Add ItemFilter.java (not committed by accident)

.gitattributes

@@ -15022,6 +15022,7 @@ src/main/java/forge/gui/toolbox/itemmanager/filters/CardQuestWorldFilter.java -t
 src/main/java/forge/gui/toolbox/itemmanager/filters/CardSetFilter.java -text
 src/main/java/forge/gui/toolbox/itemmanager/filters/CardToughnessFilter.java -text
 src/main/java/forge/gui/toolbox/itemmanager/filters/CardTypeFilter.java -text
+src/main/java/forge/gui/toolbox/itemmanager/filters/ItemFilter.java -text
 src/main/java/forge/gui/toolbox/itemmanager/filters/ListLabelFilter.java -text
 src/main/java/forge/gui/toolbox/itemmanager/filters/TextFieldFilter.java -text
 src/main/java/forge/gui/toolbox/itemmanager/filters/ToggleButtonsFilter.java -text

src/main/java/forge/gui/toolbox/itemmanager/filters/ItemFilter.java

@@ -0,0 +1,50 @@
+package forge.gui.toolbox.itemmanager.filters;
+
+import javax.swing.JPanel;
+
+import forge.Command;
+import forge.gui.toolbox.FLabel;
+import forge.gui.toolbox.itemmanager.ItemManager;
+import forge.item.InventoryItem;
+
+/** 
+ * TODO: Write javadoc for this type.
+ *
+ */
+@SuppressWarnings("serial")
+public abstract class ItemFilter<T extends InventoryItem> extends JPanel {
+    private final ItemManager<T> itemManager;
+    
+    public enum FilterTypes {
+        CardCMC,
+        CardColor,
+        CardFormat,
+        CardPower,
+        CardQuestWorld,
+        CardSet,
+        CardToughness,
+        CardType
+    }
+    
+    protected ItemFilter(ItemManager<T> itemManager0) {
+        this.itemManager = itemManager0;
+        this.setOpaque(false);
+        this.addComponents();
+        this.add(new FLabel.Builder().text("X").fontSize(10).hoverable(true)
+                .tooltip("Remove filter").cmdClick(new Command() {
+                    @Override
+                    public void run() {
+                        itemManager.removeFilter(ItemFilter.this);
+                        ItemFilter.this.onRemoved();
+                    }
+                }).build(), "top");
+    }
+    
+    protected void applyChange() {
+        itemManager.buildFilterPredicate();
+    }
+    
+    public abstract FilterTypes getType();
+    protected abstract void addComponents();
+    protected abstract void onRemoved();
+}