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Epsilon User's Manual and Reference >
Primitives and EEL Subroutines >
Input Primitives >
The Mouse >
Mouse Cursors
user short mouse_display;
user short mouse_auto_on; /* default = 1 */
user short mouse_auto_off; /* default = 1 */
The mouse_display primitive controls whether or not Epsilon
displays the mouse cursor. Set it to zero to turn the mouse cursor
off, and to a nonzero value to turn the mouse cursor on. Turning off
the mouse cursor does not cause Epsilon to stop queuing up mouse
events--to do that, use catch_mouse.
Epsilon automatically turns on the mouse cursor when it detects mouse
motion, if the mouse_auto_on primitive has a nonzero value.
Epsilon automatically turns off the mouse when you start to type on
the keyboard, if the mouse_auto_off primitive has a nonzero
value. Neither of these actions affect the status of queuing up
mouse events. When Epsilon automatically turns on the mouse cursor,
it sets mouse_display to 2.
typedef struct mouse_cursor {
byte on_pixels[32];
byte off_pixels[32];
byte hot_x, hot_y;
short stock_cursor;
} MOUSE_CURSOR;
MOUSE_CURSOR *mouse_cursor;
MOUSE_CURSOR std_pointer;
You can select a different mouse cursor in Epsilon for Windows by
setting the mouse_cursor primitive. It points to a
structure of type MOUSE_CURSOR . The MOUSE_CURSOR type
is built into Epsilon. In the current version, only the
stock_cursor member is used. It selects one of several standard
Windows cursors, according to the following table, which lists the
stock cursor codes defined in codes.h:
| CURSOR_ARROW | Standard arrow |
| CURSOR_IBEAM | Text I-beam |
| CURSOR_WAIT | Hourglass |
| CURSOR_CROSS | Crosshair |
| CURSOR_UPARROW | Arrow pointing up |
| CURSOR_SIZE | Resize |
| CURSOR_ICON | Empty icon |
| CURSOR_SIZENWSE | Double-headed arrow pointing northwest and southeast |
| CURSOR_SIZENESW | Double-headed arrow pointing northeast and southwest |
| CURSOR_SIZEWE | Double-headed arrow pointing east and west |
| CURSOR_SIZENS | Double-headed arrow pointing north and south |
| CURSOR_PAN | Neutral cursor for wheeled mouse panning |
| CURSOR_PAN_UP | Wheeled mouse cursor when panning up |
| CURSOR_PAN_DOWN | Wheeled mouse cursor when panning down |
The std_pointer primitive variable contains Epsilon's
standard left-pointing arrow cursor. Use the syntax mouse_cursor =
&some_cursor; to set the cursor to a different MOUSE_CURSOR
variable. In Epsilon for Unix under X11, the panning cursors above
are available, but not the others.
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