Add pattern clearing with SEL+L+R on pattern view

1 files changed, 64 insertions, 16 deletions

diff --git a/src/sequencer.c b/src/sequencer.c
index 4e3802f..3110c74 100644
--- a/src/sequencer.c
+++ b/src/sequencer.c
@@ -20,6 +20,22 @@ bool update_bpm = false;
 u8 bar_counter = 0;
 
 void
+clear_pattern(size_t idx) {
+    Pattern *pat = &patterns[idx];
+    *pat = (Pattern){default_ch1, default_ch2, default_ch3, default_ch4, default_bpm, 0, false};
+    for (size_t i = 0; i < 16; i++) {
+        pat->ch1.notes[i] = (TriggerNote){false, NOTE_C_4};
+        pat->ch2.notes[i] = (TriggerNote){false, NOTE_C_4};
+        pat->ch3.notes[i] = (TriggerNote){false, NOTE_C_4};
+        pat->ch4.notes[i] = (TriggerNote){false, NOTE_C_4};
+    }
+    redraw_pattern_buttons = true;
+    redraw_channels = true;
+    redraw_trigs = true;
+    redraw_bpm = true;
+}
+
+void
 gate_off(void) {
     SIO_MODE = SIO_MODE_GP
         | SIO_SC_OUT(1)
@@ -117,7 +133,7 @@ play_step(void) {
         }
         chain.playing = true;
     }
-    if (pat->ch1.active) {
+    if (pat->ch1.active && !pat->empty) {
         TriggerNote *trig = &pat->ch1.notes[step_counter];
         ChannelSquareParams *params = &pat->ch1.params[step_counter];
         if (trig->active && should_play(params->prob)) {
@@ -162,7 +178,7 @@ play_step(void) {
         SOUND_SQUARE1_FREQ = SOUND_FREQ_RESET;
         SOUND_SQUARE1_CTRL = 0;
     }
-    if (pat->ch2.active) {
+    if (pat->ch2.active && !pat->empty) {
         TriggerNote *trig = &pat->ch2.notes[step_counter];
         ChannelSquareParams *params = &pat->ch2.params[step_counter];
         if (trig->active && should_play(params->prob)) {
@@ -188,7 +204,7 @@ play_step(void) {
         SOUND_SQUARE2_FREQ = SOUND_FREQ_RESET;
         SOUND_SQUARE2_CTRL = 0;
     }
-    if (pat->ch3.active) {
+    if (pat->ch3.active && !pat->empty) {
         TriggerNote *trig = &pat->ch3.notes[step_counter];
         ChannelWaveParams *params = &pat->ch3.params[step_counter];
         if (trig->active && should_play(params->prob)) {
@@ -237,7 +253,7 @@ play_step(void) {
         SOUND_WAVE_FREQ = SOUND_FREQ_RESET;
         SOUND_WAVE_CTRL = SOUND_WAVE_MUTE;
     }
-    if (pat->ch4.active) {
+    if (pat->ch4.active && !pat->empty) {
         TriggerNote *trig = &pat->ch4.notes[step_counter];
         ChannelNoiseParams *params = &pat->ch4.params[step_counter];
         if (trig->active && should_play(params->prob)) {
@@ -347,6 +363,9 @@ handle_channel_selection(void) {
         if (key_hold(KEY_SELECT)) {
             clipboard_copy();
         } else {
+            if (patterns[pattern_selection_loc].empty) {
+                clear_pattern(pattern_selection_loc);
+            }
             switch (channel_selection_loc) {
                 case 0: { pat->ch1.active ^= 1; } break;
                 case 1: { pat->ch2.active ^= 1; } break;
@@ -358,6 +377,10 @@ handle_channel_selection(void) {
     } else if (key_tap(KEY_A)) {
         if (key_hold(KEY_SELECT)) {
             clipboard_paste();
+            redraw_bpm = true;
+            redraw_trigs = true;
+            redraw_channels = true;
+            redraw_pattern_buttons = true;
         } else {
             switch (channel_selection_loc) {
                 case 0: { input_handler = handle_param_selection_ch1; } break;
@@ -645,6 +668,9 @@ handle_right_col_selection(void) {
                     set_time(patterns[current_pattern].bpm);
                 }
                 redraw_bpm = true;
+                if (patterns[pattern_selection_loc].empty) {
+                    clear_pattern(pattern_selection_loc);
+                }
             } break;
             // TODO: Scale.
         }
@@ -664,6 +690,9 @@ handle_right_col_selection(void) {
                     set_time(patterns[current_pattern].bpm);
                 }
                 redraw_bpm = true;
+                if (patterns[pattern_selection_loc].empty) {
+                    clear_pattern(pattern_selection_loc);
+                }
             } break;
             // TODO: Scale.
         }
@@ -748,20 +777,32 @@ handle_pattern_chain(void) {
 
 void
 handle_pattern_selection(void) {
-    if (key_tap(KEY_B)) {
-        if (key_hold(KEY_SELECT)) {
+    if (key_hold(KEY_SELECT)) {
+        if ((key_pressed(KEY_L) && key_tap(KEY_R))
+                || (key_pressed(KEY_R) && key_tap(KEY_L))) {
+            patterns[pattern_selection_loc].empty ^= 1;
+            redraw_pattern_buttons = true;
+            redraw_channels = true;
+            redraw_trigs = true;
+        }
+        if (key_tap(KEY_B)) {
             clipboard_copy();
-        } else {
-            next_pattern = pattern_selection_loc;
+        }
+        if (key_tap(KEY_A)) {
+            clipboard_paste();
+            redraw_bpm = true;
+            redraw_trigs = true;
+            redraw_channels = true;
             redraw_pattern_buttons = true;
         }
+        return;
+    }
+    if (key_tap(KEY_B)) {
+        next_pattern = pattern_selection_loc;
+        redraw_pattern_buttons = true;
     }
     if (key_tap(KEY_A)) {
-        if (key_hold(KEY_SELECT)) {
-            clipboard_paste();
-        } else {
-            input_handler = handle_pattern_chain;
-        }
+        input_handler = handle_pattern_chain;
     }
     if (key_tap(KEY_RIGHT)) {
         input_handler = handle_channel_selection;
@@ -1214,11 +1255,14 @@ void
 handle_trigger_selection(void) {
     TriggerNote *trig = get_current_trig();
 
+    bool empty = patterns[pattern_selection_loc].empty;
     if (key_tap(KEY_B)) {
         if (key_hold(KEY_SELECT)) {
             clipboard_copy();
         } else {
-            // Toggle trigger.
+            if (empty) {
+                clear_pattern(pattern_selection_loc);
+            }
             trig->active ^= 1;
             redraw_trigs = true;
         }
@@ -1228,7 +1272,7 @@ handle_trigger_selection(void) {
             inc = -12;
         }
         // Decrease note.
-        if (trig->active) {
+        if (trig->active && !empty) {
             trig->note = MAX((s32)trig->note + inc, (s32)NOTE_C_2);
         }
         redraw_trigs = true;
@@ -1239,7 +1283,7 @@ handle_trigger_selection(void) {
             inc = 12;
         }
         // Increase note.
-        if (trig->active) {
+        if (trig->active && !empty) {
             trig->note = MIN((s32)trig->note + inc, (s32)NOTE_C_8 - 1);
         }
         redraw_trigs = true;
@@ -1275,6 +1319,10 @@ handle_trigger_selection(void) {
     } else if (key_tap(KEY_A)) {
         if (key_hold(KEY_SELECT)) {
             clipboard_paste();
+            redraw_bpm = true;
+            redraw_trigs = true;
+            redraw_channels = true;
+            redraw_pattern_buttons = true;
         } else {
             // Switch to parameter selection.
             switch (channel_selection_loc) {