core.ui.action

This module defines action enumeration constants for the UI system.

TIP

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

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 action module provides type constants for UI event callback actions, used to set and handle various UI events.

Predefined Action Types

The action module defines the following predefined action types:

Action	Description
action.ac_on_text_changed	Triggered when text content changes
action.ac_on_selected	Triggered when an item is selected
action.ac_on_clicked	Triggered when clicked
action.ac_on_resized	Triggered when resized
action.ac_on_scrolled	Triggered when scrolled
action.ac_on_enter	Triggered when confirmed/entered
action.ac_on_load	Triggered when loaded
action.ac_on_save	Triggered when saved
action.ac_on_exit	Triggered when exiting

Usage

These action constants are used to set event callback handlers:

import("core.ui.action")
import("core.ui.button")

-- Create button
local btn = button:new("ok", rect{10, 5, 20, 1}, "OK")

-- Set click event
btn:action_set(action.ac_on_enter, function (v)
    print("Button clicked!")
end)

action:register

• Register custom action types

Function Prototype

API

action:register(tag: <string>, ...)

Parameter Description

Parameter	Description
tag	Required. Tag name for accumulating count
...	Variable arguments. Action constant names

Return Value

No return value

Usage

Register custom action types:

import("core.ui.action")

-- Register custom actions
action:register("ac_max",
    "ac_on_custom1",
    "ac_on_custom2",
    "ac_on_custom3"
)

-- Now can use these custom actions
some_view:action_set(action.ac_on_custom1, function (v)
    print("Custom action 1 triggered")
end)

Here is a complete usage example:

import("core.ui.action")
import("core.ui.button")
import("core.ui.rect")
import("core.ui.application")
import("core.ui.window")

local demo = application()

function demo:init()
    application.init(self, "demo")
    self:background_set("blue")
    
    -- Create window
    local win = window:new("main", rect{1, 1, self:width() - 1, self:height() - 1}, "Action Demo")
    
    -- Create buttons and set different events
    local btn1 = button:new("btn1", rect{5, 5, 20, 1}, "< Button1 >")
    local btn2 = button:new("btn2", rect{30, 5, 20, 1}, "< Button2 >")
    
    -- Set different event handlers
    btn1:action_set(action.ac_on_enter, function (v)
        print("Button 1 confirmed clicked")
    end)
    
    btn2:action_set(action.ac_on_enter, function (v)
        print("Button 2 confirmed clicked")
    end)
    
    -- Add buttons to window panel
    local panel = win:panel()
    panel:insert(btn1)
    panel:insert(btn2)
    
    -- Select first button
    panel:select(btn1)
    
    self:insert(win)
    self._win = win
end

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

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