Initial commit

.gitignore

@@ -0,0 +1,3 @@
+.gradle
+.idea
+build

build.gradle

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+plugins {
+    id 'java'
+    id 'application'
+    id "com.github.johnrengelman.shadow" version "5.2.0"
+}
+
+group 'com.annimon'
+version '1.0-SNAPSHOT'
+mainClassName = 'com.annimon.imagetagger.Main'
+
+repositories {
+    mavenCentral()
+}
+
+ext.jacksonVersion = '2.12.0'
+
+dependencies {
+    implementation "com.fasterxml.jackson.core:jackson-core:$jacksonVersion"
+    implementation "com.fasterxml.jackson.core:jackson-annotations:$jacksonVersion"
+    implementation "com.fasterxml.jackson.core:jackson-databind:$jacksonVersion"
+    testImplementation 'junit:junit:4.13.1'
+}

gradle/wrapper/gradle-wrapper.properties

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+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.7.1-bin.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists

gradlew

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+#!/usr/bin/env sh
+
+#
+# Copyright 2015 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.
+#
+
+##############################################################################
+##
+##  Gradle start up script for UN*X
+##
+##############################################################################
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn () {
+    echo "$*"
+}
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MINGW* )
+    msys=true
+    ;;
+  NONSTOP* )
+    nonstop=true
+    ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+        JAVACMD="$JAVA_HOME/bin/java"
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD="java"
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
+    MAX_FD_LIMIT=`ulimit -H -n`
+    if [ $? -eq 0 ] ; then
+        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+            MAX_FD="$MAX_FD_LIMIT"
+        fi
+        ulimit -n $MAX_FD
+        if [ $? -ne 0 ] ; then
+            warn "Could not set maximum file descriptor limit: $MAX_FD"
+        fi
+    else
+        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+    fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then
+    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+    JAVACMD=`cygpath --unix "$JAVACMD"`
+
+    # We build the pattern for arguments to be converted via cygpath
+    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    SEP=""
+    for dir in $ROOTDIRSRAW ; do
+        ROOTDIRS="$ROOTDIRS$SEP$dir"
+        SEP="|"
+    done
+    OURCYGPATTERN="(^($ROOTDIRS))"
+    # Add a user-defined pattern to the cygpath arguments
+    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+    fi
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    i=0
+    for arg in "$@" ; do
+        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+
+        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
+            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+        else
+            eval `echo args$i`="\"$arg\""
+        fi
+        i=`expr $i + 1`
+    done
+    case $i in
+        0) set -- ;;
+        1) set -- "$args0" ;;
+        2) set -- "$args0" "$args1" ;;
+        3) set -- "$args0" "$args1" "$args2" ;;
+        4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+    esac
+fi
+
+# Escape application args
+save () {
+    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
+    echo " "
+}
+APP_ARGS=`save "$@"`
+
+# Collect all arguments for the java command, following the shell quoting and substitution rules
+eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
+
+exec "$JAVACMD" "$@"

gradlew.bat

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+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto init
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto init
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:init
+@rem Get command-line arguments, handling Windows variants
+
+if not "%OS%" == "Windows_NT" goto win9xME_args
+
+:win9xME_args
+@rem Slurp the command line arguments.
+set CMD_LINE_ARGS=
+set _SKIP=2
+
+:win9xME_args_slurp
+if "x%~1" == "x" goto execute
+
+set CMD_LINE_ARGS=%*
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

settings.gradle

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+rootProject.name = 'imagetagger'
+

src/main/java/com/annimon/imagetagger/Main.java

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+package com.annimon.imagetagger;
+
+import com.annimon.imagetagger.beans.Config;
+import com.annimon.imagetagger.logic.ImageProcessor;
+import com.annimon.imagetagger.logic.KeyProcessor;
+import com.annimon.imagetagger.views.ImagePanel;
+import com.annimon.imagetagger.views.TagPanel;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import java.awt.*;
+import java.awt.event.KeyAdapter;
+import java.awt.event.KeyEvent;
+import java.io.File;
+import java.io.IOException;
+import javax.swing.*;
+
+public class Main extends JFrame {
+
+    public static void main(String[] args) throws IOException {
+        final var file = new File("imagetagger.json");
+        final var mapper = new ObjectMapper();
+        final var config = mapper.readValue(file, Config.class);
+        if (args.length > 0 && args[0].equalsIgnoreCase("validate")) {
+            config.validate();
+            return;
+        }
+
+        var main = new Main(config);
+        main.setVisible(true);
+    }
+
+    public Main(Config config) {
+        super("ImageTagger");
+
+        final var tagButtons = config.getButtons(config.getProfile());
+        final var tagPanel = new TagPanel(tagButtons);
+        final var imageProcessor = new ImageProcessor(config.getDir(), config.getFilter(), config.getSort());
+        final var imagePanel = new ImagePanel(imageProcessor);
+        final var keyProcessor = new KeyProcessor(tagButtons);
+        keyProcessor.setTagPanel(tagPanel);
+        keyProcessor.setImagePanel(imagePanel);
+        keyProcessor.setImageProcessor(imageProcessor);
+        imageProcessor.populateFiles();
+        tagPanel.enableSupportedTags(imageProcessor.getTags());
+
+        setPreferredSize(new Dimension(800, 600));
+        setLayout(new BorderLayout());
+        add(tagPanel, BorderLayout.SOUTH);
+        add(imagePanel, BorderLayout.CENTER);
+        addKeyListener(new KeyAdapter() {
+            @Override
+            public void keyPressed(KeyEvent e) {
+                keyProcessor.keyPressed(e);
+            }
+        });
+        setResizable(true);
+        setLocationByPlatform(true);
+        setDefaultCloseOperation(EXIT_ON_CLOSE);
+        pack();
+    }
+}

src/main/java/com/annimon/imagetagger/beans/Config.java

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+package com.annimon.imagetagger.beans;
+
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+
+@JsonIgnoreProperties(ignoreUnknown = true)
+public class Config {
+
+    private String dir;
+    private String filter;
+    private String sort;
+    private String profile;
+    private Map<String, List<TagButton>> tags;
+
+    public Config() {
+    }
+
+    public String getDir() {
+        return dir;
+    }
+
+    public String getFilter() {
+        return Objects.requireNonNullElse(filter, "");
+    }
+
+    public String getSort() {
+        return Objects.requireNonNullElse(sort, "");
+    }
+
+    public String getProfile() {
+        return profile;
+    }
+
+    public Map<String, List<TagButton>> getTags() {
+        return tags;
+    }
+
+    public List<TagButton> getButtons(String profile) {
+        return tags.get(profile);
+    }
+
+    public void validate() {
+        final var errors = new HashSet<String>();
+        final var uniqueTags = new HashMap<String, String>();
+        final var uniqueKeys = new HashSet<String>();
+        for (var entry : tags.entrySet()) {
+            final var profile = entry.getKey();
+            final var tagButtons = entry.getValue();
+
+            uniqueKeys.clear();
+            for (var tb : tagButtons) {
+                // Detect duplicate keys in profile
+                boolean isUnique = uniqueKeys.add(tb.getKey());
+                if (!isUnique) {
+                    errors.add(String.format("Duplicate key %s in profile %s", tb.getKey(), profile));
+                }
+
+                // Detect duplicate tags globally
+                String previousProfile = uniqueTags.put(tb.getTag(), profile);
+                if (previousProfile != null) {
+                    errors.add(String.format("Tag %s in profile %s was already defined in %s", tb.getTag(), profile, previousProfile));
+                }
+            }
+        }
+        if (errors.isEmpty()) {
+            System.out.println("All checks passed");
+        } else {
+            errors.forEach(System.err::println);
+        }
+    }
+}

src/main/java/com/annimon/imagetagger/beans/ImageInfo.java

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+package com.annimon.imagetagger.beans;
+
+import java.io.File;
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.Collection;
+import java.util.HashSet;
+import java.util.Set;
+import java.util.stream.Collectors;
+
+public class ImageInfo {
+    private static final String PREFIX = "-IPTC:keywords=";
+
+    private final File file;
+    private final Set<String> tags;
+
+    public ImageInfo(File file) {
+        this.file = file;
+        tags = new HashSet<>();
+    }
+
+    public File getFile() {
+        return file;
+    }
+
+    public int getTagsCount() {
+        return tags.size();
+    }
+
+    public Set<String> getTags() {
+        return tags;
+    }
+
+    public void setTags(Collection<String> newTags) {
+        tags.clear();
+        tags.addAll(newTags);
+    }
+
+    public ImageInfo loadTagFile() {
+        final var tagFilePath = tagFilePath();
+        if (Files.exists(tagFilePath)) {
+            try {
+                final var lines = Files.lines(tagFilePath)
+                        .map(s -> s.replace(PREFIX, ""))
+                        .collect(Collectors.toList());
+                setTags(lines);
+            } catch (IOException e) {
+                throw new RuntimeException(e);
+            }
+        }
+        return this;
+    }
+
+    public void writeTagFile() {
+        final var lines = tags.stream()
+                .sorted()
+                .map(s -> PREFIX + s)
+                .collect(Collectors.toList());
+        try {
+            Files.write(tagFilePath(), lines);
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    private Path tagFilePath() {
+        return Path.of(file.getParent(), file.getName() + ".txt");
+    }
+}

src/main/java/com/annimon/imagetagger/beans/TagButton.java

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+package com.annimon.imagetagger.beans;
+
+public class TagButton {
+
+    private String key;
+    private String tag;
+
+    public TagButton() {
+    }
+
+    public String getKey() {
+        return key;
+    }
+
+    public void setKey(String key) {
+        this.key = key;
+    }
+
+    public String getTag() {
+        return tag;
+    }
+
+    public void setTag(String tag) {
+        this.tag = tag;
+    }
+}

src/main/java/com/annimon/imagetagger/beans/TagButtonHolder.java

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+package com.annimon.imagetagger.beans;
+
+import javax.swing.*;
+
+public class TagButtonHolder {
+
+    private final TagButton tagButton;
+    private final JLabel label;
+
+    public TagButtonHolder(TagButton tagButton, JLabel label) {
+        this.tagButton = tagButton;
+        this.label = label;
+    }
+
+    public TagButton getTagButton() {
+        return tagButton;
+    }
+
+    public JLabel getLabel() {
+        return label;
+    }
+}

src/main/java/com/annimon/imagetagger/logic/ImageProcessor.java

@@ -0,0 +1,156 @@
+package com.annimon.imagetagger.logic;
+
+import com.annimon.imagetagger.beans.ImageInfo;
+import java.awt.*;
+import java.io.File;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.Comparator;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+import javax.imageio.ImageIO;
+
+public class ImageProcessor {
+
+    private final File dir;
+    private final String filter;
+    private final String sort;
+    private final List<ImageInfo> imageInfos;
+    private int imagesCount;
+    private int index;
+    private ImageInfo currentInfo;
+    private Image image;
+
+    public ImageProcessor(String dir, String filter, String sort) {
+        this.dir = new File(dir);
+        this.filter = filter;
+        this.sort = sort;
+        imageInfos = new ArrayList<>();
+        imagesCount = 0;
+    }
+
+    public Image getImage() {
+        return image;
+    }
+
+    public String getFilename() {
+        if (currentInfo != null) {
+            return currentInfo.getFile().getName();
+        }
+        return "";
+    }
+
+    public String getIndexInfo() {
+        int tagsCount = (currentInfo == null) ? 0 : currentInfo.getTags().size();
+        return String.format("%d / %d, %d tags",
+                index + 1, imagesCount, tagsCount);
+    }
+
+    public void prevImage() {
+        index--;
+        if (index < 0) {
+            index = imagesCount - 1;
+        }
+        loadImage();
+    }
+
+    public void nextImage() {
+        index++;
+        if (index >= imagesCount) {
+            index = 0;
+        }
+        loadImage();
+    }
+
+    public void writeTagsToFile() {
+        if (currentInfo != null) {
+            currentInfo.writeTagFile();
+        }
+    }
+
+    public Set<String> getTags() {
+        if (currentInfo != null) {
+            return currentInfo.getTags();
+        }
+        return Collections.emptySet();
+    }
+
+    public void mergeTags(Set<String> tagsToAdd, Set<String> tagsToRemove) {
+        if (currentInfo != null) {
+            final var tags = new HashSet<>(currentInfo.getTags());
+            tags.removeAll(tagsToRemove);
+            tags.addAll(tagsToAdd);
+            currentInfo.setTags(tags);
+        }
+    }
+
+    public void populateFiles() {
+        final var files = dir.listFiles();
+        if (files == null) {
+            throw new RuntimeException("There are no files in directory " + dir);
+        }
+        final var infos = Arrays.stream(files)
+                .filter(this::allowedFiles)
+                .map(ImageInfo::new)
+                .map(ImageInfo::loadTagFile)
+                .filter(this::filterTags)
+                .collect(Collectors.toList());
+        sort(infos);
+        imageInfos.clear();
+        imageInfos.addAll(infos);
+        imagesCount = imageInfos.size();
+        if (imagesCount > 0) {
+            index = 0;
+            loadImage();
+        }
+    }
+
+    private void loadImage() {
+        if (index < 0 || index >= imagesCount) return;
+
+        currentInfo = imageInfos.get(index);
+        try {
+            image = ImageIO.read(currentInfo.getFile());
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    private boolean allowedFiles(File file) {
+        final String filename = file.getName().toLowerCase();
+        return Stream.of(".jpg", ".png", ".jpeg", ".gif")
+                .anyMatch(filename::endsWith);
+    }
+
+    private boolean filterTags(ImageInfo info) {
+        if (filter.isEmpty()) {
+            return true;
+        }
+        return Arrays.stream(filter.split(","))
+                .map(String::trim)
+                .filter(s -> s.startsWith("+") || s.startsWith("-"))
+                .map(String::toLowerCase)
+                .allMatch(s -> {
+                    final String tag = s.substring(1);
+                    final boolean hasTag = info.getTags().contains(tag);
+                    return s.startsWith("-") ? !hasTag : hasTag;
+                });
+    }
+
+    private void sort(List<ImageInfo> infos) {
+        if (sort.contains("name")) {
+            infos.sort(Comparator.comparing(ImageInfo::getFile));
+        }
+        if (sort.contains("tags.count")) {
+            infos.sort(Comparator.comparingInt(ImageInfo::getTagsCount));
+        }
+        if (sort.contains("random")) {
+            Collections.shuffle(infos);
+        }
+    }
+}

src/main/java/com/annimon/imagetagger/logic/KeyProcessor.java

@@ -0,0 +1,63 @@
+package com.annimon.imagetagger.logic;
+
+import com.annimon.imagetagger.beans.TagButton;
+import com.annimon.imagetagger.views.ImagePanel;
+import com.annimon.imagetagger.views.TagPanel;
+import java.awt.event.KeyEvent;
+import java.util.List;
+import java.util.Set;
+import java.util.stream.Collectors;
+
+public class KeyProcessor {
+
+    private final Set<String> keys;
+    private TagPanel tagPanel;
+    private ImagePanel imagePanel;
+    private ImageProcessor imageProcessor;
+
+    public KeyProcessor(List<TagButton> buttons) {
+        keys = buttons.stream()
+                .map(TagButton::getKey)
+                .collect(Collectors.toSet());
+    }
+
+    public void setTagPanel(TagPanel tagPanel) {
+        this.tagPanel = tagPanel;
+    }
+
+    public void setImagePanel(ImagePanel imagePanel) {
+        this.imagePanel = imagePanel;
+    }
+
+    public void setImageProcessor(ImageProcessor imageProcessor) {
+        this.imageProcessor = imageProcessor;
+    }
+
+    public void keyPressed(KeyEvent e) {
+        switch (e.getKeyCode()) {
+            case KeyEvent.VK_LEFT:
+                imageProcessor.mergeTags(tagPanel.getEnabledTags(), tagPanel.getDisabledTags());
+                imageProcessor.prevImage();
+                imagePanel.repaint();
+                tagPanel.enableSupportedTags(imageProcessor.getTags());
+                tagPanel.repaint();
+                break;
+            case KeyEvent.VK_RIGHT:
+                imageProcessor.mergeTags(tagPanel.getEnabledTags(), tagPanel.getDisabledTags());
+                imageProcessor.nextImage();
+                imagePanel.repaint();
+                tagPanel.enableSupportedTags(imageProcessor.getTags());
+                tagPanel.repaint();
+                break;
+            case KeyEvent.VK_ENTER:
+                imageProcessor.mergeTags(tagPanel.getEnabledTags(), tagPanel.getDisabledTags());
+                imageProcessor.writeTagsToFile();
+                break;
+            default:
+                final var key = String.valueOf(e.getKeyChar());
+                if (keys.contains(key)) {
+                    tagPanel.toggle(key);
+                }
+        }
+    }
+}

src/main/java/com/annimon/imagetagger/views/ImagePanel.java

@@ -0,0 +1,66 @@
+package com.annimon.imagetagger.views;
+
+import com.annimon.imagetagger.logic.ImageProcessor;
+import java.awt.*;
+import javax.swing.*;
+
+public class ImagePanel extends JPanel {
+
+    private static final Color TEXT_COLOR = new Color(0x80FFFFFF, true);
+    private final ImageProcessor imageProcessor;
+
+    public ImagePanel(ImageProcessor imageProcessor) {
+        this.imageProcessor = imageProcessor;
+    }
+
+    @SuppressWarnings("UnusedAssignment")
+    @Override
+    protected void paintComponent(Graphics g) {
+        super.paintComponent(g);
+        final var g2d = (Graphics2D) g;
+        final int width = getWidth();
+        final int height = getHeight();
+        var image = imageProcessor.getImage();
+        if ((width <= 5) || (height <= 5) || (image == null)) {
+            return;
+        }
+
+        final int imgWidth = image.getWidth(this);
+        final int imgHeight = image.getHeight(this);
+        int scaleX = imgWidth;
+        int scaleY = imgHeight;
+        if (imgWidth > width || imgHeight > height) {
+            if (scaleX > width) {
+                // Fit by width
+                scaleX = width;
+                scaleY = imgHeight * scaleX / imgWidth;
+            }
+            if (scaleY > height) {
+                // Fit by height
+                scaleY = height;
+                scaleX = imgWidth * scaleY / imgHeight;
+            }
+            image = image.getScaledInstance(scaleX, scaleY, Image.SCALE_SMOOTH);
+        }
+
+        final int x = (width - scaleX) / 2;
+        final int y = (height - scaleY) / 2;
+        g2d.drawImage(image, x, y, this);
+
+        int yy = 5;
+        yy = drawString(g2d, imageProcessor.getFilename(), 5, yy);
+        yy = drawString(g2d, imageProcessor.getIndexInfo(), 5, yy);
+    }
+
+    @SuppressWarnings("SameParameterValue")
+    private int drawString(Graphics2D g2d, String filename, int x, int y) {
+        final var bounds = g2d.getFontMetrics().getStringBounds(filename, g2d);
+        final var strWidth = (int) bounds.getWidth();
+        final var strHeight = (int) bounds.getHeight();
+        g2d.setColor(TEXT_COLOR);
+        g2d.fillRect(x, y, strWidth + 6, strHeight + 6);
+        g2d.setColor(Color.BLACK);
+        g2d.drawString(filename, x + 2, y + strHeight + 1);
+        return y + strHeight + 6;
+    }
+}

src/main/java/com/annimon/imagetagger/views/TagPanel.java

@@ -0,0 +1,84 @@
+package com.annimon.imagetagger.views;
+
+import com.annimon.imagetagger.beans.TagButton;
+import com.annimon.imagetagger.beans.TagButtonHolder;
+import java.awt.*;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.function.Predicate;
+import java.util.stream.Collectors;
+import javax.swing.*;
+
+public class TagPanel extends JPanel {
+
+    private static final int MAX_COLORS = 8;
+
+    private final Map<String, TagButtonHolder> tagButtons;
+
+    public TagPanel(List<TagButton> buttons) {
+        tagButtons = new LinkedHashMap<>();
+
+        setLayout(new BoxLayout(this, BoxLayout.LINE_AXIS));
+        for (TagButton button : buttons) {
+            final var key = button.getKey();
+            final var label = new JLabel(key + ": " + button.getTag());
+            label.setBorder(BorderFactory.createEmptyBorder(3, 6, 3, 6));
+            label.setOpaque(true);
+            label.setEnabled(false);
+            setBackground(label, button);
+            add(label);
+            tagButtons.put(key, new TagButtonHolder(button, label));
+        }
+    }
+
+    private void setBackground(JLabel label, TagButton button) {
+        final boolean enabled = label.isEnabled();
+        final float hue = (button.getTag().hashCode() % MAX_COLORS) * (1f / MAX_COLORS);
+        final var color = Color.getHSBColor(hue, enabled ? 0.99f : 0.6f, enabled ? 0.95f : 0.28f);
+        label.setBackground(color);
+    }
+
+    public void toggle(String key) {
+        final var holder = tagButtons.get(key);
+        if (holder != null) {
+            final var label = holder.getLabel();
+            label.setEnabled(!label.isEnabled());
+            setBackground(label, holder.getTagButton());
+        }
+    }
+
+    public Set<String> getAllTags() {
+        return filterTags(h -> true);
+    }
+
+    public Set<String> getEnabledTags() {
+        return filterTags(enabledLabelPredicate());
+    }
+
+    public Set<String> getDisabledTags() {
+        return filterTags(enabledLabelPredicate().negate());
+    }
+
+    private Predicate<TagButtonHolder> enabledLabelPredicate() {
+        return h -> h.getLabel().isEnabled();
+    }
+
+    private Set<String> filterTags(Predicate<TagButtonHolder> predicate) {
+        return tagButtons.values().stream()
+                .filter(predicate)
+                .map(h -> h.getTagButton().getTag())
+                .collect(Collectors.toSet());
+    }
+
+    public void enableSupportedTags(Set<String> tags) {
+        tagButtons.forEach((key, holder) -> {
+            final var label = holder.getLabel();
+            final var tagButton = holder.getTagButton();
+            final var containsTag = tags.contains(tagButton.getTag());
+            label.setEnabled(containsTag);
+            setBackground(label, tagButton);
+        });
+    }
+}