mirror of
https://github.com/koreader/koreader
synced 2024-11-13 19:11:25 +00:00
f0122cf457
All our widgets are considering their provided 'width' as the outer width, except Button which considered it as some 'inner width', to which padding/border/margin were added. Let's have them all consistent. Some other widgets using Button had tweaks to account for that odd behaviour: fix and simplify them. Also fix Button layout when text is left aligned.
348 lines
13 KiB
Lua
348 lines
13 KiB
Lua
--[[--
|
|
A customizable number picker.
|
|
|
|
Example:
|
|
local NumberPickerWidget = require("ui/widget/numberpickerwidget")
|
|
local numberpicker = NumberPickerWidget:new{
|
|
-- for floating point (decimals), use something like "%.2f"
|
|
precision = "%02d",
|
|
value = 0,
|
|
value_min = 0,
|
|
value_max = 23,
|
|
value_step = 1,
|
|
value_hold_step = 4,
|
|
wrap = true,
|
|
}
|
|
--]]
|
|
|
|
local Button = require("ui/widget/button")
|
|
local CenterContainer = require("ui/widget/container/centercontainer")
|
|
local Device = require("device")
|
|
local FocusManager = require("ui/widget/focusmanager")
|
|
local FrameContainer = require("ui/widget/container/framecontainer")
|
|
local Geom = require("ui/geometry")
|
|
local Font = require("ui/font")
|
|
local InfoMessage = require("ui/widget/infomessage")
|
|
local InputDialog = require("ui/widget/inputdialog")
|
|
local Size = require("ui/size")
|
|
local UIManager = require("ui/uimanager")
|
|
local VerticalGroup = require("ui/widget/verticalgroup")
|
|
local VerticalSpan = require("ui/widget/verticalspan")
|
|
local _ = require("gettext")
|
|
local T = require("ffi/util").template
|
|
local Screen = Device.screen
|
|
|
|
local NumberPickerWidget = FocusManager:extend{
|
|
spinner_face = Font:getFace("smalltfont"),
|
|
precision = "%02d",
|
|
width = nil,
|
|
height = nil,
|
|
value = 0,
|
|
value_min = 0,
|
|
value_max = 23,
|
|
value_step = 1,
|
|
value_hold_step = 4,
|
|
value_table = nil,
|
|
value_index = nil,
|
|
wrap = true,
|
|
-- in case we need calculate number of days in a given month and year
|
|
date_month = nil,
|
|
date_year = nil,
|
|
-- on update signal to the caller and pass updated value
|
|
picker_updated_callback = nil,
|
|
unit = "",
|
|
}
|
|
|
|
function NumberPickerWidget:init()
|
|
self.screen_width = Screen:getWidth()
|
|
self.screen_height = Screen:getHeight()
|
|
self.width = self.width or math.floor(math.min(self.screen_width, self.screen_height) * 0.2)
|
|
if self.value_table then
|
|
self.value_index = self.value_index or 1
|
|
self.value = self.value_table[self.value_index]
|
|
end
|
|
self.layout = {}
|
|
|
|
-- Widget layout
|
|
local bordersize = Size.border.default
|
|
local margin = Size.margin.default
|
|
local button_up = Button:new{
|
|
text = "▲",
|
|
bordersize = bordersize,
|
|
margin = margin,
|
|
radius = 0,
|
|
text_font_size = 24,
|
|
width = self.width,
|
|
show_parent = self.show_parent,
|
|
callback = function()
|
|
if self.date_month and self.date_year then
|
|
self.value_max = self:getDaysInMonth(self.date_month:getValue(), self.date_year:getValue())
|
|
end
|
|
self.value = self:changeValue(self.value, self.value_step, self.value_max, self.value_min, self.wrap)
|
|
self:update()
|
|
end,
|
|
hold_callback = function()
|
|
if self.date_month and self.date_year then
|
|
self.value_max = self:getDaysInMonth(self.date_month:getValue(), self.date_year:getValue())
|
|
end
|
|
self.value = self:changeValue(self.value, self.value_hold_step, self.value_max, self.value_min, self.wrap)
|
|
self:update()
|
|
end
|
|
}
|
|
table.insert(self.layout, {button_up})
|
|
local button_down = Button:new{
|
|
text = "▼",
|
|
bordersize = bordersize,
|
|
margin = margin,
|
|
radius = 0,
|
|
text_font_size = 24,
|
|
width = self.width,
|
|
show_parent = self.show_parent,
|
|
callback = function()
|
|
if self.date_month and self.date_year then
|
|
self.value_max = self:getDaysInMonth(self.date_month:getValue(), self.date_year:getValue())
|
|
end
|
|
self.value = self:changeValue(self.value, self.value_step * -1, self.value_max, self.value_min, self.wrap)
|
|
self:update()
|
|
end,
|
|
hold_callback = function()
|
|
if self.date_month and self.date_year then
|
|
self.value_max = self:getDaysInMonth(self.date_month:getValue(), self.date_year:getValue())
|
|
end
|
|
self.value = self:changeValue(self.value, self.value_hold_step * -1, self.value_max, self.value_min, self.wrap)
|
|
self:update()
|
|
end
|
|
}
|
|
table.insert(self.layout, {button_down})
|
|
|
|
local empty_space = VerticalSpan:new{ width = Size.padding.large }
|
|
|
|
self.formatted_value = self.value
|
|
if not self.value_table then
|
|
self.formatted_value = string.format(self.precision, self.formatted_value)
|
|
end
|
|
|
|
local input_dialog
|
|
local callback_input = nil
|
|
if self.value_table == nil then
|
|
callback_input = function()
|
|
if self.date_month and self.date_year then
|
|
self.value_max = self:getDaysInMonth(self.date_month:getValue(), self.date_year:getValue())
|
|
end
|
|
input_dialog = InputDialog:new{
|
|
title = _("Enter number"),
|
|
input_hint = T("%1 (%2 - %3)", self.formatted_value, self.value_min, self.value_max),
|
|
input_type = "number",
|
|
buttons = {
|
|
{
|
|
{
|
|
text = _("Cancel"),
|
|
id = "close",
|
|
callback = function()
|
|
UIManager:close(input_dialog)
|
|
end,
|
|
},
|
|
{
|
|
text = _("OK"),
|
|
is_enter_default = true,
|
|
callback = function()
|
|
local input_text = input_dialog:getInputText()
|
|
local input_value = tonumber(input_text)
|
|
local turn_off_checks = false
|
|
|
|
-- if the first character of the input string is ":" turn off min-max checks
|
|
if input_text:match("^:") and G_reader_settings:isTrue("debug_verbose") then
|
|
turn_off_checks = true -- turn off checks
|
|
input_text = input_text:gsub("^:", "") -- shorten input
|
|
input_value = tonumber(input_text) -- try to get value
|
|
end
|
|
|
|
-- if the input text starts with `=`, try to evaluate the expression
|
|
-- only allow `math.*` and no other functions to be safe here.
|
|
if input_text:match("^=") then
|
|
local function evaluate_string(code)
|
|
-- only execute if there are no chars (except math.xxx) and no {[]} in the user input
|
|
local check_code = code:gsub("math%.%a*", "")
|
|
if check_code:find("[%a%[%]%{%}]") then
|
|
return nil
|
|
end
|
|
code = code:gsub("^=", "return ")
|
|
local env = {math = math} -- restrict to only math functions
|
|
local func, dummy = load(code, "user_sandbox", nil, env)
|
|
if func then
|
|
return pcall(func)
|
|
end
|
|
end
|
|
local dummy
|
|
dummy, input_value = evaluate_string(input_text)
|
|
input_value = dummy and tonumber(input_value)
|
|
end
|
|
|
|
if turn_off_checks then
|
|
if not input_value then return end
|
|
if input_value < self.value_min or input_value > self.value_max then
|
|
UIManager:show(InfoMessage:new{
|
|
text = T(_("ATTENTION:\nPrefixing the input with ':' disables sanity checks!\nThis value should be in the range of %1 - %2.\nUndefined behavior may occur."), self.value_min, self.value_max),
|
|
})
|
|
end
|
|
self.value = input_value
|
|
self:update()
|
|
UIManager:close(input_dialog)
|
|
return
|
|
end
|
|
|
|
if input_value and input_value >= self.value_min and input_value <= self.value_max then
|
|
self.value = input_value
|
|
self:update()
|
|
UIManager:close(input_dialog)
|
|
elseif input_value and input_value < self.value_min then
|
|
UIManager:show(InfoMessage:new{
|
|
text = T(_("This value should be %1 or more."), self.value_min),
|
|
timeout = 2,
|
|
})
|
|
elseif input_value and input_value > self.value_max then
|
|
UIManager:show(InfoMessage:new{
|
|
text = T(_("This value should be %1 or less."), self.value_max),
|
|
timeout = 2,
|
|
})
|
|
else
|
|
UIManager:show(InfoMessage:new{
|
|
text = _("Invalid value. Please enter a valid value."),
|
|
timeout = 2
|
|
})
|
|
end
|
|
end,
|
|
},
|
|
},
|
|
},
|
|
}
|
|
UIManager:show(input_dialog)
|
|
input_dialog:onShowKeyboard()
|
|
end
|
|
end
|
|
|
|
local unit = ""
|
|
if self.unit then
|
|
if self.unit == "°" then
|
|
unit = self.unit
|
|
elseif self.unit ~= "" then
|
|
unit = "\xE2\x80\xAF" .. self.unit -- use Narrow No-Break Space (NNBSP) here
|
|
end
|
|
end
|
|
self.text_value = Button:new{
|
|
text = tostring(self.formatted_value) .. unit,
|
|
bordersize = 0,
|
|
padding = 0,
|
|
text_font_face = self.spinner_face.font,
|
|
text_font_size = self.spinner_face.orig_size,
|
|
width = self.width,
|
|
show_parent = self.show_parent,
|
|
callback = callback_input,
|
|
}
|
|
if callback_input then
|
|
table.insert(self.layout, 2, {self.text_value})
|
|
end
|
|
|
|
local widget_spinner = VerticalGroup:new{
|
|
align = "center",
|
|
button_up,
|
|
empty_space,
|
|
self.text_value,
|
|
empty_space,
|
|
button_down,
|
|
}
|
|
|
|
self.frame = FrameContainer:new{
|
|
bordersize = 0,
|
|
padding = Size.padding.default,
|
|
CenterContainer:new{
|
|
align = "center",
|
|
dimen = Geom:new{
|
|
w = widget_spinner:getSize().w,
|
|
h = widget_spinner:getSize().h
|
|
},
|
|
widget_spinner
|
|
}
|
|
}
|
|
self.dimen = self.frame:getSize()
|
|
self[1] = self.frame
|
|
self:refocusWidget()
|
|
UIManager:setDirty(self.show_parent, function()
|
|
return "ui", self.dimen
|
|
end)
|
|
end
|
|
|
|
--[[--
|
|
Update.
|
|
--]]
|
|
function NumberPickerWidget:update()
|
|
self.formatted_value = self.value
|
|
if not self.value_table then
|
|
self.formatted_value = string.format(self.precision, self.formatted_value)
|
|
end
|
|
|
|
self.text_value:setText(tostring(self.formatted_value), self.width)
|
|
|
|
self:refocusWidget()
|
|
UIManager:setDirty(self.show_parent, function()
|
|
return "ui", self.dimen
|
|
end)
|
|
if self.picker_updated_callback then
|
|
self.picker_updated_callback(self.value, self.value_index)
|
|
end
|
|
end
|
|
|
|
--[[--
|
|
Change value.
|
|
--]]
|
|
function NumberPickerWidget:changeValue(value, step, max, min, wrap)
|
|
if self.value_index then
|
|
self.value_index = self.value_index + step
|
|
if self.value_index > #self.value_table then
|
|
self.value_index = wrap and 1 or #self.value_table
|
|
elseif
|
|
self.value_index < 1 then
|
|
self.value_index = wrap and #self.value_table or 1
|
|
end
|
|
value = self.value_table[self.value_index]
|
|
else
|
|
value = value + step
|
|
if value > max then
|
|
value = wrap and min or max
|
|
elseif value < min then
|
|
value = wrap and max or min
|
|
end
|
|
end
|
|
return value
|
|
end
|
|
|
|
--[[--
|
|
Get days in month.
|
|
--]]
|
|
function NumberPickerWidget:getDaysInMonth(month, year)
|
|
local days_in_month = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }
|
|
local days = days_in_month[month]
|
|
-- check for leap year
|
|
if (month == 2) then
|
|
if year % 4 == 0 then
|
|
if year % 100 == 0 then
|
|
if year % 400 == 0 then
|
|
days = 29
|
|
end
|
|
else
|
|
days = 29
|
|
end
|
|
end
|
|
end
|
|
return days
|
|
end
|
|
|
|
--[[--
|
|
Get value.
|
|
--]]
|
|
function NumberPickerWidget:getValue()
|
|
return self.value, self.value_index
|
|
end
|
|
|
|
return NumberPickerWidget
|