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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/gwin_label.h
* @brief GWIN label widget header file
*
* @defgroup Label Label
* @ingroup Widgets
*
* @brief Simple label widget.
*
* @details Setting the dimensions of the widget to 0 will automatically
* set the labels dimensions to fit the entire text. Note that the
* dimensions of the label will change every time the text is changed
* through gwinSetText().
*
* @pre GFX_USE_GDISP must be set to TRUE in your gfxconf.h
* @pre GFX_USE_GWIN must be set to TRUE in your gfxconf.h
* @pre GDISP_NEED_TEXT must be set to TRUE in your gfxconf.h
* @pre GWIN_NEED_LABEL must be set to TRUE in your gfxconf.h
* @pre The fonts you want to use must be enabled in your gfxconf.h
*
* @{
*/
#ifndef _GWIN_LABEL_H
#define _GWIN_LABEL_H
// This file is included within "src/gwin/gwin_widget.h"
/**
* @brief The internal label flags
* @note Used only for writing a custom draw routine.
* @{
*/
#define GLABEL_FLG_WAUTO 0x01
#define GLABEL_FLG_HAUTO 0x02
#define GLABEL_FLG_BORDER 0x04
/** @} */
// An label window
typedef struct GLabelObject {
GWidgetObject w;
#if GWIN_LABEL_ATTRIBUTE
coord_t tab;
const char* attr;
#endif
} GLabelObject;
#ifdef __cplusplus
extern "C" {
#endif
/**
* @brief Create a label widget.
* @details A label widget is a simple window which has a static text.
*
* @param[in] g The GDisplay to display this window on
* @param[in] widget The label structure to initialise. If this is NULL, the structure is dynamically allocated.
* @param[in] pInit The initialisation parameters to use.
*
* @return NULL if there is no resultat drawing area, otherwise the widget handle.
*
* @api
*/
GHandle gwinGLabelCreate(GDisplay *g, GLabelObject *widget, GWidgetInit *pInit);
#define gwinLabelCreate(w, pInit) gwinGLabelCreate(GDISP, w, pInit)
/**
* @brief Border settings for the default rendering routine
*
* @param[in] gh The widget handle (must be a label handle)
* @param[in] border Shall a border be rendered?
*
* @api
*/
void gwinLabelSetBorder(GHandle gh, bool_t border);
#if GWIN_LABEL_ATTRIBUTE || defined(__DOXYGEN__)
/**
* @brief Add an text attribute in front of the normal label text
* @details Often you want to display a text like this:
* Current IP: 192.168.1.42
* In that case, the actual IP will be variable, the text in front of it
* always remains the same. The static text is called the attribute and can be
* set using this function.
* Furthermore, the tab can be set in order to vertically align multiple labels.
* Please check out the website for further explanation, illustraions and usage
* examples.
*
* @note The attribute text is not copied into private memory and so it
* must be a constant string, not one allocated in a stack buffer.
* @note Use of this construct is discouraged. The appropriate way is to
* create two labels - one for the static text and one for the
* dynamic text.
*
* @param[in] gh The widget handle (must be a label handle)
* @param[in] tab The distance of the label text from the left widget edge
* @param[in] attr The attribute to be displayed
*
* @api
*/
void gwinLabelSetAttribute(GHandle gh, coord_t tab, const char* attr);
#endif
/**
* @defgroup Renderings_Label Renderings
*
* @brief Built-in rendering functions for the label widget.
*
* @details These function may be passed to @p gwinSetCustomDraw() to get different label drawing styles.
*
* @note In your custom label drawing function you may optionally call these
* standard functions and then draw your extra details on top.
* @note The built-in functions below ignore the param parameter.
* @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 Renders a label with the text left jestified.
*
* @note This is the default rendering function.
*
* @param[in] gw The widget object (must be a label object)
* @param[in] param A parameter passed in from the user. Ignored by this function.
*
* @api
*/
void gwinLabelDrawJustifiedLeft(GWidgetObject *gw, void *param);
/**
* @brief Renders a label with the text right jestified.
*
* @param[in] gw The widget object (must be a label object)
* @param[in] param A parameter passed in from the user. Ignored by this function.
*
* @api
*/
void gwinLabelDrawJustifiedRight(GWidgetObject *gw, void *param);
/**
* @brief Renders a label with the text center jestified.
*
* @param[in] gw The widget object (must be a label object)
* @param[in] param A parameter passed in from the user. Ignored by this function.
*
* @api
*/
void gwinLabelDrawJustifiedCenter(GWidgetObject *gw, void *param);
/** @} */
#ifdef __cplusplus
}
#endif
#endif // _GWIN_LABEL_H
/** @} */
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