kicad/common/dialogs/eda_view_switcher.cpp

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/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright (C) 2020-2021 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
*/
#include <dialogs/eda_view_switcher.h>
#ifdef __WXGTK__
#define LIST_BOX_H_PADDING 20
#define LIST_BOX_V_PADDING 8
#else
#define LIST_BOX_H_PADDING 10
#define LIST_BOX_V_PADDING 5
#endif
EDA_VIEW_SWITCHER::EDA_VIEW_SWITCHER( wxWindow* aParent, const wxArrayString& aItems,
wxKeyCode aCtrlKey ) :
EDA_VIEW_SWITCHER_BASE( aParent ),
m_tabState( true ),
m_receivingEvents( false ),
m_ctrlKey( aCtrlKey )
{
m_listBox->InsertItems( aItems, 0 );
m_listBox->SetSelection( std::min( 1, (int) m_listBox->GetCount() - 1 ) );
int width = 0;
int height = 0;
for( const wxString& item : aItems )
{
wxSize extents = m_listBox->GetTextExtent( item );
width = std::max( width, extents.x );
height += extents.y + LIST_BOX_V_PADDING;
}
m_listBox->SetMinSize( wxSize( width + LIST_BOX_H_PADDING,
height + ( LIST_BOX_V_PADDING * 2 ) ) );
SetInitialFocus( m_listBox );
// this line fixes an issue on Linux Ubuntu using Unity (dialog not shown),
// and works fine on all systems
GetSizer()->Fit( this );
Centre();
}
bool EDA_VIEW_SWITCHER::Show( bool aShow )
{
if( !aShow )
m_receivingEvents = false;
bool ret = DIALOG_SHIM::Show( aShow );
if( aShow )
{
m_receivingEvents = true;
// Force the dialog to always be centered over the window
Centre();
}
return ret;
}
// OK, this is *really* annoying, but wxWidgets doesn't give us key-down events while the
// control key is being held down. So we can't use OnKeyDown() or OnCharHook() and instead
// must rely on watching key states in TryBefore().
//
// Just checking the state of the tab key is tempting, but then we'll think it's been hit
// several times when it's actually just a key-down followed by a redraw or idle event.
//
// So we have to keep a state machine of the tab key.
//
bool EDA_VIEW_SWITCHER::TryBefore( wxEvent& aEvent )
{
if( !m_receivingEvents )
{
return DIALOG_SHIM::TryBefore( aEvent );
}
// Check for tab key leading edge
if( !m_tabState && wxGetKeyState( WXK_TAB ) )
{
m_tabState = true;
int idx = m_listBox->GetSelection();
if( wxGetKeyState( WXK_SHIFT ) && m_ctrlKey != WXK_SHIFT )
{
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if( --idx < 0 )
m_listBox->SetSelection( (int) m_listBox->GetCount() - 1 );
else
m_listBox->SetSelection( idx );
}
else
{
if( ++idx >= (int) m_listBox->GetCount() )
m_listBox->SetSelection( 0 );
else
m_listBox->SetSelection( idx );
}
return true;
}
// Check for tab key trailing edge
if( m_tabState && !wxGetKeyState( WXK_TAB ) )
{
m_tabState = false;
}
// Check for control key trailing edge
if( !wxGetKeyState( m_ctrlKey ) )
{
wxPostEvent( this, wxCommandEvent( wxEVT_COMMAND_BUTTON_CLICKED, wxID_OK ) );
}
return DIALOG_SHIM::TryBefore( aEvent );
}