112 lines
2.4 KiB
Lua
112 lines
2.4 KiB
Lua
--
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-- Event-driven GUI library
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--
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--
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gui = {
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--
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-- dialog() --
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--
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dialog = function(args)
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local dia = {
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title = args.title,
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w = args.w,
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h = args.h,
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--
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widgets = {},
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-- an indexed array, starting at 1. Used for calling the relevant
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-- callback when a numbered control is clicked.
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callbacks = {},
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--
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-- dialog.run() --
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--
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run = function(this)
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windowopen(this.w,this.h, this.title or "");
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-- examine all elements
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for _,widget in ipairs(this.widgets) do
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widget:render()
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end
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repeat
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local button, button2, key = windowdodialog();
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if button > 0 then
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local c = this.callbacks[button]
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-- run the callback and stop the form if it returns true
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if c ~= nil and c(this) then
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break;
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end
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end
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until key == 27;
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windowclose();
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end
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}
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local id = 1;
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-- examine all elements
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for _,value in ipairs(args) do
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-- all arguments that are tables are assumed to be widgets
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if type(value)=="table" then
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table.insert(dia.widgets, value)
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-- clickable widgets take up an auto-numbered id
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if (value.click) then
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dia.callbacks[id] = value.click
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id=id+1
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end
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end
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end
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return dia;
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end,
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--
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-- button() --
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--
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button = function(args)
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local but = {
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x = args.x,
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y = args.y,
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w = args.w,
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h = args.h,
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key = args.key,
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label = args.label,
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click = args.click or donothing,
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render = args.repeatable and function(this)
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windowrepeatbutton(this.x, this.y, this.w, this.h, this.label, this.key or -1);
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end
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or function(this)
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windowbutton(this.x, this.y, this.w, this.h, this.label, this.key or -1);
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end
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}
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return but;
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end,
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--
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-- label() --
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--
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label = function(args)
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local fld = {
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x = args.x,
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y = args.y,
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value = args.value,
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format = args.format,
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fg = args.fg or 0,
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bg = args.bg or 2,
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render = function(this)
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if type(this.format) then
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windowprint(this.x, this.y, string.format(this.format, this.value), this.fg, this.bg);
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else
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windowprint(this.x, this.y, this.value, this.fg, this.bg);
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end
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end
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}
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return fld;
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end,
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-- "do nothing" function. Used as default callback
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donothing = function(this)
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end
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}
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