Picture:onHover() | LuaRT free and open source Windows programming framework for Lua

Picture:onHover(x, y, buttons) event

This event is fired when the user moves the mouse pointer over the Picture.

Parameters

The horizontal position of the mouse in the Picture area (zero means the left border of the widget).

The vertical position of the mouse in the Picture area (zero means the top border of the widget).

buttons

A table which fields indicates if mouse buttons or special keys have been pressed during the move :

"left": true if left mouse button is pressed, false otherwise
"right": true if right mouse button is pressed, false otherwise
"middle": true if middle mouse button is pressed, false otherwise
"control": true if the CONTROL key is pressed, false otherwise
"shift": true if the SHIFT mouse button is pressed, false otherwise

Return value

The event returns no value.

Example


local ui = require "ui"

-- create a simple window 
local win = ui.Window("Picture:onHover() sample", 340, 200)
local picture = ui.Picture(win, "LuaRT.png", -74)
local factor = 1
local delta = 0

function picture:onHover()
    delta = -0.01
    factor = factor - 0.01
end

function picture:onLeave()
    delta = 0.01
    factor = factor + 0.01
end


win:show()

repeat
    ui.update()
    if factor > 0 and factor < 1 then
        factor = factor + delta
        picture:resize(factor)
        picture:center()
    end
until win.visible == false