ref: a1a120547768ee33ddaae4ee1965dfcf85149d8a
dir: /sys/src/libcontrol/menu.c/
#include <u.h>
#include <libc.h>
#include <draw.h>
#include <thread.h>
#include <mouse.h>
#include <keyboard.h>
#include <control.h>
typedef struct Menu0 Menu0; /* Menu is taken by mouse.h */
struct Menu0
{
Control;
CImage *image;
CImage *bordercolor;
CImage *textcolor;
CImage *selectcolor;
CImage *selecttextcolor;
CFont *font;
char **line;
int nline;
int border;
int align;
Image *window;
int visible; /* state of menu */
int selection; /* currently selected line; -1 == none */
int prevsel; /* previous selection */
int lastbut; /* previous state of mouse button */
};
enum{
EAdd,
EAlign,
EBorder,
EBordercolor,
EFocus,
EFont,
EFormat,
EHide,
EImage,
ERect,
EReveal,
ESelectcolor,
ESelecttextcolor,
EShow,
ESize,
ETextcolor,
EWindow,
};
static char *cmds[] = {
[EAdd] = "add",
[EAlign] = "align",
[EBorder] = "border",
[EBordercolor] = "bordercolor",
[EFocus] = "focus",
[EFont] = "font",
[EFormat] = "format",
[EHide] = "hide",
[EImage] = "image",
[ERect] = "rect",
[EReveal] = "reveal",
[ESelectcolor] = "selectcolor",
[ESelecttextcolor] = "selecttextcolor",
[EShow] = "show",
[ESize] = "size",
[ETextcolor] = "textcolor",
[EWindow] = "window",
nil
};
static void menushow(Menu0*);
static void menuhide(Menu0*);
static void
menufree(Control *c)
{
Menu0 *m;
m = (Menu0*)c;
_putctlfont(m->font);
_putctlimage(m->image);
_putctlimage(m->textcolor);
_putctlimage(m->bordercolor);
_putctlimage(m->selectcolor);
_putctlimage(m->selecttextcolor);
}
static void
menushow(Menu0 *m)
{
Rectangle r, clipr;
int i, dx, dy, w;
Font *f;
Point p, q;
Image *im, *c;
if(m->hidden || m->window == nil)
return;
m->visible = 1;
f = m->font->font;
draw(m->window, m->rect, m->image->image, nil, m->image->image->r.min);
if(m->border > 0)
border(m->window, m->rect, m->border, m->bordercolor->image, ZP);
/* text goes here */
dx = 0;
for(i=0; i<m->nline; i++){
w = stringwidth(f, m->line[i]);
if(dx < w)
dx = w;
}
dy = m->nline*f->height;
clipr = insetrect(m->rect, m->border);
p = _ctlalignpoint(clipr, dx, dy, m->align);
im = m->textcolor->image;
// if(m->pressed)
// im = m->pressedtextcolor->image;
for(i=0; i<m->nline; i++){
r.min = p;
r.max.x = p.x+dx;
r.max.y = p.y+f->height;
c = im;
if(i == m->selection){
draw(m->window, r, m->selectcolor->image, nil, ZP);
c = m->selecttextcolor->image;
}
q = _ctlalignpoint(r, stringwidth(f, m->line[i]), f->height, m->align%3);
_string(m->window, q, c,
ZP, f, m->line[i], nil, strlen(m->line[i]),
clipr, nil, ZP, SoverD);
p.y += f->height;
}
// if(m->pressed)
// draw(m->screen, m->rect, m->lighm->image, m->mask->image, m->mask->image->r.min);
flushimage(display, 1);
}
static Point
menusize(Menu0 *m)
{
int x, y;
int i;
Point p;
Font *f;
x = 0;
y = 0;
f = m->font->font;
for(i=0; i<m->nline; i++){
p = stringsize(f, m->line[i]);
if(p.x > x)
x = p.x;
y += f->height;
}
return Pt(x+2*m->border, y+2*m->border);
}
static void
menuhide(Menu0 *m)
{
freeimage(m->window);
m->window = nil;
m->rect.max.y = m->rect.min.y; /* go to zero size */
m->lastbut = 0;
m->visible = 0;
if(m->selection >= 0)
m->prevsel = m->selection;
m->selection = -1;
_ctlfocus(m, 0);
}
static void
menutrack(Control *c, Mouse *ms)
{
Rectangle r;
int s;
Menu0 *m;
m = (Menu0*)c;
if(m->window == nil)
return;
if(m->lastbut && ms->buttons==0){ /* menu was released */
chanprint(m->event, "%q: value %d", m->name, m->selection);
menuhide(m);
return;
}
m->lastbut = ms->buttons;
r = insetrect(m->rect, m->border);
if(!ptinrect(ms->xy, r))
s = -1;
else{
s = (ms->xy.y - r.min.y)/m->font->font->height;
if(s < 0 || s >= m->nline)
s = -1;
}
if(m->visible== 0 || s!=m->selection){
m->selection = s;
menushow(m);
}
}
static void
menuctl(Control *c, CParse *cp)
{
int up, cmd, h;
Rectangle r;
Menu0 *m;
Point diag;
m = (Menu0*)c;
cmd = _ctllookup(cp->args[0], cmds, nelem(cmds));
switch(cmd){
default:
ctlerror("%q: unrecognized message '%s'", m->name, cp->str);
break;
case EAdd:
_ctlargcount(m, cp, 2);
m->line = ctlrealloc(m->line, (m->nline+1)*sizeof(char*));
m->line[m->nline++] = ctlstrdup(cp->args[1]);
menushow(m);
break;
case EAlign:
_ctlargcount(m, cp, 2);
m->align = _ctlalignment(cp->args[1]);
menushow(m);
break;
case EBorder:
_ctlargcount(m, cp, 2);
m->border = cp->iargs[1];
menushow(m);
break;
case EBordercolor:
_ctlargcount(m, cp, 2);
_setctlimage(m, &m->bordercolor, cp->args[1]);
menushow(m);
break;
case EFocus:
_ctlargcount(m, cp, 2);
if(strtol(cp->args[1], 0, 0) == 0)
menuhide(m);
break;
case EFont:
_ctlargcount(m, cp, 2);
_setctlfont(m, &m->font, cp->args[1]);
break;
case EFormat:
_ctlargcount(m, cp, 2);
m->format = ctlstrdup(cp->args[1]);
break;
case EHide:
_ctlargcount(m, cp, 1);
m->hidden = 1;
break;
case EImage:
_ctlargcount(m, cp, 2);
_setctlimage(m, &m->image, cp->args[1]);
menushow(m);
break;
case ERect:
_ctlargcount(m, cp, 5);
r.min.x = cp->iargs[1];
r.min.y = cp->iargs[2];
r.max.x = cp->iargs[3];
r.max.y = cp->iargs[4];
if(Dx(r)<0 || Dy(r)<0)
ctlerror("%q: bad rectangle: %s", m->name, cp->str);
m->rect = r;
menushow(m);
break;
case EReveal:
_ctlargcount(m, cp, 1);
m->hidden = 0;
menushow(m);
break;
case ESelectcolor:
_ctlargcount(m, cp, 2);
_setctlimage(m, &m->selectcolor, cp->args[1]);
menushow(m);
break;
case ESelecttextcolor:
_ctlargcount(m, cp, 2);
_setctlimage(m, &m->selecttextcolor, cp->args[1]);
menushow(m);
break;
case EShow:
_ctlargcount(m, cp, 1);
menushow(m);
break;
case ESize:
if (cp->nargs == 3)
r.max = Pt(0x7fffffff, 0x7fffffff);
else{
_ctlargcount(m, cp, 5);
r.max.x = cp->iargs[3];
r.max.y = cp->iargs[4];
}
r.min.x = cp->iargs[1];
r.min.y = cp->iargs[2];
if(r.min.x<=0 || r.min.y<=0 || r.max.x<=0 || r.max.y<=0 || r.max.x < r.min.x || r.max.y < r.min.y)
ctlerror("%q: bad sizes: %s", m->name, cp->str);
m->size.min = r.min;
m->size.max = r.max;
break;
case ETextcolor:
_ctlargcount(m, cp, 2);
_setctlimage(m, &m->textcolor, cp->args[1]);
menushow(m);
break;
case EWindow:
/* no args == toggle; otherwise 0 or 1 for state of window */
if(cp->nargs >= 2)
up = cp->iargs[1];
else
up = (m->window == nil);
if(!up){ /* take window down */
if(m->window)
menuhide(m);
break;
}
if(m->window != nil)
break;
diag = menusize(m);
m->rect.max.x = m->rect.min.x + diag.x;
m->rect.max.y = m->rect.min.y + diag.y;
m->window = allocwindow(_screen, m->rect, Refbackup, DWhite);
if(m->window == nil)
m->window = m->screen;
up = m->prevsel;
if(up<0 || up>=m->nline)
up = 0;
m->selection = up;
menushow(m);
h = m->font->font->height;
moveto(m->controlset->mousectl,
Pt(m->rect.min.x+Dx(m->rect)/2, m->rect.min.y+up*h+h/2));
// _ctlfocus(m, 1);
break;
}
}
Control*
createmenu(Controlset *cs, char *name)
{
Menu0 *m;
m = (Menu0*)_createctl(cs, "menu", sizeof(Menu0), name);
m->font = _getctlfont("font");
m->image = _getctlimage("white");
m->textcolor = _getctlimage("black");
m->selectcolor = _getctlimage("yellow");
m->selecttextcolor = _getctlimage("black");
m->bordercolor = _getctlimage("black");
m->format = ctlstrdup("%q: value %d");
m->border = 0;
m->align = Aupperleft;
m->visible = 0;
m->window = nil;
m->lastbut = 0;
m->selection = -1;
m->mouse = menutrack;
m->ctl = menuctl;
m->exit = menufree;
return (Control *)m;
}