From: John Tsiombikas <nuclear@member.fsf.org>
Date: Mon, 22 Nov 2021 23:35:19 +0000 (+0200)
Subject: theme
X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?p=windtk;a=commitdiff_plain;h=b012c112e391964e63247dcbb55988855b0fc95e

theme
---

diff --git a/src/widget.h b/src/widget.h
index 0a978cf..c174f43 100644
--- a/src/widget.h
+++ b/src/widget.h
@@ -16,11 +16,13 @@ struct wt_widget {
 	wt_callback_func cb[WT_NUM_CALLBACKS];
 	void *cbcls[WT_NUM_CALLBACKS];
 
-	void (*draw)(struct wt_widget *w);
+	wt_draw_func draw;
 	void (*click)(struct wt_widget *w);
 	void (*keypress)(struct wt_widget *w, int key);
 	void (*mbutton)(struct wt_widget *w, int bn, int st, int x, int y);
 	void (*mmotion)(struct wt_widget *w, int x, int y);
+
+	void (*use_theme)(struct wt_widget *w, struct wt_theme *theme);
 };
 
 #endif	/* WIDGET_H_ */
diff --git a/src/window.c b/src/window.c
index a103ed4..d0d8d74 100644
--- a/src/window.c
+++ b/src/window.c
@@ -1,6 +1,7 @@
 #include "wtimpl.h"
 
-static void draw_win(wt_widget *w);
+static void draw_win(wt_widget *w, struct wt_graphics *gfx);
+static void use_theme(wt_widget *w, struct wt_theme *theme);
 
 wt_widget *wt_window(wt_widget *par, const char *title, int style, int x, int y, int xsz, int ysz)
 {
@@ -15,12 +16,17 @@ wt_widget *wt_window(wt_widget *par, const char *title, int style, int x, int y,
 	wt_resize(w, xsz, ysz);
 	/* TODO: style */
 
-	w->draw = draw_win;
+	use_theme(w, wt->theme);
 	return w;
 }
 
-static void draw_win(wt_widget *w)
+static void draw_win(wt_widget *w, struct wt_graphics *gfx)
 {
 	wt_gfx_color(COL_BG);
 	wt_gfx_fillrect(&w->rect);
 }
+
+static void use_theme(wt_widget *w, struct wt_theme *theme)
+{
+	w->draw = theme && theme->draw_window ? theme->draw_window : draw_win;
+}
diff --git a/src/windtk.c b/src/windtk.c
index ea916c3..d6b4d64 100644
--- a/src/windtk.c
+++ b/src/windtk.c
@@ -57,6 +57,34 @@ void wt_destroy(void)
 	wt->root = 0;
 }
 
+struct wt_theme *wt_load_theme(const char *path)
+{
+	return 0;	/* TODO */
+}
+
+void wt_unload_theme(struct wt_theme *theme)
+{
+}
+
+static void use_theme(wt_widget *w, struct wt_theme *theme)
+{
+	int i;
+
+	if(w->use_theme) {
+		w->use_theme(w, theme);
+	}
+
+	for(i=0; i<w->num_child; i++) {
+		use_theme(w->child[i], theme);
+	}
+}
+
+void wt_use_theme(struct wt_theme *theme)
+{
+	wt->theme = theme;
+	use_theme(wt->root, theme);
+}
+
 void wt_viewport(int x, int y, int w, int h)
 {
 	wt_setrect(&wt->vp, x, y, w, h);
@@ -96,7 +124,7 @@ void wt_draw_tree(wt_widget *tree)
 	int i;
 
 	if(tree->draw) {
-		tree->draw(tree);
+		tree->draw(tree, &wt->gfx);
 	}
 
 	for(i=0; i<tree->num_child; i++) {
diff --git a/src/windtk.h b/src/windtk.h
index 6b6724c..56535c9 100644
--- a/src/windtk.h
+++ b/src/windtk.h
@@ -68,11 +68,29 @@ struct wt_graphics {
 	int (*baseline)(int font);
 };
 
+typedef void (*wt_draw_func)(wt_widget*, struct wt_graphics*);
+
+struct wt_theme {
+	char *name;
+	void *so;
+	wt_draw_func draw_window;
+	wt_draw_func draw_label;
+	wt_draw_func draw_button;
+	wt_draw_func draw_checkbox;
+	wt_draw_func draw_textfield;
+
+	struct wt_theme *next;
+};
+
 void wt_allocator(void *(*allocfunc)(size_t), void (*freefunc)(void*));
 
 int wt_init(int w, int h, struct wt_graphics *gfx);
 void wt_destroy(void);
 
+struct wt_theme *wt_load_theme(const char *path);	/* load dynamically, where applicable */
+void wt_unload_theme(struct wt_theme *theme);
+void wt_use_theme(struct wt_theme *theme);
+
 void wt_viewport(int x, int y, int w, int h);
 void wt_graphics(struct wt_graphics *gfx);
 
diff --git a/src/wtimpl.h b/src/wtimpl.h
index d9f3410..f4956ac 100644
--- a/src/wtimpl.h
+++ b/src/wtimpl.h
@@ -26,6 +26,7 @@ struct wt_context {
 	struct wt_graphics gfx;
 	struct wt_rect vp;
 	wt_widget *root;
+	struct wt_theme *theme;
 
 	int colors[NUM_COLORS];
 };