KoToolProxy.cpp

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/* This file is part of the KDE project
 * SPDX-FileCopyrightText: 2006-2007 Thomas Zander <zander@kde.org>
 * SPDX-FileCopyrightText: 2006-2011 Boudewijn Rempt <boud@valdyas.org>
 *
 * SPDX-License-Identifier: LGPL-2.0-or-later
 */
#include "KoToolProxy.h"
#include "KoToolProxy_p.h"
 
#include <QMimeData>
#include <QUrl>
#include <QApplication>
#include <QTouchEvent>
#include <QClipboard>
#include <QEvent>
 
#include <kundo2command.h>
#include <KoProperties.h>
 
#include <FlakeDebug.h>
#include <klocalizedstring.h>
 
#include "KoToolBase.h"
#include "KoPointerEvent.h"
#include "KoInputDevice.h"
#include "KoToolManager_p.h"
#include "KoToolSelection.h"
#include "KoCanvasBase.h"
#include "KoCanvasController.h"
#include "KoShapeManager.h"
#include "KoSelection.h"
#include "KoShapeLayer.h"
#include "KoShapeRegistry.h"
#include "KoShapeController.h"
#include "KoViewConverter.h"
#include "KoShapeFactoryBase.h"
#include "kis_assert.h"
#include "kactioncollection.h"
 
 
KoToolProxyPrivate::KoToolProxyPrivate(KoToolProxy *p)
    : parent(p)
{
    scrollTimer.setInterval(100);
}
 
void KoToolProxyPrivate::timeout() // Auto scroll the canvas
{
    Q_ASSERT(controller);
 
    const QPoint originalWidgetPoint = parent->documentToWidget(widgetScrollPointDoc).toPoint();
 
    QRectF mouseArea(widgetScrollPointDoc, QSizeF(10, 10));
    mouseArea.setTopLeft(mouseArea.center());
 
    const QPointF oldPreferredCenter = controller->preferredCenter();
 
    controller->ensureVisibleDoc(mouseArea, true);
 
    const QPointF newPreferredCenter = controller->preferredCenter();
 
    // if scrolling has happened, then just return!
    if (oldPreferredCenter == newPreferredCenter) {
        return;
    }
 
    widgetScrollPointDoc = parent->widgetToDocument(originalWidgetPoint);
 
    QMouseEvent event(QEvent::MouseMove, originalWidgetPoint, Qt::LeftButton, Qt::LeftButton, QFlags<Qt::KeyboardModifier>());
    KoPointerEvent ev(&event, widgetScrollPointDoc);
    activeTool->mouseMoveEvent(&ev);
}
 
void KoToolProxyPrivate::checkAutoScroll(const KoPointerEvent &event)
{
    if (controller == 0) return;
    if (!activeTool) return;
    if (!activeTool->wantsAutoScroll()) return;
    if (!event.isAccepted()) return;
    if (!isToolPressed) return;
    if (event.buttons() != Qt::LeftButton) return;
 
 
    widgetScrollPointDoc = event.point;
 
    if (! scrollTimer.isActive())
        scrollTimer.start();
}
 
void KoToolProxyPrivate::selectionChanged(bool newSelection)
{
    if (hasSelection == newSelection)
        return;
    hasSelection = newSelection;
    Q_EMIT parent->selectionChanged(hasSelection);
}
 
bool KoToolProxyPrivate::isActiveLayerEditable()
{
    if (!activeTool)
        return false;
 
    KoShapeManager * shapeManager = activeTool->canvas()->shapeManager();
    KoShapeLayer * activeLayer = shapeManager->selection()->activeLayer();
    if (activeLayer && !activeLayer->isShapeEditable())
        return false;
    return true;
}
 
KoToolProxy::KoToolProxy(KoCanvasBase *canvas, QObject *parent)
    : QObject(parent),
      d(new KoToolProxyPrivate(this))
{
    KoToolManager::instance()->priv()->registerToolProxy(this, canvas);
 
    connect(&d->scrollTimer, SIGNAL(timeout()), this, SLOT(timeout()));
}
 
KoToolProxy::~KoToolProxy()
{
    delete d;
}
 
void KoToolProxy::paint(QPainter &painter, const KoViewConverter &converter)
{
    if (d->activeTool) d->activeTool->paint(painter, converter);
}
 
void KoToolProxy::repaintDecorations()
{
    if (d->activeTool) d->activeTool->repaintDecorations();
}
 
KoCanvasBase* KoToolProxy::canvas() const
{
    return d->controller->canvas();
}
 
void KoToolProxy::countMultiClick(KoPointerEvent *ev, int eventType)
{
    QPointF globalPoint = ev->globalPos();
 
    if (d->multiClickSource != eventType) {
        d->multiClickCount = 0;
    }
 
    if (d->multiClickGlobalPoint != globalPoint) {
        if (qAbs(globalPoint.x() - d->multiClickGlobalPoint.x()) > 5||
                qAbs(globalPoint.y() - d->multiClickGlobalPoint.y()) > 5) {
            d->multiClickCount = 0;
        }
        d->multiClickGlobalPoint = globalPoint;
    }
 
    if (d->multiClickCount && d->multiClickTimeStamp.elapsed() < QApplication::doubleClickInterval()) {
        // One more multiclick;
        d->multiClickCount++;
    } else {
        d->multiClickTimeStamp.start();
        d->multiClickCount = 1;
        d->multiClickSource = QEvent::Type(eventType);
    }
 
    if (d->activeTool) {
        switch (d->multiClickCount) {
        case 0:
        case 1:
            d->activeTool->mousePressEvent(ev);
            break;
        case 2:
            d->activeTool->mouseDoubleClickEvent(ev);
            break;
        case 3:
        default:
            d->activeTool->mouseTripleClickEvent(ev);
            break;
        }
    } else {
        d->multiClickCount = 0;
        ev->ignore();
    }
 
}
 
void KoToolProxy::tabletEvent(QTabletEvent *event, const QPointF &point)
{
    // We get these events exclusively from KisToolProxy - accept them
    event->accept();
 
    KoInputDevice id(KoInputDevice::convertDeviceType(event),
                     KoInputDevice::convertPointerType(event), event->uniqueId());
    KoToolManager::instance()->priv()->switchInputDevice(id);
 
    KoPointerEvent ev(event, point);
 
    switch (event->type()) {
    case QEvent::TabletPress:
        countMultiClick(&ev, event->type());
        break;
    case QEvent::TabletRelease:
        d->scrollTimer.stop();
        if (d->activeTool)
            d->activeTool->mouseReleaseEvent(&ev);
        break;
    case QEvent::TabletMove:
        if (d->activeTool)
            d->activeTool->mouseMoveEvent(&ev);
        d->checkAutoScroll(ev);
    default:
        ; // ignore the rest.
    }
 
    d->mouseLeaveWorkaround = true;
    d->lastPointerEvent = ev.deepCopyEvent();
}
 
void KoToolProxy::mousePressEvent(KoPointerEvent *ev)
{
    d->mouseLeaveWorkaround = false;
    KoInputDevice id;
    KoToolManager::instance()->priv()->switchInputDevice(id);
    d->mouseDownPoint = ev->pos();
 
 
    // this tries to make sure another mouse press event doesn't happen
    // before a release event happens
    if (d->isToolPressed) {
        mouseReleaseEvent(ev);
        d->scrollTimer.stop();
 
        if (d->activeTool) {
            d->activeTool->mouseReleaseEvent(ev);
        }
 
        d->isToolPressed = false;
 
        return;
    }
 
    countMultiClick(ev, QEvent::MouseButtonPress);
 
    d->isToolPressed = true;
}
 
void KoToolProxy::mousePressEvent(QMouseEvent *event, const QPointF &point)
{
    KoPointerEvent ev(event, point);
    mousePressEvent(&ev);
    d->lastPointerEvent = ev.deepCopyEvent();
}
 
void KoToolProxy::mouseDoubleClickEvent(QMouseEvent *event, const QPointF &point)
{
    KoPointerEvent ev(event, point);
    mouseDoubleClickEvent(&ev);
    d->lastPointerEvent = ev.deepCopyEvent();
}
 
void KoToolProxy::mouseDoubleClickEvent(KoPointerEvent *event)
{
    // let us handle it as any other mousepress (where we then detect multi clicks
    mousePressEvent(event);
}
 
void KoToolProxy::mouseMoveEvent(QMouseEvent *event, const QPointF &point)
{
    KoPointerEvent ev(event, point);
    mouseMoveEvent(&ev);
    d->lastPointerEvent = ev.deepCopyEvent();
}
 
void KoToolProxy::mouseMoveEvent(KoPointerEvent *event)
{
    if (d->mouseLeaveWorkaround) {
        d->mouseLeaveWorkaround = false;
        return;
    }
    KoInputDevice id;
    KoToolManager::instance()->priv()->switchInputDevice(id);
    if (d->activeTool == 0) {
        event->ignore();
        return;
    }
 
    d->activeTool->mouseMoveEvent(event);
 
    d->checkAutoScroll(*event);
}
 
void KoToolProxy::mouseReleaseEvent(QMouseEvent *event, const QPointF &point)
{
    KoPointerEvent ev(event, point);
    mouseReleaseEvent(&ev);
    d->lastPointerEvent = ev.deepCopyEvent();
}
 
void KoToolProxy::mouseReleaseEvent(KoPointerEvent* event)
{
    d->mouseLeaveWorkaround = false;
    KoInputDevice id;
    KoToolManager::instance()->priv()->switchInputDevice(id);
    d->scrollTimer.stop();
 
    if (d->activeTool) {
        d->activeTool->mouseReleaseEvent(event);
    } else {
        event->ignore();
    }
 
    d->isToolPressed = false;
}
 
void KoToolProxy::keyPressEvent(QKeyEvent *event)
{
    if (d->activeTool)
        d->activeTool->keyPressEvent(event);
    else
        event->ignore();
}
 
void KoToolProxy::keyReleaseEvent(QKeyEvent *event)
{
    if (d->activeTool)
        d->activeTool->keyReleaseEvent(event);
    else
        event->ignore();
 
    d->isToolPressed = false;
}
 
void KoToolProxy::explicitUserStrokeEndRequest()
{
    if (d->activeTool) {
        d->activeTool->explicitUserStrokeEndRequest();
    }
}
 
QVariant KoToolProxy::inputMethodQuery(Qt::InputMethodQuery query) const
{
    if (d->activeTool)
        return d->activeTool->inputMethodQuery(query);
    return QVariant();
}
 
void KoToolProxy::inputMethodEvent(QInputMethodEvent *event)
{
    if (d->activeTool) d->activeTool->inputMethodEvent(event);
}
 
void KoToolProxy::focusInEvent(QFocusEvent *event)
{
    if (d->activeTool) d->activeTool->focusInEvent(event);
}
 
void KoToolProxy::focusOutEvent(QFocusEvent *event)
{
    if (d->activeTool) d->activeTool->focusOutEvent(event);
}
 
QMenu *KoToolProxy::popupActionsMenu()
{
    return d->activeTool ? d->activeTool->popupActionsMenu() : 0;
}
 
KisPopupWidgetInterface* KoToolProxy::popupWidget()
{
    return d->activeTool ? d->activeTool->popupWidget() : nullptr;
}
 
void KoToolProxy::setActiveTool(KoToolBase *tool)
{
    if (d->activeTool) {
        disconnect(d->activeTool, SIGNAL(selectionChanged(bool)), this, SLOT(selectionChanged(bool)));
        d->toolPriorityShortcuts.clear();
    }
 
    d->activeTool = tool;
 
    if (tool) {
        KisKActionCollection *collection = d->controller->actionCollection();
        KIS_SAFE_ASSERT_RECOVER_NOOP(collection);
        if (collection) {
            Q_FOREACH(QAction *action, collection->actions()) {
 
                const QVariant prop = action->property("tool_action");
 
                if (prop.isValid()) {
                    const QStringList tools = prop.toStringList();
 
                    if (tools.contains(d->activeTool->toolId())) {
                        const QList<QKeySequence> shortcuts = action->shortcuts();
                        std::copy(shortcuts.begin(), shortcuts.end(),
                                  std::back_inserter(d->toolPriorityShortcuts));
                    }
                }
            }
        }
 
        connect(d->activeTool, SIGNAL(selectionChanged(bool)), this, SLOT(selectionChanged(bool)));
        d->selectionChanged(hasSelection());
        Q_EMIT toolChanged(tool->toolId());
    }
}
 
void KoToolProxy::touchEvent(QTouchEvent* event, const QPointF& point)
{
    // only one "touchpoint" events should be here
    KoPointerEvent ev(event, point);
 
    if (!d->activeTool) return;
 
    switch (event->touchPointStates())
    {
    case Qt::TouchPointPressed:
        countMultiClick(&ev, QEvent::TouchBegin);
        break;
    case Qt::TouchPointMoved:
        d->activeTool->mouseMoveEvent(&ev);
        break;
    case Qt::TouchPointReleased:
        d->activeTool->mouseReleaseEvent(&ev);
        break;
    default: // don't care
        ;
    }
 
    d->lastPointerEvent = ev.deepCopyEvent();
}
 
KoPointerEvent *KoToolProxy::lastDeliveredPointerEvent() const
{
    return d->lastPointerEvent ? &(d->lastPointerEvent->event) : 0;
}
 
QVector<QKeySequence> KoToolProxy::toolPriorityShortcuts() const
{
    return d->toolPriorityShortcuts;
}
 
void KoToolProxyPrivate::setCanvasController(KoCanvasController *c)
{
    controller = c;
}
 
bool KoToolProxy::hasSelection() const
{
    return d->activeTool ? d->activeTool->hasSelection() : false;
}
 
void KoToolProxy::cut()
{
    if (d->activeTool && d->isActiveLayerEditable())
        d->activeTool->cut();
}
 
void KoToolProxy::copy() const
{
    if (d->activeTool)
        d->activeTool->copy();
}
 
bool KoToolProxy::paste()
{
    bool success = false;
 
    if (d->activeTool && d->isActiveLayerEditable()) {
        success = d->activeTool->paste();
    }
 
    return success;
}
 
bool KoToolProxy::selectAll()
{
    bool success = false;
 
    if (d->activeTool && d->isActiveLayerEditable()) {
        success = d->activeTool->selectAll();
    }
 
    return success;
}
 
void KoToolProxy::deselect()
{
    if (d->activeTool)
        d->activeTool->deselect();
}
 
void KoToolProxy::dragMoveEvent(QDragMoveEvent *event, const QPointF &point)
{
    if (d->activeTool)
        d->activeTool->dragMoveEvent(event, point);
}
 
void KoToolProxy::dragLeaveEvent(QDragLeaveEvent *event)
{
    if (d->activeTool)
        d->activeTool->dragLeaveEvent(event);
}
 
void KoToolProxy::dropEvent(QDropEvent *event, const QPointF &point)
{
    if (d->activeTool)
        d->activeTool->dropEvent(event, point);
}
 
void KoToolProxy::deleteSelection()
{
    if (d->activeTool)
        d->activeTool->deleteSelection();
}
 
void KoToolProxy::processEvent(QEvent *e) const
{
    if(e->type()==QEvent::ShortcutOverride
            && d->activeTool
            && d->activeTool->isInTextMode()
            && (static_cast<QKeyEvent*>(e)->modifiers()==Qt::NoModifier ||
                static_cast<QKeyEvent*>(e)->modifiers()==Qt::ShiftModifier
#ifdef Q_OS_WIN
            // we should disallow AltGr shortcuts if a text box is in focus
            || (static_cast<QKeyEvent*>(e)->modifiers()==(Qt::AltModifier | Qt::ControlModifier) &&
                static_cast<QKeyEvent*>(e)->key() < Qt::Key_Escape)
#endif
            )) {
        e->accept();
    }
}
 
void KoToolProxy::requestUndoDuringStroke()
{
    if (d->activeTool) {
        d->activeTool->requestUndoDuringStroke();
    }
}
 
void KoToolProxy::requestRedoDuringStroke()
{
    if (d->activeTool) {
        d->activeTool->requestRedoDuringStroke();
    }
}
 
void KoToolProxy::requestStrokeCancellation()
{
    if (d->activeTool) {
        d->activeTool->requestStrokeCancellation();
    }
}
 
void KoToolProxy::requestStrokeEnd()
{
    if (d->activeTool) {
        d->activeTool->requestStrokeEnd();
    }
}
 
KoToolProxyPrivate *KoToolProxy::priv()
{
    return d;
}
 
//have to include this because of Q_PRIVATE_SLOT
#include "moc_KoToolProxy.cpp"