Allow the x and y pixel values of viewports to be a negative number..

%V|-50|0|-|..... will position that viewport 50 pixels from the right of the display at the top.


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@23378 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 5 insertions, 1 deletions

diff --git a/apps/gui/viewport.c b/apps/gui/viewport.c
index f39a299521..9bf0e80179 100644
--- a/apps/gui/viewport.c
+++ b/apps/gui/viewport.c
@@ -445,7 +445,11 @@ const char* viewport_parse_viewport(struct viewport *vp,
     /* X and Y *must* be set */
     if (!LIST_VALUE_PARSED(set, PL_X) || !LIST_VALUE_PARSED(set, PL_Y))
         return NULL;
-    
+    /* check for negative values */        
+    if (vp->x < 0)
+        vp->x += screens[screen].lcdwidth;
+    if (vp->y < 0)
+        vp->y += screens[screen].lcdheight;
     /* fix defaults */
     if (!LIST_VALUE_PARSED(set, PL_WIDTH))
         vp->width = screens[screen].lcdwidth - vp->x;