NEWS.md
In rlc: Create Interactive Linked Charts with Minimal Code

rlc 0.4.1

lc_input now has fontSize, nrows and ncols properties, bugs with assigning labels to wrong check boxes/radio buttons fixed.
lc_heatmap now has valueTextColour property, also the way how text values are shown (textValue = TRUE) is changed.
in heatmaps, marked cells are now highlighted differently to make them more visible.
elements argument in the mark function is now optional.
RGBA colours are now accepted (for example, in palette argument), however the value of alpha is ignored.
onlyServer argument added to the openPage function to prevent opening a browser tab.
A bug that caused restarting a local server multiple times fixed.
minor styling changes.

A set of properties to control charts' legends added: legend_width, legend_height, lgend_sampleHeight, legend_ncol, legend_container.
Property informText added. It allows to specify the content of the tooltip text for each element.
data.frames and lists provided to the with argument are no longer re-evaluated automatically. By default, they are considered static. To treat them as dynamic arguments, they should be put inside the dat function.
Some styling changes.

on_clickPosition no longer adds extra 1 to the reported values
lc_input values no longer get stuck
In the table layout, unnecessary D3 data are no longer propagated to the children elements.
on_click for histograms now gets a proper index value.
NAs values for lc_input don't cause problems any more.
Issue with colour scale get stuck in the legend fixed.

New function lc_image added. It can add to the web page a graphic R object or a locally stored image.
All charts now have a with argument, that allows to specify a data.frame which columns can be used as variables.
Charts with axes now have on_clickPosition argument. It is a callback function, that receives a position of any click relative to current axes scales.
function mark now has clear argument which, if TRUE unmarks all previously marked elements.
pacerStep argument now is also added to lines.
Legends no longer have default titles.
Now callback functions can access variables .chartId and .layerId
Some changes in stylesheet.
mouseout event also uses pacer that prevents overqueuing
Various bugs fixed.

New argument with in all the plotting functions. This argument allows to provide a data table, that will be used to evaluate properties.
Most legend titles are omitted if not defined.
Bug with mispositioning a click in newest versions of Firefox fixed... again.

It is possible now to create server apps that can be accessed by multiple users simultaneously. To this end, one should use arguments sessionVars, beforeLoad and afterLoad of the openPage functions. sessionVars defines local variables with their default values for each client, beforeLoad and afterLoad are callback functions that are called once for each new web page. Other than that, there are no differences between creating an rlc app locally or on a server.
rlc has been restructured so that the entire app is now stored inside a single R6 object of class LCApp (see man pages for more details).
Property axesTitlePos added for all the charts that have axes. This property allows to place axis labels above or below the x-axis (to the left or to the right from the y-axis) and at the end, in the middle or next to the start of the axis.
Now scatter plots in canvas mode also have ticks that indicate presence of points outside of the current axes range.
NAs are correctly processed.
Bug with mispositioning a click in Firefox v.70 fixed.