kicad/common/widgets/stepped_slider.cpp

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/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright (C) 2018 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 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, see <http://www.gnu.org/licenses/>.
*/
#include <widgets/stepped_slider.h>
#include <wx/event.h>
BEGIN_EVENT_TABLE( STEPPED_SLIDER, wxSlider )
EVT_SCROLL( STEPPED_SLIDER::OnScroll )
END_EVENT_TABLE()
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STEPPED_SLIDER::STEPPED_SLIDER( wxWindow* aParent, wxWindowID aId, int aValue, int aMinValue,
int aMaxValue, const wxPoint& aPos, const wxSize& aSize,
long aStyle, const wxValidator& aValidator,
const wxString& aName ) :
wxSlider( aParent, aId, aValue, aMinValue, aMaxValue, aPos, aSize,
( aStyle | wxSL_AUTOTICKS | wxSL_MIN_MAX_LABELS ),
aValidator,
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aName ),
m_step( 1 )
{}
STEPPED_SLIDER::~STEPPED_SLIDER()
{}
void STEPPED_SLIDER::SetStep( int aSize )
{
wxASSERT( aSize > 0 );
m_step = ( aSize > 0 ) ? aSize : 1;
// configure pg up/down to increment by our steps
SetPageSize( aSize );
//configure arrows to increment by our steps
SetLineSize( aSize );
#ifdef __WXMSW__
ClearTicks();
if( aSize > 1 )
SetTickFreq( aSize );
#endif // __WXMSW__
}
int STEPPED_SLIDER::GetStep() const
{
return m_step;
}
void STEPPED_SLIDER::OnScroll( wxScrollEvent& aEvent )
{
// On Windows, moving the thumb can generate multiple subevents and wx is blindly
// calling SetValue for each one before calling this event handler
// We need to explicitly wait until the "final" sub event or else we end up fighting
// wx on the value it is setting and extreme glitchlyness will occur
// Not sure if other platforms have this issue
#ifdef __WXMSW__
if( aEvent.GetEventType() == wxEVT_SCROLL_CHANGED )
{
#endif // __WXMSW__
const int value = GetValue();
const int rounded = value - value % m_step;
SetValue( rounded );
#ifdef __WXMSW__
}
#endif // __WXMSW__
aEvent.Skip();
}