/// <summary>
/// Draws the grid center middle of the region.
/// </summary>
public static void Draw(ColorGridStyle style, Graphics graphics, Size drawRegion, bool enabled)
{
float cellDim = GetCellDimension(style, drawRegion);
float xOffset = (drawRegion.Width / 2f) - style.Colors.GetLength(0) * cellDim / 2;
float yOffset = (drawRegion.Height / 2f) - style.Colors.GetLength(1) * cellDim / 2;
float spacing = style.CellSpacingScale * cellDim;
var master = GetMasterRectangle(style, drawRegion);
var backPath = RoundedRectangleF.Create(master, style.RoundedRadius);
graphics.FillPath(enabled ? Brushes.Black : Brushes.DimGray, backPath);
for (int row = 0; row < style.Colors.GetLength(0); row++)
{
for (int clm = 0; clm < style.Colors.GetLength(1); clm++)
{
float dim = cellDim - spacing * 2;
var brush = new SolidBrush(style.Colors[clm, row]);
if (!enabled)
{
brush.Color = brush.Color.Desaturate();
}
float x = (xOffset + cellDim * row) + spacing;
float y = (yOffset + cellDim * clm) + spacing;
var path = RoundedRectangleF.Create(x, y, dim, dim, style.RoundedRadius);
graphics.FillPath(brush, path);
brush.Dispose();
}
}
}
/// <summary>
/// Gets the Bounds of a cell that contains the specified absolute position.
/// </summary>
/// <returns>Rectangle.Empty, if no cell contains the specified position.</returns>
public static RectangleF GetCellRectFromPosition(ColorGridStyle style, Point pos, Size drawRegion)
{
foreach (var rect in GetAllCellBounds(style, drawRegion))
{
if (rect.Contains(pos))
{
return(rect);
}
}
return(Rectangle.Empty);
}
/// <summary>
/// Gets the dimension of all cells.
/// </summary>
private static float GetCellDimension(ColorGridStyle style, Size drawRegion)
{
int gridWidth = style.Colors.GetLength(0);
int gridHeight = style.Colors.GetLength(1);
double widthRatio = (double)drawRegion.Width / gridWidth;
double heightRatio = (double)drawRegion.Height / gridHeight;
if (widthRatio > heightRatio)
{
return((float)drawRegion.Height / gridHeight);
}
return((float)drawRegion.Width / gridWidth);
}
/// <summary>
/// Gets the grid cell point that contains the specified absolute position.
/// </summary>
/// <returns>-1, if no cell contains the specified position.</returns>
public static Point GetGridPointFromPosition(ColorGridStyle style, Point pos, Size drawRegion)
{
var rects = GetAllCellBounds(style, drawRegion);
for (int x = 0; x < rects.GetLength(0); x++)
{
for (int y = 0; y < rects.GetLength(1); y++)
{
if (rects[x, y].Contains(pos))
{
return(new Point(y, x));
}
}
}
return(new Point(-1, -1));
}
/// <summary>
/// Gets the bounding rectangle for each of the cells in the grid.
/// </summary>
public static RectangleF[,] GetAllCellBounds(ColorGridStyle style, Size drawRegion)
{
var rects = new RectangleF[style.Colors.GetLength(0), style.Colors.GetLength(1)];
float cellDim = GetCellDimension(style, drawRegion);
// They will always be centered
float xOffset = (drawRegion.Width / 2f) - style.Colors.GetLength(0) * cellDim / 2;
float yOffset = (drawRegion.Height / 2f) - style.Colors.GetLength(1) * cellDim / 2;
for (int row = 0; row < style.Colors.GetLength(0); row++)
{
for (int clm = 0; clm < style.Colors.GetLength(1); clm++)
{
float y = yOffset + cellDim * clm;
float x = xOffset + cellDim * row;
float dim = cellDim;
rects[row, clm] = new RectangleF(x, y, dim, dim);
}
}
return(rects);
}
public static RectangleF GetMasterRectangle(ColorGridStyle style, Size drawRegion)
{
var bounds = GetAllCellBounds(style, drawRegion);
return(UniteRects(bounds));
}
