1 files changed, 131 insertions, 0 deletions
diff --git a/menulist.c b/menulist.c
new file mode 100644
index 0000000..8cd41a8
--- /dev/null
+++ b/menulist.c
@@ -0,0 +1,131 @@
+#include <u.h>
+#include <libc.h>
+#include <thread.h>
+#include <draw.h>
+#include <mouse.h>
+#include <cursor.h>
+#include <keyboard.h>
+#include <geometry.h>
+#include "dat.h"
+#include "fns.h"
+
+enum {
+	Menuborder = 2,
+	Vspace = 2,
+	Scrollwidth = 10,
+	Maxvisitems = 5,
+};
+static char none[] = "none";
+
+
+static void
+menulist_add(Menulist *ml, int id, char *title)
+{
+	Mentry e = {id, title};
+	int ew;
+
+	ml->entries = erealloc(ml->entries, ++ml->nentries * sizeof *ml->entries);
+	ml->entries[ml->nentries-1] = e;
+
+	if((ew = stringwidth(font, e.title)) > Dx(ml->r)){
+		ml->r.min.x = SCRW/2 - ew/2;
+		ml->r.max.x = ml->r.min.x + ew;
+	}
+	if(ml->nentries > 1)
+		ml->r.max.y += font->height+Vspace;
+}
+
+static void
+menulist_clear(Menulist *ml)
+{
+	int i, w;
+
+	if(ml->entries == nil)
+		return;
+
+	for(i = 0; i < ml->nentries; i++)
+		free(ml->entries[i].title);
+	free(ml->entries);
+	ml->entries = nil;
+	ml->nentries = 0;
+	ml->filling = 0;
+
+	w = max(stringwidth(font, ml->title), stringwidth(font, none));
+	ml->r.min.x = SCRW/2 - w/2;
+	ml->r.max = addpt(ml->r.min, Pt(w, font->height+Vspace));
+	ml->sr = ZR;
+	ml->high = -1;
+}
+
+static void
+menulist_update(Menulist *ml, Mousectl *mc)
+{
+	if(ptinrect(mc->xy, ml->r)){
+		/* item highlighting and selection */
+	}else if(ptinrect(mc->xy, ml->sr)){
+		/* scrolling */
+	}
+}
+
+static void
+menulist_draw(Menulist *ml, Image *dst)
+{
+	static Image *bc;
+	Rectangle tr, er; /* title and per-entry */
+	int i;
+
+	if(ml->filling)
+		return;
+
+	if(bc == nil)
+		bc = eallocimage(display, Rect(0,0,1,1), screen->chan, 1, DPurpleblue);
+
+	/* draw title */
+	tr.min = subpt(ml->r.min, Pt(0,Menuborder + font->height+Vspace));
+	tr.max = Pt(ml->r.max.x, ml->r.min.y - Menuborder);
+	draw(dst, tr, display->black, nil, ZP);
+	string(dst, tr.min, display->white, ZP, font, ml->title);
+
+	/* draw content */
+	border(dst, ml->r, -Menuborder, bc, ZP);
+	er.min = ml->r.min;
+	er.max = Pt(ml->r.max.x, er.min.y + font->height+Vspace);
+	for(i = 0; i < ml->nentries; i++){
+		draw(dst, er, display->white, nil, ZP);
+		string(dst, er.min, display->black, ZP, font, ml->entries[i].title);
+		er.min.y += font->height+Vspace;
+		er.max.y = er.min.y + font->height+Vspace;
+	}
+	if(i == 0){
+		draw(dst, er, display->white, nil, ZP);
+		string(dst, er.min, display->black, ZP, font, none);
+	}
+}
+
+Menulist *
+newmenulist(int topmargin, char *title)
+{
+	Menulist *ml;
+	int w;
+
+	ml = emalloc(sizeof *ml);
+	memset(ml, 0, sizeof *ml);
+	ml->title = estrdup(title);
+	w = max(stringwidth(font, title), stringwidth(font, none));
+	ml->r.min = Pt(SCRW/2 - w/2, topmargin);
+	ml->r.max = addpt(ml->r.min, Pt(w, font->height+Vspace));
+	ml->high = -1;
+	ml->add = menulist_add;
+	ml->clear = menulist_clear;
+	ml->update = menulist_update;
+	ml->draw = menulist_draw;
+	return ml;
+}
+
+void
+delmenulist(Menulist *ml)
+{
+	ml->clear(ml);
+	free(ml->title);
+	free(ml);
+}