Combobox.clear() | LuaRT free and open source Windows programming framework for Lua

Combobox:clear() method

Remove all items from the Combobox.

Return value

This function returns no value.

Example


local ui = require "ui"

-- create a simple Window 
local win = ui.Window("Combobox:clear() sample", "fixed", 320, 110)
local label = ui.Label(win, "New item  :", 10, 25)
local entry =  ui.Entry(win, "", label.x+label.width+6, label.y-4)
local button = ui.Button(win, "Add item", entry.x+entry.width+6, label.y-6)
local combobox = ui.Combobox(win, {}, button.x+button.width+6, label.y-4)
local clearbtn = ui.Button(win, "Clear all", 230, 54)

function clearbtn:onClick()
    combobox:clear()
end

function button:onClick()
    -- add new item in the Combobox adn select it
    combobox:add(entry.text)
    combobox.selected = combobox.items[#combobox.items]
    entry.text = ""
    win:status("Combobox.count = "..combobox.count)
end

-- enable button only if entry.text is not empty
function entry:onChange()
    button.enabled = #entry.text > 0
end

entry.onSelect = button.onClick

entry:onChange()
win:status("Combobox.count = 0")
win:show()

-- update user interface
repeat
    ui.update()
until not win.visible