我想滚动聊天框时向上滚动时间框。 (不一定反之亦然)
我找到了以下代码:
/// Subclass RichTextBox to add the capability to bind scrolling for multiple RichTextBoxs.
/// This is useful for 'parallel' RTBs that require synchronized scrolling.
/// Taken from https://gist.github.com/593809
/// Added WM_HSCROLL
/// Added BindScroll() to form a two-way linkage between RichTextBoxes.
/// Example usage showing how to bind 3 RichTextBoxes together:
/// rtb1.BindScroll(rtb2);
/// rtb2.BindScroll(rtb3);
/// rtb3.BindScroll(rtb1);
class RichTextBoxSynchronizedScroll : RichTextBox
{
private const int WM_VSCROLL = 0x115;
private const int WM_HSCROLL = 0x114;
private List<RichTextBoxSynchronizedScroll> peers = new List<RichTextBoxSynchronizedScroll>();
/// <summary>
/// Establish a 2-way binding between RTBs for scrolling.
/// </summary>
/// <param name="arg">Another RTB</param>
public void BindScroll( RichTextBoxSynchronizedScroll arg )
{
if ( peers.Contains( arg ) || arg==this ) { return; }
peers.Add( arg );
arg.BindScroll(this);
}
private void DirectWndProc(ref Message m)
{
base.WndProc(ref m);
}
protected override void WndProc(ref Message m)
{
if (m.Msg == WM_VSCROLL || m.Msg == WM_HSCROLL )
{
foreach (RichTextBoxSynchronizedScroll peer in this.peers)
{
Message peerMessage = Message.Create(peer.Handle, m.Msg, m.WParam, m.LParam);
peer.DirectWndProc(ref peerMessage);
}
}
base.WndProc(ref m);
}
}
然而,我一直在试图让不同的代码工作超过2个小时,但我无法让它们中的任何一个工作,因为我只是只是开始编程,我无法弄清楚如何处理这段代码。
我已经尝试将它作为一个额外的类放在我的表单代码中,但是我实际上无法将BindScroll()应用于任何文本框,因为我无法引用它们或实例。
也许我可以,但我不知道如何。我已经尝试过只使用类中的代码,而不是它本身就是一个类,但这会导致错误。
非常感谢任何帮助......
答案 0 :(得分:1)
在测试代码后,它似乎工作正常。您的问题可能是您不知道如何使用代码,您必须将新的richtextbox声明为RichTextBoxSynchronizedScroll
而不是标准RichTextBox
:
//Here is the test
public partial class Form1 : Form {
public Form1(){
InitializeComponent();
rb1.Size = new Size(200,100);
rb2.Size = rb1.Size;
rb2.Left = rb1.Right + 5;
rb1.Parent = rb2.Parent = this;
rtb1.BindScroll(rtb2);
//try populating some data for both the richtextboxes
for(int i = 0; i < 200; i++)
rtb1.Text += Guid.NewGuid() + "\r\n";
rtb2.Text = rtb1;
//now try scrolling the rtb1
//I suggest you should add WM_MOUSEWHEEL = 0x20a into the if statement
//something like this: if (m.Msg == WM_VSCROLL || m.Msg == WM_HSCROLL || m.Msg == WM_MOUSEWHEEL) ...
}
RichTextBoxSynchronizedScroll rtb1 = new RichTextBoxSynchronizedScroll();
RichTextBoxSynchronizedScroll rtb2 = new RichTextBoxSynchronizedScroll();
}
//That's all
答案 1 :(得分:0)
我已经解决了整整3个小时......我想要一些非常简单的东西。我考虑了滚动的各个方面。 您只需要创建VScrollBar 并定义像这样的滚动事件
private void vScrollBar1_Scroll(object sender, ScrollEventArgs e)
{
int position = text1.GetFirstCharIndexFromLine(vScrollBar1.Value);
//position only 0.character on line
textBox1.Select(position, 0);//if position=vScrollBar1.Value you would actually scrolling char by char
textBox2.Select(position, 0);
textBox1.ScrollToCaret();
textBox2.ScrollToCaret();
}
希望将来我能找到这个。