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+/****************************************************************************
+ * NxWidgets/libnxwidgets/include/inxwindow.hxx
+ *
+ *   Copyright (C) 2012 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, NxWidgets, nor the names of its contributors
+ *    me 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.
+ *
+ ****************************************************************************/
+
+#ifndef __INCLUDE_INXWINDOW_HXX
+#define __INCLUDE_INXWINDOW_HXX
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+ 
+#include <nuttx/config.h>
+
+#include <nuttx/nx/nxglib.h>
+
+#include <stdint.h>
+#include <stdbool.h>
+
+/****************************************************************************
+ * Pre-Processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Pure Virtual Classes
+ ****************************************************************************/
+
+#if defined(__cplusplus)
+
+namespace NXWidgets
+{
+  struct SBitmap;
+
+  /**
+   * This class defines common operations on a any NX window.
+   * There are three instances that represent an NX window from the
+   * perspective of NXWidgets.
+   *
+   * - There is one widget control instance per NX window,
+   * - One CCallback instance per window,
+   * - One window instance.
+   *
+   * There a various kinds of of window instances, but each inherits
+   * (1) CCallback and dispatches the Windows callbacks and (2) INxWindow
+   * that describes the common window behavior.
+   */
+
+  class INxWindow
+  {
+  public:
+
+    /**
+     * Creates a new window.  Window creation is separate from
+     * object instantiation so that window creation failures can
+     * be properly reported.
+     *
+     * @return True if the window was successfully created.
+     */
+     
+    virtual bool open(void) = 0;
+
+    /**
+     * Request the position and size information of the window. The values
+     * will be returned asynchronously through the client callback method.
+     * The GetPosition() method may than be called to obtain the positional
+     * data as provided by the callback.
+     *
+     * @return OK on success; ERROR on failure with errno set appropriately.
+     */
+
+    virtual bool requestPosition(void) = 0;
+
+    /**
+     * Get the position of the window (as reported by the NX callback).
+     *
+     * @return The position.
+     */
+
+    virtual bool getPosition(FAR struct nxgl_point_s *pPos) = 0;
+
+    /**
+     * Get the size of the window (as reported by the NX callback).
+     *
+     * @return The size.
+     */
+
+    virtual bool getSize(FAR struct nxgl_size_s *pSize) = 0;
+
+    /**
+     * Set the position and size of the window.
+     *
+     * @param pPos The new position of the window.
+     * @return True on success, false on failure.
+     */
+     
+    virtual bool setPosition(FAR const struct nxgl_point_s *pPos) = 0;
+
+    /**
+     * Set the size of the selected window.
+     *
+     * @param pSize The new size of the window.
+     * @return OK on success; ERROR on failure with errno set appropriately.
+     */
+    
+    virtual bool setSize(FAR const struct nxgl_size_s *pSize) = 0;
+
+    /**
+     * Bring the window to the top of the display.
+     *
+     * @return OK on success; ERROR on failure with errno set appropriately.
+     */
+
+    virtual bool raise(void) = 0;
+
+    /**
+     * Lower the window to the bottom of the display.
+     *
+     * @return OK on success; ERROR on failure with errno set appropriately.
+     */
+
+    virtual bool lower(void) = 0;
+
+    /**
+     * Set an individual pixel in the window with the specified color.
+     *
+     * @param pPos The location of the pixel to be filled.
+     * @param color The color to use in the fill.
+     *
+     * @return True on success; false on failure.
+     */
+
+    virtual bool setPixel(FAR const struct nxgl_point_s *pPos,
+                          nxgl_mxpixel_t color) = 0;
+
+    /**
+     * Fill the specified rectangle in the window with the specified color.
+     *
+     * @param pRect The location to be filled.
+     * @param color The color to use in the fill.
+     *
+     * @return True on success; false on failure.
+     */
+
+    virtual bool fill(FAR const struct nxgl_rect_s *pRect,
+                      nxgl_mxpixel_t color) = 0;
+
+    /**
+     * Get the raw contents of graphic memory within a rectangular region. NOTE:
+     * Since raw graphic memory is returned, the returned memory content may be
+     * the memory of windows above this one and may not necessarily belong to
+     * this window unless you assure that this is the top window.
+     *
+     * @param rect The location to be copied
+     * @param dest - The describes the destination bitmap to receive the
+     *   graphics data.
+     */
+
+    virtual void getRectangle(FAR const struct nxgl_rect_s *rect,
+                              struct SBitmap *dest) = 0;
+
+    /**
+     * Fill the specified trapezoidal region in the window with the specified
+     * color.
+     *
+     * @param pClip Clipping rectangle relative to window (may be null).
+     * @param pTrap The trapezoidal region to be filled.
+     * @param color The color to use in the fill.
+     *
+     * @return True on success; false on failure.
+     */
+
+    virtual bool fillTrapezoid(FAR const struct nxgl_rect_s *pClip,
+                               FAR const struct nxgl_trapezoid_s *pTrap,
+                               nxgl_mxpixel_t color) = 0;
+
+    /**
+     * Fill the specified line in the window with the specified color.
+     *
+     * @param vector - Describes the line to be drawn
+     * @param width  - The width of the line
+     * @param color  - The color to use to fill the line
+     *
+     * @return True on success; false on failure.
+     */
+
+    virtual bool drawLine(FAR struct nxgl_vector_s *vector,
+                          nxgl_coord_t width,
+                          nxgl_mxpixel_t color) = 0;
+
+    /**
+     * Draw a filled circle at the specified position, size, and color.
+     *
+     * @param center The window-relative coordinates of the circle center.
+     * @param radius The radius of the rectangle in pixels.
+     * @param color The color of the rectangle.
+     */
+
+    virtual bool drawFilledCircle(struct nxgl_point_s *center, nxgl_coord_t radius,
+                                  nxgl_mxpixel_t color) = 0;
+
+    /**
+     * Move a rectangular region within the window.
+     *
+     * @param pRect Describes the rectangular region to move.
+     * @param pOffset The offset to move the region.
+     *
+     * @return True on success; false on failure.
+     */
+
+    virtual bool move(FAR const struct nxgl_rect_s *pRect,
+                      FAR const struct nxgl_point_s *pOffset) = 0;
+
+    /**
+     * Copy a rectangular region of a larger image into the rectangle in the
+     * specified window.  The source image is treated as an opaque image.
+     *
+     * @param pDest Describes the rectangular on the display that will receive
+     * the bitmap.
+     * @param pSrc The start of the source image.
+     * @param pOrigin the pOrigin of the upper, left-most corner of the full
+     * bitmap. Both pDest and pOrigin are in window coordinates, however,
+     * pOrigin may lie outside of the display.
+     * @param stride The width of the full source image in bytes.
+     *
+     * @return True on success; false on failure.
+     */
+
+    virtual bool bitmap(FAR const struct nxgl_rect_s *pDest,
+                        FAR const void *pSrc,
+                        FAR const struct nxgl_point_s *pOrigin,
+                        unsigned int stride) = 0;
+  };
+}
+
+#endif // __cplusplus
+
+#endif // __INCLUDE_INXWINDOW_HXX
+