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0001 0002 /* 0003 Copyright (c) 2003-2007 Clarence Dang <dang@kde.org> 0004 All rights reserved. 0005 0006 Redistribution and use in source and binary forms, with or without 0007 modification, are permitted provided that the following conditions 0008 are met: 0009 0010 1. Redistributions of source code must retain the above copyright 0011 notice, this list of conditions and the following disclaimer. 0012 2. Redistributions in binary form must reproduce the above copyright 0013 notice, this list of conditions and the following disclaimer in the 0014 documentation and/or other materials provided with the distribution. 0015 0016 THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 0017 IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 0018 OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 0019 IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 0020 INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 0021 NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 0022 DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 0023 THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 0024 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 0025 THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 0026 */ 0027 0028 0029 #define DEBUG_KP_TOOL_FREE_FROM_SELECTION 0 0030 0031 0032 #include "kpToolFreeFormSelection.h" 0033 0034 #include "kpLogCategories.h" 0035 #include <KLocalizedString> 0036 0037 #include "document/kpDocument.h" 0038 #include "layers/selections/image/kpFreeFormImageSelection.h" 0039 #include "environments/tools/selection/kpToolSelectionEnvironment.h" 0040 0041 //--------------------------------------------------------------------- 0042 0043 kpToolFreeFormSelection::kpToolFreeFormSelection (kpToolSelectionEnvironment *environ, 0044 QObject *parent) 0045 : kpAbstractImageSelectionTool (i18n ("Selection (Free-Form)"), 0046 i18n ("Makes a free-form selection"), 0047 Qt::Key_M, 0048 environ, parent, 0049 QStringLiteral("tool_free_form_selection")) 0050 { 0051 } 0052 0053 //--------------------------------------------------------------------- 0054 0055 kpToolFreeFormSelection::~kpToolFreeFormSelection () = default; 0056 0057 //--------------------------------------------------------------------- 0058 0059 // protected virtual [base kpAbstractSelectionTool] 0060 bool kpToolFreeFormSelection::drawCreateMoreSelectionAndUpdateStatusBar ( 0061 bool dragAccepted, 0062 const QPoint &accidentalDragAdjustedPoint, 0063 const QRect &/*normalizedRect*/) 0064 { 0065 #if DEBUG_KP_TOOL_FREE_FROM_SELECTION 0066 qCDebug(kpLogTools) << "kpToolFreeFormSelection::createMoreSelectionAndUpdateStatusBar(" 0067 << "dragAccepted=" << dragAccepted 0068 << ",accidentalDragAdjustedPoint=" << accidentalDragAdjustedPoint 0069 << ")"; 0070 #endif 0071 0072 // Prevent unintentional creation of 1-pixel selections. 0073 if (!dragAccepted && accidentalDragAdjustedPoint == startPoint ()) 0074 { 0075 #if DEBUG_KP_TOOL_FREE_FROM_SELECTION && 1 0076 qCDebug(kpLogTools) << "\tnon-text NOP - return"; 0077 #endif 0078 setUserShapePoints (accidentalDragAdjustedPoint); 0079 return false; 0080 } 0081 0082 Q_ASSERT (accidentalDragAdjustedPoint == currentPoint ()); 0083 Q_ASSERT (dragAccepted == static_cast<bool> (document ()->selection ())); 0084 0085 const kpFreeFormImageSelection *oldPointsSel = nullptr; 0086 if (document ()->selection ()) 0087 { 0088 kpAbstractSelection *sel = document ()->selection (); 0089 Q_ASSERT (dynamic_cast <kpFreeFormImageSelection *> (sel)); 0090 oldPointsSel = dynamic_cast <kpFreeFormImageSelection *> (sel); 0091 } 0092 0093 0094 QPolygon points; 0095 0096 // First point in drag? 0097 if (!dragAccepted) 0098 { 0099 points.append (startPoint ()); 0100 } 0101 // Not first point in drag. 0102 else 0103 { 0104 if ( !oldPointsSel ) { // assert above says we never reach this, but let's make coverity happy 0105 return false; 0106 } 0107 0108 // Get existing points in selection. 0109 points = oldPointsSel->cardinallyAdjacentPoints (); 0110 } 0111 0112 0113 #if DEBUG_KP_TOOL_FREE_FROM_SELECTION 0114 qCDebug(kpLogTools) << "\tlast old point=" << points.last (); 0115 #endif 0116 0117 // TODO: There should be an upper limit on this before drawing the 0118 // polygon becomes too slow. 0119 points.append (accidentalDragAdjustedPoint); 0120 0121 0122 document ()->setSelection ( 0123 kpFreeFormImageSelection (points, environ ()->imageSelectionTransparency ())); 0124 0125 // Prevent accidental usage of dangling pointer to old selection 0126 // (deleted by kpDocument::setSelection()). 0127 oldPointsSel = nullptr; 0128 0129 #if DEBUG_KP_TOOL_FREE_FROM_SELECTION && 1 0130 qCDebug(kpLogTools) << "\t\tfreeform; #points=" 0131 << document ()->selection ()->calculatePoints ().count (); 0132 #endif 0133 0134 setUserShapePoints (accidentalDragAdjustedPoint); 0135 0136 return true; 0137 } 0138 0139 //---------------------------------------------------------------------