326 lines
8.5 KiB
Lua
326 lines
8.5 KiB
Lua
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------------------------------------------------------------------------------
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-- Callback handler
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------------------------------------------------------------------------------
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iup.callbacks = {} -- storage for the C callbacks
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function iup.CallMethod(name, ...)
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local ih = ... -- the first argument is always the iupHandle
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local lua_func = ih[name] -- use "gettable" to retrieve the Lua callback
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if (not lua_func) then
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return
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end
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if type(lua_func) == "function" then
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return lua_func(...)
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elseif type(lua_func) == "string" then
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local temp = self
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self = ih
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local result = iup.dostring(lua_func)
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self = temp
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return result
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else
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return iup.ERROR
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end
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end
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function iup.RegisterCallback(name, c_func, type)
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-- Store a C callback for future use
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if not iup.callbacks[name] then iup.callbacks[name] = {} end
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local cb = iup.callbacks[name]
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if type then
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cb[type] = c_func
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else
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cb[1] = c_func
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end
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end
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function iup.CallGlobalMethod(name, ...)
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local INDEX = string.upper(name)
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local cb = iup.callbacks[INDEX]
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if (not cb) then
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return
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end
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local lua_func = cb[2]
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if type(lua_func) == "function" then
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return lua_func(...)
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elseif type(lua_func) == "string" then
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return iup.dostring(lua_func)
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else
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return iup.ERROR
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end
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end
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function iup.SetGlobalCallback(name, lua_func)
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local INDEX = string.upper(name)
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local cb = iup.callbacks[INDEX]
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if (cb) then -- if a callback name
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if (lua_func) then
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local c_func = cb[1]
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iup.SetFunction(INDEX, c_func) -- set the pre-defined C callback
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else
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iup.SetFunction(INDEX, nil)
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end
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cb[2] = lua_func -- store also the Lua callback
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end
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end
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------------------------------------------------------------------------------
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-- Meta Methods
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------------------------------------------------------------------------------
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------------------------------------------------------------------------------
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-- this is a Lua table for control construction, see iup.WIDGET and iup.BOX
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-- not used by applications
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-- implements class inheritance for iupWidget
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local widget_gettable = function(widget, index)
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local p = widget
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local v
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while p do
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v = rawget(p, index)
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if v then
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return v
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end
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p = rawget(p, "parent")
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end
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return nil
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end
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iup.NewClass("iupWidget")
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iup.SetMethod("iupWidget", "__index", widget_gettable)
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------------------------------------------------------------------------------
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-- this is an Ihandle* with enhancements
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local ihandle_gettable = function(ih, index)
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local INDEX = string.upper(index)
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if (iup.callbacks[INDEX]) then
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local widget = iup.GetWidget(ih)
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if (not widget or type(widget)~="table") then error("invalid IUP handle") end
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return widget[index]
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else
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local value = iup.GetAttribute(ih, INDEX)
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if (not value) then
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local widget = iup.GetWidget(ih)
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if (not widget or type(widget)~="table") then error("invalid IUP handle") end
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return widget[index]
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elseif type(value)== "number" or type(value) == "string" then
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local ih = iup.GetHandle(value)
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if ih then
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return ih
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else
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return value
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end
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else
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return value
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end
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end
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end
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local ihandle_settable = function(ih, index, value)
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local ti = type(index)
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local tv = type(value)
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local widget = iup.GetWidget(ih)
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if (not widget or type(widget)~="table") then error("invalid IUP handle") end
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if ti == "number" or ti == "string" then -- check if a valid C name
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local INDEX = string.upper(index)
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local cb = iup.callbacks[INDEX]
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if (cb) then -- if a callback name
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local c_func = cb[1]
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if (not c_func) then
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c_func = cb[iup.GetClassName(ih)]
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end
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iup.SetCallback(ih, INDEX, c_func, value) -- set the pre-defined C callback
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widget[index] = value -- store also in Lua
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elseif iup.GetClass(value) == "iupHandle" then -- if an iupHandle
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local name = iup.SetHandleName(value)
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iup.SetAttribute(ih, INDEX, name)
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widget[index] = nil -- if there was something in Lua remove it
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elseif tv == "string" or tv == "number" or tv == "nil" then -- if a common value
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iup.SetAttribute(ih, INDEX, value)
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widget[index] = nil -- if there was something in Lua remove it
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else
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widget[index] = value -- store only in Lua
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end
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else
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widget[index] = value -- store only in Lua
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end
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end
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iup.NewClass("iupHandle")
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iup.SetMethod("iupHandle", "__index", ihandle_gettable)
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iup.SetMethod("iupHandle", "__newindex", ihandle_settable)
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iup.SetMethod("iupHandle", "__tostring", iup.ihandle_tostring) -- implemented in C
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iup.SetMethod("iupHandle", "__eq", iup.ihandle_compare) -- implemented in C
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------------------------------------------------------------------------------
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-- Utilities
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------------------------------------------------------------------------------
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function iup.SetHandleName(v) -- used also by radio and zbox
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local name = iup.GetName(v)
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if not name then
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local autoname = string.format("_IUPLUA_NAME(%s)", tostring(v))
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iup.SetHandle(autoname, v)
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return autoname
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end
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return name
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end
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function iup.RegisterWidget(ctrl) -- called by all the controls initialization functions
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iup[ctrl.nick] = function(param)
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if (not ctrl.constructor) then
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error("IUP constructor missing for:" .. ctrl.nick)
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end
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return ctrl:constructor(param)
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end
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end
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function iup.RegisterHandle(ih, typename)
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iup.SetClass(ih, "iupHandle")
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local widget = iup.GetWidget(ih)
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if not widget then
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local class = iup[string.upper(typename)]
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if not class then
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if (iup.IsContainer(ih)) then
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class = iup.BOX
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else
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class = iup.WIDGET
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end
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end
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local widget = {
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parent = class,
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ihandle = ih
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}
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iup.SetClass(widget, "iupWidget")
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iup.SetWidget(ih, widget)
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end
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return ih
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end
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------------------------------------------------------------------------------
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-- Widget class (top class)
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------------------------------------------------------------------------------
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iup.WIDGET = {
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callback = {}
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}
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function iup.WIDGET.constructor(class, param)
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local ih = class:createElement(param) -- all classes must define createElement
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local widget = {
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parent = class,
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ihandle = ih
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}
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iup.SetClass(ih, "iupHandle")
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iup.SetClass(widget, "iupWidget")
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iup.SetWidget(ih, widget)
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widget:setAttributes(param)
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return ih
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end
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function iup.WIDGET.setAttributes(widget, param)
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local ih = widget.ihandle
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for i,v in pairs(param) do
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if type(i) == "number" and iup.GetClass(v) == "iupHandle" then
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-- We should not set this or other elements (such as iuptext)
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-- will erroneosly inherit it
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rawset(widget, i, v)
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else
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-- this will call settable metamethod
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ih[i] = v
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end
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end
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end
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function iup.WIDGET.show(ih)
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iup.Show(ih)
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end
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function iup.WIDGET.hide(ih)
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iup.Hide(ih)
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end
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function iup.WIDGET.map(ih)
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iup.Map(ih)
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end
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function iup.WIDGET.unmap(ih)
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iup.Unmap(ih)
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end
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function iup.WIDGET.detach(ih)
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iup.Detach(ih)
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end
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function iup.WIDGET.destroy(ih)
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iup.Destroy(ih)
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end
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-- all the objects in the hierarchy must be "iupWidget"
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-- Must repeat this call for every new widget
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iup.SetClass(iup.WIDGET, "iupWidget")
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------------------------------------------------------------------------------
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-- Box class (inherits from WIDGET)
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------------------------------------------------------------------------------
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iup.BOX = {
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parent = iup.WIDGET
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}
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function iup.BOX.setAttributes(widget, param)
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-- iup.Append will be automatically called after createElement
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-- no need to pass elements in the constructor of boxes
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local ih = widget.ihandle
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local n = #param
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for i = 1, n do
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if iup.GetClass(param[i]) == "iupHandle" then
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iup.Append(ih, param[i])
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end
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end
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iup.WIDGET.setAttributes(widget, param)
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end
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function iup.BOX.append(ih, child)
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return iup.Append(ih, child)
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end
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function iup.BOX.insert(ih, ref_child, child)
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return iup.Insert(ih, ref_child, child)
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end
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iup.SetClass(iup.BOX, "iupWidget")
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------------------------------------------------------------------------------
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-- Compatibility functions.
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------------------------------------------------------------------------------
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function iup.RGB(r, g, b)
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return string.format("%d %d %d", 255*r, 255*g, 255*b)
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end
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-- This will allow both names to be used in the same application
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-- also will allow static linking to work with require for the main library (only)
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if _G.package then
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_G.package.loaded["iuplua"] = iup
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iup._M = iup
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iup._PACKAGE = "iuplua"
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end
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function iup.layoutdialog(obj)
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return iup.LayoutDialog(obj[1])
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end
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