add possibility to clear bars

due_obd2/bars.cpp

@@ -1,6 +1,6 @@
 #include "bars.h"
 
-void draw_bar_horizontal(int start_x, int start_y, int width, int height, int value, int max_value, uint color, char fill_outline, UTFT *display)
+void bar_draw_horizontal(int start_x, int start_y, int width, int height, int value, int max_value, uint color, char fill_outline, UTFT *display)
 {
     display->setColor(color);
     int bar_width = (int)((float)value / (float)max_value * width);
@@ -11,7 +11,7 @@ void draw_bar_horizontal(int start_x, int start_y, int width, int height, int va
     display->fillRect(start_x, start_y, start_x + bar_width, start_y + height);
 }
 
-void draw_bar_vertical(int start_x, int start_y, int width, int height, int value, int max_value, uint color, char fill_outline, UTFT *display)
+void bar_draw_vertical(int start_x, int start_y, int width, int height, int value, int max_value, uint color, char fill_outline, UTFT *display)
 {
     display->setColor(color);
     int bar_height = (int)((float)value / (float)max_value * height);
@@ -21,3 +21,41 @@ void draw_bar_vertical(int start_x, int start_y, int width, int height, int valu
     }
     display->fillRect(start_x, (start_y + height) - bar_height, start_x + width, start_y + height);
 }
+
+void bar_clear_part_horizontal(int start_x, int start_y, int width, int height, int value_from, int max_value, char clear_color, char clear_outline, UTFT *display)
+{
+    display->setColor(clear_color);
+    if (!clear_outline)
+    {
+        /**
+         * If we want to clear the outline, the part we need to clear becomes 1px smaller on each side.
+         * (that's not part of the bar to be filled, the "empty space" inside the bar)
+         * Because the start_y gets incremented, the end of the bar on the y side would be 2px too big. 
+         * That's why we need to decrement the height by 2.
+         */
+        start_y++;
+        height -= 2;
+        width--;
+    }
+    int bar_width = (int)((float)value_from / (float)max_value * width);
+    display->fillRect(start_x + bar_width, start_y, start_x + width, start_y + height);
+}
+
+void bar_clear_part_vertical(int start_x, int start_y, int width, int height, int value_from, int max_value, char clear_color, char clear_outline, UTFT *display)
+{
+    display->setColor(clear_color);
+    if (!clear_outline)
+    {
+        /**
+         * If we want to clear the outline, the part we need to clear becomes 1px smaller on each side.
+         * (that's not part of the bar to be filled, the "empty space" inside the bar)
+         * Because the start_x gets incremented, the end of the bar on the x side would be 2px too big. 
+         * That's why we need to decrement the width by 2.
+         */
+        start_x++;
+        start_y++;
+        width-= 2;
+    }
+    int bar_height = (int)((float)value_from / (float)max_value * height);
+    display->fillRect(start_x, start_y, start_x + width, start_y + bar_height);
+}

due_obd2/bars.h

@@ -15,7 +15,7 @@
  * @param     fill_outline Whether to fill the outline of the bar
  * @param    display      The display object
  */
-void draw_bar_horizontal(int start_x, int start_y, int width, int height, int value, int max_value, uint color, char fill_outline, UTFT *display);
+void bar_draw_horizontal(int start_x, int start_y, int width, int height, int value, int max_value, uint color, char fill_outline, UTFT *display);
 
 /**
  * @brief      Draws a vertical bar on the display
@@ -29,6 +29,34 @@ void draw_bar_horizontal(int start_x, int start_y, int width, int height, int va
  * @param     fill_outline Whether to fill the outline of the bar
  * @param    display      The display object
  */
-void draw_bar_vertical(int start_x, int start_y, int width, int height, int value, int max_value, uint color, char fill_outline, UTFT *display);
+void bar_draw_vertical(int start_x, int start_y, int width, int height, int value, int max_value, uint color, char fill_outline, UTFT *display);
+
+/**
+ * @brief      Clears a part of a horizontal bar
+ * @param     start_x      The start x position (top left)
+ * @param     start_y      The start y position (top left)
+ * @param     width        The width of the bar
+ * @param     height       The height of the bar
+ * @param     value_from   The value to start clearing from
+ * @param     max_value    The maximum value of the bar
+ * @param     clear_color  The color to clear the bar with
+ * @param     clear_outline Whether to clear the outline of the bar
+ * @param    display      The display object
+ */
+void bar_clear_part_horizontal(int start_x, int start_y, int width, int height, int value_from, int max_value, char clear_color, char clear_outline, UTFT *display);
+
+/**
+ * @brief      Clears a part of a vertical bar
+ * @param     start_x      The start x position (top left)
+ * @param     start_y      The start y position (top left)
+ * @param     width        The width of the bar
+ * @param     height       The height of the bar
+ * @param     value_from   The value to start clearing from
+ * @param     max_value    The maximum value of the bar
+ * @param     clear_color  The color to clear the bar with
+ * @param     clear_outline Whether to clear the outline of the bar
+ * @param    display      The display object
+ */
+void bar_clear_part_vertical(int start_x, int start_y, int width, int height, int value_from, int max_value, char clear_color, char clear_outline, UTFT *display);
 
 #endif

due_obd2/due_obd2.ino

@@ -115,7 +115,6 @@ state_t init_state =
         .on_run = &on_init_run,
         .on_exit = &on_init_exit};
 
-
 state_t main_state =
     {
         .id = STATE_CAR_INFO,
@@ -328,8 +327,9 @@ void on_main_run()
     {
         update_slow = 0;
         obd2_elm327_process_slow(&elm327);
-
+    }
-    } else {
+    else
+    {
         obd2_elm327_process_fast(&elm327);
     }
 
@@ -576,29 +576,31 @@ void setup()
 void loop()
 {
 
-    draw_bar_horizontal(0,0,200,10,bar_1_x,100,VGA_AQUA,1,&display);
+    bar_draw_horizontal(0, 0, 200, 10, bar_1_x, 100, VGA_AQUA, 1, &display);
 
-    draw_bar_horizontal(0,20,200,11,bar_2_x,100,VGA_FUCHSIA,1,&display);
+    bar_draw_horizontal(0, 20, 200, 11, bar_2_x, 100, VGA_FUCHSIA, 0, &display);
 
-    draw_bar_vertical(0,50,20,100,bar_3_y,100,VGA_BLUE,1,&display);
+    bar_draw_vertical(0, 50, 20, 100, bar_3_y, 100, VGA_BLUE, 1, &display);
 
     bar_1_x++;
     if (bar_1_x > 100)
     {
         bar_1_x = 0;
+        bar_clear_part_horizontal(0,0,200,10,bar_1_x,100,VGA_BLACK,0,&display);
     }
 
     bar_2_x++;
     if (bar_2_x > 100)
     {
         bar_2_x = 10;
+        bar_clear_part_horizontal(0,20,200,11,bar_2_x,100,VGA_BLACK,1,&display);
     }
     bar_3_y++;
     if (bar_3_y > 100)
     {
         bar_3_y = 50;
+        bar_clear_part_vertical(0,50,20,100,bar_3_y,100,VGA_BLACK,0,&display);
     }
-    display.clrScr();
     delay(50);
     // statemachine_loop();
 }