static void HighlightSearchResults (TextLayout layout, string search, Color foreground, Color background)
{
string text = null;
if (layout != null) {
text = layout.Text;
layout.ClearAttributes ();
}
if (string.IsNullOrEmpty (text) || string.IsNullOrEmpty (search))
return;
int index = 0;
while ((index = text.IndexOf (search, index, StringComparison.OrdinalIgnoreCase)) > -1) {
layout.SetForeground (foreground, index, search.Length);
layout.SetBackground (background, index, search.Length);
index++;
}
}
int DrawLinePortion(Context cr, ChunkStyle style, TextLayout layout, DocumentLine line, int visualOffset, int logicalLength)
{
int logicalColumn = line.GetLogicalColumn(editor, visualOffset);
int logicalEndColumn = logicalColumn + logicalLength;
int visualEndOffset = line.GetVisualColumn(editor, logicalEndColumn);
int visualLength = visualEndOffset - visualOffset;
int indexOffset = visualOffset - 1;
layout.SetFontStyle(style.FontStyle, indexOffset, visualLength);
layout.SetFontWeight(style.FontWeight, indexOffset, visualLength);
if (style.Underline)
{
layout.SetUnderline(indexOffset, visualLength);
}
layout.SetForeground(style.Foreground, indexOffset, visualLength);
return(visualEndOffset);
}
public virtual void Texts(Xwt.Drawing.Context ctx, double x, double y)
{
ctx.Save();
ctx.Translate(x, y);
ctx.SetColor(Colors.Black);
var col1 = new Rectangle();
var col2 = new Rectangle();
var text = new TextLayout();
text.Font = this.Font.WithSize(24);
Console.WriteLine(text.Font.Size);
// first text
text.Text = "Lorem ipsum dolor sit amet,";
var size1 = text.GetSize();
col1.Width = size1.Width;
col1.Height += size1.Height + 10;
ctx.DrawTextLayout(text, 0, 0);
// proofing width; test should align with text above
ctx.SetColor(Colors.DarkMagenta);
text.Text = "consetetur sadipscing elitr, sed diam nonumy";
text.Width = col1.Width;
var size2 = text.GetSize();
ctx.DrawTextLayout(text, 0, col1.Bottom);
col1.Height += size2.Height + 10;
ctx.SetColor(Colors.Black);
// proofing scale, on second col
ctx.Save();
ctx.SetColor(Colors.Red);
col2.Left = col1.Right + 10;
text.Text = "eirmod tempor invidunt ut.";
var scale = 1.2;
text.Width = text.Width / scale;
var size3 = text.GetSize();
col2.Height = size3.Height * scale;
col2.Width = size3.Width * scale + 5;
ctx.Scale(scale, scale);
ctx.DrawTextLayout(text, col2.Left / scale, col2.Top / scale);
ctx.Restore();
// proofing heigth, on second col
ctx.Save();
ctx.SetColor(Colors.DarkCyan);
text.Text = "Praesent ac lacus nec dolor pulvinar feugiat a id elit.";
var size4 = text.GetSize();
text.Height = size4.Height / 2;
text.Trimming = TextTrimming.WordElipsis;
ctx.DrawTextLayout(text, col2.Left, col2.Bottom + 5);
ctx.SetLineWidth(1);
ctx.SetColor(Colors.Blue);
ctx.Rectangle(new Rectangle(col2.Left, col2.Bottom + 5, text.Width, text.Height));
ctx.Stroke();
ctx.Restore();
// drawing col line
ctx.SetLineWidth(1);
ctx.SetColor(Colors.Black.WithAlpha(.5));
ctx.MoveTo(col1.Right + 5, col1.Top);
ctx.LineTo(col1.Right + 5, col1.Bottom);
ctx.Stroke();
ctx.MoveTo(col2.Right + 5, col2.Top);
ctx.LineTo(col2.Right + 5, col2.Bottom);
ctx.Stroke();
ctx.SetColor(Colors.Black);
// proofing rotate, and printing size to see the values
ctx.Save();
text.Font = this.Font.WithSize(10);
text.Text = string.Format("Size 1 {0}\r\nSize 2 {1}\r\nSize 3 {2} Scale {3}",
size1, size2, size3, scale);
text.Width = -1; // this clears textsize
text.Height = -1;
ctx.Rotate(5);
// maybe someone knows a formula with angle and textsize to calculyte ty
var ty = 30;
ctx.DrawTextLayout(text, ty, col1.Bottom + 10);
ctx.Restore();
// scale example here:
ctx.Restore();
TextLayout tl0 = new TextLayout(this);
tl0.Font = this.Font.WithSize(10);
tl0.Text = "This text contains attributes.";
tl0.SetUnderline(0, "This".Length);
tl0.SetForeground(new Color(0, 1.0, 1.0), "This ".Length, "text".Length);
tl0.SetBackground(new Color(0, 0, 0), "This ".Length, "text".Length);
tl0.SetFontWeight(FontWeight.Bold, "This text ".Length, "contains".Length);
tl0.SetFontStyle(FontStyle.Italic, "This text ".Length, "contains".Length);
tl0.SetStrikethrough("This text contains ".Length, "attributes".Length);
ctx.DrawTextLayout(tl0, col2.Left, col2.Bottom + 100);
// Text boces
y = 180;
// Without wrapping
TextLayout tl = new TextLayout(this);
tl.Text = "Stright text";
DrawText(ctx, tl, ref y);
// With wrapping
tl = new TextLayout(this);
tl.Text = "The quick brown fox jumps over the lazy dog";
tl.Width = 100;
DrawText(ctx, tl, ref y);
// With blank lines
tl = new TextLayout(this);
tl.Text = "\nEmpty line above\nLine break above\n\nEmpty line above\n\n\nTwo empty lines above\nEmpty line below\n";
tl.Width = 200;
DrawText(ctx, tl, ref y);
}