157 lines
4.7 KiB
Lua
157 lines
4.7 KiB
Lua
---------------------------------------------------------------------------
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-- @author Uli Schlachter
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-- @copyright 2010 Uli Schlachter
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-- @release @AWESOME_VERSION@
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---------------------------------------------------------------------------
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local base = require("wibox.layout.base")
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local widget_base = require("wibox.widget.base")
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local table = table
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local pairs = pairs
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module("wibox.layout.fixed")
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--- Draw a fixed layout. Each widget gets just the space it asks for.
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-- @param dir "x" for a horizontal layout and "y" for vertical.
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-- @param widgets The widgets to draw.
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-- @param fill_space Use all the available space, giving all that is left to the
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-- last widget
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-- @param cr The cairo context to use.
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-- @param width The available width.
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-- @param height The available height.
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-- @return The total space needed by the layout.
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function draw_fixed(dir, widgets, fill_space, wibox, cr, width, height)
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local pos = 0
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for k, v in pairs(widgets) do
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local x, y, w, h
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local in_dir
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if dir == "y" then
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x, y = 0, pos
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w, h = width, height - pos
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if k ~= #widgets or not fill_space then
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_, h = v:fit(w, h);
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end
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pos = pos + h
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in_dir = h
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else
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x, y = pos, 0
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w, h = width - pos, height
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if k ~= #widgets or not fill_space then
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w, _ = v:fit(w, h);
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end
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pos = pos + w
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in_dir = w
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end
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if (dir == "y" and pos > height) or
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(dir ~= "y" and pos > width) then
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break
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end
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base.draw_widget(wibox, cr, v, x, y, w, h)
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end
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end
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--- Add a widget to the given fixed layout
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function add(layout, widget)
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widget_base.check_widget(widget)
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table.insert(layout.widgets, widget)
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widget:connect_signal("widget::updated", layout._emit_updated)
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layout._emit_updated()
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end
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--- Fit the fixed layout into the given space
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-- @param dir "x" for a horizontal layout and "y" for vertical.
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-- @param widgets The widgets to fit.
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-- @param orig_width The available width.
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-- @param orig_height The available height.
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function fit_fixed(dir, widgets, orig_width, orig_height)
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local width, height = orig_width, orig_height
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local used_in_dir, used_max = 0, 0
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for k, v in pairs(widgets) do
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local w, h = v:fit(width, height)
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local in_dir, max
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if dir == "y" then
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max, in_dir = w, h
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height = height - in_dir
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else
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in_dir, max = w, h
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width = width - in_dir
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end
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if max > used_max then
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used_max = max
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end
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used_in_dir = used_in_dir + in_dir
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if width <= 0 or height <= 0 then
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if dir == "y" then
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used_in_dir = orig_height
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else
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used_in_dir = orig_width
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end
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break
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end
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end
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if dir == "y" then
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return used_max, used_in_dir
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end
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return used_in_dir, used_max
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end
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--- Reset a fixed layout. This removes all widgets from the layout.
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function reset(layout)
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for k, v in pairs(layout.widgets) do
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v:disconnect_signal("widget::updated", layout._emit_updated)
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end
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layout.widgets = {}
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layout:emit_signal("widget::updated")
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end
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--- Set the layout's fill_space property. If this property is true, the last
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-- widget will get all the space that is left. If this is false, the last widget
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-- won't be handled specially and there can be space left unused.
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function fill_space(layout, val)
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layout._fill_space = val
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layout:emit_signal("widget::updated")
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end
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local function get_layout(dir)
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local function draw(layout, ...)
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draw_fixed(dir, layout.widgets, layout._fill_space, ...)
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end
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local function fit(layout, ...)
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return fit_fixed(dir, layout.widgets, ...)
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end
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local ret = widget_base.make_widget()
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ret.draw = draw
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ret.fit = fit
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ret.add = add
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ret.reset = reset
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ret.fill_space = fill_space
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ret.widgets = {}
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ret._emit_updated = function()
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ret:emit_signal("widget::updated")
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end
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return ret
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end
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--- Returns a new horizontal fixed layout. Each widget will get as much space as it
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-- asks for and each widget will be drawn next to its neighboring widget.
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-- Widgets can be added via :add().
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function horizontal()
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return get_layout("x")
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end
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--- Returns a new vertical fixed layout. Each widget will get as much space as it
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-- asks for and each widget will be drawn next to its neighboring widget.
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-- Widgets can be added via :add().
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function vertical()
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return get_layout("y")
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end
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-- vim: filetype=lua:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=80
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