Updated and simplified IconUtil API

src/main/java/envoy/client/ui/ClearableTextField.java

@@ -11,8 +11,6 @@ import javafx.scene.layout.Background;
 import javafx.scene.layout.ColumnConstraints;
 import javafx.scene.layout.GridPane;
 
-import envoy.client.data.Settings;
-
 /**
  * This class offers a text field that is automatically equipped with a clear
  * button.
@@ -49,10 +47,7 @@ public class ClearableTextField extends GridPane {
 	public ClearableTextField(String text, int size) {
 		// initializing the textField and the button
 		textField	= new TextField(text);
-		clearButton	= new Button("",
+		clearButton	= new Button("", new ImageView(IconUtil.loadDefaultThemeSensitive("clear_button_", size)));
-				new ImageView(IconUtil.load(
-						Settings.getInstance().getCurrentTheme().equals("dark") ? "/icons/clear_button_white.png" : "/icons/clear_button_black.png",
-						size)));
 		clearButton.setOnAction(e -> textField.clear());
 		clearButton.setFocusTraversable(false);
 		clearButton.getStyleClass().clear();

src/main/java/envoy/client/ui/IconUtil.java

@@ -2,9 +2,13 @@ package envoy.client.ui;
 
 import java.util.EnumMap;
 import java.util.EnumSet;
+import java.util.logging.Level;
 
 import javafx.scene.image.Image;
 
+import envoy.client.data.Settings;
+import envoy.util.EnvoyLog;
+
 /**
  * Provides static utility methods for loading icons from the resource
  * folder.
@@ -27,7 +31,16 @@ public class IconUtil {
 	 * @return the icon
 	 * @since Envoy Client v0.1-beta
 	 */
-	public static Image load(String path) { return new Image(IconUtil.class.getResource(path).toExternalForm()); }
+	public static Image load(String path) {
+		Image image;
+		try {
+			image = new Image(IconUtil.class.getResource(path).toExternalForm());
+		} catch (final NullPointerException e) {
+			EnvoyLog.getLogger(IconUtil.class).log(Level.WARNING, String.format("Could not load image at path %s: ", path), e);
+			throw e;
+		}
+		return image;
+	}
 
 	/**
 	 * Loads an icon from the resource folder and scales it to a given size.
@@ -38,9 +51,93 @@ public class IconUtil {
 	 * @since Envoy Client v0.1-beta
 	 */
 	public static Image load(String path, int size) {
-		return new Image(IconUtil.class.getResource(path).toExternalForm(), size, size, true, true);
+		Image image;
+		try {
+			image = new Image(IconUtil.class.getResource(path).toExternalForm(), size, size, true, true);
+		} catch (final NullPointerException e) {
+			EnvoyLog.getLogger(IconUtil.class).log(Level.WARNING, String.format("Could not load image at path %s: ", path), e);
+			throw e;
+		}
+		return image;
 	}
 
+	/**
+	 * Loads a {@code .png} icon from the sub-folder {@code /icons/} of the resource
+	 * folder and scales it to 16px.<br>
+	 * The suffix {@code .png} is automatically appended.
+	 *
+	 * @param name the image name without the .png - suffix
+	 * @return the loaded image
+	 * @since Envoy Client v0.1-beta
+	 * @apiNote let's take a sample image {@code abc.png} in the folder
+	 *          {@code /icons/}.
+	 *          <br>
+	 *          To do that, we only have to call
+	 *          {@code IconUtil.loadDefault("abc")}
+	 */
+	public static Image loadDefault(String name) { return load("/icons/" + name + ".png"); }
+
+	/**
+	 * Loads a {@code .png} icon from the sub-folder {@code /icons/} of the resource
+	 * folder and scales it to a given size.<br>
+	 * The suffix {@code .png} is automatically appended.
+	 *
+	 * @param name the image name without the .png - suffix
+	 * @param size the size of the image to scale to
+	 * @return the loaded image
+	 * @since Envoy Client v0.1-beta
+	 * @apiNote let's take a sample image {@code abc.png} in the folder
+	 *          {@code /icons/} and load it in size 16.
+	 *          <br>
+	 *          To do that, we only have to call
+	 *          {@code IconUtil.loadDefault("abc", 16)}
+	 */
+	public static Image loadDefault(String name, int size) { return load("/icons/" + name + ".png", size); }
+
+	/**
+	 * Loads a {@code .png} icon whose design depends on the currently active theme
+	 * from the sub-folder {@code /icons/} of the resource folder.
+	 * <p>
+	 * In case of the dark theme, the suffix {@code "white"} will be appended, else
+	 * the suffix {@code "black"} will be appended.
+	 * <p>
+	 * The suffix {@code .png} is automatically appended.
+	 *
+	 * @param name the image name without the "black" or "white" suffix and without
+	 *             the .png - suffix
+	 * @return the loaded image
+	 * @since Envoy Client v0.1-beta
+	 * @apiNote let's take two sample images {@code abc_black.png} and
+	 *          {@code abc_white.png} in the folder {@code /icons/} and load them.
+	 *          <br>
+	 *          To do that theme sensitve, we only have to call
+	 *          {@code IconUtil.loadDefaultThemeSensitive("abc_")}
+	 */
+	public static Image loadDefaultThemeSensitive(String name) { return loadDefault(name + themeSpecificSuffix()); }
+
+	/**
+	 * Loads a {@code .png} icon whose design depends on the currently active theme
+	 * from the sub-folder {@code /icons/} of the resource
+	 * folder and scales it to the given size.
+	 * <p>
+	 * In case of the dark theme, the suffix {@code "white"} will be appended, else
+	 * the suffix {@code "black"} will be appended.
+	 * <p>
+	 * The suffix {@code .png} is automatically appended.
+	 *
+	 * @param name the image name without the .png - suffix
+	 * @param size the size of the image to scale to
+	 * @return the loaded image
+	 * @since Envoy Client v0.1-beta
+	 * @apiNote let's take two sample images {@code abc_black.png} and
+	 *          {@code abc_white.png} in the folder {@code /icons/} and load it in
+	 *          size 16.
+	 *          <br>
+	 *          To do that theme sensitve, we only have to call
+	 *          {@code IconUtil.loadDefaultThemeSensitive("abc_", 16)}
+	 */
+	public static Image loadDefaultThemeSensitive(String name, int size) { return loadDefault(name + themeSpecificSuffix(), size); }
+
 	/**
 	 *
 	 * Loads icons specified by an enum. The images have to be named like the
@@ -62,4 +159,15 @@ public class IconUtil {
 			icons.put(e, load(path + e.toString().toLowerCase() + ".png", size));
 		return icons;
 	}
+
+	/**
+	 * This method should be called if the display of an icon depends upon the
+	 * currently active theme.<br>
+	 * In case of the dark theme, the suffix {@code "white"} will be appended, else
+	 * the suffix {@code "black"} will be appended.
+	 *
+	 * @return the theme specific suffix
+	 * @since Envoy Client v0.1-beta
+	 */
+	public static String themeSpecificSuffix() { return Settings.getInstance().getCurrentTheme().equals("dark") ? "white" : "black"; }
 }

src/main/java/envoy/client/ui/Startup.java

@@ -102,7 +102,7 @@ public final class Startup extends Application {
 		messageStatusCache	= new Cache<>();
 
 		stage.setTitle("Envoy");
-		stage.getIcons().add(IconUtil.load("/icons/envoy_logo.png"));
+		stage.getIcons().add(IconUtil.loadDefault("envoy_logo"));
 
 		final var sceneContext = new SceneContext(stage);
 		sceneContext.load(SceneInfo.LOGIN_SCENE);

src/main/java/envoy/client/ui/controller/ChatScene.java

@@ -110,7 +110,7 @@ public final class ChatScene implements Restorable {
 		messageList.setCellFactory(MessageListCellFactory::new);
 		userList.setCellFactory(ContactListCellFactory::new);
 
-		settingsButton.setGraphic(new ImageView(IconUtil.load("/icons/settings.png", 16)));
+		settingsButton.setGraphic(new ImageView(IconUtil.loadDefault("settings", 16)));
 
 		// Listen to received messages
 		eventBus.register(MessageCreationEvent.class, e -> {
@@ -222,9 +222,9 @@ public final class ChatScene implements Restorable {
 			if (recorder.isRecording()) {
 				recorder.cancel();
 				recording = false;
-				voiceButton.setText("Record Voice Message");
 			}
 			pendingAttachment = null;
+			attachmentView.setVisible(false);
 
 			remainingChars.setVisible(true);
 			remainingChars
@@ -270,8 +270,7 @@ public final class ChatScene implements Restorable {
 					Platform.runLater(() -> {
 						voiceButton.setText("Record Voice Message");
 						checkPostConditions(false);
-						attachmentView.setImage(IconUtil.load(settings.getCurrentTheme().equals("dark") ? "/icons/attachment_present_white.png"
+						attachmentView.setImage(IconUtil.loadDefaultThemeSensitive("attachment_present_", 20));
-								: "/icons/attachment_present_black.png", 20));
 						attachmentView.setVisible(true);
 					});
 				}
@@ -311,7 +310,7 @@ public final class ChatScene implements Restorable {
 	private void checkPostConditions(boolean sendKeyPressed) {
 		if (!postingPermanentlyDisabled) {
 			if (!postButton.isDisabled() && sendKeyPressed) postMessage();
-			postButton.setDisable((messageTextArea.getText().isBlank() && pendingAttachment == null) || currentChat == null);
+			postButton.setDisable(messageTextArea.getText().isBlank() && pendingAttachment == null || currentChat == null);
 		} else {
 			final var noMoreMessaging = "Go online to send messages";
 			if (!infoLabel.getText().equals(noMoreMessaging))
@@ -373,6 +372,7 @@ public final class ChatScene implements Restorable {
 			if (pendingAttachment != null) {
 				builder.setAttachment(pendingAttachment);
 				pendingAttachment = null;
+				attachmentView.setVisible(false);
 			}
 			final var message = builder.build();
 

src/main/resources/fxml/ChatScene.fxml

@@ -117,7 +117,7 @@
 			</GridPane.margin>
 			<buttons>
 				<Button fx:id="voiceButton" disable="true"
-					onAction="#voiceButtonClicked" text="_Record Voice Message">
+					onAction="#voiceButtonClicked">
 					<padding>
 						<Insets bottom="5.0" left="5.0" right="5.0" top="5.0" />
 					</padding>