class_draw_panel_gal.h

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/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2013-2018 CERN
 * Copyright (C) 2013-2020 KiCad Developers, see AUTHORS.txt for contributors.
 *
 * @author Tomasz Wlostowski <tomasz.wlostowski@cern.ch>
 * @author Maciej Suminski <maciej.suminski@cern.ch>
 *
 * 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
 */

#ifndef  PANELGAL_WXSTRUCT_H
#define  PANELGAL_WXSTRUCT_H

#include <wx/window.h>
#include <wx/timer.h>
#include <wx/grid.h> // needed for MSVC to see wxScrolledCanvas indirectly exported
#include <math/box2.h>
#include <math/vector2d.h>
#include <widgets/msgpanel.h>
#include <memory>
#include <cursors.h>

class BOARD;
class EDA_DRAW_FRAME;
class TOOL_DISPATCHER;

namespace KIGFX
{
class GAL;
class VIEW;
class WX_VIEW_CONTROLS;
class VIEW_CONTROLS;
class PAINTER;
class GAL_DISPLAY_OPTIONS;
class VIEW_OVERLAY;
}


class EDA_DRAW_PANEL_GAL : public wxScrolledCanvas
{
public:
    enum GAL_TYPE {
        GAL_TYPE_UNKNOWN = -1,  
        GAL_TYPE_NONE = 0,      
        GAL_TYPE_OPENGL,        
        GAL_TYPE_CAIRO,         
        GAL_TYPE_LAST           
    };

#ifdef __WXMAC__
    // Cairo doesn't work on OSX so we really have no fallback available.
    static constexpr GAL_TYPE GAL_FALLBACK = GAL_TYPE_OPENGL;
#else
    static constexpr GAL_TYPE GAL_FALLBACK = GAL_TYPE_CAIRO;
#endif

    EDA_DRAW_PANEL_GAL( wxWindow* aParentWindow, wxWindowID aWindowId,
                        const wxPoint& aPosition, const wxSize& aSize,
                        KIGFX::GAL_DISPLAY_OPTIONS& aOptions,
                        GAL_TYPE aGalType = GAL_TYPE_OPENGL );
    ~EDA_DRAW_PANEL_GAL();

    virtual void SetFocus() override;

    virtual bool SwitchBackend( GAL_TYPE aGalType );

    inline GAL_TYPE GetBackend() const { return m_backend; }

    KIGFX::GAL* GetGAL() const { return m_gal; }

    virtual KIGFX::VIEW* GetView() const { return m_view; }

    KIGFX::VIEW_CONTROLS* GetViewControls() const
    {
        return (KIGFX::VIEW_CONTROLS*)( m_viewControls );
    }

    virtual void Refresh( bool aEraseBackground = true, const wxRect* aRect = NULL ) override;

    void ForceRefresh();

    void SetEventDispatcher( TOOL_DISPATCHER* aEventDispatcher );

    void StartDrawing();

    void StopDrawing();

    virtual void SetHighContrastLayer( int aLayer );

    virtual void SetTopLayer( int aLayer );

    virtual void GetMsgPanelInfo( EDA_DRAW_FRAME* aFrame, std::vector<MSG_PANEL_ITEM>& aList )
    {
        wxASSERT( false );
    }

    EDA_DRAW_FRAME* GetParentEDAFrame() const { return m_edaFrame; }

    bool IsDialogPreview() const { return m_parent != (wxWindow*) m_edaFrame; }

    virtual void OnShow() {}

    void SetStealsFocus( bool aStealsFocus ) { m_stealsFocus = aStealsFocus; }

    void SetCurrentCursor( KICURSOR cursor );

    virtual BOX2I GetDefaultViewBBox() const { return BOX2I(); }

    void OnEvent( wxEvent& aEvent );

    void DoRePaint();

    std::shared_ptr<KIGFX::VIEW_OVERLAY> DebugOverlay();


    void ClearDebugOverlay();

protected:
    virtual void onPaint( wxPaintEvent& WXUNUSED( aEvent ) );
    void onSize( wxSizeEvent& aEvent );
    void onEnter( wxMouseEvent& aEvent );
    void onLostFocus( wxFocusEvent& aEvent );
    void onRefreshTimer( wxTimerEvent& aEvent );
    void onShowTimer( wxTimerEvent& aEvent );
    void onSetCursor( wxSetCursorEvent& event );

    static const int MinRefreshPeriod = 17;      

    wxCursor                    m_currentCursor;    
    KICURSOR   m_currentKiCursor;

    wxWindow*                m_parent;           
    EDA_DRAW_FRAME*          m_edaFrame;         

    wxLongLong               m_lastRefresh;      
    bool                     m_pendingRefresh;   
    wxTimer                  m_refreshTimer;     

    bool                     m_drawing;

    bool                     m_drawingEnabled;

    wxTimer                  m_onShowTimer;

    KIGFX::GAL*              m_gal;

    KIGFX::VIEW*             m_view;

    std::unique_ptr<KIGFX::PAINTER> m_painter;

    KIGFX::WX_VIEW_CONTROLS* m_viewControls;

    GAL_TYPE                    m_backend;
    KIGFX::GAL_DISPLAY_OPTIONS& m_options;

    TOOL_DISPATCHER*         m_eventDispatcher;

    bool                     m_lostFocus;

    bool                     m_stealsFocus;

    std::shared_ptr<KIGFX::VIEW_OVERLAY> m_debugOverlay;
};

#endif