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660ba1bfb1
- More format limitations checking code
274 lines
7 KiB
C#
274 lines
7 KiB
C#
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#region ================== Copyright (c) 2007 Pascal vd Heiden
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/*
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* Copyright (c) 2007 Pascal vd Heiden, www.codeimp.com
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* This program is released under GNU General Public License
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#endregion
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#region ================== Namespaces
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using System;
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using System.Collections.Generic;
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using System.ComponentModel;
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using System.Drawing;
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using System.Text;
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using System.Globalization;
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using System.Windows.Forms;
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using CodeImp.DoomBuilder.Actions;
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using CodeImp.DoomBuilder.Geometry;
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using CodeImp.DoomBuilder.Rendering;
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using CodeImp.DoomBuilder.Editing;
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#endregion
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namespace CodeImp.DoomBuilder.Controls
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{
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public class NumericTextbox : AutoSelectTextbox
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{
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#region ================== Constants
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#endregion
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#region ================== Variables
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private bool allownegative = false; // Allow negative numbers
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private bool allowrelative = false; // Allow ++ and -- prefix for relative changes
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private bool allowdecimal = false; // Allow decimal (float) numbers
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private bool controlpressed = false;
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#endregion
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#region ================== Properties
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public bool AllowNegative { get { return allownegative; } set { allownegative = value; } }
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public bool AllowRelative { get { return allowrelative; } set { allowrelative = value; } }
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public bool AllowDecimal { get { return allowdecimal; } set { allowdecimal = value; } }
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#endregion
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#region ================== Constructor / Disposer
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// Constructor
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public NumericTextbox()
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{
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this.ImeMode = ImeMode.Off;
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}
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#endregion
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#region ================== Methods
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// Key pressed
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protected override void OnKeyDown(KeyEventArgs e)
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{
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controlpressed = e.Control;
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base.OnKeyDown(e);
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}
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// Key released
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protected override void OnKeyUp(KeyEventArgs e)
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{
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controlpressed = e.Control;
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base.OnKeyUp(e);
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}
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// When a key is pressed
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protected override void OnKeyPress(KeyPressEventArgs e)
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{
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string allowedchars = "0123456789\b";
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string nonselectedtext;
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string textpart;
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int selectionpos;
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int numprefixes;
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char otherprefix;
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// Determine allowed chars
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if(allownegative) allowedchars += CultureInfo.CurrentUICulture.NumberFormat.NegativeSign;
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if(allowrelative) allowedchars += "+-";
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if(controlpressed) allowedchars += "\u0018\u0003\u0016";
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if(allowdecimal) allowedchars += CultureInfo.CurrentUICulture.NumberFormat.CurrencyDecimalSeparator;
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// Check if key is not allowed
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if(allowedchars.IndexOf(e.KeyChar) == -1)
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{
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// Cancel this
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e.Handled = true;
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}
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else
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{
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// Check if + or - is pressed
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if((e.KeyChar == '+') || (e.KeyChar == '-'))
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{
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// Determine non-selected text
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if(this.SelectionLength > 0)
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{
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nonselectedtext = this.Text.Substring(0, this.SelectionStart) +
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this.Text.Substring(this.SelectionStart + this.SelectionLength);
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}
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else if(this.SelectionLength < 0)
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{
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nonselectedtext = this.Text.Substring(0, this.SelectionStart + this.SelectionLength) +
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this.Text.Substring(this.SelectionStart);
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}
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else
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{
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nonselectedtext = this.Text;
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}
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// Not at the start?
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selectionpos = this.SelectionStart - 1;
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if(this.SelectionLength < 0) selectionpos = (this.SelectionStart + this.SelectionLength) - 1;
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if(selectionpos > -1)
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{
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// Find any other characters before the insert position
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textpart = this.Text.Substring(0, selectionpos + 1);
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textpart = textpart.Replace("+", "");
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textpart = textpart.Replace("-", "");
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if(textpart.Length > 0)
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{
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// Cancel this
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e.Handled = true;
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}
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}
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// Determine other prefix
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if(e.KeyChar == '+') otherprefix = '-'; else otherprefix = '+';
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// Limit the number of + and - allowed
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numprefixes = nonselectedtext.Split(e.KeyChar, otherprefix).Length;
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if(numprefixes > 2)
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{
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// Can't have more than 2 prefixes
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e.Handled = true;
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}
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else if(numprefixes > 1)
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{
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// Must have 2 the same prefixes
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if(this.Text.IndexOf(e.KeyChar) == -1) e.Handled = true;
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// Double prefix must be allowed
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if(!allowrelative) e.Handled = true;
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}
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}
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}
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// Call base
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base.OnKeyPress(e);
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}
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// Validate contents
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protected override void OnValidating(CancelEventArgs e)
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{
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string textpart = this.Text;
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// Strip prefixes
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textpart = textpart.Replace("+", "");
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if(!allownegative) textpart = textpart.Replace("-", "");
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// No numbers left?
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if(textpart.Length == 0)
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{
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// Make the textbox empty
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this.Text = "";
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}
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// Call base
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base.OnValidating(e);
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}
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// This determines the result value
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public int GetResult(int original)
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{
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string textpart = this.Text;
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int result;
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// Strip prefixes
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textpart = textpart.Replace("+", "");
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textpart = textpart.Replace("-", "");
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// Any numbers left?
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if(textpart.Length > 0)
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{
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// Prefixed with ++?
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if(this.Text.StartsWith("++"))
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{
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// Add number to original
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if(!int.TryParse(textpart, out result)) result = 0;
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return original + result;
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}
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// Prefixed with --?
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else if(this.Text.StartsWith("--"))
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{
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// Subtract number from original
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if(!int.TryParse(textpart, out result)) result = 0;
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int newvalue = original - result;
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if(!allownegative && (newvalue < 0)) newvalue = 0;
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return newvalue;
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}
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else
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{
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// Return the new value
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return int.TryParse(this.Text, out result) ? result : original;
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}
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}
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else
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{
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// Nothing given, keep original value
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return original;
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}
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}
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// This determines the result value
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public float GetResultFloat(float original)
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{
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string textpart = this.Text;
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float result;
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// Strip prefixes
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textpart = textpart.Replace("+", "");
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textpart = textpart.Replace("-", "");
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// Any numbers left?
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if(textpart.Length > 0)
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{
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// Prefixed with ++?
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if(this.Text.StartsWith("++"))
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{
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// Add number to original
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if(!float.TryParse(textpart, out result)) result = 0;
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return original + result;
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}
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// Prefixed with --?
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else if(this.Text.StartsWith("--"))
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{
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// Subtract number from original
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if(!float.TryParse(textpart, out result)) result = 0;
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float newvalue = original - result;
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if(!allownegative && (newvalue < 0)) newvalue = 0;
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return newvalue;
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}
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else
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{
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// Return the new value
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return float.TryParse(this.Text, out result) ? result : original;
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}
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}
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else
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{
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// Nothing given, keep original value
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return original;
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}
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}
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#endregion
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}
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}
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