File indexing completed on 2024-04-28 04:20:27

 
 /*
    Copyright (c) 2003-2007 Clarence Dang <dang@kde.org>
    All rights reserved.
 
    Redistribution and use in source and binary forms, with or without
    modification, are permitted provided that the following conditions
    are met:
 
    1. Redistributions of source code must retain the above copyright
       notice, this list of conditions and the following disclaimer.
    2. Redistributions in binary form must reproduce the above copyright
       notice, this list of conditions and the following disclaimer in the
       documentation and/or other materials provided with the distribution.
 
    THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
    IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
    OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
    IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
    INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
    NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
    DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
    THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
    (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
    THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 
 //
 // Tool utility methods - mainly for subclasses' convenience.
 //
 
 
 #define DEBUG_KP_TOOL 0
 
 
 #include "tools/kpTool.h"
 #include "kpToolPrivate.h"
 
 #include <QCursor>
 #include <QPixmap>
 
 #include "kpLogCategories.h"
 #include <KMessageBox>
 
 #include "commands/kpCommandSize.h"
 #include "kpDefs.h"
 #include "imagelib/kpPainter.h"
 #include "pixmapfx/kpPixmapFX.h"
 #include "views/kpView.h"
 
 //---------------------------------------------------------------------
 
 // static
 QRect kpTool::neededRect (const QRect &rect, int lineWidth)
 {
     int x1, y1, x2, y2;
     rect.getCoords (&x1, &y1, &x2, &y2);
 
     if (lineWidth < 1) {
         lineWidth = 1;
     }
 
     // TODO: why not divide by 2?
     return QRect (QPoint (x1 - lineWidth + 1, y1 - lineWidth + 1),
                   QPoint (x2 + lineWidth - 1, y2 + lineWidth - 1));
 }
 
 //---------------------------------------------------------------------
 
 // static
 QImage kpTool::neededPixmap (const QImage &image, const QRect &boundingRect)
 {
     return kpPixmapFX::getPixmapAt (image, boundingRect);
 }
 
 //---------------------------------------------------------------------
 
 // public
 bool kpTool::hasCurrentPoint () const
 {
     return (viewUnderStartPoint () || viewUnderCursor ());
 }
 
 //---------------------------------------------------------------------
 
 // public
 QPoint kpTool::calculateCurrentPoint (bool zoomToDoc) const
 {
 #if DEBUG_KP_TOOL && 0
     qCDebug(kpLogTools) << "kpTool::currentPoint(zoomToDoc=" << zoomToDoc << ")";
     qCDebug(kpLogTools) << "\tviewUnderStartPoint="
                << (viewUnderStartPoint () ? viewUnderStartPoint ()->objectName () : "(none)")
                << " viewUnderCursor="
                << (viewUnderCursor () ? viewUnderCursor ()->objectName () : "(none)")
                << endl;
 #endif
 
     kpView *v = viewUnderStartPoint ();
     if (!v)
     {
         v = viewUnderCursor ();
         if (!v)
         {
         #if DEBUG_KP_TOOL && 0
             qCDebug(kpLogTools) << "\tno view - returning sentinel";
         #endif
             return KP_INVALID_POINT;
         }
     }
 
 
     const QPoint globalPos = QCursor::pos ();
     const QPoint viewPos = v->mapFromGlobal (globalPos);
 #if DEBUG_KP_TOOL && 0
     qCDebug(kpLogTools) << "\tglobalPos=" << globalPos
                << " viewPos=" << viewPos;
 #endif
     if (!zoomToDoc) {
         return viewPos;
     }
 
 
     const QPoint docPos = v->transformViewToDoc (viewPos);
 #if DEBUG_KP_TOOL && 0
     qCDebug(kpLogTools) << "\tdocPos=" << docPos;
 #endif
     return docPos;
 }
 
 //---------------------------------------------------------------------
 
 // public slot
 void kpTool::somethingBelowTheCursorChanged ()
 {
     somethingBelowTheCursorChanged (calculateCurrentPoint (),
         calculateCurrentPoint (false/*view point*/));
 }
 
 //---------------------------------------------------------------------
 
 // private
 // TODO: don't dup code from mouseMoveEvent()
 void kpTool::somethingBelowTheCursorChanged (const QPoint &currentPoint_,
         const QPoint &currentViewPoint_)
 {
 #if DEBUG_KP_TOOL && 1
     qCDebug(kpLogTools) << "kpTool::somethingBelowTheCursorChanged(docPoint="
                << currentPoint_
                << " viewPoint="
                << currentViewPoint_
                << ")" << endl;
     qCDebug(kpLogTools) << "\tviewUnderStartPoint="
                << (viewUnderStartPoint () ? viewUnderStartPoint ()->objectName () : "(none)")
                << " viewUnderCursor="
                << (viewUnderCursor () ? viewUnderCursor ()->objectName () : "(none)")
                << endl;
     qCDebug(kpLogTools) << "\tbegan draw=" << d->beganDraw;
 #endif
 
     d->currentPoint = currentPoint_;
     d->currentViewPoint = currentViewPoint_;
 
     if (d->beganDraw)
     {
         if (d->currentPoint != KP_INVALID_POINT)
         {
             draw (d->currentPoint, d->lastPoint, normalizedRect ());
             d->lastPoint = d->currentPoint;
         }
     }
     else
     {
         hover (d->currentPoint);
     }
 }
 
 //---------------------------------------------------------------------
 
 bool kpTool::currentPointNextToLast () const
 {
     if (d->lastPoint == QPoint (-1, -1)) {
         return true;
     }
 
     int dx = qAbs (d->currentPoint.x () - d->lastPoint.x ());
     int dy = qAbs (d->currentPoint.y () - d->lastPoint.y ());
 
     return (dx <= 1 && dy <= 1);
 }
 
 //---------------------------------------------------------------------
 
 bool kpTool::currentPointCardinallyNextToLast () const
 {
     if (d->lastPoint == QPoint (-1, -1)) {
         return true;
     }
 
     return (d->currentPoint == d->lastPoint ||
             kpPainter::pointsAreCardinallyAdjacent (d->currentPoint, d->lastPoint));
 }
 
 //---------------------------------------------------------------------
 
 // static
 // TODO: we don't handle Qt::XButton1 and Qt::XButton2 at the moment.
 int kpTool::mouseButton (Qt::MouseButtons mouseButtons)
 {
     // we have nothing to do with mid-buttons
     if (mouseButtons & Qt::MiddleButton) {
         return -1;
     }
 
     // both left & right together is quite meaningless...
     const Qt::MouseButtons bothButtons = (Qt::LeftButton | Qt::RightButton);
     if ((mouseButtons & bothButtons) == bothButtons) {
         return -1;
     }
 
     if (mouseButtons & Qt::LeftButton) {
         return 0;
     }
     if (mouseButtons & Qt::RightButton) {
         return 1;
     }
 
     return -1;
 }
 
 //---------------------------------------------------------------------
 
 // public static
 int kpTool::calculateLength (int start, int end)
 {
     if (start <= end)
     {
         return end - start + 1;
     }
 
     return end - start - 1;
 }
 
 //---------------------------------------------------------------------
 
 // public static
 bool kpTool::warnIfBigImageSize (int oldWidth, int oldHeight,
                                  int newWidth, int newHeight,
                                  const QString &text,
                                  const QString &caption,
                                  const QString &continueButtonText,
                                  QWidget *parent)
 {
 #if DEBUG_KP_TOOL
     qCDebug(kpLogTools) << "kpTool::warnIfBigImageSize()"
                << " old: w=" << oldWidth << " h=" << oldWidth
                << " new: w=" << newWidth << " h=" << newHeight
                << " pixmapSize="
                << kpPixmapFX::pixmapSize (newWidth,
                                           newHeight,
                                           QPixmap::defaultDepth ())
                << " vs BigImageSize=" << KP_BIG_IMAGE_SIZE
                << endl;
 #endif
 
     // Only got smaller or unchanged - don't complain
     if (!(newWidth > oldWidth || newHeight > oldHeight))
     {
         return true;
     }
 
     // Was already large - user was warned before, don't annoy him/her again
     if (kpCommandSize::PixmapSize (oldWidth, oldHeight, QPixmap::defaultDepth ()) >=
         KP_BIG_IMAGE_SIZE)
     {
         return true;
     }
 
     if (kpCommandSize::PixmapSize (newWidth, newHeight, QPixmap::defaultDepth ()) >=
         KP_BIG_IMAGE_SIZE)
     {
         int accept = KMessageBox::warningContinueCancel (parent,
             text,
             caption,
             KGuiItem (continueButtonText),
             KStandardGuiItem::cancel(),
             QStringLiteral ("BigImageDontAskAgain"));
 
         return (accept == KMessageBox::Continue);
     }
 
     return true;
 }
 
 //---------------------------------------------------------------------