gdkCursorNewFromPixmap: gdkCursorNewFromPixmap

In RGtk2: R Bindings for Gtk 2.8.0 and Above

Description

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.

Usage

gdkCursorNewFromPixmap(source, mask, fg, bg, x, y)

Arguments

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.

Details

Creating a custom cursor

######
# Creating a custom cursor
######

## This data is in X bitmap format, and can be created with the 'bitmap'
## utility in X11
cursor1_width <- 16
cursor1_height <- 16
cursor1_bits <- c(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)
 
cursor1mask_bits <- c(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)
 
fg <- c(65535, 0, 0) # Red.
bg <- c(0, 0, 65535) # Blue.
 
 
source <- gdkBitmapCreateFromData(NULL, cursor1_bits,
                                  cursor1_width, cursor1_height)
mask <- gdkBitmapCreateFromData(NULL, cursor1mask_bits,
                                cursor1_width, cursor1_height)
cursor <- gdkCursorNewFromPixmap(source, mask, fg, bg, 8, 8)

widget[["window"]]$setCursor(cursor)

Value

[GdkCursor] a new GdkCursor.

Author(s)

Derived by RGtkGen from GTK+ documentation

RGtk2 documentation built on Oct. 14, 2021, 5:08 p.m.