diff options
Diffstat (limited to 'builtin/fstk/buttonbar.lua')
| -rw-r--r-- | builtin/fstk/buttonbar.lua | 209 |
1 files changed, 209 insertions, 0 deletions
diff --git a/builtin/fstk/buttonbar.lua b/builtin/fstk/buttonbar.lua new file mode 100644 index 000000000..f5ac8905e --- /dev/null +++ b/builtin/fstk/buttonbar.lua @@ -0,0 +1,209 @@ +--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_dec_%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 |