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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/gwin_container.h
*
* @defgroup Container Container
* @ingroup Containers
*
* @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
* @{
*/
#ifndef _GCONTAINER_H
#define _GCONTAINER_H
/* This file is included within "src/gwin/sys_defs.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 Get the inner width of a container window
*
* @return The inner width of a container window or zero if this is not a container
*
* @param[in] gh The window
*
* @api
*/
coord_t gwinGetInnerWidth(GHandle gh);
/**
* @brief Get the inner height of a container window
*
* @return The inner height of a container window or zero if this is not a container
*
* @param[in] gh The window
*
* @api
*/
coord_t gwinGetInnerHeight(GHandle gh);
/**
* @brief Flags for gwinContainerCreate()
* @{
*/
#define GWIN_CONTAINER_BORDER 0x00000001
/** @} */
/**
* @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] gw The GContainerObject structure to initialise. If this is NULL the structure is dynamically allocated.
* @param[in] pInit The initialisation parameters
* @param[in] flags Some flags, see notes
*
* @api
*/
GHandle gwinGContainerCreate(GDisplay *g, GContainerObject *gw, const GWidgetInit *pInit, uint32_t flags);
#define gwinContainerCreate(gc, pInit, flags) gwinGContainerCreate(GDISP, gc, pInit, flags)
/**
* @brief The custom draw routines for a simple container
* @details These function may be passed to @p gwinSetCustomDraw() to get different frame drawing styles
*
* @param[in] gw The widget object (in this case a frame)
* @param[in] param A parameter passed in from the user
*
* @note In your own custom drawing function you may optionally call these
* standard functions and then draw your extra details on top.
*
* @note gwinContainerDraw_Std() will fill the client area with the background color.<br/>
* gwinContainerDraw_Transparent() will not fill the client area at all.<br/>
* gwinContainerDraw_Image() will tile the image throughout the client area.<br/>
* All these drawing functions draw the frame itself the same way.
*
* @note The standard functions below ignore the param parameter except for @p gwinContainerDraw_Image().
* @note The image custom draw function @p gwinContainerDraw_Image() uses param to pass in the gdispImage pointer.
* The image must be already opened before calling @p gwinSetCustomDraw().
*
* @api
* @{
*/
void gwinContainerDraw_Std(GWidgetObject *gw, void *param);
void gwinContainerDraw_Transparent(GWidgetObject *gw, void *param);
void gwinContainerDraw_Image(GWidgetObject *gw, void *param);
/** @} */
#ifdef __cplusplus
}
#endif
/* Include extra container types */
#if GWIN_NEED_FRAME || defined(__DOXYGEN__)
#include "gwin_frame.h"
#endif
#endif /* _GCONTAINER_H */
/** @} */
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