KoZoomStrategy.cpp

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/* This file is part of the KDE project
 * SPDX-FileCopyrightText: 2006-2007 Thomas Zander <zander@kde.org>
 * SPDX-FileCopyrightText: 2007 C. Boemann <cbo@boemann.dk>
 *
 * SPDX-License-Identifier: LGPL-2.0-or-later
 */
 
#include "KoZoomStrategy.h"
#include "KoShapeRubberSelectStrategy_p.h"
#include "KoZoomTool.h"
#include "KoCanvasBase.h"
#include "KoCanvasController.h"
#include "KoViewConverter.h"
#include "KoViewTransformStillPoint.h"
 
#include <FlakeDebug.h>
 
#include <QTransform>
 
KoZoomStrategy::KoZoomStrategy(KoZoomTool *tool, KoCanvasController *controller, const QPointF &clicked)
        : KoShapeRubberSelectStrategy(tool, clicked, false),
        m_controller(controller),
        m_forceZoomOut(false)
{
}
 
void KoZoomStrategy::finishInteraction(Qt::KeyboardModifiers modifiers)
{
    Q_D(KoShapeRubberSelectStrategy);
 
    const QTransform documentToWidget =
            m_controller->canvas()->viewConverter()->documentToView() *
            m_controller->canvas()->viewConverter()->viewToWidget();
 
    const QRect pixelRect = documentToWidget.mapRect(d->selectedRect()).toRect();
 
    bool m_zoomOut = m_forceZoomOut;
    if (modifiers & Qt::ControlModifier) {
        m_zoomOut = !m_zoomOut;
    }
 
    auto makeStillPoint = [&] () -> KoViewTransformStillPoint {
        const QPointF center = pixelRect.center();
        return m_controller->canvas()->viewConverter()->makeWidgetStillPoint(center);
    };
 
    if (m_zoomOut) {
        m_controller->zoomOut(makeStillPoint());
    } else if (pixelRect.width() > 5 && pixelRect.height() > 5) {
        m_controller->zoomTo(pixelRect);
    } else {
        m_controller->zoomIn(makeStillPoint());
    }
}
 
void KoZoomStrategy::cancelInteraction()
{
    Q_D(KoShapeRubberSelectStrategy);
    d->tool->canvas()->updateCanvas(d->selectedRect().normalized() | d->tool->decorationsRect());
}
 
KoShapeRubberSelectStrategy::SelectionMode KoZoomStrategy::currentMode() const
{
    return CoveringSelection;
}
 
void KoZoomStrategy::forceZoomOut()
{
    m_forceZoomOut = true;
}
 
void KoZoomStrategy::forceZoomIn()
{
    m_forceZoomOut = false;
}