Moving block example

Simple example to draw a block to window which follows mouse movement. Nothing really interesting here.

Compilation

Easiest way to get this example running is to go to examples directory in package root, and run:

$ ./build.sh gui_draw_block

build.sh script compiles Ano script to C, copies source files in place and pops up instructions what to do next. Follow them. Check also examples/README for more info.

Preview

; ------------------------------------------------------------------------------
; gui_draw_block.ano
;
; To compile:
;
; $ ./build/ano ./examples/gui_draw_block/gui_draw_block.ano > \
;     engine/dsl_ano.h
; ------------------------------------------------------------------------------
;
; @ANO_SCRIPT_NAME		gui_draw_block
; @ANO_SCRIPT_VERSION		0.0.1
; @ANO_SCRIPT_DESCRIPTION	Simple thread drawing moving block
;
; @ANO_FLAGS_USE_PROTOS		[ ]
; @ANO_FLAGS_VAR_NAME_SUBS	[ ]
; @ANO_FLAGS_VAR_WARN_UNUSED	[ ]
;
; Copyright © 2016-2026, Jani Salonen <salojan@goto10.co>
; All rights reserved.
;
; Example to draw a block to window which follows mouse movement. Nothing
; really interesting here.
;

main {
	; Global pre-initialized variables.
	;
	mov	color ("cyanwhite")

	mov	pos_x ([int] 0)
	mov	pos_y ([int] 0)
	mov	set_w ([int] 64)
	mov	set_h ([int] 64)

	; Initialize windowing system…
	;
	gui_enabled {
		window_init

		; …and open main window.
		;
		window_open (\
			title_name:		"Drawing window", \
			title_charset:		NULL, \
			flags:			0, \
			parent_handle:		NOPARENT, \
			widget_stack_id:	NOWIDGET, \
			widget_set:		0, \
			window_refresh_divider:	ACTIVE_REFRESH, \
			position_x:		POS_CENTERED, \
			position_y:		POS_CENTERED, \
			size_width:		600, \
			size_height:		300, \
			cb_main_loop:		"cb_mainloop", \
			cb_expose:		NULL, \
			cb_key_press:		NULL, \
			cb_key_release:		NULL, \
			cb_button_press:	NULL, \
			cb_button_release:	NULL, \
			cb_client_message:	NULL, \
			cb_save_yourself:	NULL, \
			cb_configure_notify:	NULL, \
			cb_destroy_notify:	"cb_destroy", \
			cb_motion_notify:	"cb_motion", \
			cb_map_notify:		NULL, \
			cb_unmap_notify:	NULL, \
			cb_open_notify:		"cb_open")
	}

	; No exit here as callbacks are taking over when main process is done.
}

_WINCB_MAINLOOP_ callback cb_mainloop (_hnd) {
	; Clear window…
	;
	draw_wipe (_hnd)

	; …and draw simple block where the pointer is.
	;
	draw_set (_hnd, \
		pos_x, pos_y, pos_x + set_w, pos_y + set_h, color)
}

_WINCB_OPEN_ callback cb_open (_hnd) {
	_hnd.map()
}

_WINCB_DESTROY_ callback cb_destroy (_hnd) {
	_hnd.destroy()

	exit
}

_WINCB_MOTION_ callback cb_motion (_hnd, \
	_x, _y, _x_root, _y_root, _state, _detail) {

	; Update block coordinates.
	;
	mov	pos_x (_x - (set_w / 2))
	mov	pos_y (_y - (set_h / 2))
}

; ------------------------------------------------------------------------------
; gui_draw_block.w2c
;
; To compile:
;
; $ ./build/widget ./examples/gui_draw_block/gui_draw_block.w2c > \
;     engine/widget_defs.h
; ------------------------------------------------------------------------------

; ------------------------------------------------------------------------------
; gui_draw_block.m2c
;
; To compile:
;
; $ ./build/menu ./examples/gui_draw_block/gui_draw_block.m2c > \
;     engine/menu_defs.h
; ------------------------------------------------------------------------------