core.ui.choicedialog

This module provides a single-choice selection dialog for the terminal UI system.

TIP

To use this module, you need to import it first: import("core.ui.choicedialog")

NOTE

The UI module is primarily used for xmake's internal xmake f --menu menu-based visual configuration. It provides basic UI components that can also be used by users to implement their own terminal UIs.

The choicedialog module extends boxdialog and provides a single-choice selection dialog. It contains a choicebox for displaying options and a scrollbar for long lists.

choicedialog:new

• Create a new choice dialog instance

Function Prototype

API

choicedialog:new(name: <string>, bounds: <rect>, title: <string>)

Parameter Description

Parameter	Description
name	Required. Dialog name string
bounds	Required. Dialog bounds rectangle
title	Required. Dialog title string

Return Value

Type	Description
choicedialog	Returns a choice dialog instance

Usage

Create a choice dialog:

import("core.ui.choicedialog")
import("core.ui.rect")

local dialog = choicedialog:new("choice", rect{10, 5, 50, 20}, "Select Option")

choicedialog:choicebox

• Get the choice list box

Function Prototype

API

choicedialog:choicebox()

Parameter Description

No parameters

Return Value

Type	Description
choicebox	Returns the choice list box instance

Usage

Access the choice list box to load options:

local choicebox = dialog:choicebox()
choicebox:load({"Option 1", "Option 2", "Option 3"}, 1)

choicedialog:scrollbar_box

• Get the scrollbar component

Function Prototype

API

choicedialog:scrollbar_box()

Parameter Description

No parameters

Return Value

Type	Description
scrollbar	Returns the scrollbar instance

Usage

Access the scrollbar component for customization:

local scrollbar = dialog:scrollbar_box()
scrollbar:show(true)

choicedialog:on_event

• Handle dialog events

Function Prototype

API

choicedialog:on_event(e: <event>)

Parameter Description

Parameter	Description
e	Required. Event object

Return Value

Type	Description
boolean	Returns true if the event was handled, otherwise returns false

Usage

The dialog automatically handles the following events:

• Up/Down: Navigate options
• Space: Confirm selection

Here is a complete choice dialog example:

import("core.ui.choicedialog")
import("core.ui.rect")
import("core.ui.event")
import("core.ui.application")
import("core.ui.action")

local demo = application()

function demo:init()
    application.init(self, "demo")
    self:background_set("blue")
    
    -- Create choice dialog
    local dialog = choicedialog:new("choice", rect{1, 1, self:width() - 1, self:height() - 1}, "Select Compiler")
    
    -- Load options
    local options = {"gcc", "clang", "msvc"}
    dialog:choicebox():load(options, 1)
    
    -- Set selection event
    dialog:choicebox():action_set(action.ac_on_selected, function (v, index, value)
        print("Selected:", value, "(index:", index, ")")
    end)
    
    -- Handle select button
    dialog:button("select"):action_set(action.ac_on_enter, function (v, e)
        local current = dialog:choicebox():current()
        if current then
            local value = current:extra("value")
            local index = current:extra("index")
            print("Final choice:", value, "(index:", index, ")")
        end
        self:quit()
    end)
    
    self:insert(dialog)
    self._dialog = dialog
end

function demo:on_resize()
    self._dialog:bounds_set(rect{1, 1, self:width() - 1, self:height() - 1})
    application.on_resize(self)
end

function main(...)
    demo:run(...)
end