From 48eb644d6963a1c3b96796706e9c5df1c58577d7 Mon Sep 17 00:00:00 2001
From: Matt Nash <Matt_Nash@raytheon.com>
Date: Fri, 30 Mar 2012 16:35:02 -0500
Subject: [PATCH] Issue #429 fix minor issues with toolbar and updated eraser
 code

Former-commit-id: 236ae6f26c702d2012d054042ed066e6dbb2d97e [formerly 27e850d203fc2553f1afd8f3c28d13d066ce6751 [formerly f6f3bcc2596735c8371256f4274c9b9e21445f1a]]
Former-commit-id: 27e850d203fc2553f1afd8f3c28d13d066ce6751
Former-commit-id: 25a539a1c8de660ae990b0564a0a38a41730b5d2
---
 cave/com.raytheon.uf.viz.drawing/plugin.xml   |  23 ++
 .../uf/viz/drawing/AbstractDrawingTool.java   |   1 -
 .../raytheon/uf/viz/drawing/DrawingLayer.java | 238 ++++++++++--------
 .../raytheon/uf/viz/drawing/PathToolbar.java  | 132 +++++++---
 .../uf/viz/drawing/tools/PathDrawingTool.java |  30 ++-
 5 files changed, 267 insertions(+), 157 deletions(-)

diff --git a/cave/com.raytheon.uf.viz.drawing/plugin.xml b/cave/com.raytheon.uf.viz.drawing/plugin.xml
index da4862783f..b91399067c 100644
--- a/cave/com.raytheon.uf.viz.drawing/plugin.xml
+++ b/cave/com.raytheon.uf.viz.drawing/plugin.xml
@@ -41,6 +41,29 @@
             class="com.raytheon.uf.viz.drawing.actions.RedoAddAction"
             commandId="com.raytheon.uf.viz.drawing.redoadd">
       </handler>
+   </extension>
+	<extension
+          point="org.eclipse.ui.contexts">
+           <context 
+                    description="Drawing Context"
+                    id="com.raytheon.uf.viz.drawing.context"
+                    name="Drawing Context">
+           </context>           
+   </extension>
+   <extension
+         point="org.eclipse.ui.bindings">
+      <key
+            commandId="com.raytheon.uf.viz.drawing.undoadd"
+            contextId="com.raytheon.uf.viz.drawing.context"
+            schemeId="com.raytheon.viz.ui.awips.scheme"
+            sequence="M1+Z">
+      </key>
+      <key
+            commandId="com.raytheon.uf.viz.drawing.redoadd"
+            contextId="com.raytheon.uf.viz.drawing.context"
+            schemeId="com.raytheon.viz.ui.awips.scheme"
+            sequence="M1+Y">
+      </key>
    </extension>
    <!--extension
          point="org.eclipse.ui.bindings">
diff --git a/cave/com.raytheon.uf.viz.drawing/src/com/raytheon/uf/viz/drawing/AbstractDrawingTool.java b/cave/com.raytheon.uf.viz.drawing/src/com/raytheon/uf/viz/drawing/AbstractDrawingTool.java
index 6a74450348..c8e70419f7 100644
--- a/cave/com.raytheon.uf.viz.drawing/src/com/raytheon/uf/viz/drawing/AbstractDrawingTool.java
+++ b/cave/com.raytheon.uf.viz.drawing/src/com/raytheon/uf/viz/drawing/AbstractDrawingTool.java
@@ -29,7 +29,6 @@ import com.raytheon.uf.viz.core.rsc.IInputHandler;
 import com.raytheon.uf.viz.core.rsc.LoadProperties;
 import com.raytheon.uf.viz.core.rsc.ResourceList;
 import com.raytheon.viz.ui.tools.AbstractModalTool;
-
 /**
  * Describes a basic drawing tool.
  * 
diff --git a/cave/com.raytheon.uf.viz.drawing/src/com/raytheon/uf/viz/drawing/DrawingLayer.java b/cave/com.raytheon.uf.viz.drawing/src/com/raytheon/uf/viz/drawing/DrawingLayer.java
index d022ced620..e2125a17d2 100644
--- a/cave/com.raytheon.uf.viz.drawing/src/com/raytheon/uf/viz/drawing/DrawingLayer.java
+++ b/cave/com.raytheon.uf.viz.drawing/src/com/raytheon/uf/viz/drawing/DrawingLayer.java
@@ -28,7 +28,6 @@ import java.util.Map;
 
 import org.eclipse.jface.action.Action;
 import org.eclipse.jface.action.IMenuManager;
-import org.eclipse.swt.graphics.RGB;
 
 import com.raytheon.uf.viz.core.IGraphicsTarget;
 import com.raytheon.uf.viz.core.drawables.IWireframeShape;
@@ -43,7 +42,9 @@ import com.raytheon.uf.viz.core.rsc.capabilities.ColorableCapability;
 import com.raytheon.uf.viz.core.rsc.capabilities.EditableCapability;
 import com.raytheon.uf.viz.core.rsc.capabilities.OutlineCapability;
 import com.raytheon.viz.ui.cmenu.IContextMenuContributor;
+import com.vividsolutions.jts.geom.Coordinate;
 import com.vividsolutions.jts.geom.Geometry;
+import com.vividsolutions.jts.geom.GeometryCollection;
 import com.vividsolutions.jts.geom.GeometryFactory;
 import com.vividsolutions.jts.geom.LineString;
 import com.vividsolutions.jts.geom.MultiLineString;
@@ -69,12 +70,17 @@ public class DrawingLayer extends
 
     protected IWireframeShape eraseWireframeShape;
 
+    // TODO take this out
+    private List<IWireframeShape> erasedShapes;
+
     protected IGraphicsTarget target;
 
-    protected boolean needsRefresh = true;
-
     protected boolean erase = false;
 
+    private PaintProperties paintProps = null;
+
+    private boolean needsRefresh = false;
+
     public DrawingLayer(PathDrawingResourceData data, LoadProperties props) {
         super(data, props);
     }
@@ -100,6 +106,8 @@ public class DrawingLayer extends
         this.tempGeometries = new ArrayList<Geometry>();
         this.wireframeShapes = new LinkedHashMap<Geometry, IWireframeShape>();
         this.deletedShapes = new LinkedHashMap<Geometry, IWireframeShape>();
+
+        this.erasedShapes = new ArrayList<IWireframeShape>();
         this.target = target;
 
         getCapability(OutlineCapability.class);
@@ -115,6 +123,7 @@ public class DrawingLayer extends
      */
     protected void paintInternal(IGraphicsTarget target,
             PaintProperties paintProps) throws VizException {
+        this.paintProps = paintProps;
         if (tempWireframeShape == null || needsRefresh) {
             tempWireframeShape = target.createWireframeShape(true,
                     getDescriptor());
@@ -125,47 +134,87 @@ public class DrawingLayer extends
                     getDescriptor());
         }
 
-        RGB rgb = getCapability(ColorableCapability.class).getColor();
-
         OutlineCapability outline = getCapability(OutlineCapability.class);
         ColorableCapability colorable = getCapability(ColorableCapability.class);
+
+        // remove after debugging
+        // MagnificationCapability magnification =
+        // getCapability(MagnificationCapability.class);
+        // for (Geometry ls : wireframeShapes.keySet()) {
+        // if (ls instanceof LineString) {
+        // LineString string = (LineString) ls;
+        // for (int i = 0; i < string.getNumPoints(); i++) {
+        // target.drawPoint(string.getPointN(i).getX(), string
+        // .getPointN(i).getY(), 0, colorable.getColor(),
+        // PointStyle.BOX, magnification.getMagnification()
+        // .floatValue());
+        // DrawableString dString = new DrawableString(string
+        // .getPointN(i).getCoordinate().toString(),
+        // colorable.getColor());
+        // dString.basics.x = string.getPointN(i).getX();
+        // dString.basics.y = string.getPointN(i).getY();
+        // target.drawStrings(dString);
+        // }
+        // }
+        // }
         for (IWireframeShape sh : wireframeShapes.values()) {
             target.drawWireframeShape(sh, colorable.getColor(),
-                    (float) outline.getOutlineWidth());
+                    (float) outline.getOutlineWidth(), outline.getLineStyle());
         }
 
         for (Geometry g : this.tempGeometries) {
-            drawTempLinePrimitive(g, target, rgb);
+            drawTempLinePrimitive(g, tempWireframeShape);
         }
+        // if (erase) {
+        // target.drawWireframeShape(tempWireframeShape, new RGB(255, 0, 0),
+        // 1.0f);
+        // } else {
         target.drawWireframeShape(tempWireframeShape, colorable.getColor(),
                 outline.getOutlineWidth(), outline.getLineStyle());
-
-        // target.drawWireframeShape(eraseWireframeShape, new RGB(255, 0, 0),
-        // 4.0f);
+        // }
     }
 
-    private void drawTempLinePrimitive(Geometry shape, IGraphicsTarget target,
-            RGB color) throws VizException {
+    private void drawTempLinePrimitive(Geometry shape, IWireframeShape wShape) {
         LineString line = (LineString) shape;
 
         int pts = line.getNumPoints();
+
         for (int i = 1; i < pts; i++) {
-            double[] p1 = this.descriptor
-                    .worldToPixel(new double[] { line.getPointN(i - 1).getX(),
-                            line.getPointN(i - 1).getY() });
-            double[] p2 = this.descriptor.worldToPixel(new double[] {
-                    line.getPointN(i).getX(), line.getPointN(i).getY() });
+            double[] p1 = new double[] { line.getPointN(i - 1).getX(),
+                    line.getPointN(i - 1).getY() };
+            double[] p2 = new double[] { line.getPointN(i).getX(),
+                    line.getPointN(i).getY() };
             double[][] coords = new double[2][2];
             coords[0][0] = p1[0];
             coords[0][1] = p1[1];
             coords[1][0] = p2[0];
             coords[1][1] = p2[1];
-            tempWireframeShape.addLineSegment(coords);
+            wShape.addLineSegment(coords);
         }
     }
 
     /**
-     * Draw a line using pixel coordinates
+     * Convert from world to gl pixels
+     * 
+     * @param line
+     * @param i
+     * @return
+     */
+    public LineString convertPixels(LineString line) {
+        int pts = line.getNumPoints();
+        GeometryFactory factory = new GeometryFactory();
+        List<Coordinate> coords = new ArrayList<Coordinate>();
+        for (int i = 0; i < pts; i++) {
+            double[] point = this.descriptor.worldToPixel(new double[] {
+                    line.getPointN(i).getX(), line.getPointN(i).getY() });
+            coords.add(new Coordinate(point[0], point[1]));
+        }
+        return factory.createLineString(coords.toArray(new Coordinate[0]));
+    }
+
+    /**
+     * Finalize a temporary line by putting it in the map of all the drawn
+     * shapes
      * 
      * UUID is optional, and generally should be null
      * 
@@ -173,74 +222,68 @@ public class DrawingLayer extends
      * @param isFinal
      * @param uuid
      */
-    public void addLine(LineString line, String uuid) {
+    public void finalizeLine(LineString line, String uuid) {
         tempWireframeShape.compile();
         wireframeShapes.put(line, tempWireframeShape);
     }
 
-    public void addTempLine(LineString line) {
-        if (!erase) {
-            this.tempGeometries.add(line);
-        } else {
-            Map<Geometry, IWireframeShape> shapes = new HashMap<Geometry, IWireframeShape>();
-            shapes.putAll(wireframeShapes);
-            GeometryFactory factory = new GeometryFactory();
-            for (Geometry geom : shapes.keySet()) {
-                if (line.intersects(geom)) {
-                    Point point = factory
-                            .createPoint(line.getCoordinates()[line
-                                    .getNumPoints() - 1]);
-                    Geometry intersection = point.buffer(1).intersection(geom);
-                    Geometry finalGeom = geom.difference(intersection);
-                    deletedShapes.put(geom, wireframeShapes.remove(geom));
+    public void addTempDrawLine(LineString line) {
+        this.tempGeometries.add(line);
+    }
 
-                    if (finalGeom instanceof MultiLineString) {
-                        MultiLineString mLineString = (MultiLineString) finalGeom;
-                        for (int j = 0; j < mLineString.getNumGeometries(); j++) {
-                            LineString lineString = (LineString) mLineString
-                                    .getGeometryN(j);
-                            eraseWireframeShape = target.createWireframeShape(
-                                    true, descriptor);
-                            int pts = lineString.getNumPoints();
-                            for (int i = 1; i < pts; i++) {
-                                double[] p1 = this.descriptor
-                                        .worldToPixel(new double[] {
-                                                lineString.getPointN(i - 1)
-                                                        .getX(),
-                                                lineString.getPointN(i - 1)
-                                                        .getY() });
-                                double[] p2 = this.descriptor
-                                        .worldToPixel(new double[] {
-                                                lineString.getPointN(i).getX(),
-                                                lineString.getPointN(i).getY() });
-                                double[][] coords = new double[2][2];
-                                coords[0][0] = p1[0];
-                                coords[0][1] = p1[1];
-                                coords[1][0] = p2[0];
-                                coords[1][1] = p2[1];
-                                eraseWireframeShape.addLineSegment(coords);
-                                // try {
-                                // target.drawPoint(coords[0][0],
-                                // coords[0][1], 0,
-                                // new RGB(0, 0, 255),
-                                // PointStyle.CIRCLE);
-                                // } catch (VizException e) {
-                                // e.printStackTrace();
-                                // }
-                            }
-                            this.wireframeShapes.put(lineString,
-                                    eraseWireframeShape);
-                            // try {
-                            // target.drawWireframeShape(eraseWireframeShape,
-                            // new RGB(0, 0, 255), 10.0f);
-                            // } catch (VizException e) {
-                            // e.printStackTrace();
-                            // }
-                            issueRefresh();
-                        }
+    public void addTempEraseLine(LineString line) {
+        this.tempGeometries.add(line);
+        Map<Geometry, IWireframeShape> shapes = new HashMap<Geometry, IWireframeShape>();
+        shapes.putAll(wireframeShapes);
+        for (Geometry geom : shapes.keySet()) {
+            double extentPercentageX = paintProps.getView().getExtent()
+                    .getWidth()
+                    / (double) paintProps.getCanvasBounds().width;
+            double cursorSize = 16;
+            double size = extentPercentageX * cursorSize;
+            if (line.buffer(size / 2).intersects(geom)) {
+                Geometry intersection = line.buffer(size / 2)
+                        .intersection(geom);
+                Geometry finalGeom = geom.difference(intersection);
+                deletedShapes.put(geom, wireframeShapes.remove(geom));
+
+                Geometry lString = null;
+                // should be split into multiple pieces (half or more)
+                if (finalGeom instanceof MultiLineString) {
+                    lString = (MultiLineString) finalGeom;
+                    for (int j = 0; j < lString.getNumGeometries(); j++) {
+                        LineString lineString = (LineString) lString
+                                .getGeometryN(j);
+                        eraseWireframeShape = target.createWireframeShape(true,
+                                descriptor);
+                        drawTempLinePrimitive(lineString, eraseWireframeShape);
+                        this.wireframeShapes.put(lineString,
+                                eraseWireframeShape);
+                        erasedShapes.add(eraseWireframeShape);
                     }
                 }
+                if (finalGeom instanceof LineString) {
+                    GeometryFactory factory = new GeometryFactory();
+                    lString = (LineString) finalGeom;
+                    Point point = factory
+                            .createPoint(lString.getCoordinates()[0]);
+                    intersection = point.buffer(size / 2).intersection(geom);
+                    finalGeom = geom.difference(intersection);
+                    eraseWireframeShape = target.createWireframeShape(true,
+                            descriptor);
+                    drawTempLinePrimitive(lString, eraseWireframeShape);
+                    this.wireframeShapes.put(lString, eraseWireframeShape);
+                    erasedShapes.add(eraseWireframeShape);
+                } else {
+                    lString = (GeometryCollection) finalGeom;
+                    // for (int j = 0; j < lString.getNumGeometries(); j++) {
+                    // System.out.println(lString.getGeometryN(j).getClass());
+                    // }
+                    // System.out.println(finalGeom.getClass() + " has "
+                    // + lString.getNumGeometries() + " geometries");
+                }
             }
+            tempGeometries.clear();
         }
     }
 
@@ -251,6 +294,7 @@ public class DrawingLayer extends
     }
 
     public void resetTemp() {
+        // this.tempWireframeShape.dispose();
         this.tempGeometries.clear();
         needsRefresh = true;
     }
@@ -268,12 +312,16 @@ public class DrawingLayer extends
         for (IWireframeShape shape : this.deletedShapes.values()) {
             shape.dispose();
         }
-
+        this.tempWireframeShape.dispose();
         this.eraseWireframeShape.dispose();
+
         this.wireframeShapes.clear();
         this.deletedShapes.clear();
     }
 
+    /**
+     * Remove the last drawn shape
+     */
     public void undoAdd() {
         if (!this.wireframeShapes.isEmpty()) {
             Geometry geom = this.wireframeShapes.keySet().toArray(
@@ -284,7 +332,7 @@ public class DrawingLayer extends
     }
 
     /**
-     * Add the ability to remove and redo
+     * Redraw the last deleted shape
      */
     public void redoAdd() {
         if (!deletedShapes.isEmpty()) {
@@ -296,40 +344,18 @@ public class DrawingLayer extends
     }
 
     /**
-     * @return the wireframeShapes
-     */
-    public IWireframeShape getTempWireframeShape() {
-        return tempWireframeShape;
-    }
-
-    /*
-     * (non-Javadoc)
-     * 
-     * @see
-     * com.raytheon.viz.ui.cmenu.IContextMenuContributor#addContextMenuItems
-     * (org.eclipse.jface.action.IMenuManager, int, int)
+     * Add items to the right click menu, in this case just a button to launch
+     * the Drawing toolbar
      */
     @Override
     public void addContextMenuItems(IMenuManager menuManager, int x, int y) {
         ResourcePair pair = new ResourcePair();
         pair.setResource(this);
-        Action action = new Action("Draw Toolbar") {
+        Action action = new Action("Draw Toolbar...") {
             public void run() {
                 PathToolbar.getToolbar().open();
             };
         };
-        // ClearDrawingAction cAction = new ClearDrawingAction();
-        // cAction.setSelectedRsc(pair);
-        // cAction.setImageDescriptor(ToolsUtils.getImageDescriptor("remove.gif"));
-        // UndoAddAction uAction = new UndoAddAction();
-        // uAction.setSelectedRsc(pair);
-        // uAction.setImageDescriptor(ToolsUtils.getImageDescriptor("undo.gif"));
-        // RedoAddAction rAction = new RedoAddAction();
-        // rAction.setSelectedRsc(pair);
-        // rAction.setImageDescriptor(ToolsUtils.getImageDescriptor("redo.gif"));
-        // menuManager.add(cAction);
-        // menuManager.add(uAction);
-        // menuManager.add(rAction);
         menuManager.add(action);
     }
 
diff --git a/cave/com.raytheon.uf.viz.drawing/src/com/raytheon/uf/viz/drawing/PathToolbar.java b/cave/com.raytheon.uf.viz.drawing/src/com/raytheon/uf/viz/drawing/PathToolbar.java
index cc56f09fc1..9e1510fa02 100644
--- a/cave/com.raytheon.uf.viz.drawing/src/com/raytheon/uf/viz/drawing/PathToolbar.java
+++ b/cave/com.raytheon.uf.viz.drawing/src/com/raytheon/uf/viz/drawing/PathToolbar.java
@@ -19,14 +19,13 @@
  **/
 package com.raytheon.uf.viz.drawing;
 
-import java.util.HashMap;
-import java.util.Map;
-
 import org.eclipse.core.commands.AbstractHandler;
 import org.eclipse.core.commands.ExecutionException;
 import org.eclipse.swt.SWT;
 import org.eclipse.swt.events.SelectionAdapter;
 import org.eclipse.swt.events.SelectionEvent;
+import org.eclipse.swt.events.ShellAdapter;
+import org.eclipse.swt.events.ShellEvent;
 import org.eclipse.swt.layout.GridData;
 import org.eclipse.swt.layout.GridLayout;
 import org.eclipse.swt.widgets.Composite;
@@ -34,11 +33,15 @@ import org.eclipse.swt.widgets.Display;
 import org.eclipse.swt.widgets.Shell;
 import org.eclipse.swt.widgets.ToolBar;
 import org.eclipse.swt.widgets.ToolItem;
+import org.eclipse.ui.PlatformUI;
+import org.eclipse.ui.contexts.IContextActivation;
+import org.eclipse.ui.contexts.IContextService;
 
 import com.raytheon.uf.viz.core.IDisplayPane;
 import com.raytheon.uf.viz.core.drawables.IDescriptor;
 import com.raytheon.uf.viz.core.drawables.ResourcePair;
 import com.raytheon.uf.viz.core.icon.IconUtil;
+import com.raytheon.uf.viz.core.rsc.ResourceList;
 import com.raytheon.uf.viz.drawing.actions.ClearDrawingAction;
 import com.raytheon.uf.viz.drawing.actions.EraseObjectsAction;
 import com.raytheon.uf.viz.drawing.actions.RedoAddAction;
@@ -72,15 +75,23 @@ public class PathToolbar extends CaveSWTDialog implements
 
     private static PathToolbar toolbar;
 
-    private Map<AbstractEditor, ResourcePair> layers;
+    // private Map<AbstractEditor, ResourcePair> layers;
 
     private ToolItem drawItem;
 
     private ToolItem eraserItem;
 
+    private ToolItem undoItem;
+
+    private ToolItem redoItem;
+
+    private ToolItem clearItem;
+
+    private IContextActivation drawingContext;
+
     public static PathToolbar getToolbar() {
         if (toolbar == null) {
-            toolbar = new PathToolbar(Display.getCurrent().getActiveShell());
+            toolbar = new PathToolbar(new Shell(Display.getCurrent()));
         }
         return toolbar;
     }
@@ -91,7 +102,6 @@ public class PathToolbar extends CaveSWTDialog implements
      */
     protected PathToolbar(Shell parentShell) {
         super(parentShell, SWT.DIALOG_TRIM | CAVE.DO_NOT_BLOCK);
-        layers = new HashMap<AbstractEditor, ResourcePair>();
         setText("Drawing");
     }
 
@@ -112,6 +122,18 @@ public class PathToolbar extends CaveSWTDialog implements
      */
     @Override
     protected void initializeComponents(Shell shell) {
+        shell.addShellListener(new ShellAdapter() {
+            @Override
+            public void shellClosed(ShellEvent e) {
+                PathToolbar.getToolbar().getShell().removeShellListener(this);
+
+                IContextService contextService = (IContextService) PlatformUI
+                        .getWorkbench().getService(IContextService.class);
+                contextService.deactivateContext(drawingContext);
+                super.shellClosed(e);
+            }
+        });
+
         Composite comp = new Composite(shell, SWT.NONE);
         GridLayout layout = new GridLayout();
         comp.setLayout(layout);
@@ -141,10 +163,9 @@ public class PathToolbar extends CaveSWTDialog implements
                         .getActiveEditorAs(AbstractEditor.class);
                 IDescriptor desc = editor.getActiveDisplayPane()
                         .getDescriptor();
-                if (layers.containsKey(editor)) {
-                    if (((DrawingLayer) layers.get(editor).getResource()).erase) {
-                        ((DrawingLayer) layers.get(editor).getResource())
-                                .setErase(false);
+                for (ResourcePair pair : desc.getResourceList()) {
+                    if (pair.getResource() instanceof DrawingLayer) {
+                        ((DrawingLayer) pair.getResource()).erase = false;
                         eraserItem.setSelection(false);
                     }
                 }
@@ -153,49 +174,39 @@ public class PathToolbar extends CaveSWTDialog implements
                 // ((VizMultiPaneEditor) editor)
                 // .addSelectedPaneChangedListener(PathToolbar
                 // .getToolbar());
-                for (ResourcePair pair : desc.getResourceList()) {
-                    if (pair.getResource() instanceof DrawingLayer) {
-                        layers.put(editor, pair);
-                        eraserItem.setEnabled(true);
-                        // drawItem.setEnabled(false);
-                    }
-                }
+                updateToolbar();
             }
         });
 
-        ToolItem undoItem = new ToolItem(toolbar, SWT.FLAT);
+        undoItem = new ToolItem(toolbar, SWT.FLAT);
         undoItem.setText("Undo");
         undoItem.setImage(IconUtil.getImageDescriptor(
                 Activator.getDefault().getBundle(), "undo.gif").createImage());
+        undoItem.setToolTipText("Ctrl+Z to Undo");
         undoItem.addSelectionListener(new SelectionAdapter() {
             @Override
             public void widgetSelected(SelectionEvent e) {
                 UndoAddAction action = new UndoAddAction();
-                AbstractEditor editor = EditorUtil
-                        .getActiveEditorAs(AbstractEditor.class);
-                if (layers.get(editor) != null) {
-                    executeAction(action);
-                }
+                executeAction(action);
+                updateToolbar();
             }
         });
 
-        ToolItem redoItem = new ToolItem(toolbar, SWT.FLAT);
+        redoItem = new ToolItem(toolbar, SWT.FLAT);
         redoItem.setText("Redo");
         redoItem.setImage(IconUtil.getImageDescriptor(
                 Activator.getDefault().getBundle(), "redo.gif").createImage());
+        redoItem.setToolTipText("Ctrl+Y to Redo");
         redoItem.addSelectionListener(new SelectionAdapter() {
             @Override
             public void widgetSelected(SelectionEvent e) {
                 RedoAddAction action = new RedoAddAction();
-                AbstractEditor editor = EditorUtil
-                        .getActiveEditorAs(AbstractEditor.class);
-                if (layers.get(editor) != null) {
-                    executeAction(action);
-                }
+                executeAction(action);
+                updateToolbar();
             }
         });
 
-        ToolItem clearItem = new ToolItem(toolbar, SWT.FLAT);
+        clearItem = new ToolItem(toolbar, SWT.FLAT);
         clearItem.setText("Clear");
         clearItem
                 .setImage(IconUtil.getImageDescriptor(
@@ -205,11 +216,8 @@ public class PathToolbar extends CaveSWTDialog implements
             @Override
             public void widgetSelected(SelectionEvent e) {
                 ClearDrawingAction action = new ClearDrawingAction();
-                AbstractEditor editor = EditorUtil
-                        .getActiveEditorAs(AbstractEditor.class);
-                if (layers.get(editor) != null) {
-                    executeAction(action);
-                }
+                executeAction(action);
+                updateToolbar();
             }
         });
 
@@ -219,18 +227,23 @@ public class PathToolbar extends CaveSWTDialog implements
                 .setImage(IconUtil.getImageDescriptor(
                         Activator.getDefault().getBundle(), "eraser.png")
                         .createImage());
-        eraserItem.setEnabled(false);
         eraserItem.addSelectionListener(new SelectionAdapter() {
             @Override
             public void widgetSelected(SelectionEvent e) {
                 EraseObjectsAction action = new EraseObjectsAction();
-                AbstractEditor editor = EditorUtil
-                        .getActiveEditorAs(AbstractEditor.class);
-                if (layers.get(editor) != null) {
-                    executeAction(action);
-                }
+                executeAction(action);
             }
         });
+        updateToolbar();
+    }
+
+    @Override
+    protected void opened() {
+        IContextService contextService = (IContextService) PlatformUI
+                .getWorkbench().getService(IContextService.class);
+        drawingContext = contextService
+                .activateContext("com.raytheon.uf.viz.drawing.context");
+        super.opened();
     }
 
     private void executeAction(AbstractHandler action) {
@@ -262,4 +275,41 @@ public class PathToolbar extends CaveSWTDialog implements
         }
     }
 
+    private void updateToolbar() {
+        if (true) {
+            return;
+        }
+        AbstractEditor editor = EditorUtil
+                .getActiveEditorAs(AbstractEditor.class);
+        ResourceList list = editor.getActiveDisplayPane().getDescriptor()
+                .getResourceList();
+        for (ResourcePair pair : list) {
+            if (pair.getResource() instanceof DrawingLayer) {
+                DrawingLayer layer = (DrawingLayer) pair.getResource();
+                if (layer.getDeletedShapes().isEmpty()
+                        && layer.getWireframeShapes().isEmpty()) {
+                    undoItem.setEnabled(false);
+                    redoItem.setEnabled(false);
+                    clearItem.setEnabled(false);
+                } else {
+                    clearItem.setEnabled(true);
+                    if (layer.getDeletedShapes().isEmpty()) {
+                        undoItem.setEnabled(true);
+                        redoItem.setEnabled(false);
+                    } else {
+                        undoItem.setEnabled(false);
+                        redoItem.setEnabled(true);
+                    }
+                    if (layer.getWireframeShapes().isEmpty()) {
+                        redoItem.setEnabled(true);
+                        undoItem.setEnabled(false);
+                    } else {
+                        redoItem.setEnabled(false);
+                        undoItem.setEnabled(true);
+                    }
+                }
+            }
+        }
+    }
+
 }
diff --git a/cave/com.raytheon.uf.viz.drawing/src/com/raytheon/uf/viz/drawing/tools/PathDrawingTool.java b/cave/com.raytheon.uf.viz.drawing/src/com/raytheon/uf/viz/drawing/tools/PathDrawingTool.java
index 38379f305d..ac85bfdf89 100644
--- a/cave/com.raytheon.uf.viz.drawing/src/com/raytheon/uf/viz/drawing/tools/PathDrawingTool.java
+++ b/cave/com.raytheon.uf.viz.drawing/src/com/raytheon/uf/viz/drawing/tools/PathDrawingTool.java
@@ -31,6 +31,7 @@ import org.eclipse.swt.widgets.Display;
 import com.raytheon.uf.viz.core.icon.IconUtil;
 import com.raytheon.uf.viz.core.rsc.AbstractResourceData;
 import com.raytheon.uf.viz.core.rsc.IInputHandler;
+import com.raytheon.uf.viz.core.rsc.capabilities.EditableCapability;
 import com.raytheon.uf.viz.drawing.AbstractDrawingTool;
 import com.raytheon.uf.viz.drawing.Activator;
 import com.raytheon.uf.viz.drawing.PathDrawingResourceData;
@@ -83,7 +84,9 @@ public class PathDrawingTool extends AbstractDrawingTool {
          */
         @Override
         public boolean handleMouseDown(int anX, int aY, int button) {
-            if (button != 1)
+            if (button != 1
+                    || !theDrawingLayer.getCapability(EditableCapability.class)
+                            .isEditable())
                 return false;
 
             Cursor cursor = null;
@@ -120,7 +123,9 @@ public class PathDrawingTool extends AbstractDrawingTool {
          */
         @Override
         public boolean handleMouseDownMove(int x, int y, int button) {
-            if (button != 1)
+            if (button != 1
+                    || !theDrawingLayer.getCapability(EditableCapability.class)
+                            .isEditable())
                 return false;
             Coordinate p1 = editor.translateClick(theLastMouseX, theLastMouseY);
             Coordinate p2 = editor.translateClick(x, y);
@@ -133,8 +138,12 @@ public class PathDrawingTool extends AbstractDrawingTool {
             GeometryFactory gf = new GeometryFactory();
             LineString ls = gf.createLineString(new Coordinate[] { p1, p2 });
 
-            theDrawingLayer.addTempLine(ls);
-
+            ls = theDrawingLayer.convertPixels(ls);
+            if (theDrawingLayer.isErase()) {
+                theDrawingLayer.addTempEraseLine(ls);
+            } else {
+                theDrawingLayer.addTempDrawLine(ls);
+            }
             theLastMouseX = x;
             theLastMouseY = y;
             editor.refresh();
@@ -149,25 +158,28 @@ public class PathDrawingTool extends AbstractDrawingTool {
          */
         @Override
         public boolean handleMouseUp(int anX, int aY, int button) {
+            if (button != 1
+                    || !theDrawingLayer.getCapability(EditableCapability.class)
+                            .isEditable()) {
+                return false;
+            }
             // change the cursor back on up
             Cursor cursor = new Cursor(Display.getCurrent(), SWT.CURSOR_ARROW);
             Display.getCurrent().getActiveShell().setCursor(cursor);
             cursor.dispose();
 
-            if (button != 1) {
-                return false;
-            }
-
             theDrawingLayer.resetTemp();
             Coordinate[] coords = (Coordinate[]) pathList
                     .toArray(new Coordinate[pathList.size()]);
             GeometryFactory gf = new GeometryFactory();
             if (coords.length > 1) {
                 LineString ls = gf.createLineString(coords);
+                ls = theDrawingLayer.convertPixels(ls);
                 if (!theDrawingLayer.isErase()) {
-                    theDrawingLayer.addLine(ls, null);
+                    theDrawingLayer.finalizeLine(ls, null);
                 }
             }
+            editor.refresh();
             return true;
         }
     }