63 lines
1.5 KiB
C#
63 lines
1.5 KiB
C#
using System.Windows.Forms;
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using System.Globalization;
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namespace BizHawk.Client.EmuHawk
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{
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// http://msdn.microsoft.com/en-us/library/ms229644%28v=vs.80%29.aspx
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public class NumericTextBox : TextBox
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{
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// Restricts the entry of characters to digits (including hex), the negative sign,
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// the decimal point, and editing keystrokes (backspace).
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protected override void OnKeyPress(KeyPressEventArgs e)
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{
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base.OnKeyPress(e);
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var numberFormatInfo = CultureInfo.CurrentCulture.NumberFormat;
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string decimalSeparator = numberFormatInfo.NumberDecimalSeparator;
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string groupSeparator = numberFormatInfo.NumberGroupSeparator;
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string negativeSign = numberFormatInfo.NegativeSign;
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string keyInput = e.KeyChar.ToString();
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if (char.IsDigit(e.KeyChar))
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{
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// Digits are OK
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}
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else if (keyInput.Equals(decimalSeparator) && AllowDecimal)
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{
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// Decimal separator is OK
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}
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else if (keyInput.Equals(negativeSign) && AllowNegative)
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{
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// Negative is OK
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}
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else if (keyInput.Equals(groupSeparator))
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{
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// group separator is ok
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}
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else if (e.KeyChar == '\b')
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{
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// Backspace key is OK
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}
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else if (AllowSpace && e.KeyChar == ' ')
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{
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}
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else
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{
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// Swallow this invalid key and beep
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e.Handled = true;
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// MessageBeep();
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}
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}
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public int IntValue => int.Parse(Text);
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public bool AllowSpace { get; set; }
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public bool AllowDecimal { get; set; }
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public bool AllowNegative { get; set; }
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}
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}
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