a fixes for redraw calls in plotly_selecting handlers

Author: etpinard

src/plots/cartesian/dragbox.js

@@ -226,6 +226,8 @@ function makeDragBox(gd, plotinfo, x, y, w, h, ns, ew) {
                     updateSubplots([0, 0, pw, ph]);
                     dragOptions.moveFn(dragDataNow.dx, dragDataNow.dy);
                 }
+
+                // TODO should we try to "re-select" under select/lasso modes?
             }
         };
     };

src/plots/cartesian/select.js

@@ -20,6 +20,7 @@ var throttle = require('../../lib/throttle');
 var makeEventData = require('../../components/fx/helpers').makeEventData;
 var getFromId = require('./axis_ids').getFromId;
 var clearGlCanvases = require('../../lib/clear_gl_canvases');
+
 var redrawReglTraces = require('../../plot_api/subroutines').redrawReglTraces;
 
 var constants = require('./constants');
@@ -669,7 +670,7 @@ function updateSelectedState(gd, searchTraces, eventData) {
     // before anything else, update preGUI if necessary
     for(i = 0; i < searchTraces.length; i++) {
         var fullInputTrace = searchTraces[i].cd[0].trace._fullInput;
-        var tracePreGUI = gd._fullLayout._tracePreGUI[fullInputTrace.uid];
+        var tracePreGUI = gd._fullLayout._tracePreGUI[fullInputTrace.uid] || {};
         if(tracePreGUI.selectedpoints === undefined) {
             tracePreGUI.selectedpoints = fullInputTrace._input.selectedpoints || null;
         }

src/plots/plots.js

@@ -19,7 +19,7 @@ var Lib = require('../lib');
 var Color = require('../components/color');
 var BADNUM = require('../constants/numerical').BADNUM;
 
-var axisIDs = require('../plots/cartesian/axis_ids');
+var axisIDs = require('./cartesian/axis_ids');
 
 var animationAttrs = require('./animation_attributes');
 var frameAttrs = require('./frame_attributes');
@@ -476,6 +476,15 @@ plots.supplyDefaults = function(gd, opts) {
     // clean subplots and other artifacts from previous plot calls
     plots.cleanPlot(newFullData, newFullLayout, oldFullData, oldFullLayout);
 
+    // clear selection outline until we implement persistent selection,
+    // don't clear them though when drag handlers (e.g. listening to
+    // `plotly_selecting`) update the graph.
+    // we should try to come up with a better solution when implementing
+    // https://github.com/plotly/plotly.js/issues/1851
+    if(oldFullLayout._zoomlayer && !gd._dragging) {
+        oldFullLayout._zoomlayer.selectAll('.select-outline').remove();
+    }
+
     // relink functions and _ attributes to promote consistency between plots
     relinkPrivateKeys(newFullLayout, oldFullLayout);
 
@@ -779,10 +788,6 @@ plots.cleanPlot = function(newFullData, newFullLayout, oldFullData, oldFullLayou
             oldFullLayout._infolayer.select('.cb' + oldUid).remove();
         }
     }
-
-    if(oldFullLayout._zoomlayer) {
-        oldFullLayout._zoomlayer.selectAll('.select-outline').remove();
-    }
 };
 
 plots.linkSubplots = function(newFullData, newFullLayout, oldFullData, oldFullLayout) {