lvgl/lv_objx/lv_rect.c

/**
 * @file lv_rect.c
 * 
 */

/*********************
 *      INCLUDES
 *********************/
#include "lv_conf.h"
#if USE_LV_RECT != 0

#include "lv_rect.h"
#include "../lv_draw/lv_draw.h"
#include "../lv_draw/lv_draw_vbasic.h"

/*********************
 *      DEFINES
 *********************/

/**********************
 *      TYPEDEFS
 **********************/

/**********************
 *  STATIC PROTOTYPES
 **********************/
static bool lv_rect_design(lv_obj_t* obj_dp, const area_t * mask_p, lv_design_mode_t mode);

/**********************
 *  STATIC VARIABLES
 **********************/
static lv_rects_t lv_rects_def =
{ .mcolor = COLOR_MAKE(0x50, 0x70, 0x90), .gcolor = COLOR_MAKE(0x20, 0x40, 0x60),
  .bcolor = COLOR_WHITE, .bwidth = 2 * LV_STYLE_MULT, .bopa = 50,
  .round = 4 * LV_STYLE_MULT, .empty = 0 };

static lv_rects_t lv_rects_transp =
{ .bwidth = 0, .empty = 0 };

static lv_rects_t lv_rects_border =
{ .bcolor = COLOR_BLACK, .bwidth = 2 * LV_STYLE_MULT, .bopa = 100,
  .round = 4 * LV_STYLE_MULT, .empty = 1 };

/**********************
 *      MACROS
 **********************/

/**********************
 *   GLOBAL FUNCTIONS
 **********************/

/*----------------- 
 * Create function
 *-----------------*/

/**
 * Create a label objects
 * @param par_dp pointer to an object, it will be the parent of the new label
 * @param copy_dp pointer to a rectangle object, if not NULL then the new object will be copied from it
 * @return pointer to the created label
 */
lv_obj_t* lv_rect_create(lv_obj_t* par_dp, lv_obj_t * copy_dp)
{
    /*Create a basic object*/
    lv_obj_t* new_obj_dp = lv_obj_create(par_dp, copy_dp);
    dm_assert(new_obj_dp);

    lv_obj_set_design_f(new_obj_dp, lv_rect_design);
    lv_obj_set_signal_f(new_obj_dp, lv_rect_signal);
    
    /*Init the new rectangle*/
    if(copy_dp == NULL) {
		lv_obj_set_style(new_obj_dp, &lv_rects_def);
    }
    /*Copy 'copy_dp' if it is not NULL*/
    else {
		lv_obj_set_style(new_obj_dp, lv_obj_get_style(copy_dp));
    }

    return new_obj_dp;
}

/**
 * Signal function of the rectangle
 * @param obj_dp pointer to a rectangle object
 * @param sign a signal type from lv_signal_t enum
 * @param param pointer to a signal specific variable
 */
bool lv_rect_signal(lv_obj_t* obj_dp, lv_signal_t sign, void * param)
{
    bool valid;

    /* Include the ancient signal function */
    valid = lv_obj_signal(obj_dp, sign, param);

    /* The object can be deleted so check its validity and then
     * make the object specific signal handling */
    if(valid != false) {
    	switch(sign) {
    		default:
    			break;
    	}
    }
    
    return valid;
}

/**
 * Return with a pointer to a built-in style and/or copy it to a variable
 * @param style a style name from lv_rects_builtin_t enum
 * @param copy_p copy the style to this variable. (NULL if unused)
 * @return pointer to an lv_rects_t style
 */
lv_rects_t * lv_rects_get(lv_rects_builtin_t style, lv_rects_t * copy_p)
{
	lv_rects_t  *style_p;

	switch(style) {
		case LV_RECTS_DEF:
			style_p = &lv_rects_def;
			break;
		case LV_RECTS_BORDER:
			style_p = &lv_rects_border;
			break;
		case LV_RECTS_TRANSP:
			style_p = &lv_rects_transp;
			break;
		default:
			style_p = NULL;
	}

	if(copy_p != NULL) {
		if(style_p != NULL) memcpy(copy_p, style_p, sizeof(lv_rects_t));
		else memcpy(copy_p, &lv_rects_def, sizeof(lv_rects_t));
	}

	return style_p;
}
/*=====================
 * Setter functions 
 *====================*/


/*=====================
 * Getter functions 
 *====================*/

/**********************
 *   STATIC FUNCTIONS
 **********************/

/**
 * Handle the drawing related tasks of the labels
 * @param obj_dp pointer to an object
 * @param mask the object will be drawn only in this area
 * @param mode LV_DESIGN_COVER_CHK: only check if the object fully covers the 'mask_p' area
 *                                  (return 'true' if yes)
 *             LV_DESIGN_DRAW: draw the object (always return 'true')
 * @param return true/false, depends on 'mode'
 */
static bool lv_rect_design(lv_obj_t* obj_dp, const area_t * mask_p, lv_design_mode_t mode)
{
    /* Because of the radius it is not sure the area is covered*/
    if(mode == LV_DESIGN_COVER_CHK) {
    	if(LV_SA(obj_dp, lv_rects_t)->empty != 0) return false;

    	uint16_t r = LV_SA(obj_dp, lv_rects_t)->round;
    	area_t area_tmp;

    	/*Check horizontally without radius*/
    	lv_obj_get_cords(obj_dp, &area_tmp);
    	area_tmp.x1 += r;
    	area_tmp.x2 -= r;
    	if(area_is_in(mask_p, &area_tmp) == true) return true;

    	/*Check vertically without radius*/
    	lv_obj_get_cords(obj_dp, &area_tmp);
    	area_tmp.y1 += r;
    	area_tmp.y2 -= r;
    	if(area_is_in(mask_p, &area_tmp) == true) return true;

    	return false;
    }
    
    opa_t opa = lv_obj_get_opa(obj_dp);
    area_t area;
    lv_obj_get_cords(obj_dp, &area);

    /*Draw the rectangle*/
    lv_draw_rect(&area, mask_p, lv_obj_get_style(obj_dp), opa);
    
    return true;
}


#endif