Non-fullscreen view

- ViewComponent can take view and drive it as non-fullscreen
- ViewDoneEvent which InputView now uses
- ComponentUiCommands is a sample where we add ideas for
  views in flow components
- Allow View to set eventloop
- Relates #850

spring-shell-samples/spring-shell-sample-commands/src/main/java/org/springframework/shell/samples/standard/ComponentUiCommands.java

@@ -0,0 +1,36 @@
+/*
+ * Copyright 2023 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.shell.samples.standard;
+
+import org.springframework.shell.command.annotation.Command;
+import org.springframework.shell.component.ViewComponent;
+import org.springframework.shell.component.view.control.InputView;
+import org.springframework.shell.standard.AbstractShellComponent;
+
+@Command
+public class ComponentUiCommands extends AbstractShellComponent {
+
+	@Command(command = "componentui string")
+	public String stringInput() {
+		InputView view = new InputView();
+		view.setRect(0, 0, 10, 1);
+		ViewComponent component = new ViewComponent(getTerminal(), view);
+		component.run();
+		String input = view.getInputText();
+		return String.format("Input was '%s'", input);
+	}
+
+}