Fix regression that broke pause during recording or overdubbing

loopers-common/src/gui_channel.rs

@@ -13,6 +13,7 @@ pub const WAVEFORM_DOWNSAMPLE: usize = 2048;
 #[derive(Copy, Clone, Eq, PartialEq, Debug)]
 pub enum EngineState {
     Stopped,
+    Paused,
     Active,
 }
 

loopers-engine/src/lib.rs

@@ -506,15 +506,15 @@ impl Engine {
                 self.state = EngineState::Active;
             }
             Pause => {
-                self.state = EngineState::Stopped;
+                self.state = EngineState::Paused;
             }
             Stop => {
                 self.state = EngineState::Stopped;
                 self.reset();
             }
             StartStop => {
                 self.state = match self.state {
-                    EngineState::Stopped => EngineState::Active,
+                    EngineState::Stopped | EngineState::Paused => EngineState::Active,
                     EngineState::Active => {
                         self.reset();
                         EngineState::Stopped
@@ -523,8 +523,8 @@ impl Engine {
             }
             PlayPause => {
                 self.state = match self.state {
-                    EngineState::Stopped => EngineState::Active,
-                    EngineState::Active => EngineState::Stopped,
+                    EngineState::Stopped | EngineState::Paused => EngineState::Active,
+                    EngineState::Active => EngineState::Paused,
                 }
             }
             Reset => {
@@ -994,7 +994,7 @@ impl Engine {
             self.output_right[i] = *r as f64;
         }
 
-        if self.state != EngineState::Active && (!self.triggers.is_empty() ||
+        if (self.state != EngineState::Active && self.state != EngineState::Paused) && (!self.triggers.is_empty() ||
             self.loopers.iter().any(|l| l.local_mode() == LooperMode::Recording ||
                 l.local_mode() == LooperMode::Overdubbing)) {
             self.state = EngineState::Active;

loopers-gui/src/app.rs

@@ -1235,7 +1235,13 @@ impl PlayPauseButton {
             };
         }
 
-        if data.engine_state.engine_state == EngineState::Stopped {
+        if data.engine_state.engine_state == EngineState::Active {
+            // draw pause button
+            let rect1 = Rect::new(0.0, 0.0, 7.5, 20.0);
+            let rect2 = Rect::new(12.5, 0.0, 20.0, 20.0);
+            canvas.draw_rect(&rect1, &paint);
+            canvas.draw_rect(&rect2, &paint);
+        } else {
             // draw play icon
             let mut path = Path::new();
             path.move_to((0.0, 0.0));
@@ -1244,12 +1250,6 @@ impl PlayPauseButton {
             path.line_to((0.0, 0.0));
             path.close();
             canvas.draw_path(&path, &paint);
-        } else {
-            // draw pause button
-            let rect1 = Rect::new(0.0, 0.0, 7.5, 20.0);
-            let rect2 = Rect::new(12.5, 0.0, 20.0, 20.0);
-            canvas.draw_rect(&rect1, &paint);
-            canvas.draw_rect(&rect2, &paint);
         }
 
         Size::new(25.0, 25.0)