forked from openkylin/kolourpaint
140 lines
4.8 KiB
C++
140 lines
4.8 KiB
C++
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/*
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Copyright (c) 2003-2007 Clarence Dang <dang@kde.org>
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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1. Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#define DEBUG_KP_TOOL_FREE_FROM_SELECTION 0
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#include "kpToolFreeFormSelection.h"
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#include "kpLogCategories.h"
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#include <KLocalizedString>
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#include "document/kpDocument.h"
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#include "layers/selections/image/kpFreeFormImageSelection.h"
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#include "environments/tools/selection/kpToolSelectionEnvironment.h"
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//---------------------------------------------------------------------
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kpToolFreeFormSelection::kpToolFreeFormSelection (kpToolSelectionEnvironment *environ,
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QObject *parent)
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: kpAbstractImageSelectionTool (i18n ("Selection (Free-Form)"),
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i18n ("Makes a free-form selection"),
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Qt::Key_M,
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environ, parent,
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QStringLiteral("tool_free_form_selection"))
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{
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}
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//---------------------------------------------------------------------
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kpToolFreeFormSelection::~kpToolFreeFormSelection () = default;
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//---------------------------------------------------------------------
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// protected virtual [base kpAbstractSelectionTool]
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bool kpToolFreeFormSelection::drawCreateMoreSelectionAndUpdateStatusBar (
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bool dragAccepted,
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const QPoint &accidentalDragAdjustedPoint,
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const QRect &/*normalizedRect*/)
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{
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#if DEBUG_KP_TOOL_FREE_FROM_SELECTION
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qCDebug(kpLogTools) << "kpToolFreeFormSelection::createMoreSelectionAndUpdateStatusBar("
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<< "dragAccepted=" << dragAccepted
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<< ",accidentalDragAdjustedPoint=" << accidentalDragAdjustedPoint
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<< ")";
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#endif
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// Prevent unintentional creation of 1-pixel selections.
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if (!dragAccepted && accidentalDragAdjustedPoint == startPoint ())
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{
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#if DEBUG_KP_TOOL_FREE_FROM_SELECTION && 1
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qCDebug(kpLogTools) << "\tnon-text NOP - return";
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#endif
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setUserShapePoints (accidentalDragAdjustedPoint);
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return false;
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}
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Q_ASSERT (accidentalDragAdjustedPoint == currentPoint ());
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Q_ASSERT (dragAccepted == static_cast<bool> (document ()->selection ()));
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const kpFreeFormImageSelection *oldPointsSel = nullptr;
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if (document ()->selection ())
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{
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kpAbstractSelection *sel = document ()->selection ();
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Q_ASSERT (dynamic_cast <kpFreeFormImageSelection *> (sel));
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oldPointsSel = dynamic_cast <kpFreeFormImageSelection *> (sel);
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}
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QPolygon points;
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// First point in drag?
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if (!dragAccepted)
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{
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points.append (startPoint ());
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}
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// Not first point in drag.
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else
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{
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if ( !oldPointsSel ) { // assert above says we never reach this, but let's make coverity happy
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return false;
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}
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// Get existing points in selection.
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points = oldPointsSel->cardinallyAdjacentPoints ();
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}
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#if DEBUG_KP_TOOL_FREE_FROM_SELECTION
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qCDebug(kpLogTools) << "\tlast old point=" << points.last ();
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#endif
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// TODO: There should be an upper limit on this before drawing the
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// polygon becomes too slow.
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points.append (accidentalDragAdjustedPoint);
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document ()->setSelection (
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kpFreeFormImageSelection (points, environ ()->imageSelectionTransparency ()));
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// Prevent accidental usage of dangling pointer to old selection
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// (deleted by kpDocument::setSelection()).
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oldPointsSel = nullptr;
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#if DEBUG_KP_TOOL_FREE_FROM_SELECTION && 1
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qCDebug(kpLogTools) << "\t\tfreeform; #points="
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<< document ()->selection ()->calculatePoints ().count ();
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#endif
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setUserShapePoints (accidentalDragAdjustedPoint);
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return true;
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}
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//---------------------------------------------------------------------
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