dfhack/library/lua/gui/widgets.lua

709 lines
17 KiB
Lua

-- Simple widgets for screens
local _ENV = mkmodule('gui.widgets')
local gui = require('gui')
local utils = require('utils')
local dscreen = dfhack.screen
local function show_view(view,vis)
if view then
view.visible = vis
end
end
local function getval(obj)
if type(obj) == 'function' then
return obj()
else
return obj
end
end
local function map_opttab(tab,idx)
if tab then
return tab[idx]
else
return idx
end
end
------------
-- Widget --
------------
Widget = defclass(Widget, gui.View)
Widget.ATTRS {
frame = DEFAULT_NIL,
frame_inset = DEFAULT_NIL,
frame_background = DEFAULT_NIL,
}
function Widget:computeFrame(parent_rect)
local sw, sh = parent_rect.width, parent_rect.height
return gui.compute_frame_body(sw, sh, self.frame, self.frame_inset)
end
function Widget:onRenderFrame(dc, rect)
if self.frame_background then
dc:fill(rect, self.frame_background)
end
end
-----------
-- Panel --
-----------
Panel = defclass(Panel, Widget)
Panel.ATTRS {
on_render = DEFAULT_NIL,
}
function Panel:init(args)
self:addviews(args.subviews)
end
function Panel:onRenderBody(dc)
if self.on_render then self.on_render(dc) end
end
-----------
-- Pages --
-----------
Pages = defclass(Pages, Panel)
function Pages:init(args)
for _,v in ipairs(self.subviews) do
v.visible = false
end
self:setSelected(args.selected or 1)
end
function Pages:setSelected(idx)
if type(idx) ~= 'number' then
local key = idx
if type(idx) == 'string' then
key = self.subviews[key]
end
idx = utils.linear_index(self.subviews, key)
if not idx then
error('Unknown page: '..key)
end
end
show_view(self.subviews[self.selected], false)
self.selected = math.min(math.max(1, idx), #self.subviews)
show_view(self.subviews[self.selected], true)
end
function Pages:getSelected()
return self.selected, self.subviews[self.selected]
end
----------------
-- Edit field --
----------------
EditField = defclass(EditField, Widget)
EditField.ATTRS{
text = '',
text_pen = DEFAULT_NIL,
on_char = DEFAULT_NIL,
on_change = DEFAULT_NIL,
on_submit = DEFAULT_NIL,
}
function EditField:onRenderBody(dc)
dc:pen(self.text_pen or COLOR_LIGHTCYAN):fill(0,0,dc.width-1,0)
local cursor = '_'
if not self.active or gui.blink_visible(300) then
cursor = ' '
end
local txt = self.text .. cursor
if #txt > dc.width then
txt = string.char(27)..string.sub(txt, #txt-dc.width+2)
end
dc:string(txt)
end
function EditField:onInput(keys)
if self.on_submit and keys.SELECT then
self.on_submit(self.text)
return true
elseif keys._STRING then
local old = self.text
if keys._STRING == 0 then
self.text = string.sub(old, 1, #old-1)
else
local cv = string.char(keys._STRING)
if not self.on_char or self.on_char(cv, old) then
self.text = old .. cv
end
end
if self.on_change and self.text ~= old then
self.on_change(self.text, old)
end
return true
end
end
-----------
-- Label --
-----------
function parse_label_text(obj)
local text = obj.text or {}
if type(text) ~= 'table' then
text = { text }
end
local curline = nil
local out = { }
local active = nil
local idtab = nil
for _,v in ipairs(text) do
local vv
if type(v) == 'string' then
vv = utils.split_string(v, NEWLINE)
else
vv = { v }
end
for i = 1,#vv do
local cv = vv[i]
if i > 1 then
if not curline then
table.insert(out, {})
end
curline = nil
end
if cv ~= '' then
if not curline then
curline = {}
table.insert(out, curline)
end
if type(cv) == 'string' then
table.insert(curline, { text = cv })
else
table.insert(curline, cv)
if cv.on_activate then
active = active or {}
table.insert(active, cv)
end
if cv.id then
idtab = idtab or {}
idtab[cv.id] = cv
end
end
end
end
end
obj.text_lines = out
obj.text_active = active
obj.text_ids = idtab
end
local function is_disabled(token)
return (token.disabled ~= nil and getval(token.disabled)) or
(token.enabled ~= nil and not getval(token.enabled))
end
function render_text(obj,dc,x0,y0,pen,dpen,disabled)
local width = 0
for iline,line in ipairs(obj.text_lines) do
local x = 0
if dc then
dc:seek(x+x0,y0+iline-1)
end
for _,token in ipairs(line) do
token.line = iline
token.x1 = x
if token.gap then
x = x + token.gap
if dc then
dc:advance(token.gap)
end
end
if token.tile then
x = x + 1
if dc then
dc:char(nil, token.tile)
end
end
if token.text or token.key then
local text = getval(token.text) or ''
local keypen
if dc then
local tpen = getval(token.pen)
if disabled or is_disabled(token) then
dc:pen(getval(token.dpen) or tpen or dpen)
keypen = COLOR_GREEN
else
dc:pen(tpen or pen)
keypen = COLOR_LIGHTGREEN
end
end
x = x + #text
if token.key then
local keystr = gui.getKeyDisplay(token.key)
local sep = token.key_sep or ''
x = x + #keystr
if sep == '()' then
if dc then
dc:string(text)
dc:string(' ('):string(keystr,keypen):string(')')
end
x = x + 3
else
if dc then
dc:string(keystr,keypen):string(sep):string(text)
end
x = x + #sep
end
else
if dc then
dc:string(text)
end
end
end
token.x2 = x
end
width = math.max(width, x)
end
obj.text_width = width
end
function check_text_keys(self, keys)
if self.text_active then
for _,item in ipairs(self.text_active) do
if item.key and keys[item.key] and not is_disabled(item) then
item.on_activate()
return true
end
end
end
end
Label = defclass(Label, Widget)
Label.ATTRS{
text_pen = COLOR_WHITE,
text_dpen = COLOR_DARKGREY,
disabled = DEFAULT_NIL,
enabled = DEFAULT_NIL,
auto_height = true,
auto_width = false,
}
function Label:init(args)
self:setText(args.text)
end
function Label:setText(text)
self.text = text
parse_label_text(self)
if self.auto_height then
self.frame = self.frame or {}
self.frame.h = self:getTextHeight()
end
end
function Label:preUpdateLayout()
if self.auto_width then
self.frame = self.frame or {}
self.frame.w = self:getTextWidth()
end
end
function Label:itemById(id)
if self.text_ids then
return self.text_ids[id]
end
end
function Label:getTextHeight()
return #self.text_lines
end
function Label:getTextWidth()
render_text(self)
return self.text_width
end
function Label:onRenderBody(dc)
render_text(self,dc,0,0,self.text_pen,self.text_dpen,is_disabled(self))
end
function Label:onInput(keys)
if not is_disabled(self) then
return check_text_keys(self, keys)
end
end
----------
-- List --
----------
List = defclass(List, Widget)
STANDARDSCROLL = {
STANDARDSCROLL_UP = -1,
STANDARDSCROLL_DOWN = 1,
STANDARDSCROLL_PAGEUP = '-page',
STANDARDSCROLL_PAGEDOWN = '+page',
}
SECONDSCROLL = {
SECONDSCROLL_UP = -1,
SECONDSCROLL_DOWN = 1,
SECONDSCROLL_PAGEUP = '-page',
SECONDSCROLL_PAGEDOWN = '+page',
}
List.ATTRS{
text_pen = COLOR_CYAN,
cursor_pen = COLOR_LIGHTCYAN,
inactive_pen = DEFAULT_NIL,
on_select = DEFAULT_NIL,
on_submit = DEFAULT_NIL,
row_height = 1,
scroll_keys = STANDARDSCROLL,
icon_width = DEFAULT_NIL,
}
function List:init(info)
self.page_top = 1
self.page_size = 1
self:setChoices(info.choices, info.selected)
end
function List:setChoices(choices, selected)
self.choices = choices or {}
for i,v in ipairs(self.choices) do
if type(v) ~= 'table' then
v = { text = v }
self.choices[i] = v
end
v.text = v.text or v.caption or v[1]
parse_label_text(v)
end
self:setSelected(selected)
end
function List:setSelected(selected)
self.selected = selected or self.selected or 1
self:moveCursor(0, true)
return self.selected
end
function List:getChoices()
return self.choices
end
function List:getSelected()
if #self.choices > 0 then
return self.selected, self.choices[self.selected]
end
end
function List:getContentWidth()
local width = 0
for i,v in ipairs(self.choices) do
render_text(v)
local roww = v.text_width
if v.key then
roww = roww + 3 + #gui.getKeyDisplay(v.key)
end
width = math.max(width, roww)
end
return width + (self.icon_width or 0)
end
function List:getContentHeight()
return #self.choices * self.row_height
end
function List:postComputeFrame(body)
self.page_size = math.max(1, math.floor(body.height / self.row_height))
self:moveCursor(0)
end
function List:moveCursor(delta, force_cb)
local page = math.max(1, self.page_size)
local cnt = #self.choices
if cnt < 1 then
self.page_top = 1
self.selected = 1
return
end
local off = self.selected+delta-1
local ds = math.abs(delta)
if ds > 1 then
if off >= cnt+ds-1 then
off = 0
else
off = math.min(cnt-1, off)
end
if off <= -ds then
off = cnt-1
else
off = math.max(0, off)
end
end
self.selected = 1 + off % cnt
self.page_top = 1 + page * math.floor((self.selected-1) / page)
if (force_cb or delta ~= 0) and self.on_select then
self.on_select(self:getSelected())
end
end
function List:onRenderBody(dc)
local choices = self.choices
local top = self.page_top
local iend = math.min(#choices, top+self.page_size-1)
local iw = self.icon_width
for i = top,iend do
local obj = choices[i]
local current = (i == self.selected)
local cur_pen = self.cursor_pen
local cur_dpen = self.text_pen
if not self.active then
cur_pen = self.inactive_pen or self.cursor_pen
end
local y = (i - top)*self.row_height
if iw and obj.icon then
local icon = getval(obj.icon)
if icon then
dc:seek(0, y)
if type(icon) ~= 'string' then
dc:char(nil,icon)
else
if current then
dc:string(icon, obj.icon_pen or self.icon_pen or cur_pen)
else
dc:string(icon, obj.icon_pen or self.icon_pen or cur_dpen)
end
end
end
end
render_text(obj, dc, iw or 0, y, cur_pen, cur_dpen, not current)
if obj.key then
local keystr = gui.getKeyDisplay(obj.key)
dc:seek(dc.width-2-#keystr,y):pen(self.text_pen)
dc:string('('):string(keystr,COLOR_LIGHTGREEN):string(')')
end
end
end
function List:submit()
if self.on_submit and #self.choices > 0 then
self.on_submit(self:getSelected())
end
end
function List:onInput(keys)
if self.on_submit and keys.SELECT then
self:submit()
return true
else
for k,v in pairs(self.scroll_keys) do
if keys[k] then
if v == '+page' then
v = self.page_size
elseif v == '-page' then
v = -self.page_size
end
self:moveCursor(v)
return true
end
end
for i,v in ipairs(self.choices) do
if v.key and keys[v.key] then
self:setSelected(i)
self:submit()
return true
end
end
local current = self.choices[self.selected]
if current then
return check_text_keys(current, keys)
end
end
end
-------------------
-- Filtered List --
-------------------
FilteredList = defclass(FilteredList, Widget)
function FilteredList:init(info)
self.edit = EditField{
text_pen = info.edit_pen or info.cursor_pen,
frame = { l = info.icon_width, t = 0 },
on_change = self:callback('onFilterChange'),
on_char = self:callback('onFilterChar'),
}
self.list = List{
frame = { t = 2 },
text_pen = info.text_pen,
cursor_pen = info.cursor_pen,
inactive_pen = info.inactive_pen,
icon_pen = info.icon_pen,
row_height = info.row_height,
scroll_keys = info.scroll_keys,
icon_width = info.icon_width,
}
if info.on_select then
self.list.on_select = function()
return info.on_select(self:getSelected())
end
end
if info.on_submit then
self.list.on_submit = function()
return info.on_submit(self:getSelected())
end
end
self.not_found = Label{
visible = false,
text = info.not_found_label or 'No matches',
text_pen = COLOR_LIGHTRED,
frame = { l = info.icon_width, t = 2 },
}
self:addviews{ self.edit, self.list, self.not_found }
self:setChoices(info.choices, info.selected)
end
function FilteredList:getChoices()
return self.choices
end
function FilteredList:setChoices(choices, pos)
choices = choices or {}
self.choices = choices
self.edit.text = ''
self.list:setChoices(choices, pos)
self.not_found.visible = (#choices == 0)
end
function FilteredList:submit()
return self.list:submit()
end
function FilteredList:canSubmit()
return not self.not_found.visible
end
function FilteredList:getSelected()
local i,v = self.list:getSelected()
if i then
return map_opttab(self.choice_index, i), v
end
end
function FilteredList:getContentWidth()
return self.list:getContentWidth()
end
function FilteredList:getContentHeight()
return self.list:getContentHeight() + 2
end
function FilteredList:getFilter()
return self.edit.text, self.list.choices
end
function FilteredList:setFilter(filter, pos)
local choices = self.choices
local cidx = nil
filter = filter or ''
self.edit.text = filter
if filter ~= '' then
local tokens = utils.split_string(filter, ' ')
local ipos = pos
choices = {}
cidx = {}
pos = nil
for i,v in ipairs(self.choices) do
local ok = true
local search_key = v.search_key or v.text
for _,key in ipairs(tokens) do
if key ~= '' and not string.match(search_key, '%f[^%s\x00]'..key) then
ok = false
break
end
end
if ok then
table.insert(choices, v)
cidx[#choices] = i
if ipos == i then
pos = #choices
end
end
end
end
self.choice_index = cidx
self.list:setChoices(choices, pos)
self.not_found.visible = (#choices == 0)
end
function FilteredList:onFilterChange(text)
self:setFilter(text)
end
local bad_chars = {
['%'] = true, ['.'] = true, ['+'] = true, ['*'] = true,
['['] = true, [']'] = true, ['('] = true, [')'] = true,
}
function FilteredList:onFilterChar(char, text)
if bad_chars[char] then
return false
end
if char == ' ' then
return string.match(text, '%S$')
end
return true
end
return _ENV