/// <summary>
/// Draws a string of text.
/// </summary>
public static void DrawText(this SKCanvas canvas, string text, SKTypeface font, int fontSize, Rectangle bounds, SKColor color, ContentAlignment alignment, int selectionStart = -1, int selectionEnd = -1, SKColor?selectionColor = null, int?maxLines = null, bool ellipsis = false)
{
if (string.IsNullOrWhiteSpace(text))
{
return;
}
var tb = TextMeasurer.CreateTextBlock(text, font, fontSize, bounds.Size, TextMeasurer.GetTextAlign(alignment), color, maxLines, ellipsis);
var location = bounds.Location;
var vertical = TextMeasurer.GetVerticalAlign(alignment);
if (vertical == SKTextAlign.Right)
{
location.Y = bounds.Bottom - (int)tb.MeasuredHeight;
}
else if (vertical == SKTextAlign.Center)
{
location.Y += (bounds.Height - (int)tb.MeasuredHeight) / 2;
}
var options = CreateOptions();
if (selectionStart >= 0 && selectionEnd >= 0 && selectionStart != selectionEnd)
{
options.Selection = new TextRange(selectionStart, selectionEnd);
options.SelectionColor = selectionColor ?? SKColors.Blue;
}
canvas.Save();
canvas.Clip(bounds);
tb.Paint(canvas, new SKPoint(location.X, location.Y), options);
canvas.Restore();
}
public Size GetPreferredSize(Size proposedSize)
{
var padding = Parent?.LogicalToDeviceUnits(Padding.Horizontal) ?? Padding.Horizontal;
var font_size = Parent?.LogicalToDeviceUnits(Theme.FontSize) ?? Theme.FontSize;
var text_size = (int)Math.Round(TextMeasurer.MeasureText(Text, Theme.UIFont, font_size));
return(new Size(text_size + padding, Bounds.Height));
}
public virtual Size GetPreferredSize(Size proposedSize)
{
var owner = OwnerControl;
if (owner is Menu menu)
{
var padding = menu.LogicalToDeviceUnits(Padding.Horizontal);
var font_size = menu.LogicalToDeviceUnits(Theme.FontSize);
var text_size = (int)Math.Round(TextMeasurer.MeasureText(Text, Theme.UIFont, font_size).Width);
return(new Size(text_size + padding, Bounds.Height));
}
if (owner is ToolBar bar)
{
var width = bar.LogicalToDeviceUnits(Padding.Horizontal);
var font_size = bar.LogicalToDeviceUnits(Theme.FontSize);
width += (int)Math.Round(TextMeasurer.MeasureText(Text, Theme.UIFont, font_size).Width);
if (!(Image is null))
{
width += bar.LogicalToDeviceUnits(20);
}
if (HasItems)
{
width += bar.LogicalToDeviceUnits(14);
}
return(new Size(width, Bounds.Height));
}
if (owner is MenuDropDown dropdown)
{
var padding = dropdown.LogicalToDeviceUnits(Padding);
var font_size = dropdown.LogicalToDeviceUnits(Theme.FontSize);
var text_size = TextMeasurer.MeasureText(Text, Theme.UIFont, font_size);
return(new Size((int)Math.Round(text_size.Width, 0, MidpointRounding.AwayFromZero) + padding.Horizontal + dropdown.LogicalToDeviceUnits(70), (int)Math.Round(text_size.Height, 0, MidpointRounding.AwayFromZero) + dropdown.LogicalToDeviceUnits(8)));
}
return(proposedSize);
}
