add bold to treemap label

[mierin12]

Hello,

This is a proposition to add bold to the security name in TreeMap.
In the tooltips of Donut and Pie Chart they are already in bold, so I thought it looks more consistent.

Before :

After :

I assumed there would always be two lines of label at least, so setFont(defaultFont) is always called in the different loops, so no need to set it again after the loops. but maybe it would have been safer ?

[buchen]

Nice addition. But I think we should not create the bold font in every drawRectangle function. I think it is a fairly expensive operation.

I assumed there would always be two lines of label at least, so setFont(defaultFont) is always called in the different loops, so no need to set it again after the loops. but maybe it would have been safer ?

I think it is good practice to leave the graphics context as it was received, i.e. set back the default font.