228 lines
7.0 KiB
Lua
228 lines
7.0 KiB
Lua
-------------------------------------------------------------------------
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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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-------------------------------------------------------------------------
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local mouse = mouse
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local screen = screen
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local timer = 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 setmetatable = setmetatable
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local ipairs = ipairs
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--- Tooltip module for awesome objects.
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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 <code>connect_signal()</code> method and receiving
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-- <code>mouse::enter</code> and <code>mouse::leave</code> signals.
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-- <p>How to create a tooltip?<br/>
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-- <code>
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-- myclock = awful.widget.textclock({}, "%T", 1)<br/>
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-- myclock_t = awful.tooltip({<br/>
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-- objects = { myclock },<br/>
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-- timer_function = function()<br/>
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-- return os.date("Today is %A %B %d %Y\nThe time is %T")<br/>
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-- end,<br/>
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-- })<br/>
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-- </code>
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-- </p>
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-- <p>How to add the same tooltip to several objects?<br/>
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-- <code>
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-- myclock_t:add_to_object(obj1)<br/>
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-- myclock_t:add_to_object(obj2)<br/>
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-- </code>
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-- Now the same tooltip is attached to <code>myclock</code>, <code>obj1</code>,
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-- <code>obj2</code>.<br/>
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-- </p>
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-- <p>How to remove tooltip from many objects?<br/>
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-- <code>
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-- myclock_t:remove_from_object(obj1)<br/>
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-- myclock_t:remove_from_object(obj2)<br/>
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-- </code>
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-- Now the same tooltip is only attached to <code>myclock</code>.<br/>
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-- </p>
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-- awful.tooltip
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local tooltip = { mt = {} }
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local data = setmetatable({}, { __mode = 'k' })
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--- Tooltip object definition.
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-- @name tooltip
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-- @field wibox The wibox displaying the tooltip.
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-- @field visible True if tooltip is visible.
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-- @class table
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-- Tooltip private data.
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-- @name awful.tooltip.data
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-- @field fg tooltip foreground color.
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-- @field font Tooltip font.
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-- @field hide The hide() function.
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-- @field show The show() function.
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-- @field timer The text update timer.
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-- @field timer_function The text update timer function.
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-- Place to tooltip on th screen.
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-- @param 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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-- @param 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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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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-- @param 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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-- @param 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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-- @param self The tooltip object.
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-- @param text New tooltip text.
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local function set_text(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 the tooltip's update interval.
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-- @param self A tooltip object.
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-- @param timeout The timeout value.
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local function set_timeout(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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-- @param self The tooltip.
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-- @param object An object.
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local function add_to_object(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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-- @param self The tooltip.
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-- @param object An object.
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local function remove_from_object(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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-- @param args Arguments for tooltip creation may containt:<br/>
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-- <code>timeout</code>: The timeout value for update_func.<br/>
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-- <code>timer_function</code>: A function to dynamically change the tooltip
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-- text.<br/>
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-- <code>objects</code>: A list of objects linked to the tooltip.<br/>
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-- @return 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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local function new(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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data[self] = {
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show = function() show(self) end,
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hide = function() hide(self) end
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}
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-- export functions
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self.set_text = set_text
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self.set_timeout = set_timeout
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self.add_to_object = add_to_object
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self.remove_from_object = 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_text(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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self.wibox:set_widget(self.background)
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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 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:enc=utf-8:tw=78
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