make first part of slicing cancellable

js/kiri-driver-fdm.js

@@ -71,7 +71,7 @@ var gs_kiri_fdm = exports;
         }, onSliceDone, onSliceUpdate);
 
         function onSliceUpdate(update) {
-            onupdate(0.0 + update * 0.5);
+            return onupdate(0.0 + update * 0.5);
         }
 
         function onSliceDone(slices) {

js/kiri-slicer.js

@@ -257,9 +257,10 @@ var gs_kiri_slicer = exports;
             }
         }
 
+/* -- synchronous slice -- can't be cancelled --
         // create a Slice for each z offset in the zIndexes array
         for (var i = 0; i < zIndexes.length; i++) {
-            // mark the slice height
+            // slice next layer and add to slices[] array
             sliceZ(zIndexes[i], zHeights[i]);
             // kill slicing if onupdate() returns 42
             if (onupdate(i / zIndexes.length) === 42) {
@@ -283,6 +284,39 @@ var gs_kiri_slicer = exports;
 
         // pass Slices array back to ondone function
         ondone(slices);
+*/
+
+        var sliceIndex = 0;
+
+        function kickSlice() {
+            sliceZ(zIndexes[sliceIndex], zHeights[sliceIndex]);
+            // kill slicing if onupdate() returns 42
+            if (onupdate(sliceIndex / zIndexes.length) === 42) {
+                return ondone(null);
+            }
+            if (++sliceIndex < zIndexes.length) {
+                setTimeout(kickSlice, 0);
+            } else {
+                // for cam, mark top and bottom as mandatory (hasFlats)
+                if (options.cam && slices.length > 0) {
+                    slices[0].hasFlats = true;
+                    slices[slices.length-1].hasFlats = true;
+                }
+
+                // connect slices into linked list for island/bridge projections
+                for (i=1; i<slices.length; i++) {
+                    slices[i-1].up = slices[i];
+                    slices[i].down = slices[i-1];
+                }
+
+                slices.slice_time = time() - timeStart;
+
+                // pass Slices array back to ondone function
+                ondone(slices);
+            }
+        }
+
+        kickSlice();
 
         /** ***** SLICING FUNCTIONS ***** */
 

js/kiri-widget.js

@@ -577,7 +577,12 @@ var gs_kiri_widget = exports;
 
             var catchupdate = function(progress, message) {
                 onupdate(progress, message);
-                return widget.cancel ? 42 : 0;
+                if (widget.cancel) {
+                    ondone("canceled");
+                    return 42;
+                } else {
+                    return 0;
+                }
             };
 
             var driver = null;

js/kiri-work.js

@@ -165,13 +165,14 @@ if (self.window) {
         },
 
         cancel: function(data) {
-            // console.log({work_cancel: data});
             if (data.id) {
                 var widget = cache[data.id];
                 if (widget) widget.cancel = true;
             } else {
                 for (var id in cache) {
-                    if (cache.hasOwnProperty(id)) cache[id].cancel = true;
+                    if (cache.hasOwnProperty(id)) {
+                        cache[id].cancel = true;
+                    }
                 }
             }
         },
@@ -188,8 +189,8 @@ if (self.window) {
                 last = util.time(),
                 now;
 
-            // clear previous widget data before reslice
-            delete cache[data.id];
+            // do it here so cancel can work
+            cache[data.id] = widget;
 
             // fake mesh object to satisfy printing
             widget.mesh = {
@@ -199,6 +200,7 @@ if (self.window) {
 
             widget.slice(settings, function(error) {
                 if (error) {
+                    delete cache[data.id];
                     send.data({error: error});
                 } else {
                     var slices = widget.slices || [];
@@ -215,7 +217,7 @@ if (self.window) {
                 }
                 send.done({done: true});
                 // cache results for future printing
-                cache[data.id] = widget;
+                // cache[data.id] = widget;
             }, function(update, msg) {
                 now = util.time();
                 if (now - last < 10 && update < 0.99) return;

js/license.js

@@ -1,7 +1,7 @@
 var exports = {
     COPYRIGHT:"Copyright (C) 2014-2017 Stewart Allen <stewart@neuron.com> - All Rights Reserved",
     LICENSE:"Unauthorized copying, modification and re-distribution are strictly prohibited without prior written consent.",
-    VERSION:"1.1.8c"
+    VERSION:"1.1.9"
 };
 if (!module) var module = {};
 module.exports = exports;