kicad/include/wxBasePcbFrame.h

/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2012 Jean-Pierre Charras, jp.charras at wanadoo.fr
 * Copyright (C) 2008-2011 Wayne Stambaugh <stambaughw@verizon.net>
 * Copyright (C) 1992-2011 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
 */

/**
 * @file wxBasePcbFrame.h
 * @brief Classes used in Pcbnew, CvPcb and GerbView.
 */

#ifndef  WX_BASE_PCB_FRAME_H_
#define  WX_BASE_PCB_FRAME_H_


#include <vector>

#include <wxstruct.h>
#include <base_struct.h>
#include <eda_text.h>                // EDA_DRAW_MODE_T
#include <richio.h>
#include <class_pcb_screen.h>


/* Forward declarations of classes. */
class BOARD;
class BOARD_CONNECTED_ITEM;
class MODULE;
class TRACK;
class D_PAD;
class TEXTE_MODULE;
class EDA_3D_FRAME;
class GENERAL_COLLECTOR;
class GENERAL_COLLECTORS_GUIDE;
class BOARD_DESIGN_SETTINGS;
class ZONE_SETTINGS;
class PCB_PLOT_PARAMS;
class FP_LIB_TABLE;
class FPID;
class TOOL_MANAGER;
class TOOL_DISPATCHER;

/**
 * class PCB_BASE_FRAME
 * basic PCB main window class for Pcbnew, Gerbview, and CvPcb footprint viewer.
 */
class PCB_BASE_FRAME : public EDA_DRAW_FRAME
{
public:
    bool m_DisplayPadFill;          // How show pads
    bool m_DisplayViaFill;          // How show vias
    bool m_DisplayPadNum;           // show pads numbers

    int  m_DisplayModEdge;          // How to display module drawings (line/ filled / sketch)
    int  m_DisplayModText;          // How to display module texts (line/ filled / sketch)
    bool m_DisplayPcbTrackFill;     // false : tracks are show in sketch mode, true = filled.
    EDA_UNITS_T m_UserGridUnit;
    wxRealPoint m_UserGridSize;

    int m_FastGrid1;                // 1st fast grid setting (index in EDA_DRAW_FRAME::m_gridSelectBox)
    int m_FastGrid2;                // 2nd fast grid setting (index in EDA_DRAW_FRAME::m_gridSelectBox)

    EDA_3D_FRAME* m_Draw3DFrame;


protected:
    BOARD*              m_Pcb;
    GENERAL_COLLECTOR*  m_Collector;

    /// The project footprint library table.  This is a combination of the project
    /// footprint library table and the global footprint table.  This is the one to
    /// use when finding a #MODULE.
    FP_LIB_TABLE*       m_footprintLibTable;

    /// Auxiliary tool bar typically shown below the main tool bar at the top of the
    /// main window.
    wxAuiToolBar*       m_auxiliaryToolBar;

    TOOL_MANAGER&       m_toolManager;
    TOOL_DISPATCHER*    m_toolDispatcher;

    void updateGridSelectBox();
    void updateZoomSelectBox();
    virtual void unitsChangeRefresh();

    /**
     * Function loadFootprint
     * attempts to load \a aFootprintId from the footprint library table.
     *
     * @param aFootprintId is the #FPID of component footprint to load.
     * @return the #MODULE if found or NULL if \a aFootprintId not found in any of the
     *         libraries in #m_footprintLibTable.
     * @throw IO_ERROR if an I/O error occurs or a #PARSE_ERROR if a file parsing error
     *                 occurs while reading footprint library files.
     */
    MODULE* loadFootprint( const FPID& aFootprintId )
        throw( IO_ERROR, PARSE_ERROR );

    ///> Rendering order of layers on GAL-based canvas (lower index in the array
    ///> means that layer is displayed closer to the user, ie. on the top).
    static const LAYER_NUM GAL_LAYER_ORDER[];

public:
    PCB_BASE_FRAME( wxWindow* aParent, ID_DRAWFRAME_TYPE aFrameType,
                    const wxString& aTitle,
                    const wxPoint& aPos, const wxSize& aSize,
                    long aStyle, const wxString & aFrameName );

    ~PCB_BASE_FRAME();

    /**
     * Function LoadFootprint
     * attempts to load \a aFootprintId from the footprint library table.
     *
     * @param aFootprintId is the #FPID of component footprint to load.
     * @return the #MODULE if found or NULL if \a aFootprintId not found in any of the
     *         libraries in #m_footprintLibTable.
     */
    MODULE* LoadFootprint( const FPID& aFootprintId );

    /**
     * Function GetBoardBoundingBox
     * calculates the bounding box containing all board items (or board edge segments).
     * @param aBoardEdgesOnly is true if we are interested in board edge segments only.
     * @return EDA_RECT - the board's bounding box
     */
    EDA_RECT    GetBoardBoundingBox( bool aBoardEdgesOnly = false ) const;

    void SetPageSettings( const PAGE_INFO& aPageSettings );     // overload
    const PAGE_INFO& GetPageSettings() const;                   // overload
    const wxSize GetPageSizeIU() const;                         // overload

    const wxPoint& GetAuxOrigin() const;                        // overload
    void SetAuxOrigin( const wxPoint& aPoint );                 // overload

    const wxPoint& GetGridOrigin() const;                       // overload
    void SetGridOrigin( const wxPoint& aPoint );                // overload

    const TITLE_BLOCK& GetTitleBlock() const;                   // overload
    void SetTitleBlock( const TITLE_BLOCK& aTitleBlock );       // overload

    /**
     * Function GetDesignSettings
     * returns the BOARD_DESIGN_SETTINGS for the BOARD owned by this frame.
     * Overloaded in FOOTPRINT_EDIT_FRAME.
     */
    virtual BOARD_DESIGN_SETTINGS& GetDesignSettings() const;
    virtual void SetDesignSettings( const BOARD_DESIGN_SETTINGS& aSettings );

    const ZONE_SETTINGS& GetZoneSettings() const;
    void SetZoneSettings( const ZONE_SETTINGS& aSettings );

    /**
     * Function GetPlotSettings
     * returns the PCB_PLOT_PARAMS for the BOARD owned by this frame.
     * Overloaded in FOOTPRINT_EDIT_FRAME.
     */
    virtual const PCB_PLOT_PARAMS& GetPlotSettings() const;
    virtual void SetPlotSettings( const PCB_PLOT_PARAMS& aSettings );

    /**
     * Function SetBoard
     * sets the m_Pcb member in such as way as to ensure deleting any previous
     * BOARD.
     * @param aBoard The BOARD to put into the frame.
     */
    virtual void SetBoard( BOARD* aBoard );

    BOARD* GetBoard() const
    {
        wxASSERT( m_Pcb );
        return m_Pcb;
    }

    /**
     * Function SetFootprintLibTable
     * set the footprint library table to \a aFootprintLibTable.
     *
     * @param aFootprintLibTable is a pointer to the #FP_LIB_TABLE object.
     */
    void SetFootprintLibTable( FP_LIB_TABLE* aFootprintLibTable )
    {
        m_footprintLibTable = aFootprintLibTable;
    }

    // General
    virtual void OnCloseWindow( wxCloseEvent& Event ) = 0;
    virtual void RedrawActiveWindow( wxDC* DC, bool EraseBg ) { }
    virtual void ReCreateHToolbar() = 0;
    virtual void ReCreateVToolbar() = 0;
    virtual void OnLeftClick( wxDC* DC, const wxPoint& MousePos ) = 0;
    virtual void OnLeftDClick( wxDC* DC, const wxPoint& MousePos ) = 0;
    virtual bool OnRightClick( const wxPoint& MousePos, wxMenu* PopMenu )  = 0;
    virtual void ReCreateMenuBar();
    virtual void SetToolID( int aId, int aCursor, const wxString& aToolMsg );
    virtual void UpdateStatusBar();

    PCB_SCREEN* GetScreen() const { return (PCB_SCREEN*) EDA_DRAW_FRAME::GetScreen(); }

    /**
     * Function BestZoom
     * @return the "best" zoom to show the entire board or footprint on the screen.
     */
    virtual double BestZoom();

    virtual void Show3D_Frame( wxCommandEvent& event );

    // Read/write functions:
    EDA_ITEM* ReadDrawSegmentDescr( LINE_READER* aReader );
    int ReadListeSegmentDescr( LINE_READER* aReader,
                               TRACK*       PtSegm,
                               int          StructType,
                               int          NumSegm );

    int ReadSetup( LINE_READER* aReader );
    int ReadGeneralDescrPcb( LINE_READER* aReader );


    /**
     * Function PcbGeneralLocateAndDisplay
     * searches for an item under the mouse cursor.
     * Items are searched first on the current working layer.
     * If nothing found, an item will be searched without layer restriction.
     * If more than one item is found meeting the current working layer
     * criterion, then a popup menu is shown which allows the user to pick
     * which item he/she is interested in.  Once an item is chosen, then it
     * is make the "current item" and the status window is updated to reflect
     * this.
     *
     * @param aHotKeyCode The hotkey which relates to the caller and determines
     *                    the type of search to be performed.  If zero, then
     *                    the mouse tools will be tested instead.
     */
    BOARD_ITEM* PcbGeneralLocateAndDisplay( int aHotKeyCode = 0 );

    void ProcessItemSelection( wxCommandEvent& event );

    /**
     * Function SetCurItem
     * sets the currently selected item and displays it in the MsgPanel.
     * If the given item is NULL then the MsgPanel is erased and there is no
     * currently selected item. This function is intended to make the process
     * of "selecting" an item more formal, and to indivisibly tie the operation
     * of selecting an item to displaying it using BOARD_ITEM::Display_Infos().
     * @param aItem The BOARD_ITEM to make the selected item or NULL if none.
     * @param aDisplayInfo = true to display item info, false if not (default = true)
     */
    void SetCurItem( BOARD_ITEM* aItem, bool aDisplayInfo = true );

    BOARD_ITEM* GetCurItem();

    /**
     * Function GetCollectorsGuide
     * @return GENERAL_COLLECTORS_GUIDE - that considers the global
     *configuration options.
     */
    GENERAL_COLLECTORS_GUIDE GetCollectorsGuide();

    /**
     * Function CursorGoto
     * positions the cursor at a given coordinate and reframes the drawing if the
     * requested point is out of view.
     * @param aPos is the point to go to.
     * @param aWarp is true if the pointer should be warped to the new position.
     */
    void CursorGoto( const wxPoint& aPos, bool aWarp = true );

    /**
     * Function Save_Module_In_Library
     *  Save in an existing library a given footprint
     * @param aLibName = name of the library to use
     * @param aModule = the given footprint
     * @param aOverwrite = true to overwrite an existing footprint, false to
     *                     abort if an existing footprint with same name is found
     * @param aDisplayDialog = true to display a dialog to enter or confirm the
     *                         footprint name
     * @return : true if OK, false if abort
     */
    bool Save_Module_In_Library( const wxString& aLibName,
                                 MODULE*         aModule,
                                 bool            aOverwrite,
                                 bool            aDisplayDialog );

    /**
     * Function SelectLibrary
     * puts up a dialog and allows the user to pick a library, for unspecified use.
     *
     * @param aNicknameExisting is the current choice to highlight
     *
     * @return wxString - the library or wxEmptyString on abort.
     */
    wxString SelectLibrary( const wxString& aNicknameExisting );

    MODULE* GetModuleByName();

    /**
     * Function OnModify
     * Virtual
     * Must be called after a change
     * in order to set the "modify" flag of the current screen
     * and update the date in frame reference
     * do not forget to call this basic OnModify function to update info
     * in derived OnModify functions
     */
    virtual void OnModify();

    // Modules (footprints)
    /**
     * Function Create_1_Module
     * Creates a new module or footprint : A new module contains 2 texts :
     *  First = REFERENCE
     *  Second = VALUE: "VAL**"
     * the new module is added to the board module list
     * @param aModuleName = name of the new footprint
     *                  (will be the component reference in board)
     * @return a pointer to the new module
     */
    MODULE* Create_1_Module( const wxString& aModuleName );

    void Edit_Module( MODULE* module, wxDC* DC );
    void Rotate_Module( wxDC* DC, MODULE* module, double angle, bool incremental );

    /**
     * Function PlaceModule
     * places \a aModule at the current cursor position and updates module coordinates
     * with the new position.
     *
     * @param aModule A MODULE object point of the module to be placed.
     * @param aDC A wxDC object point of the device context to draw \a aModule on
     *            or  NULL if no display screen need updated.
     * @param aDoNotRecreateRatsnest A bool true redraws the module rats nest.
     */
    void PlaceModule( MODULE* aModule, wxDC* aDC, bool aDoNotRecreateRatsnest = false );

    // module texts
    void RotateTextModule( TEXTE_MODULE* Text, wxDC* DC );
    void DeleteTextModule( TEXTE_MODULE* Text );
    void PlaceTexteModule( TEXTE_MODULE* Text, wxDC* DC );
    void StartMoveTexteModule( TEXTE_MODULE* Text, wxDC* DC );
    TEXTE_MODULE* CreateTextModule( MODULE* Module, wxDC* DC );

    /**
     * Function ResetTextSize
     * resets given field text size and width to current settings in
     * Preferences->Dimensions->Texts and Drawings.
     * @param aItem is the item to be reset, either TEXTE_PCB or TEXTE_MODULE.
     * @param aDC is the drawing context.
     */
    void ResetTextSize( BOARD_ITEM* aItem, wxDC* aDC );

    /**
     * Function ResetModuleTextSizes
     * resets text size and width of all module text fields of given field
     * type to current settings in Preferences->Dimensions->Texts and Drawings.
     * @param aFilter is a filter: footprint names must match this filter.
     *        an empty filter, or "*" do not filter anything.
     * @param aRef = true to modify the reference of footprints.
     * @param aValue = true to modify the value of footprints.
     * @param aOthers = true to modify the other fields of footprints.
     */
    void ResetModuleTextSizes( const wxString & aFilter, bool aRef,
                               bool aValue, bool aOthers );

    void InstallPadOptionsFrame( D_PAD*         pad );
    void InstallTextModOptionsFrame( TEXTE_MODULE* TextMod, wxDC* DC );

    void AddPad( MODULE* Module, bool draw );

    /**
     * Function DeletePad
     * Delete the pad aPad.
     * Refresh the modified screen area
     * Refresh modified parameters of the parent module (bounding box, last date)
     * @param aPad = the pad to delete
     * @param aQuery = true to prompt for confirmation, false to delete silently
     */
    void DeletePad( D_PAD* aPad, bool aQuery = true );

    /**
     * Function StartMovePad
     * Initialize a drag or move pad command
     * @param aPad = the pad to move or drag
     * @param aDC = the current device context
     * @param aDragConnectedTracks = true to drag connected tracks,
     *                               false to just move the pad
     */
    void StartMovePad( D_PAD* aPad, wxDC* aDC, bool aDragConnectedTracks );

    void RotatePad( D_PAD* Pad, wxDC* DC );
    void PlacePad( D_PAD* Pad, wxDC* DC );
    void Export_Pad_Settings( D_PAD* aPad );
    void Import_Pad_Settings( D_PAD* aPad, bool aDraw );

    /**
     * Function GlobalChange_PadSettings
     * Function to change pad caracteristics for the given footprint
     * or all footprints which look like the given footprint
     * @param aPad is the pattern. The given footprint is the parent of this pad
     * @param aSameFootprints: if true, make changes on all identical footprints
     * @param aPadShapeFilter: if true, make changes only on pads having the same shape as aPad
     * @param aPadOrientFilter: if true, make changes only on pads having the same orientation as aPad
     * @param aPadLayerFilter: if true, make changes only on pads having the same layers as aPad
     * @param aRedraw: if true: redraws the footprint
     * @param aSaveForUndo: if true: create an entry in the Undo/Redo list
     *        (usually: true in Schematic editor, false in Module editor)
     */
    void GlobalChange_PadSettings( D_PAD* aPad,
                                   bool   aSameFootprints,
                                   bool   aPadShapeFilter,
                                   bool   aPadOrientFilter,
                                   bool   aPadLayerFilter,
                                   bool   aRedraw,
                                   bool   aSaveForUndo );

    /**
     * Function SelectFootprint
     * displays a list of modules found in all libraries or a given library
     *
     *  @param aWindow = the current window ( parent window )
     *
     *  @param aLibraryName = library to list (if aLibraryFullFilename is empty, then list all modules).
     *           This is a nickname for the FP_LIB_TABLE build.
     *
     *  @param aMask = Display filter (wildcart)( Mask = wxEmptyString if not used )
     *
     *  @param aKeyWord = keyword list, to display a filtered list of module
     *                    having one (or more) of these keywords in their
     *                    keyword list ( aKeyWord = wxEmptyString if not used )
     *
     *  @param aTable is the #FP_LIB_TABLE to search.
     *
     *  @return wxEmptyString if abort or fails, or the selected module name if Ok
     */
    wxString SelectFootprint( EDA_DRAW_FRAME* aWindow,
                              const wxString& aLibraryName,
                              const wxString& aMask,
                              const wxString& aKeyWord,
                              FP_LIB_TABLE*   aTable );

    /**
     * Function LoadModuleFromLibrary
     * opens a dialog to select a footprint, and loads it into current board.
     *
     * @param aLibrary = the library name to use, or empty string to search
     * in all loaded libraries
     * @param aTable is the #FP_LIB_TABLE containing the avaiable footprint libraries.
     * @param aUseFootprintViewer = true to show the option
     * allowing the footprint selection by the footprint viewer
     * @param aDC (can be NULL ) = the current Device Context, to draw the new footprint
     */
    MODULE* LoadModuleFromLibrary( const wxString& aLibrary,
                                   FP_LIB_TABLE*   aTable,
                                   bool            aUseFootprintViewer = true,
                                   wxDC*           aDC = NULL );

    /**
     * Function SelectFootprintFromLibBrowser
     * launches the footprint viewer to select the name of a footprint to load.
     *
     * @return the selected footprint name or an empty string if no selection was made.
     */
    wxString SelectFootprintFromLibBrowser();

    /**
     * Function GetFootprintLibraryTable
     * @return the project #FP_LIB_TABLE so programs can find footprints.
     */
    FP_LIB_TABLE* GetFootprintLibraryTable() { return m_footprintLibTable; }

    void SetFootprintLibraryTable( FP_LIB_TABLE* aTable ) { m_footprintLibTable = aTable; }

    //  ratsnest functions
    /**
     * Function Compile_Ratsnest
     *  Create the entire board ratsnest.
     *  Must be called after a board change (changes for
     *  pads, footprints or a read netlist ).
     * @param aDC = the current device context (can be NULL)
     * @param aDisplayStatus : if true, display the computation results
     */
    void Compile_Ratsnest( wxDC* aDC, bool aDisplayStatus );

    /**
     * Function build_ratsnest_module
     * Build a ratsnest relative to one footprint. This is a simplified computation
     * used only in move footprint. It is not optimal, but it is fast and sufficient
     * to help a footprint placement
     * It shows the connections from a pad to the nearest connected pad
     * @param aModule = module to consider.
     */
    void build_ratsnest_module( MODULE* aModule );

    /**
     * Function TraceModuleRatsNest
     * display the rats nest of a moving footprint, computed by
     * build_ratsnest_module()
     */
    void TraceModuleRatsNest( wxDC* aDC );

    /**
     * Function Build_Board_Ratsnest.
     * Calculates the full ratsnest depending only on pads.
     */
    void Build_Board_Ratsnest();

    /**
     *  function Displays the general ratsnest
     *  Only ratsnest with the status bit CH_VISIBLE is set are displayed
     * @param aDC = the current device context (can be NULL)
     * @param aNetcode if > 0, Display only the ratsnest relative to the
     *                 corresponding net_code
     */
    void DrawGeneralRatsnest( wxDC* aDC, int aNetcode = 0 );

    /**
     * Function TraceAirWiresToTargets
     * This functions shows airwires to nearest connecting points (pads)
     * from the current new track end during track creation
     * Uses data prepared by BuildAirWiresTargetsList()
     * @param aDC = the current device context
     */
    void TraceAirWiresToTargets( wxDC* aDC );

    /**
     * Function BuildAirWiresTargetsList
     * Build a list of candidates that can be a coonection point
     * when a track is started.
     * This functions prepares data to show airwires to nearest connecting points (pads)
     * from the current new track to candidates during track creation
     * @param aItemRef = the item connected to the starting point of the new track (track or pad)
     * @param aPosition = the position of the new track end (usually the mouse cursor on grid)
     * @param aInit = true to build full candidate list or false to update data
     * When aInit = false, aItemRef is not used (can be NULL)
     */
    void BuildAirWiresTargetsList( BOARD_CONNECTED_ITEM* aItemRef,
                                   const wxPoint& aPosition, bool aInit );

    /**
     * Function TestForActiveLinksInRatsnest
     * Explores the full rats nest list (which must exist) to determine
     * the ACTIVE links in the full rats nest list
     * When tracks exist between pads, a link can connect 2 pads already connected by a track
     * and the link is said inactive.
     * When a link connects 2 pads not already connected by a track, the link is said active.
     * @param aNetCode = net code to test. If 0, test all nets
     */
    void TestForActiveLinksInRatsnest( int aNetCode );

    /**
     * Function TestConnections
     * tests the connections relative to all nets.
     * <p>
     * This function update the status of the ratsnest ( flag CH_ACTIF = 0 if a connection
     * is found, = 1 else) track segments are assumed to be sorted by net codes.
     * This is the case because when a new track is added, it is inserted in the linked list
     * according to its net code. and when nets are changed (when a new netlist is read)
     * tracks are sorted before using this function.
     * </p>
     */
    void TestConnections();

    /**
     * Function TestNetConnection
     * tests the connections relative to \a aNetCode.  Track segments are assumed to be
     * sorted by net codes.
     * @param aDC Current Device Context
     * @param aNetCode The net code to test
     */
    void TestNetConnection( wxDC* aDC, int aNetCode );

    /**
     * Function RecalculateAllTracksNetcode
     * search connections between tracks and pads and propagate pad net codes to the track
     * segments.
     */
    void RecalculateAllTracksNetcode();

    /* Functions relative to Undo/redo commands:
     */

    /**
     * Function SaveCopyInUndoList (virtual pure)
     * Creates a new entry in undo list of commands.
     * add a picker to handle aItemToCopy
     * @param aItemToCopy = the board item modified by the command to undo
     * @param aTypeCommand = command type (see enum UNDO_REDO_T)
     * @param aTransformPoint = the reference point of the transformation, for
     *                          commands like move
     */
    virtual void SaveCopyInUndoList( BOARD_ITEM* aItemToCopy,
                                     UNDO_REDO_T aTypeCommand,
                                     const wxPoint& aTransformPoint = wxPoint( 0, 0 ) ) = 0;

    /**
     * Function SaveCopyInUndoList (virtual pure, overloaded).
     * Creates a new entry in undo list of commands.
     * add a list of pickers to handle a list of items
     * @param aItemsList = the list of items modified by the command to undo
     * @param aTypeCommand = command type (see enum UNDO_REDO_T)
     * @param aTransformPoint = the reference point of the transformation,
     *                          for commands like move
     */
    virtual void SaveCopyInUndoList( const PICKED_ITEMS_LIST& aItemsList,
                                     UNDO_REDO_T aTypeCommand,
                                     const wxPoint& aTransformPoint = wxPoint( 0, 0 ) ) = 0;


    /** Install the dialog box for layer selection
     * @param aDefaultLayer = Preselection (NB_PCB_LAYERS for "(Deselect)" layer)
     * @param aNotAllowedLayersMask = a layer mask for not allowed layers
     *                            (= 0 to show all layers in use)
     * @param aDlgPosition = position of dialog ( defualt = centered)
     * @return the selected layer id
     */
    LAYER_NUM SelectLayer( LAYER_NUM aDefaultLayer,
                           LAYER_MSK aNotAllowedLayersMask = 0,
                           wxPoint aDlgPosition = wxDefaultPosition );

    /* Display a list of two copper layers to choose a pair of copper layers
     * the layer pair is used to fast switch between copper layers when placing vias
     */
    void SelectCopperLayerPair();

    virtual void SwitchLayer( wxDC* DC, LAYER_NUM layer );

    /**
     * Load applications settings common to PCB draw frame objects.
     *
     * This overrides the base class EDA_DRAW_FRAME::LoadSettings() to
     * handle settings common to the PCB layout application and footprint
     * editor main windows.  It calls down to the base class to load
     * settings common to all drawing frames.  Please put your application
     * settings common to all pcb drawing frames here to avoid having
     * application settings loaded all over the place.
     */
    virtual void LoadSettings();

    bool InvokeDialogGrid();

    /**
     * Save applications settings common to PCB draw frame objects.
     *
     * This overrides the base class EDA_DRAW_FRAME::SaveSettings() to
     * save settings common to the PCB layout application and footprint
     * editor main windows.  It calls down to the base class to save
     * settings common to all drawing frames.  Please put your application
     * settings common to all pcb drawing frames here to avoid having
     * application settings saved all over the place.
     */
    virtual void SaveSettings();

    void OnTogglePolarCoords( wxCommandEvent& aEvent );
    void OnTogglePadDrawMode( wxCommandEvent& aEvent );

    /* User interface update event handlers. */
    void OnUpdateCoordType( wxUpdateUIEvent& aEvent );
    void OnUpdatePadDrawMode( wxUpdateUIEvent& aEvent );
    void OnUpdateSelectGrid( wxUpdateUIEvent& aEvent );
    void OnUpdateSelectZoom( wxUpdateUIEvent& aEvent );

    /**
     * Function SetFastGrid1()
     *
     * Switches grid settings to the 1st "fast" setting predefined by user.
     */
    void SetFastGrid1();

    /**
     * Function SetFastGrid2()
     *
     * Switches grid settings to the 1st "fast" setting predefined by user.
     */
    void SetFastGrid2();

    DECLARE_EVENT_TABLE()
};

#endif  // WX_BASE_PCB_FRAME_H_