86 lines
2.4 KiB
C#
86 lines
2.4 KiB
C#
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using System;
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namespace Gwen.Control
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{
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/// <summary>
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/// Numeric text box - accepts only float numbers.
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/// </summary>
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public class TextBoxNumeric : TextBox
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{
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/// <summary>
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/// Current numeric value.
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/// </summary>
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protected float m_Value;
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/// <summary>
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/// Initializes a new instance of the <see cref="TextBoxNumeric"/> class.
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/// </summary>
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/// <param name="parent">Parent control.</param>
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public TextBoxNumeric(Base parent)
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: base(parent)
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{
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SetText("0", false);
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}
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protected virtual bool IsTextAllowed(String str)
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{
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if (str == "" || str == "-")
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return true; // annoying if single - is not allowed
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float d;
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return float.TryParse(str, out d);
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}
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/// <summary>
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/// Determines whether the control can insert text at a given cursor position.
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/// </summary>
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/// <param name="text">Text to check.</param>
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/// <param name="position">Cursor position.</param>
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/// <returns>True if allowed.</returns>
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protected override bool IsTextAllowed(String text, int position)
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{
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String newText = Text.Insert(position, text);
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return IsTextAllowed(newText);
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}
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/// <summary>
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/// Current numerical value.
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/// </summary>
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public virtual float Value
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{
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get { return m_Value; }
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set
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{
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m_Value = value;
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Text = value.ToString();
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}
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}
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// text -> value
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/// <summary>
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/// Handler for text changed event.
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/// </summary>
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protected override void OnTextChanged()
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{
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if (String.IsNullOrEmpty(Text) || Text == "-")
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{
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m_Value = 0;
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//SetText("0");
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}
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else
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m_Value = float.Parse(Text);
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base.OnTextChanged();
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}
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/// <summary>
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/// Sets the control text.
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/// </summary>
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/// <param name="str">Text to set.</param>
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/// <param name="doEvents">Determines whether to invoke "text changed" event.</param>
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public override void SetText(string str, bool doEvents = true)
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{
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if (IsTextAllowed(str))
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base.SetText(str, doEvents);
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}
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}
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}
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