dfhack/library/lua/gui/widgets.lua

1339 lines
36 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
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',
}
------------
-- 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,
on_layout = DEFAULT_NIL,
autoarrange_subviews = false, -- whether to automatically lay out subviews
autoarrange_gap = 0, -- how many blank lines to insert between widgets
}
function Panel:init(args)
self:addviews(args.subviews)
end
function Panel:onRenderBody(dc)
if self.on_render then self.on_render(dc) end
end
function Panel:postComputeFrame(body)
if self.on_layout then self.on_layout(body) end
end
-- if self.autoarrange_subviews is true, lay out visible subviews vertically,
-- adding gaps between widgets according to self.autoarrange_gap.
function Panel:postUpdateLayout()
if not self.autoarrange_subviews then return end
local gap = self.autoarrange_gap
local y = 0
for _,subview in ipairs(self.subviews) do
if not subview.frame then goto continue end
subview.frame.t = y
if subview.visible then
y = y + (subview.frame.h or 0) + gap
end
::continue::
end
self.frame_rect.height = y
-- let widgets adjust to their new positions
self:updateSubviewLayout()
end
-------------------
-- ResizingPanel --
-------------------
ResizingPanel = defclass(ResizingPanel, Panel)
-- adjust our frame dimensions according to positions and sizes of our subviews
function ResizingPanel:postUpdateLayout(frame_body)
local w, h = 0, 0
for _,s in ipairs(self.subviews) do
if s.visible then
w = math.max(w, (s.frame and s.frame.l or 0) +
(s.frame and s.frame.w or frame_body.width))
h = math.max(h, (s.frame and s.frame.t or 0) +
(s.frame and s.frame.h or frame_body.height))
end
end
if not self.frame then self.frame = {} end
self.frame.w, self.frame.h = w, h
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
function Pages:getSelectedPage()
return self.subviews[self.selected]
end
----------------
-- Edit field --
----------------
EditField = defclass(EditField, Widget)
EditField.ATTRS{
label_text = DEFAULT_NIL,
text = '',
text_pen = DEFAULT_NIL,
on_char = DEFAULT_NIL,
on_change = DEFAULT_NIL,
on_submit = DEFAULT_NIL,
on_submit2 = DEFAULT_NIL,
key = DEFAULT_NIL,
key_sep = DEFAULT_NIL,
modal = false,
ignore_keys = DEFAULT_NIL,
}
function EditField:preinit(init_table)
init_table.frame = init_table.frame or {}
init_table.frame.h = init_table.frame.h or 1
end
function EditField:init()
local function on_activate()
self.saved_text = self.text
self:setFocus(true)
end
self.start_pos = 1
self.cursor = #self.text + 1
self:addviews{HotkeyLabel{frame={t=0,l=0},
key=self.key,
key_sep=self.key_sep,
label=self.label_text,
on_activate=self.key and on_activate or nil}}
end
function EditField:getPreferredFocusState()
return not self.key
end
function EditField:setCursor(cursor)
if not cursor or cursor > #self.text then
self.cursor = #self.text + 1
return
end
self.cursor = math.max(1, cursor)
end
function EditField:setText(text, cursor)
self.text = text
self:setCursor(cursor)
end
function EditField:postUpdateLayout()
self.text_offset = self.subviews[1]:getTextWidth()
end
function EditField:onRenderBody(dc)
dc:pen(self.text_pen or COLOR_LIGHTCYAN):fill(0,0,dc.width-1,0)
local cursor_char = '_'
if not self.active or not self.focus or gui.blink_visible(300) then
cursor_char = (self.cursor > #self.text) and ' ' or
self.text:sub(self.cursor, self.cursor)
end
local txt = self.text:sub(1, self.cursor - 1) .. cursor_char ..
self.text:sub(self.cursor + 1)
local max_width = dc.width - self.text_offset
self.start_pos = 1
if #txt > max_width then
-- get the substring in the vicinity of the cursor
max_width = max_width - 2
local half_width = math.floor(max_width/2)
local start_pos = math.max(1, self.cursor-half_width)
local end_pos = math.min(#txt, self.cursor+half_width-1)
if self.cursor + half_width > #txt then
start_pos = #txt - (max_width - 1)
end
if self.cursor - half_width <= 1 then
end_pos = max_width + 1
end
self.start_pos = start_pos > 1 and start_pos - 1 or start_pos
txt = ('%s%s%s'):format(start_pos == 1 and '' or string.char(27),
txt:sub(start_pos, end_pos),
end_pos == #txt and '' or string.char(26))
end
dc:advance(self.text_offset):string(txt)
dc:string((' '):rep(dc.clip_x2 - dc.x))
end
function EditField:onInput(keys)
if not self.focus then
-- only react to our hotkey
return self:inputToSubviews(keys)
end
if self.ignore_keys then
for _,ignore_key in ipairs(self.ignore_keys) do
if keys[ignore_key] then return false end
end
end
if self.key and keys.LEAVESCREEN then
local old = self.text
self:setText(self.saved_text)
if self.on_change and old ~= self.saved_text then
self.on_change(self.text, old)
end
self:setFocus(false)
return true
end
if keys.SELECT then
if self.key then
self:setFocus(false)
end
if self.on_submit then
self.on_submit(self.text)
return true
end
return not not self.key
elseif keys.SEC_SELECT then
if self.key then
self:setFocus(false)
end
if self.on_submit2 then
self.on_submit2(self.text)
return true
end
return not not self.key
elseif keys._MOUSE_L then
local mouse_x, mouse_y = self:getMousePos()
if mouse_x then
self:setCursor(self.start_pos + mouse_x)
return true
end
elseif keys._STRING then
local old = self.text
if keys._STRING == 0 then
-- handle backspace
local del_pos = self.cursor - 1
if del_pos > 0 then
self:setText(old:sub(1, del_pos-1) .. old:sub(del_pos+1),
del_pos)
end
else
local cv = string.char(keys._STRING)
if not self.on_char or self.on_char(cv, old) then
self:setText(old:sub(1,self.cursor-1)..cv..old:sub(self.cursor),
self.cursor + 1)
end
end
if self.on_change and self.text ~= old then
self.on_change(self.text, old)
end
return true
elseif keys.CURSOR_LEFT then
self:setCursor(self.cursor - 1)
return true
elseif keys.A_MOVE_W_DOWN then -- Ctrl-Left (end of prev word)
local _, prev_word_end = self.text:sub(1, self.cursor-1):
find('.*[%w_%-][^%w_%-]')
self:setCursor(prev_word_end or 1)
return true
elseif keys.A_CARE_MOVE_W then -- Alt-Left (home)
self:setCursor(1)
return true
elseif keys.CURSOR_RIGHT then
self:setCursor(self.cursor + 1)
return true
elseif keys.A_MOVE_E_DOWN then -- Ctrl-Right (beginning of next word)
local _,next_word_start = self.text:find('[^%w_%-][%w_%-]', self.cursor)
self:setCursor(next_word_start)
return true
elseif keys.A_CARE_MOVE_E then -- Alt-Right (end)
self:setCursor()
return true
end
-- if we're modal, then unconditionally eat all the input
return self.modal
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 = v:split(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 = dc and obj.start_line_num or 1, #obj.text_lines do
local x, line = 0, obj.text_lines[iline]
if dc then
local offset = (obj.start_line_num or 1) - 1
local y = y0 + iline - offset - 1
-- skip text outside of the containing frame
if y > dc.height - 1 then break end
dc:seek(x+x0, y)
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 = dfhack.pen.parse(token.key_pen or COLOR_LIGHTGREEN)
if dc then
local tpen = getval(token.pen)
if disabled or is_disabled(token) then
dc:pen(getval(token.dpen) or tpen or dpen)
if keypen.fg ~= COLOR_BLACK then
keypen.bold = false
end
else
dc:pen(tpen or pen)
end
end
local width = getval(token.width)
local padstr
if width then
x = x + width
if #text > width then
text = string.sub(text,1,width)
else
if token.pad_char then
padstr = string.rep(token.pad_char,width-#text)
end
if dc and token.rjustify then
if padstr then dc:string(padstr) else dc:advance(width-#text) end
end
end
else
x = x + #text
end
if token.key then
local keystr = gui.getKeyDisplay(token.key)
local sep = token.key_sep or ''
x = x + #keystr
if sep:startswith('()') then
if dc then
dc:string(text)
dc:string(' ('):string(keystr,keypen)
dc:string(sep:sub(2))
end
x = x + 1 + #sep
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
if width and dc and not token.rjustify then
if padstr then dc:string(padstr) else dc:advance(width-#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
text_hpen = DEFAULT_NIL, -- highlight - default is text_pen with reversed brightness
disabled = DEFAULT_NIL,
enabled = DEFAULT_NIL,
auto_height = true,
auto_width = false,
on_click = DEFAULT_NIL,
on_rclick = DEFAULT_NIL,
scroll_keys = STANDARDSCROLL,
show_scrollbar = DEFAULT_NIL, -- DEFAULT_NIL, 'right', 'left', false
scrollbar_fg = COLOR_LIGHTGREEN,
scrollbar_bg = COLOR_CYAN
}
function Label:init(args)
-- use existing saved text if no explicit text was specified. this avoids
-- overwriting pre-formatted text that subclasses may have already set
self:setText(args.text or self.text)
if not self.text_hpen then
self.text_hpen = ((tonumber(self.text_pen) or tonumber(self.text_pen.fg) or 0) + 8) % 16
end
end
function Label:setText(text)
self.start_line_num = 1
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:update_scroll_inset()
if self.show_scrollbar == nil then
self._show_scrollbar = self:getTextHeight() > self.frame_body.height and 'right' or false
else
self._show_scrollbar = self.show_scrollbar
end
if self._show_scrollbar then
-- here self._show_scrollbar can only be either
-- 'left' or any true value which we interpret as right
local l,t,r,b = gui.parse_inset(self.frame_inset)
if self._show_scrollbar == 'left' and l <= 0 then
l = 1
elseif r <= 0 then
r = 1
end
self.frame_inset = {l=l,t=t,r=r,b=b}
end
end
-- the position is the number of tiles of empty space above the top of the
-- scrollbar, and the height is the number of tiles the scrollbar should occupy
-- to represent the percentage of text that is on the screen.
local function get_scrollbar_pos_and_height(label)
local first_visible_line = label.start_line_num
local text_height = label:getTextHeight()
local last_visible_line = first_visible_line + label.frame_body.height - 1
local scrollbar_body_height = label.frame_body.height - 2
local displayed_lines = last_visible_line - first_visible_line
local height = math.floor(((displayed_lines-1) * scrollbar_body_height) /
text_height)
local max_pos = scrollbar_body_height - height
local pos = math.ceil(((first_visible_line-1) * max_pos) /
(text_height - label.frame_body.height))
return pos, height
end
local UP_ARROW_CHAR = string.char(24)
local DOWN_ARROW_CHAR = string.char(25)
local NO_ARROW_CHAR = string.char(32)
local BAR_CHAR = string.char(7)
local BAR_BG_CHAR = string.char(179)
function Label:render_scrollbar(dc, x, y1, y2)
-- render up arrow if we're not at the top
dc:seek(x, y1):char(
self.start_line_num == 1 and NO_ARROW_CHAR or UP_ARROW_CHAR,
self.scrollbar_fg, self.scrollbar_bg)
-- render scrollbar body
local pos, height = get_scrollbar_pos_and_height(self)
local starty = y1 + pos + 1
local endy = y1 + pos + height
for y=y1+1,y2-1 do
if y >= starty and y <= endy then
dc:seek(x, y):char(BAR_CHAR, self.scrollbar_fg)
else
dc:seek(x, y):char(BAR_BG_CHAR, self.scrollbar_bg)
end
end
-- render down arrow if we're not at the bottom
local last_visible_line = self.start_line_num + self.frame_body.height - 1
dc:seek(x, y2):char(
last_visible_line >= self:getTextHeight() and
NO_ARROW_CHAR or DOWN_ARROW_CHAR,
self.scrollbar_fg, self.scrollbar_bg)
end
function Label:computeFrame(parent_rect)
local frame_rect,body_rect = Label.super.computeFrame(self, parent_rect)
self.frame_rect = frame_rect
self.frame_body = parent_rect:viewport(body_rect or frame_rect)
self:update_scroll_inset() -- frame_body is now set
-- recalc with updated frame_inset
return Label.super.computeFrame(self, parent_rect)
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)
local text_pen = self.text_pen
if self:getMousePos() and (self.on_click or self.on_rclick) then
text_pen = self.text_hpen
end
render_text(self,dc,0,0,text_pen,self.text_dpen,is_disabled(self))
end
function Label:onRenderFrame(dc, rect)
if self._show_scrollbar then
local x = self._show_scrollbar == 'left'
and self.frame_body.x1-dc.x1-1
or self.frame_body.x2-dc.x1+1
self:render_scrollbar(dc,
x,
self.frame_body.y1-dc.y1,
self.frame_body.y2-dc.y1
)
end
end
function Label:click_scrollbar()
if not self._show_scrollbar then return end
local rect = self.frame_body
local x, y = dscreen.getMousePos()
if self._show_scrollbar == 'left' and x ~= rect.x1-1 or x ~= rect.x2+1 then
return
end
if y < rect.y1 or y > rect.y2 then
return
end
if y == rect.y1 then
return -1
elseif y == rect.y2 then
return 1
else
local pos, height = get_scrollbar_pos_and_height(self)
if y <= rect.y1 + pos then
return '-halfpage'
elseif y > rect.y1 + pos + height then
return '+halfpage'
end
end
return nil
end
function Label:scroll(nlines)
if not nlines then return end
if type(nlines) == 'string' then
if nlines == '+page' then
nlines = self.frame_body.height
elseif nlines == '-page' then
nlines = -self.frame_body.height
elseif nlines == '+halfpage' then
nlines = math.ceil(self.frame_body.height/2)
elseif nlines == '-halfpage' then
nlines = -math.ceil(self.frame_body.height/2)
else
error(('unhandled scroll keyword: "%s"'):format(nlines))
end
end
local n = self.start_line_num + nlines
n = math.min(n, self:getTextHeight() - self.frame_body.height + 1)
n = math.max(n, 1)
self.start_line_num = n
return nlines
end
function Label:onInput(keys)
if is_disabled(self) then return false end
if keys._MOUSE_L_DOWN then
if not self:scroll(self:click_scrollbar()) and
self:getMousePos() and self.on_click then
self:on_click()
end
end
if keys._MOUSE_R_DOWN and self:getMousePos() and self.on_rclick then
self:on_rclick()
end
for k,v in pairs(self.scroll_keys) do
if keys[k] then
self:scroll(v)
end
end
return check_text_keys(self, keys)
end
------------------
-- WrappedLabel --
------------------
WrappedLabel = defclass(WrappedLabel, Label)
WrappedLabel.ATTRS{
text_to_wrap=DEFAULT_NIL,
indent=0,
}
function WrappedLabel:getWrappedText(width)
-- 0 width can happen if the parent has 0 width
if not self.text_to_wrap or width <= 0 then return nil end
local text_to_wrap = getval(self.text_to_wrap)
if type(text_to_wrap) == 'table' then
text_to_wrap = table.concat(text_to_wrap, NEWLINE)
end
return text_to_wrap:wrap(width - self.indent)
end
-- we can't set the text in init() since we may not yet have a frame that we
-- can get wrapping bounds from.
function WrappedLabel:postComputeFrame()
local wrapped_text = self:getWrappedText(self.frame_body.width)
if not wrapped_text then return end
local text = {}
for _,line in ipairs(wrapped_text:split(NEWLINE)) do
table.insert(text, {gap=self.indent, text=line})
-- a trailing newline will get ignored so we don't have to manually trim
table.insert(text, NEWLINE)
end
self:setText(text)
end
------------------
-- TooltipLabel --
------------------
TooltipLabel = defclass(TooltipLabel, WrappedLabel)
TooltipLabel.ATTRS{
show_tooltip=DEFAULT_NIL,
indent=2,
text_pen=COLOR_GREY,
}
function TooltipLabel:preUpdateLayout()
self.visible = getval(self.show_tooltip)
end
-----------------
-- HotkeyLabel --
-----------------
HotkeyLabel = defclass(HotkeyLabel, Label)
HotkeyLabel.ATTRS{
key=DEFAULT_NIL,
key_sep=': ',
label=DEFAULT_NIL,
on_activate=DEFAULT_NIL,
}
function HotkeyLabel:init()
self:setText{{key=self.key, key_sep=self.key_sep, text=self.label,
on_activate=self.on_activate}}
end
function HotkeyLabel:onInput(keys)
if HotkeyLabel.super.onInput(self, keys) then
return true
elseif keys._MOUSE_L and self:getMousePos() then
self.on_activate()
return true
end
end
----------------------
-- CycleHotkeyLabel --
----------------------
CycleHotkeyLabel = defclass(CycleHotkeyLabel, Label)
CycleHotkeyLabel.ATTRS{
key=DEFAULT_NIL,
label=DEFAULT_NIL,
label_width=DEFAULT_NIL,
options=DEFAULT_NIL,
initial_option=1,
on_change=DEFAULT_NIL,
}
function CycleHotkeyLabel:init()
-- initialize option_idx
for i in ipairs(self.options) do
if self.initial_option == self:getOptionValue(i) then
self.option_idx = i
break
end
end
if not self.option_idx then
if self.options[self.initial_option] then
self.option_idx = self.initial_option
end
end
if not self.option_idx then
error(('cannot find option with value or index: "%s"')
:format(self.initial_option))
end
self:setText{
{key=self.key, key_sep=': ', text=self.label, width=self.label_width,
on_activate=self:callback('cycle')},
' ',
{text=self:callback('getOptionLabel')},
}
end
function CycleHotkeyLabel:cycle()
local old_option_idx = self.option_idx
if self.option_idx == #self.options then
self.option_idx = 1
else
self.option_idx = self.option_idx + 1
end
if self.on_change then
self.on_change(self:getOptionValue(),
self:getOptionValue(old_option_idx))
end
end
function CycleHotkeyLabel:getOptionLabel(option_idx)
option_idx = option_idx or self.option_idx
local option = self.options[option_idx]
if type(option) == 'table' then
return option.label
end
return option
end
function CycleHotkeyLabel:getOptionValue(option_idx)
option_idx = option_idx or self.option_idx
local option = self.options[option_idx]
if type(option) == 'table' then
return option.value
end
return option
end
function CycleHotkeyLabel:onInput(keys)
if CycleHotkeyLabel.super.onInput(self, keys) then
return true
elseif keys._MOUSE_L and self:getMousePos() then
self:cycle()
return true
end
end
-----------------------
-- ToggleHotkeyLabel --
-----------------------
ToggleHotkeyLabel = defclass(ToggleHotkeyLabel, CycleHotkeyLabel)
ToggleHotkeyLabel.ATTRS{
options={{label='On', value=true},
{label='Off', value=false}},
}
----------
-- List --
----------
List = defclass(List, Widget)
List.ATTRS{
text_pen = COLOR_CYAN,
cursor_pen = COLOR_LIGHTCYAN,
inactive_pen = DEFAULT_NIL,
on_select = DEFAULT_NIL,
on_submit = DEFAULT_NIL,
on_submit2 = DEFAULT_NIL,
row_height = 1,
scroll_keys = STANDARDSCROLL,
icon_width = DEFAULT_NIL,
}
function List:init(info)
self.page_top = 1
self.page_size = 1
if info.choices then
self:setChoices(info.choices, info.selected)
else
self.choices = {}
self.selected = 1
end
end
function List:setChoices(choices, selected)
self.choices = {}
for i,v in ipairs(choices or {}) do
local l = utils.clone(v);
if type(v) ~= 'table' then
l = { text = v }
else
l.text = v.text or v.caption or v[1]
end
parse_label_text(l)
self.choices[i] = l
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
if force_cb and self.on_select then
self.on_select(nil,nil)
end
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
local function paint_icon(icon, obj)
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
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
local active_pen = current and cur_pen or cur_dpen
if not self.active then
cur_pen = self.inactive_pen or self.cursor_pen
end
local y = (i - top)*self.row_height
local icon = getval(obj.icon)
if iw and icon then
dc:seek(0, y):pen(active_pen)
paint_icon(icon, obj)
end
render_text(obj, dc, iw or 0, y, cur_pen, cur_dpen, not current)
local ip = dc.width
if obj.key then
local keystr = gui.getKeyDisplay(obj.key)
ip = ip-2-#keystr
dc:seek(ip,y):pen(self.text_pen)
dc:string('('):string(keystr,COLOR_LIGHTGREEN):string(')')
end
if icon and not iw then
dc:seek(ip-1,y):pen(active_pen)
paint_icon(icon, obj)
end
end
end
function List:submit()
if self.on_submit and #self.choices > 0 then
self.on_submit(self:getSelected())
end
end
function List:submit2()
if self.on_submit2 and #self.choices > 0 then
self.on_submit2(self:getSelected())
end
end
function List:onInput(keys)
if self.on_submit and keys.SELECT then
self:submit()
return true
elseif self.on_submit2 and keys.SEC_SELECT then
self:submit2()
return true
elseif keys._MOUSE_L then
local _, mouse_y = self:getMousePos()
if mouse_y and #self.choices > 0 and
mouse_y < (#self.choices-self.page_top+1) * self.row_height then
local idx = self.page_top + math.floor(mouse_y/self.row_height)
self:setSelected(idx)
self:submit()
return true
end
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)
FilteredList.ATTRS {
edit_below = false,
edit_key = DEFAULT_NIL,
edit_ignore_keys = DEFAULT_NIL,
}
function FilteredList:init(info)
self.edit = EditField{
text_pen = info.edit_pen or info.cursor_pen,
frame = { l = info.icon_width, t = 0, h = 1 },
on_change = self:callback('onFilterChange'),
on_char = self:callback('onFilterChar'),
key = self.edit_key,
ignore_keys = self.edit_ignore_keys,
}
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 self.edit_below then
self.edit.frame = { l = info.icon_width, b = 0, h = 1 }
self.list.frame = { t = 0, b = 2 }
end
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
if info.on_submit2 then
self.list.on_submit2 = function()
return info.on_submit2(self:getSelected())
end
end
self.not_found = Label{
visible = true,
text = info.not_found_label or 'No matches',
text_pen = COLOR_LIGHTRED,
frame = { l = info.icon_width, t = self.list.frame.t },
}
self:addviews{ self.edit, self.list, self.not_found }
if info.choices then
self:setChoices(info.choices, info.selected)
else
self.choices = {}
end
end
function FilteredList:getChoices()
return self.choices
end
function FilteredList:getVisibleChoices()
return self.list.choices
end
function FilteredList:setChoices(choices, pos)
choices = choices or {}
self.edit:setText('')
self.list:setChoices(choices, pos)
self.choices = self.list.choices
self.not_found.visible = (#choices == 0)
end
function FilteredList:submit()
return self.list:submit()
end
function FilteredList:submit2()
return self.list:submit2()
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 ''
if filter ~= self.edit.text then
self.edit:setText(filter)
end
if filter ~= '' then
local tokens = filter:split()
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
key = key:escape_pattern()
-- start matches at non-space or non-punctuation. this allows
-- punctuation itself to be matched if that is useful (e.g.
-- filenames or parameter names)
if key ~= '' and
not search_key:match('%f[^%p\x00]'..key) and
not search_key:match('%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
function FilteredList:onFilterChar(char, text)
if char == ' ' then
return string.match(text, '%S$')
end
return true
end
return _ENV