libs/flake

KoParameterChangeStrategy.cpp

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00001 /* This file is part of the KDE project
00002    Copyright (C) 2006 Thorsten Zachmann <zachmann@kde.org>
00003    Copyright (C) 2007 Thomas Zander <zander@kde.org>
00004 
00005    This library is free software; you can redistribute it and/or
00006    modify it under the terms of the GNU Library General Public
00007    License as published by the Free Software Foundation; either
00008    version 2 of the License, or (at your option) any later version.
00009 
00010    This library is distributed in the hope that it will be useful,
00011    but WITHOUT ANY WARRANTY; without even the implied warranty of
00012    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00013    Library General Public License for more details.
00014 
00015    You should have received a copy of the GNU Library General Public License
00016    along with this library; see the file COPYING.LIB.  If not, write to
00017    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
00018  * Boston, MA 02110-1301, USA.
00019 */
00020 #include "KoParameterChangeStrategy.h"
00021 
00022 #include "KoParameterShape.h"
00023 #include "commands/KoParameterHandleMoveCommand.h"
00024 
00025 KoParameterChangeStrategy::KoParameterChangeStrategy(KoTool *tool, KoCanvasBase *canvas, KoParameterShape * parameterShape, int handleId)
00026         : KoInteractionStrategy(tool, canvas)
00027         , m_parameterShape(parameterShape)
00028         , m_handleId(handleId)
00029         , m_startPoint(m_parameterShape->shapeToDocument(m_parameterShape->handlePosition(handleId)))
00030         , m_lastModifierUsed(0)
00031 {
00032     // initialize release point with start point position to prevent
00033     // change when just clicking a handle without moving the mouse
00034     m_releasePoint = m_startPoint;
00035 }
00036 
00037 KoParameterChangeStrategy::~KoParameterChangeStrategy()
00038 {
00039 }
00040 
00041 void KoParameterChangeStrategy::handleMouseMove(const QPointF &mouseLocation, Qt::KeyboardModifiers modifiers)
00042 {
00043     m_parameterShape->moveHandle(m_handleId, mouseLocation, modifiers);
00044     m_lastModifierUsed = modifiers;
00045     m_releasePoint = mouseLocation;
00046 }
00047 
00048 QUndoCommand* KoParameterChangeStrategy::createCommand()
00049 {
00050     KoParameterHandleMoveCommand *cmd = 0;
00051     // check if handle position changed
00052     if (m_startPoint != QPointF(0, 0) && m_startPoint != m_releasePoint) {
00053         cmd = new KoParameterHandleMoveCommand(m_parameterShape, m_handleId, m_startPoint, m_releasePoint, m_lastModifierUsed);
00054     }
00055     return cmd;
00056 }
00057