98 lines
2.4 KiB
C
98 lines
2.4 KiB
C
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#include <u.h>
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#include <libc.h>
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#include <draw.h>
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#include <event.h>
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#include <panel.h>
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#include "pldefs.h"
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typedef struct Slider Slider;
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struct Slider{
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int dir; /* HORIZ or VERT */
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int val; /* setting, in screen coordinates */
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Point minsize;
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void (*hit)(Panel *, int, int, int); /* call back to user when slider changes */
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int buttons;
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};
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void pl_drawslider(Panel *p){
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Rectangle r;
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Slider *sp;
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sp=p->data;
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r=pl_box(p->b, p->r, UP);
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switch(sp->dir){
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case HORIZ: pl_sliderupd(p->b, r, sp->dir, 0, sp->val); break;
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case VERT: pl_sliderupd(p->b, r, sp->dir, r.max.y-sp->val, r.max.y); break;
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}
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}
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int pl_hitslider(Panel *p, Mouse *m){
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int oldstate, oldval, len;
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Point ul, size;
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Slider *sp;
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sp=p->data;
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ul=p->r.min;
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size=subpt(p->r.max, p->r.min);
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pl_interior(p->state, &ul, &size);
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oldstate=p->state;
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oldval=sp->val;
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SET(len);
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if(m->buttons&OUT)
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p->state=UP;
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else if(m->buttons&7){
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p->state=DOWN;
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sp->buttons=m->buttons;
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if(sp->dir==HORIZ){
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sp->val=m->xy.x-ul.x;
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len=size.x;
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}
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else{
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sp->val=ul.y+size.y-m->xy.y;
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len=size.y;
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}
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if(sp->val<0) sp->val=0;
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else if(sp->val>len) sp->val=len;
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}
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else /* mouse inside, but no buttons down */
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p->state=UP;
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if(oldval!=sp->val || oldstate!=p->state) pldraw(p, p->b);
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if(oldval!=sp->val && sp->hit) sp->hit(p, sp->buttons, sp->val, len);
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return 0;
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}
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void pl_typeslider(Panel *p, Rune c){
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USED(p, c);
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}
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Point pl_getsizeslider(Panel *p, Point children){
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USED(children);
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return pl_boxsize(((Slider *)p->data)->minsize, p->state);
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}
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void pl_childspaceslider(Panel *g, Point *ul, Point *size){
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USED(g, ul, size);
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}
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void plinitslider(Panel *v, int flags, Point size, void (*hit)(Panel *, int, int, int)){
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Slider *sp;
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sp=v->data;
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v->r=Rect(0,0,size.x,size.y);
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v->flags=flags|LEAF;
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v->state=UP;
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v->draw=pl_drawslider;
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v->hit=pl_hitslider;
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v->type=pl_typeslider;
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v->getsize=pl_getsizeslider;
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v->childspace=pl_childspaceslider;
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sp->minsize=size;
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sp->dir=size.x>size.y?HORIZ:VERT;
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sp->hit=hit;
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v->kind="slider";
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}
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Panel *plslider(Panel *parent, int flags, Point size, void (*hit)(Panel *, int, int, int)){
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Panel *p;
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p=pl_newpanel(parent, sizeof(Slider));
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plinitslider(p, flags, size, hit);
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return p;
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}
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void plsetslider(Panel *p, int value, int range){
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Slider *sp;
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sp=p->data;
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if(value<0) value=0;
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else if(value>range) value=range;
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if(sp->dir==HORIZ) sp->val=value*(p->r.max.x-p->r.min.x)/range;
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else sp->val=value*(p->r.max.y-p->r.min.y)/range;
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}
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