You tried to use z-index of the calendar itself, right?
Try to make the panel with calendar higher than the panel below (using z-index and relative positioning)
You're right i've just changed the z-index of the calendar.
You said : "Try to make the panel with calendar higher than the panel below (using z-index and relative positioning)."
Which panel to change ?
My Ui is built with nested panels : SimpleTogglePanel - Panel -PanelGrid - SimpleTogglePanel - ...
The panel that just enclosed Calendar or another one ?
What do you mean with relative positionning ? Don't know what you want me to do.
Thank you for your time,
Like Sergey said, i've Just found the solution :
In my UI, i have several grid panel which contains nested panels.
I changed the style of the grid panel which contains the calandar.
Style Grid Panel Calendar : width : 100%;position: relative; top: 6px; left: 0px;z-index : 300;
And now it works !!!