kicad/include/preview_items/two_point_geom_manager.h

148 lines
3.3 KiB
C++

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