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	getrect.c - sam - An updated version of the sam text editor.
	git clone git://vernunftzentrum.de/sam.git
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	getrect.c (1424B)
	---
	1 /* Copyright (c) 1998 Lucent Technologies - All rights reserved. */
	2 #include <u.h>
	3 #include <libg.h>
	4 #include "libgint.h"
	5
	6 static void
	7 grabcursor(void)
	8 {
	9 raisewindow();
	10
	11 /* Grab X server with an limp wrist. */
	12 while (XGrabPointer(_dpy, screen.id, False,
	13 ButtonPressMask\|ButtonReleaseMask\|
	14 ButtonMotionMask\|StructureNotifyMask,
	15 GrabModeAsync, GrabModeAsync, None, None, CurrentTime)
	16 != GrabSuccess)
	17 sleep(2);
	18
	19 /* Grab the keyboard too */
	20 XSetInputFocus(_dpy, screen.id, RevertToParent, CurrentTime);
	21 }
	22
	23 static void
	24 ungrabcursor(void)
	25 {
	26 XUngrabPointer(_dpy, CurrentTime);
	27 }
	28
	29 Rectangle
	30 getrect(int but, Mouse *m){
	31 Rectangle r, rc;
	32
	33 but = 1<<(but-1);
	34 cursorswitch(SweepCursor);
	35 while(m->buttons)
	36 *m = emouse();
	37 grabcursor();
	38 while(!(m->buttons & but)){
	39 *m = emouse();
	40 if(m->buttons & (7^but))
	41 goto Return;
	42 }
	43 r.min = m->xy;
	44 r.max = m->xy;
	45 do{
	46 rc = rcanon(r);
	47 border(&screen, rc, 2, F&~D, _bgpixel);
	48 *m = emouse();
	49 border(&screen, rc, 2, F&~D, _bgpixel);
	50 r.max = m->xy;
	51 }while(m->buttons & but);
	52
	53 Return:
	54 cursorswitch(DefaultCursor);
	55 if(m->buttons & (7^but)){
	56 rc.min.x = rc.max.x = 0;
	57 rc.min.y = rc.max.y = 0;
	58 while(m->buttons)
	59 *m = emouse();
	60 }
	61 ungrabcursor();
	62 return rc;
	63 }