ref: 54bac038f411c10a596adf84c06df32f8c7c4c53
dir: /libtk/panel.c/
#include "lib9.h"
#include "draw.h"
#include "tk.h"
#define O(t, e) ((long)(&((t*)0)->e))
typedef struct TkPanel TkPanel;
struct TkPanel
{
Image* image;
Image* matte;
Point view; /* vector from image origin to widget origin */
Rectangle r; /* drawn rectangle (in image coords) */
int anchor;
int hasalpha; /* does the image include an alpha channel? */
};
static TkOption tkpanelopts[] =
{
"anchor", OPTflag, O(TkPanel, anchor), tkanchor,
nil
};
static int
tkdrawnrect(Image *image, Image *matte, Rectangle *r)
{
*r = image->clipr;
if (matte != nil) {
if (!rectclip(r, matte->clipr))
return 0;
if (!matte->repl && !rectclip(r, matte->r))
return 0;
}
if (!image->repl && !rectclip(r, image->r))
return 0;
return 1;
}
char*
tkpanel(TkTop *t, char *arg, char **ret)
{
TkOptab tko[3];
Tk *tk;
TkPanel *tkp;
TkName *names;
char *e;
tk = tknewobj(t, TKpanel, sizeof(Tk)+sizeof(TkPanel));
if(tk == nil)
return TkNomem;
tkp = TKobj(TkPanel, tk);
tkp->anchor = Tkcenter;
tko[0].ptr = tk;
tko[0].optab = tkgeneric;
tko[1].ptr = tkp;
tko[1].optab = tkpanelopts;
tko[2].ptr = nil;
names = nil;
e = tkparse(t, arg, tko, &names);
if(e != nil) {
tkfreeobj(tk);
return e;
}
tksettransparent(tk, tkhasalpha(tk->env, TkCbackgnd));
e = tkaddchild(t, tk, &names);
tkfreename(names);
if (e != nil) {
tkfreeobj(tk);
return e;
}
tk->name->link = nil;
return tkvalue(ret, "%s", tk->name->name);
}
void
tkgetpanelimage(Tk *tk, Image **i, Image **m)
{
TkPanel *tkp = TKobj(TkPanel, tk);
*i = tkp->image;
*m = tkp->matte;
}
void
tksetpanelimage(Tk *tk, Image *image, Image *matte)
{
TkPanel *tkp = TKobj(TkPanel, tk);
int ishuge;
TkGeom g;
g = tk->req;
tkp->image = image;
tkp->matte = matte;
if (!tkdrawnrect(image, matte, &tkp->r)) {
tkp->r.min = image->r.min;
tkp->r.max = image->r.min;
}
tkp->view = tkp->r.min; /* XXX do we actually want to keep the old one? */
/*
* if both image and matte are replicated, then we've got no idea what
* the rectangle should be, so request zero size, and set origin to (0, 0).
*/
ishuge = (Dx(tkp->r) >= 10000000);
if((tk->flag & Tksetwidth) == 0){
if(ishuge)
tk->req.width = 0;
else
tk->req.width = Dx(tkp->r);
}
if(ishuge)
tkp->view.x = 0;
ishuge = (Dy(tkp->r) >= 10000000);
if((tk->flag & Tksetheight) == 0){
if(ishuge)
tk->req.height = 0;
else
tk->req.height = Dy(tkp->r);
}
if(ishuge)
tkp->view.y = 0;
tkp->hasalpha = tkchanhastype(image->chan, CAlpha);
tkgeomchg(tk, &g, tk->borderwidth);
tksettransparent(tk, tkp->hasalpha || tkhasalpha(tk->env, TkCbackgnd));
tk->dirty = tkrect(tk, 0);
}
static void
tkfreepanel(Tk *tk)
{
TkPanel *tkp = TKobj(TkPanel, tk);
tkdelpanelimage(tk->env->top, tkp->image);
tkdelpanelimage(tk->env->top, tkp->matte);
}
static Point
tkpanelview(Tk *tk)
{
int dx, dy;
Point view;
TkPanel *tkp = TKobj(TkPanel, tk);
dx = tk->act.width - Dx(tkp->r);
dy = tk->act.height - Dy(tkp->r);
view = tkp->view;
if (dx > 0) {
if((tkp->anchor & (Tkeast|Tkwest)) == 0)
view.x -= dx/2;
else
if(tkp->anchor & Tkeast)
view.x -= dx;
}
if (dy > 0) {
if((tkp->anchor & (Tknorth|Tksouth)) == 0)
view.y -= dy/2;
else
if(tkp->anchor & Tksouth)
view.y -= dy;
}
return view;
}
static char*
tkdrawpanel(Tk *tk, Point orig)
{
Rectangle r, pr;
TkPanel *tkp = TKobj(TkPanel, tk);
Image *i;
int any;
Point view, p;
i = tkimageof(tk);
if (i == nil)
return nil;
p.x = orig.x + tk->act.x + tk->borderwidth;
p.y = orig.y + tk->act.y + tk->borderwidth;
view = tkpanelview(tk);
/*
* if the image doesn't fully cover the dirty rectangle, then
* paint some background in there
*/
r = rectsubpt(tkp->r, view); /* convert to widget coords */
pr = tkrect(tk, 0);
any = rectclip(&r, pr); /* clip to inside widget borders */
if (!any || tkp->hasalpha || !rectinrect(tk->dirty, r))
draw(i, rectaddpt(tk->dirty, p), tkgc(tk->env, TkCbackgnd), nil, ZP);
if (any && rectclip(&r, tk->dirty))
draw(i, rectaddpt(r, p), tkp->image, tkp->matte, addpt(r.min, view));
if (!rectinrect(tk->dirty, pr)) {
p.x -= tk->borderwidth;
p.y -= tk->borderwidth;
tkdrawrelief(i, tk, p, TkCbackgnd, tk->relief);
}
return nil;
}
static char*
tkpanelcget(Tk *tk, char *arg, char **val)
{
TkOptab tko[3];
TkPanel *tkp = TKobj(TkPanel, tk);
tko[0].ptr = tk;
tko[0].optab = tkgeneric;
tko[1].ptr = tkp;
tko[1].optab = tkpanelopts;
tko[2].ptr = nil;
return tkgencget(tko, arg, val, tk->env->top);
}
static char*
tkpanelcvt(Tk *tk, char *arg, int rel, int *p)
{
char buf[Tkmaxitem];
tkword(tk->env->top, arg, buf, buf+sizeof(buf), nil);
if(buf[0] == '\0')
return TkBadvl;
*p = atoi(buf) + rel;
return nil;
}
/*
* screen to image
*/
static char*
tkpanelpanelx(Tk *tk, char *arg, char **val)
{
Point p;
char *e;
USED(val);
p = subpt(tkposn(tk), tkpanelview(tk));
e = tkpanelcvt(tk, arg, -p.x, &p.x);
if (e != nil)
return e;
return tkvalue(val, "%d", p.x);
}
static char*
tkpanelpanely(Tk *tk, char *arg, char **val)
{
Point p;
char *e;
USED(val);
p = subpt(tkposn(tk), tkpanelview(tk));
e = tkpanelcvt(tk, arg, -p.y, &p.y);
if (e != nil)
return e;
return tkvalue(val, "%d", p.y);
}
/*
* image to screen
*/
static char*
tkpanelscreenx(Tk *tk, char *arg, char **val)
{
Point p;
char *e;
USED(val);
p = subpt(tkposn(tk), tkpanelview(tk));
e = tkpanelcvt(tk, arg, p.x, &p.x);
if (e != nil)
return e;
return tkvalue(val, "%d", p.x);
}
static char*
tkpanelscreeny(Tk *tk, char *arg, char **val)
{
Point p;
char *e;
USED(val);
p = subpt(tkposn(tk), tkpanelview(tk));
e = tkpanelcvt(tk, arg, p.y, &p.y);
if (e != nil)
return e;
return tkvalue(val, "%d", p.y);
}
static char*
tkpanelconf(Tk *tk, char *arg, char **val)
{
char *e;
TkGeom g;
int bd;
TkOptab tko[3];
TkPanel *tkp = TKobj(TkPanel, tk);
tko[0].ptr = tk;
tko[0].optab = tkgeneric;
tko[1].ptr = tkp;
tko[1].optab = tkpanelopts;
tko[2].ptr = nil;
if(*arg == '\0')
return tkconflist(tko, val);
g = tk->req;
bd = tk->borderwidth;
e = tkparse(tk->env->top, arg, tko, nil);
tkgeomchg(tk, &g, bd);
tksettransparent(tk, tkp->hasalpha || tkhasalpha(tk->env, TkCbackgnd));
tk->dirty = tkrect(tk, 1);
return e;
}
static char*
tkpaneldirty(Tk *tk, char *arg, char **val)
{
char buf[Tkmaxitem];
int n, coords[4];
Rectangle r;
char *e, *p;
TkPanel *tkp = TKobj(TkPanel, tk);
USED(val);
n = 0;
while (n < 4) {
arg = tkword(tk->env->top, arg, buf, buf+sizeof(buf), nil);
if (buf[0] == 0)
break;
p = buf;
e = tkfrac(&p, &coords[n++], nil);
if (e != nil)
return TkBadvl;
}
if (n == 0)
r = tkp->r;
else {
if (n != 4)
return TkBadvl;
r.min.x = TKF2I(coords[0]);
r.min.y = TKF2I(coords[1]);
r.max.x = TKF2I(coords[2]);
r.max.y = TKF2I(coords[3]);
}
if (rectclip(&r, tkp->r)) {
r = rectsubpt(r, tkpanelview(tk)); /* convert to widget coords */
if (rectclip(&r, tkrect(tk, 0))) /* clip to visible area */
combinerect(&tk->dirty, r);
}
return nil;
}
static char*
tkpanelorigin(Tk *tk, char *arg, char **val)
{
char *e;
Point view;
TkPanel *tkp = TKobj(TkPanel, tk);
e = tkxyparse(tk, &arg, &view);
if (e != nil) {
if (e == TkOparg)
return tkvalue(val, "%d %d", tkp->view.x, tkp->view.y);
return e;
}
tkp->view = view;
tk->dirty = tkrect(tk, 0);
return nil;
}
static
TkCmdtab tkpanelcmd[] =
{
"cget", tkpanelcget,
"configure", tkpanelconf,
"dirty", tkpaneldirty,
"origin", tkpanelorigin,
"panelx", tkpanelpanelx,
"panely", tkpanelpanely,
"screenx", tkpanelscreenx,
"screeny", tkpanelscreeny,
nil
};
TkMethod panelmethod = {
"panel",
tkpanelcmd,
tkfreepanel,
tkdrawpanel
};