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/*****************************************************************************
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*****************************************************************************
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* Copyright (C) 2003 VideoLAN
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* $Id: anchor.hpp 7228 2004-04-01 21:04:43Z ipkiss $
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* Authors: Cyril Deguet <asmax@via.ecp.fr>
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* Olivier Teuli�re <ipkiss@via.ecp.fr>
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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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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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
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*****************************************************************************/
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#include "skin_common.hpp"
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#include "generic_layout.hpp"
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#include "../utils/bezier.hpp"
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/// Class for the windows anchors
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class Anchor: public SkinObject
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Anchor( intf_thread_t *pIntf, int xPos, int yPos, int range,
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int priority, const Bezier &rCurve, GenericLayout &rLayout ):
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SkinObject( pIntf ), m_xPos( xPos ), m_yPos( yPos ),
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m_rCurve( rCurve ), m_range( range ), m_priority( priority ),
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m_rLayout( rLayout ) {}
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/// Return true if the given anchor is hanged by this one
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/// Two conditions are required:
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/// - the other anchor must be in position of anchoring (as defined
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/// - the priority of the other anchor must be lower than this one's
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bool isHanging( const Anchor &rOther ) const;
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/// Return true if the other anchor, moved by the (xOffset, yOffset)
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/// vector, is "hangable" by this one (i.e. if it is in its range of
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/// action), else return false.
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/// When the function returns true, the xOffset and yOffset parameters
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/// are modified to indicate the position that the other anchor would
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/// take if hanged by this one (this position is calculated to minimize
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/// the difference with the old xOffset and yOffset, so that the window
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/// doesn't "jump" in a strange way).
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bool canHang( const Anchor &rOther, int &xOffset, int &yOffset ) const;
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// Indicate whether this anchor is reduced to a single point
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bool isPoint() const { return m_rCurve.getNbCtrlPoints() == 1; }
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int getXPosAbs() const { return (m_xPos + m_rLayout.getLeft()); }
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int getYPosAbs() const { return (m_yPos + m_rLayout.getTop()); }
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/// Coordinates relative to the window
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/// Curve of the anchor
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const Bezier &m_rCurve;
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GenericLayout &m_rLayout;