ugBASIC 1.18
An isomorphic BASIC language compiler for retrocomputers
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on_scroll_call.c
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1/*****************************************************************************
2 * ugBASIC - an isomorphic BASIC language compiler for retrocomputers *
3 *****************************************************************************
4 * Copyright 2021-2026 Marco Spedaletti (asimov@mclink.it)
5 *
6 * Licensed under the Apache License, Version 2.0 (the "License");
7 * you may not use this file except in compliance with the License.
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10 * http://www.apache.org/licenses/LICENSE-2.0
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13 * distributed under the License is distributed on an "AS IS" BASIS,
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20 * Licenza. Una copia della Licenza è disponibile all'indirizzo:
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22 * http://www.apache.org/licenses/LICENSE-2.0
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30
31/****************************************************************************
32 * INCLUDE SECTION
33 ****************************************************************************/
34
35#include "../../ugbc.h"
36
37/****************************************************************************
38 * CODE SECTION
39 ****************************************************************************/
40
50/* <usermanual>
51@keyword ON SCROLL...CALL
52
53@english
54This command is used to force a procedure call
55when the screen is scrolled down by an entire row or column.
56
57Important: this command does not follow the ''OPTION CALL AS GOTO'' pragma.
58
59@italian
60Questo comando viene utilizzato per forzare la chiamata
61a una procedura, laddove lo schermo sia fatto scorrere
62da una intera riga o colonna.
63
64Importante: questo comando non segue il pragma ''OPTION CALL AS GOTO''.
65
66@syntax ON SCROLL UP ROW CALL label
67@syntax ON SCROLL DOWN ROW CALL label
68@syntax ON SCROLL LEFT COLUMN CALL label
69@syntax ON SCROLL RIGHT COLUMN CALL label
70
71@example ON SCROLL UP ROW CALL scrolledAway
72
73@target all
74</usermanual> */
75void on_scroll_call( Environment * _environment, int _x, int _y, char * _label ) {
76
77 if ( !procedure_exists( _environment, _label ) ) {
79 }
80
81 on_scroll_gosub( _environment, _x, _y, _label );
82
83}
84
int procedure_exists(Environment *_environment, char *_name)
void on_scroll_call(Environment *_environment, int _x, int _y, char *_label)
Emit ASM code for ON SCROLL ... CALL ....
void on_scroll_gosub(Environment *_environment, int _x, int _y, char *_label)
Emit ASM code for ON ... GOSUB ....
struct _Environment Environment
Structure of compilation environment.
#define CRITICAL_ON_SCROLL_CALL_WITH_NOT_EXISTENT_PROCEDURE(s)
Definition ugbc.h:3794