From e2ebaaa2cd997b553c772bafd082b5b2e69efeec Mon Sep 17 00:00:00 2001
From: Daniel Friesel <derf@derf.homelinux.org>
Date: Sat, 19 Jun 2010 20:53:38 +0200
Subject: Make <keypad /> and <keypad *> actually useful

---
 ChangeLog       |  1 +
 src/events.c    | 28 +---------------------------
 src/keyevents.c |  2 ++
 src/winwidget.c | 29 +++++++++++++++++++++++++++++
 src/winwidget.h |  1 +
 5 files changed, 34 insertions(+), 27 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 7ba3f6d..41abda2 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -7,6 +7,7 @@ git HEAD
     * --font now sets the global default font (for action/filename display etc.)
     * Rename --screen-clip 0 to --no-screen-clip
     * Allow multiline theme definitions (via backslash, like in the shell)
+    * Center the image after pressing <keypad /> or <keypad *>
 
 Thu Jun 10 12:12:04 CEST 2010
 
diff --git a/src/events.c b/src/events.c
index 7caa4d2..de2e3c0 100644
--- a/src/events.c
+++ b/src/events.c
@@ -61,7 +61,6 @@ void feh_event_init(void)
 static void feh_event_handle_ButtonPress(XEvent * ev)
 {
 	winwidget winwid = NULL;
-	int scr_width, scr_height;
 
 	/* get the heck out if it's a mouse-click on the
 	   cover, we'll hide the menus on release */
@@ -69,15 +68,6 @@ static void feh_event_handle_ButtonPress(XEvent * ev)
 		return;
 	}
 
-	scr_width = scr->width;
-	scr_height = scr->height;
-#ifdef HAVE_LIBXINERAMA
-	if (opt.xinerama && xinerama_screens) {
-		scr_width = xinerama_screens[xinerama_screen].width;
-		scr_height = xinerama_screens[xinerama_screen].height;
-	}
-#endif				/* HAVE_LIBXINERAMA */
-
 	winwid = winwidget_get_from_window(ev->xbutton.window);
 	if (winwid && winwid->caption_entry) {
 		return;
@@ -132,23 +122,7 @@ static void feh_event_handle_ButtonPress(XEvent * ev)
 			winwid->im_click_offset_y = (winwid->click_offset_y
 					- winwid->im_y) / winwid->old_zoom;
 
-			/* center the image */
-			if (winwid->full_screen) {
-				winwid->im_x = (scr_width - winwid->im_w) >> 1;
-				winwid->im_y = (scr_height - winwid->im_h) >> 1;
-			} else {
-				if (opt.geom_flags & WidthValue) {
-					winwid->im_x = (opt.geom_w - winwid->im_w) >> 1;
-				} else {
-					winwid->im_x = 0;
-				}
-				if (opt.geom_flags & HeightValue) {
-					winwid->im_y = (opt.geom_h - winwid->im_h) >> 1;
-				} else {
-					winwid->im_y = 0;
-				}
-			}
-
+			winwidget_center_image(winwid);
 			winwidget_render_image(winwid, 0, 0);
 		}
 	} else if (ev->xbutton.button == opt.reload_button) {
diff --git a/src/keyevents.c b/src/keyevents.c
index 67f5389..aa18d02 100644
--- a/src/keyevents.c
+++ b/src/keyevents.c
@@ -271,11 +271,13 @@ void feh_event_handle_keypress(XEvent * ev)
 	case XK_KP_Multiply:
 		len = 0;
 		winwid->zoom = 1;
+		winwidget_center_image(winwid);
 		winwidget_render_image(winwid, 0, 0);
 		break;
 	case XK_KP_Divide:
 		len = 0;
 		feh_calc_needed_zoom(&winwid->zoom, winwid->im_w, winwid->im_h, winwid->w, winwid->h);
+		winwidget_center_image(winwid);
 		winwidget_render_image(winwid, 0, 1);
 		break;
 	case XK_KP_Begin:
diff --git a/src/winwidget.c b/src/winwidget.c
index e57be89..3172086 100644
--- a/src/winwidget.c
+++ b/src/winwidget.c
@@ -886,6 +886,35 @@ void winwidget_reset_image(winwidget winwid)
 	return;
 }
 
+void winwidget_center_image(winwidget winwid)
+{
+	int scr_width, scr_height;
+
+	scr_width = scr->width;
+	scr_height = scr->height;
+
+#ifdef HAVE_LIBXINERAMA
+	if (opt.xinerama && xinerama_screens) {
+		scr_width = xinerama_screens[xinerama_screen].width;
+		scr_height = xinerama_screens[xinerama_screen].height;
+	}
+#endif				/* HAVE_LIBXINERAMA */
+
+	if (winwid->full_screen) {
+		winwid->im_x = (scr_width - lround(winwid->im_w * winwid->zoom)) >> 1;
+		winwid->im_y = (scr_height - lround(winwid->im_h * winwid->zoom)) >> 1;
+	} else {
+		if (opt.geom_flags & WidthValue)
+			winwid->im_x = (opt.geom_w - lround(winwid->im_w * winwid->zoom)) >> 1;
+		else
+			winwid->im_x = 0;
+		if (opt.geom_flags & HeightValue)
+			winwid->im_y = (opt.geom_h - lround(winwid->im_h * winwid->zoom)) >> 1;
+		else
+			winwid->im_y = 0;
+	}
+}
+
 void winwidget_sanitise_offsets(winwidget winwid)
 {
 	int far_left, far_top;
diff --git a/src/winwidget.h b/src/winwidget.h
index 37e0624..a856475 100644
--- a/src/winwidget.h
+++ b/src/winwidget.h
@@ -121,6 +121,7 @@ void winwidget_show_menu(winwidget winwid);
 void winwidget_hide(winwidget winwid);
 void winwidget_destroy_all(void);
 void winwidget_free_image(winwidget w);
+void winwidget_center_image(winwidget w);
 void winwidget_render_image(winwidget winwid, int resize, int alias);
 void winwidget_rotate_image(winwidget winid, double angle);
 void winwidget_move(winwidget winwid, int x, int y);
-- 
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