Added demo for rotatable icons.

Fixed rotated icon painting.
Fixed OverlayScrollPane layout.
Enhanced animations.

core/src/main/java/com/github/weisj/darklaf/components/OverlayScrollPane.java

@@ -132,16 +132,12 @@ public class OverlayScrollPane extends JLayeredPane {
 
     private static final class PopupScrollBar extends JScrollBar {
 
-        private final JScrollPane pane;
+        private PopupScrollBar(final int direction) {
-
-        private PopupScrollBar(final int direction, final JScrollPane pane) {
             super(direction);
-            this.pane = pane;
             putClientProperty("JScrollBar.fastWheelScrolling", true);
             setOpaque(false);
         }
 
-
         @Override
         public boolean isOpaque() {
             return false;
@@ -166,6 +162,7 @@ public class OverlayScrollPane extends JLayeredPane {
                 @Override
                 public void layoutContainer(final Container parent) {
                     super.layoutContainer(parent);
+                    viewport = getViewport();
                     if (viewport != null) {
                         Rectangle bounds = viewport.getBounds();
                         Rectangle vertBounds = verticalScrollBar.getBounds();
@@ -217,11 +214,11 @@ public class OverlayScrollPane extends JLayeredPane {
          */
         public void setUI(final ScrollPaneUI ui) {
             if (verticalScrollBar == null) {
-                verticalScrollBar = new PopupScrollBar(JScrollBar.VERTICAL, this);
+                verticalScrollBar = new PopupScrollBar(JScrollBar.VERTICAL);
                 verticalScrollBar.putClientProperty("JScrollBar.scrollPaneParent", this);
             }
             if (horizontalScrollBar == null) {
-                horizontalScrollBar = new PopupScrollBar(JScrollBar.HORIZONTAL, this);
+                horizontalScrollBar = new PopupScrollBar(JScrollBar.HORIZONTAL);
                 horizontalScrollBar.putClientProperty("JScrollBar.scrollPaneParent", this);
             }
             super.setUI(ui);
@@ -257,7 +254,6 @@ public class OverlayScrollPane extends JLayeredPane {
 
         private ControlPanel(final OScrollPane scrollPane) {
             setLayout(null);
-
             scrollPane.setVerticalScrollBar(scrollPane.verticalScrollBar);
             if (scrollPane.getVerticalScrollBarPolicy() != JScrollPane.VERTICAL_SCROLLBAR_NEVER) {
                 showVertical = true;

core/src/main/java/com/github/weisj/darklaf/ui/scrollpane/DarkScrollBarUI.java

@@ -436,6 +436,7 @@ public class DarkScrollBarUI extends BasicScrollBarUI {
             g.setColor(scrollbar.getBackground());
             g.fillRect(bounds.x, bounds.y, bounds.width, bounds.height);
         }
+        if (trackAlpha == 0) return;
         Graphics2D g2 = (Graphics2D) g.create();
         g2.setColor(getTrackColor());
         g2.setComposite(COMPOSITE.derive(trackAlpha));

core/src/main/java/com/github/weisj/darklaf/util/Animator.java

@@ -79,7 +79,7 @@ public abstract class Animator {
         ScheduledThreadPoolExecutor executor = new ScheduledThreadPoolExecutor(1, r -> {
             final Thread thread = new Thread(r, "Darcula Animations");
             thread.setDaemon(true);
-            thread.setPriority(Thread.NORM_PRIORITY);
+            thread.setPriority(Thread.MAX_PRIORITY);
             return thread;
         });
         executor.setContinueExistingPeriodicTasksAfterShutdownPolicy(false);

core/src/test/java/defaults/UIManagerDefaults.java

@@ -115,13 +115,11 @@ public class UIManagerDefaults implements ItemListener, ComponentDemo {
         ((DefaultTableModel) table.getModel()).setRowCount(0);
 
         buildItemsMap();
-
         final Vector<String> comboBoxItems = new Vector<>(50);
-
+        FontMetrics fm = comboBox.getFontMetrics(comboBox.getFont());
         for (final Object key : items.keySet()) {
             comboBoxItems.add((String) key);
         }
-
         comboBox.removeItemListener(this);
         comboBox.setModel(new DefaultComboBoxModel<>(comboBoxItems));
         comboBox.setSelectedIndex(-1);

core/src/test/java/icon/RotatableIconDemo.java

@@ -0,0 +1,59 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020 Jannis Weis
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package icon;
+
+import com.github.weisj.darklaf.icons.IconLoader;
+import com.github.weisj.darklaf.icons.RotatableIcon;
+import ui.ComponentDemo;
+import ui.DemoPanel;
+
+import javax.swing.*;
+
+public class RotatableIconDemo implements ComponentDemo {
+
+    public static void main(final String[] args) {
+        ComponentDemo.showDemo(new RotatableIconDemo());
+    }
+
+    @Override
+    public JComponent createComponent() {
+        RotatableIcon folderIcon = new RotatableIcon(
+            IconLoader.get().getIcon("files/folder.svg", 19, 19, true));
+        JLabel label = new JLabel(folderIcon);
+        SwingUtilities.invokeLater(() -> {
+            Timer timer = new Timer(1000, e -> {
+                folderIcon.setOrientation(folderIcon.getOrientation().clockwise());
+                label.repaint();
+            });
+            timer.setRepeats(true);
+            timer.start();
+        });
+        return new DemoPanel(label);
+    }
+
+    @Override
+    public String getTitle() {
+        return "RotatableIcon Demo";
+    }
+}

core/src/test/java/ui/tabFrame/TabFrameDemo.java

@@ -64,7 +64,7 @@ public class TabFrameDemo implements ComponentDemo {
 
     @Override
     public JComponent createComponent() {
-        Icon folderIcon = IconLoader.get().getUIAwareIcon("files/folder.svg", 19, 19);
+        Icon folderIcon = IconLoader.get().getIcon("files/folder.svg", 19, 19, true);
         JTabFrame tabFrame = new JTabFrame();
         for (Alignment o : Alignment.values()) {
             if (o != Alignment.CENTER) {

property-loader/src/main/java/com/github/weisj/darklaf/icons/DarkSVGIcon.java

@@ -27,7 +27,6 @@ import com.kitfox.svg.app.beans.SVGIcon;
 
 import javax.swing.*;
 import java.awt.*;
-import java.awt.geom.AffineTransform;
 import java.io.Serializable;
 import java.net.URI;
 import java.util.concurrent.atomic.AtomicBoolean;
@@ -108,8 +107,7 @@ public class DarkSVGIcon implements Icon, Serializable {
         Graphics2D g2 = (Graphics2D) g.create();
         g2.translate(x, y);
         if (rotation != 0) {
-            g2.setTransform(AffineTransform.getRotateInstance(rotation, size.width / 2.0,
+            g2.rotate(rotation, size.width / 2.0, size.height / 2.0);
-                                                              size.height / 2.0));
         }
         icon.setPreferredSize(size);
         icon.paintIcon(c, g2, 0, 0);

property-loader/src/main/java/com/github/weisj/darklaf/icons/RotatableIcon.java

@@ -39,10 +39,9 @@ public class RotatableIcon implements Icon {
         this(null);
     }
 
-
     public RotatableIcon(final Icon icon) {
         setIcon(icon);
-        this.alignment = null;
+        setOrientation(null);
     }
 
     public void setIcon(final Icon icon) {
@@ -110,6 +109,6 @@ public class RotatableIcon implements Icon {
     }
 
     public void setOrientation(final Alignment alignment) {
-        this.alignment = alignment;
+        this.alignment = alignment != null ? alignment : Alignment.NORTH;
     }
 }