shithub: puzzles

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puts game area in the center

--- a/plan9.c

+++ b/plan9.c

@@ -495,6 +495,7 @@

 	int resizenop;

 	Control *ctl;

 	Point newsize;

+	Point offset;

 	if (getwindow(display, Refnone) < 0) {

 		sysfatal("resize failed: %r");

@@ -513,8 +514,11 @@

 		return;

 	draw(screen, screen->r, fe->background, nil, ZP);

-	fe->rect = rarea;

-	fe->ZP = rarea.min;

+	/* calculate offset to place game area in the center */

+	offset = Pt(Dx(rarea), Dy(rarea)); // size of total game area

+	offset = subpt(divpt(addpt(offset, newsize), 2), newsize);

+	fe->rect = rectaddpt(rarea, offset);

+	fe->ZP = fe->rect.min;

 	chanprint(cs->ctl, "rowmain rect %R\nrowmain show", rmenu);

 	chanprint(cs->ctl, "l_status rect %R\nl_status show", sarea);

@@ -526,7 +530,7 @@

 		flushimage(display, 1);

 		break;

 	case SETTINGS:

-		chanprint(cs->ctl, "c_settings rect %R\nc_settings reveal\nc_settings show", rarea);

+		chanprint(cs->ctl, "c_settings rect %R\nc_settings reveal\nc_settings show", fe->rect);

 		break;

 	}