File indexing completed on 2024-05-12 15:56:53

 /* 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 <QTimer>
 #include <QApplication>
 #include <QTouchEvent>
 #include <QClipboard>
 
 #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"
 
 
 KoToolProxyPrivate::KoToolProxyPrivate(KoToolProxy *p)
     : parent(p)
 {
     scrollTimer.setInterval(100);
 }
 
 void KoToolProxyPrivate::timeout() // Auto scroll the canvas
 {
     Q_ASSERT(controller);
 
     QPoint offset = QPoint(controller->canvasOffsetX(), controller->canvasOffsetY());
     QPoint origin = controller->canvas()->documentOrigin();
     QPoint viewPoint = widgetScrollPoint - origin - offset;
 
     QRectF mouseArea(viewPoint, QSizeF(10, 10));
     mouseArea.setTopLeft(mouseArea.center());
 
     controller->ensureVisible(mouseArea, true);
 
     QPoint newOffset = QPoint(controller->canvasOffsetX(), controller->canvasOffsetY());
 
     QPoint moved = offset - newOffset;
     if (moved.isNull())
         return;
 
     widgetScrollPoint += moved;
 
     QPointF documentPoint = parent->widgetToDocument(widgetScrollPoint);
     QMouseEvent event(QEvent::MouseMove, widgetScrollPoint, Qt::LeftButton, Qt::LeftButton, QFlags<Qt::KeyboardModifier>());
     KoPointerEvent ev(&event, documentPoint);
     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;
 
 
     widgetScrollPoint = event.pos();
 
     if (! scrollTimer.isActive())
         scrollTimer.start();
 }
 
 void KoToolProxyPrivate::selectionChanged(bool newSelection)
 {
     if (hasSelection == newSelection)
         return;
     hasSelection = newSelection;
     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();
 }
 
 
 QPointF KoToolProxy::widgetToDocument(const QPointF &widgetPoint) const
 {
     QPoint offset = QPoint(d->controller->canvasOffsetX(), d->controller->canvasOffsetY());
     QPoint origin = d->controller->canvas()->documentOrigin();
     QPointF viewPoint = widgetPoint.toPoint() - QPointF(origin - offset);
 
     return d->controller->canvas()->viewConverter()->viewToDocument(viewPoint);
 }
 
 KoCanvasBase* KoToolProxy::canvas() const
 {
     return d->controller->canvas();
 }
 
 void KoToolProxy::tabletEvent(QTabletEvent *event, const QPointF &point)
 {
     // We get these events exclusively from KisToolProxy - accept them
     event->accept();
 
     KoInputDevice id(event->device(), event->pointerType(), event->uniqueId());
     KoToolManager::instance()->priv()->switchInputDevice(id);
 
     KoPointerEvent ev(event, point);
     switch (event->type()) {
     case QEvent::TabletPress:
         if (d->activeTool)
             d->activeTool->mousePressEvent(&ev);
         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;
     }
 
     QPointF globalPoint = ev->globalPos();
     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;
     }
 
     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();
     }
 
     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 KoViewConverter &converter) const
 {
     if (d->activeTool)
         return d->activeTool->inputMethodQuery(query, converter);
     return QVariant();
 }
 
 void KoToolProxy::inputMethodEvent(QInputMethodEvent *event)
 {
     if (d->activeTool) d->activeTool->inputMethodEvent(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->activeTool = tool;
     if (tool) {
         connect(d->activeTool, SIGNAL(selectionChanged(bool)), this, SLOT(selectionChanged(bool)));
         d->selectionChanged(hasSelection());
         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:
         d->activeTool->mousePressEvent(&ev);
         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;
 }
 
 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;
 }
 
 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)) {
         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"