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Bug 797893 - Unable to change font size in charts

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The bug specifies chart fonts are not customisable. We can copy the
(gnucash) stylesheet properties which define <h3> and <body> font
styles onto chartjs properties.
This commit is contained in:
Christopher Lam 2020-09-26 17:43:17 +08:00
parent 05bf2d7a9c
commit b72014c7de
1 changed files with 13 additions and 4 deletions
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17
gnucash/report/html-chart.scm
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@ -186,7 +186,6 @@
(cons 'display #t)
(cons 'labelString "")))
(cons 'ticks (list
(cons 'fontSize 12)
(cons 'maxRotation 30))))
;; the following another xAxis at the top
'((position . top)
@ -205,7 +204,6 @@
(cons 'display 1.5)
(cons 'labelString "")))
(cons 'ticks (list
(cons 'fontSize 10)
(cons 'beginAtZero #f))))
;; the following another yAxis on the right
'((position . right)
@ -215,7 +213,6 @@
))))
(cons 'title (list
(cons 'display #t)
(cons 'fontSize 16)
(cons 'fontStyle "")
(cons 'text ""))))))
"XXX" ;currency-iso
@ -348,6 +345,17 @@ Chart.pluginService.register({
}
})
// copy font info from css into chartjs.
bodyStyle = window.getComputedStyle (document.querySelector ('body'));
Chart.defaults.global.defaultFontSize = parseInt (bodyStyle.fontSize);
Chart.defaults.global.defaultFontFamily = bodyStyle.fontFamily;
Chart.defaults.global.defaultFontStyle = bodyStyle.fontStyle;
titleStyle = window.getComputedStyle (document.querySelector ('h3'));
chartjsoptions.options.title.fontSize = parseInt (titleStyle.fontSize);
chartjsoptions.options.title.fontFamily = titleStyle.fontFamily;
chartjsoptions.options.title.fontStyle = titleStyle.fontStyle;
document.getElementById(chartid).onclick = function(evt) {
var activepoints = myChart.getElementAtEvent(evt);
var anchor = document.getElementById(jumpid);
@ -403,6 +411,8 @@ document.getElementById(chartid).onclick = function(evt) {
(push (gnc:html-js-include
(gnc-path-find-localized-html-file "chartjs/Chart.bundle.min.js")))
;; the following hidden h3 is used to query style and copy onto chartjs
(push "<h3 style='display:none'></h3>")
(push (format #f "<div style='width:~a;height:~a;'>\n"
(size->str (gnc:html-chart-width chart))
(size->str (gnc:html-chart-height chart))))
@ -428,7 +438,6 @@ document.getElementById(chartid).onclick = function(evt) {
(push "chartjsoptions.options.tooltips.callbacks.label = tooltipLabel;\n")
(push "chartjsoptions.options.tooltips.callbacks.title = tooltipTitle;\n")
(push "Chart.defaults.global.defaultFontFamily = \"'Trebuchet MS', Arial, Helvetica, sans-serif\";\n")
(push JS-setup)
(push "var myChart = new Chart(chartid, chartjsoptions);\n")