OnClientGUIMouseDown: Difference between revisions

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(New page: {{Client event}} __NOTOC__ This event is fired when the user clicks certain mouse button on a GUI element. ==Parameters== <syntaxhighlight lang="lua"> string button, int absoluteX, int absoluteY </code...)
 
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==Example==  
==Example==  
This example show how to add very basic ''click'n'drag'' feature for GUI elements (only for those which parent element is gui-root)
<syntaxhighlight lang="lua">
<syntaxhighlight lang="lua">
-- TODO
 
addEventHandler( "onClientGUIMouseDown", getRootElement( ),
    function ( btn, x, y )
        if btn == "left" then
            clickedElement = source; -- store the clicked element in a global variable
            local elementPos = { guiGetPosition( source, false ) };
            offsetPos = { x - elementPos[ 1 ], y - elementPos[ 2 ] }; -- get the offset position
        end
    end
);
 
addEventHandler( "onClientGUIMouseUp", getRootElement( ),
    function ( btn, x, y )
        if btn == "left" then
            clickedElement = nil;
        end
    end
);
 
addEventHandler( "onClientCursorMove", getRootElement( ),
    function ( _, _, x, y )
        if clickedElement then
            guiSetPosition( clickedElement, x - offsetPos[ 1 ], y - offsetPos[ 2 ], false );
        end
    end
);
 
</syntaxhighlight>
</syntaxhighlight>


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===Client event functions===
===Client event functions===
{{Client_event_functions}}
{{Client_event_functions}}
[[Category:Needs_Example]]

Revision as of 18:42, 5 October 2009

This event is fired when the user clicks certain mouse button on a GUI element.

Parameters

string button, int absoluteX, int absoluteY
  • button: the name of the mouse button that the GUI element was clicked with, can be left, right, or middle.
  • absoluteX: the X position of the mouse cursor, in pixels, measured from the left side of the screen.
  • absoluteY: the Y position of the mouse cursor, in pixels, measured from the top of the screen.

Source

The source of this event is the GUI element that was clicked.

Example

This example show how to add very basic click'n'drag feature for GUI elements (only for those which parent element is gui-root) 


addEventHandler( "onClientGUIMouseDown", getRootElement( ),
    function ( btn, x, y )
        if btn == "left" then
            clickedElement = source; -- store the clicked element in a global variable
            local elementPos = { guiGetPosition( source, false ) };
            offsetPos = { x - elementPos[ 1 ], y - elementPos[ 2 ] }; -- get the offset position
        end
    end
);

addEventHandler( "onClientGUIMouseUp", getRootElement( ),
    function ( btn, x, y )
        if btn == "left" then
            clickedElement = nil;
        end
    end
);

addEventHandler( "onClientCursorMove", getRootElement( ),
    function ( _, _, x, y )
        if clickedElement then
            guiSetPosition( clickedElement, x - offsetPos[ 1 ], y - offsetPos[ 2 ], false );
        end
    end
);

See Also

GUI events

Input

GUI


Client event functions



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