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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/slider.h
* @brief GWIN Graphic window subsystem header file.
*
* @defgroup Slider Slider
* @ingroup Widgets
*
* @details Create sliders with different styles
*
* @pre GFX_USE_GWIN must be set to TRUE in your gfxconf.h
* @pre GWIN_NEED_SLIDER must be set to TRUE in your gfxconf.h
* @{
*/
#ifndef _GWIN_SLIDER_H
#define _GWIN_SLIDER_H
/* This file is included within "gwin/gwidget.h" */
#define GEVENT_GWIN_SLIDER (GEVENT_GWIN_FIRST+1)
typedef struct GEventGWinSlider {
GEventType type; // The type of this event (GEVENT_GWIN_BUTTON)
GHandle slider; // The slider that is returning results
int position;
#if GWIN_WIDGET_TAGS
WidgetTag tag; // The slider tag
#endif
} GEventGWinSlider;
// There are currently no GEventGWinSlider listening flags - use 0
// A slider window
typedef struct GSliderObject {
GWidgetObject w;
#if GINPUT_NEED_TOGGLE
uint16_t t_dn;
uint16_t t_up;
#endif
#if GINPUT_NEED_DIAL
uint16_t dial;
#endif
coord_t dpos;
int min;
int max;
int pos;
} GSliderObject;
#ifdef __cplusplus
extern "C" {
#endif
/**
* @brief Create a slider window.
* @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 GSliderObject structure to initialise. If this is NULL the structure is dynamically allocated.
* @param[in] pInit The initialization parameters to use
*
* @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 slider 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 The initial slider range is from 0 to 100 with an initial position of 0.
* @note A slider supports mouse, toggle and dial input.
* @note When assigning a toggle, only one toggle is supported per role. If you try to assign more than
* one toggle to a role it will forget the previous toggle. Two roles are supported:
* Role 0 = toggle for down, Role 1 = toggle for up.
* @note When assigning a dial, only one dial is supported. If you try to assign more than one dial
* it will forget the previous dial. Only dial role 0 is supported.
*
* @api
*/
GHandle gwinGSliderCreate(GDisplay *g, GSliderObject *gb, const GWidgetInit *pInit);
#define gwinSliderCreate(w, pInit) gwinGSliderCreate(GDISP, w, pInit)
/**
* @brief Set the slider range.
*
* @param[in] gh The window handle (must be a slider window)
* @param[in] min The minimum value
* @param[in] max The maximum value
* @note Sets the position to the minimum value.
* @note The slider is not automatically drawn. Call gwinSliderDraw() after changing the range.
*
* @api
*/
void gwinSliderSetRange(GHandle gh, int min, int max);
/**
* @brief Set the slider position.
*
* @param[in] gh The window handle (must be a slider window)
* @param[in] pos The new position
* @note If the new position is outside the slider range then the position
* is set to the closest end of the range.
* @note The slider is not automatically drawn. Call gwinSliderDraw() after changing the position.
*
* @api
*/
void gwinSliderSetPosition(GHandle gh, int pos);
/**
* @brief Get the current slider position.
* @return The slider position
*
* @param[in] gh The window handle (must be a slider window)
*
* @note The use of a listener to get the slider position is recommended if you
* want continuous updates on the slider position.
*
* @api
*/
#define gwinSliderGetPosition(gh) (((GSliderObject *)(gh))->pos)
/**
* @brief Some custom slider drawing routines
* @details These function may be passed to @p gwinSetCustomDraw() to get different slider drawing styles
*
* @param[in] gw The widget (which must be a slider)
* @param[in] param A parameter passed in from the user
*
* @note In your custom slider drawing function you may optionally call this
* standard functions and then draw your extra details on top.
* @note The standard functions below ignore the param parameter except for @p gwinSliderDraw_Image().
* @note The image custom draw function @p gwinSliderDraw_Image() uses param to pass in the gdispImage pointer.
* The image must be already opened before calling @p gwinSetCustomDraw(). The image is tiled to fill
* the active area of the slider. The normal colors apply to the border and inactive area and the dividing line
* between the active and inactive areas.
* No checking is done to compare the dimensions of the slider 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 gwinSliderDraw_Std(GWidgetObject *gw, void *param);
void gwinSliderDraw_Image(GWidgetObject *gw, void *param);
/** @} */
#ifdef __cplusplus
}
#endif
#endif /* _GWIN_SLIDER_H */
/** @} */
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