private void drawBarChart(IDrawContext context, Axis axisX, Axis axisY)
{
var plotBase = new PointF(context.PlotArea.Left, context.PlotArea.Top);
//まずx=1の幅を求める
float dx = 0;
{
const int mergin = 2; //マージン
const float minWidh = 1f; //最低幅
var pX1 = new PointF();
setPhisicalPos(ref pX1, 1, 0, axisX, axisY, plotBase); //x=1の場所
dx = (pX1.X - plotBase.X - mergin); //1要素の幅(原点とx=1の差)
if (dx <= minWidh)
{
dx = minWidh; //最低幅クリップ
}
}
//全部描く
for (var i = 0; i < items.Count; i++)
{
if (items[i].Value > 0) //ゼロは書かない
{
//箱座標
PointF pTop = new PointF();
setPhisicalPos(ref pTop, items[i].Key, items[i].Value, axisX, axisY, plotBase);
var rect = new RectangleF(pTop.X - (dx / 2), pTop.Y, dx, context.PlotArea.Bottom - pTop.Y);
//左端より出てる分を切り捨てる
if (rect.Left < plotBase.X)
{
var sub = plotBase.X - rect.Left;
rect.X = plotBase.X;
rect.Width -= sub;
}
//右端より出てる分を切り捨てる
if (rect.Right > context.PlotArea.Right)
{
rect.Width -= (rect.Right - context.PlotArea.Right);
}
//箱描画
context.DrawRect(rect, 1, Color, Color);
}
}
}
