148 lines
3.3 KiB
C++
148 lines
3.3 KiB
C++
/*
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* This program source code file is part of KiCad, a free EDA CAD application.
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*
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* Copyright (C) 2017 KiCad Developers, see AUTHORS.txt for contributors.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, you may find one here:
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* http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
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* or you may search the http://www.gnu.org website for the version 2 license,
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* or you may write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#ifndef PREVIEW_ITEMS_TWO_POINT_GEOMETRY_MANAGER_H
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#define PREVIEW_ITEMS_TWO_POINT_GEOMETRY_MANAGER_H
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#include <math/vector2d.h>
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#include <geometry/geometry_utils.h>
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namespace KIGFX
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{
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class GAL;
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namespace PREVIEW
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{
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/**
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* TWO_POINT_GEOMETRY_MANAGER
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*
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* Represents a very simple geometry manager for items that have
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* a start and end point.
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*/
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class TWO_POINT_GEOMETRY_MANAGER
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{
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public:
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///> Set the origin of the ruler (the fixed end)
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void SetOrigin( const VECTOR2I& aOrigin )
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{
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m_origin = aOrigin;
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m_originSet = true;
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setGeometryChanged();
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}
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VECTOR2I GetOrigin() const
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{
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return m_origin;
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}
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/**
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* Set the current end of the rectangle (the end that moves
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* with the cursor.
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*/
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void SetEnd( const VECTOR2I& aEnd )
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{
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if( m_angleSnap )
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{
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m_end = GetVectorSnapped45( aEnd - m_origin ) + m_origin;
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}
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else
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{
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m_end = aEnd;
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}
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setGeometryChanged();
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}
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VECTOR2I GetEnd() const
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{
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return m_end;
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}
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void SetAngleSnap( bool aSnap )
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{
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m_angleSnap = aSnap;
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}
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bool GetAngleSnap() const
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{
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return m_angleSnap;
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}
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/**
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* @return true if the manager is in the initial state
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*/
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bool IsReset() const
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{
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return !m_originSet;
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}
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/**
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* Reset the manager to the initial state
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*/
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void Reset()
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{
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m_originSet = false;
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setGeometryChanged();
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}
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/**
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* @return true if the geoemtry has changed, eg such that a client
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* should redraw
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*/
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bool HasGeometryChanged() const
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{
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return m_changed;
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}
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/**
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* Clear the geometry changed flag, call after the client code has
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* updated everything as needed.
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*/
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void ClearGeometryChanged()
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{
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m_changed = false;
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}
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protected:
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///> Mark the geometry as changed for clients to notice
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void setGeometryChanged()
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{
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m_changed = true;
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}
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private:
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VECTOR2I m_origin, m_end;
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bool m_angleSnap = false;
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///> Has the gemotry changed such that a client should redraw?
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bool m_changed = false;
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bool m_originSet = false;
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};
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} // PREVIEW
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} // KIGFX
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#endif // PREVIEW_ITEMS_TWO_POINT_GEOMETRY_MANAGER_H
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