aboutsummaryrefslogtreecommitdiffstats
path: root/src/gwin/gwin_radio.h
blob: 3371a9ef2de7fe7b564ff84c3085505db0167d0a (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
/*
 * 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_radio.h
 * @brief   GWIN Graphic window subsystem header file.
 *
 * @defgroup RadioButton RadioButton
 * @ingroup Widgets
 *
 * @brief		RadioButton widget.
 *
 * @details		RadioButtons need to be grouped together. This is archived by passing a group parameter through
 *				@p gwinRadioCreate().
 *
 * @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 "src/gwin/gwin_widget.h" */

/**
 * @brief	The Event Type for a Radio Event
 */
#define GEVENT_GWIN_RADIO		(GEVENT_GWIN_CTRL_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			gwin;				// The radio button that has been depressed
	#if GWIN_WIDGET_TAGS
		WidgetTag	tag;				// The radio tag
	#endif
	uint16_t		group;				// The group for this radio button
} GEventGWinRadio;

/**
 * @brief	The internal radio button object flags
 * @note	Used only for writing a custom draw routine.
 * @{
 */
#define GRADIO_FLG_PRESSED		0x01
/** @} */

/**
 * @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);

/**
 * @defgroup Renderings_Radiobutton Renderings
 *
 * @brief				Built-in rendering functions for the radiobutton widget.
 *
 * @details				These function may be passed to @p gwinSetCustomDraw() to get different radiobutton drawing styles.
 *
 * @note				In your custom radiobutton drawing function you may optionally call these
 * 						standard functions and then draw your extra details on top.
 * @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.
 *
 * @{
 */

/**
 * @brief				The default rendering function for the radiobutton widget
 *
 * @param[in] gw		The widget object (must be a button radioobject)
 * @param[in] param		A parameter passed in from the user. Ignored by this function.
 *
 * @api
 */
void gwinRadioDraw_Radio(GWidgetObject *gw, void *param);

/**
 * @brief				Renders the radiobutton in form of a regular rectangular button
 *
 * @param[in] gw		The widget object (must be a button radioobject)
 * @param[in] param		A parameter passed in from the user. Ignored by this function.
 *
 * @api
 */
void gwinRadioDraw_Button(GWidgetObject *gw, void *param);

/**
 * @brief				Used to render tabbed menus.
 *
 * @details				Multiple radiobutton widgets can be placed right next to each other and be used to implement
 *						a tabbed menu using this rendering function.
 *
 * @note				This exists for legacy reasons. Have a look at the @p Tabset widget instead.
 *
 * @param[in] gw		The widget object (must be a button radioobject)
 * @param[in] param		A parameter passed in from the user. Ignored by this function.
 *
 * @api
 */
void gwinRadioDraw_Tab(GWidgetObject *gw, void *param);
/** @} */

#ifdef __cplusplus
}
#endif

#endif /* _GWIN_RADIO_H */
/** @} */