Question

来自gdkCursorNewFromPixmap的示例代码在Ubuntu上导致错误，R 2.14.1和RGtk2 2.20.25

代码：

library(RGtk2)

# 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 <- gdkPixmapNew(NULL, cursor1_width, cursor1_height, 8) 
 mask <- gdkPixmapNew(NULL, cursor1_width, cursor1_height, 8) 
 cursor <- gdkCursorNewFromPixmap(source, mask, fg, bg,0,0 )

错误：

Error in checkPtrType(source, "GdkPixmap") : 
  object of class GdkBitmap, RGtkObject isn't a GdkPixmap
Calls: gdkCursorNewFromPixmap -> checkPtrType

Answer 1

归结为GdkPixmap不等于GdkBitmap，使用gtk_pixmap_new代替gtk_bitmap_create_from_data（不推荐使用btw）（根据R namsing约定进行调整）< / p>

gdkCursorNewFromPixmap示例错误

1 个答案: