#136 wxFreechart: report about a bug of categoryaxis and patch

[Anonymous]

I'm using freechart to drawing ganttchart and found a bug of categoryaxis when there are only one category(one task in ganttchart),freechart just can't show any chart.

bellow is the patch:

//--------------------------------------
categoryaxis.cpp
//--------------------------------------

void CategoryAxis::GetDataBounds(double &minValue, double &maxValue)
{
minValue = 0;
if (m_categoryCount > 1) {
maxValue = m_categoryCount - 1;
}
else if ( m_categoryCount == 1 )
{
maxValue = 1;
}
else {
maxValue = 0;
}
}

this patch runs OK,but is there more elegant fixing?

BTW:I'm using freechart to draw "resource occupy" ganttchart,but I found that it' really not so elegant as you have to drawing in"task" mode.

"resource occupy" chart means there many resource(such as machines),and occupy by task(such as client/order) along time line.

Is there a elegant way to drawing such chart?