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https://gitlab.com/kicad/code/kicad.git
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5116fa6d12
wxWidgets drives some of this problem, it blindly calls SetValue and invokes the win32 update position messages on all the scroll subevents and we end up fighting it as well by inserting the rounded position on each subevent rather than the final one
90 lines
2.6 KiB
C++
90 lines
2.6 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) 2018 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 modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation, either version 3 of the License, or (at your
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* option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* 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 along
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* with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <widgets/stepped_slider.h>
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#include <wx/event.h>
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BEGIN_EVENT_TABLE( STEPPED_SLIDER, wxSlider )
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EVT_SCROLL( STEPPED_SLIDER::OnScroll )
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END_EVENT_TABLE()
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STEPPED_SLIDER::STEPPED_SLIDER( wxWindow* aParent, wxWindowID aId, int aValue, int aMinValue,
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int aMaxValue, const wxPoint& aPos, const wxSize& aSize,
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long aStyle, const wxValidator& aValidator,
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const wxString& aName ) :
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wxSlider( aParent, aId, aValue, aMinValue, aMaxValue, aPos, aSize,
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( aStyle | wxSL_AUTOTICKS | wxSL_MIN_MAX_LABELS ),
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aValidator,
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aName ),
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m_step( 1 )
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{}
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STEPPED_SLIDER::~STEPPED_SLIDER()
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{}
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void STEPPED_SLIDER::SetStep( int aSize )
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{
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wxASSERT( aSize > 0 );
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m_step = ( aSize > 0 ) ? aSize : 1;
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// configure pg up/down to increment by our steps
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SetPageSize( aSize );
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//configure arrows to incrment by our steps
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SetLineSize( aSize );
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#ifdef __WXMSW__
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ClearTicks();
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if( aSize > 1 )
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SetTickFreq( aSize );
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#endif // __WXMSW__
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}
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int STEPPED_SLIDER::GetStep() const
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{
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return m_step;
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}
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void STEPPED_SLIDER::OnScroll( wxScrollEvent& aEvent )
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{
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// On Windows, moving the thumb can generate multiple subevents and wx is blindly
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// calling SetValue for each one before calling this event handler
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// We need to explicitly wait until the "final" sub event or else we end up fighting
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// wx on the value it is setting and extreme glitchlyness will occur
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// Not sure if other platforms have this issue
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#ifdef __WXMSW__
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if( aEvent.GetEventType() == wxEVT_SCROLL_CHANGED )
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{
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#endif // __WXMSW__
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const int value = GetValue();
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const int rounded = value - value % m_step;
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SetValue( rounded );
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#ifdef __WXMSW__
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}
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#endif // __WXMSW__
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aEvent.Skip();
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}
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