awesome/lib/awful/tooltip.lua

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-------------------------------------------------------------------------
--- Tooltip module for awesome objects.
--
-- A tooltip is a small hint displayed when the mouse cursor
-- hovers over a specific item.
-- In awesome, a tooltip can be linked with almost any
-- object having a `:connect_signal()` method and receiving
-- `mouse::enter` and `mouse::leave` signals.
--
-- How to create a tooltip?
-- ---
--
-- @DOC_awful_tooltip_textclock_EXAMPLE@
--
-- Alternatively, you can use `mouse::enter` signal:
--
-- @DOC_awful_tooltip_textclock2_EXAMPLE@
--
-- How to create a tooltip without objects?
-- ---
--
-- @DOC_awful_tooltip_mouse_EXAMPLE@
--
-- How to add the same tooltip to multiple objects?
-- ---
--
-- myclock_t:add_to_object(obj1)
-- myclock_t:add_to_object(obj2)
--
-- Now the same tooltip is attached to `myclock`, `obj1`, `obj2`.
--
-- How to remove a tooltip from several objects?
-- ---
--
-- myclock_t:remove_from_object(obj1)
-- myclock_t:remove_from_object(obj2)
--
-- Now the same tooltip is only attached to `myclock`.
--
-- @author Sébastien Gross <seb•ɱɩɲʋʃ•awesome•ɑƬ•chezwam•ɖɵʈ•org>
-- @copyright 2009 Sébastien Gross
-- @popupmod awful.tooltip
-- @supermodule wibox
-------------------------------------------------------------------------
local timer = require("gears.timer")
local gtable = require("gears.table")
local object = require("gears.object")
local color = require("gears.color")
local wibox = require("wibox")
local a_placement = require("awful.placement")
local a_button = require("awful.button")
local shape = require("gears.shape")
local beautiful = require("beautiful")
local dpi = require("beautiful").xresources.apply_dpi
local setmetatable = setmetatable
local ipairs = ipairs
local capi = {mouse=mouse, awesome=awesome}
local tooltip = { mt = {} }
-- The mouse point is 1x1, so anything aligned based on it as parent
-- geometry will go out of bound. To get the desired placement, it is
-- necessary to swap left with right and top with bottom
local align_convert = {
top_left = "bottom_right",
left = "right",
bottom_left = "top_right",
right = "left",
top_right = "bottom_left",
bottom_right = "top_left",
top = "bottom",
bottom = "top",
}
-- If the wibox is under the cursor, it will trigger a mouse::leave
local offset = {
top_left = {x = 0, y = 0 },
left = {x = 0, y = 0 },
bottom_left = {x = 0, y = 0 },
right = {x = 1, y = 0 },
top_right = {x = 0, y = 0 },
bottom_right = {x = 1, y = 1 },
top = {x = 0, y = 0 },
bottom = {x = 0, y = 1 },
}
--- The tooltip border color.
-- @beautiful beautiful.tooltip_border_color
-- @param color
--- The tooltip background color.
-- @beautiful beautiful.tooltip_bg
-- @param color
--- The tooltip foregound (text) color.
-- @beautiful beautiful.tooltip_fg
-- @param color
--- The tooltip font.
-- @beautiful beautiful.tooltip_font
-- @param string
--- The tooltip border width.
-- @beautiful beautiful.tooltip_border_width
-- @param number
--- The tooltip opacity.
-- @beautiful beautiful.tooltip_opacity
-- @tparam number opacity Between 0 and 1
--- The tooltip margins.
-- @beautiful beautiful.tooltip_gaps
-- @param table
--- The default tooltip shape.
-- The default shape for all tooltips is a rectangle. However, by setting
-- this variable they can default to rounded rectangle or stretched octagons.
-- @beautiful beautiful.tooltip_shape
-- @tparam[opt=gears.shape.rectangle] gears.shape shape A `gears.shape`
-- compatible function
-- @see shape
-- @see gears.shape
local function apply_mouse_mode(self)
local w = self:get_wibox()
local align = self._private.align
local real_placement = align_convert[align]
a_placement[real_placement](w, {
parent = capi.mouse,
offset = offset[align]
})
end
local function apply_outside_mode(self)
local w = self:get_wibox()
local _, position = a_placement.next_to(w, {
geometry = self._private.widget_geometry,
preferred_positions = self.preferred_positions,
preferred_anchors = self.preferred_alignments,
honor_workarea = true,
margins = self._private.gaps
})
self.current_position = position
end
-- Place the tooltip under the mouse.
--
-- @tparam tooltip self A tooltip object.
local function set_geometry(self)
-- calculate width / height
local n_w, n_h = self.textbox:get_preferred_size(capi.mouse.screen)
n_w = n_w + self.marginbox.left + self.marginbox.right
n_h = n_h + self.marginbox.top + self.marginbox.bottom
local w = self:get_wibox()
w:geometry({ width = n_w, height = n_h })
local mode = self.mode
if mode == "outside" and self._private.widget_geometry then
apply_outside_mode(self)
else
apply_mouse_mode(self)
end
a_placement.no_offscreen(w)
end
-- Show a tooltip.
--
-- @tparam tooltip self The tooltip to show.
local function show(self)
-- do nothing if the tooltip is already shown
if self._private.visible then return end
if self.timer then
if not self.timer.started then
self.timer:start()
self:timer_function()
end
end
set_geometry(self)
self.wibox.visible = true
self._private.visible = true
self:emit_signal("property::visible")
end
-- Hide a tooltip.
--
-- @tparam tooltip self The tooltip to hide.
local function hide(self)
-- do nothing if the tooltip is already hidden
if not self._private.visible then return end
if self.timer then
if self.timer.started then
self.timer:stop()
end
end
self.wibox.visible = false
self._private.visible = false
self:emit_signal("property::visible")
end
--- The wibox containing the tooltip widgets.
-- @property wibox
-- @tparam wibox wibox
function tooltip:get_wibox()
if self._private.wibox then
return self._private.wibox
end
local wb = wibox(self.wibox_properties)
wb:set_widget(self.widget)
-- Close the tooltip when clicking it. This gets done on release, to not
-- emit the release event on an underlying object, e.g. the titlebar icon.
wb.buttons = {
a_button({}, 1, nil, self.hide)
}
self._private.wibox = wb
return wb
end
--- Is the tooltip visible?
-- @property visible
-- @tparam[opt=true] boolean visible
-- @propemits true false
function tooltip:get_visible()
return self._private.visible
end
function tooltip:set_visible(value)
if self._private.visible == value then return end
if value then
show(self)
else
hide(self)
end
self:emit_signal("property::visible", value)
end
--- The horizontal alignment.
--
-- This is valid for the mouse mode only. For the outside mode, use
-- `preferred_positions`.
--
-- @DOC_awful_tooltip_align_EXAMPLE@
--
-- @DOC_awful_tooltip_align2_EXAMPLE@
--
-- The following values are valid:
--
-- * top_left
-- * left
-- * bottom_left
-- * right
-- * top_right
-- * bottom_right
-- * bottom
-- * top
--
-- @property align
-- @tparam string align
-- @see mode
-- @see preferred_positions
-- @propemits true false
-- @propbeautiful
--- The default tooltip alignment.
-- @beautiful beautiful.tooltip_align
-- @tparam string tooltip_align
-- @see align
function tooltip:get_align()
return self._private.align
end
function tooltip:set_align(value)
if not align_convert[value] then
return
end
self._private.align = value
set_geometry(self)
self:emit_signal("property::align", value)
end
--- The shape of the tooltip window.
--
-- @DOC_awful_tooltip_shape_EXAMPLE@
--
-- @property shape
-- @tparam gears.shape shape
-- @see gears.shape
-- @propemits true false
-- @propbeautiful
function tooltip:set_shape(s)
self.backgroundbox:set_shape(s)
self:emit_signal("property::shape", s)
end
--- Set the tooltip positioning mode.
-- This affects how the tooltip is placed. By default, the tooltip is `align`ed
-- close to the mouse cursor. It is also possible to place the tooltip relative
-- to the widget geometry.
--
-- **mouse:**
--
-- @DOC_awful_tooltip_mode_EXAMPLE@
--
-- **outside:**
--
-- @DOC_awful_tooltip_mode2_EXAMPLE@
--
-- Valid modes are:
--
-- * "mouse": Next to the mouse cursor
-- * "outside": Outside of the widget
--
-- @property mode
-- @tparam string mode
-- @propemits true false
function tooltip:set_mode(mode)
self._private.mode = mode
set_geometry(self)
self:emit_signal("property::mode", mode)
end
function tooltip:get_mode()
return self._private.mode or "mouse"
end
--- The preferred positions when in `outside` mode.
--
-- @DOC_awful_tooltip_preferred_positions_EXAMPLE@
--
-- If the tooltip fits on multiple sides of the drawable, then this defines the
-- priority.
--
-- The valid table values are:
--
-- * "top"
-- * "right"
-- * "left"
-- * "bottom"
--
-- The default is:
--
-- {"top", "right", "left", "bottom"}
--
-- @property preferred_positions
-- @tparam table preferred_positions The position, ordered by priorities
-- @propemits true false
-- @see align
-- @see mode
-- @see preferred_alignments
function tooltip:get_preferred_positions()
return self._private.preferred_positions or
{"top", "right", "left", "bottom"}
end
function tooltip:set_preferred_positions(value)
self._private.preferred_positions = value
set_geometry(self)
self:emit_signal("property::preferred_positions", value)
end
--- The preferred alignment when using the `outside` mode.
--
-- The values of the table are ordered by priority, the first one that fits
-- will be used.
--
-- **front:**
--
-- @DOC_awful_tooltip_preferred_alignment_EXAMPLE@
--
-- **middle:**
--
-- @DOC_awful_tooltip_preferred_alignment2_EXAMPLE@
--
-- **back:**
--
-- @DOC_awful_tooltip_preferred_alignment3_EXAMPLE@
--
-- The valid table values are:
--
-- * front
-- * middle
-- * back
--
-- The default is:
--
-- {"front", "back", "middle"}
--
-- @property preferred_alignments
-- @tparam string preferred_alignments
-- @propemits true false
-- @see preferred_positions
function tooltip:get_preferred_alignments()
return self._private.preferred_alignments or
{"front", "back", "middle"}
end
function tooltip:set_preferred_alignments(value)
self._private.preferred_alignments = value
set_geometry(self)
self:emit_signal("property::preferred_alignments", value)
end
--- Change displayed text.
--
-- @property text
-- @tparam string text New tooltip text, passed to
-- `wibox.widget.textbox.set_text`.
-- @propemits true false
-- @see wibox.widget.textbox
function tooltip:set_text(text)
self.textbox:set_text(text)
if self._private.visible then
set_geometry(self)
end
self:emit_signal("property::text", text)
end
--- Change displayed markup.
--
-- @property markup
-- @tparam string markup New tooltip markup, passed to
-- `wibox.widget.textbox.set_markup`.
-- @propemits true false
-- @see wibox.widget.textbox
function tooltip:set_markup(text)
self.textbox:set_markup(text)
if self._private.visible then
set_geometry(self)
end
self:emit_signal("property::markup", text)
end
--- Change the tooltip's update interval.
--
-- @property timeout
-- @tparam number timeout The timeout value.
-- @propemits true false
function tooltip:set_timeout(timeout)
if self.timer then
self.timer.timeout = timeout
end
self:emit_signal("property::timeout", timeout)
end
--- Set all margins around the tooltip textbox.
--
-- @DOC_awful_tooltip_margins_EXAMPLE@
--
-- @property margins
-- @tparam number|table margins New margins value.
-- @propemits true false
function tooltip:set_margins(val)
self.marginbox:set_margins(val)
self:emit_signal("property::margins", val)
end
--- The border width.
--
-- @DOC_awful_tooltip_border_width_EXAMPLE@
--
-- @property border_width
-- @tparam[opt=0] number border_width
-- @propemits true false
-- @propbeautiful
function tooltip:set_border_width(val)
self.widget.border_width = val
self:emit_signal("property::border_width", val)
end
--- The border color.
--
-- @DOC_awful_tooltip_border_color_EXAMPLE@
--
-- @property border_color
-- @tparam[opt=beautiful.tooltip_border_color or beautiful.border_color_normal or beautiful.fg_normal]
-- gears.color border_color
-- @propemits true false
-- @propbeautiful
function tooltip:set_border_color(val)
self.widget.border_color = val
self:emit_signal("property::border_color", val)
end
--- Set the margins around the left and right of the tooltip textbox.
--
-- @DOC_awful_tooltip_margins_leftright_EXAMPLE@
--
-- @property margins_leftright
-- @tparam number margins_leftright New margins value.
-- @propemits true false
function tooltip:set_margin_leftright(val)
self.marginbox:set_left(val)
self.marginbox:set_right(val)
self:emit_signal("property::margin_leftright", val)
end
--TODO v5 deprecate this
function tooltip:set_margins_leftright(val)
self:set_margin_leftright(val)
end
--- Set the margins around the top and bottom of the tooltip textbox.
--
-- @DOC_awful_tooltip_margins_topbottom_EXAMPLE@
--
-- @property margins_topbottom
-- @tparam number margins_topbottom New margins value.
-- @propemits true false
function tooltip:set_margin_topbottom(val)
self.marginbox:set_top(val)
self.marginbox:set_bottom(val)
self:emit_signal("property::margin_topbottom", val)
end
--TODO v5 deprecate this
function tooltip:set_margins_topbottom(val)
self:set_margin_topbottom(val)
end
--- Set the margins between the tooltip and its parent.
--
-- @DOC_awful_tooltip_gaps_EXAMPLE@
--
-- @property gaps
-- @tparam number|table gaps New margins value.
-- @propemits true false
function tooltip:set_gaps(val)
self._private.gaps = val
end
function tooltip:get_gaps()
return self._private.gaps
end
--- Add tooltip to an object.
--
-- @tparam tooltip self The tooltip.
-- @tparam gears.object obj An object with `mouse::enter` and
-- `mouse::leave` signals.
-- @noreturn
-- @method add_to_object
function tooltip:add_to_object(obj)
if not obj then return end
obj:connect_signal("mouse::enter", self.show)
obj:connect_signal("mouse::leave", self.hide)
end
--- Remove tooltip from an object.
--
-- @tparam tooltip self The tooltip.
-- @tparam gears.object obj An object with `mouse::enter` and
-- `mouse::leave` signals.
-- @noreturn
-- @method remove_from_object
function tooltip:remove_from_object(obj)
obj:disconnect_signal("mouse::enter", self.show)
obj:disconnect_signal("mouse::leave", self.hide)
end
-- Tooltip can be applied to both widgets, wibox and client, their geometry
-- works differently.
local function get_parent_geometry(arg1, arg2)
if type(arg2) == "table" and arg2.width then
return arg2
elseif type(arg1) == "table" and arg1.width then
return arg1
end
end
--- Create a new tooltip and link it to a widget.
-- Tooltips emit `property::visible` when their visibility changes.
-- @tparam table args Arguments for tooltip creation.
-- @tparam function args.timer_function A function to dynamically set the
-- tooltip text. Its return value will be passed to
-- `wibox.widget.textbox.set_markup`.
-- @tparam[opt=1] number args.timeout The timeout value for
-- `timer_function`.
-- @tparam[opt] table args.objects A list of objects linked to the tooltip.
-- @tparam[opt] number args.delay_show Delay showing the tooltip by this many
-- seconds.
-- @tparam[opt=apply_dpi(5)] integer args.margin_leftright The left/right margin for the text.
-- @tparam[opt=apply_dpi(3)] integer args.margin_topbottom The top/bottom margin for the text.
-- @tparam[opt=nil] gears.shape args.shape The shape.
-- @tparam[opt=beautiful.tooltip_bg] string args.bg The background color.
-- @tparam[opt=beautiful.tooltip_fg] string args.fg The foreground color.
-- @tparam[opt=beautiful.tooltip_border_color] string args.border_color The tooltip border color.
-- @tparam[opt=beautiful.tooltip_border_width] number args.border_width The tooltip border width.
-- @tparam[opt] string args.align The horizontal alignment.
-- @tparam[opt=beautiful.tooltip_font] string args.font The tooltip font.
-- @tparam[opt=beautiful.tooltip_opacity] number args.opacity The tooltip opacity.
-- @tparam[opt=beautiful.tooltip_gaps] table|number args.gaps The tooltip margins.
-- @treturn awful.tooltip The created tooltip.
-- @see add_to_object
-- @see timeout
-- @see text
-- @see markup
-- @see align
-- @constructorfct awful.tooltip
function tooltip.new(args)
args = args or {}
-- gears.object, properties are linked to set_/get_ functions
local self = object {
enable_properties = true,
}
rawset(self,"_private", {})
self._private.visible = false
self._private.align = args.align or beautiful.tooltip_align or "right"
self._private.shape = args.shape or beautiful.tooltip_shape
or shape.rectangle
self._private.gaps = args.gaps or beautiful.tooltip_gaps or {
left = args.gaps or 0, right = args.gaps or 0,
top = args.gaps or 0, bottom = args.gaps or 0
}
-- private data
if args.delay_show then
local delay_timeout
delay_timeout = timer { timeout = args.delay_show }
delay_timeout:connect_signal("timeout", function ()
show(self)
delay_timeout:stop()
end)
function self.show(other, geo)
-- Auto detect clients and wiboxes
if other.drawable or other.pid then
geo = other:geometry()
end
-- Cache the geometry in case it is needed later
self._private.widget_geometry = get_parent_geometry(other, geo)
if not delay_timeout.started then
delay_timeout:start()
end
end
function self.hide()
if delay_timeout.started then
delay_timeout:stop()
end
hide(self)
end
else
function self.show(other, geo)
-- Auto detect clients and wiboxes
if other.drawable or other.pid then
geo = other
end
-- Cache the geometry in case it is needed later
self._private.widget_geometry = get_parent_geometry(other, geo)
show(self)
end
function self.hide()
hide(self)
end
end
-- export functions
gtable.crush(self, tooltip, true)
-- setup the timer action only if needed
if args.timer_function then
self.timer = timer { timeout = args.timeout and args.timeout or 1 }
self.timer_function = function()
self:set_markup(args.timer_function())
end
self.timer:connect_signal("timeout", self.timer_function)
end
-- collect tooltip properties
-- wibox
local fg = args.fg or beautiful.tooltip_fg or beautiful.fg_focus or "#000000"
local opacity = args.opacity or beautiful.tooltip_opacity or 1
-- textbox
local font = args.font or beautiful.tooltip_font or beautiful.font
-- marginbox
local m_lr = args.margin_leftright or dpi(5)
local m_tb = args.margin_topbottom or dpi(3)
-- backgroundbox
local bg = args.bg or beautiful.tooltip_bg
or beautiful.bg_focus or "#ffcb60"
local border_width = args.border_width or beautiful.tooltip_border_width or 0
local border_color = args.border_color or beautiful.tooltip_border_color
or beautiful.border_color_normal or "#ffcb60"
-- Set wibox default properties
self.wibox_properties = {
visible = false,
ontop = true,
border_width = 0,
fg = fg,
bg = color.transparent,
opacity = opacity,
type = "tooltip",
}
self.widget = wibox.widget {
{
{
id = 'text_role',
font = font,
widget = wibox.widget.textbox,
},
id = 'margin_role',
left = m_lr,
right = m_lr,
top = m_tb,
bottom = m_tb,
widget = wibox.container.margin,
},
id = 'background_role',
bg = bg,
shape = self._private.shape,
border_width = border_width,
border_color = border_color,
widget = wibox.container.background,
}
self.textbox = self.widget:get_children_by_id('text_role')[1]
self.marginbox = self.widget:get_children_by_id('margin_role')[1]
self.backgroundbox = self.widget:get_children_by_id('background_role')[1]
-- Add tooltip to objects
if args.objects then
for _, obj in ipairs(args.objects) do
self:add_to_object(obj)
end
end
-- Apply the properties
for k, v in pairs(args) do
if tooltip["set_"..k] then
self[k] = v
end
end
return self
end
function tooltip.mt:__call(...)
return tooltip.new(...)
end
--@DOC_object_COMMON@
return setmetatable(tooltip, tooltip.mt)
-- vim: filetype=lua:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80