/// <summary>
/// Raises the DrawContents event.
/// </summary>
/// <param name="screen">screen where the window is redrawn</param>
/// <param name="hasFocus">true if the window is in application focus</param>
///
protected override void OnDrawContents(Screen screen, bool hasFocus)
{
if (screen == null)
{
return;
}
// Setup item colors for header
//
if (hasFocus)
{
screen.BackColor = HeaderBackColor;
screen.ForeColor = HeaderForeColor;
}
else
{
screen.BackColor = HeaderBackColorInact;
screen.ForeColor = HeaderForeColorInact;
}
// Draw header
//
for (int row = 0; row < HeaderHeight; ++row)
{
string text = Header[row];
if (text == WideDivider) // 'wide'-divider drawn in border
{
continue;
}
else if (text == ShortDivider) // 'short'-divider
{
text = string.Empty.PadRight(ClientWidth, '─');
}
text = TaggedText.AlignedText(text, ClientWidth,
TextAlign.Left, HorizontalPadding, HorizontalPadding);
screen.CursorTop = row;
screen.CursorLeft = 0;
screen.Write(text);
}
// Visible rows belongs to half-open range [ startRow, lastRow )
//
int startRow = Math.Max(0, ViewFrom);
int lastRow = Math.Min(ItemCount, ViewFrom + ViewHeight);
for (int row = startRow; row < lastRow; ++row)
{
string text = row >= Items.Count ? string.Empty : Items[row].Text;
text = TaggedText.AlignedText(text, ClientWidth,
TextAlign.Left, HorizontalPadding, HorizontalPadding);
// Setup item colors
//
if (hasFocus)
{
if (row == CurrentItem)
{
screen.BackColor = CurrentRowBackColor;
screen.ForeColor = CurrentRowForeColor;
}
else
{
screen.BackColor = BackColor;
screen.ForeColor = ForeColor;
}
}
else if (row == CurrentItem)
{
screen.BackColor = CurrentRowBackColorInact;
screen.ForeColor = CurrentRowForeColorInact;
}
else
{
screen.BackColor = BackColorInact;
screen.ForeColor = ForeColorInact;
}
screen.CursorTop = HeaderHeight + row - ViewFrom;
screen.CursorLeft = 0;
screen.Write(text);
}
// Setup item colors for footer
//
if (hasFocus)
{
screen.BackColor = FooterBackColor;
screen.ForeColor = FooterForeColor;
}
else
{
screen.BackColor = FooterBackColorInact;
screen.ForeColor = FooterForeColorInact;
}
// Draw footer
//
for (int row = 0; row < FooterHeight; ++row)
{
string text = Footer[row];
if (text == WideDivider) // 'wide'-divider drawn in border
{
continue;
}
else if (text == ShortDivider) // 'short'-divider
{
text = string.Empty.PadRight(ClientWidth, '─');
}
text = TaggedText.AlignedText(text, ClientWidth,
TextAlign.Left, HorizontalPadding, HorizontalPadding);
screen.CursorTop = ClientHeight - FooterHeight + row;
screen.CursorLeft = 0;
screen.Write(text);
}
base.OnDrawContents(screen, hasFocus);
}
/////////////////////////////////////////////////////////////////////////////////
/// <summary>
/// Draws default border, caption and scroll bar for the window.
/// </summary>
/// <remarks>
/// Border is drawn depending on Border, Caption and VerticalScrollBar flags:
/// <pre>
/// No Border With Border With Border
/// and Caption
///
/// Without Scrollbar: ┌──────────────┐
/// │██████████████│
/// ┌──────────────┐ ├──────────────┤
/// ▒▒▒▒▒▒▒▒▒▒▒▒▒▒ │▒▒▒▒▒▒▒▒▒▒▒▒▒▒│ │▒▒▒▒▒▒▒▒▒▒▒▒▒▒│
/// ▒▒▒▒▒▒▒▒▒▒▒▒▒▒ │▒▒▒▒▒▒▒▒▒▒▒▒▒▒│ │▒▒▒▒▒▒▒▒▒▒▒▒▒▒│
/// ▒▒▒▒▒▒▒▒▒▒▒▒▒▒ │▒▒▒▒▒▒▒▒▒▒▒▒▒▒│ │▒▒▒▒▒▒▒▒▒▒▒▒▒▒│
/// └──────────────┘ └──────────────┘
///
/// With Scrollbar: ┌──────────────┐
/// │██████████████│
/// ┌────────────┬─┐ ├────────────┬─┤
/// ▒▒▒▒▒▒▒▒▒▒▒▒│▲ │▒▒▒▒▒▒▒▒▒▒▒▒│▲│ │▒▒▒▒▒▒▒▒▒▒▒▒│▲│
/// ▒▒▒▒▒▒▒▒▒▒▒▒│█ │▒▒▒▒▒▒▒▒▒▒▒▒│█│ │▒▒▒▒▒▒▒▒▒▒▒▒│█│
/// ▒▒▒▒▒▒▒▒▒▒▒▒│▼ │▒▒▒▒▒▒▒▒▒▒▒▒│▼│ │▒▒▒▒▒▒▒▒▒▒▒▒│▼│
/// └────────────┴─┘ └────────────┴─┘
/// </pre>
///
/// 3D-shadow of the border might be drawn using:
/// <code>
///
/// screen.SetColors( Left + 1, Top + Height + 1, Width + 2, 1,
/// Color.Black, Color.Black );
///
/// screen.SetColors( Left + Width + 1, Top + 1, 2, Height,
/// Color.Black, Color.Black );
///
/// </code>
///
/// </remarks>
///
public void DefaultDrawBorder(Screen screen, bool hasFocus)
{
ColorContext savedColors = new ColorContext(screen);
bool hasScrollbar = VerticalScrollBar && Height >= 2 && Width >= 3;
if (Border && !CaptionVisible)
{
// Draw normal window border without caption but with optional
// border margin
//
screen.DrawRectangle(-1, -1, Width + 2, Height + 2);
}
else if (Border)
{
// Draw expanded window border for caption
//
screen.DrawRectangle(-1, -3, Width + 2, Height + 4);
// Draw separator between window contents and caption
//
screen.Put(-1, -1, Box._UDsR);
screen.Put(Width, -1, Box._UDLs);
screen.DrawRectangle(0, -1, Width, 1);
}
// Draw vertical scrollbar with optional frame
//
if (hasScrollbar)
{
int reducedWidth = Width - 2;
// Draw separator between window contents and scroll bar
//
if (Border)
{
screen.DrawRectangle(reducedWidth, 0, 1, Height);
screen.Put(reducedWidth, -1, Box._sDLR);
screen.Put(reducedWidth, Height, Box._UsLR);
}
else
{
screen.DrawRectangle(reducedWidth, 0, 1, Height);
screen.DrawRectangle(reducedWidth + 2, 0, 1, Height);
}
// Draw vertical scroll bar
if (hasFocus)
{
screen.ForeColor = ScrollBarForeColor;
}
else
{
screen.ForeColor = ScrollBarForeColorInact;
}
screen.DrawVerticalScrollBar(reducedWidth + 1, 0, Height,
VerticalScrollBarFirstItem, VerticalScrollBarLastItem,
VerticalScrollBarItemCount);
}
// Write caption
//
if (Border & CaptionVisible & Caption != null)
{
if (hasFocus)
{
screen.BackColor = CaptionBackColor;
screen.ForeColor = CaptionForeColor;
}
else
{
screen.BackColor = CaptionBackColorInact;
screen.ForeColor = CaptionForeColorInact;
}
string text = TaggedText.AlignedText(Caption, Width,
CaptionTextAlign, CaptionIndent, CaptionIndent);
screen.CursorTop = -2;
screen.CursorLeft = 0;
screen.Write(text);
}
savedColors.Restore();
}