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/*
* This file is subject to the terms of the GFX License. If a copy of
* the license was not distributed with this file, you can obtain one at:
*
* http://ugfx.org/license.html
*/
/**
* @file src/gwin/gcontainer.h
* @brief GWIN Containers header file.
*/
#ifndef _GCONTAINER_H
#define _GCONTAINER_H
/* This file is included within "gwin/gwin.h" */
/**
* @defgroup Containers Containers
* @ingroup GWIN
*
* @details A Container is a GWindow that supports child windows. It is also
* a widget in its own right and therefore can accept user input directly.
*
* @pre GFX_USE_GWIN and GWIN_NEED_CONTAINERS must be set to TRUE in your gfxconf.h
* @{
*/
// Forward definition
struct GContainerObject;
/**
* @brief The GWIN Container structure
* @note A container is a GWIN widget that can have children.
* @note Do not access the members directly. Treat it as a black-box and use the method functions.
*
* @{
*/
typedef GWidgetObject GContainerObject;
/* @} */
/**
* A comment/rant on the above structure:
* We would really like the GWidgetObject member to be anonymous. While this is
* allowed under the C11, C99, GNU and various other standards which have been
* around forever - compiler support often requires special flags e.g
* gcc requires the -fms-extensions flag (no wonder the language and compilers have
* not really progressed in 30 years). As portability is a key requirement
* we unfortunately won't use this useful feature in case we get a compiler that
* won't support it even with special flags.
*/
#ifdef __cplusplus
extern "C" {
#endif
/**
* @brief Get the first child window
*
* @return The first child or NULL if are no children windows
*
* @param[in] gh The parent container or NULL to get the first top level window
*
* @api
*/
GHandle gwinGetFirstChild(GHandle gh);
/**
* @brief Get the next child window in the z-order
*
* @return The next window or NULL if no more children
*
* @param[in] gh The window to obtain the next sibling of.
*
* @note This returns the next window under the current parent window.
* Unlike @p gwinGetNextWindow() it will only return windows that
* have the same parent as the supplied window.
*
* @api
*/
GHandle gwinGetSibling(GHandle gh);
/**
* @brief Create a simple container.
* @return NULL if there is no resultant drawing area, otherwise a window handle.
*
* @param[in] g The GDisplay to display this window on
* @param[in] gb The GContainerObject structure to initialise. If this is NULL the structure is dynamically allocated.
* @param[in] pInit The initialisation parameters
*
* @api
*/
GHandle gwinGContainerCreate(GDisplay *g, GContainerObject *gw, const GWidgetInit *pInit);
#define gwinContainerCreate(gc, pInit) gwinGContainerCreate(GDISP, gc, pInit)
#ifdef __cplusplus
}
#endif
/* Include extra container types */
#if GWIN_NEED_FRAME || defined(__DOXYGEN__)
#include "src/gwin/frame.h"
#endif
#endif /* _GCONTAINER_H */
/** @} */
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