How to detect Mouse over gui and guilayout elements?

Questions & Answers
1

Hi,

Say I have a gui slider controlling a model property and when the user mouse over this slider I want to hilite the 3d model that will be affected by this slider.

Problem is I can't find a way to register a function to gui mouse events. I do not need to modify the style or skin of the gui on mouseover, I need to call a function of mine.

Is it possible? or am I missing the plain obvious?

thanks for your help

Jean

3

Found the answer here:

http://unity3d.com/support/documentation/ScriptReference/GUILayoutUtility.GetLastRect.html

There is also a clear example on detecting mouseover. Works perfectly.

Here’s a solution that works for GUILayout also … what a hassle.

Just after GUILayout.HorizontalSlider …

if (Event.current.type == EventType.Repaint &&
	GUILayoutUtility.GetLastRect().Contains(Event.current.mousePosition))
	{
	usingSlider=true;
	}

then in your update routine …

void Update()
	{
	if ( Input.touchCount == 0 ) usingSlider = false;
	if ( usingSlider == true ) return;
	.. continue as normal...

that’s it !

5

Anybody knows how to do this in the 4.6 UI ? I don’t want my controls to fire if I’m hovering over my hud elements with the mouse.

2

Check out the answer to this question: Mouseover-Detection.

4

Check out the second post here:
http://forum.unity3d.com/threads/gui-button-hover-change-text-color-solved.262440/#post-1735230

6

@Jean-Fabre 's answer is on point, that is, if your tool uses only one window instance.
Should it allow for more than one instance at a time, the detection breaks a bit.

The only solution I’ve found is to limit the detection to mouse event, and so I replaced Repaint with MouseMove

if (Event.current.type == EventType.MouseMove &&
    GUILayoutUtility.GetLastRect().Contains(Event.current.mousePosition))
{
    usingSlider=true;
}

Don’t forget to add this at the start of OnGUI!

wantsMouseMove = true;