stroketool.cpp

/*
 
Pencil2D - Traditional Animation Software
Copyright (C) 2005-2007 Patrick Corrieri & Pascal Naidon
Copyright (C) 2012-2020 Matthew Chiawen Chang
 
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; version 2 of the License.
 
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.
 
*/
 
#include "stroketool.h"
 
#include <QKeyEvent>
#include "scribblearea.h"
#include "strokemanager.h"
#include "viewmanager.h"
#include "editor.h"
#include "toolmanager.h"
 
#ifdef Q_OS_MAC
extern "C" {
    void detectWhichOSX();
    void disableCoalescing();
    void enableCoalescing();
}
#else
extern "C" {
    void detectWhichOSX() {}
    void disableCoalescing() {}
    void enableCoalescing() {}
}
#endif
 
StrokeTool::StrokeTool(QObject* parent) : BaseTool(parent)
{
    detectWhichOSX();
}
 
void StrokeTool::startStroke(PointerEvent::InputType inputType)
{
    if (emptyFrameActionEnabled())
    {
        mScribbleArea->handleDrawingOnEmptyFrame();
    }
 
    mFirstDraw = true;
    mLastPixel = getCurrentPixel();
 
    mStrokePoints.clear();
 
    //Experimental
    QPointF startStrokes = strokeManager()->interpolateStart(mLastPixel);
    mStrokePoints << mEditor->view()->mapScreenToCanvas(startStrokes);
 
    mStrokePressures.clear();
    mStrokePressures << strokeManager()->getPressure();
 
    mCurrentInputType = inputType;
 
    disableCoalescing();
}
 
bool StrokeTool::keyPressEvent(QKeyEvent *event)
{
    switch (event->key()) {
    case Qt::Key_Alt:
        if (mEditor->tools()->setTemporaryTool(EYEDROPPER, {}, Qt::AltModifier))
        {
            return true;
        }
        break;
    case Qt::Key_Space:
        if (mEditor->tools()->setTemporaryTool(HAND, Qt::Key_Space, Qt::NoModifier))
        {
            return true;
        }
        break;
    }
    return BaseTool::keyPressEvent(event);
}
 
bool StrokeTool::emptyFrameActionEnabled()
{
    return true;
}
 
void StrokeTool::endStroke()
{
    strokeManager()->interpolateEnd();
    mStrokePressures << strokeManager()->getPressure();
    mStrokePoints.clear();
    mStrokePressures.clear();
 
    enableCoalescing();
 
    mEditor->setModified(mEditor->currentLayerIndex(), mEditor->currentFrame());
}
 
void StrokeTool::drawStroke()
{
    QPointF pixel = getCurrentPixel();
    if (pixel != mLastPixel || !mFirstDraw)
    {
        // get last pixel before interpolation initializes
        QPointF startStrokes = strokeManager()->interpolateStart(getLastPixel());
        mStrokePoints << mEditor->view()->mapScreenToCanvas(startStrokes);
        mStrokePressures << strokeManager()->getPressure();
    }
    else
    {
        mFirstDraw = false;
    }
}