ref: c3a430e6824a8f1f08f28a8df24b4b64266b06f9
dir: /sys/src/libcontrol/scribble.c/
#include <u.h>
#include <libc.h>
#include <draw.h>
#include <thread.h>
#include <mouse.h>
#include <keyboard.h>
#include <control.h>
#include <scribble.h>
typedef struct Scrib Scrib;
struct Scrib
{
Control;
int border;
CImage *image;
CImage *color;
CImage *bordercolor;
CFont *font;
int align;
int lastbut;
char lastchar[8];
Scribble *scrib;
};
enum{
EAlign,
EBorder,
EBordercolor,
EFocus,
EFont,
EHide,
EImage,
ELinecolor,
ERect,
EReveal,
EShow,
ESize,
};
static char *cmds[] = {
[EAlign] = "align",
[EBorder] = "border",
[EBordercolor] ="bordercolor",
[EFocus] = "focus",
[EFont] = "font",
[EHide] = "hide",
[EImage] = "image",
[ELinecolor] = "linecolor",
[ERect] = "rect",
[EReveal] = "reveal",
[EShow] = "show",
[ESize] = "size",
nil
};
static void scribshow(Scrib*);
static void scribchar(Scrib*, Rune);
static void resetstroke(Scrib *w);
static void displaylast(Scrib *w);
static void addpoint(Scrib *w, Point p);
static void
scribmouse(Control *c, Mouse *m)
{
Scrib *b;
Rune r;
b = (Scrib*)c;
if (m->buttons & 0x1) {
if ((b->lastbut & 0x1) == 0) {
/* mouse went down */
resetstroke(b);
}
/* mouse is down */
if (ptinrect(m->xy,b->rect))
addpoint(b, m->xy);
} else if (b->lastbut & 0x1) {
/* mouse went up */
if (ptinrect(m->xy,b->rect)) {
r = recognize(b->scrib);
scribchar(b, r);
scribshow(b);
if (r) chanprint(b->event, b->format, b->name, r);
}
}
b->lastbut = m->buttons;
}
static void
scribfree(Control *c)
{
Scrib *b;
b = (Scrib*)c;
_putctlimage(b->image);
_putctlimage(b->color);
_putctlimage(b->bordercolor);
_putctlfont(b->font);
// scribblefree(b->scrib);
}
static void
scribchar(Scrib *b, Rune r)
{
if(r == 0)
b->lastchar[0] = '\0';
else if(r == ' ')
strcpy(b->lastchar, "' '");
else if(r < ' ')
sprint(b->lastchar, "ctl-%c", r+'@');
else
sprint(b->lastchar, "%C", r);
}
static void
scribshow(Scrib *b)
{
Image *i;
Rectangle r;
char *mode;
Scribble *s = b->scrib;
char buf[32];
if (b->hidden)
return;
if(b->border > 0){
r = insetrect(b->rect, b->border);
border(b->screen, b->rect, b->border, b->bordercolor->image, ZP);
}else
r = b->rect;
i = b->image->image;
draw(b->screen, r, i, nil, i->r.min);
if (s->ctrlShift)
mode = " ^C";
else if (s->puncShift)
mode = " #&^";
else if (s->curCharSet == CS_DIGITS)
mode = " 123";
else if (s->capsLock)
mode = " ABC";
else if (s->tmpShift)
mode = " Abc";
else
mode = " abc";
snprint(buf, sizeof buf, "%s %s", mode, b->lastchar);
string(b->screen, r.min, b->color->image, ZP, b->font->font, buf);
flushimage(display, 1);
}
static void
scribctl(Control *c, CParse *cp)
{
int cmd;
Rectangle r;
Scrib *b;
b = (Scrib*)c;
cmd = _ctllookup(cp->args[0], cmds, nelem(cmds));
switch(cmd){
default:
abort();
ctlerror("%q: unrecognized message '%s'", b->name, cp->str);
break;
case EAlign:
_ctlargcount(b, cp, 2);
b->align = _ctlalignment(cp->args[1]);
break;
case EBorder:
_ctlargcount(b, cp, 2);
if(cp->iargs[1] < 0)
ctlerror("%q: bad border: %c", b->name, cp->str);
b->border = cp->iargs[1];
break;
case EBordercolor:
_ctlargcount(b, cp, 2);
_setctlimage(b, &b->bordercolor, cp->args[1]);
break;
case EFocus:
break;
case EImage:
_ctlargcount(b, cp, 2);
_setctlimage(b, &b->image, cp->args[1]);
break;
case ELinecolor:
_ctlargcount(b, cp, 2);
_setctlimage(b, &b->bordercolor, cp->args[1]);
break;
case ERect:
_ctlargcount(b, 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", b->name, cp->str);
b->rect = r;
break;
case EReveal:
_ctlargcount(b, cp, 1);
b->hidden = 0;
scribshow(b);
break;
case EShow:
_ctlargcount(b, cp, 1);
scribshow(b);
break;
case EFont:
_ctlargcount(b, cp, 2);
_setctlfont(b, &b->font, cp->args[1]);
break;
case EHide:
_ctlargcount(b, cp, 1);
b->hidden = 1;
break;
case ESize:
if (cp->nargs == 3)
r.max = Pt(0x7fffffff, 0x7fffffff);
else{
_ctlargcount(b, 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", b->name, cp->str);
b->size.min = r.min;
b->size.max = r.max;
break;
}
}
static void
resetstroke(Scrib *w)
{
Scribble *s = w->scrib;
s->ps.npts = 0;
scribshow(w);
}
static void
displaylast(Scrib *w)
{
int npt;
Scribble *s = w->scrib;
npt = s->ps.npts;
if (npt > 2)
npt = 2;
poly(w->screen, s->pt + (s->ps.npts - npt), npt, Endsquare, Endsquare,
0, w->color->image, ZP);
flushimage(display, 1);
}
static void
addpoint(Scrib *w, Point p)
{
pen_point *ppa;
Point *pt;
int ppasize;
Scribble *s = w->scrib;
if (s->ps.npts == s->ppasize) {
ppasize = s->ppasize + 100;
ppa = malloc ((sizeof (pen_point) + sizeof (Point)) * ppasize);
if (!ppa)
return;
pt = (Point *) (ppa + ppasize);
memmove(ppa, s->ps.pts, s->ppasize * sizeof (pen_point));
memmove(pt, s->pt, s->ppasize * sizeof (Point));
free (s->ps.pts);
s->ps.pts = ppa;
s->pt = pt;
s->ppasize = ppasize;
}
ppa = &s->ps.pts[s->ps.npts];
ppa->Point = p;
pt = &s->pt[s->ps.npts];
*pt = p;
s->ps.npts++;
displaylast(w);
}
Control*
createscribble(Controlset *cs, char *name)
{
Scrib *b;
b = (Scrib*)_createctl(cs, "scribble", sizeof(Scrib), name);
b->image = _getctlimage("white");
b->color = _getctlimage("black");
b->bordercolor = _getctlimage("black");
b->align = Aupperleft;
b->format = ctlstrdup("%q: value 0x%x");
b->font = _getctlfont("font");
b->scrib = scribblealloc();
b->lastbut = 0;
b->bordercolor = _getctlimage("black");
b->border = 0;
b->ctl = scribctl;
b->mouse = scribmouse;
b->exit = scribfree;
return (Control*)b;
}