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- /****************************************************************************
- * 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 source rectangle so that destination area is within the window. */
- destoffset->x = srcoffset->x;
- if (destoffset->x < 0)
- {
- if (abssrc.pt1.x + destoffset->x < bounds->pt1.x)
- {
- abssrc.pt1.x = bounds->pt1.x - destoffset->x;
- }
- }
- else if (abssrc.pt2.x + destoffset->x > bounds->pt2.x)
- {
- abssrc.pt2.x = bounds->pt2.x - destoffset->x;
- }
- destoffset->y = srcoffset->y;
- if (destoffset->y < 0)
- {
- if (abssrc.pt1.y + destoffset->y < bounds->pt1.y)
- {
- abssrc.pt1.y = bounds->pt1.y - destoffset->y;
- }
- }
- else if (abssrc.pt2.y + destoffset->y > bounds->pt2.y)
- {
- abssrc.pt2.y = bounds->pt2.y - destoffset->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);
- }
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