From e5d61a87ec41443a2e32cd8be1ecc62b8c590251 Mon Sep 17 00:00:00 2001
From: Bad Diode <bd@badd10de.dev>
Date: Tue, 22 Aug 2023 12:28:10 +0200
Subject: Add pattern clearing with SEL+L+R on pattern view

---
 src/drawing.c | 40 +++++++++++++++++++++++++++++++---------
 1 file changed, 31 insertions(+), 9 deletions(-)

(limited to 'src/drawing.c')

diff --git a/src/drawing.c b/src/drawing.c
index d24307b..253a961 100644
--- a/src/drawing.c
+++ b/src/drawing.c
@@ -3,7 +3,7 @@
 //
 
 void
-draw_param_stub(size_t idx, u8 color) {
+draw_param_stub(size_t idx, u8 clr) {
     if (idx >= 10) {
         return;
     }
@@ -15,12 +15,12 @@ draw_param_stub(size_t idx, u8 color) {
     }
     u8 y1 = y0 + PARAMS_BOX_H;
     for (size_t i = 0; i < PARAMS_BOX_W; i += 2) {
-        draw_pixel(x0 + i + 1, y0, color);
-        draw_pixel(x0 + i + 1, y1, color);
+        draw_pixel(x0 + i + 1, y0, clr);
+        draw_pixel(x0 + i + 1, y1, clr);
     }
     for (size_t i = 0; i < PARAMS_BOX_H; i += 2) {
-        draw_pixel(x0, y0 + i + 1, color);
-        draw_pixel(x1, y0 + i + 1, color);
+        draw_pixel(x0, y0 + i + 1, clr);
+        draw_pixel(x1, y0 + i + 1, clr);
     }
 }
 
@@ -79,6 +79,9 @@ draw_channels(void) {
             case 2: { active = patterns[pattern_selection_loc].ch3.active; } break;
             case 3: { active = patterns[pattern_selection_loc].ch4.active; } break;
         }
+        if (patterns[pattern_selection_loc].empty) {
+            active = true;
+        }
         u8 clr = active ? colors[i] : COL_OFF;
         size_t y = CHAN_START_Y + i * CHAN_OFFSET_Y;
         draw_channel_sprite(CHAN_START_X, y, clr, i);
@@ -273,14 +276,26 @@ draw_bank_buttons() {
     }
 }
 
+void
+draw_dotted_rect(size_t x0, size_t y0, size_t x1, size_t y1, u8 clr) {
+    size_t w = x1 - x0;
+    size_t h = y1 - y0;
+    for (size_t i = 0; i <= w; i += 2) {
+        draw_pixel(x0 + i, y0, clr);
+        draw_pixel(x0 + i, y1, clr);
+    }
+    for (size_t i = 0; i <= h; i += 2) {
+        draw_pixel(x0, y0 + i, clr);
+        draw_pixel(x1, y0 + i, clr);
+    }
+}
+
 void
 draw_pattern_buttons() {
     // Clear patterns.
     size_t x = PAT_START_X;
     size_t y = PAT_START_Y;
 
-    draw_filled_rect(x, y, x + PAT_W, y + PAT_H * 8, COL_BG);
-
     txt_drawf_small("PAT", x, y - 10, COL_FG);
     char pat_names[] = {
         'A', 'B', 'C', 'D',
@@ -294,7 +309,12 @@ draw_pattern_buttons() {
         if (i == next_pattern && current_pattern != next_pattern) {
             color = COL_ACC_0;
         }
-        draw_rect(x, y, x + PAT_W, y + PAT_H, color);
+        draw_filled_rect(x, y, x + PAT_W, y + PAT_H, COL_BG);
+        if (patterns[i].empty) {
+            draw_dotted_rect(x, y, x + PAT_W, y + PAT_H, color);
+        } else {
+            draw_rect(x, y, x + PAT_W, y + PAT_H, color);
+        }
         txt_drawc(pat_names[i], x + 4, y + 1, color);
         y += PAT_OFFSET_Y;
     }
@@ -404,7 +424,9 @@ draw_triggers(void) {
         size_t y1 = TRIG_START_Y + offset_y + TRIG_H;
         draw_rect(x0, y0, x1, y1, COL_FG);
         clear_trigger(i);
-        draw_trigger(channel_selection_loc, i);
+        if (!patterns[pattern_selection_loc].empty) {
+            draw_trigger(channel_selection_loc, i);
+        }
     }
 }
 
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