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