Question

我现在可以使用这段代码同步我的两个bmd bp choles weight age 1 2 3 22.3 12 2 1 2 33.2 13 3 2 5 44.5 16：

RichTextBox

我可以在按键，向上和private const int SB_HORZ = 0x0; private const int SB_VERT = 0x1; private const int WM_HSCROLL = 0x114; private const int WM_VSCROLL = 0x115; private const int SB_THUMBPOSITION = 4; [DllImport("user32.dll", CharSet = CharSet.Auto)] private static extern int GetScrollPos(int hWnd, int nBar); [DllImport("user32.dll")] private static extern int SetScrollPos(IntPtr hWnd, int nBar, int nPos, bool bRedraw); [DllImport("user32.dll")] private static extern bool PostMessageA(IntPtr hWnd, int nBar, int wParam, int lParam); internal int HScrollPos { private get { return GetScrollPos((int)this.Handle, SB_HORZ); } set { SetScrollPos((IntPtr)this.Handle, SB_HORZ, value, true); PostMessageA((IntPtr)this.Handle, WM_HSCROLL, SB_THUMBPOSITION + 0x10000 * value, 0); } } internal int VScrollPos { get { return GetScrollPos((int)this.Handle, SB_VERT); } set { SetScrollPos((IntPtr)this.Handle, SB_VERT, value, true); PostMessageA((IntPtr)this.Handle, WM_VSCROLL, SB_THUMBPOSITION + 0x10000 * value, 0); } }事件时同步RichTextBoxes。确实这不是我的目标，我想根据内容同步我的Vscroll， 我需要什么：

获取未选中的当前行表单RichTextBoxes。
使用另一个RichTextBox中的行号设置滚动条位置（不会失去当前焦点）。
使用滚动条位置获取行号。

注意：欢迎您询问是否需要更多细节提前谢谢。

Answer 1

根据我的理解，您需要根据行号同步滚动2 RichTextBox es。 如果我误解了它，请给我留言。

RichTextBox延长：

public class RichTextBoxEx : RichTextBox
{
    // combination of multiple events that may cause focus(caret) to change
    public event EventHandler FocusChanged;

    public RichTextBoxEx()
    {
        this.KeyPress += (s, e) => RaiseFocusChanged();
        this.KeyDown += (s, e) => RaiseFocusChanged();
        this.KeyUp += (s, e) => RaiseFocusChanged();
        this.MouseClick += (s, e) => RaiseFocusChanged();
    }

    private void RaiseFocusChanged()
    {
        var focusChanged = FocusChanged;
        if (focusChanged != null)
        {
            focusChanged(this, null);
        }
    }

    public int GetFirstSelectedLine()
    {
        var index = GetFirstCharIndexOfCurrentLine();
        return GetLineFromCharIndex(index);
    }
    public int GetFirstVisibleLine()
    {
        var index = GetCharIndexFromPosition(new Point(1, 1));
        return GetLineFromCharIndex(index);
    }

    public void ScrollToLine(int line)
    {
        if (line < 0)
            throw new ArgumentOutOfRangeException("line cannot be less than 0");

        // save the current selection to be restored later
        var selection = new { SelectionStart, SelectionLength };

        // select that line and scroll it to
        Select(GetFirstCharIndexFromLine(line) + 1, 0);
        ScrollToCaret();

        // restore selection
        Select(selection.SelectionStart, selection.SelectionLength);
    }
}

用法：

void Main()
{
    var mainScreenArea = Screen.PrimaryScreen.WorkingArea;

    var rich1 = new RichTextBoxEx() { Width = mainScreenArea.Width / 2 - 10, Dock = DockStyle.Left };
    var rich2 = new RichTextBoxEx() { Width = mainScreenArea.Width / 2 - 10, Dock = DockStyle.Right };
    rich1.LoadFile(__RTF_FILE_0__);
    rich2.LoadFile(__RTF_FILE_1__);

    // pick one :
    // synchronize by focus
    rich1.FocusChanged += (s, e) => rich2.ScrollToLine(rich1.GetFirstSelectedLine());
    // synchronize by viewbox
    // rich1.VScroll += (s, e) => rich2.ScrollToLine(rich1.GetFirstVisibleLine());

    var form = new Form();
    form.Controls.Add(rich1);
    form.Controls.Add(rich2);

    form.WindowState = FormWindowState.Maximized;
    form.ShowDialog()
}

Richtextbox将行号转换为滚动条位置

1 个答案: