Fixed #1017: Allow overriding of the minWidth of bars while zooming out. Fix the variable month width bug. Update documentation to better describe the current behavior.

docs/graph2d/index.html

@@ -434,7 +434,7 @@ var options = {
             <td class="greenField indent">barChart.sideBySide</td>
             <td>Boolean</td>
             <td>false</td>
-            <td>If two datapoints of a barchart overlap, they are drawn over eachother by default. If sideBySide is set to true, they will be drawn side by side.
+            <td>If two datapoints of a barchart overlap, they are drawn over eachother by default. If sideBySide is set to true, they will be drawn side by side, within the same width as a single bar..
                 See <a href="../../examples/graph2d/10_barsSideBySide.html">example 10</a> for more information.
                 When using groups, see <a href="../../examples/graph2d/11_barsSideBySideGroups.html">example 11</a>.
             </td>
@@ -445,7 +445,12 @@ var options = {
             <td>50</td>
             <td>The width of the bars.</td>
         </tr>
-
+        <tr parent="barChart" class="hidden">
+            <td class="greenField indent">barChart.minWidth</td>
+            <td>Number</td>
+            <td></td>
+            <td>The minimum width of the bars in pixels: by default the bars get smaller while zooming out to prevent overlap, this value is the minimum width of the bar. Default behavior (when minWidth is not set) is 10% of the bar width.</td>
+        </tr>
         <tr class='toggle collapsible' onclick="toggleTable('g2dOptions','dataAxis', this);">
             <td><span parent="dataAxis" class="right-caret"></span> dataAxis</td>
             <td>Object</td>

lib/timeline/component/graph2d_types/bar.js

@@ -94,7 +94,7 @@ Bargraph.draw = function (groupIds, processedGroupData, framework) {
   // plot barchart
   for (i = 0; i < combinedData.length; i++) {
     group = framework.groups[combinedData[i].groupId];
-    var minWidth = 0.1 * group.options.barChart.width;
+    var minWidth = group.options.barChart.minWidth != undefined ? group.options.barChart.minWidth : 0.1 * group.options.barChart.width;
 
     key = combinedData[i].screen_x;
     var heightOffset = 0;
@@ -102,9 +102,6 @@ Bargraph.draw = function (groupIds, processedGroupData, framework) {
       if (i + 1 < combinedData.length) {
         coreDistance = Math.abs(combinedData[i + 1].screen_x - key);
       }
-      if (i > 0) {
-        coreDistance = Math.min(coreDistance, Math.abs(combinedData[i - 1].screen_x - key));
-      }
       drawData = Bargraph._getSafeDrawData(coreDistance, group, minWidth);
     }
     else {
@@ -113,9 +110,6 @@ Bargraph.draw = function (groupIds, processedGroupData, framework) {
       if (nextKey < combinedData.length) {
         coreDistance = Math.abs(combinedData[nextKey].screen_x - key);
       }
-      if (prevKey > 0) {
-        coreDistance = Math.min(coreDistance, Math.abs(combinedData[prevKey].screen_x - key));
-      }
       drawData = Bargraph._getSafeDrawData(coreDistance, group, minWidth);
       intersections[key].resolved += 1;
 
@@ -132,12 +126,6 @@ Bargraph.draw = function (groupIds, processedGroupData, framework) {
       else if (group.options.barChart.sideBySide === true) {
         drawData.width = drawData.width / intersections[key].amount;
         drawData.offset += (intersections[key].resolved) * drawData.width - (0.5 * drawData.width * (intersections[key].amount + 1));
-        if (group.options.barChart.align === 'left') {
-          drawData.offset -= 0.5 * drawData.width;
-        }
-        else if (group.options.barChart.align === 'right') {
-          drawData.offset += 0.5 * drawData.width;
-        }
       }
     }
     DOMutil.drawBar(combinedData[i].screen_x + drawData.offset, combinedData[i].screen_y - heightOffset, drawData.width, group.zeroPosition - combinedData[i].screen_y, group.className + ' vis-bar', framework.svgElements, framework.svg, group.style);
@@ -201,7 +189,7 @@ Bargraph._getDataIntersections = function (intersections, combinedData) {
 Bargraph._getSafeDrawData = function (coreDistance, group, minWidth) {
   var width, offset;
   if (coreDistance < group.options.barChart.width && coreDistance > 0) {
-    width = coreDistance < minWidth ? minWidth : coreDistance;
+    width = coreDistance < minWidth ? minWidth : coreDistance
 
     offset = 0; // recalculate offset with the new width;
     if (group.options.barChart.align === 'left') {

lib/timeline/optionsGraph2d.js

@@ -40,6 +40,7 @@ let allOptions = {
   style: {string:['line','bar','points']}, // line, bar
   barChart: {
     width: {number},
+    minWidth: {number},
     sideBySide: {boolean},
     align: {string:['left','center','right']},
     __type__: {object}
@@ -179,6 +180,7 @@ let configureOptions = {
     style: ['line','bar','points'], // line, bar
     barChart: {
       width: [50,5,100,5],
+      minWidth: [50,5,100,5],
       sideBySide: false,
       align: ['left','center','right'] // left, center, right
     },