GuiGetScreenSize

From Multi Theft Auto: Wiki

This function retrieves the local screen size according to the resolution they are using.

Syntax

float float guiGetScreenSize()

OOP Syntax Help! I don't understand this!

Method: GuiElement.getScreenSize(...)

Returns

This returns two floats representing the player's screen resolution, width and height.

Example

This example checks whether a player is using a low resolution, and warns them that GUI may appear incorrect. 

--setup a function when the resource starts
function checkResolutionOnStart ()
	local x,y = guiGetScreenSize() --get their screen size
	if ( x <= 640 ) and ( y <= 480 ) then --if their resolution is lower or equal to 640x480
		--warn them about GUI problems.
		outputChatBox ( "WARNING: You are running on a low resolution.  Some GUI may be placed or appear incorrectly." )
	end
end
--attach the function to the event handler
addEventHandler ( "onClientResourceStart", resourceRoot, checkResolutionOnStart )


Using guiGetScreenSize to fit GUI & DX drawing in all resolutions

To get the precise coordinates of a GUI element or DX drawings, you need to decide which edges of the screen you want to have them positioned against, then you just need to find the difference between your screen size and your position values.

For example, there is a DX text. It fits on 1024x768 resolution. 

function DXtext ()
dxDrawText(tostring "Hello World!",684.0,731.0,732.0,766.0,tocolor(0,255,255,175),1.0,"bankgothic","left","top",false,false,false)
end

addEventHandler ( "onClientRender", getRootElement(), DXtext )

Now if you want it to fit on all resolutions. Then follow these steps:

1. Add width and height variables to get GUI's screen size, here we use sWidth and sHeight. 

local sWidth,sHeight = guiGetScreenSize() -- The variables
dxDrawText( "Hello World!",684.0,731.0,732.0,766.0,tocolor(0,255,255,175),1.0,"bankgothic","left","top",false,false,false)

2. Divide each of the DX text's position values by the screen size manually (remembering the resolution is 1024x768):

  • Left position value is 684, 684/1024 = 0.668
  • Top position value is 731, 731/768 = 0.952
  • Right position values is 732, 732/1024 = 0.715
  • Bottom position value is 766, 766/768 = 0.997

You may want to use a calculator to help you count.

3. Now with the answer above remove all of the position values and replace it with the width or height variable multiplied by the answer. Which would be: 

local sWidth,sHeight = guiGetScreenSize() -- The variables
dxDrawText("Hello World!",sWidth*0.668, sHeight*0.952, sWidth*0.715, sHeight*0.997,tocolor(0,255,255,175),1.0,"bankgothic","left","top",false,false,false)

So the final results will be a DX text which will fit on all resolutions which will be: 

function DXtext ()
local sWidth,sHeight = guiGetScreenSize() -- The variables
dxDrawText("Hello World!",sWidth*0.668, sHeight*0.952, sWidth*0.715, sHeight*0.997,tocolor(0,255,255,175),1.0,"bankgothic","left","top",false,false,false)
end

addEventHandler ( "onClientRender", getRootElement(), DXtext )

We can also do it by ourself doing some calculations in the code. This works in all resolution, adjusting the scale to all screen-sizes. 

local sx, sy = guiGetScreenSize( )

addEventHandler( "onClientRender", root,
	function( )
	     dxDrawText( "Hello World!", sx*( 684/1024 ), sy*( 731/768 ), sx*( 732/1024 ), sy( 766/768 ), tocolor(0,255,255,175), sx/1000*1.0,"bankgothic","left","top",false,false,false ) 
	end
)

See Also

General functions

Browsers

Buttons

Checkboxes

Comboboxes

Edit Boxes

Gridlists

Memos

Progressbars

Radio Buttons

Scrollbars

Scrollpanes

Static Images

Tab Panels

Tabs

Text Labels

Windows

Input

GUI


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