Expose minreducedwidth and minreducedheight to API

draftlogs/6307_add.md

@@ -0,0 +1 @@
+Add `minreducedwidth` and `minreducedheight` as layout parameters [[#6307](https://github.com/plotly/plotly.js/pull/6307)]

src/plots/layout_attributes.js

@@ -189,6 +189,20 @@ module.exports = {
             'Sets the plot\'s height (in px).'
         ].join(' ')
     },
+    minreducedwidth: {
+        valType: 'number',
+        min: 2,
+        dflt: 64,
+        editType: 'plot',
+        description: 'Minimum width of the plot with margin.automargin applied (in px)'
+    },
+    minreducedheight: {
+        valType: 'number',
+        min: 2,
+        dflt: 64,
+        editType: 'plot',
+        description: 'Minimum height of the plot with margin.automargin applied (in px)'
+    },
     margin: {
         l: {
             valType: 'number',

src/plots/plots.js

@@ -1506,6 +1506,9 @@ plots.supplyLayoutGlobalDefaults = function(layoutIn, layoutOut, formatObj) {
 
     coerce('width');
     coerce('height');
+    coerce('minreducedwidth');
+    coerce('minreducedheight');
+
     coerce('margin.l');
     coerce('margin.r');
     coerce('margin.t');
@@ -1861,10 +1864,6 @@ function initMargins(fullLayout) {
 var MIN_SPECIFIED_WIDTH = 2;
 var MIN_SPECIFIED_HEIGHT = 2;
 
-// could be exposed as an option - the smallest we will allow automargin to shrink a larger plot
-var MIN_REDUCED_WIDTH = 64;
-var MIN_REDUCED_HEIGHT = 64;
-
 /**
  * autoMargin: called by components that may need to expand the margins to
  * be rendered on-plot.
@@ -1885,17 +1884,19 @@ plots.autoMargin = function(gd, id, o) {
     var width = fullLayout.width;
     var height = fullLayout.height;
     var margin = fullLayout.margin;
+    var minreducedwidth = fullLayout.minreducedwidth;
+    var minreducedheight = fullLayout.minreducedheight;
 
     var minFinalWidth = Lib.constrain(
         width - margin.l - margin.r,
         MIN_SPECIFIED_WIDTH,
-        MIN_REDUCED_WIDTH
+        minreducedwidth
     );
 
     var minFinalHeight = Lib.constrain(
         height - margin.t - margin.b,
         MIN_SPECIFIED_HEIGHT,
-        MIN_REDUCED_HEIGHT
+        minreducedheight
     );
 
     var maxSpaceW = Math.max(0, width - minFinalWidth);
@@ -1974,6 +1975,8 @@ plots.doAutoMargin = function(gd) {
     var mb = margin.b;
     var pushMargin = fullLayout._pushmargin;
     var pushMarginIds = fullLayout._pushmarginIds;
+    var minreducedwidth = fullLayout.minreducedwidth;
+    var minreducedheight = fullLayout.minreducedheight;
 
     if(fullLayout.margin.autoexpand !== false) {
         for(var k in pushMargin) {
@@ -2032,13 +2035,13 @@ plots.doAutoMargin = function(gd) {
     var minFinalWidth = Lib.constrain(
         width - margin.l - margin.r,
         MIN_SPECIFIED_WIDTH,
-        MIN_REDUCED_WIDTH
+        minreducedwidth
     );
 
     var minFinalHeight = Lib.constrain(
         height - margin.t - margin.b,
         MIN_SPECIFIED_HEIGHT,
-        MIN_REDUCED_HEIGHT
+        minreducedheight
     );
 
     var maxSpaceW = Math.max(0, width - minFinalWidth);

test/image/mocks/z-automargin-minreducedheight.json

@@ -0,0 +1,55 @@
+{
+    "data": [{
+            "name": "< D E A T H >",
+            "marker": { "color": "red" },
+            "x": [
+                "Antonio Vivaldi",
+                "Johann Sebastian Bach",
+                "Wolfgang Amadeus Mozart",
+                "Ludwig van Beethoven"
+            ],
+            "y": [
+                "1741",
+                "1750",
+                "1791",
+                "1827"
+            ]
+    },
+    {
+        "name": "< B I R T H >",
+        "marker": { "color": "blue" },
+        "x": [
+            "Antonio Vivaldi",
+            "Johann Sebastian Bach",
+            "Wolfgang Amadeus Mozart",
+            "Ludwig van Beethoven"
+        ],
+        "y": [
+            "1678",
+            "1685",
+            "1756",
+            "1770"
+        ]
+    }],
+    "layout": {
+        "title": {
+            "text": "Longest and shortest<br>names and time periods"
+        },
+        "width": 240,
+        "height": 300,
+        "minreducedheight": 55,
+        "margin": {
+            "t": 80,
+            "b": 20,
+            "l": 20,
+            "r": 20
+        },
+        "yaxis": {
+            "type": "date",
+            "automargin": true
+        },
+        "xaxis": {
+            "automargin": true
+        }
+    }
+}

test/image/mocks/z-automargin-minreducedwidth.json

@@ -0,0 +1,56 @@
+{
+    "data": [{
+            "name": "< D E A T H >",
+            "marker": { "color": "red" },
+            "y": [
+                "A n t o n i o   V i v a l d i",
+                "J o h a n n   S e b a s t i a n   B a c h",
+                "W o l f g a n g   A m a d e u s   M o z a r t",
+                "L u d w i g   v a n   B e e t h o v e n"
+            ],
+            "x": [
+                "1741",
+                "1750",
+                "1791",
+                "1827"
+            ]
+    },
+    {
+        "name": "< B I R T H >",
+        "marker": { "color": "blue" },
+        "y": [
+            "A n t o n i o   V i v a l d i",
+            "J o h a n n   S e b a s t i a n   B a c h",
+            "W o l f g a n g   A m a d e u s   M o z a r t",
+            "L u d w i g   v a n   B e e t h o v e n"
+        ],
+        "x": [
+            "1678",
+            "1685",
+            "1756",
+            "1770"
+        ]
+    }],
+    "layout": {
+        "showlegend": false,
+        "title": {
+            "text": "Longest and shortest<br>names and time periods"
+        },
+        "width": 240,
+        "height": 200,
+        "minreducedwidth": 55,
+        "margin": {
+            "t": 80,
+            "b": 20,
+            "l": 20,
+            "r": 20
+        },
+        "xaxis": {
+            "type": "date",
+            "automargin": true
+        },
+        "yaxis": {
+            "automargin": true
+        }
+    }
+}

test/jasmine/tests/plots_test.js

@@ -1326,3 +1326,46 @@ describe('grids', function() {
         .then(done, done.fail);
     });
 });
+
+describe('Test Plots with automargin and minreducedwidth/height', function() {
+    var gd;
+
+    beforeEach(function() {
+        gd = createGraphDiv();
+    });
+
+    afterEach(destroyGraphDiv);
+
+    it('should resize the plot area when tweaking min-reduced width & height', function(done) {
+        function assert(attr, exp) {
+            var xy = d3Select('rect.nsewdrag')[0][0];
+            expect(xy.getAttribute(attr)).toEqual(exp);
+        }
+
+        function assertClose(attr, exp) {
+            var xy = d3Select('rect.nsewdrag')[0][0];
+            expect(xy.getAttribute(attr)).toBeCloseTo(exp, -1);
+        }
+
+        var fig = require('@mocks/z-automargin-minreducedheight.json');
+
+        Plotly.newPlot(gd, fig)
+        .then(function() {
+            assertClose('height', '55');
+        })
+        .then(function() {
+            return Plotly.relayout(gd, 'minreducedheight', 100);
+        })
+        .then(function() {
+            assert('height', '100');
+        })
+        .then(function() {
+            return Plotly.relayout(gd, 'minreducedwidth', 100);
+        })
+        .then(function() {
+            assert('width', '100');
+            assert('height', '100');
+        })
+        .then(done, done.fail);
+    });
+});

test/plot-schema.json

@@ -3386,6 +3386,20 @@
     "editType": "none",
     "valType": "string"
    },
+   "minreducedheight": {
+    "description": "Minimum height of the plot with margin.automargin applied (in px)",
+    "dflt": 64,
+    "editType": "plot",
+    "min": 2,
+    "valType": "number"
+   },
+   "minreducedwidth": {
+    "description": "Minimum width of the plot with margin.automargin applied (in px)",
+    "dflt": 64,
+    "editType": "plot",
+    "min": 2,
+    "valType": "number"
+   },
    "modebar": {
     "activecolor": {
      "description": "Sets the color of the active or hovered on icons in the modebar.",