More NXTK files

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@1391 42af7a65-404d-4744-a932-0658087f49c3

1 files changed, 152 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..8408465d2
--- /dev/null
+++ b/nuttx/graphics/nxtk/nxtk_subwindowmove.c
@@ -0,0 +1,152 @@
+/****************************************************************************
+ * graphics/nxtk/nxtk_subwindowmove.c
+ *
+ *   Copyright (C) 2008 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * 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 <sys/types.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <debug.h>
+
+#include <nuttx/nx.h>
+#include <nuttx/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);
+}