/// <inheritdoc/>
protected override void OnRender(UIRenderContext context)
{
// Make sure the layout is up-to-date.
UpdateLayout();
var originalScissorRectangle = Renderer.GraphicsDevice.ScissorRectangle;
// The renderer uses scissor test. We need to set a default rectangle.
// (In MonoGame with OpenGL, the default scissor rectangle might not cover the full screen.)
Renderer.GraphicsDevice.ScissorRectangle = ActualBounds.ToRectangle(true);
// Start the rendering process.
Renderer.BeginBatch();
Renderer.Render(this, context);
Renderer.EndBatch();
Renderer.GraphicsDevice.ScissorRectangle = originalScissorRectangle;
}
/// <inheritdoc/>
protected override void OnRender(UIRenderContext context)
{
if (!IsVisualValid)
{
// ----- Store VisualLines as info for the renderer.
int lineCount = _wrappedLines.Count; // The total number of lines.
int startLine = ComputeStartWrappedLine(); // The index of the first visual line.
int endLine = Math.Min(lineCount, startLine + _numberOfLines); // The exclusive end line.
VisualLines.Clear();
for (int i = startLine; i < endLine; i++)
VisualLines.Add(_wrappedLines[i]);
// ----- Determine the position for the caret line.
// The number of lines for the wrapped current text.
int numberOfLinesInCurrentText = (int)Math.Ceiling((float)(Prompt.Length + Text.Length) / _numberOfColumns);
// The line index of the cursor relative to the wrapped current text.
int cursorLineInCurrentText = (Prompt.Length + CaretIndex) / _numberOfColumns;
// If the cursor is exactly in the last column of the last line, then it should not skip
// to the next line (because there is no VisualLine for that).
if (cursorLineInCurrentText * _numberOfColumns == (Prompt.Length + Text.Length))
cursorLineInCurrentText--;
// The line index of the cursor relative to startLine.
VisualCaretY = lineCount - numberOfLinesInCurrentText + cursorLineInCurrentText - startLine;
// The column index of the cursor.
VisualCaretX = Prompt.Length + CaretIndex - cursorLineInCurrentText * _numberOfColumns;
if (VisualCaretY < 0 || VisualCaretY >= _numberOfLines)
VisualCaretX = VisualCaretY = -1;
}
base.OnRender(context);
}
