276 lines
8.6 KiB
Lua
276 lines
8.6 KiB
Lua
-------------------------------------------------------------------------
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--- Tooltip module for awesome objects.
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--
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-- A tooltip is a small hint displayed when the mouse cursor
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-- hovers a specific item.
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-- In awesome, a tooltip can be linked with almost any
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-- object having a `:connect_signal()` method and receiving
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-- `mouse::enter` and `mouse::leave` signals.
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--
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-- How to create a tooltip?
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-- ---
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--
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-- myclock = awful.widget.textclock({}, "%T", 1)
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-- myclock_t = awful.tooltip({
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-- objects = { myclock },
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-- timer_function = function()
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-- return os.date("Today is %A %B %d %Y\nThe time is %T")
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-- end,
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-- })
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--
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-- How to add the same tooltip to several objects?
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-- ---
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--
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-- myclock_t:add_to_object(obj1)
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-- myclock_t:add_to_object(obj2)
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--
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-- Now the same tooltip is attached to `myclock`, `obj1`, `obj2`.
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--
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-- How to remove tooltip from many objects?
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-- ---
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--
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-- myclock_t:remove_from_object(obj1)
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-- myclock_t:remove_from_object(obj2)
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--
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-- Now the same tooltip is only attached to `myclock`.
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--
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-- @author Sébastien Gross <seb•ɱɩɲʋʃ•awesome•ɑƬ•chezwam•ɖɵʈ•org>
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-- @copyright 2009 Sébastien Gross
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-- @release @AWESOME_VERSION@
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-- @module awful.tooltip
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-------------------------------------------------------------------------
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local mouse = mouse
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local screen = screen
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local timer = require("gears.timer")
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local wibox = require("wibox")
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local a_placement = require("awful.placement")
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local beautiful = require("beautiful")
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local textbox = require("wibox.widget.textbox")
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local background = require("wibox.widget.background")
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local dpi = require("beautiful").xresources.apply_dpi
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local setmetatable = setmetatable
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local ipairs = ipairs
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--- Tooltip object definition.
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-- @table tooltip
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-- @tfield wibox wibox The wibox displaying the tooltip.
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-- @tfield boolean visible True if tooltip is visible.
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local tooltip = { mt = {} }
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--- Tooltip private data.
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-- @local
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-- @table tooltip.data
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-- @tfield string fg tooltip foreground color.
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-- @tfield string font Tooltip font.
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-- @tfield function hide The hide() function.
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-- @tfield function show The show() function.
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-- @tfield gears.timer timer The text update timer.
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-- @tfield function timer_function The text update timer function.
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local data = setmetatable({}, { __mode = 'k' })
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-- Place the tooltip on the screen.
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-- @tparam tooltip self A tooltip object.
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local function place(self)
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a_placement.under_mouse(self.wibox)
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a_placement.no_offscreen(self.wibox)
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end
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-- Place the tooltip under the mouse.
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--
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-- @tparam tooltip self A tooltip object.
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local function set_geometry(self)
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local my_geo = self.wibox:geometry()
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-- calculate width / height
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local n_w, n_h = self.textbox:fit(-1, -1)
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n_w = n_w + self.marginbox.left + self.marginbox.right
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n_h = n_h + self.marginbox.top + self.marginbox.bottom
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if my_geo.width ~= n_w or my_geo.height ~= n_h then
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self.wibox:geometry({ width = n_w, height = n_h })
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end
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end
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-- Show a tooltip.
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--
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-- @tparam tooltip self The tooltip to show.
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local function show(self)
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-- do nothing if the tooltip is already shown
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if self.visible then return end
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if data[self].timer then
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if not data[self].timer.started then
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data[self].timer_function()
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data[self].timer:start()
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end
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end
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set_geometry(self)
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place(self)
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self.wibox.visible = true
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self.visible = true
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end
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-- Hide a tooltip.
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--
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-- @tparam tooltip self The tooltip to hide.
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local function hide(self)
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-- do nothing if the tooltip is already hidden
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if not self.visible then return end
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if data[self].timer then
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if data[self].timer.started then
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data[self].timer:stop()
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end
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end
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self.visible = false
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self.wibox.visible = false
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end
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--- Change displayed text.
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--
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-- @tparam tooltip self The tooltip object.
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-- @tparam string text New tooltip text, passed to
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-- `wibox.widget.textbox.set_text`.
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tooltip.set_text = function(self, text)
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self.textbox:set_text(text)
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set_geometry(self)
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end
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--- Change displayed text.
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--
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-- @tparam tooltip self The tooltip object.
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-- @tparam string text New tooltip markup, passed to
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-- `wibox.widget.textbox.set_markup`.
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tooltip.set_markup = function(self, text)
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self.textbox:set_markup(text)
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set_geometry(self)
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end
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--- Change the tooltip's update interval.
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--
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-- @tparam tooltip self A tooltip object.
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-- @tparam number timeout The timeout value.
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tooltip.set_timeout = function(self, timeout)
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if data[self].timer then
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data[self].timer.timeout = timeout
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end
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end
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--- Add tooltip to an object.
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--
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-- @tparam tooltip self The tooltip.
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-- @tparam gears.object object An object with `mouse::enter` and
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-- `mouse::leave` signals.
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tooltip.add_to_object = function(self, object)
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object:connect_signal("mouse::enter", data[self].show)
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object:connect_signal("mouse::leave", data[self].hide)
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end
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--- Remove tooltip from an object.
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--
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-- @tparam tooltip self The tooltip.
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-- @tparam gears.object object An object with `mouse::enter` and
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-- `mouse::leave` signals.
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tooltip.remove_from_object = function(self, object)
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object:disconnect_signal("mouse::enter", data[self].show)
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object:disconnect_signal("mouse::leave", data[self].hide)
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end
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--- Create a new tooltip and link it to a widget.
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-- @tparam table args Arguments for tooltip creation.
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-- @tparam[opt=1] number args.timeout The timeout value for
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-- `timer_function`.
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-- @tparam function args.timer_function A function to dynamically set the
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-- tooltip text. Its return value will be passed to
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-- `wibox.widget.textbox.set_markup`.
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-- @tparam[opt] table args.objects A list of objects linked to the tooltip.
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-- @tparam[opt] number args.delay_show Delay showing the tooltip by this many
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-- seconds.
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-- @tparam[opt=apply_dpi(5)] integer args.margin_leftright The left/right margin for the text.
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-- @tparam[opt=apply_dpi(3)] integer args.margin_topbottom The top/bottom margin for the text.
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-- @treturn awful.tooltip The created tooltip.
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-- @see add_to_object
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-- @see set_timeout
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-- @see set_text
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-- @see set_markup
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tooltip.new = function(args)
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local self = {
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wibox = wibox({ }),
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visible = false,
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}
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-- private data
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local delay_timeout
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if args.delay_show then
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delay_timeout = timer { timeout = args.delay_show }
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delay_timeout:connect_signal("timeout", function () show(self) end)
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end
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data[self] = {
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show = function()
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if delay_timeout then delay_timeout:start()
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else show(self) end
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end,
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hide = function()
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if delay_timeout then delay_timeout:stop() end
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hide(self)
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end,
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}
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-- export functions
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self.set_text = tooltip.set_text
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self.set_markup = tooltip.set_markup
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self.set_timeout = tooltip.set_timeout
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self.add_to_object = tooltip.add_to_object
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self.remove_from_object = tooltip.remove_from_object
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-- setup the timer action only if needed
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if args.timer_function then
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data[self].timer = timer { timeout = args.timeout and args.timeout or 1 }
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data[self].timer_function = function()
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self:set_markup(args.timer_function())
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end
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data[self].timer:connect_signal("timeout", data[self].timer_function)
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end
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-- Set default properties
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self.wibox.border_width = beautiful.tooltip_border_width or beautiful.border_width or 1
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self.wibox.border_color = beautiful.tooltip_border_color or beautiful.border_normal or "#ffcb60"
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self.wibox.opacity = beautiful.tooltip_opacity or 1
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self.wibox:set_bg(beautiful.tooltip_bg_color or beautiful.bg_focus or "#ffcb60")
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local fg = beautiful.tooltip_fg_color or beautiful.fg_focus or "#000000"
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local font = beautiful.tooltip_font or beautiful.font or "terminus 6"
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-- set tooltip properties
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self.wibox.visible = false
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-- Who wants a non ontop tooltip ?
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self.wibox.ontop = true
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self.textbox = textbox()
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self.textbox:set_font(font)
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self.background = background(self.textbox)
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self.background:set_fg(fg)
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-- Add margin.
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local m_lr = args.margin_leftright or dpi(5)
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local m_tb = args.margin_topbottom or dpi(3)
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self.marginbox = wibox.layout.margin(self.background, m_lr, m_lr, m_tb, m_tb)
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self.wibox:set_widget(self.marginbox)
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-- add some signals on both the tooltip and widget
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self.wibox:connect_signal("mouse::enter", data[self].hide)
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-- Add tooltip to objects
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if args.objects then
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for _, object in ipairs(args.objects) do
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self:add_to_object(object)
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end
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end
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return self
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end
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function tooltip.mt:__call(...)
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return tooltip.new(...)
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end
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return setmetatable(tooltip, tooltip.mt)
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-- vim: ft=lua:et:sw=4:ts=4:sts=4:tw=78
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