Cursors

## Cursors Cursors — Standard and pixmap cursors |

## Synopsis

    #include <gdk/gdk.h>

                        GdkCursor;
    enum                GdkCursorType;
    GdkCursor*          gdk_cursor_new                      (GdkCursorType cursor_type);
    GdkCursor*          gdk_cursor_new_from_pixmap          (GdkPixmap *source,
                                                             GdkPixmap *mask,
                                                             const GdkColor *fg,
                                                             const GdkColor *bg,
                                                             gint x,
                                                             gint y);
    GdkCursor*          gdk_cursor_new_from_pixbuf          (GdkDisplay *display,
                                                             GdkPixbuf *pixbuf,
                                                             gint x,
                                                             gint y);
    GdkCursor*          gdk_cursor_new_from_name            (GdkDisplay *display,
                                                             const gchar *name);
    GdkCursor*          gdk_cursor_new_for_display          (GdkDisplay *display,
                                                             GdkCursorType cursor_type);
    GdkDisplay*         gdk_cursor_get_display              (GdkCursor *cursor);
    GdkPixbuf*          gdk_cursor_get_image                (GdkCursor *cursor);
    GdkCursor*          gdk_cursor_ref                      (GdkCursor *cursor);
    void                gdk_cursor_unref                    (GdkCursor *cursor);
    #define             gdk_cursor_destroy

## Description

These functions are used to create and destroy cursors. There is a number of standard cursors, but it is also possible to construct new cursors from pixmaps and pixbufs. There may be limitations as to what kinds of cursors can be constructed on a given display, see `gdk_display_supports_cursor_alpha()`, `gdk_display_supports_cursor_color()`, `gdk_display_get_default_cursor_size()` and `gdk_display_get_maximal_cursor_size()`.

Cursors by themselves are not very interesting, they must be be bound to a window for users to see them. This is done with `gdk_window_set_cursor()` or by setting the cursor member of the GdkWindowAttr struct passed to `gdk_window_new()`.

## Details

### GdkCursor

    typedef struct {
      GdkCursorType type;
    } GdkCursor;

A GdkCursor structure represents a cursor.

GdkCursorType `type`; | the GdkCursorType of the 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` | last cursor type
`GDK_CURSOR_IS_PIXMAP` | type of cursors constructed with `gdk_cursor_new_from_pixmap()` or `gdk_cursor_new_from_pixbuf()`

### 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,
                                                             const GdkColor *fg,
                                                             const 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_from_pixbuf ()

    GdkCursor*          gdk_cursor_new_from_pixbuf          (GdkDisplay *display,
                                                             GdkPixbuf *pixbuf,
                                                             gint x,
                                                             gint y);

Creates a new cursor from a pixbuf.

Not all GDK backends support RGBA cursors. If they are not supported, a monochrome approximation will be displayed. The functions `gdk_display_supports_cursor_alpha()` and `gdk_display_supports_cursor_color()` can be used to determine whether RGBA cursors are supported; `gdk_display_get_default_cursor_size()` and `gdk_display_get_maximal_cursor_size()` give information about cursor sizes.

On the X backend, support for RGBA cursors requires a sufficently new version of the X Render extension.

`display` : | the GdkDisplay for which the cursor will be created
`pixbuf` : | the GdkPixbuf containing the cursor image
`x` : | the horizontal offset of the 'hotspot' of the cursor.
`y` : | the vertical offset of the 'hotspot' of the cursor.
Returns : | a new GdkCursor.

Since 2.4

### gdk_cursor_new_from_name ()

    GdkCursor*          gdk_cursor_new_from_name            (GdkDisplay *display,
                                                             const gchar *name);

Creates a new cursor by looking up `name` in the current cursor theme.

`display` : | the GdkDisplay for which the cursor will be created
`name` : | the name of the cursor
Returns : | a new GdkCursor, or `NULL` if there is no cursor with the given name

Since 2.8

### 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

Since 2.2

### 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`

Since 2.2

### gdk_cursor_get_image ()

    GdkPixbuf*          gdk_cursor_get_image                (GdkCursor *cursor);

Returns a GdkPixbuf with the image used to display the cursor.

Note that depending on the capabilities of the windowing system and on the cursor, GDK may not be able to obtain the image data. In this case, `NULL` is returned.

`cursor` : | a GdkCursor
Returns : | a GdkPixbuf representing `cursor`, or `NULL`

Since 2.8

### 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.