aboutsummaryrefslogtreecommitdiffstats
path: root/src/gwin/button.h
blob: dad0cc910f81bda2caec2c7cef538eea26fd2489 (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
/*
 * 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/button.h
 * @brief   GWIN Graphic window subsystem header file.
 *
 * @defgroup Button Button
 * @ingroup GWIN
 *
 * @details		GWIN allows it to easily create buttons with different styles
 *				and check for different meta states such as: PRESSED, CLICKED,
 *				RELEASED etc.
 *
 * @pre			GFX_USE_GWIN must be set to TRUE in your gfxconf.h
 * @pre			GWIN_NEED_BUTTON must be set to TRUE in your gfxconf.h
 * @{
 */

#ifndef _GWIN_BUTTON_H
#define _GWIN_BUTTON_H

/* This file is included within "gwin/gwidget.h" */

/**
 * @brief	The Event Type for a Button Event
 */
#define GEVENT_GWIN_BUTTON		(GEVENT_GWIN_FIRST+0)

/**
 * @brief	A Button Event
 * @note	There are currently no GEventGWinButton listening flags - use 0 as the flags to @p gwinAttachListener()
 */
typedef struct GEventGWinButton {
	GEventType		type;				// The type of this event (GEVENT_GWIN_BUTTON)
	GHandle			button;				// The button that has been depressed (actually triggered on release)
} GEventGWinButton;

/**
 * @brief	The button widget structure
 * @note	Do not use the members directly - treat it as a black-box.
 */
typedef struct GButtonObject {
	GWidgetObject		w;
	#if GINPUT_NEED_TOGGLE
		uint16_t		toggle;
	#endif
} GButtonObject;

#ifdef __cplusplus
extern "C" {
#endif

/**
 * @brief   Create a button 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 GButtonObject structure to initialise. If this is NULL the structure is dynamically allocated.
 * @param[in] pInit		The initialisation parameters
 *
 * @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 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 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 gwinGButtonCreate(GDisplay *g, GButtonObject *gb, const GWidgetInit *pInit);
#define gwinButtonCreate(gb, pInit)			gwinGButtonCreate(GDISP, gb, pInit)

/**
 * @brief	Is the button current pressed
 * @return	TRUE if the button is depressed
 *
 * @param[in] gh	The window handle (must be a button widget)
 *
 * @api
 */
bool_t gwinButtonIsPressed(GHandle gh);

/**
 * @brief	Some custom button drawing routines
 * @details	These function may be passed to @p gwinSetCustomDraw() to get different button drawing styles
 *
 * @param[in] gw		The widget object (in this case a button)
 * @param[in] param		A parameter passed in from the user
 *
 * @note				In your custom button 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 except for @p gwinButtonDraw_Image().
 * @note				The image custom draw function  @p gwinButtonDraw_Image() uses param to pass in the gdispImage pointer.
 * 						The image must be already opened before calling  @p gwinSetCustomDraw(). The image should be 3
 * 						times the height of the button. The button image is repeated 3 times vertically, the first (top) for
 * 						the "up" image, the 2nd for the "down" image, and the third (bottom) image for the disabled state. If
 * 						the disabled state is never going to be used then the image can be just 2 times the button height.
 * 						No checking is done to compare the size of the button to the size of the image.
 * 						Note text is drawn on top of the image.
 * @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 gwinButtonDraw_3D(GWidgetObject *gw, void *param);					// @< A standard 3D button
#if GDISP_NEED_ARC || defined(__DOXYGEN__)
	void gwinButtonDraw_Rounded(GWidgetObject *gw, void *param);		// @< A rounded rectangle button
#endif
#if GDISP_NEED_ELLIPSE || defined(__DOXYGEN__)
	void gwinButtonDraw_Ellipse(GWidgetObject *gw, void *param);		// @< A circular button
#endif
#if GDISP_NEED_CONVEX_POLYGON || defined(__DOXYGEN__)
	void gwinButtonDraw_ArrowUp(GWidgetObject *gw, void *param);		// @< An up arrow button
	void gwinButtonDraw_ArrowDown(GWidgetObject *gw, void *param);		// @< A down arrow button
	void gwinButtonDraw_ArrowLeft(GWidgetObject *gw, void *param);		// @< A left arrow button
	void gwinButtonDraw_ArrowRight(GWidgetObject *gw, void *param);		// @< A right arrow button
#endif
#if GDISP_NEED_IMAGE || defined(__DOXYGEN__)
	void gwinButtonDraw_Image(GWidgetObject *gw, void *param);			// @< An image button - see the notes above on the param.
#endif
/** @} */

#ifdef __cplusplus
}
#endif

#endif /* _GWIN_BUTTON_H */
/** @} */