ui pipeline

ui/events.sx

@@ -0,0 +1,106 @@
+#import "modules/std.sx";
+#import "modules/sdl3.sx";
+#import "ui/types.sx";
+
+EventType :: enum {
+    none;
+    mouse_down;
+    mouse_up;
+    mouse_moved;
+    mouse_wheel;
+    key_down;
+    key_up;
+    text_input;
+    window_resize;
+    quit;
+}
+
+MouseButton :: enum {
+    none;
+    left;
+    middle;
+    right;
+}
+
+Event :: struct {
+    type: EventType;
+    position: Point;
+    delta: Point;
+    button: MouseButton;
+    key: u32;
+    text: string;
+    timestamp: u64;
+
+    make :: (type: EventType) -> Event {
+        e : Event = ---;
+        memset(@e, 0, size_of(Event));
+        e.type = type;
+        e;
+    }
+}
+
+// Translate SDL_Event → our Event type
+translate_sdl_event :: (sdl: *SDL_Event) -> Event {
+    if sdl.* == {
+        case .quit: {
+            return Event.make(.quit);
+        }
+        case .key_down: (data) {
+            e := Event.make(.key_down);
+            e.key = xx data.key;
+            e.timestamp = data.timestamp;
+            return e;
+        }
+        case .key_up: (data) {
+            e := Event.make(.key_up);
+            e.key = xx data.key;
+            e.timestamp = data.timestamp;
+            return e;
+        }
+        case .mouse_motion: (data) {
+            e := Event.make(.mouse_moved);
+            e.position = Point.{ x = data.x, y = data.y };
+            e.delta = Point.{ x = data.xrel, y = data.yrel };
+            e.timestamp = data.timestamp;
+            return e;
+        }
+        case .mouse_button_down: (data) {
+            e := Event.make(.mouse_down);
+            e.position = Point.{ x = data.x, y = data.y };
+            e.button = if data.button == {
+                case 1: .left;
+                case 2: .middle;
+                case 3: .right;
+                else: .none;
+            };
+            e.timestamp = data.timestamp;
+            return e;
+        }
+        case .mouse_button_up: (data) {
+            e := Event.make(.mouse_up);
+            e.position = Point.{ x = data.x, y = data.y };
+            e.button = if data.button == {
+                case 1: .left;
+                case 2: .middle;
+                case 3: .right;
+                else: .none;
+            };
+            e.timestamp = data.timestamp;
+            return e;
+        }
+        case .mouse_wheel: (data) {
+            e := Event.make(.mouse_wheel);
+            e.delta = Point.{ x = data.x, y = data.y };
+            e.position = Point.{ x = data.mouse_x, y = data.mouse_y };
+            e.timestamp = data.timestamp;
+            return e;
+        }
+        case .window_resized: (data) {
+            e := Event.make(.window_resize);
+            e.position = Point.{ x = xx data.data1, y = xx data.data2 };
+            e.timestamp = data.timestamp;
+            return e;
+        }
+    }
+    Event.make(.none);
+}