When STATUS_EXPIRE_SECONDS is 0, hide the position. (#10081)

Some users may prefer to hide the position updates on the `LIGHTWEIGHT_UI` altogether. This leads to an even less cluttered display (it also saves on SPI traffic and one byte of RAM).

Marlin/Configuration_adv.h

@@ -665,6 +665,9 @@
      * Since LIGHTWEIGHT_UI has limited space, the position and status
      * message occupy the same line. Set STATUS_EXPIRE_SECONDS to the
      * length of time to display the status message before clearing.
+     *
+     * Set STATUS_EXPIRE_SECONDS to zero to never clear the status.
+     * This will prevent position updates from being displayed.
      */
     //#define LIGHTWEIGHT_UI
     #if ENABLED(LIGHTWEIGHT_UI)

Marlin/src/config/default/Configuration_adv.h

@@ -665,6 +665,9 @@
      * Since LIGHTWEIGHT_UI has limited space, the position and status
      * message occupy the same line. Set STATUS_EXPIRE_SECONDS to the
      * length of time to display the status message before clearing.
+     *
+     * Set STATUS_EXPIRE_SECONDS to zero to never clear the status.
+     * This will prevent position updates from being displayed.
      */
     //#define LIGHTWEIGHT_UI
     #if ENABLED(LIGHTWEIGHT_UI)

Marlin/src/config/examples/AlephObjects/TAZ4/Configuration_adv.h

@@ -665,6 +665,9 @@
      * Since LIGHTWEIGHT_UI has limited space, the position and status
      * message occupy the same line. Set STATUS_EXPIRE_SECONDS to the
      * length of time to display the status message before clearing.
+     *
+     * Set STATUS_EXPIRE_SECONDS to zero to never clear the status.
+     * This will prevent position updates from being displayed.
      */
     //#define LIGHTWEIGHT_UI
     #if ENABLED(LIGHTWEIGHT_UI)

Marlin/src/config/examples/Anet/A6/Configuration_adv.h

@@ -665,6 +665,9 @@
      * Since LIGHTWEIGHT_UI has limited space, the position and status
      * message occupy the same line. Set STATUS_EXPIRE_SECONDS to the
      * length of time to display the status message before clearing.
+     *
+     * Set STATUS_EXPIRE_SECONDS to zero to never clear the status.
+     * This will prevent position updates from being displayed.
      */
     //#define LIGHTWEIGHT_UI
     #if ENABLED(LIGHTWEIGHT_UI)

Marlin/src/config/examples/Anet/A8/Configuration_adv.h

@@ -665,6 +665,9 @@
      * Since LIGHTWEIGHT_UI has limited space, the position and status
      * message occupy the same line. Set STATUS_EXPIRE_SECONDS to the
      * length of time to display the status message before clearing.
+     *
+     * Set STATUS_EXPIRE_SECONDS to zero to never clear the status.
+     * This will prevent position updates from being displayed.
      */
     //#define LIGHTWEIGHT_UI
     #if ENABLED(LIGHTWEIGHT_UI)

Marlin/src/config/examples/Azteeg/X5GT/Configuration_adv.h

@@ -665,6 +665,9 @@
      * Since LIGHTWEIGHT_UI has limited space, the position and status
      * message occupy the same line. Set STATUS_EXPIRE_SECONDS to the
      * length of time to display the status message before clearing.
+     *
+     * Set STATUS_EXPIRE_SECONDS to zero to never clear the status.
+     * This will prevent position updates from being displayed.
      */
     //#define LIGHTWEIGHT_UI
     #if ENABLED(LIGHTWEIGHT_UI)

Marlin/src/config/examples/BIBO/TouchX/Configuration_adv.h

@@ -665,6 +665,9 @@
      * Since LIGHTWEIGHT_UI has limited space, the position and status
      * message occupy the same line. Set STATUS_EXPIRE_SECONDS to the
      * length of time to display the status message before clearing.
+     *
+     * Set STATUS_EXPIRE_SECONDS to zero to never clear the status.
+     * This will prevent position updates from being displayed.
      */
     //#define LIGHTWEIGHT_UI
     #if ENABLED(LIGHTWEIGHT_UI)

Marlin/src/config/examples/BQ/Hephestos/Configuration_adv.h

@@ -665,6 +665,9 @@
      * Since LIGHTWEIGHT_UI has limited space, the position and status
      * message occupy the same line. Set STATUS_EXPIRE_SECONDS to the
      * length of time to display the status message before clearing.
+     *
+     * Set STATUS_EXPIRE_SECONDS to zero to never clear the status.
+     * This will prevent position updates from being displayed.
      */
     //#define LIGHTWEIGHT_UI
     #if ENABLED(LIGHTWEIGHT_UI)

Marlin/src/config/examples/BQ/Hephestos_2/Configuration_adv.h

@@ -665,6 +665,9 @@
      * Since LIGHTWEIGHT_UI has limited space, the position and status
      * message occupy the same line. Set STATUS_EXPIRE_SECONDS to the
      * length of time to display the status message before clearing.
+     *
+     * Set STATUS_EXPIRE_SECONDS to zero to never clear the status.
+     * This will prevent position updates from being displayed.
      */
     //#define LIGHTWEIGHT_UI
     #if ENABLED(LIGHTWEIGHT_UI)

Marlin/src/config/examples/BQ/WITBOX/Configuration_adv.h

@@ -665,6 +665,9 @@
      * Since LIGHTWEIGHT_UI has limited space, the position and status
      * message occupy the same line. Set STATUS_EXPIRE_SECONDS to the
      * length of time to display the status message before clearing.
+     *
+     * Set STATUS_EXPIRE_SECONDS to zero to never clear the status.
+     * This will prevent position updates from being displayed.
      */
     //#define LIGHTWEIGHT_UI
     #if ENABLED(LIGHTWEIGHT_UI)

Marlin/src/config/examples/Cartesio/Configuration_adv.h

@@ -665,6 +665,9 @@
      * Since LIGHTWEIGHT_UI has limited space, the position and status
      * message occupy the same line. Set STATUS_EXPIRE_SECONDS to the
      * length of time to display the status message before clearing.
+     *
+     * Set STATUS_EXPIRE_SECONDS to zero to never clear the status.
+     * This will prevent position updates from being displayed.
      */
     //#define LIGHTWEIGHT_UI
     #if ENABLED(LIGHTWEIGHT_UI)

Marlin/src/config/examples/Creality/CR-10/Configuration_adv.h

@@ -665,6 +665,9 @@
      * Since LIGHTWEIGHT_UI has limited space, the position and status
      * message occupy the same line. Set STATUS_EXPIRE_SECONDS to the
      * length of time to display the status message before clearing.
+     *
+     * Set STATUS_EXPIRE_SECONDS to zero to never clear the status.
+     * This will prevent position updates from being displayed.
      */
     //#define LIGHTWEIGHT_UI
     #if ENABLED(LIGHTWEIGHT_UI)

Marlin/src/config/examples/Creality/CR-10S/Configuration_adv.h

@@ -665,6 +665,9 @@
      * Since LIGHTWEIGHT_UI has limited space, the position and status
      * message occupy the same line. Set STATUS_EXPIRE_SECONDS to the
      * length of time to display the status message before clearing.
+     *
+     * Set STATUS_EXPIRE_SECONDS to zero to never clear the status.
+     * This will prevent position updates from being displayed.
      */
     //#define LIGHTWEIGHT_UI
     #if ENABLED(LIGHTWEIGHT_UI)

Marlin/src/config/examples/Creality/CR-10mini/Configuration_adv.h

@@ -665,6 +665,9 @@
      * Since LIGHTWEIGHT_UI has limited space, the position and status
      * message occupy the same line. Set STATUS_EXPIRE_SECONDS to the
      * length of time to display the status message before clearing.
+     *
+     * Set STATUS_EXPIRE_SECONDS to zero to never clear the status.
+     * This will prevent position updates from being displayed.
      */
     //#define LIGHTWEIGHT_UI
     #if ENABLED(LIGHTWEIGHT_UI)

Marlin/src/config/examples/Creality/Ender-2/Configuration_adv.h

@@ -665,6 +665,9 @@
      * Since LIGHTWEIGHT_UI has limited space, the position and status
      * message occupy the same line. Set STATUS_EXPIRE_SECONDS to the
      * length of time to display the status message before clearing.
+     *
+     * Set STATUS_EXPIRE_SECONDS to zero to never clear the status.
+     * This will prevent position updates from being displayed.
      */
     //#define LIGHTWEIGHT_UI
     #if ENABLED(LIGHTWEIGHT_UI)

Marlin/src/config/examples/Creality/Ender-4/Configuration_adv.h

@@ -665,6 +665,9 @@
      * Since LIGHTWEIGHT_UI has limited space, the position and status
      * message occupy the same line. Set STATUS_EXPIRE_SECONDS to the
      * length of time to display the status message before clearing.
+     *
+     * Set STATUS_EXPIRE_SECONDS to zero to never clear the status.
+     * This will prevent position updates from being displayed.
      */
     //#define LIGHTWEIGHT_UI
     #if ENABLED(LIGHTWEIGHT_UI)

Marlin/src/config/examples/Felix/Configuration_adv.h

@@ -665,6 +665,9 @@
      * Since LIGHTWEIGHT_UI has limited space, the position and status
      * message occupy the same line. Set STATUS_EXPIRE_SECONDS to the
      * length of time to display the status message before clearing.
+     *
+     * Set STATUS_EXPIRE_SECONDS to zero to never clear the status.
+     * This will prevent position updates from being displayed.
      */
     //#define LIGHTWEIGHT_UI
     #if ENABLED(LIGHTWEIGHT_UI)

Marlin/src/config/examples/FolgerTech/i3-2020/Configuration_adv.h

@@ -665,6 +665,9 @@
      * Since LIGHTWEIGHT_UI has limited space, the position and status
      * message occupy the same line. Set STATUS_EXPIRE_SECONDS to the
      * length of time to display the status message before clearing.
+     *
+     * Set STATUS_EXPIRE_SECONDS to zero to never clear the status.
+     * This will prevent position updates from being displayed.
      */
     //#define LIGHTWEIGHT_UI
     #if ENABLED(LIGHTWEIGHT_UI)

Marlin/src/config/examples/Infitary/i3-M508/Configuration_adv.h

@@ -665,6 +665,9 @@
      * Since LIGHTWEIGHT_UI has limited space, the position and status
      * message occupy the same line. Set STATUS_EXPIRE_SECONDS to the
      * length of time to display the status message before clearing.
+     *
+     * Set STATUS_EXPIRE_SECONDS to zero to never clear the status.
+     * This will prevent position updates from being displayed.
      */
     //#define LIGHTWEIGHT_UI
     #if ENABLED(LIGHTWEIGHT_UI)

Marlin/src/config/examples/JGAurora/A5/Configuration_adv.h

@@ -665,6 +665,9 @@
      * Since LIGHTWEIGHT_UI has limited space, the position and status
      * message occupy the same line. Set STATUS_EXPIRE_SECONDS to the
      * length of time to display the status message before clearing.
+     *
+     * Set STATUS_EXPIRE_SECONDS to zero to never clear the status.
+     * This will prevent position updates from being displayed.
      */
     //#define LIGHTWEIGHT_UI
     #if ENABLED(LIGHTWEIGHT_UI)

Marlin/src/config/examples/MakerParts/Configuration_adv.h

@@ -665,6 +665,9 @@
      * Since LIGHTWEIGHT_UI has limited space, the position and status
      * message occupy the same line. Set STATUS_EXPIRE_SECONDS to the
      * length of time to display the status message before clearing.
+     *
+     * Set STATUS_EXPIRE_SECONDS to zero to never clear the status.
+     * This will prevent position updates from being displayed.
      */
     //#define LIGHTWEIGHT_UI
     #if ENABLED(LIGHTWEIGHT_UI)

Marlin/src/config/examples/Malyan/M150/Configuration_adv.h

@@ -665,6 +665,9 @@
      * Since LIGHTWEIGHT_UI has limited space, the position and status
      * message occupy the same line. Set STATUS_EXPIRE_SECONDS to the
      * length of time to display the status message before clearing.
+     *
+     * Set STATUS_EXPIRE_SECONDS to zero to never clear the status.
+     * This will prevent position updates from being displayed.
      */
     //#define LIGHTWEIGHT_UI
     #if ENABLED(LIGHTWEIGHT_UI)

Marlin/src/config/examples/Malyan/M200/Configuration_adv.h

@@ -665,6 +665,9 @@
      * Since LIGHTWEIGHT_UI has limited space, the position and status
      * message occupy the same line. Set STATUS_EXPIRE_SECONDS to the
      * length of time to display the status message before clearing.
+     *
+     * Set STATUS_EXPIRE_SECONDS to zero to never clear the status.
+     * This will prevent position updates from being displayed.
      */
     //#define LIGHTWEIGHT_UI
     #if ENABLED(LIGHTWEIGHT_UI)

Marlin/src/config/examples/Micromake/C1/enhanced/Configuration_adv.h

@@ -665,6 +665,9 @@
      * Since LIGHTWEIGHT_UI has limited space, the position and status
      * message occupy the same line. Set STATUS_EXPIRE_SECONDS to the
      * length of time to display the status message before clearing.
+     *
+     * Set STATUS_EXPIRE_SECONDS to zero to never clear the status.
+     * This will prevent position updates from being displayed.
      */
     //#define LIGHTWEIGHT_UI
     #if ENABLED(LIGHTWEIGHT_UI)

Marlin/src/config/examples/Mks/Sbase/Configuration_adv.h

@@ -673,6 +673,9 @@
      * Since LIGHTWEIGHT_UI has limited space, the position and status
      * message occupy the same line. Set STATUS_EXPIRE_SECONDS to the
      * length of time to display the status message before clearing.
+     *
+     * Set STATUS_EXPIRE_SECONDS to zero to never clear the status.
+     * This will prevent position updates from being displayed.
      */
     //#define LIGHTWEIGHT_UI
     #if ENABLED(LIGHTWEIGHT_UI)

Marlin/src/config/examples/RigidBot/Configuration_adv.h

@@ -665,6 +665,9 @@
      * Since LIGHTWEIGHT_UI has limited space, the position and status
      * message occupy the same line. Set STATUS_EXPIRE_SECONDS to the
      * length of time to display the status message before clearing.
+     *
+     * Set STATUS_EXPIRE_SECONDS to zero to never clear the status.
+     * This will prevent position updates from being displayed.
      */
     //#define LIGHTWEIGHT_UI
     #if ENABLED(LIGHTWEIGHT_UI)

Marlin/src/config/examples/SCARA/Configuration_adv.h

@@ -665,6 +665,9 @@
      * Since LIGHTWEIGHT_UI has limited space, the position and status
      * message occupy the same line. Set STATUS_EXPIRE_SECONDS to the
      * length of time to display the status message before clearing.
+     *
+     * Set STATUS_EXPIRE_SECONDS to zero to never clear the status.
+     * This will prevent position updates from being displayed.
      */
     //#define LIGHTWEIGHT_UI
     #if ENABLED(LIGHTWEIGHT_UI)

Marlin/src/config/examples/Sanguinololu/Configuration_adv.h

@@ -665,6 +665,9 @@
      * Since LIGHTWEIGHT_UI has limited space, the position and status
      * message occupy the same line. Set STATUS_EXPIRE_SECONDS to the
      * length of time to display the status message before clearing.
+     *
+     * Set STATUS_EXPIRE_SECONDS to zero to never clear the status.
+     * This will prevent position updates from being displayed.
      */
     //#define LIGHTWEIGHT_UI
     #if ENABLED(LIGHTWEIGHT_UI)

Marlin/src/config/examples/TheBorg/Configuration_adv.h

@@ -665,6 +665,9 @@
      * Since LIGHTWEIGHT_UI has limited space, the position and status
      * message occupy the same line. Set STATUS_EXPIRE_SECONDS to the
      * length of time to display the status message before clearing.
+     *
+     * Set STATUS_EXPIRE_SECONDS to zero to never clear the status.
+     * This will prevent position updates from being displayed.
      */
     //#define LIGHTWEIGHT_UI
     #if ENABLED(LIGHTWEIGHT_UI)

Marlin/src/config/examples/TinyBoy2/Configuration_adv.h

@@ -665,6 +665,9 @@
      * Since LIGHTWEIGHT_UI has limited space, the position and status
      * message occupy the same line. Set STATUS_EXPIRE_SECONDS to the
      * length of time to display the status message before clearing.
+     *
+     * Set STATUS_EXPIRE_SECONDS to zero to never clear the status.
+     * This will prevent position updates from being displayed.
      */
     //#define LIGHTWEIGHT_UI
     #if ENABLED(LIGHTWEIGHT_UI)

Marlin/src/config/examples/UltiMachine/Archim2/Configuration_adv.h

@@ -665,6 +665,9 @@
      * Since LIGHTWEIGHT_UI has limited space, the position and status
      * message occupy the same line. Set STATUS_EXPIRE_SECONDS to the
      * length of time to display the status message before clearing.
+     *
+     * Set STATUS_EXPIRE_SECONDS to zero to never clear the status.
+     * This will prevent position updates from being displayed.
      */
     //#define LIGHTWEIGHT_UI
     #if ENABLED(LIGHTWEIGHT_UI)

Marlin/src/config/examples/Velleman/K8200/Configuration_adv.h

@@ -678,6 +678,9 @@
      * Since LIGHTWEIGHT_UI has limited space, the position and status
      * message occupy the same line. Set STATUS_EXPIRE_SECONDS to the
      * length of time to display the status message before clearing.
+     *
+     * Set STATUS_EXPIRE_SECONDS to zero to never clear the status.
+     * This will prevent position updates from being displayed.
      */
     //#define LIGHTWEIGHT_UI
     #if ENABLED(LIGHTWEIGHT_UI)

Marlin/src/config/examples/Velleman/K8400/Configuration_adv.h

@@ -665,6 +665,9 @@
      * Since LIGHTWEIGHT_UI has limited space, the position and status
      * message occupy the same line. Set STATUS_EXPIRE_SECONDS to the
      * length of time to display the status message before clearing.
+     *
+     * Set STATUS_EXPIRE_SECONDS to zero to never clear the status.
+     * This will prevent position updates from being displayed.
      */
     //#define LIGHTWEIGHT_UI
     #if ENABLED(LIGHTWEIGHT_UI)

Marlin/src/config/examples/Wanhao/Duplicator 6/Configuration_adv.h

@@ -667,6 +667,9 @@
      * Since LIGHTWEIGHT_UI has limited space, the position and status
      * message occupy the same line. Set STATUS_EXPIRE_SECONDS to the
      * length of time to display the status message before clearing.
+     *
+     * Set STATUS_EXPIRE_SECONDS to zero to never clear the status.
+     * This will prevent position updates from being displayed.
      */
     //#define LIGHTWEIGHT_UI
     #if ENABLED(LIGHTWEIGHT_UI)

Marlin/src/config/examples/delta/FLSUN/auto_calibrate/Configuration_adv.h

@@ -667,6 +667,9 @@
      * Since LIGHTWEIGHT_UI has limited space, the position and status
      * message occupy the same line. Set STATUS_EXPIRE_SECONDS to the
      * length of time to display the status message before clearing.
+     *
+     * Set STATUS_EXPIRE_SECONDS to zero to never clear the status.
+     * This will prevent position updates from being displayed.
      */
     //#define LIGHTWEIGHT_UI
     #if ENABLED(LIGHTWEIGHT_UI)

Marlin/src/config/examples/delta/FLSUN/kossel/Configuration_adv.h

@@ -667,6 +667,9 @@
      * Since LIGHTWEIGHT_UI has limited space, the position and status
      * message occupy the same line. Set STATUS_EXPIRE_SECONDS to the
      * length of time to display the status message before clearing.
+     *
+     * Set STATUS_EXPIRE_SECONDS to zero to never clear the status.
+     * This will prevent position updates from being displayed.
      */
     //#define LIGHTWEIGHT_UI
     #if ENABLED(LIGHTWEIGHT_UI)

Marlin/src/config/examples/delta/FLSUN/kossel_mini/Configuration_adv.h

@@ -667,6 +667,9 @@
      * Since LIGHTWEIGHT_UI has limited space, the position and status
      * message occupy the same line. Set STATUS_EXPIRE_SECONDS to the
      * length of time to display the status message before clearing.
+     *
+     * Set STATUS_EXPIRE_SECONDS to zero to never clear the status.
+     * This will prevent position updates from being displayed.
      */
     //#define LIGHTWEIGHT_UI
     #if ENABLED(LIGHTWEIGHT_UI)

Marlin/src/config/examples/delta/generic/Configuration_adv.h

@@ -667,6 +667,9 @@
      * Since LIGHTWEIGHT_UI has limited space, the position and status
      * message occupy the same line. Set STATUS_EXPIRE_SECONDS to the
      * length of time to display the status message before clearing.
+     *
+     * Set STATUS_EXPIRE_SECONDS to zero to never clear the status.
+     * This will prevent position updates from being displayed.
      */
     //#define LIGHTWEIGHT_UI
     #if ENABLED(LIGHTWEIGHT_UI)

Marlin/src/config/examples/delta/kossel_mini/Configuration_adv.h

@@ -667,6 +667,9 @@
      * Since LIGHTWEIGHT_UI has limited space, the position and status
      * message occupy the same line. Set STATUS_EXPIRE_SECONDS to the
      * length of time to display the status message before clearing.
+     *
+     * Set STATUS_EXPIRE_SECONDS to zero to never clear the status.
+     * This will prevent position updates from being displayed.
      */
     //#define LIGHTWEIGHT_UI
     #if ENABLED(LIGHTWEIGHT_UI)

Marlin/src/config/examples/delta/kossel_pro/Configuration_adv.h

@@ -672,6 +672,9 @@
      * Since LIGHTWEIGHT_UI has limited space, the position and status
      * message occupy the same line. Set STATUS_EXPIRE_SECONDS to the
      * length of time to display the status message before clearing.
+     *
+     * Set STATUS_EXPIRE_SECONDS to zero to never clear the status.
+     * This will prevent position updates from being displayed.
      */
     //#define LIGHTWEIGHT_UI
     #if ENABLED(LIGHTWEIGHT_UI)

Marlin/src/config/examples/delta/kossel_xl/Configuration_adv.h

@@ -667,6 +667,9 @@
      * Since LIGHTWEIGHT_UI has limited space, the position and status
      * message occupy the same line. Set STATUS_EXPIRE_SECONDS to the
      * length of time to display the status message before clearing.
+     *
+     * Set STATUS_EXPIRE_SECONDS to zero to never clear the status.
+     * This will prevent position updates from being displayed.
      */
     //#define LIGHTWEIGHT_UI
     #if ENABLED(LIGHTWEIGHT_UI)

Marlin/src/config/examples/gCreate/gMax1.5+/Configuration_adv.h

@@ -665,6 +665,9 @@
      * Since LIGHTWEIGHT_UI has limited space, the position and status
      * message occupy the same line. Set STATUS_EXPIRE_SECONDS to the
      * length of time to display the status message before clearing.
+     *
+     * Set STATUS_EXPIRE_SECONDS to zero to never clear the status.
+     * This will prevent position updates from being displayed.
      */
     //#define LIGHTWEIGHT_UI
     #if ENABLED(LIGHTWEIGHT_UI)

Marlin/src/config/examples/makibox/Configuration_adv.h

@@ -665,6 +665,9 @@
      * Since LIGHTWEIGHT_UI has limited space, the position and status
      * message occupy the same line. Set STATUS_EXPIRE_SECONDS to the
      * length of time to display the status message before clearing.
+     *
+     * Set STATUS_EXPIRE_SECONDS to zero to never clear the status.
+     * This will prevent position updates from being displayed.
      */
     //#define LIGHTWEIGHT_UI
     #if ENABLED(LIGHTWEIGHT_UI)

Marlin/src/config/examples/tvrrug/Round2/Configuration_adv.h

@@ -665,6 +665,9 @@
      * Since LIGHTWEIGHT_UI has limited space, the position and status
      * message occupy the same line. Set STATUS_EXPIRE_SECONDS to the
      * length of time to display the status message before clearing.
+     *
+     * Set STATUS_EXPIRE_SECONDS to zero to never clear the status.
+     * This will prevent position updates from being displayed.
      */
     //#define LIGHTWEIGHT_UI
     #if ENABLED(LIGHTWEIGHT_UI)

Marlin/src/config/examples/wt150/Configuration_adv.h

@@ -666,6 +666,9 @@
      * Since LIGHTWEIGHT_UI has limited space, the position and status
      * message occupy the same line. Set STATUS_EXPIRE_SECONDS to the
      * length of time to display the status message before clearing.
+     *
+     * Set STATUS_EXPIRE_SECONDS to zero to never clear the status.
+     * This will prevent position updates from being displayed.
      */
     //#define LIGHTWEIGHT_UI
     #if ENABLED(LIGHTWEIGHT_UI)

Marlin/src/lcd/dogm/status_screen_lite_ST7920.h

@@ -622,7 +622,7 @@ void ST7920_Lite_Status_Screen::draw_status_message(const char *str) {
 
     // Trim whitespace at the end of the str, as for some reason
     // messages like "Card Inserted" are padded with many spaces
-    while (str_len > 0 && str[str_len - 1] == ' ') str_len--;
+    while (str_len && str[str_len - 1] == ' ') str_len--;
 
     if (str_len <= lcd_len) {
       // It all fits on the LCD without scrolling
@@ -765,8 +765,15 @@ bool ST7920_Lite_Status_Screen::blink_changed() {
   return true;
 }
 
+#ifndef STATUS_EXPIRE_SECONDS
+  #define STATUS_EXPIRE_SECONDS 20
+#endif
+
 void ST7920_Lite_Status_Screen::update_status_or_position(bool forceUpdate) {
-  static uint8_t countdown = 0;
+
+  #if STATUS_EXPIRE_SECONDS
+    static uint8_t countdown = 0;
+  #endif
 
   /**
    * There is only enough room in the display for either the
@@ -779,51 +786,60 @@ void ST7920_Lite_Status_Screen::update_status_or_position(bool forceUpdate) {
    *    countdown > 1    -- Show status
    *    countdown = 1    -- Show status, until movement
    *    countdown = 0    -- Show position
+   *
+   * If STATUS_EXPIRE_SECONDS is zero, the position display
+   * will be disabled and only the status will be shown.
    */
   if (forceUpdate || status_changed()) {
     #if ENABLED(STATUS_MESSAGE_SCROLLING)
       status_scroll_pos = 0;
     #endif
-    #ifndef STATUS_EXPIRE_SECONDS
-      #define STATUS_EXPIRE_SECONDS 20
+    #if STATUS_EXPIRE_SECONDS
+      countdown = lcd_status_message[0] ? STATUS_EXPIRE_SECONDS : 0;
     #endif
-    countdown = lcd_strlen(lcd_status_message) ? STATUS_EXPIRE_SECONDS : 0;
     draw_status_message(lcd_status_message);
     blink_changed(); // Clear changed flag
   }
-  else if (countdown > 1 && blink_changed()) {
-    countdown--;
+  #if !STATUS_EXPIRE_SECONDS
     #if ENABLED(STATUS_MESSAGE_SCROLLING)
-      draw_status_message(lcd_status_message);
+      else
+        draw_status_message(lcd_status_message);
     #endif
-  }
-  else if (countdown > 0 && blink_changed()) {
-    if (position_changed()) {
+  #else
+    else if (countdown > 1 && blink_changed()) {
       countdown--;
-      forceUpdate = true;
+      #if ENABLED(STATUS_MESSAGE_SCROLLING)
+        draw_status_message(lcd_status_message);
+      #endif
     }
-    #if ENABLED(STATUS_MESSAGE_SCROLLING)
-      draw_status_message(lcd_status_message);
-    #endif
-  }
-  if (countdown == 0 && (forceUpdate || position_changed() ||
-    #if DISABLED(DISABLE_REDUCED_ACCURACY_WARNING)
-      blink_changed()
-    #endif
-  )) {
-    draw_position(
-      current_position[X_AXIS],
-      current_position[Y_AXIS],
-      current_position[Z_AXIS],
-      #if ENABLED(DISABLE_REDUCED_ACCURACY_WARNING)
-        true
-      #else
-        axis_known_position[X_AXIS] &&
-        axis_known_position[Y_AXIS] &&
-        axis_known_position[Z_AXIS]
+    else if (countdown > 0 && blink_changed()) {
+      if (position_changed()) {
+        countdown--;
+        forceUpdate = true;
+      }
+      #if ENABLED(STATUS_MESSAGE_SCROLLING)
+        draw_status_message(lcd_status_message);
       #endif
-    );
-  }
+    }
+    if (countdown == 0 && (forceUpdate || position_changed() ||
+      #if DISABLED(DISABLE_REDUCED_ACCURACY_WARNING)
+        blink_changed()
+      #endif
+    )) {
+      draw_position(
+        current_position[X_AXIS],
+        current_position[Y_AXIS],
+        current_position[Z_AXIS],
+        #if ENABLED(DISABLE_REDUCED_ACCURACY_WARNING)
+          true
+        #else
+          axis_known_position[X_AXIS] &&
+          axis_known_position[Y_AXIS] &&
+          axis_known_position[Z_AXIS]
+        #endif
+      );
+    }
+  #endif
 }
 
 void ST7920_Lite_Status_Screen::update_progress(const bool forceUpdate) {