Focus: Add a "clear" sub-command

Signed-off-by: Gergely Nagy <algernon@madhouse-project.org>

src/Kaleidoscope/FingerPainter.cpp

@@ -104,6 +104,7 @@ namespace KaleidoscopePlugins {
     enum {
       PALETTE,
       TOGGLE,
+      CLEAR,
     } subCommand;
 
     if (strncmp_P (command, PSTR ("fingerpainter."), 14) != 0)
@@ -113,6 +114,8 @@ namespace KaleidoscopePlugins {
       subCommand = PALETTE;
     else if (strcmp_P (command + 14, PSTR ("toggle")) == 0)
       subCommand = TOGGLE;
+    else if (strcmp_P (command + 14, PSTR ("clear")) == 0)
+      subCommand = CLEAR;
     else
       return false;
 
@@ -122,6 +125,13 @@ namespace KaleidoscopePlugins {
       return true;
     }
 
+    if (subCommand == CLEAR) {
+      for (uint16_t i = 0; i < ROWS * COLS; i++) {
+        EEPROM.update (colorBase + i, 0);
+      }
+      return true;
+    }
+
     if (Serial.peek () == '\n') {
       for (uint8_t i = 0; i < 16; i++) {
         cRGB color;

src/Kaleidoscope/FingerPainter.h

@@ -49,7 +49,8 @@ extern KaleidoscopePlugins::FingerPainter FingerPainter;
 
 #define FOCUS_HOOK_FINGERPAINTER FOCUS_HOOK(FingerPainter.focusHook,  \
                                             "fingerpainter.palette\n" \
-                                            "fingerpainter.toggle")
+                                            "fingerpainter.toggle\n"  \
+                                            "fingerpainter.clear")
 
 #define FINGERPAINTER_PALETTE_EGA (const cRGB[]) { \
       CRGB (0x00, 0x00, 0x00),                     \