/// <summary>
/// 繪製 AxisX 座標軸
/// </summary>
/// <param name="axis">AxisX 座標軸</param>
/// <param name="property">Chart 屬性參數</param>
public override void DrawAxisX(AxisX axis, ChartProperty property)
{
uint uPattern = 0xaaaaaaaa; //格線樣式(Gdi.cs 內的 SelectPen 方法有定義格式, 格式皆由 Plugin 設計者自由規劃)
int iOldBKColor = __cGDI.SelectBackground(property.BackgroundColor);
IntPtr cOldPen = __cGDI.SelectPen(new PowerLanguage.PenStyle(property.GridColor, 1, (int)uPattern));
IntPtr cGridPen = __cGDI.SelectPen(new PowerLanguage.PenStyle(property.ForeColor, 1));
IntPtr cOldFont = __cGDI.SelectFont(property.AxisFont);
List <AxisXLabel> cAxises = axis.CalculateAxisScale();
Rectangle cRect = axis.AxisRectangle;
__cGDI.FillRectangle(property.BackgroundColor, cRect.Left, cRect.Top, cRect.Width, cRect.Height);
int iCount = cAxises.Count;
for (int i = 0; i < iCount; i++)
{
AxisXLabel cLabel = cAxises[i];
AxisXUnit cUnit = axis.ConvertBarNumberToWidth(cLabel.BarNumber);
int iAbsWidth = cRect.Left + cUnit.CenterPoint;
int iCharWidth = iAbsWidth + axis.FontMetrics.Width * 11; //MM/dd HH:mm (11 chars)
if (iCharWidth < cRect.Width)
{
__cGDI.DrawLine(iAbsWidth, cRect.Top, iAbsWidth, cRect.Top + 5);
__cGDI.DrawString(cLabel.Time.ToString((i == 0) ? "yyyy/MM/dd" : "MM/dd HH:mm"), property.ForeColor, iAbsWidth, cRect.Top + 5);
if (property.IsShowGrid)
{
//繪製格線(因為 AxisX 軸在最下方, 格線往上延伸即可)
IntPtr cAxisPen = __cGDI.SelectPen(cGridPen);
__cGDI.DrawLine(iAbsWidth, 0, iAbsWidth, cRect.Top);
__cGDI.SelectPen(cAxisPen);
}
}
}
__cGDI.RemoveObject(cGridPen);
__cGDI.RemoveObject(__cGDI.SelectPen(cOldPen));
__cGDI.RemoveObject(__cGDI.SelectFont(cOldFont));
__cGDI.SelectBackground(iOldBKColor);
}