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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/radio.h
* @brief GWIN Graphic window subsystem header file.
*
* @defgroup RadioButton RadioButton
* @ingroup Widgets
*
* @details GWIN allows it to easily create radio buttons with different styles.
*
* @pre GFX_USE_GWIN must be set to TRUE in your gfxconf.h
* @pre GWIN_NEED_RADIO must be set to TRUE in your gfxconf.h
* @{
*/
#ifndef _GWIN_RADIO_H
#define _GWIN_RADIO_H
/* This file is included within "gwin/gwidget.h" */
/**
* @brief The Event Type for a Radio Event
*/
#define GEVENT_GWIN_RADIO (GEVENT_GWIN_FIRST+3)
/**
* @brief A Button Event
* @note There are currently no GEventGWinRadio listening flags - use 0 as the flags to @p gwinAttachListener()
*/
typedef struct GEventGWinRadio {
GEventType type; // The type of this event (GEVENT_GWIN_RADIO)
GHandle radio; // The radio button that has been depressed
uint16_t group; // The group for this radio button
#if GWIN_WIDGET_TAGS
WidgetTag tag; // The radio tag
#endif
} GEventGWinRadio;
/**
* @brief The radio button widget structure
* @note Do not use the members directly - treat it as a black-box.
*/
typedef struct GRadioObject {
GWidgetObject w;
#if GINPUT_NEED_TOGGLE
uint16_t toggle;
#endif
uint16_t group;
} GRadioObject;
#ifdef __cplusplus
extern "C" {
#endif
/**
* @brief Create a radio widget.
* @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 GRadioObject structure to initialise. If this is NULL the structure is dynamically allocated.
* @param[in] pInit The initialisation parameters
* @param[in] group The group of radio buttons this radio button belongs to.
*
* @note Only one radio button in any group is ever pressed at one time. Pressing one radio button will
* release all others in the group.
* @note The drawing color and the background color get set to the current defaults. If you haven't called
* @p gwinSetDefaultColor() or @p gwinSetDefaultBgColor() then these are White and Black respectively.
* @note The font gets set to the current default font. If you haven't called @p gwinSetDefaultFont() then there
* is no default font and text drawing operations will no nothing.
* @note A radio button remembers its normal drawing state. If there is a window manager then it is automatically
* redrawn if the window is moved or its visibility state is changed.
* @note A radio button supports mouse and a toggle input.
* @note When assigning a toggle, only one toggle is supported. If you try to assign more than one toggle it will
* forget the previous toggle. When assigning a toggle the role parameter must be 0.
*
* @api
*/
GHandle gwinGRadioCreate(GDisplay *g, GRadioObject *gb, const GWidgetInit *pInit, uint16_t group);
#define gwinRadioCreate(w, pInit, gr) gwinGRadioCreate(GDISP, w, pInit, gr)
/**
* @brief Press this radio button (and by definition unset any others in the group)
*
* @param[in] gh The window handle (must be a radio widget)
*
* @api
*/
void gwinRadioPress(GHandle gh);
/**
* @brief Is the radio button currently pressed
* @return TRUE if the button is pressed
*
* @param[in] gh The window handle (must be a radio widget)
*
* @api
*/
bool_t gwinRadioIsPressed(GHandle gh);
/**
* @brief Find the currently pressed radio button in the specified group
* @return The handle of the pressed radio button or NULL if none are pressed
*
* @param[in] group The radio button group to be examined
*
* @return The handle of the currently pressed radio button
*
* @api
*/
GHandle gwinRadioGetActive(uint16_t group);
/**
* @brief Some custom radio button drawing routines
* @details These function may be passed to @p gwinSetCustomDraw() to get different radio button drawing styles
*
* @param[in] gw The widget object (in this case a radio button)
* @param[in] param A parameter passed in from the user
*
* @note In your custom radio drawing function you may optionally call these
* standard functions and then draw your extra details on top.
* @note The standard functions below ignore the param parameter.
* @note These custom drawing routines don't have to worry about setting clipping as the framework
* sets clipping to the object window prior to calling these routines.
*
* @api
* @{
*/
void gwinRadioDraw_Radio(GWidgetObject *gw, void *param); // @< A standard radio button
void gwinRadioDraw_Button(GWidgetObject *gw, void *param); // @< Draw as a button
void gwinRadioDraw_Tab(GWidgetObject *gw, void *param); // @< Draw as a tab
/** @} */
#ifdef __cplusplus
}
#endif
#endif /* _GWIN_RADIO_H */
/** @} */
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