wx_view_controls.h

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/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2012 Torsten Hueter, torstenhtr <at> gmx.de
 * Copyright (C) 2013 CERN
 * Copyright (C) 2020 KiCad Developers, see AUTHORS.txt for contributors.
 *
 * @author Tomasz Wlostowski <tomasz.wlostowski@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 __WX_VIEW_CONTROLS_H
#define __WX_VIEW_CONTROLS_H

#include <wx/wx.h>

#include <view/view_controls.h>

#include <memory>

namespace KIGFX
{

class ZOOM_CONTROLLER;

class WX_VIEW_CONTROLS : public VIEW_CONTROLS, public wxEvtHandler
{
public:
    WX_VIEW_CONTROLS( VIEW* aView, wxScrolledCanvas* aParentPanel );
    virtual ~WX_VIEW_CONTROLS();

    void onWheel( wxMouseEvent& aEvent );
    void onMotion( wxMouseEvent& aEvent );
#if wxCHECK_VERSION( 3, 1, 0 ) || defined( USE_OSX_MAGNIFY_EVENT )
    void onMagnify( wxMouseEvent& aEvent );
#endif
    void onButton( wxMouseEvent& aEvent );
    void onEnter( wxMouseEvent& WXUNUSED( aEvent ) );
    void onLeave( wxMouseEvent& WXUNUSED( aEvent ) );
    void onTimer( wxTimerEvent& WXUNUSED( aEvent ) );
    void onScroll( wxScrollWinEvent& aEvent );
    void onCaptureLost( wxMouseEvent& WXUNUSED( aEvent ) );


    void CaptureCursor( bool aEnabled ) override;


    VECTOR2D GetMousePosition( bool aWorldCoordinates = true ) const override;

    using VIEW_CONTROLS::GetCursorPosition;

    VECTOR2D GetCursorPosition( bool aSnappingEnabled ) const override;

    VECTOR2D GetRawCursorPosition( bool aSnappingEnabled = true ) const override;

    void SetCursorPosition( const VECTOR2D& aPosition, bool warpView,
                            bool aTriggeredByArrows, long aArrowCommand ) override;

    void SetCrossHairCursorPosition( const VECTOR2D& aPosition, bool aWarpView ) override;

    void WarpCursor( const VECTOR2D& aPosition, bool aWorldCoordinates = false,
            bool aWarpView = false ) override;

    void CenterOnCursor() const override;

    void UpdateScrollbars();

    void CancelDrag();

    void ForceCursorPosition( bool aEnabled,
                              const VECTOR2D& aPosition = VECTOR2D( 0, 0 ) ) override;

    void LoadSettings() override;

    static const wxEventType EVT_REFRESH_MOUSE;

private:
    enum STATE
    {
        IDLE = 1,           
        DRAG_PANNING,       
        AUTO_PANNING,       
        DRAG_ZOOMING,       
    };

    bool handleAutoPanning( const wxMouseEvent& aEvent );

    void handleCursorCapture( int x, int y );

    void refreshMouse();

    wxPoint getMouseScreenPosition() const;

    STATE       m_state;

    wxScrolledCanvas* m_parentPanel;

    VECTOR2D    m_dragStartPoint;

    VECTOR2D    m_lookStartPoint;

    VECTOR2D    m_panDirection;

    wxTimer     m_panTimer;

    VECTOR2D    m_scrollScale;

    VECTOR2I    m_scrollPos;

    double      m_initialZoomScale;

    VECTOR2D      m_zoomStartPoint;

#ifdef __WXGTK3__
    long int    m_lastTimestamp;
#endif

    VECTOR2D    m_cursorPos;

    bool        m_updateCursor;

    std::unique_ptr<ZOOM_CONTROLLER> m_zoomController;
};
} // namespace KIGFX

#endif