Text area beginned

lv_conf_temp.h

@@ -95,6 +95,8 @@
 
 #define USE_LV_BTNM		1
 
+#define USE_LV_TA		1
+
 /*==================
  *  LV APP SETTINGS 
  * =================*/

lv_objx/lv_label.c

@@ -212,6 +212,7 @@ void lv_label_set_text(lv_obj_t * obj_dp, const char * text)
 
 /**
  * Set the fix width attribute
+ * If enabled the text will be automatically broken to fit to the size
  * @param obj_dp pointer to a label object
  * @param fixw true: enable fix width for the label
  */
@@ -249,6 +250,55 @@ bool lv_label_get_fixw(lv_obj_t * obj_dp)
 }
 
 /**
+ * Get the relative x and y coordinates of a letter
+ * @param obj_dp pointer to a label object
+ * @param index index of the letter (0 ... text length)
+ * @param pos_p store the result here
+ */
+void lv_label_get_letter_pos(lv_obj_t * obj_dp, uint16_t index, point_t * pos_p)
+{
+	const char * text = lv_label_get_text(obj_dp);
+    lv_label_ext_t * ext_p = lv_obj_get_ext(obj_dp);
+    uint32_t line_start = 0;
+    uint32_t new_line_start = 0;
+    cord_t max_length = lv_obj_get_width(obj_dp);
+    lv_labels_t * labels_p = lv_obj_get_style(obj_dp);
+    const font_t * font_p = font_get(labels_p->font);
+    uint8_t letter_height = font_get_height(font_p);
+    cord_t y = 0;
+
+    /*If the fix width is not enabled the set the max length to very big */
+    if(ext_p->fixw == 0) {
+        max_length = LV_CORD_MAX;
+    }
+
+    /*Search the line of the index letter */;
+    while (text[line_start] != '\0')
+    {
+        new_line_start += txt_get_next_line(&text[line_start], font_p, labels_p->letter_space, max_length);
+        if(index < new_line_start) break; /*Lines of index letter begins at 'line_start'*/
+
+        y += letter_height + labels_p->line_space;
+        line_start = new_line_start;
+    }
+
+    /*Calculate the x coordinate*/
+    cord_t x = 0;
+    /*TODO handle 'mid'*/
+    //if(labels_p->mid == 0)
+    {
+    	uint32_t i;
+    	for(i = line_start; i < index; i++) {
+    		x += font_get_width(font_p, text[i]) + labels_p->line_space;
+    	}
+    }
+
+    pos_p->x = x + obj_dp->cords.x1;
+    pos_p->y = y + obj_dp->cords.y1;
+
+}
+
+/**
  * Return with a pointer to a built-in style and/or copy it to a variable
  * @param style a style name from lv_labels_builtin_t enum
  * @param copy_p copy the style to this variable. (NULL if unused)

lv_objx/lv_label.h

@@ -59,6 +59,7 @@ void lv_label_set_text(lv_obj_t* obj_dp, const char * text);
 void lv_label_set_fixw(lv_obj_t * obj_dp, bool fixw);
 const char * lv_label_get_text(lv_obj_t* obj_dp);
 bool lv_label_get_fixw(lv_obj_t * obj_dp);
+void lv_label_get_letter_pos(lv_obj_t * obj_dp, uint16_t index, point_t * pos_p);
 
 lv_labels_t * lv_labels_get(lv_labels_builtin_t style, lv_labels_t * copy_p);
 

lv_objx/lv_ta.c

+/**
+ * @file lv_ta.c
+ * 
+ */
+
+
+/*********************
+ *      INCLUDES
+ *********************/
+#include "lv_conf.h"
+#if USE_LV_TA != 0
+
+#include "lv_ta.h"
+
+/*********************
+ *      DEFINES
+ *********************/
+#define LV_TA_MAX_LENGTH	512
+
+/**********************
+ *      TYPEDEFS
+ **********************/
+
+/**********************
+ *  STATIC PROTOTYPES
+ **********************/
+static bool lv_ta_design(lv_obj_t* obj_dp, const area_t * mask_p, lv_design_mode_t mode);
+
+/**********************
+ *  STATIC VARIABLES
+ **********************/
+static lv_tas_t lv_tas_def =
+{ /*Create a default style*/ };
+lv_design_f_t ancestor_design_f;
+
+/**********************
+ *      MACROS
+ **********************/
+
+/**********************
+ *   GLOBAL FUNCTIONS
+ **********************/
+
+/*----------------- 
+ * Create function
+ *-----------------*/
+
+/**
+ * Create a text area objects
+ * @param par_dp pointer to an object, it will be the parent of the new text area
+ * @param copy_dp pointer to a text area object, if not NULL then the new object will be copied from it
+ * @return pointer to the created text area
+ */
+lv_obj_t* lv_ta_create(lv_obj_t* par_dp, lv_obj_t * copy_dp)
+{
+    /*Create the ancestor object*/
+    lv_obj_t* new_obj_dp = lv_page_create(par_dp, copy_dp);
+    dm_assert(new_obj_dp);
+    
+    /*Allocate the object type specific extended data*/
+    lv_ta_ext_t * ext_dp = lv_obj_alloc_ext(new_obj_dp, sizeof(lv_ta_ext_t));
+    dm_assert(ext_dp);
+
+    if(ancestor_design_f == NULL) {
+    	ancestor_design_f = lv_obj_get_design_f(new_obj_dp);
+    }
+
+    lv_obj_set_signal_f(new_obj_dp, lv_ta_signal);
+    lv_obj_set_design_f(new_obj_dp, lv_ta_design);
+
+    /*Init the new text area object*/
+    if(copy_dp == NULL) {
+    	ext_dp->label_dp = lv_label_create(new_obj_dp, NULL);
+    	lv_label_set_text(ext_dp->label_dp, "Abc def xyz\n\n\n\n\n\n\n\n\n\n\n\nghi\n\n\n\n\n\n\n\n\n\n123\n\n\n\n\n\n\n\n\n\n456\n\n\n\n\n\n789");
+    	lv_obj_set_style(ext_dp->label_dp, lv_labels_get(LV_LABELS_TXT, NULL));
+    }
+    /*Copy an existing object*/
+    else {
+
+    }
+    
+    return new_obj_dp;
+}
+
+/**
+ * Signal function of the text area
+ * @param obj_dp pointer to a text area object
+ * @param sign a signal type from lv_signal_t enum
+ * @param param pointer to a signal specific variable
+ * @return true: the object is still valid (not deleted), false: the object become invalid
+ */
+bool lv_ta_signal(lv_obj_t* obj_dp, lv_signal_t sign, void * param)
+{
+    bool valid;
+
+    /* Include the ancient signal function */
+    valid = lv_page_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) {
+    		case LV_SIGNAL_CLEANUP:
+    			/*Nothing to cleanup. (No dynamically allocated memory in 'ext')*/
+    			break;
+    		default:
+    			break;
+    	}
+    }
+    
+    return valid;
+}
+
+/*=====================
+ * Setter functions
+ *====================*/
+
+void lv_ta_set_cursor_pos(lv_obj_t * obj_dp, uint16_t pos)
+{
+
+	lv_ta_ext_t * ta_dp = lv_obj_get_ext(obj_dp);
+	ta_dp->cursor_pos = pos;
+
+	lv_obj_inv(obj_dp);
+}
+
+/*=====================
+ * Getter functions
+ *====================*/
+
+/**
+ * Return with a pointer to a built-in style and/or copy it to a variable
+ * @param style a style name from lv_tas_builtin_t enum
+ * @param copy_p copy the style to this variable. (NULL if unused)
+ * @return pointer to an lv_tas_t style
+ */
+lv_tas_t * lv_tas_get(lv_tas_builtin_t style, lv_tas_t * copy_p)
+{
+	lv_tas_t  *style_p;
+
+	switch(style) {
+		case LV_TAS_DEF:
+			style_p = &lv_tas_def;
+			break;
+		default:
+			style_p = &lv_tas_def;
+	}
+
+	if(copy_p != NULL) {
+		if(style_p != NULL) memcpy(copy_p, style_p, sizeof(lv_tas_t));
+		else memcpy(copy_p, &lv_tas_def, sizeof(lv_tas_t));
+	}
+
+	return style_p;
+}
+
+uint16_t lv_ta_get_cursor_pos(lv_obj_t * obj_dp)
+{
+	lv_ta_ext_t * ta_dp = lv_obj_get_ext(obj_dp);
+	return ta_dp->cursor_pos;
+}
+/**********************
+ *   STATIC FUNCTIONS
+ **********************/
+
+
+/**
+ * Handle the drawing related tasks of the text areas
+ * @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_ta_design(lv_obj_t* obj_dp, const area_t * mask_p, lv_design_mode_t mode)
+{
+    if(mode == LV_DESIGN_COVER_CHK) {
+    	/*Return false if the object is not covers the mask_p area*/
+    	return ancestor_design_f(obj_dp, mask_p, mode);
+    }
+
+    /*Draw the object*/
+    ancestor_design_f(obj_dp, mask_p, mode);
+
+    lv_ta_ext_t * ta_dp = lv_obj_get_ext(obj_dp);
+    uint16_t cur_pos = lv_ta_get_cursor_pos(obj_dp);
+    point_t letter_pos;
+    lv_label_get_letter_pos(ta_dp->label_dp, cur_pos, &letter_pos);
+
+    area_t cur_area;
+    lv_labels_t * label_p = lv_obj_get_style(ta_dp->label_dp);
+    cur_area.x1 = letter_pos.x;
+    cur_area.y1 = letter_pos.y;
+    cur_area.x2 = letter_pos.x + 4;
+    cur_area.y2 = letter_pos.y + font_get_height(font_get(label_p->font));
+
+    lv_rects_t rects;
+    lv_rects_get(LV_RECTS_DEF, &rects);
+    rects.round = 0;
+    rects.bwidth = 0;
+    rects.objs.color = COLOR_RED;
+    rects.gcolor = COLOR_RED;
+    lv_draw_rect(&cur_area, mask_p, &rects, OPA_COVER);
+
+    return true;
+}
+
+
+#endif

lv_objx/lv_ta.h

+/**
+ * @file lv_ta.h
+ * 
+ */
+
+#ifndef LV_TA_H
+#define LV_TA_H
+
+/*********************
+ *      INCLUDES
+ *********************/
+#include "lv_conf.h"
+#if USE_LV_TA != 0
+
+#include "../lv_obj/lv_obj.h"
+#include "lv_page.h"
+#include "lv_label.h"
+
+/*********************
+ *      DEFINES
+ *********************/
+
+/**********************
+ *      TYPEDEFS
+ **********************/
+
+/*Style of text area*/
+typedef struct
+{
+	lv_pages_t pages;	/*Style of ancestor*/
+	/*New style element for this type */
+	lv_labels_t labels;
+	uint8_t cursor_show :1;
+}lv_tas_t;
+
+/*Built-in styles of text area*/
+typedef enum
+{
+	LV_TAS_DEF,
+}lv_tas_builtin_t;
+
+/*Data of text area*/
+typedef struct
+{
+	lv_page_ext_t page; /*Ext. of ancestor*/
+	/*New data for this type */
+	lv_obj_t * label_dp;
+	uint16_t cursor_pos;
+}lv_ta_ext_t;
+
+/**********************
+ * GLOBAL PROTOTYPES
+ **********************/
+lv_obj_t* lv_ta_create(lv_obj_t* par_dp, lv_obj_t * copy_dp);
+bool lv_ta_signal(lv_obj_t* obj_dp, lv_signal_t sign, void * param);
+lv_tas_t * lv_tas_get(lv_tas_builtin_t style, lv_tas_t * copy_p);
+
+void lv_ta_add_char(lv_obj_t * obj_dp, char c);
+void lv_ta_set_cursor_pos(lv_obj_t * obj_dp, uint16_t pos);
+
+
+const char * lv_ta_get_txt(lv_obj_t obj_dp);
+uint16_t lv_ta_get_cursor_pos(lv_obj_t * obj_dp);
+
+
+/**********************
+ *      MACROS
+ **********************/
+
+#endif
+
+#endif

lvgl.h

@@ -22,6 +22,7 @@
 #include "lv_objx/lv_pb.h"
 #include "lv_objx/lv_led.h"
 #include "lv_objx/lv_btnm.h"
+#include "lv_objx/lv_ta.h"
 
 /*********************
  *      DEFINES