chart...

grid ready


git-svn-id: file:///home/jan/tmp/wetterstation/trunk@91 dd492736-c11a-0410-ad51-8c26713eaf7f

cronjob/chart/image_file/image_common.h

@@ -27,6 +27,7 @@ typedef struct image_cfg {
   img_color_ptr dia_grid_color;
   img_color_ptr dia_border_color;
   img_color_ptr zero_line_color;
+  img_color_ptr label_color;
 
 
 

cronjob/chart/image_file/image_config.c

@@ -58,6 +58,7 @@ static const config_keyword keywords[] = {
   {"dia_grid_color",	read_color,             &(img_cfg.dia_grid_color),		""},
   {"dia_border_color",	read_color,             &(img_cfg.dia_border_color),		""},
   {"zero_line_color",	read_color,             &(img_cfg.zero_line_color),   		""},
+  {"label_color",	read_color,             &(img_cfg.label_color),   		""},
 
   {"",			NULL, 	  		NULL,					""}
 };

cronjob/chart/image_file/image_data.c

@@ -15,6 +15,8 @@
 
 static pix_list_ptr min = NULL;
 static pix_list_ptr max = NULL;
+double real_min = 0;
+double real_max = 0;
 static long base_time;									/* Zeit an der 0-Koordinate (lt. Datenbank!) */
 
 
@@ -25,6 +27,94 @@ static PGresult *pg_check_exec(PGconn *, char *);
 static char *get_type_table_by_id(PGconn *, int );
 
 
+
+label_list_ptr get_y_label_list(int c_hight, int padding, int zero_min){
+  int max_val = ceil( ( ((double)max->value_sum) / ((double)max->value_count) ) * img_cfg.val_koeff);
+  int min_val = floor( ( ((double)min->value_sum) / ((double)min->value_count) ) * img_cfg.val_koeff);
+  double factor = 0;
+  int diff = 0;
+  double real_diff = 0;
+  double padd_val = 0;
+  int temp = 0; 
+  double koeff = 1;
+  int interval = 0;
+  int num = 0;
+  int i;
+  int new_val = 0;
+  char * buff = NULL;
+
+  label_list_ptr ptr      = NULL;
+  label_list_ptr new_ptr  = NULL;
+  label_list_ptr temp_ptr = NULL;
+
+
+  DEBUGOUT1("\nBaue y-Labels...\n");
+  DEBUGOUT4(" Max. Wert: %d, Min. Wert: %d (inkl. Koeffizient: %3.3f)\n", max_val, min_val, img_cfg.val_koeff);
+
+  if (zero_min){
+    min_val = 0;
+  }
+
+  diff = max_val - min_val;
+
+  factor =  ( ((double)c_hight - (2 * padding)) / ((double)diff) );
+
+  padd_val = (1 / factor) * ((double)padding); 
+
+  real_min = min_val - padd_val;
+  real_max = max_val + padd_val; 
+  real_diff = real_max - real_min;  
+
+  DEBUGOUT4(" Realer Max. Wert: %3.3f, Realer Min. Wert: %3.3f (inkl. Koeffizient: %3.3f)\n", real_max, real_min, img_cfg.val_koeff);
+
+  temp = floor( ((double)diff) * 0.1);
+
+  while (temp >= 10) {
+    koeff = koeff * 0.1;
+    temp = floor(koeff * ((double)temp));
+  }
+
+  interval = temp / koeff;
+
+  num = floor( real_diff / interval );
+
+  DEBUGOUT2(" Interval: %d \n", interval);
+
+  temp = ceil(real_min);
+  
+  
+  buff = malloc(sizeof(char)*BUFFSIZE);
+
+  for (i = 0; i < num; i++){
+    new_val = temp + (i * interval);    
+    snprintf(buff, BUFFSIZE, "%d", new_val);
+
+    new_ptr            = malloc(sizeof(label_list_t));
+    new_ptr->pos       = floor( (real_max -  ((double)new_val) ) * factor);
+    new_ptr->value     = new_val;
+    new_ptr->text      = strdup(buff);
+    new_ptr->next      = NULL;
+
+    if (ptr != NULL){
+      temp_ptr->next = new_ptr;
+      temp_ptr       = temp_ptr->next;
+    } else {
+      ptr      = new_ptr;
+      temp_ptr = new_ptr;
+    }
+
+    DEBUGOUT3("  Label '%s' an Position %d\n", new_ptr->text, new_ptr->pos);
+  }
+
+  free(buff);
+
+  DEBUGOUT2(" %d Labels generiert\n", num);
+
+  return ptr;
+
+}
+
+
 /* Baut die Liste mit den Labels an der X-Achse */
 label_list_ptr get_x_label_list(int c_width){
   double factor = ((double)img_cfg.label_interval) * ( ((double)c_width) / ((double)img_cfg.show_interval) );
@@ -34,10 +124,12 @@ label_list_ptr get_x_label_list(int c_width){
   label_list_ptr new_ptr  = NULL;
   label_list_ptr temp_ptr = NULL;
 
+  DEBUGOUT1("\nBaue x-Labels...\n");
+
   for ( i = 1; i < num; i++ ) {
     new_ptr            = malloc(sizeof(label_list_t));
     new_ptr->pos       = floor( ((double)i) * factor);
-    new_ptr->timestamp = base_time + (i * img_cfg.label_interval);
+    new_ptr->value     = base_time + (i * img_cfg.label_interval);
     new_ptr->text      = "NOT YET IMPLEMENTED";
     new_ptr->next      = NULL;
 
@@ -48,30 +140,39 @@ label_list_ptr get_x_label_list(int c_width){
       ptr      = new_ptr;
       temp_ptr = new_ptr;
     }
+
+    DEBUGOUT3("  Label '%s' an Position %d\n", new_ptr->text, new_ptr->pos);
   }
 
+  DEBUGOUT2(" %d Labels generiert\n", num); 
+
   return ptr;
 }
 
 
 /* Skaliert die X-Koordinaten der Punkte im angegebenem Bereich
  * ausführliche Beschreibung im header-file */
-int scale_y_coords(pix_list_ptr ptr, int c_height, int max_label, int min_label){
-  int range            = (max_label - min_label + 1) ;				/* Anzahl von 0,1-Schritten */
+int scale_y_coords(pix_list_ptr ptr, int c_height){
+  double range            = (((real_max - real_min) / img_cfg.val_koeff ) + 1) ;				/* Anzahl von 0,1-Schritten */
   double pix_per_scale = ((double)c_height) / ((double)range); 				/* Pixel pro 0,1 */
   pix_list_ptr temp    = ptr;
-  int zero_line        = floor( ((double)(max_label + 1)) * pix_per_scale);			/* Nullinie */
+  int zero_line        = floor( ((double)((real_max  / img_cfg.val_koeff) + 1)) * pix_per_scale);			/* Nullinie */
   
   DEBUGOUT1("\nBerechne y-Koordinaten:\n");
 
   for (; temp; temp = temp->next){
-    temp->y_pix_coord = -1 * floor( ( ((double)temp->value_sum) / ((double)temp->value_count) ) * pix_per_scale);
+    temp->y_pix_coord = (-1 * floor( ( ((double)temp->value_sum) / ((double)temp->value_count) ) * pix_per_scale)) + zero_line;
     DEBUGOUT3("  neue y-Koordinate: %d bei x: %d\n",temp->y_pix_coord, temp->x_pix_coord);
   }
 
-  DEBUGOUT2(" Nullinie bei: %d\n", zero_line);
+    DEBUGOUT2(" Nullinie bei: %d\n", zero_line);
+
+  if ((real_max - real_min + 1) >= real_max){
+    return zero_line;
+  } else {
+    return -1;
+  }
 
-  return zero_line;
 }
 
 /* Maximaler wert */

cronjob/chart/image_file/image_data.h

@@ -13,7 +13,7 @@ typedef struct pix_list {
 typedef struct label_list *label_list_ptr;
 typedef struct label_list {
   int  		 pos;
-  long 		 timestamp;
+  long 		 value;
   char 		 *text;
   label_list_ptr next;
 } label_list_t;
@@ -38,15 +38,15 @@ pix_list_ptr get_max();
 /* Skaliert die X-Koordinaten der Punkte im angegebenem Bereich
  * 1. Argument: die Pix-Liste die skaliert werden soll
  * 2. Argument: die anzahl der Pixel in y-Richtung
- * 3. Argument: max. Wert
- * 4. Argument: min. Wert
- * Rueckgabe: Position der 0-Linie von oben aus
+ * Rueckgabe:   Position der nullinie. (wenn nicht sichtbar -1)
  */
-int scale_y_coords(pix_list_ptr , int , int , int );
+int scale_y_coords(pix_list_ptr , int );
 
 
 /* Baut die Liste mit den Labels an der X-Achse 
  * 1. Argument: Breite des bildes
  * Rueckgabe: List mit den Labels
  */
-label_list_ptr get_x_label_list(int c_width);
+label_list_ptr get_x_label_list(int );
+
+label_list_ptr get_y_label_list(int, int, int);

cronjob/chart/image_file/image_draw.c

@@ -49,6 +49,7 @@ static gdImagePtr draw_image(gdImagePtr img){
   int dia_width		= img_cfg.width - offset_x_left - offset_x_right;
   int dia_height 	= img_cfg.height - offset_y_top - offset_y_bottom;
   int zero_line 	= 0;
+  int dia_y_padding	= 10;
 
   color val_line_c 	= alloc_alpha_color(img, img_cfg.dia_line_color);
   color zero_line_c	= alloc_alpha_color(img, img_cfg.zero_line_color);
@@ -58,23 +59,35 @@ static gdImagePtr draw_image(gdImagePtr img){
   /* Werte holen */
   pix_list = get_pix_list(dia_width);
 
-  /* y-Werte skalieren */
-  zero_line = scale_y_coords(pix_list, dia_height, 400, -100);  
   
 
-  x_labels = get_x_label_list(dia_width);
+
+  
+
+
 
 
   /* Diagramhintergrund */
   gdImageFilledRectangle(img, offset_x_left, offset_y_top, img_cfg.width - offset_x_right, img_cfg.height - offset_y_bottom, dia_bg_c);
 
+
+  y_labels = get_y_label_list(dia_height, dia_y_padding, 0);
+  for (; y_labels; y_labels = y_labels->next){
+    gdImageLine(img, offset_x_left, offset_y_top + y_labels->pos, img_cfg.width - offset_x_right, offset_y_top + y_labels->pos, diag_grid_c);
+  }
+
+  /* y-Werte skalieren */
+  zero_line = scale_y_coords(pix_list, dia_height);  
+
   /* Vertikale linien + x - Labels*/
+  x_labels = get_x_label_list(dia_width);
   for(; x_labels; x_labels = x_labels->next){
     gdImageLine(img, offset_x_left + x_labels->pos, offset_y_top, offset_x_left + x_labels->pos, img_cfg.height - offset_y_bottom, diag_grid_c);
   }
 
   /* Nullinie */
-  gdImageLine(img, offset_x_left, zero_line + offset_y_top, img_cfg.width - offset_x_right, zero_line + offset_y_top, zero_line_c); 
+  if (zero_line != -1)
+    gdImageLine(img, offset_x_left, zero_line + offset_y_top, img_cfg.width - offset_x_right, zero_line + offset_y_top, zero_line_c); 
 
 
   /* Werte Zeichnen */

cronjob/chart/image_file/testimage.conf

@@ -3,7 +3,7 @@ headline		Testbild
 manual_table		no
 manual_table_name	auss2_data
 table_field		temp
-gen_interval		15
+gen_interval		1
 show_interval		10d	
 label_interval		1d
 label_sum   		no
@@ -18,5 +18,5 @@ zero_line_color		BF:80:80:40  #test
 dia_line_color		60:30:50:30  #test
 dia_grid_color		00:00:00:EF  #test
 dia_border_color	60:30:50:af  #test
-#dia_color		60:30:50:af  #test
+label_color		60:30:50:af  #test
 #dia_color		60:30:50:af  #test