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API skeleton (structs and initial function prototypes)

Dario Rodriguez authored on 22/03/2022 19:08:40
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Makefile
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+CC=gcc
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+CFLAGS=-Wall -g
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+LDFLAGS=
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+
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+all: widgetlib.o
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+
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+widgetlib.o: widgetlib.c widgetlib.h
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+	$(CC) $(CFLAGS) -c widgetlib.c -o widgetlib.o
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+
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+clean:
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+	rm -f widgetlib.o
widgetlib.c
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+/*
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+ * widgetlib.c
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+ *
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+ * UI toolkit for C modelled after Tk
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+ *
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+ * Author: Dario Rodriguez antartica@whereismybit.com
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+ * This program in licensed under the terms of the MIT/X license.
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+ */
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+
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+#include "widgetlib.h"
widgetlib.h
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+/*
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+ * widgetlib.h
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+ *
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+ * UI toolkit for C modelled after Tk
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+ *
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+ * HEADER FILE
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+ *
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+ * Author: Dario Rodriguez antartica@whereismybit.com
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+ * This program in licensed under the terms of the MIT/X license.
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+ */
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+
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+#ifndef WIDGETLIB_H
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+#define WIDGETLIB_H
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+
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+#include <stdarg.h>
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+
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+typedef struct xywh_t {
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+        int x;
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+        int y;
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+        int w;
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+        int h;
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+} xywh_t;
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+
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+typedef struct wh_t {
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+        int w;
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+        int h;
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+} wh_t;
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+
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+typedef enum wianchor_t {
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+        anchor_center=0,
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+        anchor_nw,
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+        anchor_n,
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+        anchor_ne,
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+        anchor_w,
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+        anchor_e,
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+        anchor_sw,
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+        anchor_s,
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+        anchor_se,
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+} wianchor_t;
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+
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+typedef enum wifill_t {
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+        fill_none=0,
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+        fill_x,
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+        fill_y,
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+        fill_both,
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+} wifill_t;
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+
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+typedef struct wiplace_t {
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+        int enabled;
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+        xywh_t xywh;
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+        int flag_whfromparent;
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+} wiplace_t;
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+
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+typedef struct wiconf_t {
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+        char *name;
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+        int sizevalue;
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+        int usedvalue;
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+        char *value;
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+        int flag_var; /* value contains autovarname */
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+        int flag_image; /* images are also vars (flag_var should also be set) */
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+        wh_t image;
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+        void (*callback)(void *wi, char *toplevelname, char *widgetname, char *confname);
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+} wiconf_t;
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+
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+typedef struct widget_t {
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+        int sizename;
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+        int usedname;
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+        char *name;
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+        char *classname;
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+        int sizeclassdata;
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+        char *classdata;
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+        wiplace_t place;
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+        xywh_t box;
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+        xywh_t padipadbox;
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+        xywh_t displaybox;
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+        int pad_left;
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+        int pad_right;
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+        int pad_top;
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+        int pad_bottom;
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+        int ipad_left;
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+        int ipad_right;
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+        int ipad_top;
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+        int ipad_bottom;
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+        wianchor_t anchor;
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+        wifill_t fill;
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+        int sizeconfs;
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+        int usedconfs;
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+        wiconf_t **confs;
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+} widget_t;
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+
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+typedef struct witoplevel_t {
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+        char *toplevelname;
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+        widget_t rootwidget;
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+        int sizewidgets;
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+        int usedwidgets;
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+        widget_t **widgets;
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+        int sizebufwidgets;
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+        int usedbufwidgets;
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+        widget_t **bufwidgets;
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+        int sizeconfs;
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+        int usedconfs;
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+        wiconf_t **confs;
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+} witoplevel_t;
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+
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+typedef struct wialias_t {
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+        char *alias;
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+        int sizepath;
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+        int usedpath;
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+        char *path;
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+} wialias_t;
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+
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+typedef struct wivar_t {
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+        char *autovarname;
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+        int sizevardata;
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+        int usedvardata;
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+        char *vardata;
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+} wivar_t;
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+
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+typedef enum wiclassoptype_t {
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+        classop_initclass=0,
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+        classop_freeclass,
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+        classop_initinstance,
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+        classop_freeinstance,
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+        classop_render,
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+} wiclassoptype_t;
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+
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+typedef struct wiclassop_t {
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+        wiclassoptype_t op;
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+} wiclassop_t;
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+
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+typedef struct wiclass_t {
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+        char *classname;
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+        int sizeclassglobaldata;
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+        char *classglobaldata;
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+        void (*classcallback)(void *wi, struct wiclass_t *cl, widget_t *widget, wiclassop_t *op);
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+} wiclass_t;
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+
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+typedef struct wi_t {
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+        int sizeclasses;
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+        int usedclasses;
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+        wiclass_t *classes;
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+        int sizetoplevels;
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+        int usedltoplevels;
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+        witoplevel_t *toplevels;
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+        int currenttoplevel;
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+        int sizealiases;
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+        int usedaliases;
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+        wialias_t **aliases;
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+        int sizevars;
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+        int usedvars;
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+        wivar_t **vars;
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+} wi_t;
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+
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+wi_t wi_init(void);
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+void wi_free(wi_t *wi);
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+
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+int wi_class_register(wi_t *wi, char *classname, void (*classcallback)(void *wi, wiclass_t *cl, widget_t *widget, wiclassop_t *op));
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+int wi_class_unregister(wi_t *wi, char *classname);
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+
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+int wi_toplevel_set(wi_t *wi, char *name);
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+int wi_toplevel_destroy(wi_t *wi, char *name);
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+
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+char *wi_add(wi_t *wi, char *debugfile, int debugline, char *class, char *path, char *format,...);
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+char *wi_config(wi_t *wi, char *debugfile, int debugline, char *path, char *format,...);
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+int wi_pack(wi_t *wi, char *debugfile, int debugline, char *path, char *format,...);
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+int wi_destroy(wi_t *wi, char *path);
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+
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+int wi_alias_set(wi_t *wi, char *alias, char *path);
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+int wi_alias_unset(wi_t *wi, char *alias);
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+
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+int wi_tree_move(wi_t *wi, char *path, char *newparent);
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+
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+int wi_var_updated(wi_t *wi, char *vardata, int sizevardata);
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+int wi_var_destroy(wi_t *wi, char *vardata, int sizevardata);
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+
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+#endif
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+