fix issue when there is multiple legends

Author: galvisgilberto

plotly/plotlyfig.m

@@ -761,10 +761,14 @@ function validate(obj)
             end
 
             % update legends
-            for n = 1:obj.State.Figure.NumLegends
-                if ~strcmpi(obj.PlotOptions.TreatAs, 'pie3')
-                    updateLegend(obj,n);
+            if obj.State.Figure.NumLegends < 2
+                for n = 1:obj.State.Figure.NumLegends
+                    if ~strcmpi(obj.PlotOptions.TreatAs, 'pie3')
+                        updateLegend(obj,n);
+                    end
                 end
+            else
+                updateLegendMultipleAxes(obj,1);
             end
 
             % update colorbars

plotly/plotlyfig_aux/core/updateLegendMultipleAxes.m

@@ -0,0 +1,127 @@
+function obj = updateLegendMultipleAxes(obj, legIndex)
+
+% x: ...[DONE]
+% y: ...[DONE]
+% traceorder: ...[DONE]
+% font: ...[DONE]
+% bgcolor: ...[DONE]
+% bordercolor: ...[DONE]
+% borderwidth: ...[DONE]
+% xref: ...[DONE]
+% yref: ...[DONE]
+% xanchor: ...[DONE]
+% yanchor: ...[DONE]
+
+%=========================================================================%
+%
+%-GET NECESSARY INFO FOR MULTIPLE LEGENDS-%
+%
+%=========================================================================%
+
+for traceIndex = 1:obj.State.Figure.NumPlots
+    allNames{traceIndex} = obj.data{traceIndex}.name;
+    allShowLegens(traceIndex) = obj.data{traceIndex}.showlegend;
+    obj.data{traceIndex}.showlegend = false;
+    obj.data{traceIndex}.legendgroup = obj.data{traceIndex}.name;
+
+    axIndex = obj.getAxisIndex(obj.State.Plot(traceIndex).AssociatedAxis);
+    [xSource, ySource] = findSourceAxis(obj, axIndex);
+    xAxis = eval(sprintf('obj.layout.xaxis%d', xSource));
+    yAxis = eval(sprintf('obj.layout.yaxis%d', xSource));
+
+    allDomain(traceIndex, 1) = max(xAxis.domain);
+    allDomain(traceIndex, 2) = max(yAxis.domain);
+end
+
+[~, groupIndex] = unique(allNames);
+
+for traceIndex = groupIndex'
+   obj.data{traceIndex}.showlegend = allShowLegens(traceIndex); 
+end
+
+%-------------------------------------------------------------------------%
+
+%-STANDARDIZE UNITS-%
+legendUnits = get(obj.State.Legend(legIndex).Handle,'Units');
+fontUnits = get(obj.State.Legend(legIndex).Handle,'FontUnits');
+set(obj.State.Legend(legIndex).Handle,'Units','normalized');
+set(obj.State.Legend(legIndex).Handle,'FontUnits','points');
+
+%-------------------------------------------------------------------------%
+
+%-LEGEND DATA STRUCTURE-%
+legendData = get(obj.State.Legend(legIndex).Handle);
+
+% only displays last legend as global Plotly legend
+obj.layout.legend = struct();
+
+%-------------------------------------------------------------------------%
+
+%-layout showlegend-%
+obj.layout.showlegend = strcmpi(legendData.Visible,'on');
+
+%-------------------------------------------------------------------------%
+
+%-legend (x,y) coordenates-%
+obj.layout.legend.x = 1.005 * max(allDomain(:,1));
+obj.layout.legend.y = 1.001 * max(allDomain(:,2));;
+
+%-legend (x,y) refs-%
+obj.layout.legend.xref = 'paper';
+obj.layout.legend.yref = 'paper';
+
+%-legend (x,y) anchors-%
+obj.layout.legend.xanchor = 'left';
+obj.layout.legend.yanchor = 'top';
+
+%-------------------------------------------------------------------------%
+
+if (strcmp(legendData.Box,'on') && strcmp(legendData.Visible, 'on'))
+    
+    %---------------------------------------------------------------------%
+    
+    %-legend traceorder-%
+    obj.layout.legend.traceorder = 'normal';
+    
+    %---------------------------------------------------------------------%
+    
+    %-legend borderwidth-%
+    obj.layout.legend.borderwidth = legendData.LineWidth;
+    
+    %---------------------------------------------------------------------%
+    
+    %-legend bordercolor-%
+    col = 255*legendData.EdgeColor;
+    obj.layout.legend.bordercolor = sprintf('rgb(%f,%f,%f)', col);
+    
+    %---------------------------------------------------------------------%
+    
+    %-legend bgcolor-%
+    col = 255*legendData.Color;
+    obj.layout.legend.bgcolor = sprintf('rgb(%f,%f,%f)', col);
+    
+    %---------------------------------------------------------------------%
+    
+    %-legend font size-%
+    obj.layout.legend.font.size = legendData.FontSize;
+    
+    %---------------------------------------------------------------------%
+    
+    %-legend font family-%
+    obj.layout.legend.font.family = matlab2plotlyfont(legendData.FontName);
+    
+    %---------------------------------------------------------------------%
+    
+    %-legend font colour-%
+    col = 255*legendData.TextColor;
+    obj.layout.legend.font.color = sprintf('rgb(%f,%f,%f)', col);
+    
+end
+
+%-------------------------------------------------------------------------%
+
+%-REVERT UNITS-%
+set(obj.State.Legend(legIndex).Handle,'Units',legendUnits);
+set(obj.State.Legend(legIndex).Handle,'FontUnits',fontUnits);
+
+end