/// <summary>
/// Renders the current <see cref="Model"/> on the specified line <paramref name="y"/>
/// </summary>
/// <param name="driver"></param>
/// <param name="colorScheme"></param>
/// <param name="y"></param>
/// <param name="availableWidth"></param>
public virtual void Draw(ConsoleDriver driver, ColorScheme colorScheme, int y, int availableWidth)
{
// true if the current line of the tree is the selected one and control has focus
bool isSelected = tree.IsSelected(Model) && tree.HasFocus;
Attribute lineColor = isSelected ? colorScheme.Focus : colorScheme.Normal;
driver.SetAttribute(lineColor);
// Everything on line before the expansion run and branch text
Rune [] prefix = GetLinePrefix(driver).ToArray();
Rune expansion = GetExpandableSymbol(driver);
string lineBody = tree.AspectGetter(Model) ?? "";
tree.Move(0, y);
// if we have scrolled to the right then bits of the prefix will have dispeared off the screen
int toSkip = tree.ScrollOffsetHorizontal;
// Draw the line prefix (all paralell lanes or whitespace and an expand/collapse/leaf symbol)
foreach (Rune r in prefix)
{
if (toSkip > 0)
{
toSkip--;
}
else
{
driver.AddRune(r);
availableWidth -= Rune.ColumnWidth(r);
}
}
// pick color for expanded symbol
if (tree.Style.ColorExpandSymbol || tree.Style.InvertExpandSymbolColors)
{
Attribute color;
if (tree.Style.ColorExpandSymbol)
{
color = isSelected ? tree.ColorScheme.HotFocus : tree.ColorScheme.HotNormal;
}
else
{
color = lineColor;
}
if (tree.Style.InvertExpandSymbolColors)
{
color = new Attribute(color.Background, color.Foreground);
}
driver.SetAttribute(color);
}
if (toSkip > 0)
{
toSkip--;
}
else
{
driver.AddRune(expansion);
availableWidth -= Rune.ColumnWidth(expansion);
}
// horizontal scrolling has already skipped the prefix but now must also skip some of the line body
if (toSkip > 0)
{
if (toSkip > lineBody.Length)
{
lineBody = "";
}
else
{
lineBody = lineBody.Substring(toSkip);
}
}
// If body of line is too long
if (lineBody.Sum(l => Rune.ColumnWidth(l)) > availableWidth)
{
// remaining space is zero and truncate the line
lineBody = new string (lineBody.TakeWhile(c => (availableWidth -= Rune.ColumnWidth(c)) >= 0).ToArray());
availableWidth = 0;
}
else
{
// line is short so remaining width will be whatever comes after the line body
availableWidth -= lineBody.Length;
}
// default behaviour is for model to use the color scheme
// of the tree view
var modelColor = lineColor;
// if custom color delegate invoke it
if (tree.ColorGetter != null)
{
var modelScheme = tree.ColorGetter(Model);
// if custom color scheme is defined for this Model
if (modelScheme != null)
{
// use it
modelColor = isSelected ? modelScheme.Focus : modelScheme.Normal;
}
}
driver.SetAttribute(modelColor);
driver.AddStr(lineBody);
driver.SetAttribute(lineColor);
if (availableWidth > 0)
{
driver.AddStr(new string (' ', availableWidth));
}
driver.SetAttribute(colorScheme.Normal);
}
void RenderLine(ConsoleDriver driver, IHasStats toRender, int col, int line, int width)
{
string suffix = " ";
//Get relation to player
if (toRender is IActor a)
{
var world = a.CurrentLocation.World;
var relationship = world.Relationships.SumBetween(a, world.Player);
if (relationship < -40)
{
suffix = "---";
}
else
if (relationship < -20)
{
suffix = "-- ";
}
else
if (relationship < 0)
{
suffix = "- ";
}
else
if (relationship > 40)
{
suffix = "+++";
}
else
if (relationship > 20)
{
suffix = "++ ";
}
else
if (relationship > 0)
{
suffix = "+ ";
}
}
//allow for the suffix
var ustring = toRender.ToString();
ustring = ustring.Substring(0, Math.Min(ustring.Length, width - 3)) + suffix;
ustring = ustring.PadRight(width);
int byteLen = ustring.Length;
int used = 0;
for (int i = 0; i < byteLen;)
{
(var rune, var size) = Utf8.DecodeRune(ustring, i, i - byteLen);
var count = Rune.ColumnWidth(rune);
if (used + count >= width)
{
break;
}
if (rune == '-')
{
driver.SetAttribute(_red);
}
else
if (rune == '+')
{
driver.SetAttribute(_green);
}
else
{
driver.SetAttribute(_normal);
}
driver.AddRune(rune);
used += count;
i += size;
}
for (; used < width; used++)
{
driver.AddRune(' ');
}
}
