Add windowevent and buttonevent

src/sdl.zig

@@ -312,6 +312,52 @@ pub const MouseMotionEvent = struct {
     yrel: i32,
 };
 
+pub const WindowEventType = extern enum(u8) {
+    None = c.SDL_WINDOWEVENT_NONE,
+    Shown = c.SDL_WINDOWEVENT_SHOWN,
+    Hidden = c.SDL_WINDOWEVENT_HIDDEN,
+    Exposed = c.SDL_WINDOWEVENT_EXPOSED,
+    Moved = c.SDL_WINDOWEVENT_MOVED,
+    Resized = c.SDL_WINDOWEVENT_RESIZED,
+    SizeChanged = c.SDL_WINDOWEVENT_SIZE_CHANGED,
+    Minimized = c.SDL_WINDOWEVENT_MINIMIZED,
+    Maximized = c.SDL_WINDOWEVENT_MAXIMIZED,
+    Restored = c.SDL_WINDOWEVENT_RESTORED,
+    Enter = c.SDL_WINDOWEVENT_ENTER,
+    Leave = c.SDL_WINDOWEVENT_LEAVE,
+    FocusGained = c.SDL_WINDOWEVENT_FOCUS_GAINED,
+    FocusLost = c.SDL_WINDOWEVENT_FOCUS_LOST,
+    Close = c.SDL_WINDOWEVENT_CLOSE,
+    TakeFocus = c.SDL_WINDOWEVENT_TAKE_FOCUS,
+    HitTest = c.SDL_WINDOWEVENT_HIT_TEST,
+};
+
+pub const WindowEvent = struct {
+    timestamp: u32,
+    windowId: u32,
+    event: WindowEventType,
+
+    // TODO Might want to make this more specific
+    data1: i32,
+    data2: i32,
+};
+
+pub const MouseButtonState = extern enum(u8) {
+    Pressed = c.SDL_PRESSED,
+    Released = c.SDL_RELEASED,
+};
+
+pub const MouseButtonEvent = struct {
+    timestamp: u32,
+    windowId: u32,
+    which: u32,
+    button: u8,
+    state: MouseButtonState,
+    clicks: u8,
+    x: i32,
+    y: i32,
+};
+
 pub const Event = struct {
     event: c.SDL_Event,
 
@@ -344,6 +390,39 @@ pub const Event = struct {
             .yrel = inner.yrel,
         };
     }
+
+    pub fn window(self: Event) ?WindowEvent {
+        if (self.kind() != .WindowEvent) {
+            return null;
+        }
+
+        var inner = self.event.window;
+        return WindowEvent{
+            .timestamp = inner.timestamp,
+            .windowId = inner.windowID,
+            .event = @intToEnum(WindowEventType, inner.event),
+            .data1 = inner.data1,
+            .data2 = inner.data2,
+        };
+    }
+
+    pub fn button(self: Event) ?MouseButtonEvent {
+        if (self.kind() != .MouseButtonUp and self.kind() != .MouseButtonDown) {
+            return null;
+        }
+
+        var inner = self.event.button;
+        return MouseButtonEvent{
+            .timestamp = inner.timestamp,
+            .windowId = inner.windowID,
+            .which = inner.which,
+            .button = inner.button,
+            .state = @intToEnum(MouseButtonState, inner.state),
+            .clicks = inner.clicks,
+            .x = inner.x,
+            .y = inner.y,
+        };
+    }
 };
 
 pub const SystemCursor = extern enum {