This file contains the implementation of the GTK+ widget CwChessboard. More...

#include "sys.h"
#include <glib-object.h>
#include <math.h>
#include <stdlib.h>
#include <string.h>
#include "CwChessboard-CONST.h"
#include "CwChessboard.h"
#include "CwChessboardCodes.h"

Include dependency graph for CwChessboard.cc:

Go to the source code of this file.

Classes
struct	_CairoColor

struct	_FloatingPiece

struct	_SquareCache

struct	_Arrow

struct	_CwChessboardPrivate

Macros
#define	Dout(channel, output)

#define	DoutFatal(channel, output) do { } while(0)

#define	_GNU_SOURCE

#define	CONST(name, expr) CWCHESSBOARD_CONST_##name

#define	CWCHESSBOARD_DEFINE_INLINE 1

#define	CW_CHESSBOARD_FLOATING_PIECE_INVALIDATE_TARGET 0

#define	CW_CHESSBOARD_FLOATING_PIECE_DOUBLE_BUFFER 1

#define	CW_CHESSBOARD_EXPOSE_ALWAYS_CLEAR_BACKGROUND 1

#define	CW_CHESSBOARD_EXPOSE_DEBUG 0

#define	CW_CHESSBOARD_GET_PRIVATE(obj) (G_TYPE_INSTANCE_GET_PRIVATE((obj), CW_TYPE_CHESSBOARD, CwChessboardPrivate))

#define	number_of_hud_layers 2

Typedefs
typedef gint	BoardIndex

typedef struct _CairoColor	CairoColor

typedef struct _FloatingPiece	FloatingPiece

typedef struct _SquareCache	SquareCache

typedef struct _Arrow	Arrow

Functions
	G_DEFINE_TYPE (CwChessboard, cw_chessboard, GTK_TYPE_DRAWING_AREA)

void	cw_chessboard_default_draw_border (CwChessboard* chessboard)

void	cw_chessboard_default_draw_turn_indicator (CwChessboard* chessboard, gboolean white, gboolean on)

gint	cw_chessboard_default_calc_board_border_width (CwChessboard const* chessboard, gint sside)

gboolean	cw_chessboard_default_draw_hud_square (G_GNUC_UNUSED CwChessboard* chessboard, cairo_t* cr, gint col, gint row, gint sside, guint hud)

void	cw_chessboard_default_draw_hud_layer (CwChessboard* chessboard, cairo_t* cr, gint sside, guint hud)

GtkWidget*	cw_chessboard_new (void)

CwChessboardColorHandle	cw_chessboard_allocate_color_handle_rgb (CwChessboard* chessboard, gdouble red, gdouble green, gdouble blue)

void	cw_chessboard_free_color_handle (CwChessboard* chessboard, CwChessboardColorHandle handle)

void	cw_chessboard_set_marker_color (CwChessboard* chessboard, gint col, gint row, CwChessboardColorHandle mahandle)

CwChessboardColorHandle	cw_chessboard_get_marker_color (CwChessboard* chessboard, gint col, gint row)

void	cw_chessboard_set_marker_thickness (CwChessboard* chessboard, gdouble thickness)

gdouble	cw_chessboard_get_marker_thickness (CwChessboard* chessboard)

void	cw_chessboard_set_marker_level (CwChessboard* chessboard, gboolean below)

void	cw_chessboard_set_background_color (CwChessboard* chessboard, gint col, gint row, CwChessboardColorHandle bghandle)

CwChessboardColorHandle	cw_chessboard_get_background_color (CwChessboard* chessboard, gint col, gint row)

void	cw_chessboard_set_background_colors (CwChessboard* chessboard, CwChessboardColorHandle const* handles)

void	cw_chessboard_get_background_colors (CwChessboard* chessboard, CwChessboardColorHandle* handles)

void	cw_chessboard_set_square (CwChessboard* chessboard, gint col, gint row, CwChessboardCode code)

CwChessboardCode	cw_chessboard_get_square (CwChessboard* chessboard, gint col, gint row)

void	cw_chessboard_set_draw_border (CwChessboard* chessboard, gboolean draw)

gboolean	cw_chessboard_get_draw_border (CwChessboard* chessboard)

void	cw_chessboard_set_flip_board (CwChessboard* chessboard, gboolean flip)

gboolean	cw_chessboard_get_flip_board (CwChessboard* chessboard)

void	cw_chessboard_set_draw_turn_indicators (CwChessboard* chessboard, gboolean draw)

gboolean	cw_chessboard_get_draw_turn_indicators (CwChessboard* chessboard)

void	cw_chessboard_set_active_turn_indicator (CwChessboard* chessboard, gboolean white)

gboolean	cw_chessboard_get_active_turn_indicator (CwChessboard* chessboard)

void	cw_chessboard_set_dark_square_color (CwChessboard* chessboard, GdkColor const* color)

void	cw_chessboard_get_dark_square_color (CwChessboard* chessboard, GdkColor* color)

void	cw_chessboard_set_light_square_color (CwChessboard* chessboard, GdkColor const* color)

void	cw_chessboard_get_light_square_color (CwChessboard* chessboard, GdkColor* color)

void	cw_chessboard_set_border_color (CwChessboard* chessboard, GdkColor const* color)

void	cw_chessboard_get_border_color (CwChessboard* chessboard, GdkColor* color)

void	cw_chessboard_set_white_fill_color (CwChessboard* chessboard, GdkColor const* color)

void	cw_chessboard_get_white_fill_color (CwChessboard* chessboard, GdkColor* color)

void	cw_chessboard_set_white_line_color (CwChessboard* chessboard, GdkColor const* color)

void	cw_chessboard_get_white_line_color (CwChessboard* chessboard, GdkColor* color)

void	cw_chessboard_set_black_fill_color (CwChessboard* chessboard, GdkColor const* color)

void	cw_chessboard_get_black_fill_color (CwChessboard* chessboard, GdkColor* color)

void	cw_chessboard_set_black_line_color (CwChessboard* chessboard, GdkColor const* color)

void	cw_chessboard_get_black_line_color (CwChessboard* chessboard, GdkColor* color)

void	cw_chessboard_set_cursor_color (CwChessboard* chessboard, GdkColor const* color)

void	cw_chessboard_get_cursor_color (CwChessboard* chessboard, GdkColor* color)

void	cw_chessboard_set_cursor_thickness (CwChessboard* chessboard, gdouble thickness)

gdouble	cw_chessboard_get_cursor_thickness (CwChessboard* chessboard)

void	cw_chessboard_show_cursor (CwChessboard* chessboard)

void	cw_chessboard_hide_cursor (CwChessboard* chessboard)

void	cw_chessboard_move_floating_piece (CwChessboard* chessboard, gint handle, gdouble x, gdouble y)

gint	cw_chessboard_add_floating_piece (CwChessboard* chessboard, CwChessboardCode code, gdouble x, gdouble y, gboolean pointer_device)

void	cw_chessboard_remove_floating_piece (CwChessboard* chessboard, gint handle)

CwChessboardCode	cw_chessboard_get_floating_piece (CwChessboard* chessboard, gint handle)

void	cw_chessboard_enable_hud_layer (CwChessboard* chessboard, guint hud)

void	cw_chessboard_disable_hud_layer (CwChessboard* chessboard, guint hud)

gpointer	cw_chessboard_add_arrow (CwChessboard* chessboard, gint begin_col, gint begin_row, gint end_col, gint end_row, GdkColor const* color)

void	cw_chessboard_remove_arrow (CwChessboard* chessboard, gpointer ptr)

void	cw_chessboard_draw_pawn (CwChessboard* chessboard, cairo_t* cr, gdouble x, gdouble y, gdouble scale, gboolean white)

void	cw_chessboard_draw_king (CwChessboard* chessboard, cairo_t* cr, gdouble x, gdouble y, gdouble scale, gboolean white)

void	cw_chessboard_draw_queen (CwChessboard* chessboard, cairo_t* cr, gdouble x, gdouble y, gdouble scale, gboolean white)

void	cw_chessboard_draw_rook (CwChessboard* chessboard, cairo_t* cr, gdouble x, gdouble y, gdouble scale, gboolean white)

void	cw_chessboard_draw_bishop (CwChessboard* chessboard, cairo_t* cr, gdouble x, gdouble y, gdouble scale, gboolean white)

void	cw_chessboard_draw_knight (CwChessboard* chessboard, cairo_t* cr, gdouble x, gdouble y, gdouble scale, gboolean white)

Variables
gint const	squares = 8

gint const	min_sside = 12

Detailed Description

This file contains the implementation of the GTK+ widget CwChessboard.

You can compile this file with C or C++ compiler (just renaming it to .c or .cc should do the trick with most build systems). If you compile it as C source, then you need to generate a file CwChessboard-CONST.h from this file with the following commands: ./gen.sh CwChessboard.c; g++ -o gen gen.cc; ./gen > CwChessboard-CONST.h where the contents of the script 'gen.sh' is:

echo "#include <iostream>" > gen.cc
echo "#include <cmath>" >> gen.cc
echo >> gen.cc
echo "#define CWCHESSBOARD_CONST_(name, expr) expr; \\"
echo "    std::cout << \"#define CWCHESSBOARD_CONST_\" << #name << \" \" << name << std::endl;" >> gen.cc
echo "int main()" >> gen.cc
echo "{" >> gen.cc
mawk 'BEGIN                     { inl=0; } \
    /static .*= CWCHESSBOARD_CONST_\(.*;/    { sub(/^[ \t]+/, ""); printf("  %s\n", $0); inl=0; } \
    //                         { if (inl) { sub(/^[ \t]+/, ""); printf("    %s\n", $0); inl=0; } } \
    /static .*= CWCHESSBOARD_CONST_\([^;]*$/ { sub(/^[ \t]+/, ""); printf("  %s\n", $0); inl=1; }' \
    $1 >> gen.cc
echo "}" >> gen.cc

Definition in file CwChessboard.cc.

Function Documentation

gpointer cw_chessboard_add_arrow	(	CwChessboard*	chessboard,
		gint	begin_col,
		gint	begin_row,
		gint	end_col,
		gint	end_row,
		GdkColor const*	color
	)

Draw an arrow on the board.

Parameters

chessboard	A CwChessboard.
begin_col	The column of the starting square.
begin_row	The row of the starting square.
end_col	The column of the ending square.
end_row	The row of the ending square.
color	The color to draw the arrow in.

Returns: A handle that can be used to remove the arrow again.

See also: cw_chessboard_remove_arrow

Definition at line 2303 of file CwChessboard.cc.

Referenced by cwmm::ChessboardWidget::add_arrow().

gint cw_chessboard_add_floating_piece	(	CwChessboard*	chessboard,
		CwChessboardCode	code,
		gdouble	x,
		gdouble	y,
		gboolean	pointer_device
	)

This function displays a chess piece with code code at widget coordinates (x, y). Half the side of a square will be subtracted from the coordinates passed, and the result truncated, in order to determine where to draw the top-left corner of the piece. The result is that (x, y) is more or less the center of the piece.

Setting pointer_device will cause gdk_window_get_pointer to be called after the next redraw has finished. This is needed to receive the next motion notify event with GDK_POINTER_MOTION_HINT_MASK being used.

There may only be one floating piece related the pointer device at a time. If there is already another floating piece related to the pointer device then the value of pointer_device is ignored.

Parameters

chessboard	A CwChessboard.
code	The code of the chess piece to be drawn.
x	The center x-coordinate of the piece.
y	The center y-coordinate of the piece.
pointer_device	Whether this piece is under the pointer device or not.

Returns: A handle that can be passed to each of the functions below.

See also: cw_chessboard_get_floating_piece, cw_chessboard_remove_floating_piece, cw_chessboard_move_floating_piece

Definition at line 2098 of file CwChessboard.cc.

References empty_square.

Referenced by cwmm::ChessboardWidget::add_floating_piece().

CwChessboardColorHandle cw_chessboard_allocate_color_handle_rgb	(	CwChessboard*	chessboard,
		gdouble	red,
		gdouble	green,
		gdouble	blue
	)

Allocate a new CwChessboardColorHandle. Simultaneous, there can be at most 31 different colors. It is the responsibility of the user to free the colors if they are no longer used.

Parameters

chessboard	A CwChessboard.
red	The red component of the color in the range [0...1].
green	The green component of the color in the range [0...1].
blue	The blue component of the color in the range [0...1].

Returns: A color handle that can be used with cw_chessboard_set_background_color and cw_chessboard_set_marker_color.

See also: cw_chessboard_allocate_color_handle, cw_chessboard_free_color_handle

Definition at line 1645 of file CwChessboard.cc.

Referenced by cwmm::ChessboardWidget::allocate_color_handle_rgb().

gint cw_chessboard_default_calc_board_border_width	(	CwChessboard const*	chessboard,
		gint	sside
	)

This is the default value of CwChessboardClass::calc_board_border_width. The formula used by this default function is MAX(8.0, round(1.0 + (sside - 12) / 25.0) + sside / 3.0).

Parameters

chessboard	A CwChessboard.
sside	The size of one side of a square in pixels.

Returns: The border width in pixels.

See also: CwChessboardClass::calc_board_border_width

Definition at line 1401 of file CwChessboard.cc.

References cw_chessboard_default_draw_hud_square().

void cw_chessboard_default_draw_border ( CwChessboard* chessboard )

This is the default value of CwChessboardClass::draw_border.

Parameters

chessboard A CwChessboard.

Definition at line 750 of file CwChessboard.cc.

Referenced by cwmm::ChessboardWidget::draw_border().

void cw_chessboard_default_draw_hud_layer	(	CwChessboard*	chessboard,
		cairo_t*	cr,
		gint	sside,
		guint	hud
	)

The default CwChessboardClass::draw_hud_layer function. You can restore the default behaviour with:

1 CW_CHESSBOARD_GET_CLASS(chessboard)->draw_hud_layer = cw_chessboard_default_draw_hud_layer;

Parameters

chessboard	A CwChessboard.
cr	The cairo drawing context.
sside	The side of one square in pixels.
hud	The HUD layer (0 or 1).

This function calls CwChessboardClass::draw_hud_square for every square.

Definition at line 1452 of file CwChessboard.cc.

References cwchess::col_mask, cw_chessboard_default_draw_hud_layer(), and cwchess::row_mask.

Referenced by cw_chessboard_default_draw_hud_layer(), and cwmm::ChessboardWidget::draw_hud_layer().

void cw_chessboard_default_draw_turn_indicator	(	CwChessboard*	chessboard,
		gboolean	white,
		gboolean	on
	)

This is the default value of CwChessboardClass::draw_turn_indicator.

Parameters

chessboard	A CwChessboard.
white	TRUE if it's whites indicator.
on	TRUE if the indicator has to be drawn, FALSE if the indicator has to be removed.

Definition at line 838 of file CwChessboard.cc.

References cw_chessboard_disable_hud_layer(), cw_chessboard_enable_hud_layer(), CwChessboard::sside, CwChessboard::top_left_a1_x, and CwChessboard::top_left_a1_y.

Referenced by cwmm::ChessboardWidget::draw_turn_indicator().

void cw_chessboard_disable_hud_layer	(	CwChessboard*	chessboard,
		guint	hud
	)

Disable the HUD layer again. Used resources are returned to the system.

Parameters

chessboard	A CwChessboard.
hud	The HUD layer (0 or 1).

See also: cw_chessboard_enable_hud_layer

Definition at line 2216 of file CwChessboard.cc.

Referenced by cw_chessboard_default_draw_turn_indicator(), and cwmm::ChessboardWidget::disable_hud_layer().

void cw_chessboard_draw_bishop	(	CwChessboard*	chessboard,
		cairo_t*	cr,
		gdouble	x,
		gdouble	y,
		gdouble	sside,
		gboolean	white
	)

This is the default function used by CwChessboard to draw a bishop.

See cw_chessboard_draw_pawn for more details.

Definition at line 3148 of file CwChessboard.cc.

Referenced by cwmm::ChessboardWidget::draw_bishop().

void cw_chessboard_draw_king	(	CwChessboard*	chessboard,
		cairo_t*	cr,
		gdouble	x,
		gdouble	y,
		gdouble	sside,
		gboolean	white
	)

This is the default function used by CwChessboard to draw a king.

See cw_chessboard_draw_pawn for more details.

Definition at line 2475 of file CwChessboard.cc.

Referenced by cwmm::ChessboardWidget::draw_king().

void cw_chessboard_draw_knight	(	CwChessboard*	chessboard,
		cairo_t*	cr,
		gdouble	x,
		gdouble	y,
		gdouble	sside,
		gboolean	white
	)

This is the default function used by CwChessboard to draw a knight.

See cw_chessboard_draw_pawn for more details.

Definition at line 3484 of file CwChessboard.cc.

References cw_chessboard_move_floating_piece(), and CwChessboard::sside.

Referenced by cwmm::ChessboardWidget::draw_knight().

void cw_chessboard_draw_pawn	(	CwChessboard*	chessboard,
		cairo_t*	cr,
		gdouble	x,
		gdouble	y,
		gdouble	sside,
		gboolean	white
	)

This is the default function used by CwChessboard to draw pawns.

If white is set, a white pawn will be drawn. Otherwise a black pawn.

cw_chessboard_draw_pawn is the default function called via a call to CwChessboardClass::draw_piece. It is called every time the chessboard is resized.

The function uses vector graphics (by doing direct calls to cairo), and is therefore capable of drawing the piece in any arbitrary size and uses anti-aliasing.

Parameters

chessboard	A CwChessboard.
cr	The cairo drawing context.
x	The (widget) x-coordinate of the center of the piece.
y	The (widget) y-coordinate of the center of the piece.
sside	The assumed side of a square, in pixels. `chessboard->sside` is ignored, so that this function can be used to draw pieces elsewhere with a different size than what is used on the chessboard.
white	A boolean that determines if a black or white piece is drawn.

Definition at line 2394 of file CwChessboard.cc.

Referenced by cwmm::ChessboardWidget::draw_pawn().

void cw_chessboard_draw_queen	(	CwChessboard*	chessboard,
		cairo_t*	cr,
		gdouble	x,
		gdouble	y,
		gdouble	sside,
		gboolean	white
	)

This is the default function used by CwChessboard to draw a queen.

See cw_chessboard_draw_pawn for more details.

Definition at line 2706 of file CwChessboard.cc.

Referenced by cwmm::ChessboardWidget::draw_queen().

void cw_chessboard_draw_rook	(	CwChessboard*	chessboard,
		cairo_t*	cr,
		gdouble	x,
		gdouble	y,
		gdouble	sside,
		gboolean	white
	)

This is the default function used by CwChessboard to draw a rook.

See cw_chessboard_draw_pawn for more details.

Definition at line 3021 of file CwChessboard.cc.

Referenced by cwmm::ChessboardWidget::draw_rook().

void cw_chessboard_enable_hud_layer	(	CwChessboard*	chessboard,
		guint	hud
	)

Active a HUD layer. HUD 0 lays between the background and the pieces. HUD 1 lays above the pieces. A custom HUD layer can be created by setting CwChessboardClass::draw_hud_layer.

Parameters

chessboard	A CwChessboard.
hud	The HUD layer (0 or 1).

See also: CwChessboardClass::draw_hud_layer, cw_chessboard_disable_hud_layer

Definition at line 2209 of file CwChessboard.cc.

Referenced by cw_chessboard_default_draw_turn_indicator(), and cwmm::ChessboardWidget::enable_hud_layer().

void cw_chessboard_free_color_handle	(	CwChessboard*	chessboard,
		CwChessboardColorHandle	handle
	)

Free up the color handle handle, so it can be reused.

Parameters

chessboard	A CwChessboard.
handle	A color handle as returned by cw_chessboard_allocate_color_handle_rgb or cw_chessboard_allocate_color_handle.

See also: cw_chessboard_allocate_color_handle_rgb, cw_chessboard_allocate_color_handle

Definition at line 1663 of file CwChessboard.cc.

Referenced by cwmm::ChessboardWidget::free_color_handle().

gboolean cw_chessboard_get_active_turn_indicator ( CwChessboard* chessboard )

Get the boolean that detemines which turn indicator is active (blacks or whites).

Parameters

chessboard A CwChessboard.

Returns: TRUE if whites turn indicator is active (independent on whether or not it is being drawn).

See also: cw_chessboard_set_active_turn_indicator

Definition at line 1835 of file CwChessboard.cc.

Referenced by cwmm::ChessboardWidget::get_active_turn_indicator().

CwChessboardColorHandle cw_chessboard_get_background_color	(	CwChessboard*	chessboard,
		gint	col,
		gint	row
	)

Convenience function.

Parameters

chessboard	A CwChessboard.
col	The column of the square.
row	The row of the square.

Returns: The handle that was passed to cw_chessboard_set_background_color for this square, or 0 if the square is not associated with a color handle.

Definition at line 1720 of file CwChessboard.cc.

Referenced by cwmm::ChessboardWidget::get_background_color().

void cw_chessboard_get_background_colors	(	CwChessboard*	chessboard,
		CwChessboardColorHandle*	handles
	)

Fill the array handles with the current color handles.

Parameters

chessboard	A CwChessboard.
handles	The output array. Should be an array of 64 CwChessboardColorHandles.

Definition at line 1734 of file CwChessboard.cc.

Referenced by cwmm::ChessboardWidget::get_background_colors().

void cw_chessboard_get_black_fill_color	(	CwChessboard*	chessboard,
		GdkColor*	color
	)

Retrieve the current fill color of the black chess pieces.

Parameters

chessboard	A CwChessboard.
color	Pointer to the output variable.

See also: cw_chessboard_set_black_fill_color

Definition at line 1938 of file CwChessboard.cc.

Referenced by cwmm::ChessboardWidget::get_black_fill_color().

void cw_chessboard_get_black_line_color	(	CwChessboard*	chessboard,
		GdkColor*	color
	)

Retrieve the current line color of the black chess pieces.

Parameters

chessboard	A CwChessboard.
color	Pointer to the output variable.

See also: cw_chessboard_set_black_line_color

Definition at line 1956 of file CwChessboard.cc.

Referenced by cwmm::ChessboardWidget::get_black_line_color().

void cw_chessboard_get_border_color	(	CwChessboard*	chessboard,
		GdkColor*	color
	)

Retrieve the current color of the border around the chessboard.

Parameters

chessboard	A CwChessboard.
color	Pointer to the output variable.

See also: cw_chessboard_set_border_color

Definition at line 1884 of file CwChessboard.cc.

Referenced by cwmm::ChessboardWidget::get_border_color().

void cw_chessboard_get_cursor_color	(	CwChessboard*	chessboard,
		GdkColor*	color
	)

Get the current cursor color.

Parameters

chessboard	A CwChessboard.
color	Pointer to the output variable.

Definition at line 1973 of file CwChessboard.cc.

Referenced by cwmm::ChessboardWidget::get_cursor_color().

gdouble cw_chessboard_get_cursor_thickness ( CwChessboard* chessboard )

Get the current cursor thickness as fraction of sside.

Parameters

chessboard A CwChessboard.

See also: cw_chessboard_set_cursor_thickness

Definition at line 1989 of file CwChessboard.cc.

Referenced by cwmm::ChessboardWidget::get_cursor_thickness().

void cw_chessboard_get_dark_square_color	(	CwChessboard*	chessboard,
		GdkColor*	color
	)

Retrieve the current background color of the dark squares.

Parameters

chessboard	A CwChessboard.
color	Pointer to the output variable.

See also: cw_chessboard_set_dark_square_color

Definition at line 1849 of file CwChessboard.cc.

Referenced by cwmm::ChessboardWidget::get_dark_square_color().

gboolean cw_chessboard_get_draw_border ( CwChessboard* chessboard )

Get the boolean that determines whether or not the chessboard widget draws a border around the chessboard.

Parameters

chessboard A CwChessboard.

Returns: TRUE if the border is being drawn.

See also: cw_chessboard_set_draw_border

Definition at line 1773 of file CwChessboard.cc.

Referenced by cwmm::ChessboardWidget::get_draw_border().

gboolean cw_chessboard_get_draw_turn_indicators ( CwChessboard* chessboard )

Get the boolean that determines whether or not turn indicators are being drawn.

Parameters

chessboard A CwChessboard.

Returns: TRUE if turn indicators are being drawn.

See also: cw_chessboard_set_draw_turn_indicators

Definition at line 1815 of file CwChessboard.cc.

Referenced by cwmm::ChessboardWidget::get_draw_turn_indicators().

gboolean cw_chessboard_get_flip_board ( CwChessboard* chessboard )

Get the boolean which determines whether white is playing bottom up or top down.

Parameters

chessboard A CwChessboard.

Returns: FALSE if white plays upwards and TRUE if white plays downwards.

See also: cw_chessboard_set_flip_board

Definition at line 1796 of file CwChessboard.cc.

Referenced by cwmm::ChessboardWidget::get_flip_board().

CwChessboardCode cw_chessboard_get_floating_piece	(	CwChessboard*	chessboard,
		gint	handle
	)

Get the CwChessboardCode of the floating piece represented by handle. handle must be a handle as returned by cw_chessboard_add_floating_piece.

Parameters

chessboard	A CwChessboard.
handle	The floating piece handle.

Definition at line 2203 of file CwChessboard.cc.

Referenced by cwmm::ChessboardWidget::get_floating_piece().

void cw_chessboard_get_light_square_color	(	CwChessboard*	chessboard,
		GdkColor*	color
	)

Retrieve the current background color of the light squares.

Parameters

chessboard	A CwChessboard.
color	Pointer to the output variable.

See also: cw_chessboard_set_light_square_color

Definition at line 1866 of file CwChessboard.cc.

Referenced by cwmm::ChessboardWidget::get_light_square_color().

CwChessboardColorHandle cw_chessboard_get_marker_color	(	CwChessboard*	chessboard,
		gint	col,
		gint	row
	)

Convenience function.

Parameters

chessboard	A CwChessboard.
col	The column of the square.
row	The row of the square.

Returns: The handle that was passed to cw_chessboard_set_marker_color for this square, or 0 if the square doesn't have a marker.

Definition at line 1686 of file CwChessboard.cc.

Referenced by cwmm::ChessboardWidget::get_marker_color().

gdouble cw_chessboard_get_marker_thickness ( CwChessboard* chessboard )

Get the current marker thickness as fraction of sside.

Parameters

chessboard A CwChessboard.

See also: cw_chessboard_set_marker_thickness

Definition at line 1699 of file CwChessboard.cc.

Referenced by cwmm::ChessboardWidget::get_marker_thickness().

CwChessboardCode cw_chessboard_get_square	(	CwChessboard*	chessboard,
		gint	col,
		gint	row
	)

Get the chess piece code for the square at (col, row).

Definition at line 1755 of file CwChessboard.cc.

Referenced by cwmm::ChessboardWidget::get_square().

void cw_chessboard_get_white_fill_color	(	CwChessboard*	chessboard,
		GdkColor*	color
	)

Retrieve the current fill color of the white chess pieces.

Parameters

chessboard	A CwChessboard.
color	Pointer to the output variable.

See also: cw_chessboard_set_white_fill_color

Definition at line 1902 of file CwChessboard.cc.

Referenced by cwmm::ChessboardWidget::get_white_fill_color().

void cw_chessboard_get_white_line_color	(	CwChessboard*	chessboard,
		GdkColor*	color
	)

Retrieve the current line color of the white chess pieces.

Parameters

chessboard	A CwChessboard.
color	Pointer to the output variable.

See also: cw_chessboard_set_white_line_color

Definition at line 1920 of file CwChessboard.cc.

Referenced by cwmm::ChessboardWidget::get_white_line_color().

void cw_chessboard_hide_cursor ( CwChessboard* chessboard )

Hide the cursor.

Parameters

chessboard A CwChessboard.

See also: cw_chessboard_show_cursor

Definition at line 2008 of file CwChessboard.cc.

Referenced by cwmm::ChessboardWidget::hide_cursor().

void cw_chessboard_move_floating_piece	(	CwChessboard*	chessboard,
		gint	handle,
		gdouble	x,
		gdouble	y
	)

Move a floating piece with handle handle to the new widget coordinates at (x, y). handle must be a handle as returned by cw_chessboard_add_floating_piece.

Parameters

chessboard	A CwChessboard.
handle	The floating piece handle.
x	The new x coordinate.
y	The new y coordinate.

See also: cw_chessboard_add_floating_piece

Definition at line 2015 of file CwChessboard.cc.

References cw_chessboard_x2col(), and cw_chessboard_y2row().

Referenced by cw_chessboard_draw_knight(), and cwmm::ChessboardWidget::move_floating_piece().

GtkWidget* cw_chessboard_new ( void )

Create a new chessboard widget.

Returns: Newly created CwChessboard.

Definition at line 1639 of file CwChessboard.cc.

void cw_chessboard_remove_arrow	(	CwChessboard*	chessboard,
		gpointer	ptr
	)

Remove a previously added arrow.

Parameters

chessboard	A CwChessboard.
ptr	The arrow handle as returned by cw_chessboard_add_arrow.

Definition at line 2328 of file CwChessboard.cc.

Referenced by cwmm::ChessboardWidget::remove_arrow().

void cw_chessboard_remove_floating_piece	(	CwChessboard*	chessboard,
		gint	handle
	)

Delete the floating piece with handle handle. handle must be a handle as returned by cw_chessboard_add_floating_piece.

Parameters

chessboard	A CwChessboard.
handle	The floating piece handle.

Definition at line 2143 of file CwChessboard.cc.

References cw_chessboard_x2col(), cw_chessboard_y2row(), and empty_square.

Referenced by cwmm::ChessboardWidget::remove_floating_piece().

void cw_chessboard_set_active_turn_indicator	(	CwChessboard*	chessboard,
		gboolean	white
	)

Set the boolean that detemines which turn indicator is active (blacks or whites). If drawing turn indicators is enabled and the color is changed then the old indicator is erased. If the turn indicators are disabled, nothing happens.

Parameters

chessboard	A CwChessboard.
white	TRUE if the white turn indicator should be on (and blacks off).

See also: cw_chessboard_set_draw_turn_indicators

Definition at line 1820 of file CwChessboard.cc.

References cwchess::white.

Referenced by cwmm::ChessboardWidget::set_active_turn_indicator().

void cw_chessboard_set_background_color	(	CwChessboard*	chessboard,
		gint	col,
		gint	row,
		CwChessboardColorHandle	handle
	)

Set the background color of the square at col, row.

Parameters

chessboard	A CwChessboard.
col	The column of the square.
row	The row of the square.
handle	A color handle as returned by cw_chessboard_allocate_color_handle_rgb or cw_chessboard_allocate_color_handle. A handle with a value of 0 means the default background color.

Definition at line 1709 of file CwChessboard.cc.

Referenced by cw_chessboard_set_background_colors(), and cwmm::ChessboardWidget::set_background_color().

void cw_chessboard_set_background_colors	(	CwChessboard*	chessboard,
		CwChessboardColorHandle const*	handles
	)

Set new background colors of any number of squares.

Parameters

chessboard	A CwChessboard.
handles	Array of 64 CwChessboardColorHandles. A handle with a value of 0 means the default background color.

Definition at line 1725 of file CwChessboard.cc.

References cw_chessboard_set_background_color().

Referenced by cwmm::ChessboardWidget::set_background_colors().

void cw_chessboard_set_black_fill_color	(	CwChessboard*	chessboard,
		GdkColor const*	color
	)

Set the fill color of the black chess pieces. Default: black

Parameters

chessboard	A CwChessboard.
color	The new fill color of the black pieces.

Definition at line 1928 of file CwChessboard.cc.

Referenced by cwmm::ChessboardWidget::set_black_fill_color().

void cw_chessboard_set_black_line_color	(	CwChessboard*	chessboard,
		GdkColor const*	color
	)

Set the line color of the black chess pieces. Default: white

Parameters

chessboard	A CwChessboard.
color	The new line color of the black pieces.

Definition at line 1946 of file CwChessboard.cc.

Referenced by cwmm::ChessboardWidget::set_black_line_color().

void cw_chessboard_set_border_color	(	CwChessboard*	chessboard,
		GdkColor const*	color
	)

Set the color of the border around the chessboard.

Parameters

chessboard	A CwChessboard.
color	The new color of the border.

See also: cw_chessboard_get_border_color, cw_chessboard_set_draw_border

Definition at line 1874 of file CwChessboard.cc.

Referenced by cwmm::ChessboardWidget::set_border_color().

void cw_chessboard_set_cursor_color	(	CwChessboard*	chessboard,
		GdkColor const*	color
	)

Set the color of the cursor.

Parameters

chessboard	A CwChessboard.
color	The color to be used for the cursor.

Definition at line 1964 of file CwChessboard.cc.

Referenced by cwmm::ChessboardWidget::set_cursor_color().

void cw_chessboard_set_cursor_thickness	(	CwChessboard*	chessboard,
		gdouble	thickness
	)

Set the cursor thickness. This is a value between 0 and 0.5.

Parameters

chessboard	A CwChessboard.
thickness	The thickness of the cursor as fraction of sside. Range [0...0.5]

See also: cw_chessboard_get_cursor_thickness

Definition at line 1981 of file CwChessboard.cc.

Referenced by cwmm::ChessboardWidget::set_cursor_thickness().

void cw_chessboard_set_dark_square_color	(	CwChessboard*	chessboard,
		GdkColor const*	color
	)

Set the background color of the dark squares (a1, c1 etc). Default: light green.

Parameters

chessboard	A CwChessboard.
color	The new color of the dark squares.

Definition at line 1840 of file CwChessboard.cc.

Referenced by cwmm::ChessboardWidget::set_dark_square_color().

void cw_chessboard_set_draw_border	(	CwChessboard*	chessboard,
		gboolean	draw
	)

Set the boolean which determines whether or not the chessboard widget draws a border around the chessboard. Default: TRUE (draw border).

Parameters

chessboard	A CwChessboard.
draw	Boolean, determining if the border should be drawn.

See also: CwChessboardClass::calc_board_border_width, CwChessboardClass::draw_border

Definition at line 1763 of file CwChessboard.cc.

Referenced by cwmm::ChessboardWidget::set_draw_border().

void cw_chessboard_set_draw_turn_indicators	(	CwChessboard*	chessboard,
		gboolean	draw
	)

Set the boolean which determines whether or not to draw turn indicators. Indicators will only be drawn if also the border is drawn. Default: TRUE (draw indicators).

Parameters

chessboard	A CwChessboard.
draw	Boolean, determining if the indicators should be drawn.

See also: cw_chessboard_set_draw_border, CwChessboardClass::draw_turn_indicator

Definition at line 1801 of file CwChessboard.cc.

Referenced by cwmm::ChessboardWidget::set_draw_turn_indicators().

void cw_chessboard_set_flip_board	(	CwChessboard*	chessboard,
		gboolean	flip
	)

Set the boolean which determines whether white is playing bottom up or top down. Default: FALSE (white plays upwards).

Parameters

chessboard	A CwChessboard.
flip	Boolean, determining if white plays upwards or not.

Definition at line 1778 of file CwChessboard.cc.

References CwChessboard::flip_board.

Referenced by cwmm::ChessboardWidget::set_flip_board().

void cw_chessboard_set_light_square_color	(	CwChessboard*	chessboard,
		GdkColor const*	color
	)

Set the background color of the light squares (b1, d1 etc). Default: yellow/white.

Parameters

chessboard	A CwChessboard.
color	The new color of the light squares.

Definition at line 1857 of file CwChessboard.cc.

Referenced by cwmm::ChessboardWidget::set_light_square_color().

void cw_chessboard_set_marker_color	(	CwChessboard*	chessboard,
		gint	col,
		gint	row,
		CwChessboardColorHandle	mahandle
	)

Add (or remove) a marker to the square at col, row.

Parameters

chessboard	A CwChessboard.
col	The column of the square.
row	The row of the square.
mahandle	A color handle as returned by cw_chessboard_allocate_color_handle_rgb or cw_chessboard_allocate_color_handle. A handle with a value of 0 means the default background color.

Definition at line 1674 of file CwChessboard.cc.

Referenced by cwmm::ChessboardWidget::set_marker_color().

void cw_chessboard_set_marker_level	(	CwChessboard*	chessboard,
		gboolean	below
	)

Choose whether markers should be drawn below or above HUD layer 0.

Markers can be drawn directly below or directly above HUD layer 0.

Parameters

chessboard	A CwChessboard.
below	TRUE when markers should be drawn below HUD layer 0.

Definition at line 1704 of file CwChessboard.cc.

Referenced by cwmm::ChessboardWidget::set_marker_level().

void cw_chessboard_set_marker_thickness	(	CwChessboard*	chessboard,
		gdouble	thickness
	)

Set the marker thickness. This is a value between 0 and 0.5.

Parameters

chessboard	A CwChessboard.
thickness	The thickness of the marker as fraction of sside. Range [0...0.5]

See also: cw_chessboard_get_marker_thickness

Definition at line 1691 of file CwChessboard.cc.

Referenced by cwmm::ChessboardWidget::set_marker_thickness().

void cw_chessboard_set_square	(	CwChessboard*	chessboard,
		gint	col,
		gint	row,
		CwChessboardCode	code
	)

Change or remove the piece on the square (col, row), by replacing the contents of the square with code. This does not change any other attribute of the square, like it's background color or marker.

Parameters

chessboard	A CwChessboard.
col	A column [0..7]
row	A row [0..7]
code	A CwChessboardCode.

Definition at line 1741 of file CwChessboard.cc.

Referenced by cwmm::ChessboardWidget::set_square().

void cw_chessboard_set_white_fill_color	(	CwChessboard*	chessboard,
		GdkColor const*	color
	)

Set the fill color of the white chess pieces. Default: white

Parameters

chessboard	A CwChessboard.
color	The new fill color of the white pieces.

Definition at line 1892 of file CwChessboard.cc.

Referenced by cwmm::ChessboardWidget::set_white_fill_color().

void cw_chessboard_set_white_line_color	(	CwChessboard*	chessboard,
		GdkColor const*	color
	)

Set the line color of the white chess pieces. Default: black

Parameters

chessboard	A CwChessboard.
color	The new line color of the white pieces.

Definition at line 1910 of file CwChessboard.cc.

Referenced by cwmm::ChessboardWidget::set_white_line_color().

void cw_chessboard_show_cursor ( CwChessboard* chessboard )

Show the cursor.

This high-lights the square under the mouse by drawing a square with a configurable thickness and color.

Parameters

chessboard A CwChessboard.

See also: cw_chessboard_set_cursor_thickness, cw_chessboard_get_cursor_thickness

Definition at line 1994 of file CwChessboard.cc.

Referenced by cwmm::ChessboardWidget::show_cursor().

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