feat(demo): add demo for adding and removing custom controls

src/test/java/com/flowingcode/vaadin/addons/googlemaps/CustomControlsDemo.java

@@ -0,0 +1,103 @@
+/*-
+ * #%L
+ * Google Maps Addon
+ * %%
+ * Copyright (C) 2020 - 2024 Flowing Code
+ * %%
+ * 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
+ * 
+ *      http://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.
+ * #L%
+ */
+
+package com.flowingcode.vaadin.addons.googlemaps;
+
+import com.flowingcode.vaadin.addons.demo.DemoSource;
+import com.flowingcode.vaadin.addons.googlemaps.GoogleMap.MapType;
+import com.vaadin.flow.component.button.Button;
+import com.vaadin.flow.component.dependency.CssImport;
+import com.vaadin.flow.component.orderedlayout.HorizontalLayout;
+import com.vaadin.flow.router.PageTitle;
+import com.vaadin.flow.router.Route;
+
+@PageTitle("Custom Controls Demo")
+@DemoSource
+@DemoSource(
+    value = "/src/test/resources/META-INF/resources/frontend/styles/google-maps/custom-controls-demo-styles.css",
+    caption = "custom-controls-demo-styles.css")
+@Route(value = "googlemaps/custom-controls", layout = GooglemapsDemoView.class)
+@CssImport("./styles/google-maps/custom-controls-demo-styles.css")
+@SuppressWarnings("serial")
+public class CustomControlsDemo extends AbstractGoogleMapsDemo {
+
+  @Override
+  protected void createGoogleMapsDemo(String apiKey) {
+    GoogleMap gmaps = new GoogleMap(apiKey, null, null);
+    gmaps.setMapType(MapType.ROADMAP);
+    gmaps.setSizeFull();
+    add(gmaps);
+
+    Button customControlButton1 = new Button("Custom Control 1");
+    customControlButton1.setClassName("custom-control-button");
+    CustomControl customControl1 =
+        new CustomControl(customControlButton1, ControlPosition.TOP_CENTER);
+    Button customControlButton2 = new Button("Custom Control 2");
+    customControlButton2.setClassName("custom-control-button");
+    CustomControl customControl2 =
+        new CustomControl(customControlButton2, ControlPosition.LEFT_CENTER);
+    gmaps.setCustomControls(customControl1, customControl2);
+
+    Button customControlButton3 = new Button("Custom Control 3");
+    customControlButton3.setClassName("custom-control-button");
+    CustomControl customControl3 =
+        new CustomControl(customControlButton3, ControlPosition.BOTTOM_CENTER);
+
+    Button addCustomControl3Button = createDemoButton("Add Custom Control 3");
+    Button removeCustomControl3Button = createDemoButton("Remove Custom Control 3");
+    Button removeAllCustomControlsButton = createDemoButton("Remove all controls");
+    Button resetButton = createDemoButton("Reset");
+
+    addCustomControl3Button.addClickListener(e -> {
+      gmaps.addCustomControl(customControl3);
+      removeCustomControl3Button.setEnabled(true); // hide-source
+      removeAllCustomControlsButton.setEnabled(true); // hide-source
+    });  
+
+    removeCustomControl3Button.addClickListener(e -> {
+      gmaps.removeCustomControl(customControl3);
+      addCustomControl3Button.setEnabled(true); // hide-source
+    });
+    removeCustomControl3Button.setEnabled(false); 
+
+    removeAllCustomControlsButton.addClickListener(e -> {
+      gmaps.removeCustomControls();
+      addCustomControl3Button.setEnabled(true); // hide-source
+      removeCustomControl3Button.setEnabled(false); // hide-source
+      resetButton.setEnabled(true); // hide-source
+    });
+
+    resetButton.addClickListener(e -> {
+      gmaps.setCustomControls(customControl1, customControl2);
+      removeAllCustomControlsButton.setEnabled(true); // hide-source
+      addCustomControl3Button.setEnabled(true); // hide-source
+      removeCustomControl3Button.setEnabled(false); // hide-source
+    });
+
+    add(new HorizontalLayout(addCustomControl3Button, removeCustomControl3Button,
+        removeAllCustomControlsButton, resetButton));
+  }
+
+  private Button createDemoButton(String caption) {
+    Button button = new Button(caption);
+    button.setDisableOnClick(true);
+    return button;
+  }
+}

src/test/java/com/flowingcode/vaadin/addons/googlemaps/GooglemapsDemoView.java

@@ -48,6 +48,7 @@ public GooglemapsDemoView() {
     addDemo(CustomizedMarkerIconsDemo.class);
     addDemo(TrackLocationDemo.class);
     addDemo(StyleFeaturesDemo.class);
+    addDemo(CustomControlsDemo.class);
     setSizeFull();
   }
 }

src/test/resources/META-INF/resources/frontend/styles/google-maps/custom-controls-demo-styles.css

@@ -0,0 +1,31 @@
+/*-
+ * #%L
+ * Google Maps Addon
+ * %%
+ * Copyright (C) 2020 - 2024 Flowing Code
+ * %%
+ * 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
+ * 
+ *      http://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.
+ * #L%
+ */
+
+.custom-control-button {
+	background: white;
+	margin: 10px;
+	height: 40px;
+	color: black;
+	cursor: pointer;
+	font-family: Arial;
+	font-size: 18px;
+	border-radius: 0;
+	box-shadow: rgba(0, 0, 0, 0.3) 0px 1px 4px -1px;
+}