Refreshing StampButtonList when StampImage loaded

src/main/java/de/ph87/kindermalen/Main.java

@@ -0,0 +1,14 @@
+package de.ph87.kindermalen;
+
+import lombok.extern.slf4j.Slf4j;
+
+@Slf4j
+public class Main {
+
+  public static void main(String[] args) {
+    final Environment environment = new Environment();
+    final Window window = new Window(environment);
+    window.setVisible(true);
+  }
+
+}

src/main/java/de/ph87/kindermalen/Sidebar.java

@@ -17,8 +17,6 @@ public class Sidebar extends JPanel {
 
   private ToolPanel toolPanel = null;
 
-  private StampPanel stamp;
-
   public Sidebar(final Environment environment) {
     setPreferredSize(new Dimension(300, 0));
     setLayout(new GridBagLayout());
@@ -44,23 +42,20 @@ public class Sidebar extends JPanel {
 
   private void onToolSelected(final Tool tool) {
     if (toolPanel != null) {
-      toolPanel.setVisible(false);
+      remove(toolPanel);
       toolPanel = null;
     }
 
     if (tool instanceof StampTool) {
-      if (stamp == null) {
-        stamp = new StampPanel((StampTool) tool);
-        add(stamp, C(0, 2, 1, 0.9));
-      }
-      toolPanel = stamp;
+      toolPanel = new StampPanel((StampTool) tool);
     }
 
     if (toolPanel != null) {
+      add(toolPanel, C(0, 2, 1, 0.9));
       toolPanel.setVisible(true);
     }
 
-    repaint();
+    revalidate();
   }
 
 }

src/main/java/de/ph87/kindermalen/Window.java

@@ -64,10 +64,4 @@ public class Window extends JFrame {
     setLocation(bounds.x, bounds.y);
   }
 
-  public static void main(String[] args) {
-    final Environment environment = new Environment();
-    final Window window = new Window(environment);
-    window.setVisible(true);
-  }
-
 }

src/main/java/de/ph87/kindermalen/tools/tool/stamp/StampButton.java

@@ -15,7 +15,7 @@ public class StampButton extends JPanel {
   private final StampTool tool;
 
   @Getter
-  private final Stamp stamp;
+  private final StampImage image;
 
   private final BufferedImage icon;
 
@@ -23,19 +23,19 @@ public class StampButton extends JPanel {
 
   private boolean hover = false;
 
-  public StampButton(final StampTool tool, final Stamp stamp) {
+  public StampButton(final StampTool tool, final StampImage image) {
     this.tool = tool;
-    this.stamp = stamp;
+    this.image = image;
     setPreferredSize(new Dimension(STAMP_BUTTON_SIZE, STAMP_BUTTON_SIZE));
     MouseListener.onRelease(this, this::onRelease);
     MouseListener.onEnter(this, this::onEnter);
     MouseListener.onExit(this, this::onExit);
-    icon = stamp.getSize(STAMP_BUTTON_ICON_REAL_SIZE);
+    icon = image.getSize(STAMP_BUTTON_ICON_REAL_SIZE);
     position = new Point((STAMP_BUTTON_SIZE - icon.getWidth()) / 2, (STAMP_BUTTON_SIZE - icon.getHeight()) / 2);
   }
 
   private void onRelease(final MouseEvent mouseEvent) {
-    this.tool.setStamp(stamp);
+    this.tool.setImage(image);
     this.tool.prepare();
   }
 
@@ -59,7 +59,7 @@ public class StampButton extends JPanel {
     if (hover) {
       g2.setColor(Color.yellow);
       highlight = true;
-    } else if (tool.getStamp() == stamp) {
+    } else if (tool.getImage() == image) {
       g2.setColor(Color.magenta);
       highlight = true;
     } else {

src/main/java/de/ph87/kindermalen/tools/tool/stamp/StampButtonList.java

@@ -0,0 +1,30 @@
+package de.ph87.kindermalen.tools.tool.stamp;
+
+import lombok.extern.slf4j.Slf4j;
+
+import javax.swing.*;
+import java.awt.*;
+import java.util.Comparator;
+import java.util.List;
+
+@Slf4j
+public class StampButtonList extends JPanel {
+
+  public StampButtonList(final StampTool stampTool) {
+    final FlowLayout flowLayout = new FlowLayout(FlowLayout.LEADING, 0, 0);
+    setLayout(flowLayout);
+    stampTool.onListChange(images -> add(stampTool, images));
+    add(stampTool, stampTool.getImages());
+    stampTool.onChange(ignore -> repaint());
+  }
+
+  private void add(final StampTool stampTool, final List<StampImage> images) {
+    removeAll();
+    for (final StampImage image : images.stream().sorted(Comparator.comparing(StampImage::getFile)).toList()) {
+      final StampButton button = new StampButton(stampTool, image);
+      add(button);
+    }
+    revalidate();
+  }
+
+}

src/main/java/de/ph87/kindermalen/tools/tool/stamp/StampImage.java

@@ -17,7 +17,7 @@ import static de.ph87.kindermalen.util.ImageHelper.RESIZE;
 @Slf4j
 @Getter
 @ToString
-public class Stamp {
+public class StampImage {
 
   private final String name;
 
@@ -27,7 +27,7 @@ public class Stamp {
 
   private final Map<Integer, BufferedImage> sizes = new HashMap<>();
 
-  public Stamp(final File file) throws IOException {
+  public StampImage(final File file) throws IOException {
     this.name = file.getName().substring(0, file.getName().lastIndexOf("."));
     this.file = file;
     this.original = ImageIO.read(file);

src/main/java/de/ph87/kindermalen/tools/tool/stamp/StampListPanel.java

@@ -1,23 +0,0 @@
-package de.ph87.kindermalen.tools.tool.stamp;
-
-import lombok.extern.slf4j.Slf4j;
-
-import javax.swing.*;
-import java.awt.*;
-
-import static de.ph87.kindermalen.CONFIG.BORDERS;
-
-@Slf4j
-public class StampListPanel extends JPanel {
-
-  public StampListPanel(final StampTool tool) {
-    setLayout(new FlowLayout(FlowLayout.LEADING, 0, 0));
-    tool.getStamps().forEach(stamp -> add(new StampButton(tool, stamp)));
-    tool.onChange(ignore -> repaint());
-    repaint();
-    if (BORDERS) {
-      setBackground(Color.green.brighter().brighter());
-    }
-  }
-
-}

src/main/java/de/ph87/kindermalen/tools/tool/stamp/StampOptions.java

@@ -5,7 +5,7 @@ import java.awt.*;
 
 import static de.ph87.kindermalen.CONFIG.BORDERS;
 
-public class StampOptionsPanel extends JPanel {
+public class StampOptions extends JPanel {
 
   private final JSlider sizeSlider = new JSlider(10, 1000, 100);
 
@@ -13,7 +13,7 @@ public class StampOptionsPanel extends JPanel {
 
   private final JSlider stepSlider = new JSlider(1, 1000, 25);
 
-  public StampOptionsPanel(final StampTool tool) {
+  public StampOptions(final StampTool tool) {
     setLayout(new GridLayout(6, 1));
 
     final JLabel sizeLabel = new JLabel("Größe:");

src/main/java/de/ph87/kindermalen/tools/tool/stamp/StampPanel.java

@@ -13,8 +13,8 @@ public class StampPanel extends ToolPanel {
 
   public StampPanel(final StampTool tool) {
     setLayout(new GridBagLayout());
-    add(new StampOptionsPanel(tool), C(0, 0, 1, 0, HORIZONTAL));
-    add(new StampListPanel(tool), C(0, 1, 1, 1));
+    add(new StampOptions(tool), C(0, 0, 1, 0, HORIZONTAL));
+    add(new StampButtonList(tool), C(0, 1, 1, 1));
   }
 
 }

src/main/java/de/ph87/kindermalen/tools/tool/stamp/StampTool.java

@@ -3,6 +3,8 @@ package de.ph87.kindermalen.tools.tool.stamp;
 import de.ph87.kindermalen.drawing.Drawing;
 import de.ph87.kindermalen.tools.tool.Tool;
 import de.ph87.kindermalen.util.Batch;
+import de.ph87.kindermalen.util.Publisher;
+import de.ph87.kindermalen.util.Subscription;
 import de.ph87.kindermalen.util.Vector;
 import lombok.Getter;
 import lombok.Setter;
@@ -14,6 +16,7 @@ import java.io.File;
 import java.io.IOException;
 import java.util.ArrayList;
 import java.util.List;
+import java.util.function.Consumer;
 import java.util.function.Supplier;
 import java.util.stream.Stream;
 
@@ -28,10 +31,12 @@ public class StampTool extends Tool {
 
   private static final File STAMPS_DIR = new File("./data/stamps");
 
-  private List<Stamp> stamps = new ArrayList<>();
+  private final List<StampImage> images = new ArrayList<>();
+
+  private final Publisher<List<StampImage>> onListChange = new Publisher<List<StampImage>>();
 
   @Setter
-  private Stamp stamp = null;
+  private StampImage image = null;
 
   @Setter
   private int size = 100;
@@ -46,20 +51,21 @@ public class StampTool extends Tool {
 
   public StampTool() {
     super("Stempel");
-    final Stream<Supplier<Stamp>> runnables = SCAN_FILES(STAMPS_DIR).stream().map(stamp -> () -> StampTool.this.load(stamp));
-    try {
-      stamps = new Batch<>(runnables.toList()).join();
-    } catch (InterruptedException e) {
-      log.error(e.toString());
-    }
-    if (stamp == null && !stamps.isEmpty()) {
-      setStamp(stamps.get(0));
+    final Stream<Supplier<StampImage>> runnables = SCAN_FILES(STAMPS_DIR).stream().map(stamp -> () -> load(stamp));
+    new Batch<>(runnables.toList());
+    if (image == null && !images.isEmpty()) {
+      setImage(images.get(0));
     }
   }
 
-  private Stamp load(final File file) {
+  private StampImage load(final File file) {
     try {
-      return new Stamp(file);
+      final StampImage image = new StampImage(file);
+      synchronized (images) {
+        images.add(image);
+        onListChange.publish(images);
+      }
+      return image;
     } catch (IOException e) {
       log.error(e.toString());
       return null;
@@ -67,12 +73,12 @@ public class StampTool extends Tool {
   }
 
   public void prepare() {
-    if (this.stamp == null || stamp.getOriginal() == null) {
+    if (this.image == null || image.getOriginal() == null) {
       return;
     }
-    prepared = RESIZE(stamp.getOriginal(), size, size);
+    prepared = RESIZE(image.getOriginal(), size, size);
     ALPHA(prepared, alpha);
-    log.info("Stamp prepared: {}", stamp.getName());
+    log.info("Stamp prepared: {}", image.getName());
     onChange.publish(this);
   }
 
@@ -101,4 +107,8 @@ public class StampTool extends Tool {
     return prepared;
   }
 
+  public Subscription<List<StampImage>> onListChange(final Consumer<List<StampImage>> next) {
+    return onListChange.subscribe(next);
+  }
+
 }

src/main/java/de/ph87/kindermalen/util/Batch.java

@@ -17,8 +17,6 @@ public class Batch<T> {
 
   private boolean stop = false;
 
-  private final List<T> results = new ArrayList<>();
-
   public Batch(final List<Supplier<T>> suppliers) {
     this.suppliers = new ArrayList<>(suppliers);
     synchronized (threads) {
@@ -37,12 +35,11 @@ public class Batch<T> {
     }
   }
 
-  public List<T> join() throws InterruptedException {
+  public void join() throws InterruptedException {
     synchronized (threads) {
       while (!threads.isEmpty()) {
         threads.wait();
       }
-      return results;
     }
   }
 
@@ -55,9 +52,6 @@ public class Batch<T> {
           return;
         }
         final T result = supplier.get();
-        synchronized (results) {
-          results.add(result);
-        }
       }
     } finally {
       synchronized (threads) {