137 lines
5.3 KiB
C
137 lines
5.3 KiB
C
/*
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* This file is subject to the terms of the GFX License. If a copy of
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* the license was not distributed with this file, you can obtain one at:
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*
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* http://ugfx.org/license.html
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*/
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/**
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* @file include/gwin/button.h
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* @brief GWIN Graphic window subsystem header file.
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*
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* @defgroup Button Button
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* @ingroup GWIN
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*
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* @details GWIN allows it to easily create buttons with different styles
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* and check for different meta states such as: PRESSED, CLICKED,
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* RELEASED etc.
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*
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* @pre GFX_USE_GWIN must be set to TRUE in your gfxconf.h
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* @pre GWIN_NEED_BUTTON must be set to TRUE in your gfxconf.h
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* @{
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*/
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#ifndef _GWIN_BUTTON_H
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#define _GWIN_BUTTON_H
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/* This file is included within "gwin/gwidget.h" */
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/**
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* @brief The Event Type for a Button Event
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*/
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#define GEVENT_GWIN_BUTTON (GEVENT_GWIN_FIRST+0)
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/**
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* @brief A Button Event
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* @note There are currently no GEventGWinButton listening flags - use 0 as the flags to @p gwinAttachListener()
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*/
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typedef struct GEventGWinButton {
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GEventType type; // The type of this event (GEVENT_GWIN_BUTTON)
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GHandle button; // The button that has been depressed (actually triggered on release)
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} GEventGWinButton;
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/**
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* @brief The button widget structure
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* @note Do not use the members directly - treat it as a black-box.
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*/
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typedef struct GButtonObject {
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GWidgetObject w;
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#if GINPUT_NEED_TOGGLE
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uint16_t toggle;
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#endif
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} GButtonObject;
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* @brief Create a button widget.
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* @return NULL if there is no resultant drawing area, otherwise a window handle.
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*
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* @param[in] gb The GButtonObject structure to initialise. If this is NULL the structure is dynamically allocated.
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* @param[in] pInit The initialisation parameters
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*
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* @note The drawing color and the background color get set to the current defaults. If you haven't called
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* @p gwinSetDefaultColor() or @p gwinSetDefaultBgColor() then these are White and Black respectively.
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* @note The font gets set to the current default font. If you haven't called @p gwinSetDefaultFont() then there
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* is no default font and text drawing operations will no nothing.
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* @note A button remembers its normal drawing state. If there is a window manager then it is automatically
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* redrawn if the window is moved or its visibility state is changed.
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* @note A button supports mouse and a toggle input.
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* @note When assigning a toggle, only one toggle is supported. If you try to assign more than one toggle it will
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* forget the previous toggle. When assigning a toggle the role parameter must be 0.
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*
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* @api
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*/
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GHandle gwinButtonCreate(GButtonObject *gb, const GWidgetInit *pInit);
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/**
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* @brief Is the button current pressed
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* @return TRUE if the button is depressed
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*
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* @param[in] gh The window handle (must be a button widget)
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*
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* @api
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*/
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bool_t gwinButtonIsPressed(GHandle gh);
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/**
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* @brief Some custom button drawing routines
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* @details These function may be passed to @p gwinSetCustomDraw() to get different button drawing styles
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*
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* @param[in] gw The widget object (in this case a button)
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* @param[in] param A parameter passed in from the user
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*
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* @note In your custom button drawing function you may optionally call these
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* standard functions and then draw your extra details on top.
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* @note The standard functions below ignore the param parameter except for @p gwinButtonDraw_Image().
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* @note The image custom draw function @p gwinButtonDraw_Image() uses param to pass in the gdispImage pointer.
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* The image must be already opened before calling @p gwinSetCustomDraw(). The image should be 3
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* times the height of the button. The button image is repeated 3 times vertically, the first (top) for
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* the "up" image, the 2nd for the "down" image, and the third (bottom) image for the disabled state. If
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* the disabled state is never going to be used then the image can be just 2 times the button height.
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* No checking is done to compare the size of the button to the size of the image.
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* Note text is drawn on top of the image.
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* @note These custom drawing routines don't have to worry about setting clipping as the framework
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* sets clipping to the object window prior to calling these routines.
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*
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* @api
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* @{
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*/
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void gwinButtonDraw_3D(GWidgetObject *gw, void *param); // @< A standard 3D button
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#if GDISP_NEED_ARC || defined(__DOXYGEN__)
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void gwinButtonDraw_Rounded(GWidgetObject *gw, void *param); // @< A rounded rectangle button
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#endif
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#if GDISP_NEED_ELLIPSE || defined(__DOXYGEN__)
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void gwinButtonDraw_Ellipse(GWidgetObject *gw, void *param); // @< A circular button
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#endif
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#if GDISP_NEED_CONVEX_POLYGON || defined(__DOXYGEN__)
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void gwinButtonDraw_ArrowUp(GWidgetObject *gw, void *param); // @< An up arrow button
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void gwinButtonDraw_ArrowDown(GWidgetObject *gw, void *param); // @< A down arrow button
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void gwinButtonDraw_ArrowLeft(GWidgetObject *gw, void *param); // @< A left arrow button
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void gwinButtonDraw_ArrowRight(GWidgetObject *gw, void *param); // @< A right arrow button
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#endif
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#if GDISP_NEED_IMAGE || defined(__DOXYGEN__)
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void gwinButtonDraw_Image(GWidgetObject *gw, void *param); // @< An image button - see the notes above on the param.
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#endif
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/** @} */
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#ifdef __cplusplus
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}
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#endif
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#endif /* _GWIN_BUTTON_H */
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/** @} */
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