScroller.h>
 
#include <QtMath>
 
KisResourceItemView::KisResourceItemView(QWidget *parent)
    : QTableView(parent)
    , m_tip(this)
{
    setSelectionMode(QAbstractItemView::SingleSelection);
    verticalHeader()->hide();
    horizontalHeader()->hide();
    verticalHeader()->setDefaultSectionSize(20);
    setContextMenuPolicy(Qt::DefaultContextMenu);
    setViewMode(FIXED_COLUMNS);
 
    QScroller *scroller = KisKineticScroller::createPreconfiguredScroller(this);
    if (scroller) {
        connect(scroller, SIGNAL(stateChanged(QScroller::State)), this, SLOT(slotScrollerStateChange(QScroller::State)));
    }
 
    connect(this, SIGNAL(clicked(QModelIndex)), SLOT(slotItemClicked(QModelIndex)));
}
 
bool KisResourceItemView::viewportEvent(QEvent *event)
{
    if (!model()) return true;
 
    if (event->type() == QEvent::ToolTip) {
        QHelpEvent *he = static_cast<QHelpEvent *>(event);
#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
        QStyleOptionViewItem option = viewOptions();
#else
        QStyleOptionViewItem option;
        initViewItemOption(&option);
#endif
        QModelIndex index = model()->buddy(indexAt(he->pos()));
        if (index.isValid()) {
            option.rect = visualRect(index);
            m_tip.showTip(he->pos(), option, index);
            return true;
        }
    }
 
    return QTableView::viewportEvent(event);
}
 
void KisResourceItemView::selectionChanged(const QItemSelection &selected, const QItemSelection &/*deselected*/)
{
    if (selected.isEmpty()) {
        Q_EMIT currentResourceChanged(QModelIndex());
    }
    else {
        Q_EMIT currentResourceChanged(selected.indexes().first());
    }
}
 
void KisResourceItemView::mousePressEvent(QMouseEvent *event)
{
    m_beforeClickIndex = currentIndex();
    QTableView::mousePressEvent(event);
}
 
void KisResourceItemView::slotItemClicked(const QModelIndex &index)
{
    if (m_beforeClickIndex == index) {
        Q_EMIT currentResourceClicked(index);
    }
    m_beforeClickIndex = QModelIndex();
}
 
void KisResourceItemView::contextMenuEvent(QContextMenuEvent *event)
{
    QTableView::contextMenuEvent(event);
    Q_EMIT contextMenuRequested(event->globalPos());
}
 
void KisResourceItemView::resizeEvent(QResizeEvent *event)
{
    QTableView::resizeEvent(event);
    updateView();
    Q_EMIT sigSizeChanged();
}
 
void KisResourceItemView::setViewMode(ViewMode mode)
{
    m_viewMode = mode;
 
    switch (m_viewMode) {
    case FIXED_COLUMNS:
        setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff); // Horizontal scrollbar is never needed
        setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOn);
        break;
    case FIXED_ROWS:
        setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOn);
        setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff); // Vertical scrollbar is never needed
        break;
    default:
        setHorizontalScrollBarPolicy(Qt::ScrollBarAsNeeded);
        setVerticalScrollBarPolicy(Qt::ScrollBarAsNeeded);
    }
 
}
 
void KisResourceItemView::updateView()
{
    if (!model()) return;
 
    int columnCount = model()->columnCount(QModelIndex());
    int rowCount = model()->rowCount(QModelIndex());
    int rowHeight, columnWidth;
 
    if (m_viewMode == FIXED_COLUMNS) {
        columnWidth = qFloor(viewport()->size().width() / static_cast<double>(columnCount));
 
        for (int i = 0; i < columnCount; ++i) {
            setColumnWidth(i, columnWidth);
        }
        // keep aspect ratio always square.
        if (columnCount > 1) {
            for (int i = 0; i < rowCount; ++i) {
                setRowHeight(i, columnWidth);
            }
        }
    } else if (m_viewMode == FIXED_ROWS) {
        if (rowCount == 0) return;  // Don't divide by zero
        rowHeight = qFloor(viewport()->size().height() / static_cast<double>(rowCount));
 
        for (int i = 0; i < rowCount; ++i) {
            setRowHeight(i, rowHeight);
        }
    }
}