diff options
Diffstat (limited to 'Plugins/MonoGame.Extended/source/MonoGame.Extended.Gui/Controls/TextBox2.cs')
| -rw-r--r-- | Plugins/MonoGame.Extended/source/MonoGame.Extended.Gui/Controls/TextBox2.cs | 328 |
1 files changed, 328 insertions, 0 deletions
diff --git a/Plugins/MonoGame.Extended/source/MonoGame.Extended.Gui/Controls/TextBox2.cs b/Plugins/MonoGame.Extended/source/MonoGame.Extended.Gui/Controls/TextBox2.cs new file mode 100644 index 0000000..e20b621 --- /dev/null +++ b/Plugins/MonoGame.Extended/source/MonoGame.Extended.Gui/Controls/TextBox2.cs @@ -0,0 +1,328 @@ +using System.Collections.Generic; +using System.Linq; +using System.Text; +using Microsoft.Xna.Framework; +using Microsoft.Xna.Framework.Input; +using MonoGame.Extended.Input.InputListeners; + +namespace MonoGame.Extended.Gui.Controls +{ + public class TextBox2 : Control + { + public TextBox2() + : this(null) + { + } + + public TextBox2(string text) + { + Text = text ?? string.Empty; + HorizontalTextAlignment = HorizontalAlignment.Left; + VerticalTextAlignment = VerticalAlignment.Top; + } + + + private const float _caretBlinkRate = 0.53f; + private float _nextCaretBlink = _caretBlinkRate; + private bool _isCaretVisible = true; + + private readonly List<StringBuilder> _lines = new List<StringBuilder>(); + public string Text + { + get => string.Concat(_lines.SelectMany(s => $"{s}\n")); + set + { + _lines.Clear(); + + var line = new StringBuilder(); + + for (var i = 0; i < value.Length; i++) + { + var c = value[i]; + + if (c == '\n') + { + _lines.Add(line); + line = new StringBuilder(); + } + else if(c != '\r') + { + line.Append(c); + } + } + + _lines.Add(line); + } + } + + public int CaretIndex => ColumnIndex * LineIndex + ColumnIndex; + public int LineIndex { get; set; } + public int ColumnIndex { get; set; } + public int TabStops { get; set; } = 4; + + public override IEnumerable<Control> Children => Enumerable.Empty<Control>(); + + public string GetLineText(int lineIndex) => _lines[lineIndex].ToString(); + public int GetLineLength(int lineIndex) => _lines[lineIndex].Length; + + public override Size GetContentSize(IGuiContext context) + { + var font = Font ?? context.DefaultFont; + var stringSize = (Size)font.MeasureString(Text ?? string.Empty); + return new Size(stringSize.Width, stringSize.Height < font.LineHeight ? font.LineHeight : stringSize.Height); + } + + public override bool OnKeyPressed(IGuiContext context, KeyboardEventArgs args) + { + switch (args.Key) + { + case Keys.Tab: + Tab(); + break; + case Keys.Back: + Backspace(); + break; + case Keys.Delete: + Delete(); + break; + case Keys.Left: + Left(); + break; + case Keys.Right: + Right(); + break; + case Keys.Up: + Up(); + break; + case Keys.Down: + Down(); + break; + case Keys.Home: + Home(); + break; + case Keys.End: + End(); + break; + case Keys.Enter: + Type('\n'); + return true; + default: + if (args.Character.HasValue) + Type(args.Character.Value); + + break; + } + + _isCaretVisible = true; + return base.OnKeyPressed(context, args); + } + + public void Type(char c) + { + switch (c) + { + case '\n': + var lineText = GetLineText(LineIndex); + var left = lineText.Substring(0, ColumnIndex); + var right = lineText.Substring(ColumnIndex); + _lines.Insert(LineIndex + 1, new StringBuilder(right)); + _lines[LineIndex] = new StringBuilder(left); + LineIndex++; + Home(); + break; + case '\t': + Tab(); + break; + default: + _lines[LineIndex].Insert(ColumnIndex, c); + ColumnIndex++; + break; + } + } + + public void Backspace() + { + if (ColumnIndex == 0 && LineIndex > 0) + { + var topLineLength = GetLineLength(LineIndex - 1); + + if (RemoveLineBreak(LineIndex - 1)) + { + LineIndex--; + ColumnIndex = topLineLength; + } + } + else if (Left()) + { + RemoveCharacter(LineIndex, ColumnIndex); + } + } + + public void Delete() + { + var lineLength = GetLineLength(LineIndex); + + if (ColumnIndex == lineLength) + RemoveLineBreak(LineIndex); + else + RemoveCharacter(LineIndex, ColumnIndex); + } + + public void RemoveCharacter(int lineIndex, int columnIndex) + { + _lines[lineIndex].Remove(columnIndex, 1); + } + + public bool RemoveLineBreak(int lineIndex) + { + if (lineIndex < _lines.Count - 1) + { + var topLine = _lines[lineIndex]; + var bottomLine = _lines[lineIndex + 1]; + _lines.RemoveAt(lineIndex + 1); + topLine.Append(bottomLine); + return true; + } + + return false; + } + + public bool Home() + { + ColumnIndex = 0; + return true; + } + + public bool End() + { + ColumnIndex = GetLineLength(LineIndex); + return true; + } + + public bool Up() + { + if (LineIndex > 0) + { + LineIndex--; + + if (ColumnIndex > GetLineLength(LineIndex)) + ColumnIndex = GetLineLength(LineIndex); + + return true; + } + + return false; + } + + public bool Down() + { + if (LineIndex < _lines.Count - 1) + { + LineIndex++; + + if (ColumnIndex > GetLineLength(LineIndex)) + ColumnIndex = GetLineLength(LineIndex); + + return true; + } + + return false; + } + + public bool Left() + { + if (ColumnIndex == 0) + { + if (LineIndex == 0) + return false; + + LineIndex--; + ColumnIndex = GetLineLength(LineIndex); + } + else + { + ColumnIndex--; + } + + return true; + } + + public bool Right() + { + if (ColumnIndex == _lines[LineIndex].Length) + { + if (LineIndex == _lines.Count - 1) + return false; + + LineIndex++; + ColumnIndex = 0; + } + else + { + ColumnIndex++; + } + + return true; + } + + public bool Tab() + { + var spaces = TabStops - ColumnIndex % TabStops; + + for (var s = 0; s < spaces; s++) + Type(' '); + + return spaces > 0; + } + + public override void Draw(IGuiContext context, IGuiRenderer renderer, float deltaSeconds) + { + base.Draw(context, renderer, deltaSeconds); + + var text = Text; + var textInfo = GetTextInfo(context, text, ContentRectangle, HorizontalTextAlignment, VerticalTextAlignment); + + if (!string.IsNullOrWhiteSpace(textInfo.Text)) + renderer.DrawText(textInfo.Font, textInfo.Text, textInfo.Position + TextOffset, textInfo.Color, textInfo.ClippingRectangle); + + if (IsFocused) + { + var caretRectangle = GetCaretRectangle(textInfo); + + if (_isCaretVisible) + renderer.DrawRectangle(caretRectangle, TextColor); + + _nextCaretBlink -= deltaSeconds; + + if (_nextCaretBlink <= 0) + { + _isCaretVisible = !_isCaretVisible; + _nextCaretBlink = _caretBlinkRate; + } + } + } + + private Rectangle GetCaretRectangle(TextInfo textInfo) + { + var font = textInfo.Font; + var text = GetLineText(LineIndex); + var offset = new Vector2(0, font.LineHeight * LineIndex); + var caretRectangle = font.GetStringRectangle(text.Substring(0, ColumnIndex), textInfo.Position + offset); + + // TODO: Finish the caret position stuff when it's outside the clipping rectangle + if (caretRectangle.Right > ClippingRectangle.Right) + textInfo.Position.X -= caretRectangle.Right - ClippingRectangle.Right; + + caretRectangle.X = caretRectangle.Right < ClippingRectangle.Right ? caretRectangle.Right : ClippingRectangle.Right; + caretRectangle.Width = 1; + + if (caretRectangle.Left < ClippingRectangle.Left) + { + textInfo.Position.X += ClippingRectangle.Left - caretRectangle.Left; + caretRectangle.X = ClippingRectangle.Left; + } + + return (Rectangle)caretRectangle; + } + } +}
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