Merge pull request #183 from informatik-ag-ngl/f/pictures

Add attachment creation support, display picture messages

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

@@ -2,7 +2,10 @@ package envoy.client.ui.controller;
 
 import java.awt.Toolkit;
 import java.awt.datatransfer.StringSelection;
+import java.io.ByteArrayInputStream;
+import java.io.File;
 import java.io.IOException;
+import java.nio.file.Files;
 import java.util.logging.Level;
 import java.util.logging.Logger;
 import java.util.stream.Collectors;
@@ -12,10 +15,12 @@ import javafx.collections.FXCollections;
 import javafx.fxml.FXML;
 import javafx.scene.control.*;
 import javafx.scene.control.Alert.AlertType;
+import javafx.scene.image.Image;
 import javafx.scene.image.ImageView;
 import javafx.scene.input.KeyCode;
 import javafx.scene.input.KeyEvent;
 import javafx.scene.paint.Color;
+import javafx.stage.FileChooser;
 
 import envoy.client.data.*;
 import envoy.client.data.audio.AudioRecorder;
@@ -60,6 +65,9 @@ public final class ChatScene implements Restorable {
 	@FXML
 	private Button voiceButton;
 
+	@FXML
+	private Button attachmentButton;
+
 	@FXML
 	private Button settingsButton;
 
@@ -87,12 +95,15 @@ public final class ChatScene implements Restorable {
 	private AudioRecorder	recorder;
 	private boolean			recording;
 	private Attachment		pendingAttachment;
-	private boolean			postingPermanentlyDisabled	= false;
+	private boolean			postingPermanentlyDisabled;
 
-	private static final Settings	settings			= Settings.getInstance();
-	private static final EventBus	eventBus			= EventBus.getInstance();
-	private static final Logger		logger				= EnvoyLog.getLogger(ChatScene.class);
-	private static final int		MAX_MESSAGE_LENGTH	= 255;
+	private static final Settings	settings	= Settings.getInstance();
+	private static final EventBus	eventBus	= EventBus.getInstance();
+	private static final Logger		logger		= EnvoyLog.getLogger(ChatScene.class);
+
+	private static final Image	DEFAULT_ATTACHMENT_VIEW_IMAGE	= IconUtil.loadIconThemeSensitive("attachment_present", 20);
+	private static final int	MAX_MESSAGE_LENGTH				= 255;
+	private static final int	DEFAULT_ICON_SIZE				= 16;
 
 	/**
 	 * Initializes the appearance of certain visual components.
@@ -106,8 +117,10 @@ public final class ChatScene implements Restorable {
 		messageList.setCellFactory(MessageListCellFactory::new);
 		userList.setCellFactory(ContactListCellFactory::new);
 
-		settingsButton.setGraphic(new ImageView(IconUtil.loadIconThemeSensitive("settings", 16)));
-		voiceButton.setGraphic(new ImageView(IconUtil.loadIconThemeSensitive("microphone", 20)));
+		settingsButton.setGraphic(new ImageView(IconUtil.loadIconThemeSensitive("settings", DEFAULT_ICON_SIZE)));
+		voiceButton.setGraphic(new ImageView(IconUtil.loadIconThemeSensitive("microphone", DEFAULT_ICON_SIZE)));
+		attachmentButton.setGraphic(new ImageView(IconUtil.loadIconThemeSensitive("attachment", DEFAULT_ICON_SIZE)));
+		attachmentView.setImage(DEFAULT_ATTACHMENT_VIEW_IMAGE);
 
 		// Listen to received messages
 		eventBus.register(MessageCreationEvent.class, e -> {
@@ -226,7 +239,7 @@ public final class ChatScene implements Restorable {
 				recording = false;
 			}
 			pendingAttachment = null;
-			attachmentView.setVisible(false);
+			updateAttachmentView(false);
 
 			remainingChars.setVisible(true);
 			remainingChars
@@ -234,6 +247,7 @@ public final class ChatScene implements Restorable {
 		}
 		messageTextArea.setDisable(currentChat == null || postingPermanentlyDisabled);
 		voiceButton.setDisable(!recorder.isSupported());
+		attachmentButton.setDisable(false);
 	}
 
 	/**
@@ -266,18 +280,17 @@ public final class ChatScene implements Restorable {
 					recording = true;
 					Platform.runLater(() -> {
 						voiceButton.setText("Recording");
-						voiceButton.setGraphic(new ImageView(IconUtil.loadIcon("microphone_recording", 24)));
+						voiceButton.setGraphic(new ImageView(IconUtil.loadIcon("microphone_recording", DEFAULT_ICON_SIZE)));
 					});
 					recorder.start();
 				} else {
 					pendingAttachment	= new Attachment(recorder.finish(), AttachmentType.VOICE);
 					recording			= false;
 					Platform.runLater(() -> {
-						voiceButton.setGraphic(new ImageView(IconUtil.loadIconThemeSensitive("microphone", 20)));
+						voiceButton.setGraphic(new ImageView(IconUtil.loadIconThemeSensitive("microphone", DEFAULT_ICON_SIZE)));
 						voiceButton.setText(null);
 						checkPostConditions(false);
-						attachmentView.setImage(IconUtil.loadIconThemeSensitive("attachment_present", 20));
-						attachmentView.setVisible(true);
+						updateAttachmentView(true);
 					});
 				}
 			} catch (final EnvoyException e) {
@@ -287,6 +300,52 @@ public final class ChatScene implements Restorable {
 		}).start();
 	}
 
+	@FXML
+	private void attachmentButtonClicked() {
+
+		// Display file chooser
+		final var fileChooser = new FileChooser();
+		fileChooser.setTitle("Add Attachment");
+		fileChooser.setInitialDirectory(new File(System.getProperty("user.home")));
+		fileChooser.getExtensionFilters()
+			.addAll(new FileChooser.ExtensionFilter("Pictures", "*.png", "*.jpg", "*.bmp", "*.gif"),
+					new FileChooser.ExtensionFilter("Videos", "*.mp4"),
+					new FileChooser.ExtensionFilter("All Files", "*.*"));
+		final var file = fileChooser.showOpenDialog(sceneContext.getStage());
+
+		if (file != null) {
+
+			// Check max file size
+			if (file.length() > 16E6) {
+				new Alert(AlertType.WARNING, "The selected file exceeds the size limit of 16MB!").showAndWait();
+				return;
+			}
+
+			// Get attachment type (default is document)
+			AttachmentType type = AttachmentType.DOCUMENT;
+			switch (fileChooser.getSelectedExtensionFilter().getDescription()) {
+				case "Pictures":
+					type = AttachmentType.PICTURE;
+					break;
+				case "Videos":
+					type = AttachmentType.VIDEO;
+					break;
+			}
+
+			// Create the pending attachment
+			try {
+				final var fileBytes = Files.readAllBytes(file.toPath());
+				pendingAttachment = new Attachment(fileBytes, type);
+				// Setting the preview image as image of the attachmentView
+				if (type == AttachmentType.PICTURE)
+					attachmentView.setImage(new Image(new ByteArrayInputStream(fileBytes), DEFAULT_ICON_SIZE, DEFAULT_ICON_SIZE, true, true));
+				attachmentView.setVisible(true);
+			} catch (final IOException e) {
+				new Alert(AlertType.ERROR, "The selected file could not be loaded!").showAndWait();
+			}
+		}
+	}
+
 	/**
 	 * Checks the text length of the {@code messageTextArea}, adjusts the
 	 * {@code remainingChars} label and checks whether to send the message
@@ -373,16 +432,16 @@ public final class ChatScene implements Restorable {
 		final var text = messageTextArea.getText().strip();
 		try {
 			// Creating the message and its metadata
-			final var	builder	= new MessageBuilder(localDB.getUser().getID(), currentChat.getRecipient().getID(), localDB.getIDGenerator())
+			final var builder = new MessageBuilder(localDB.getUser().getID(), currentChat.getRecipient().getID(), localDB.getIDGenerator())
 				.setText(text);
-      // Setting an attachment, if present
-      if (pendingAttachment != null) {
+			// Setting an attachment, if present
+			if (pendingAttachment != null) {
 				builder.setAttachment(pendingAttachment);
 				pendingAttachment = null;
-				attachmentView.setVisible(false);
+				updateAttachmentView(false);
 			}
-      // Building the final message
-			final var	message	= currentChat.getRecipient() instanceof Group ? builder.buildGroupMessage((Group) currentChat.getRecipient())
+			// Building the final message
+			final var message = currentChat.getRecipient() instanceof Group ? builder.buildGroupMessage((Group) currentChat.getRecipient())
 					: builder.build();
 
 			// Send message
@@ -428,6 +487,20 @@ public final class ChatScene implements Restorable {
 		infoLabel.setVisible(true);
 	}
 
+	/**
+	 * Updates the {@code attachmentView} in terms of visibility.<br>
+	 * Additionally resets the shown image to
+	 * {@code DEFAULT_ATTACHMENT_VIEW_IMAGE} if another image is currently
+	 * present.
+	 *
+	 * @param visible whether the {@code attachmentView} should be displayed
+	 * @since Envoy Client v0.1-beta
+	 */
+	private void updateAttachmentView(boolean visible) {
+		if (!attachmentView.getImage().equals(DEFAULT_ATTACHMENT_VIEW_IMAGE)) attachmentView.setImage(DEFAULT_ATTACHMENT_VIEW_IMAGE);
+		attachmentView.setVisible(visible);
+	}
+
 	// Context menu actions
 
 	@FXML

src/main/java/envoy/client/ui/listcell/MessageControl.java

@@ -2,6 +2,7 @@ package envoy.client.ui.listcell;
 
 import java.awt.Toolkit;
 import java.awt.datatransfer.StringSelection;
+import java.io.ByteArrayInputStream;
 import java.time.format.DateTimeFormatter;
 import java.util.Map;
 import java.util.logging.Level;
@@ -67,6 +68,7 @@ public class MessageControl extends Label {
 		if (message.hasAttachment()) {
 			switch (message.getAttachment().getType()) {
 				case PICTURE:
+					vbox.getChildren().add(new ImageView(new Image(new ByteArrayInputStream(message.getAttachment().getData()), 256, 256, true, true)));
 					break;
 				case VIDEO:
 					break;
@@ -90,9 +92,7 @@ public class MessageControl extends Label {
 			statusIcon.setPreserveRatio(true);
 			vbox.getChildren().add(statusIcon);
 			getStyleClass().add("own-message");
-		} else {
-			getStyleClass().add("received-message");
-		}
+		} else getStyleClass().add("received-message");
 		// Adjusting height and weight of the cell to the corresponding ListView
 		paddingProperty().setValue(new Insets(5, 20, 5, 20));
 		setContextMenu(contextMenu);

src/main/resources/fxml/ChatScene.fxml

@@ -51,7 +51,7 @@
 				<Insets bottom="5.0" left="10.0" />
 			</GridPane.margin>
 			<padding>
-				<Insets bottom="5.0" left="5.0" right="5.0" top="5.0" />
+				<Insets bottom="5.0" left="5.0" right="2.0" top="5.0" />
 			</padding>
 			<contextMenu>
 				<ContextMenu anchorLocation="CONTENT_TOP_LEFT">
@@ -82,24 +82,29 @@
 				<Insets bottom="5.0" left="5.0" right="5.0" top="5.0" />
 			</padding>
 		</Button>
-		<ListView fx:id="messageList" prefHeight="257.0"
-			prefWidth="465.0" GridPane.columnIndex="1"
+		<ListView fx:id="messageList" GridPane.columnIndex="1"
 			GridPane.columnSpan="2147483647" GridPane.rowIndex="1"
 			GridPane.rowSpan="2">
 			<GridPane.margin>
 				<Insets left="5.0" right="10.0" />
 			</GridPane.margin>
 			<padding>
-				<Insets bottom="5.0" left="5.0" right="5.0" top="5.0" />
+				<Insets bottom="5.0" left="5.0" right="2.0" top="5.0" />
 			</padding>
 		</ListView>
-		<ButtonBar prefWidth="436.0" GridPane.columnIndex="1"
+		<ButtonBar buttonMinWidth="40.0" GridPane.columnIndex="1"
 			GridPane.columnSpan="2147483647" GridPane.halignment="CENTER"
 			GridPane.rowIndex="5" GridPane.valignment="BOTTOM">
 			<GridPane.margin>
 				<Insets right="10.0" />
 			</GridPane.margin>
 			<buttons>
+				<Button fx:id="attachmentButton" disable="true"
+					mnemonicParsing="false" onAction="#attachmentButtonClicked">
+					<padding>
+						<Insets bottom="5.0" left="5.0" right="5.0" top="5.0" />
+					</padding>
+				</Button>
 				<Button fx:id="voiceButton" disable="true"
 					onAction="#voiceButtonClicked">
 					<padding>
@@ -175,7 +180,7 @@
 		</Label>
 		<Label fx:id="infoLabel" text="Something happened"
 			textFill="#faa007" visible="false" wrapText="true"
-			GridPane.columnIndex="1" GridPane.rowIndex="1">
+			GridPane.columnIndex="1">
 			<GridPane.margin>
 				<Insets bottom="5.0" left="5.0" right="5.0" top="5.0" />
 			</GridPane.margin>