From 1e666da666081bece2c244c2297d08801add3103 Mon Sep 17 00:00:00 2001
From: Bad Diode <bd@badd10de.dev>
Date: Sat, 15 Jul 2023 22:16:00 +0200
Subject: Add cursors and fully functioning chain workflow

---
 src/drawing.c   | 21 +++++++++++++++++++
 src/globals.c   |  1 +
 src/main.c      |  4 ++--
 src/sequencer.c | 62 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 86 insertions(+), 2 deletions(-)

(limited to 'src')

diff --git a/src/drawing.c b/src/drawing.c
index 8cd63db..b7d5421 100644
--- a/src/drawing.c
+++ b/src/drawing.c
@@ -1151,6 +1151,24 @@ clear_cursors(void) {
     }
 }
 
+void
+draw_pattern_chain_cursor(void) {
+    size_t offset_x = (PAT_TRIG_H + 7) * (param_selection_loc % 8);
+    size_t offset_y = param_selection_loc < 8 ? 0 : 0 + PAT_TRIG_OFFSET_Y;
+    size_t x0 = PAT_TRIG_START_X + offset_x;
+    size_t x1 = PAT_TRIG_START_X + offset_x + PAT_TRIG_W;
+    size_t y  = PAT_TRIG_START_Y + offset_y + PAT_TRIG_H + 2;
+    switch (settings.cursor) {
+        case CURSOR_THICK_LINE: {
+            draw_line(x0, y, x1, y, COL_ACC_0);
+            draw_line(x0, y + 1, x1, y + 1, COL_ACC_0);
+        } break;
+        default: {
+            draw_line(x0, y, x1, y, COL_ACC_0);
+        } break;
+    }
+}
+
 void
 draw_cursors(void) {
     clear_cursors();
@@ -1184,6 +1202,9 @@ draw_cursors(void) {
             input_handler == handle_param_selection_ch4) {
         draw_params_cursor(param_selection_loc, COL_ACC_0);
     }
+    if (input_handler == handle_pattern_chain) {
+        draw_pattern_chain_cursor();
+    }
 }
 
 TriggerNote * get_current_trig(void);
diff --git a/src/globals.c b/src/globals.c
index 1efa90c..1e0d964 100644
--- a/src/globals.c
+++ b/src/globals.c
@@ -119,6 +119,7 @@ void handle_param_selection_ch1(void);
 void handle_param_selection_ch2(void);
 void handle_param_selection_ch3(void);
 void handle_param_selection_ch4(void);
+void handle_pattern_chain(void);
 
 typedef enum Scene {
     SCENE_SEQUENCER = 0,
diff --git a/src/main.c b/src/main.c
index 2f073c7..2cda769 100644
--- a/src/main.c
+++ b/src/main.c
@@ -94,8 +94,8 @@ render_sequencer(void) {
         redraw_params = false;
     }
 
-    if (input_handler == handle_pattern_selection){
-        // TODO: redraw_params in pattern_selection context?
+    if (input_handler == handle_pattern_selection ||
+            input_handler == handle_pattern_chain){
         draw_pattern_chain();
     }
 
diff --git a/src/sequencer.c b/src/sequencer.c
index eeb7816..9de08f8 100644
--- a/src/sequencer.c
+++ b/src/sequencer.c
@@ -316,6 +316,7 @@ handle_channel_selection(void) {
         redraw_params = true;
     } else if (key_tap(KEY_LEFT)) {
         input_handler = handle_pattern_selection;
+        param_selection_loc = 0;
         redraw_params = true;
     } else if (key_tap(KEY_UP)) {
         if (channel_selection_loc == 0) {
@@ -459,6 +460,7 @@ handle_right_col_selection(void) {
             right_col_selection_loc = R_COL_STOP;
         } else {
             input_handler = handle_pattern_selection;
+            param_selection_loc = 0;
             redraw_trigs = true;
         }
     } else if (key_tap(KEY_UP)) {
@@ -528,6 +530,64 @@ handle_right_col_selection(void) {
     }
 }
 
+void
+handle_pattern_chain(void) {
+    if (key_tap(KEY_A)) {
+        input_handler = handle_pattern_selection;
+    } else if (key_tap(KEY_LEFT)) {
+        if (param_selection_loc == 8) {
+            param_selection_loc = 15;
+        } else if (param_selection_loc > 0) {
+            param_selection_loc--;
+        } else if (param_selection_loc == 0) {
+            param_selection_loc = 7;
+        }
+    } else if (key_tap(KEY_RIGHT)) {
+        if (param_selection_loc < 15 && param_selection_loc != 7) {
+            param_selection_loc++;
+        } else if (param_selection_loc == 7) {
+            param_selection_loc = 0;
+        } else if (param_selection_loc == 15) {
+            param_selection_loc = 8;
+        }
+    } else if (key_tap(KEY_UP)) {
+        if (param_selection_loc <= 7) {
+            param_selection_loc += 8;
+        } else {
+            param_selection_loc -= 8;
+        }
+    } else if (key_tap(KEY_DOWN)) {
+        if (param_selection_loc <= 7) {
+            param_selection_loc += 8;
+        } else {
+            param_selection_loc -= 8;
+        }
+    } else if (key_tap(KEY_B)) {
+        if (chain.active[param_selection_loc]) {
+            // Can't toggle current chain.
+            if (!play_status || param_selection_loc != chain.current) {
+                chain.active[param_selection_loc] = 0;
+                chain.len--;
+            }
+        } else {
+            chain.active[param_selection_loc] = 1;
+            chain.len++;
+        }
+    } else if (key_tap(KEY_L)) {
+        if (chain.active[param_selection_loc] 
+                && chain.chain[param_selection_loc] > 0
+                && (!play_status || param_selection_loc != chain.current)) {
+            chain.chain[param_selection_loc]--;
+        }
+    } else if (key_tap(KEY_R)) {
+        if (chain.active[param_selection_loc] 
+                && chain.chain[param_selection_loc] < 7
+                && (!play_status || param_selection_loc != chain.current)) {
+            chain.chain[param_selection_loc]++;
+        }
+    }
+}
+
 void
 handle_pattern_selection(void) {
     if (key_tap(KEY_B)) {
@@ -541,6 +601,8 @@ handle_pattern_selection(void) {
     if (key_tap(KEY_A)) {
         if (key_hold(KEY_SELECT)) {
             clipboard_paste();
+        } else {
+            input_handler = handle_pattern_chain;
         }
     }
     if (key_tap(KEY_RIGHT)) {
-- 
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