protected override void OnRender(DrawingContext ctx)
{
ctx.FillRectangle(Brushes.Green, new Rect(0, 0, Width, Height));
var rc = new Rect(0, 0, Width/3, Height/3);
using (ctx.PushPostTransform(
Perspex.Matrix.CreateTranslation(-Width/6, -Width/6)*
Perspex.Matrix.CreateRotation(_radians)*
Perspex.Matrix.CreateTranslation(Width/2, Height/2)))
{
ctx.FillRectangle(new LinearGradientBrush()
{
GradientStops =
{
new GradientStop() {Color = Colors.Blue},
new GradientStop(Colors.Red, 1)
}
}, rc, 5);
}
}
/// <summary>
/// Renders the visual to a <see cref="DrawingContext"/>.
/// </summary>
/// <param name="context">The drawing context.</param>
public override void Render(DrawingContext context)
{
Brush background = Background;
if (background != null)
{
var renderSize = Bounds.Size;
context.FillRectangle(background, new Rect(renderSize));
}
base.Render(context);
}
/// <summary>
/// Renders the control.
/// </summary>
/// <param name="context">The drawing context.</param>
public override void Render(DrawingContext context)
{
var background = Background;
var borderBrush = BorderBrush;
var borderThickness = BorderThickness;
var cornerRadius = CornerRadius;
var rect = new Rect(Bounds.Size).Deflate(BorderThickness);
if (background != null)
{
context.FillRectangle(background, rect, cornerRadius);
}
if (borderBrush != null && borderThickness > 0)
{
context.DrawRectangle(new Pen(borderBrush, borderThickness), rect, cornerRadius);
}
}
public override void Render(DrawingContext context)
{
var selectionStart = SelectionStart;
var selectionEnd = SelectionEnd;
if (selectionStart != selectionEnd)
{
var start = Math.Min(selectionStart, selectionEnd);
var length = Math.Max(selectionStart, selectionEnd) - start;
var rects = FormattedText.HitTestTextRange(start, length);
var brush = new SolidColorBrush(0xff086f9e);
foreach (var rect in rects)
{
context.FillRectangle(brush, rect);
}
}
base.Render(context);
if (selectionStart == selectionEnd)
{
var charPos = FormattedText.HitTestTextPosition(CaretIndex);
var backgroundColor = (((Control)TemplatedParent).GetValue(BackgroundProperty) as SolidColorBrush)?.Color;
var caretBrush = Brushes.Black;
if(backgroundColor.HasValue)
{
byte red = (byte)~(backgroundColor.Value.R);
byte green = (byte)~(backgroundColor.Value.G);
byte blue = (byte)~(backgroundColor.Value.B);
caretBrush = new SolidColorBrush(Color.FromRgb(red, green, blue));
}
if (_caretBlink)
{
var x = Math.Floor(charPos.X) + 0.5;
var y = Math.Floor(charPos.Y) + 0.5;
var b = Math.Ceiling(charPos.Bottom) - 0.5;
context.DrawLine(
new Pen(caretBrush, 1),
new Point(x, y),
new Point(x, b));
}
}
}
/// <summary>
///
/// </summary>
/// <param name="dc"></param>
/// <param name="c"></param>
/// <param name="width"></param>
/// <param name="height"></param>
private void DrawBackground(DrawingContext dc, ArgbColor c, double width, double height)
{
var color = Color.FromArgb(c.A, c.R, c.G, c.B);
var brush = new SolidColorBrush(color);
var rect = new Rect(0, 0, width, height);
dc.FillRectangle(brush, rect);
// TODO: brush.Dispose();
}
/// <summary>
/// Renders the <see cref="TextBlock"/> to a drawing context.
/// </summary>
/// <param name="context">The drawing context.</param>
public override void Render(DrawingContext context)
{
Brush background = Background;
if (background != null)
{
context.FillRectangle(background, new Rect(Bounds.Size));
}
FormattedText.Constraint = Bounds.Size;
context.DrawText(Foreground, new Point(), FormattedText);
}
/// <summary>
///
/// </summary>
/// <param name="dc"></param>
/// <param name="container"></param>
private void DrawBackgroundInternal(DrawingContext dc, Container container)
{
Brush brush = ToSolidBrush(container.Background);
var rect = new Rect(0, 0, container.Width, container.Height);
dc.FillRectangle(brush, rect);
// TODO: brush.Dispose();
}
/// <summary>
///
/// </summary>
/// <param name="dc"></param>
/// <param name="brush"></param>
/// <param name="pen"></param>
/// <param name="isStroked"></param>
/// <param name="isFilled"></param>
/// <param name="rect"></param>
private static void DrawRectangleInternal(
DrawingContext dc,
Brush brush,
Pen pen,
bool isStroked,
bool isFilled,
ref Rect2 rect)
{
if (!isStroked && !isFilled)
return;
var r = new Rect(rect.X, rect.Y, rect.Width, rect.Height);
if (isFilled)
{
dc.FillRectangle(brush, r);
}
if (isStroked)
{
dc.DrawRectangle(pen, r);
}
}
private void DrawRoundRect(DrawingContext ctx)
{
ctx.FillRectangle(new SolidColorBrush(Colors.White),
new Rect(new Size(ClientSize.Width, ClientSize.Height)));
var rc = new Rect(0, 0, 60, 60);
var transform = GetTransform();
using (ctx.PushPostTransform(transform))
{
ctx.FillRectangle(new SolidColorBrush(Colors.Aqua), rc, 20);
ctx.DrawRectangle(new Pen(new SolidColorBrush(Colors.Magenta), 10), rc, 20);
}
}
