[v3 windows] Support Close and take into account HideOnClose option

v3/STATUS.md

@@ -29,7 +29,7 @@ Webview Window Interface Methods
 | Method                                             | Windows | Linux | Mac | Notes                                    |
 |----------------------------------------------------|---------|-------|-----|------------------------------------------|
 | center()                                           | Y       |       | Y   |                                          |
-| close()                                            |         |       | Y   |                                          |
+| close()                                            | Y       |       | Y   |                                          |
 | destroy()                                          |         |       | Y   |                                          |
 | execJS(js string)                                  | Y       |       | Y   |                                          |
 | focus()                                            | Y       |       | Y   |                                          |

v3/pkg/application/webview_window.go

@@ -590,6 +590,10 @@ func (w *WebviewWindow) Close() {
 	if w.impl == nil {
 		return
 	}
+	if w.options.HideOnClose {
+		invokeSync(func() { w.Hide() })
+		return
+	}
 	invokeSync(w.impl.close)
 }
 

v3/pkg/application/webview_window_windows.go

@@ -351,8 +351,7 @@ func (w *windowsWebviewWindow) setZoom(zoom float64) {
 }
 
 func (w *windowsWebviewWindow) close() {
-	//TODO implement me
-	panic("implement me")
+	w32.SendMessage(w.hwnd, w32.WM_CLOSE, 0, 0)
 }
 
 func (w *windowsWebviewWindow) zoom() {