I need a text editor control for column edit in my application.
Like notepad++ alt+mouse drag to select a text block , or pull down a long vertical cursor and press a key to insert a char to every lines over cursor.
I tried ScintillaNET but it not suppor the column-modet for insert, just can remove selected text block
I need below effect(notepad++), But ScintillaNET got:
1 Answers
Answers 1
I found a way to solve. Still using ScintillaNET.
But coding is too complex, any body can give some help?
class SelWrap { public int Begin { get; set; } public int Length { get; set; } } //... editor.KeyDown += (s, e) => { // filter alt we will hold down alt to make vertical selection if (e.Alt) return; var tb = editor; if (tb.Selections.Count < 2) return; // no in column mode e.SuppressKeyPress = true; //block input, handle by below code //refered from post #5825820 var input = Utility.GetCharFromKey(e.KeyCode).ToString(); if (input == "\0") { //SystemSounds.Beep.Play(); return; } var array = tb.Selections .OrderBy(p => p.Start) .Select(p => new SelWrap{Begin=p.Start, Length=p.End - p.Start }) .ToArray(); //do process every caret(or selection) for (var i = 0; i < array.Length; i++) { var item = array[i]; if (item.Length > 0) { //if has selected text, just clean tb.DeleteRange(item.Begin, item.Length); for (var j = i + 1; j < array.Length; j++) { array[j].Begin -= item.Length; } } if (input == "\b") //backspace { if (item.Length != 0) continue; //delete a char before caret tb.DeleteRange(item.Begin - 1, 1); for (var j = i; j < array.Length; j++) { array[j].Begin--; } } else //just insert that { tb.InsertText(item.Begin, input); for (var j = i; j < array.Length; j++) { array[j].Begin++; } } } //restore caret status to keep column mode tb.ClearSelections(); tb.SetSelection(array[0].Begin, array[0].Begin); for (var i = 1; i < array.Length; i++) { var item = array[i]; tb.AddSelection(item.Begin, item.Begin); } }; //... 
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