internal void DrawItem(SKCanvas canvas)
{
if (Selected)
{
canvas.FillRectangle(Bounds, Theme.RibbonItemHighlightColor);
}
var image_size = LogicalToDeviceUnits(32);
var image_area = new Rectangle(Bounds.Left, Bounds.Top, Bounds.Width, Bounds.Width);
var image_bounds = DrawingExtensions.CenterSquare(image_area, image_size);
image_bounds.Y = Bounds.Top + LogicalToDeviceUnits(3);
if (Image != null)
{
canvas.DrawBitmap(Image, image_bounds);
}
if (!string.IsNullOrWhiteSpace(Text))
{
var font_size = LogicalToDeviceUnits(Theme.RibbonItemFontSize);
canvas.Save();
canvas.Clip(Bounds);
var text_bounds = new Rectangle(Bounds.Left, image_bounds.Bottom + LogicalToDeviceUnits(3), Bounds.Width, Bounds.Bottom - image_bounds.Bottom - LogicalToDeviceUnits(3));
canvas.DrawText(Text, Theme.UIFont, font_size, text_bounds, Theme.DarkTextColor, ContentAlignment.MiddleCenter);
canvas.Restore();
}
}
/// <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 static void DrawCharacters (this SKCanvas canvas, string text, SKTypeface font, int fontsize, int x, int y, SKColor color)
//{
// var emoji = StringUtilities.GetUnicodeCharacterCode ("🚀", SKTextEncoding.Utf32);
// font = SKFontManager.Default.MatchCharacter ('c');
// font.
// using (var paint = CreateTextPaint (font, fontsize, color)) {
// var ranges = TextMeasurer.MeasureCharacters (text, font, fontsize, x, y);
// var x_float = (float)x;
// // if (SKTypeface.Default.)
// canvas.DrawText (text, x_float, y, paint);
// //for (var i = 0; i < text.Length - 1; i++) {
// // x_float = ranges[i].X;
// //}
// }
//}
public static void DrawText(this SKCanvas canvas, string text, SKTypeface font, int fontsize, Rectangle bounds, SKColor color, ContentAlignment alignment)
{
if (string.IsNullOrWhiteSpace(text))
{
return;
}
using var paint = CreateTextPaint(font, fontsize, color);
var font_height = new SKRect();
paint.MeasureText(text, ref font_height);
// See how many lines we can fit if needed
var line_count = bounds.Height / font_height.Height;
var vertical_align = GetVerticalAlign(alignment);
var y = bounds.Top + (int)font_height.Height;
if (vertical_align == SKTextAlign.Center)
{
var center_bounds = bounds.Top + (bounds.Height / 2);
var text_center = (font_height.Top + font_height.Bottom) / 2;
y = (int)(center_bounds - text_center);
}
else if (vertical_align == SKTextAlign.Right)
{
y = bounds.Bottom - (int)font_height.Bottom - 1;
}
canvas.Save();
canvas.Clip(bounds);
bounds.Y = y;
canvas.DrawTextLine(text, bounds, paint, alignment);
canvas.Restore();
}