Made i(t)_toggle_alpha command work in thumbnail mode too

Makefile

@@ -1,6 +1,6 @@
 all: sxiv
 
-VERSION = git-20110903
+VERSION = git-20110904
 
 CC = gcc
 DESTDIR =

commands.c

@@ -327,13 +327,12 @@ int i_toggle_antialias(arg_t a) {
 	}
 }
 
-int i_toggle_alpha(arg_t a) {
-	if (mode == MODE_IMAGE) {
-		img.alpha ^= 1;
-		return 1;
-	} else {
-		return 0;
-	}
+int it_toggle_alpha(arg_t a) {
+	img.alpha ^= 1;
+	tns.alpha = img.alpha;
+	if (mode == MODE_THUMB)
+		tns.dirty = 1;
+	return 1;
 }
 
 int it_open_with(arg_t a) {

commands.h

@@ -58,7 +58,7 @@ int i_fit_to_win(arg_t);
 int i_fit_to_img(arg_t);
 int i_rotate(arg_t);
 int i_toggle_antialias(arg_t);
-int i_toggle_alpha(arg_t);
+int it_toggle_alpha(arg_t);
 int it_open_with(arg_t);
 int it_shell_cmd(arg_t);
 

config.h

@@ -105,7 +105,7 @@ static const keymap_t keys[] = {
 	{ False,  XK_greater,       i_rotate,             (arg_t) DIR_RIGHT },
 
 	{ False,  XK_a,             i_toggle_antialias,   (arg_t) None },
-	{ False,  XK_A,             i_toggle_alpha,       (arg_t) None },
+	{ False,  XK_A,             it_toggle_alpha,      (arg_t) None },
 
 	/* open current image with given program: */
 	{ True,   XK_g,             it_open_with,         (arg_t) "gimp" },

thumbs.c

@@ -176,6 +176,7 @@ void tns_init(tns_t *tns, int cnt) {
 
 	tns->cnt = tns->first = tns->sel = 0;
 	tns->cap = cnt;
+	tns->alpha = 1;
 	tns->dirty = 0;
 
 	if ((homedir = getenv("HOME"))) {
@@ -335,6 +336,10 @@ void tns_render(tns_t *tns, win_t *win) {
 		t->x = x + (THUMB_SIZE - t->w) / 2;
 		t->y = y + (THUMB_SIZE - t->h) / 2;
 		imlib_context_set_image(t->im);
+
+		if (imlib_image_has_alpha() && !tns->alpha)
+			win_draw_rect(win, win->pm, t->x, t->y, t->w, t->h, True, 0, win->white);
+
 		imlib_render_image_part_on_drawable_at_size(0, 0, t->w, t->h,
 		                                            t->x, t->y, t->w, t->h);
 		if ((i + 1) % tns->cols == 0) {

thumbs.h

@@ -44,6 +44,7 @@ typedef struct {
 	int rows;
 	int first;
 	int sel;
+	unsigned char alpha;
 	unsigned char dirty;
 } tns_t;