X-Git-Url: https://git.cworth.org/git?a=blobdiff_plain;f=acre-x.c;h=c375c36efddee95a1d7afd4e74262a3d740f4cbd;hb=bacc5e501df0d3615dbe0aa8ef54b91ee3377b6e;hp=f0fac370a5d9bb45e414c7834a6e5e9087805624;hpb=d27e94f40e87ff3ee5588cec4f986fe046aa9a7d;p=acre

diff --git a/acre-x.c b/acre-x.c
index f0fac37..c375c36 100644
--- a/acre-x.c
+++ b/acre-x.c
@@ -126,6 +126,7 @@ handle_events(Display *dpy, Window window, Visual *visual,
 		XNextEvent (dpy, &xev);
                 switch (xev.type) {
                 case KeyPress:
+			need_redraw = true;
 			keycode = xev.xkey.keycode;
 			if (keycode == quit_code ||
 			    keycode == escape_code)
@@ -153,7 +154,7 @@ handle_events(Display *dpy, Window window, Visual *visual,
 			}
 			else if (keycode == minus_code)
 			{
-				shift = (1- 2*ZOOM) * (x_max - x_min);
+				shift = (ZOOM/(1 - 2 * ZOOM)) * (x_max - x_min);
 				x_min -= shift;
 				x_max += shift;
 			}
@@ -161,7 +162,10 @@ handle_events(Display *dpy, Window window, Visual *visual,
 			{
 				acre_get_x_axis_data_range (acre, &x_min, &x_max);
 			}
-			need_redraw = 1;
+			else
+			{
+				need_redraw = false;
+			}
 			break;
                 case ConfigureNotify:
                         width = xev.xconfigure.width;