First, why would you want to change the
ToolTip text during the
PopUp? Why not hook the
MouseHover of the control that you want to change the
ToolTip? Dynamically setting the
ToolTip does not require hooking the
PopUp event.
How about:
public partial class Form1 : Form
{
Random rnd;
ToolTip toolTip1;
String[] tipText;
public Form1()
{
InitializeComponent();
InitializeToolTips();
tipText = File.ReadAllLines(@"..\..\Form1.cs");
rnd = new Random();
}
private void InitializeToolTips()
{
toolTip1 = new ToolTip();
toolTip1.SetToolTip(button1, "Fixed text");
toolTip1.SetToolTip(button2, "Variable text");
button1.MouseHover += button_MouseHover;
}
private String NewTipText()
{
Int32 idx = rnd.Next(0, tipText.Length);
return tipText[idx];
}
private void button_MouseHover(object sender, System.EventArgs e)
{
String proposed = NewTipText();
if (!String.IsNullOrEmpty(proposed)) {
toolTip1.SetToolTip((Control)sender, proposed);
}
}
}
