| public SetUnderline ( int startIndex, int count ) : void | ||
| startIndex | int | Start index of the first character to underline. |
| count | int | The number of characters to underline. |
| return | void | |
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.SetColor(Colors.DarkGreen);
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);
}
internal override void Apply(TextLayout la)
{
la.SetUnderline (StartIndex, Count);
}