GDK Reference Manual
<<< PrevHomeUpNext >>>

Cursors

Cursors — standard and pixmap cursors.

Synopsis


#include <gdk/gdk.h>


struct      GdkCursor;
enum        GdkCursorType;
GdkCursor*  gdk_cursor_new                  (GdkCursorType cursor_type);
GdkCursor*  gdk_cursor_new_from_pixmap      (GdkPixmap *source,
                                             GdkPixmap *mask,
                                             GdkColor *fg,
                                             GdkColor *bg,
                                             gint x,
                                             gint y);
GdkCursor*  gdk_cursor_new_for_display      (GdkDisplay *display,
                                             GdkCursorType cursor_type);
GdkDisplay* gdk_cursor_get_display          (GdkCursor *cursor);
GdkCursor*  gdk_cursor_ref                  (GdkCursor *cursor);
void        gdk_cursor_unref                (GdkCursor *cursor);
#define     gdk_cursor_destroy


Description

Details

struct GdkCursor

struct GdkCursor
{
  GdkCursorType type;
  guint ref_count;
};

A GdkCursor structure represents a cursor.


enum GdkCursorType

typedef enum
{
  GDK_X_CURSOR 		  = 0,
  GDK_ARROW 		  = 2,
  GDK_BASED_ARROW_DOWN    = 4,
  GDK_BASED_ARROW_UP 	  = 6,
  GDK_BOAT 		  = 8,
  GDK_BOGOSITY 		  = 10,
  GDK_BOTTOM_LEFT_CORNER  = 12,
  GDK_BOTTOM_RIGHT_CORNER = 14,
  GDK_BOTTOM_SIDE 	  = 16,
  GDK_BOTTOM_TEE 	  = 18,
  GDK_BOX_SPIRAL 	  = 20,
  GDK_CENTER_PTR 	  = 22,
  GDK_CIRCLE 		  = 24,
  GDK_CLOCK	 	  = 26,
  GDK_COFFEE_MUG 	  = 28,
  GDK_CROSS 		  = 30,
  GDK_CROSS_REVERSE 	  = 32,
  GDK_CROSSHAIR 	  = 34,
  GDK_DIAMOND_CROSS 	  = 36,
  GDK_DOT 		  = 38,
  GDK_DOTBOX 		  = 40,
  GDK_DOUBLE_ARROW 	  = 42,
  GDK_DRAFT_LARGE 	  = 44,
  GDK_DRAFT_SMALL 	  = 46,
  GDK_DRAPED_BOX 	  = 48,
  GDK_EXCHANGE 		  = 50,
  GDK_FLEUR 		  = 52,
  GDK_GOBBLER 		  = 54,
  GDK_GUMBY 		  = 56,
  GDK_HAND1 		  = 58,
  GDK_HAND2 		  = 60,
  GDK_HEART 		  = 62,
  GDK_ICON 		  = 64,
  GDK_IRON_CROSS 	  = 66,
  GDK_LEFT_PTR 		  = 68,
  GDK_LEFT_SIDE 	  = 70,
  GDK_LEFT_TEE 		  = 72,
  GDK_LEFTBUTTON 	  = 74,
  GDK_LL_ANGLE 		  = 76,
  GDK_LR_ANGLE 	 	  = 78,
  GDK_MAN 		  = 80,
  GDK_MIDDLEBUTTON 	  = 82,
  GDK_MOUSE 		  = 84,
  GDK_PENCIL 		  = 86,
  GDK_PIRATE 		  = 88,
  GDK_PLUS 		  = 90,
  GDK_QUESTION_ARROW 	  = 92,
  GDK_RIGHT_PTR 	  = 94,
  GDK_RIGHT_SIDE 	  = 96,
  GDK_RIGHT_TEE 	  = 98,
  GDK_RIGHTBUTTON 	  = 100,
  GDK_RTL_LOGO 		  = 102,
  GDK_SAILBOAT 		  = 104,
  GDK_SB_DOWN_ARROW 	  = 106,
  GDK_SB_H_DOUBLE_ARROW   = 108,
  GDK_SB_LEFT_ARROW 	  = 110,
  GDK_SB_RIGHT_ARROW 	  = 112,
  GDK_SB_UP_ARROW 	  = 114,
  GDK_SB_V_DOUBLE_ARROW   = 116,
  GDK_SHUTTLE 		  = 118,
  GDK_SIZING 		  = 120,
  GDK_SPIDER		  = 122,
  GDK_SPRAYCAN 		  = 124,
  GDK_STAR 		  = 126,
  GDK_TARGET 		  = 128,
  GDK_TCROSS 		  = 130,
  GDK_TOP_LEFT_ARROW 	  = 132,
  GDK_TOP_LEFT_CORNER 	  = 134,
  GDK_TOP_RIGHT_CORNER 	  = 136,
  GDK_TOP_SIDE 		  = 138,
  GDK_TOP_TEE 		  = 140,
  GDK_TREK 		  = 142,
  GDK_UL_ANGLE 		  = 144,
  GDK_UMBRELLA 		  = 146,
  GDK_UR_ANGLE 		  = 148,
  GDK_WATCH 		  = 150,
  GDK_XTERM 		  = 152,
  GDK_LAST_CURSOR,
  GDK_CURSOR_IS_PIXMAP 	= -1
} GdkCursorType;

The standard cursors available.

GDK_X_CURSOR

GDK_ARROW

GDK_BASED_ARROW_DOWN

GDK_BASED_ARROW_UP

GDK_BOAT

GDK_BOGOSITY

GDK_BOTTOM_LEFT_CORNER

GDK_BOTTOM_RIGHT_CORNER

GDK_BOTTOM_SIDE

GDK_BOTTOM_TEE

GDK_BOX_SPIRAL

GDK_CENTER_PTR

GDK_CIRCLE

GDK_CLOCK

GDK_COFFEE_MUG

GDK_CROSS

GDK_CROSS_REVERSE

GDK_CROSSHAIR

GDK_DIAMOND_CROSS

GDK_DOT

GDK_DOTBOX

GDK_DOUBLE_ARROW

GDK_DRAFT_LARGE

GDK_DRAFT_SMALL

GDK_DRAPED_BOX

GDK_EXCHANGE

GDK_FLEUR

GDK_GOBBLER

GDK_GUMBY

GDK_HAND1

GDK_HAND2

GDK_HEART

GDK_ICON

GDK_IRON_CROSS

GDK_LEFT_PTR

GDK_LEFT_SIDE

GDK_LEFT_TEE

GDK_LEFTBUTTON

GDK_LL_ANGLE

GDK_LR_ANGLE

GDK_MAN

GDK_MIDDLEBUTTON

GDK_MOUSE

GDK_PENCIL

GDK_PIRATE

GDK_PLUS

GDK_QUESTION_ARROW

GDK_RIGHT_PTR

GDK_RIGHT_SIDE

GDK_RIGHT_TEE

GDK_RIGHTBUTTON

GDK_RTL_LOGO

GDK_SAILBOAT

GDK_SB_DOWN_ARROW

GDK_SB_H_DOUBLE_ARROW

GDK_SB_LEFT_ARROW

GDK_SB_RIGHT_ARROW

GDK_SB_UP_ARROW

GDK_SB_V_DOUBLE_ARROW

GDK_SHUTTLE

GDK_SIZING

GDK_SPIDER

GDK_SPRAYCAN

GDK_STAR

GDK_TARGET

GDK_TCROSS

GDK_TOP_LEFT_ARROW

GDK_TOP_LEFT_CORNER

GDK_TOP_RIGHT_CORNER

GDK_TOP_SIDE

GDK_TOP_TEE

GDK_TREK

GDK_UL_ANGLE

GDK_UMBRELLA

GDK_UR_ANGLE

GDK_WATCH

GDK_XTERM

GDK_LAST_CURSOR

GDK_CURSOR_IS_PIXMAP

type of cursors constructed with gdk_cursor_new_from_pixmap().


gdk_cursor_new ()

GdkCursor*  gdk_cursor_new                  (GdkCursorType cursor_type);

Creates a new cursor from the set of builtin cursors for the default display. See gdk_cursor_new_for_display().

To make the cursor invisible, use gdk_cursor_new_from_pixmap() to create a cursor with no pixels in it.

cursor_type :

cursor to create

Returns :

a new GdkCursor


gdk_cursor_new_from_pixmap ()

GdkCursor*  gdk_cursor_new_from_pixmap      (GdkPixmap *source,
                                             GdkPixmap *mask,
                                             GdkColor *fg,
                                             GdkColor *bg,
                                             gint x,
                                             gint y);

Creates a new cursor from a given pixmap and mask. Both the pixmap and mask must have a depth of 1 (i.e. each pixel has only 2 values - on or off). The standard cursor size is 16 by 16 pixels. You can create a bitmap from inline data as in the below example.

Example 6. Creating a custom cursor.

/* This data is in X bitmap format, and can be created with the 'bitmap'
   utility. */
#define cursor1_width 16
#define cursor1_height 16
static unsigned char cursor1_bits[] = {
   0x80, 0x01, 0x40, 0x02, 0x20, 0x04, 0x10, 0x08, 0x08, 0x10, 0x04, 0x20,
   0x82, 0x41, 0x41, 0x82, 0x41, 0x82, 0x82, 0x41, 0x04, 0x20, 0x08, 0x10,
   0x10, 0x08, 0x20, 0x04, 0x40, 0x02, 0x80, 0x01};

static unsigned char cursor1mask_bits[] = {
   0x80, 0x01, 0xc0, 0x03, 0x60, 0x06, 0x30, 0x0c, 0x18, 0x18, 0x8c, 0x31,
   0xc6, 0x63, 0x63, 0xc6, 0x63, 0xc6, 0xc6, 0x63, 0x8c, 0x31, 0x18, 0x18,
   0x30, 0x0c, 0x60, 0x06, 0xc0, 0x03, 0x80, 0x01};


  GdkCursor *cursor;
  GdkPixmap *source, *mask;
  GdkColor fg = { 0, 65535, 0, 0 }; /* Red. */
  GdkColor bg = { 0, 0, 0, 65535 }; /* Blue. */


  source = gdk_bitmap_create_from_data (NULL, cursor1_bits,
					cursor1_width, cursor1_height);
  mask = gdk_bitmap_create_from_data (NULL, cursor1mask_bits,
				      cursor1_width, cursor1_height);
  cursor = gdk_cursor_new_from_pixmap (source, mask, &fg, &bg, 8, 8);
  gdk_pixmap_unref (source);
  gdk_pixmap_unref (mask);


  gdk_window_set_cursor (widget->window, cursor);
source :

the pixmap specifying the cursor.

mask :

the pixmap specifying the mask, which must be the same size as source.

fg :

the foreground color, used for the bits in the source which are 1. The color does not have to be allocated first.

bg :

the background color, used for the bits in the source which are 0. The color does not have to be allocated first.

x :

the horizontal offset of the 'hotspot' of the cursor.

y :

the vertical offset of the 'hotspot' of the cursor.

Returns :

a new GdkCursor.


gdk_cursor_new_for_display ()

GdkCursor*  gdk_cursor_new_for_display      (GdkDisplay *display,
                                             GdkCursorType cursor_type);

Creates a new cursor from the set of builtin cursors. Some useful ones are:

  • GDK_RIGHT_PTR (right-facing arrow)

  • GDK_CROSSHAIR (crosshair)

  • GDK_XTERM (I-beam)

  • GDK_WATCH (busy)

  • GDK_FLEUR (for moving objects)

  • GDK_HAND1 (a right-pointing hand)

  • GDK_HAND2 (a left-pointing hand)

  • GDK_LEFT_SIDE (resize left side)

  • GDK_RIGHT_SIDE (resize right side)

  • GDK_TOP_LEFT_CORNER (resize northwest corner)

  • GDK_TOP_RIGHT_CORNER (resize northeast corner)

  • GDK_BOTTOM_LEFT_CORNER (resize southwest corner)

  • GDK_BOTTOM_RIGHT_CORNER (resize southeast corner)

  • GDK_TOP_SIDE (resize top side)

  • GDK_BOTTOM_SIDE (resize bottom side)

  • GDK_SB_H_DOUBLE_ARROW (move vertical splitter)

  • GDK_SB_V_DOUBLE_ARROW (move horizontal splitter)

To make the cursor invisible, use gdk_cursor_new_from_pixmap() to create a cursor with no pixels in it.

display :

the GdkDisplay for which the cursor will be created

cursor_type :

cursor to create

Returns :

a new GdkCursor


gdk_cursor_get_display ()

GdkDisplay* gdk_cursor_get_display          (GdkCursor *cursor);

Returns the display on which the GdkCursor is defined

cursor :

a GdkCursor.

Returns :

: the GdkDisplay associated to cursor


gdk_cursor_ref ()

GdkCursor*  gdk_cursor_ref                  (GdkCursor *cursor);

Adds a reference to cursor.

cursor :

a GdkCursor

Returns :

Same cursor that was passed in


gdk_cursor_unref ()

void        gdk_cursor_unref                (GdkCursor *cursor);

Removes a reference from cursor, deallocating the cursor if no references remain.

cursor :

a GdkCursor


gdk_cursor_destroy

#define gdk_cursor_destroy             gdk_cursor_unref

Warning

gdk_cursor_destroy is deprecated and should not be used in newly-written code.

Destroys a cursor, freeing any resources allocated for it.

<<< PrevHomeUpNext >>>
FontsWindows