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--Minetest
--Copyright (C) 2014 sapier
--
--self program is free software; you can redistribute it and/or modify
--it under the terms of the GNU Lesser General Public License as published by
--the Free Software Foundation; either version 2.1 of the License, or
--(at your option) any later version.
--
--self program is distributed in the hope that it will be useful,
--but WITHOUT ANY WARRANTY; without even the implied warranty of
--MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
--GNU Lesser General Public License for more details.
--
--You should have received a copy of the GNU Lesser General Public License along
--with self program; if not, write to the Free Software Foundation, Inc.,
--51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
local function buttonbar_formspec(self)
if self.hidden then
return ""
end
local formspec = string.format("box[%f,%f;%f,%f;%s]",
self.pos.x,self.pos.y ,self.size.x,self.size.y,self.bgcolor)
for i=self.startbutton,#self.buttons,1 do
local btn_name = self.buttons[i].name
local btn_pos = {}
if self.orientation == "horizontal" then
btn_pos.x = self.pos.x + --base pos
(i - self.startbutton) * self.btn_size + --button offset
self.btn_initial_offset
else
btn_pos.x = self.pos.x + (self.btn_size * 0.05)
end
if self.orientation == "vertical" then
btn_pos.y = self.pos.y + --base pos
(i - self.startbutton) * self.btn_size + --button offset
self.btn_initial_offset
else
btn_pos.y = self.pos.y + (self.btn_size * 0.05)
end
if (self.orientation == "vertical" and
(btn_pos.y + self.btn_size <= self.pos.y + self.size.y)) or
(self.orientation == "horizontal" and
(btn_pos.x + self.btn_size <= self.pos.x + self.size.x)) then
local borders="true"
if self.buttons[i].image ~= nil then
borders="false"
end
formspec = formspec ..
string.format("image_button[%f,%f;%f,%f;%s;%s;%s;true;%s]",
btn_pos.x, btn_pos.y, self.btn_size, self.btn_size,
self.buttons[i].image, btn_name, self.buttons[i].caption,
borders)
else
--print("end of displayable buttons: orientation: " .. self.orientation)
--print( "button_end: " .. (btn_pos.y + self.btn_size - (self.btn_size * 0.05)))
--print( "bar_end: " .. (self.pos.x + self.size.x))
break
end
end
if (self.have_move_buttons) then
local btn_dec_pos = {}
btn_dec_pos.x = self.pos.x + (self.btn_size * 0.05)
btn_dec_pos.y = self.pos.y + (self.btn_size * 0.05)
local btn_inc_pos = {}
local btn_size = {}
if self.orientation == "horizontal" then
btn_size.x = 0.5
btn_size.y = self.btn_size
btn_inc_pos.x = self.pos.x + self.size.x - 0.5
btn_inc_pos.y = self.pos.y + (self.btn_size * 0.05)
else
btn_size.x = self.btn_size
btn_size.y = 0.5
btn_inc_pos.x = self.pos.x + (self.btn_size * 0.05)
btn_inc_pos.y = self.pos.y + self.size.y - 0.5
end
local text_dec = "<"
local text_inc = ">"
if self.orientation == "vertical" then
text_dec = "^"
text_inc = "v"
end
formspec = formspec ..
string.format("image_button[%f,%f;%f,%f;;btnbar_dec_%s;%s;true;true]",
btn_dec_pos.x, btn_dec_pos.y, btn_size.x, btn_size.y,
self.name, text_dec)
formspec = formspec ..
string.format("image_button[%f,%f;%f,%f;;btnbar_inc_%s;%s;true;true]",
btn_inc_pos.x, btn_inc_pos.y, btn_size.x, btn_size.y,
self.name, text_inc)
end
return formspec
end
local function buttonbar_buttonhandler(self, fields)
if fields["btnbar_inc_" .. self.name] ~= nil and
self.startbutton < #self.buttons then
self.startbutton = self.startbutton + 1
return true
end
if fields["btnbar_dec_" .. self.name] ~= nil and self.startbutton > 1 then
self.startbutton = self.startbutton - 1
return true
end
for i=1,#self.buttons,1 do
if fields[self.buttons[i].name] ~= nil then
return self.userbuttonhandler(fields)
end
end
end
local buttonbar_metatable = {
handle_buttons = buttonbar_buttonhandler,
handle_events = function(self, event) end,
get_formspec = buttonbar_formspec,
hide = function(self) self.hidden = true end,
show = function(self) self.hidden = false end,
delete = function(self) ui.delete(self) end,
add_button = function(self, name, caption, image)
if caption == nil then caption = "" end
if image == nil then image = "" end
table.insert(self.buttons,{ name=name, caption=caption, image=image})
if self.orientation == "horizontal" then
if ( (self.btn_size * #self.buttons) + (self.btn_size * 0.05 *2)
> self.size.x ) then
self.btn_initial_offset = self.btn_size * 0.05 + 0.5
self.have_move_buttons = true
end
else
if ((self.btn_size * #self.buttons) + (self.btn_size * 0.05 *2)
> self.size.y ) then
self.btn_initial_offset = self.btn_size * 0.05 + 0.5
self.have_move_buttons = true
end
end
end,
set_bgparams = function(self, bgcolor)
if (type(bgcolor) == "string") then
self.bgcolor = bgcolor
end
end,
}
buttonbar_metatable.__index = buttonbar_metatable
function buttonbar_create(name, cbf_buttonhandler, pos, orientation, size)
assert(name ~= nil)
assert(cbf_buttonhandler ~= nil)
assert(orientation == "vertical" or orientation == "horizontal")
assert(pos ~= nil and type(pos) == "table")
assert(size ~= nil and type(size) == "table")
local self = {}
self.name = name
self.type = "addon"
self.bgcolor = "#000000"
self.pos = pos
self.size = size
self.orientation = orientation
self.startbutton = 1
self.have_move_buttons = false
self.hidden = false
if self.orientation == "horizontal" then
self.btn_size = self.size.y
else
self.btn_size = self.size.x
end
if (self.btn_initial_offset == nil) then
self.btn_initial_offset = self.btn_size * 0.05
end
self.userbuttonhandler = cbf_buttonhandler
self.buttons = {}
setmetatable(self,buttonbar_metatable)
ui.add(self)
return self
end
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