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TextBoxFix: unused usings removed; ctrl-y & crtl-z features added; (#39)

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TextBoxFix: Ctrl-A, Ctrl-Z, Ctrl-Y
This commit is contained in:
Dmitriy Nikifrov 2019-02-26 04:52:15 +05:00 committed by dexyfex
parent 0418e7743e
commit 6233135ad5
1 changed files with 66 additions and 10 deletions
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76
CodeWalker.WinForms/TextBoxFix.cs
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@ -1,17 +1,15 @@
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace CodeWalker.WinForms
{
public partial class TextBoxFix : TextBox
{
bool ignoreChange = true;
List<string> storageUndo;
List<string> storageRedo;
public TextBoxFix()
{
InitializeComponent();
@ -22,17 +20,75 @@ namespace CodeWalker.WinForms
base.OnPaint(pe);
}
protected override void OnCreateControl()
{
base.OnCreateControl();
storageRedo = new List<string>();
storageUndo = new List<string> { Text };
ignoreChange = false;
}
protected override bool ProcessCmdKey(ref Message msg, Keys keyData)
{
//Fix for Ctrl-A not working in multiline textboxes.
//Fix for Ctrl-A/Z/Y not working in multiline textboxes.
const int WM_KEYDOWN = 0x100;
var keyCode = (Keys)(msg.WParam.ToInt32() & Convert.ToInt32(Keys.KeyCode));
if ((msg.Msg == WM_KEYDOWN && keyCode == Keys.A) && (ModifierKeys == Keys.Control) && Focused)
if (msg.Msg == WM_KEYDOWN && (ModifierKeys == Keys.Control) && Focused)
{
SelectAll();
return true;
if (keyCode == Keys.A)
{
SelectAll();
return true;
}
if (keyCode == Keys.Z)
{
Undo();
return true;
}
if (keyCode == Keys.Y)
{
Redo();
return true;
}
}
return base.ProcessCmdKey(ref msg, keyData);
}
protected override void OnTextChanged(EventArgs e)
{
base.OnTextChanged(e);
if (!ignoreChange)
{
ClearUndo();
if (storageUndo.Count > 2048) storageUndo.RemoveAt(0);
if (storageRedo.Count > 2048) storageRedo.RemoveAt(0);
storageUndo.Add(Text);
}
}
public void Redo()
{
if (storageRedo.Count > 0)
{
ignoreChange = true;
Text = storageRedo[storageRedo.Count - 1];
storageUndo.Add(Text);
storageRedo.RemoveAt(storageRedo.Count - 1);
ignoreChange = false;
}
}
public new void Undo()
{
if (storageUndo.Count > 1)
{
ignoreChange = true;
Text = storageUndo[storageUndo.Count - 2];
storageRedo.Add(storageUndo[storageUndo.Count - 1]);
storageUndo.RemoveAt(storageUndo.Count - 1);
ignoreChange = false;
}
}
}
}