diff options
Diffstat (limited to 'nuttx/graphics/nxtk/nxtk_subwindowmove.c')
-rw-r--r-- | nuttx/graphics/nxtk/nxtk_subwindowmove.c | 151 |
1 files changed, 151 insertions, 0 deletions
diff --git a/nuttx/graphics/nxtk/nxtk_subwindowmove.c b/nuttx/graphics/nxtk/nxtk_subwindowmove.c new file mode 100644 index 000000000..a6fd9f5dd --- /dev/null +++ b/nuttx/graphics/nxtk/nxtk_subwindowmove.c @@ -0,0 +1,151 @@ +/**************************************************************************** + * graphics/nxtk/nxtk_subwindowmove.c + * + * Copyright (C) 2008-2009 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <gnutt@nuttx.org> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> + +#include <stdlib.h> +#include <errno.h> +#include <debug.h> + +#include <nuttx/nx/nx.h> +#include <nuttx/nx/nxtk.h> + +#include "nxfe.h" +#include "nxtk_internal.h" + +/**************************************************************************** + * Pre-Processor Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Types + ****************************************************************************/ + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/**************************************************************************** + * Public Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: nxtk_subwindowmove + * + * Description: + * Perform common clipping operations in preparatons for calling nx_move() + * + * Input Parameters: + * fwnd - The framed window within which the move is to be done. + * This must have been previously created by nxtk_openwindow(). + * destrect - The loccation to receive the clipped rectangle relative + * to containing window + * destoffset - The location to received the clipped offset. + * srcrect - Describes the rectangular region relative to the client + * sub-window to move relative to the sub-window + * srcoffset - The offset to move the region + * bounds - The subwindow bounds in absolute screen coordinates. + * + * Return: + * OK on success; ERROR on failure with errno set appropriately + * + ****************************************************************************/ + +void nxtk_subwindowmove(FAR struct nxtk_framedwindow_s *fwnd, + FAR struct nxgl_rect_s *destrect, + FAR struct nxgl_point_s *destoffset, + FAR const struct nxgl_rect_s *srcrect, + FAR const struct nxgl_point_s *srcoffset, + FAR const struct nxgl_rect_s *bounds) +{ + struct nxgl_rect_s abssrc; + + /* Temporarily, position the src rectangle in absolute screen coordinates */ + + nxgl_rectoffset(&abssrc, srcrect, bounds->pt1.x, bounds->pt1.y); + + /* Clip the src rectangle to lie within the client window region */ + + nxgl_rectintersect(&abssrc, &abssrc, &fwnd->fwrect); + + /* Clip the offset so that the source rectangle does not move out of the + * the client sub-window. + */ + + destoffset->x = srcoffset->x; + if (destoffset->x < 0) + { + if (abssrc.pt1.x + destoffset->x < bounds->pt1.x) + { + destoffset->x = bounds->pt1.x - abssrc.pt1.x; + } + } + else if (abssrc.pt2.x + destoffset->x > bounds->pt2.x) + { + destoffset->x = bounds->pt2.x - abssrc.pt2.x; + } + + destoffset->y = srcoffset->y; + if (destoffset->y < 0) + { + if (abssrc.pt1.y + destoffset->y < bounds->pt1.y) + { + destoffset->y = bounds->pt1.y - abssrc.pt1.y; + } + } + else if (abssrc.pt2.y + destoffset->y > bounds->pt2.y) + { + destoffset->y = bounds->pt2.y - abssrc.pt2.y; + } + + + /* Then move the rectangle so that is relative to the containing window, not the + * client subwindow + */ + + nxgl_rectoffset(destrect, &abssrc, -fwnd->wnd.bounds.pt1.x, -fwnd->wnd.bounds.pt1.y); +} |