set default angle to auto for all shapes

Author: emilykl

src/components/shapes/attributes.js

@@ -258,6 +258,7 @@ module.exports = templatedArray('shape', {
         },
         textangle: {
             valType: 'angle',
+            dflt: 'auto',
             editType: 'calc+arraydraw',
             description: [
                 'Sets the angle at which the label text is drawn',

src/components/shapes/defaults.js

@@ -137,7 +137,7 @@ function handleShapeDefaults(shapeIn, shapeOut, fullLayout) {
     var isLine = shapeType === 'line';
     var labelText = coerce('label.text');
     if(labelText) {
-        coerce('label.textangle', isLine ? 'auto' : 0);
+        coerce('label.textangle');
         var labelTextPosition = coerce('label.textposition', isLine ? 'middle' : 'middle center');
         coerce('label.xanchor');
         coerce('label.yanchor', dfltLabelYanchor(isLine, labelTextPosition));

src/components/shapes/draw.js

@@ -674,8 +674,6 @@ function drawLabel(gd, index, options, shapeGroup) {
             textangle = calcTextAngle(shapex0, shapey0, shapex1, shapey1);
         } else {
             // Auto angle for all other shapes is 0
-            // The default angle for other shapes is 0 anyway, so there's no reason to
-            // explicitly set the angle to `auto`, this is just covering an edge case
             textangle = 0;
         }
     }

src/components/shapes/draw_newshape/attributes.js

@@ -111,12 +111,13 @@ module.exports = {
             },
             textangle: {
                 valType: 'angle',
+                dflt: 'auto',
                 editType: 'none',
                 description: [
                     'Sets the angle at which the label text is drawn',
-                    'with respect to the horizontal. For lines, the default textangle is `auto`,',
-                    'which displays the text at the same angle as the line. For all other shapes,',
-                    'the default textangle is 0 (horizontal).'
+                    'with respect to the horizontal. For lines, angle `auto`',
+                    'is the same angle as the line. For all other shapes,',
+                    'angle `auto` is horizontal.'
                 ].join(' ')
             },
             xanchor: {

src/components/shapes/draw_newshape/defaults.js

@@ -36,7 +36,7 @@ module.exports = function supplyDrawNewShapeDefaults(layoutIn, layoutOut, coerce
     var isLine = layoutIn.dragmode === 'drawline';
     var labelText = coerce('newshape.label.text');
     if(labelText) {
-        coerce('newshape.label.textangle', isLine ? 'auto' : 0);
+        coerce('newshape.label.textangle');
         var labelTextPosition = coerce('newshape.label.textposition', isLine ? 'middle' : 'middle center');
         coerce('newshape.label.xanchor');
         coerce('newshape.label.yanchor', dfltLabelYanchor(isLine, labelTextPosition));