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[E2] VGUI Core

As of the modular update, you can now create almost any type of derma.
This extension allows you to select, manipulate and send to other players a vgui type from a template list.

Patterns are defined in the addon and cannot be created by the player using the E2
You load up a template from the list below.
You set the elements data on it with the function vguiSet*.
The text you input in those is going to be displayed on the gui in the places defined by the list. (button text, ...)
Once you're done editing the vgui, you can send it to a player with player:vguiAsk.
All the vgui functions require an ID parameter, this defines which vgui you're working on, this is arbitrary and simply allows you to define the vguis only once and not when it is sent. You choose this ID, it is arbitrary and needs to be a string.
Note that a player can block you. This means any vgui you try to send to that player will not show up on his screen. Blocked users list can be cleared with the command vguicore_clearblocked.

(currently: 4)
popupask : a text query window, much like the wire text entry.

buttonlist : a grid pattern of buttons.

popup: A simple informational pop up window.

modular: well this is quite a bit more complicated as you can guess from the name.

Elements Structure (used in the 'modular' pattern):

Server owners can add their own templates in lua/vguicoretemplates/
See the existing ones for reference on how to build them.

vguiLoadTemplate(string currentVGUI, string templateName)
vguiSetString(string currentVGUI, string field, string data)
vguiSetTable(string currentVGUI, string field, table data)
player:vguiAsk(string currentVGUI)

vguiClk() - was the execution caused by a vgui returning? (1/0)
vguiClkOrigin() - origin of the return (determined by the template)
vguiClkData() - data coming from the return (popupask uses this to return the entered text)
vguiClkPlayer() - player who had the vgui.

VGUICore_CanUse: Who can use this addon (1:everyone, 2:only admins) default:1
VGUICore_Cooldown: How long untill the player can send another vgui to a player (value in seconds)
VGUICore_ReloadTemplates: Does what its name says.(removed due to being useless)

Clientside:
VGUICore_ClearBlocked: Clear the blocked users list.
VGUICore_ReloadTemplates: Reload templates clientside, required for template 'developing'.