improve graph with tooltips, row header, and color

src/main.c

@@ -7,11 +7,11 @@
 #include "window_state.h"
 
 #define WINDOW_HEIGHT 700
-#define WINDOW_WIDTH 500
+#define WINDOW_WIDTH 550
 #define OVERLAY_HEIGHT 400
 #define OVERLAY_WIDTH 700
 
-#define NUM_WEEKS 6
+#define NUM_WEEKS 12
 
 void switch_mode(Mode mode) {
   set_mode(mode);
@@ -44,14 +44,26 @@ int distance(Cell a, Cell b) {
 #define CELL_SPACING 10
 #define CELL_SIZE 20
 time_t now;
-struct tm *local_time;
+struct tm local_time;
+
+void get_date_days_ago(int days_ago, char *buffer, size_t buffer_size) {
+  time_t raw_time;
+  struct tm *time_info;
+
+  time(&raw_time);
+  time_info = localtime(&raw_time); // caution: localtime() overwrites the static struct internally as opposed to localtime_r
+  time_info->tm_mday -= days_ago;
+  mktime(time_info);
+
+  strftime(buffer, buffer_size, "%B %d", time_info);
+}
 
 void draw_graph(int x, int y) {
   int num_columns = NUM_WEEKS;
   int num_rows = 7; // days in a week
   bool checked = false;
 
-  int cell_number_today = cell_number((Cell) {local_time->tm_wday, num_columns - 1});
+  int cell_number_today = cell_number((Cell) {local_time.tm_wday, num_columns - 1});
 
   for (int c = 0; c < num_columns; c++) {
     for (int r = 0; r < num_rows; r++) {
@@ -59,11 +71,26 @@ void draw_graph(int x, int y) {
       int curr_cell_number = cell_number(cell);
       if (curr_cell_number > cell_number_today) break;
 
+      int days_ago = cell_number_today - curr_cell_number;
+      char tooltip_text[128];
+      get_date_days_ago(days_ago, tooltip_text, sizeof(tooltip_text));
+      GuiSetTooltip(tooltip_text);
+      
       // full size of a cell is spacing * 2 + size, and then need to go little more 
-      int cell_x = CELL_SPACING + (((CELL_SPACING * 2) + CELL_SIZE) * r);
+      int cell_x = CELL_SPACING + (((CELL_SPACING * 2) + CELL_SIZE) * c);
-      int cell_y = CELL_SPACING + (((CELL_SPACING * 2) + CELL_SIZE) * c);
+      int cell_y = CELL_SPACING + (((CELL_SPACING * 2) + CELL_SIZE) * r);
-      if (GuiCheckBox((Rectangle) {cell_x + x, cell_y + y, CELL_SIZE, CELL_SIZE}, "", &checked)) {
+      
-	printf("checked row %d | column %d\n", r, c);
+      GuiSetStyle(BUTTON, BASE_COLOR_NORMAL, ColorToInt(GREEN));
+      if (GuiButton((Rectangle) {cell_x + x, cell_y + y, CELL_SIZE, CELL_SIZE}, " ")) {
+	printf("clicked row %d | column %d\n", r, c);
+      }
+
+      if (c == 0 && r == 1) {
+	GuiLabel((Rectangle) {x-5, cell_y + y, 20, 20}, "M");
+      } else if (c==0 && r== 3) {
+	GuiLabel((Rectangle) {x-5, cell_y + y, 20, 20}, "W");
+      } else if (c==0 && r == 5) {
+	GuiLabel((Rectangle) {x-5, cell_y + y, 20, 20}, "F");
       }
     }
   }
@@ -89,14 +116,12 @@ void render_window() {
     switch_mode(OVERLAY);
   }
 
-  // GuiLabelButton();
-
   char label[2048];
   sprintf(label, "%d / %d characters | Hit enter to set", (int) strlen(get_intention()), (int) get_intention_size()); 
   GuiLabel((Rectangle){ WINDOW_WIDTH / 2 - 100, (WINDOW_HEIGHT / 2) - 150, 300, 50}, label);
 
   int graph_y_offset = (WINDOW_HEIGHT / 2) + 50;
-  draw_graph(100, graph_y_offset);
+  draw_graph(20, graph_y_offset);
 }
 
 void render_overlay() {
@@ -119,14 +144,16 @@ void render_overlay() {
 
 int main(int argc, char *argv[]) {
   time(&now);
-  local_time = localtime(&now);
+  localtime_r(&now, &local_time);
-  mktime(local_time);
+  mktime(&local_time);
   
   init_window_state();
   
   printf("Welcome to Flowy.adhd\n");
 
   InitWindow(WINDOW_WIDTH, WINDOW_HEIGHT, "Flowy.adhd");
+
+  GuiEnableTooltip();
  
   while (!WindowShouldClose()) {
     BeginDrawing();