private bool DrawCandlestick(int offset, int top, AxisXUnit unit, Color eraseColor)
{
double[] dValues = null;
bool bCheck = CheckBarsValue(offset, out dValues);
if (bCheck)
{
int iOpen = top + this.AxisY.ConvertValueToHeight(dValues[0]);
int iHigh = top + this.AxisY.ConvertValueToHeight(dValues[1]);
int iLow = top + this.AxisY.ConvertValueToHeight(dValues[2]);
int iClose = top + this.AxisY.ConvertValueToHeight(dValues[3]);
if (eraseColor != Color.Empty)
{
__cGDI.FillRectangle(eraseColor, unit.LeftPoint + 1, iHigh, (unit.RightPoint - unit.LeftPoint) - 2, iLow - iHigh + 1);
}
bool bOpenH = iOpen < iClose;
Color cColor = (bOpenH) ? this.ChartSetting.PenStyles[1].Color : this.ChartSetting.PenStyles[0].Color;
IntPtr cOldPtr = __cGDI.SelectPen(this.ChartSetting.PenStyles[2]);
__cGDI.DrawLine(unit.CenterPoint, iHigh, unit.CenterPoint, iLow);
__cGDI.FillRectangle(cColor, unit.LeftPoint + 1, (bOpenH) ? iOpen : iClose, (unit.RightPoint - unit.LeftPoint) - 2, ((bOpenH) ? iClose - iOpen : iOpen - iClose) + 1);
__cGDI.RemoveObject(__cGDI.SelectPen(cOldPtr));
}
return(bCheck);
}
private void DrawCellDrag(PaintEventArgs e)
{
if (DraggingCell != null)
{
var text = "";
int offsetX = 0;
int offsetY = 0;
if (QueryItemText != null)
{
QueryItemText(DraggingCell.RowIndex.Value, DraggingCell.Column, out text, ref offsetX, ref offsetY);
}
Color bgColor = _backColor;
if (QueryItemBkColor != null)
{
QueryItemBkColor(DraggingCell.RowIndex.Value, DraggingCell.Column, ref bgColor);
}
int x1 = _currentX.Value - (DraggingCell.Column.Width.Value / 2);
int y1 = _currentY.Value - (CellHeight / 2);
int x2 = x1 + DraggingCell.Column.Width.Value;
int y2 = y1 + CellHeight;
Gdi.SetBrush(bgColor);
Gdi.FillRectangle(x1, y1, x2 - x1, y2 - y1);
Gdi.PrepDrawString(NormalFont, _foreColor);
Gdi.DrawString(text, new Point(x1 + CellWidthPadding + offsetX, y1 + CellHeightPadding + offsetY));
}
}
/// <summary>
/// Given a cell with rowindex inbetween 0 and VisibleRows, it draws the background color specified. Do not call with absolute rowindices.
/// </summary>
private void DrawCellBG(Color color, Cell cell, List <RollColumn> visibleColumns)
{
int x, y, w, h;
if (HorizontalOrientation)
{
x = RowsToPixels(cell.RowIndex.Value) + 1;
w = CellWidth - 1;
y = (CellHeight * visibleColumns.IndexOf(cell.Column)) + 1 - VBar.Value; // We can't draw without row and column, so assume they exist and fail catastrophically if they don't
h = CellHeight - 1;
if (x < ColumnWidth)
{
return;
}
}
else
{
w = cell.Column.Width.Value - 1;
x = cell.Column.Left.Value - HBar.Value + 1;
y = RowsToPixels(cell.RowIndex.Value) + 1; // We can't draw without row and column, so assume they exist and fail catastrophically if they don't
h = CellHeight - 1;
if (y < ColumnHeight)
{
return;
}
}
if (x > DrawWidth || y > DrawHeight)
{
return;
} // Don't draw if off screen.
Gdi.SetBrush(color);
Gdi.FillRectangle(x, y, w, h);
}
protected override void OnPaint(PaintEventArgs e)
{
using (var LCK = Gdi.LockGraphics(e.Graphics))
{
Gdi.StartOffScreenBitmap(Width, Height);
// White Background
Gdi.SetBrush(Color.White);
Gdi.SetSolidPen(Color.White);
Gdi.FillRectangle(0, 0, Width, Height);
// Lag frame calculations
SetLagFramesArray();
var visibleColumns = _columns.VisibleColumns.ToList();
if (visibleColumns.Any())
{
DrawColumnBg(e, visibleColumns);
DrawColumnText(e, visibleColumns);
}
//Background
DrawBg(e, visibleColumns);
//Foreground
DrawData(e, visibleColumns);
DrawColumnDrag(e);
DrawCellDrag(e);
Gdi.CopyToScreen();
Gdi.EndOffScreenBitmap();
}
}
private void DrawColumnBg(PaintEventArgs e, List <RollColumn> visibleColumns)
{
Gdi.SetBrush(SystemColors.ControlLight);
Gdi.SetSolidPen(Color.Black);
if (HorizontalOrientation)
{
Gdi.FillRectangle(0, 0, ColumnWidth + 1, DrawHeight + 1);
Gdi.Line(0, 0, 0, visibleColumns.Count * CellHeight + 1);
Gdi.Line(ColumnWidth, 0, ColumnWidth, visibleColumns.Count * CellHeight + 1);
int start = -VBar.Value;
foreach (var column in visibleColumns)
{
Gdi.Line(1, start, ColumnWidth, start);
start += CellHeight;
}
if (visibleColumns.Any())
{
Gdi.Line(1, start, ColumnWidth, start);
}
}
else
{
int bottomEdge = RowsToPixels(0);
// Gray column box and black line underneath
Gdi.FillRectangle(0, 0, Width + 1, bottomEdge + 1);
Gdi.Line(0, 0, TotalColWidth.Value + 1, 0);
Gdi.Line(0, bottomEdge, TotalColWidth.Value + 1, bottomEdge);
// Vertical black seperators
for (int i = 0; i < visibleColumns.Count; i++)
{
int pos = visibleColumns[i].Left.Value - HBar.Value;
Gdi.Line(pos, 0, pos, bottomEdge);
}
// Draw right most line
if (visibleColumns.Any())
{
int right = TotalColWidth.Value - HBar.Value;
Gdi.Line(right, 0, right, bottomEdge);
}
}
// Emphasis
foreach (var column in visibleColumns.Where(c => c.Emphasis))
{
Gdi.SetBrush(SystemColors.ActiveBorder);
if (HorizontalOrientation)
{
Gdi.FillRectangle(1, visibleColumns.IndexOf(column) * CellHeight + 1, ColumnWidth - 1, ColumnHeight - 1);
}
else
{
Gdi.FillRectangle(column.Left.Value + 1 - HBar.Value, 1, column.Width.Value - 1, ColumnHeight - 1);
}
}
// If the user is hovering over a column
if (IsHoveringOnColumnCell)
{
if (HorizontalOrientation)
{
for (int i = 0; i < visibleColumns.Count; i++)
{
if (visibleColumns[i] != CurrentCell.Column)
{
continue;
}
if (CurrentCell.Column.Emphasis)
{
Gdi.SetBrush(Add(SystemColors.Highlight, 0x00222222));
}
else
{
Gdi.SetBrush(SystemColors.Highlight);
}
Gdi.FillRectangle(1, i * CellHeight + 1, ColumnWidth - 1, ColumnHeight - 1);
}
}
else
{
//TODO multiple selected columns
for (int i = 0; i < visibleColumns.Count; i++)
{
if (visibleColumns[i] == CurrentCell.Column)
{
//Left of column is to the right of the viewable area or right of column is to the left of the viewable area
if (visibleColumns[i].Left.Value - HBar.Value > Width || visibleColumns[i].Right.Value - HBar.Value < 0)
{
continue;
}
int left = visibleColumns[i].Left.Value - HBar.Value;
int width = visibleColumns[i].Right.Value - HBar.Value - left;
if (CurrentCell.Column.Emphasis)
{
Gdi.SetBrush(Add(SystemColors.Highlight, 0x00550000));
}
else
{
Gdi.SetBrush(SystemColors.Highlight);
}
Gdi.FillRectangle(left + 1, 1, width - 1, ColumnHeight - 1);
}
}
}
}
}