ref: 45e2b4dfe9570aefe3e5f2a8b7af956b7365f522
dir: /sys/src/cmd/proof/screen.c/
#include <u.h>
#include <libc.h>
#include <draw.h>
#include <cursor.h>
#include <event.h>
#include <bio.h>
#include "proof.h"
static int checkmouse(void);
static int buttondown(void);
static char *getmousestr(void);
static char *getkbdstr(int);
extern Cursor blot;
extern char *track;
Mouse mouse;
void
mapscreen(void)
{
if(initdraw(0, 0, "proof") < 0){
fprint(2, "proof: initdraw failed: %r\n");
exits("initdraw");
}
einit(Ekeyboard|Emouse);
}
void
clearscreen(void)
{
draw(screen, screen->r, display->black, nil, ZP);
}
void
screenprint(char *fmt, ...)
{
char buf[100];
Point p;
va_list args;
va_start(args, fmt);
vseprint(buf, &buf[sizeof buf], fmt, args);
va_end(args);
p = Pt(screen->clipr.min.x+40, screen->clipr.max.y-40);
string(screen, p, display->black, ZP, font, buf);
}
#define Viewkey 0xb2
char *
getcmdstr(void)
{
Event ev;
int e;
static ulong timekey = 0;
ulong tracktm = 0;
Dir *dir;
if(track){
if(timekey == 0)
timekey = etimer(0, 5000);
dir = dirstat(track);
if(dir != nil){
tracktm = dir->mtime;
free(dir);
}
}
for (;;) {
e = event(&ev);
if(resized){
resized = 0;
return "p";
}
if ((e & Emouse) && ev.mouse.buttons) {
mouse = ev.mouse;
return getmousestr();
} else if (e & Ekeyboard)
return getkbdstr(ev.kbdc); /* sadly, no way to unget */
else if (e & timekey) {
if((dir = dirstat(track)) != nil){
if(tracktm < dir->mtime){
free(dir);
return "q";
}
free(dir);
}
}
}
}
static char *
getkbdstr(int c0)
{
static char buf[100];
char *p;
int c;
if (c0 == '\n')
return "";
buf[0] = c0;
buf[1] = 0;
screenprint("%s", buf);
for (p = buf+1; (c = ekbd()) != '\n' && c != '\r' && c != -1 && c != Viewkey; ) {
if (c == '\b' && p > buf) {
*--p = ' ';
} else {
*p++ = c;
*p = 0;
}
screenprint("%s", buf);
}
*p = 0;
return buf;
}
#define button3(b) ((b) & 4)
#define button2(b) ((b) & 2)
#define button1(b) ((b) & 1)
#define button23(b) ((b) & 6)
#define button123(b) ((b) & 7)
#define butcvt(b) (1 << ((b) - 1))
static int buttondown(void) /* report state of buttons, if any */
{
if (!ecanmouse()) /* no event pending */
return 0;
mouse = emouse(); /* something, but it could be motion */
return mouse.buttons & 7;
}
int waitdown(void) /* wait until some button is down */
{
while (!(mouse.buttons & 7))
mouse = emouse();
return mouse.buttons & 7;
}
int waitup(void)
{
while (mouse.buttons & 7)
mouse = emouse();
return mouse.buttons & 7;
}
char *m3[] = { "next", "prev", "page n", "again", "bigger", "smaller", "pan", "quit?", 0 };
char *m2[] = { 0 };
enum { Next = 0, Prev, Page, Again, Bigger, Smaller, Pan, Quit };
Menu mbut3 = { m3, 0, 0 };
Menu mbut2 = { m2, 0, 0 };
int last_hit;
int last_but;
char *pan(void)
{
Point dd, xy, lastxy, min, max;
esetcursor(&blot);
waitdown();
xy = mouse.xy;
do{
lastxy = mouse.xy;
mouse = emouse();
dd = subpt(mouse.xy, lastxy);
min = addpt(screen->clipr.min, dd);
max = addpt(screen->clipr.max, dd);
draw(screen, rectaddpt(screen->r, subpt(mouse.xy, lastxy)),
screen, nil, screen->r.min);
if(mouse.xy.x < lastxy.x) /* moved left, clear right */
draw(screen, Rect(max.x, screen->r.min.y, screen->r.max.x, screen->r.max.y),
display->white, nil, ZP);
else /* moved right, clear left*/
draw(screen, Rect(screen->r.min.x, screen->r.min.y, min.x, screen->r.max.y),
display->white, nil, ZP);
if(mouse.xy.y < lastxy.y) /* moved up, clear down */
draw(screen, Rect(screen->r.min.x, max.y, screen->r.max.x, screen->r.max.y),
display->white, nil, ZP);
else /* moved down, clear up */
draw(screen, Rect(screen->r.min.x, screen->r.min.y, screen->r.max.x, min.y),
display->white, nil, ZP);
flushimage(display, 1);
}while(mouse.buttons);
xyoffset = addpt(xyoffset, subpt(mouse.xy, xy));
esetcursor(0);
return "p";
}
static char *
getmousestr(void)
{
static char buf[64];
checkmouse();
if (last_but == 1)
return "p"; /* repaint after panning */
if (last_but == 2) {
return "c";
} else if (last_but == 3) {
switch (last_hit) {
case Next:
return "";
case Prev:
return "-1";
case Page:
screenprint("page? ");
return "c";
case Again:
return "p";
case Bigger:
snprint(buf, sizeof buf, "m%g", mag * 1.1);
return buf;
case Smaller:
snprint(buf, sizeof buf, "m%g", mag / 1.1);
return buf;
case Pan:
return pan();
case Quit:
return "q";
default:
return "c";
}
} else { /* button 1 or bail out */
return "c";
}
}
static int
checkmouse(void) /* return button touched if any */
{
int c, b;
char *p;
extern int confirm(int);
b = waitdown();
last_but = 0;
last_hit = -1;
c = 0;
if (button3(b)) {
last_hit = emenuhit(3, &mouse, &mbut3);
last_but = 3;
} else if (button2(b)) {
last_hit = emenuhit(2, &mouse, &mbut2);
last_but = 2;
} else { /* button1() */
pan();
last_but = 1;
}
waitup();
if (last_but == 3 && last_hit >= 0) {
p = m3[last_hit];
c = p[strlen(p) - 1];
}
if (c == '?' && !confirm(last_but))
last_hit = -1;
return last_but;
}
Cursor deadmouse = {
{ 0, 0}, /* offset */
{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x0C, 0x00, 0x82, 0x04, 0x41,
0xFF, 0xE1, 0x5F, 0xF1, 0x3F, 0xFE, 0x17, 0xF0,
0x03, 0xE0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, },
{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x0C, 0x00, 0x82, 0x04, 0x41,
0xFF, 0xE1, 0x5F, 0xF1, 0x3F, 0xFE, 0x17, 0xF0,
0x03, 0xE0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, }
};
Cursor blot ={
{ 0, 0 },
{ 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, },
{ 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, }
};
Cursor skull ={
{ 0, 0 },
{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xC0, 0x03,
0xE7, 0xE7, 0x3F, 0xFC, 0x0F, 0xF0, 0x0D, 0xB0,
0x07, 0xE0, 0x06, 0x60, 0x37, 0xEC, 0xE4, 0x27,
0xC3, 0xC3, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, },
{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xC0, 0x03,
0xE7, 0xE7, 0x3F, 0xFC, 0x0F, 0xF0, 0x0D, 0xB0,
0x07, 0xE0, 0x06, 0x60, 0x37, 0xEC, 0xE4, 0x27,
0xC3, 0xC3, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, }
};
confirm(int but) /* ask for confirmation if menu item ends with '?' */
{
int c;
static int but_cvt[8] = { 0, 1, 2, 0, 3, 0, 0, 0 };
esetcursor(&skull);
c = waitdown();
waitup();
esetcursor(0);
return but == but_cvt[c];
}