Do not spawn when panning

life/src/main.rs

@@ -3,7 +3,9 @@
 use std::time::Duration;
 
 use bevy::{
-    audio::Volume, input::mouse::{AccumulatedMouseMotion, MouseMotion}, picking::hover::Hovered,
+    audio::Volume,
+    input::mouse::{AccumulatedMouseMotion, MouseMotion},
+    picking::hover::Hovered,
     platform::collections::HashMap,
 };
 use engine::*;
@@ -19,6 +21,7 @@ fn main() {
         }))
         .init_resource::<Coordinates>()
         .init_resource::<CellAssets>()
+        .init_resource::<Panning>()
         .init_state::<SimulationState>()
         .insert_resource(GlobalVolume::new(Volume::Linear(1.0)))
         .add_message::<Lifecycle>()
@@ -40,6 +43,7 @@ fn main() {
             Update,
             de_spawn_cells
                 .run_if(not(is_ui_hovered))
+                .run_if(not(is_panning))
                 .run_if(input_just_released(MouseButton::Left)),
         )
         .add_systems(
@@ -66,6 +70,7 @@ fn main() {
         )
         .add_systems(Update, cell_lifecycle.run_if(on_message::<Lifecycle>))
         .add_systems(Update, mouse_pan.run_if(on_message::<MouseMotion>))
+        .add_systems(Update, set_pan_state)
         .add_observer(on_add_ui_button)
         .add_observer(on_add_coordinates)
         .run();
@@ -685,3 +690,23 @@ fn mouse_pan(
         });
     }
 }
+
+#[derive(Resource, Default)]
+struct Panning(bool);
+
+fn set_pan_state(
+    mut panning: ResMut<Panning>,
+    mouse_motion: Res<AccumulatedMouseMotion>,
+    button: Res<ButtonInput<MouseButton>>,
+) {
+    // Set to panning if clicked and delta > 0
+    if button.pressed(MouseButton::Left) && mouse_motion.delta.abs().length() > 0.0 {
+        panning.0 = true
+    } else if button.just_released(MouseButton::Left) {
+        panning.0 = false;
+    }
+}
+
+fn is_panning(panning: Res<Panning>) -> bool {
+    panning.0
+}