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Menu and PanelBar - sub menu items hidden behind the container

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Chris
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Chris asked on 26 Feb 2018, 07:03 AM

HI

I have found the sub menu items will be hidden behind the container  while Menu was placed within PanelBar(overflow: auto). 
SplitterPane have the same unexpected situation too.

Why the Menu do not just popup the sub menu items as ContextMenu ? 

Menu / Context Menu

https://demos.telerik.com/aspnet-mvc/menu/context-menu
I hope the next (or next next) release will fix this elementary problem.

*z-index have no effects (because containers overflow: auto).
*containers autoflow: auto are required in my application (don't ask me use overflow: visible or larger width).

See attachment.

Best regards

Chris

 

 

 

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Magdalena
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answered on 27 Feb 2018, 02:24 PM
Hi Chris,

Actually this is an expected behavior. Context menu is a popup, which is opened by clicking a target which is not part (an item) of the menu. They are two separate objects. Menu is actually a list of items/options. Dropdown of the menu is actually shown list of root items children. For that reason the menu dropdown is wrapped in the same element as its root items.

Regards,
Magdalena
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Chris
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answered on 01 Mar 2018, 08:11 AM
Yes, that is an expected behavior, but control should overcome the problem about z-index (see attachment - Telerik Menu and PanelBar 3.png).

Best regards

Chris
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Magdalena
Telerik team
answered on 01 Mar 2018, 02:33 PM
Hi Chris,

Setting z-index do not affect overflowing an element. If a parent cuts/hides its DOM children because of overflowing, it cannot be resolved by z-index. Overflowing can simply cuts elements while z-index specifies the stack order. As popup is rendered as a direct child of <body>, it is not child of panelbar/splitter. So it cannot be cut by overflow property applied to those widgets. Menu subitem is rendered as a DOM children placed in the menu, which is child of panelbar/splitter. In this case the element will be cut regardless its stack order (z-index).

Regards,
Magdalena 
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Chris
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answered on 02 Mar 2018, 01:56 AM

HI

 

I known that '...Setting z-index do not affect overflowing an element. If a parent cuts/hides its DOM children...',

but the answer still unable to solve the problem - Menu in PanelBar(or SplitterPane).

 

Best regards

 

Chris

 

 

 

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Dimitar
Telerik team
answered on 05 Mar 2018, 02:04 PM
Hi Chris,

The described difference in the appearance of sub-menu items and sub-context menu items is not a bug to be resolved. As Magdalena explained, sub items of a menu placed inside Splitter/PanelBar will be cut and this is not a bug. It is expected behavior due to the DOM structure in this scenario - Dojo snippet.

Regards,
Dimitar
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Syleps
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answered on 18 Feb 2021, 10:51 AM

Hi,

I allow myself to answer this topic because I have exactly the same problem, and I would have wanted to know if, 2 years later, it was possible to make a menu  which "leaves" the DOM, as for the menus of the grid column headers ?

Regards

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Aleksandar
Telerik team
answered on 22 Feb 2021, 09:33 AM

Hi Syleps,

The difference in the behavior of the Menu sub-menu items and the ContextMenu sub-items is still expected, as explained by Margarita and Dimitar. The scenario demonstrated in the dojo Dimitar shared is still valid today https://dojo.telerik.com/OzoDeZIb In the particular example the ContextMenu popup is rendered as a direct child of <body>, it is not a child of the Splitter. So it is not cut by the overflow property applied to the widgets. The Menu subitem is rendered as a DOM children placed in the menu, which is a child of the Splitter.

Regards,
Aleksandar
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Magdalena
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Chris
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Dimitar
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Syleps
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Aleksandar
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