public override void Paint(Graphics graphics, DirectText directText, Font defaultFont, int initialTop, int width)
{
graphics.FillRectangle(SystemBrushes.Window, new Rectangle(0, initialTop, width, _height));
Rectangle rectangle = new Rectangle(
_margin, initialTop + (_height - 1) / 2, width - 2 * _margin, 1);
graphics.FillRectangle(Brushes.Gray, rectangle);
}
public override int GetHeight(DirectText directText, Font defaultFont, int width)
{
if (_layoutForWidth != width)
{
_layoutForWidth = width;
List<string> lines = new List<string>();
List<int> lineHeights = new List<int>();
_layoutHeight = 0;
string remaining = _text;
int availableWidth = width - _leftPadding - _rightPadding;
while (remaining.Length > 0)
{
// Break the remaining text into a line:
int fittingCharacterCount = directText.MeasureFittingCharacterCount(remaining, availableWidth, defaultFont);
fittingCharacterCount = Math.Max(1, fittingCharacterCount);
string line = remaining.Substring(0, fittingCharacterCount);
remaining = remaining.Substring(fittingCharacterCount);
lines.Add(line);
// Add the line height:
Size size = directText.MeasureString(line, defaultFont);
lineHeights.Add(size.Height);
_layoutHeight += size.Height;
}
_lines = lines.ToArray();
_lineHeights = lineHeights.ToArray();
}
return _layoutHeight;
}
public abstract void Paint(Graphics graphics, DirectText directText, Font defaultFont, int initialTop, int width);
public abstract void Initialize(DirectText directText, Font defaultFont);
public abstract int GetHeight(DirectText directText, Font defaultFont, int width);
public override void Paint(Graphics graphics, DirectText directText, Font defaultFont, int initialTop, int width)
{
graphics.FillRectangle(SystemBrushes.Window, new Rectangle(0, initialTop, width, _layoutHeight));
int top = initialTop;
for (int i = 0; i < _lines.Length; i++)
{
directText.DrawString(graphics, _lines[i], defaultFont, SystemColors.WindowText, _leftPadding, top);
top += _lineHeights[i];
}
}
public override void Initialize(DirectText directText, Font defaultFont)
{
Size size = directText.MeasureString(_text, defaultFont);
_fullWidthForEstimation = size.Width;
_heightForEstimation = size.Height;
}
void InitializeNewRows(DirectText directText, int width)
{
if (_rows.Count == 0) return;
LinkedListNode<ConsoleRow> current = _rows.Last;
// The following method assumes at least one row needs initialisation:
if (current.Value.Initialized) return;
while (!current.Value.Initialized)
{
if (current.Previous == null) break;
current = current.Previous;
}
// The current is now at the top of the uninitialised rows:
int height = 0;
if (current.Previous != null) height = current.Previous.Value.CumulativeEstimatedHeight;
while (current != null)
{
current.Value.Initialize(directText, _defaultFont);
current.Value.Initialized = true;
height += current.Value.GetEstimatedHeight(width);
current.Value.CumulativeEstimatedHeight = height;
current = current.Next;
}
}
void EnsureEstimated(DirectText directText, int width)
{
if (_estimatedForWidth != width)
{
_estimatedForWidth = width;
int height = 0;
foreach (ConsoleRow row in _rows)
{
height += row.GetEstimatedHeight(_estimatedForWidth);
row.CumulativeEstimatedHeight = height;
}
}
}
protected override void OnPaint(PaintEventArgs e)
{
using (DirectText directText = new DirectText(e.Graphics))
{
int width = Width - _scrollBarWidth;
InitializeNewRows(directText, width);
EnsureEstimated(directText, width);
if (_scrollToBottom)
{
_offset = GetLastOffset();
_scrollToBottom = false;
}
UpdateScrollBar();
int top = 0;
LinkedListNode<ConsoleRow> current = _offset;
while (current != null && top < Height)
{
int height = current.Value.GetHeight(directText, _defaultFont, width);
current.Value.Paint(e.Graphics, directText, _defaultFont, top, width);
top += height;
current = current.Next;
}
if (0 <= top && top < Height)
{
e.Graphics.FillRectangle(SystemBrushes.Window, new Rectangle(0, top, width, Height - top));
}
}
}
public override void Initialize(DirectText directText, Font defaultFont)
{
}
public override int GetHeight(DirectText directText, Font defaultFont, int width)
{
return _height;
}