internal static void DrawGrid(Graphics graphics, Rectangle viewableRectangle)
{
AmbientTheme ambientTheme = WorkflowTheme.CurrentTheme.AmbientTheme;
if (ambientTheme.GridStyle == DashStyle.Dot)
{
Point empty = Point.Empty;
empty.X = viewableRectangle.X - (viewableRectangle.X % ambientTheme.GridSize.Width);
empty.Y = viewableRectangle.Y - (viewableRectangle.Y % ambientTheme.GridSize.Height);
for (int i = empty.X; i <= viewableRectangle.Right; i += Math.Max(ambientTheme.GridSize.Width, 1))
{
for (int j = empty.Y; j <= viewableRectangle.Bottom; j += Math.Max(ambientTheme.GridSize.Height, 1))
{
graphics.FillRectangle(ambientTheme.MajorGridBrush, new Rectangle(new Point(i, j), new Size(1, 1)));
if ((((i + (ambientTheme.GridSize.Width / 2)) >= viewableRectangle.Left) && ((i + (ambientTheme.GridSize.Width / 2)) <= viewableRectangle.Right)) && (((j + (ambientTheme.GridSize.Height / 2)) >= viewableRectangle.Top) && ((j + (ambientTheme.GridSize.Height / 2)) <= viewableRectangle.Bottom)))
{
graphics.FillRectangle(ambientTheme.MinorGridBrush, new Rectangle(new Point(i + (ambientTheme.GridSize.Width / 2), j + (ambientTheme.GridSize.Height / 2)), new Size(1, 1)));
}
}
}
}
else
{
using (Hdc hdc = new Hdc(graphics))
{
using (HPen pen = new HPen(ambientTheme.MajorGridPen))
{
using (HPen pen2 = new HPen(ambientTheme.MinorGridPen))
{
hdc.DrawGrid(pen, pen2, viewableRectangle, ambientTheme.GridSize, true);
}
}
}
}
}
/// <summary>
/// This allows collections to treat DeviceContext objects wrapping the same HDC as the same objects.
/// </summary>
public override int GetHashCode()
{
return(Hdc.GetHashCode());
}
/// <summary> /// This allows collections to treat DeviceContext objects wrapping the same HDC as the same objects. /// </summary> public override int GetHashCode() => Hdc.GetHashCode();
internal static void DrawGrid(Graphics graphics, Rectangle viewableRectangle)
{
AmbientTheme ambientTheme = WorkflowTheme.CurrentTheme.AmbientTheme;
if (ambientTheme.GridStyle == DashStyle.Dot)
{
Point gridStart = Point.Empty;
gridStart.X = viewableRectangle.X - (viewableRectangle.X % ambientTheme.GridSize.Width);
gridStart.Y = viewableRectangle.Y - (viewableRectangle.Y % ambientTheme.GridSize.Height);
for (int gridCoOrdX = gridStart.X; gridCoOrdX <= viewableRectangle.Right; gridCoOrdX += Math.Max(ambientTheme.GridSize.Width, 1))
{
for (int gridCoOrdY = gridStart.Y; gridCoOrdY <= viewableRectangle.Bottom; gridCoOrdY += Math.Max(ambientTheme.GridSize.Height, 1))
{
graphics.FillRectangle(ambientTheme.MajorGridBrush, new Rectangle(new Point(gridCoOrdX, gridCoOrdY), new Size(1, 1)));
if (((gridCoOrdX + ambientTheme.GridSize.Width / 2) >= viewableRectangle.Left && (gridCoOrdX + ambientTheme.GridSize.Width / 2) <= viewableRectangle.Right) &&
((gridCoOrdY + ambientTheme.GridSize.Height / 2) >= viewableRectangle.Top && (gridCoOrdY + ambientTheme.GridSize.Height / 2) <= viewableRectangle.Bottom))
graphics.FillRectangle(ambientTheme.MinorGridBrush, new Rectangle(new Point(gridCoOrdX + ambientTheme.GridSize.Width / 2, gridCoOrdY + ambientTheme.GridSize.Height / 2), new Size(1, 1)));
}
}
}
else
{
//We use native pens to draw the grid for efficiency reason
using (Hdc hdc = new Hdc(graphics))
using (HPen majorGridPen = new HPen(ambientTheme.MajorGridPen))
using (HPen minorGridPen = new HPen(ambientTheme.MinorGridPen))
{
hdc.DrawGrid(majorGridPen, minorGridPen, viewableRectangle, ambientTheme.GridSize, true);
}
}
}
