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libframe: auto scale tick for retina

Browse source 
R=rsc
http://codereview.appspot.com/6850102
This commit is contained in:
Russ Cox 2012-11-25 23:48:19 -05:00
parent ffaaaf9dae
commit cc9547960e
3 changed files with 24 additions and 10 deletions
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2
include/frame.h
View file

@ -19,7 +19,6 @@ enum{
};
#define FRTICKW 3
struct Frbox
{
long wid; /* in pixels */
@ -51,6 +50,7 @@ struct Frame
Image *tickback; /* saved image under tick */
int ticked; /* flag: is tick onscreen? */
int noredraw; /* don't draw on the screen */
int tickscale; /* tick scaling factor */
};
ulong frcharofpt(Frame*, Point);

19
src/libframe/frdraw.c
View file

@ -137,15 +137,15 @@ frredraw(Frame *f)
pt = frdrawsel0(f, pt, f->p1, f->nchars, f->cols[BACK], f->cols[TEXT]);
}
void
frtick(Frame *f, Point pt, int ticked)
static void
_frtick(Frame *f, Point pt, int ticked)
{
Rectangle r;
if(f->ticked==ticked || f->tick==0 || !ptinrect(pt, f->r))
return;
pt.x--; /* looks best just left of where requested */
r = Rect(pt.x, pt.y, pt.x+FRTICKW, pt.y+f->font->height);
pt.x -= f->tickscale; /* looks best just left of where requested */
r = Rect(pt.x, pt.y, pt.x+FRTICKW*f->tickscale, pt.y+f->font->height);
/* can go into left border but not right */
if(r.max.x > f->r.max.x)
r.max.x = f->r.max.x;
@ -157,6 +157,17 @@ frtick(Frame *f, Point pt, int ticked)
f->ticked = ticked;
}
void
frtick(Frame *f, Point pt, int ticked)
{
if(f->tickscale != scalesize(f->display, 1)) {
if(f->ticked)
_frtick(f, pt, 0);
frinittick(f);
}
_frtick(f, pt, ticked);
}
Point
_frdraw(Frame *f, Point pt)
{

11
src/libframe/frinit.c
View file

@ -31,11 +31,14 @@ frinittick(Frame *f)
Image *b;
Font *ft;
if(f->cols[BACK] == nil || f->display == nil)
return;
f->tickscale = scalesize(f->display, 1);
b = f->display->screenimage;
ft = f->font;
if(f->tick)
freeimage(f->tick);
f->tick = allocimage(f->display, Rect(0, 0, FRTICKW, ft->height), b->chan, 0, DWhite);
f->tick = allocimage(f->display, Rect(0, 0, f->tickscale*FRTICKW, ft->height), b->chan, 0, DWhite);
if(f->tick == nil)
return;
if(f->tickback)
@ -49,10 +52,10 @@ frinittick(Frame *f)
/* background color */
draw(f->tick, f->tick->r, f->cols[BACK], nil, ZP);
/* vertical line */
draw(f->tick, Rect(FRTICKW/2, 0, FRTICKW/2+1, ft->height), f->display->black, nil, ZP);
draw(f->tick, Rect(f->tickscale*(FRTICKW/2), 0, f->tickscale*(FRTICKW/2+1), ft->height), f->display->black, nil, ZP);
/* box on each end */
draw(f->tick, Rect(0, 0, FRTICKW, FRTICKW), f->cols[TEXT], nil, ZP);
draw(f->tick, Rect(0, ft->height-FRTICKW, FRTICKW, ft->height), f->cols[TEXT], nil, ZP);
draw(f->tick, Rect(0, 0, f->tickscale*FRTICKW, f->tickscale*FRTICKW), f->cols[TEXT], nil, ZP);
draw(f->tick, Rect(0, ft->height-f->tickscale*FRTICKW, f->tickscale*FRTICKW, ft->height), f->cols[TEXT], nil, ZP);
}
void