如何在FastColoredTextBox中复制，粘贴和剪切？

Question

I need three functions: Copy, Paste, Cut ,

For a FastColoredTextBox .. so far with my methods, the job is done but afterwards,

the cursor's position get changed and I got no clue on how to keep it where it

was before.

Here's my methods:

    private void OnMouseMenuCut(object sender, EventArgs e)
    {
        var sPoint = rtbScript.SelectionStart;
        var ePoint = rtbScript.SelectionLength;

        var text = rtbScript.SelectedText;
        rtbScript.Text = rtbScript.Text.Remove(sPoint, ePoint);

        Clipboard.SetText(text.Replace("\n", "\r\n"));
        rtbScript.Text = rtbScript.Text.Insert(sPoint, text);
    }

    private void OnMouseMenuCopy(object sender, EventArgs e)
    {
        if (string.IsNullOrEmpty(rtbScript.SelectedText)) return;
        Clipboard.SetText(rtbScript.SelectedText.Replace("\n", "\r\n"));

    }

    private void OnMouseMenuPaste(object sender, EventArgs e)
    {
        if (!Clipboard.ContainsText()) return;
        var index = rtbScript.SelectionStart;

        rtbScript.Text = rtbScript.Text.Insert(index, Clipboard.GetText());
    }

Also, If there's a better way to do those functions, please post..

Thanks!

Answer 1

For a RichTextBox your code has more issues than loosing the Cursor position, It also looses all formatting! Here are versions that should work better:

    private void OnMouseMenuCut(object sender, EventArgs e)
    {
        var sPoint = rtbScript.SelectionStart;
        var text = rtbScript.SelectedText;

        rtbScript.Cut();

        Clipboard.SetText(text.Replace("\n", "\r\n"));
        rtbScript.SelectionStart = sPoint;
    }

    private void OnMouseMenuCopy(object sender, EventArgs e)
    {
        if (string.IsNullOrEmpty(rtbScript.SelectedText)) return;
        Clipboard.SetText(rtbScript.SelectedText.Replace("\n", "\r\n"));
    }

    private void OnMouseMenuPaste(object sender, EventArgs e)
    {
        if (!Clipboard.ContainsText()) return;
        var index = rtbScript.SelectionStart;

        rtbScript.SelectedText = Clipboard.GetText();
        rtbScript.SelectionStart = index + Clipboard.GetText().Length;
    }

Note: You must never change the Text property of a RTB or else you will mess up the formating!

Since you wrote that this also works with your FastColoredTextBox I have undeleted the solution..

Answer 2

In the current version of FCTB, these methods already exist inside the FCTB.cs file. They just need to be linked up.