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++;
}
}
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);
}
protected override void OnDraw(Context ctx, Rectangle cellArea)
{
TextLayout layout = new TextLayout();
var node = GetValue(NodeField);
var status = GetViewStatus(node);
// Store the width, it will be used for calculating height in OnGetRequiredSize() when in expanded mode.
status.LastRenderWidth = cellArea.Width;
layout.Text = node.Text;
var textSize = layout.GetSize();
// Render the selection
if (selectionRow == node && selectionStart != selectionEnd)
{
layout.SetBackground(Colors.LightBlue, Math.Min(selectionStart, selectionEnd), Math.Abs(selectionEnd - selectionStart));
}
// Text doesn't fit. We need to render the expand icon
if (textSize.Width > cellArea.Width)
{
layout.Width = Math.Max(1, cellArea.Width - addImage.Width - MoreLinkSpacing);
if (!status.Expanded)
{
layout.Trimming = TextTrimming.WordElipsis;
}
else
{
textSize = layout.GetSize(); // The height may have changed. We need the real height since we check it at the end of the method
}
// Draw the text
ctx.DrawTextLayout(layout, cellArea.X, cellArea.Y);
// Draw the image
var imageRect = new Rectangle(cellArea.X + layout.Width + MoreLinkSpacing, cellArea.Y, addImage.Width, addImage.Height);
bool hover = pointerPosition != Point.Zero && imageRect.Contains(pointerPosition);
Image icon;
if (status.Expanded)
{
icon = hover ? removeImage : removeImageDisabled;
}
else
{
icon = hover ? addImage : addImageDisabled;
}
ctx.DrawImage(icon, imageRect.X, imageRect.Y);
}
else
{
ctx.DrawTextLayout(layout, cellArea.X, cellArea.Y);
}
// If the height required by the text is not the same as what was calculated in OnGetRequiredSize(), it means that
// the required height has changed. In that case call QueueResize(), so that OnGetRequiredSize() is called
// again and the row is properly resized.
if (status.Expanded && textSize.Height != status.LastCalculatedHeight)
{
QueueResize();
}
}