From ac788bb2d3f115cd09deb8579b747dfc7736d89d Mon Sep 17 00:00:00 2001
From: Brendan Robert <brendan.robert@gmail.com>
Date: Sun, 20 Apr 2014 00:21:16 -0500
Subject: [PATCH] Start of drag/drop script assignment functionality

---
 .../ApplicationUIControllerImpl.java          | 10 +-
 .../outlaweditor/DragDropHelper.java          | 91 +++++++++++++++++++
 .../org/badvision/outlaweditor/MapEditor.java | 32 +++++--
 3 files changed, 124 insertions(+), 9 deletions(-)
 create mode 100644 OutlawEditor/src/main/java/org/badvision/outlaweditor/DragDropHelper.java

diff --git a/OutlawEditor/src/main/java/org/badvision/outlaweditor/ApplicationUIControllerImpl.java b/OutlawEditor/src/main/java/org/badvision/outlaweditor/ApplicationUIControllerImpl.java
index 919bd603..9e243e5d 100644
--- a/OutlawEditor/src/main/java/org/badvision/outlaweditor/ApplicationUIControllerImpl.java
+++ b/OutlawEditor/src/main/java/org/badvision/outlaweditor/ApplicationUIControllerImpl.java
@@ -16,7 +16,11 @@ import javafx.scene.control.TextField;
 import javafx.scene.control.cell.ComboBoxListCell;
 import javafx.scene.image.ImageView;
 import javafx.scene.image.WritableImage;
+import javafx.scene.input.ClipboardContent;
+import javafx.scene.input.DataFormat;
+import javafx.scene.input.Dragboard;
 import javafx.scene.input.MouseEvent;
+import javafx.scene.input.TransferMode;
 import javafx.util.Callback;
 import static org.badvision.outlaweditor.Application.currentPlatform;
 import static org.badvision.outlaweditor.Application.gameData;
@@ -833,6 +837,7 @@ public class ApplicationUIControllerImpl extends ApplicationUIController {
         return null;
     }
 
+    public static final DataFormat SCRIPT_DATA_FORMAT = new DataFormat("MythosScript");
     public void redrawMapScripts() {
         mapScriptsList.setOnEditStart(new EventHandler<ListView.EditEvent<Script>>() {
             @Override
@@ -840,10 +845,11 @@ public class ApplicationUIControllerImpl extends ApplicationUIController {
                   UIAction.editScript(event.getSource().getItems().get(event.getIndex()));
             }
         });
+        final DragDropHelper<Script> scriptDragDrop = new DragDropHelper<>(Script.class);
         mapScriptsList.setCellFactory(new Callback<ListView<Script>, ListCell<Script>>() {
             @Override
             public ListCell<Script> call(ListView<Script> param) {
-                return new ListCell<Script>() {
+                final ListCell<Script> cell = new ListCell<Script>() {
                     @Override
                     protected void updateItem(Script item, boolean empty) {
                         super.updateItem(item, empty);
@@ -851,9 +857,11 @@ public class ApplicationUIControllerImpl extends ApplicationUIController {
                             setText("");
                         } else {
                             setText(item.getName());
+                            scriptDragDrop.registerDragSupport(this, item);
                         }
                     }
                 };
+                return cell;
             }
         });
         if (currentMap == null) {
diff --git a/OutlawEditor/src/main/java/org/badvision/outlaweditor/DragDropHelper.java b/OutlawEditor/src/main/java/org/badvision/outlaweditor/DragDropHelper.java
new file mode 100644
index 00000000..a95325b3
--- /dev/null
+++ b/OutlawEditor/src/main/java/org/badvision/outlaweditor/DragDropHelper.java
@@ -0,0 +1,91 @@
+package org.badvision.outlaweditor;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Random;
+import javafx.event.EventHandler;
+import javafx.scene.Node;
+import javafx.scene.input.ClipboardContent;
+import javafx.scene.input.DataFormat;
+import javafx.scene.input.DragEvent;
+import javafx.scene.input.Dragboard;
+import javafx.scene.input.MouseEvent;
+import javafx.scene.input.TransferMode;
+
+/**
+ * Simplify management of drag/drop operations
+ *
+ * @author blurry
+ * @param <T> Type of object being passed
+ */
+public class DragDropHelper<T> {
+
+    Class type;
+    DataFormat format;
+    static Random random = new Random();
+    static Map<String, Object> registry = new HashMap<>();
+    static Map<String, DataFormat> dataFormats = new HashMap<>();
+
+    public interface DropEventHandler<T> {
+        public void handle(T object, double x, double y);
+    }
+
+    private DragDropHelper() {
+    }
+
+    public DragDropHelper(Class<T> clazz) {
+        type = clazz;
+        if (!dataFormats.containsKey(clazz.getName())) {
+            dataFormats.put(clazz.getName(), new DataFormat(clazz.getName()));
+        }
+        format = dataFormats.get(clazz.getName());
+    }
+
+    public void registerDragSupport(final Node source, final T object) {
+        final String id = type.getName() + "_" + random.nextInt(999999999);
+        source.setOnDragDetected(new EventHandler<MouseEvent>() {
+            @Override
+            public void handle(MouseEvent event) {
+                registry.put(id, object);
+                Dragboard db = source.startDragAndDrop(TransferMode.LINK);
+                ClipboardContent content = new ClipboardContent();
+                content.put(format, id);
+                db.setContent(content);
+                event.consume();
+            }
+        });
+        source.setOnDragDone(new EventHandler<DragEvent>() {
+            @Override
+            public void handle(DragEvent event) {
+                registry.remove(id);
+            }
+        });
+    }
+    public void registerDropSupport(final Node target, final DropEventHandler<T> handler) {
+        target.setOnDragOver(new EventHandler<DragEvent>() {
+            @Override
+            public void handle(DragEvent event) {
+                Dragboard db = event.getDragboard();
+                if (db.getContentTypes().contains(format)) {
+                    event.acceptTransferModes(TransferMode.LINK);
+                }
+                event.consume();
+            }
+        });
+        target.setOnDragDropped(new EventHandler<DragEvent>() {
+            @Override
+            public void handle(DragEvent event) {
+                Dragboard db = event.getDragboard();
+                if (db.getContentTypes().contains(format)) {
+                    event.setDropCompleted(true);
+                    String id = (String) db.getContent(format);
+                    T object = (T) registry.get(id);
+                    handler.handle(object, event.getX(), event.getY());
+                } else {
+                    event.setDropCompleted(false);
+                }
+                event.consume();
+            }
+        });
+    }
+}
diff --git a/OutlawEditor/src/main/java/org/badvision/outlaweditor/MapEditor.java b/OutlawEditor/src/main/java/org/badvision/outlaweditor/MapEditor.java
index a4449069..52e0f5a0 100644
--- a/OutlawEditor/src/main/java/org/badvision/outlaweditor/MapEditor.java
+++ b/OutlawEditor/src/main/java/org/badvision/outlaweditor/MapEditor.java
@@ -20,17 +20,22 @@ import javafx.scene.image.ImageView;
 import javafx.scene.image.WritableImage;
 import javafx.scene.input.Clipboard;
 import javafx.scene.input.DataFormat;
+import javafx.scene.input.DragEvent;
+import javafx.scene.input.Dragboard;
 import javafx.scene.input.MouseEvent;
 import javafx.scene.input.ScrollEvent;
+import javafx.scene.input.TransferMode;
 import javafx.scene.layout.AnchorPane;
 import javafx.scene.paint.Color;
 import javafx.scene.shape.Rectangle;
 import javafx.stage.Stage;
+import static org.badvision.outlaweditor.Application.currentPlatform;
+import org.badvision.outlaweditor.DragDropHelper.DropEventHandler;
 import org.badvision.outlaweditor.data.TileMap;
 import org.badvision.outlaweditor.data.TileUtils;
 import org.badvision.outlaweditor.data.xml.Map;
+import org.badvision.outlaweditor.data.xml.Script;
 import org.badvision.outlaweditor.data.xml.Tile;
-import static org.badvision.outlaweditor.Application.currentPlatform;
 
 /**
  *
@@ -48,6 +53,7 @@ public class MapEditor extends Editor<Map, MapEditor.DrawMode> implements EventH
     TileMap currentMap;
     double tileWidth = currentPlatform.tileRenderer.getWidth() * zoom;
     double tileHeight = currentPlatform.tileRenderer.getHeight() * zoom;
+    public static DragDropHelper<Script> scriptDragDrop = new DragDropHelper<>(Script.class);
 
     @Override
     public void setEntity(Map t) {
@@ -110,9 +116,19 @@ public class MapEditor extends Editor<Map, MapEditor.DrawMode> implements EventH
         drawCanvas.setOnMouseDragged(this);
         drawCanvas.setOnMouseDragReleased(this);
         drawCanvas.setOnMouseReleased(this);
+        scriptDragDrop.registerDropSupport(drawCanvas, new DropEventHandler<Script>() {
+            @Override
+            public void handle(Script script, double x, double y) {
+                assignScript(script, x, y);
+            }
+        });
         anchorPane.getChildren().add(0, drawCanvas);
     }
 
+    public void assignScript(Script script, double x, double y) {
+        System.out.println("Dropped " + script.getName() + " at " + x + "," + y);
+    }
+
     public void togglePanZoom() {
         for (Node n : anchorPane.getChildren()) {
             if (n == drawCanvas) {
@@ -270,20 +286,20 @@ public class MapEditor extends Editor<Map, MapEditor.DrawMode> implements EventH
     public void copy() {
         byte[] data = currentPlatform.imageRenderer.renderPreview(currentMap, posX, posY, currentPlatform.maxImageWidth, currentPlatform.maxImageHeight);
         WritableImage img = currentPlatform.imageRenderer.renderImage(null, data, currentPlatform.maxImageWidth, currentPlatform.maxImageHeight);
-        java.util.Map<DataFormat,Object> clip = new HashMap<>();
+        java.util.Map<DataFormat, Object> clip = new HashMap<>();
         clip.put(DataFormat.IMAGE, img);
-        clip.put(DataFormat.PLAIN_TEXT, "selection/map/"+Application.gameData.getMap().indexOf(getEntity())+"/"+getSelectionInfo());
-        Clipboard.getSystemClipboard().setContent(clip);        
+        clip.put(DataFormat.PLAIN_TEXT, "selection/map/" + Application.gameData.getMap().indexOf(getEntity()) + "/" + getSelectionInfo());
+        Clipboard.getSystemClipboard().setContent(clip);
     }
 
     @Override
     public String getSelectedAllInfo() {
-        setSelectionArea(posX, posY, posX+19, posY+11);
+        setSelectionArea(posX, posY, posX + 19, posY + 11);
         String result = getSelectionInfo();
-        setSelectionArea(0,0,0,0);
+        setSelectionArea(0, 0, 0, 0);
         return result;
     }
-    
+
     @Override
     public void paste() {
         throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
@@ -296,7 +312,7 @@ public class MapEditor extends Editor<Map, MapEditor.DrawMode> implements EventH
 
     @Override
     public void selectNone() {
-        setSelectionArea(0,0,0,0);
+        setSelectionArea(0, 0, 0, 0);
     }
 
     public static enum DrawMode {