我有一个多行文本框,根据给定的数据显示一些值(通常每行一个值)。
(为了使用工具提示弹出窗口显示一些“替代”数据),我想获取鼠标悬停的单词(或至少是行),以便我可以找到要显示的替代内容。
我有一些关于如何通过文本框和字体大小进行计算的想法,但我不想走这条路,因为大小和字体可能经常更改。
那么...有没有办法利用鼠标位置来获取特定文本框的文本?
我有一个多行文本框,根据给定的数据显示一些值(通常每行一个值)。
(为了使用工具提示弹出窗口显示一些“替代”数据),我想获取鼠标悬停的单词(或至少是行),以便我可以找到要显示的替代内容。
我有一些关于如何通过文本框和字体大小进行计算的想法,但我不想走这条路,因为大小和字体可能经常更改。
那么...有没有办法利用鼠标位置来获取特定文本框的文本?
private void txtHoverWord_MouseMove(object sender, MouseEventArgs e)
{
if (!(sender is TextBox)) return;
var targetTextBox = sender as TextBox;
if(targetTextBox.TextLength < 1) return;
var currentTextIndex = targetTextBox.GetCharIndexFromPosition(e.Location);
var wordRegex = new Regex(@"(\w+)");
var words = wordRegex.Matches(targetTextBox.Text);
if(words.Count < 1) return;
var currentWord = string.Empty;
for (var i = words.Count - 1; i >= 0; i--)
{
if (words[i].Index <= currentTextIndex)
{
currentWord = words[i].Value;
break;
}
}
if(currentWord == string.Empty) return;
toolTip.SetToolTip(targetTextBox, currentWord);
}
public partial class Form3 : Form
{
System.Windows.Forms.Timer timer = new System.Windows.Forms.Timer();
public Form3()
{
InitializeComponent();
timer.Interval = 50;
timer.Tick += timer_Tick;
}
void timer_Tick(object sender, EventArgs e)
{
timer.Stop();
MessageBox.Show(richTextBox1.SelectedText);
// do more stuff here, e.g display your tooltip for the selected word or anything else
richTextBox1.SelectionLength = 0; // remove the highlighted color of selection
}
[DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
public static extern void mouse_event(uint dwFlags, uint dx, uint dy, uint cButtons, uint dwExtraInfo);
private const uint MOUSEEVENTF_LEFTDOWN = 0x02;
private const uint MOUSEEVENTF_LEFTUP = 0x04;
private const uint MOUSEEVENTF_RIGHTDOWN = 0x08;
private const uint MOUSEEVENTF_RIGHTUP = 0x10;
public void DoMouseDoubleClick()
{
//Call the imported function with the cursor's current position
uint X = (uint)Cursor.Position.X;
uint Y = (uint)Cursor.Position.Y;
mouse_event(MOUSEEVENTF_LEFTDOWN, X, Y, 0, 0);
mouse_event(MOUSEEVENTF_LEFTUP, X, Y, 0, 0);
mouse_event(MOUSEEVENTF_LEFTDOWN, X, Y, 0, 0);
mouse_event(MOUSEEVENTF_LEFTUP, X, Y, 0, 0);
timer.Start(); // some delay is required so that mouse event reach to RichTextBox and the word get selected
}
private void richTextBox1_MouseDown(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Middle)
{
DoMouseDoubleClick();
}
}
}