kicad/common/tool/selection_tool.cpp

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/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright (C) 2021 KiCad Developers, see CHANGELOG.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 3
* 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/gpl-3.0.html
* or you may search the http://www.gnu.org website for the version 3 license,
* or you may write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include <tool/selection_tool.h>
SELECTION_TOOL::SELECTION_TOOL() :
m_additive( false ),
m_subtractive( false ),
m_exclusive_or( false ),
m_multiple( false ),
m_skip_heuristics( false ),
m_highlight_modifier( false ),
m_drag_additive( false ),
m_drag_subtractive( false ),
m_canceledMenu( false )
{
}
void SELECTION_TOOL::setModifiersState( bool aShiftState, bool aCtrlState, bool aAltState )
{
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// Set the configuration of m_additive, m_subtractive, m_exclusive_or from the state of
// modifier keys SHIFT and CTRL
// ALT key cannot be used on MSW because of a conflict with the system menu
m_subtractive = aCtrlState && aShiftState;
m_additive = !aCtrlState && aShiftState;
m_exclusive_or = false;
m_highlight_modifier = aCtrlState && !aShiftState;
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// Drag is more forgiving and allows either Ctrl+Drag or Shift+Drag to add to the selection
// Note, however that we cannot provide disambiguation at the same time as the box selection
m_drag_additive = ( aCtrlState || aShiftState ) && !aAltState;
m_drag_subtractive = aCtrlState && aShiftState && !aAltState;
// While the ALT key has some conflicts under MSW (and some flavors of Linux WMs), it remains
// useful for users who only use tap-click rather than holding the button. We disable it for
// windows because it flashes the disambiguation menu without showing data
#ifndef __WINDOWS__
m_skip_heuristics = aAltState;
#else
m_skip_heuristics = false;
#endif
}