117 lines
4.1 KiB
C
117 lines
4.1 KiB
C
/****************************************************************************
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* libs/libnx/nxtk/nxtk_subwindowmove.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <debug.h>
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#include <nuttx/nx/nx.h>
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#include <nuttx/nx/nxtk.h>
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#include "nxtk.h"
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: nxtk_subwindowmove
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*
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* Description:
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* Perform common clipping operations in preparatons for calling nx_move()
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*
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* Input Parameters:
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* fwnd - The framed window within which the move is to be done.
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* This must have been previously created by
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* nxtk_openwindow().
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* destrect - The loccation to receive the clipped rectangle relative
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* to containing window
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* destoffset - The location to received the clipped offset.
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* srcrect - Describes the rectangular region relative to the client
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* sub-window to move relative to the sub-window
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* srcoffset - The offset to move the region
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* bounds - The subwindow bounds in absolute screen coordinates.
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*
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* Returned Value:
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* OK on success; ERROR on failure with errno set appropriately
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*
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****************************************************************************/
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void nxtk_subwindowmove(FAR struct nxtk_framedwindow_s *fwnd,
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FAR struct nxgl_rect_s *destrect,
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FAR struct nxgl_point_s *destoffset,
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FAR const struct nxgl_rect_s *srcrect,
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FAR const struct nxgl_point_s *srcoffset,
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FAR const struct nxgl_rect_s *bounds)
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{
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struct nxgl_rect_s abssrc;
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/* Temporarily, position the src rectangle in absolute screen coordinates */
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nxgl_rectoffset(&abssrc, srcrect, bounds->pt1.x, bounds->pt1.y);
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/* Clip the src rectangle to lie within the client window region */
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nxgl_rectintersect(&abssrc, &abssrc, &fwnd->fwrect);
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/* Clip the source rectangle so that destination area is within the
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* window.
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*/
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destoffset->x = srcoffset->x;
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if (destoffset->x < 0)
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{
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if (abssrc.pt1.x + destoffset->x < bounds->pt1.x)
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{
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abssrc.pt1.x = bounds->pt1.x - destoffset->x;
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}
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}
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else if (abssrc.pt2.x + destoffset->x > bounds->pt2.x)
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{
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abssrc.pt2.x = bounds->pt2.x - destoffset->x;
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}
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destoffset->y = srcoffset->y;
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if (destoffset->y < 0)
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{
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if (abssrc.pt1.y + destoffset->y < bounds->pt1.y)
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{
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abssrc.pt1.y = bounds->pt1.y - destoffset->y;
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}
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}
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else if (abssrc.pt2.y + destoffset->y > bounds->pt2.y)
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{
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abssrc.pt2.y = bounds->pt2.y - destoffset->y;
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}
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/* Then move the rectangle so that is relative to the containing window,
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* not the client subwindow
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*/
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nxgl_rectoffset(destrect, &abssrc, -fwnd->wnd.bounds.pt1.x,
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-fwnd->wnd.bounds.pt1.y);
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}
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