202 lines
6.0 KiB
Lua
202 lines
6.0 KiB
Lua
---------------------------------------------------------------------------
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--
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--@DOC_wibox_layout_defaults_flex_EXAMPLE@
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-- @author Uli Schlachter
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-- @copyright 2010 Uli Schlachter
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-- @classmod wibox.layout.flex
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---------------------------------------------------------------------------
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local base = require("wibox.widget.base")
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local fixed = require("wibox.layout.fixed")
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local table = table
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local pairs = pairs
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local floor = math.floor
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local gmath = require("gears.math")
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local gtable = require("gears.table")
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local flex = {}
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--@DOC_fixed_COMMON@
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--- Replace the layout children
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-- @tparam table children A table composed of valid widgets
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-- @name set_children
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-- @class function
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--- Add some widgets to the given fixed layout
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-- @param layout The layout you are modifying.
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-- @tparam widget ... Widgets that should be added (must at least be one)
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-- @name add
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-- @class function
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--- Remove a widget from the layout
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-- @tparam index The widget index to remove
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-- @treturn boolean index If the operation is successful
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-- @name remove
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-- @class function
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--- Remove one or more widgets from the layout
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-- The last parameter can be a boolean, forcing a recursive seach of the
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-- widget(s) to remove.
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-- @param widget ... Widgets that should be removed (must at least be one)
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-- @treturn boolean If the operation is successful
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-- @name remove_widgets
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-- @class function
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--- Insert a new widget in the layout at position `index`
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-- @tparam number index The position
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-- @param widget The widget
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-- @treturn boolean If the operation is successful
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-- @name insert
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-- @class function
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--- The widget used to fill the spacing between the layout elements.
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--
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-- By default, no widget is used.
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--
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--@DOC_wibox_layout_flex_spacing_widget_EXAMPLE@
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--
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-- @property spacing_widget
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-- @param widget
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--- Add spacing between each layout widgets.
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--
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--@DOC_wibox_layout_flex_spacing_EXAMPLE@
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--
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-- @property spacing
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-- @tparam number spacing Spacing between widgets.
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function flex:layout(_, width, height)
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local result = {}
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local pos,spacing = 0, self._private.spacing
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local num = #self._private.widgets
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local total_spacing = (spacing*(num-1))
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local spacing_widget = self._private.spacing_widget
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local abspace = math.abs(spacing)
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local spoffset = spacing < 0 and 0 or spacing
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local is_y = self._private.dir == "y"
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local is_x = not is_y
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local space_per_item
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if is_y then
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space_per_item = height / num - total_spacing/num
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else
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space_per_item = width / num - total_spacing/num
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end
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if self._private.max_widget_size then
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space_per_item = math.min(space_per_item, self._private.max_widget_size)
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end
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for k, v in pairs(self._private.widgets) do
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local x, y, w, h
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if is_y then
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x, y = 0, gmath.round(pos)
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w, h = width, floor(space_per_item)
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else
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x, y = gmath.round(pos), 0
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w, h = floor(space_per_item), height
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end
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table.insert(result, base.place_widget_at(v, x, y, w, h))
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pos = pos + space_per_item + spacing
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if (is_y and pos-spacing >= height) or
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(is_x and pos-spacing >= width) then
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break
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end
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if k > 1 and spacing ~= 0 and spacing_widget then
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table.insert(result, base.place_widget_at(
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spacing_widget, is_x and (x - spoffset) or x, is_y and (y - spoffset) or y,
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is_x and abspace or w, is_y and abspace or h
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))
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end
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end
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return result
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end
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-- Fit the flex layout into the given space.
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-- @param context The context in which we are 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 flex:fit(context, orig_width, orig_height)
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local used_in_dir = 0
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local used_in_other = 0
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-- Figure out the maximum size we can give out to sub-widgets
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local sub_height = self._private.dir == "x" and orig_height or orig_height / #self._private.widgets
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local sub_width = self._private.dir == "y" and orig_width or orig_width / #self._private.widgets
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for _, v in pairs(self._private.widgets) do
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local w, h = base.fit_widget(self, context, v, sub_width, sub_height)
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local max = self._private.dir == "y" and w or h
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if max > used_in_other then
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used_in_other = max
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end
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used_in_dir = used_in_dir + (self._private.dir == "y" and h or w)
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end
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if self._private.max_widget_size then
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used_in_dir = math.min(used_in_dir,
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#self._private.widgets * self._private.max_widget_size)
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end
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local spacing = self._private.spacing * (#self._private.widgets-1)
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if self._private.dir == "y" then
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return used_in_other, used_in_dir + spacing
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end
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return used_in_dir + spacing, used_in_other
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end
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--- Set the maximum size the widgets in this layout will take.
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--That is, maximum width for horizontal and maximum height for vertical.
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-- @property max_widget_size
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-- @param number
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function flex:set_max_widget_size(val)
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if self._private.max_widget_size ~= val then
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self._private.max_widget_size = val
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self:emit_signal("widget::layout_changed")
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end
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end
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local function get_layout(dir, widget1, ...)
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local ret = fixed[dir](widget1, ...)
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gtable.crush(ret, flex, true)
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ret._private.fill_space = nil
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return ret
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end
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--- Returns a new horizontal flex layout. A flex layout shares the available space
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-- equally among all widgets. Widgets can be added via :add(widget).
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-- @tparam widget ... Widgets that should be added to the layout.
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-- @function wibox.layout.flex.horizontal
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function flex.horizontal(...)
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return get_layout("horizontal", ...)
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end
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--- Returns a new vertical flex layout. A flex layout shares the available space
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-- equally among all widgets. Widgets can be added via :add(widget).
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-- @tparam widget ... Widgets that should be added to the layout.
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-- @function wibox.layout.flex.vertical
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function flex.vertical(...)
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return get_layout("vertical", ...)
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end
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--@DOC_widget_COMMON@
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--@DOC_object_COMMON@
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return flex
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-- vim: filetype=lua:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80
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