Make a TextBox tooltip appear in-place (same as overly wide TreeView node texts)

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Richard - 27 Sep 2007 17:38 GMT

I'm trying to mimic how the TreeView shows a full text inplace tooltip
when the mouse hovers over of TreeView node whose text is truncated
due to skinny form or panel.

In the IDE I have
Text1.text is 'A rather longish bit of text, may a really long
pathname or something similar';
ToolTip1.OwnerDraw is True (this causes ToolTip1_Draw() to run)

I was hoping this would work...

private void toolTip1_Draw(object sender, DrawToolTipEventArgs
e)
{
ToolTip1.Show(e.ToolTipText, e.AssociatedWindow,
0,0,5000);
}

But it throws Win32Exception .. Error creating window handle.

Can anyone recommend some quick and dirty code for doing inplace
tooltips ?

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Dave Anson - 27 Sep 2007 21:25 GMT

> A rather longish bit of text, may a really long
> pathname or something similar

private void textBox1_MouseHover(object sender, System.EventArgs e)
{
this.toolTip1.SetToolTip( ((TextBox)sender), ((TextBox)sender).Text );
this.toolTip1.Active = true;
}

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Richard - 28 Sep 2007 17:38 GMT

> > A rather longish bit of text, may a really long
> > pathname or something similar
[quoted text clipped - 5 lines]
>
> }

Thanks Dave,

I ended up with this little more complicated mousehover handler. The
'in-place' part is ensuring the tool tip overlays the text field very
closely (things can be minorly different if different fonts for
tooltip and textbox)

TextBox t = (TextBox)sender;
Point p = this.PointToClient(t.PointToScreen(t.Location));
p.X = p.X + SystemInformation.BorderSize.Width *
SystemInformation.BorderMultiplierFactor - 1;
p.Y = p.Y + SystemInformation.BorderSize.Height *
SystemInformation.BorderMultiplierFactor + 1;
toolTip1.Show(t.Text, this, p, 5000);

Richard

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Make a TextBox tooltip appear in-place (same as overly wide TreeView node texts)

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