Convert the fixed layout to the new widget system

Signed-off-by: Uli Schlachter <psychon@znc.in>

lib/wibox/layout/fixed.lua

@@ -12,13 +12,12 @@ local pairs = pairs
 
 local fixed = {}
 
---- Draw a fixed layout. Each widget gets just the space it asks for.
+--- Layout a fixed layout. Each widget gets just the space it asks for.
 -- @param context The context in which we are drawn.
--- @param cr The cairo context to use.
 -- @param width The available width.
 -- @param height The available height.
--- @return The total space needed by the layout.
-function fixed:draw(context, cr, width, height)
+function fixed:layout(context, width, height)
+    local result = {}
     local pos,spacing = 0,self._spacing or 0
 
     for k, v in pairs(self.widgets) do
@@ -46,16 +45,16 @@ function fixed:draw(context, cr, width, height)
             (self.dir ~= "y" and pos-spacing > width) then
             break
         end
-        base.draw_widget(context, cr, v, x, y, w, h)
+        table.insert(result, widget_base.place_widget_at(v, x, y, w, h))
     end
+    return result
 end
 
 --- Add a widget to the given fixed layout
 function fixed:add(widget)
     widget_base.check_widget(widget)
     table.insert(self.widgets, widget)
-    widget:weak_connect_signal("widget::updated", self._emit_updated)
-    self._emit_updated()
+    self:emit_signal("widget::layout_changed")
 end
 
 --- Fit the fixed layout into the given space
@@ -101,11 +100,8 @@ end
 
 --- Reset a fixed layout. This removes all widgets from the layout.
 function fixed:reset()
-    for k, v in pairs(self.widgets) do
-        v:disconnect_signal("widget::updated", self._emit_updated)
-    end
     self.widgets = {}
-    self:emit_signal("widget::updated")
+    self:emit_signal("widget::layout_changed")
 end
 
 --- Set the layout's fill_space property. If this property is true, the last
@@ -113,7 +109,7 @@ end
 -- won't be handled specially and there can be space left unused.
 function fixed:fill_space(val)
     self._fill_space = val
-    self:emit_signal("widget::updated")
+    self:emit_signal("widget::layout_changed")
 end
 
 local function get_layout(dir)
@@ -127,9 +123,6 @@ local function get_layout(dir)
 
     ret.dir = dir
     ret.widgets = {}
-    ret._emit_updated = function()
-        ret:emit_signal("widget::updated")
-    end
 
     return ret
 end
@@ -152,7 +145,7 @@ end
 -- @param spacing Spacing between widgets.
 function fixed:set_spacing(spacing)
     self._spacing = spacing
-    self:emit_signal("widget::updated")
+    self:emit_signal("widget::layout_changed")
 end
 
 return fixed

spec/wibox/layout/fixed_spec.lua

@@ -5,6 +5,7 @@
 
 local fixed = require("wibox.layout.fixed")
 local utils = require("wibox.test_utils")
+local p = require("wibox.widget.base").place_widget_at
 
 describe("wibox.layout.fixed", function()
     local layout
@@ -12,16 +13,12 @@ describe("wibox.layout.fixed", function()
         layout = fixed.vertical()
     end)
 
-    before_each(utils.stub_draw_widget)
-    after_each(utils.revert_draw_widget)
-
     it("empty layout fit", function()
         assert.widget_fit(layout, { 10, 10 }, { 0, 0 })
     end)
 
-    it("empty layout draw", function()
-        layout:draw(nil, nil, 0, 0)
-        utils.check_widgets_drawn({})
+    it("empty layout layout", function()
+        assert.widget_layout(layout, { 0, 0 }, {})
     end)
 
     describe("with widgets", function()
@@ -42,12 +39,11 @@ describe("wibox.layout.fixed", function()
                 assert.widget_fit(layout, { 100, 100 }, { 15, 35 })
             end)
 
-            it("draw", function()
-                layout:draw("wibox", "cr", 100, 100)
-                utils.check_widgets_drawn({
-                    { first,  0,  0, 100, 10 },
-                    { second, 0, 10, 100, 15 },
-                    { third,  0, 25, 100, 10 },
+            it("layout", function()
+                assert.widget_layout(layout, { 100, 100 }, {
+                    p(first,  0,  0, 100, 10),
+                    p(second, 0, 10, 100, 15),
+                    p(third,  0, 25, 100, 10),
                 })
             end)
         end)
@@ -57,28 +53,25 @@ describe("wibox.layout.fixed", function()
                 assert.widget_fit(layout, { 5, 100 }, { 5, 35 })
             end)
 
-            it("draw", function()
-                layout:draw("wibox", "cr", 5, 100)
-                utils.check_widgets_drawn({
-                    { first,  0,  0, 5, 10 },
-                    { second, 0, 10, 5, 15 },
-                    { third,  0, 25, 5, 10 },
+            it("layout", function()
+                assert.widget_layout(layout, { 5, 100 }, {
+                    p(first,  0,  0, 5, 10),
+                    p(second, 0, 10, 5, 15),
+                    p(third,  0, 25, 5, 10),
                 })
             end)
         end)
 
         describe("without enough width", function()
             it("fit", function()
-                -- XXX: Is this really what should happen?
                 assert.widget_fit(layout, { 100, 20 }, { 15, 20 })
             end)
 
-            it("draw", function()
-                layout:draw("wibox", "cr", 100, 20)
-                utils.check_widgets_drawn({
-                    { first,  0,  0, 100, 10 },
-                    { second, 0, 10, 100, 10 },
-                    { third,  0, 20, 100,  0 },
+            it("layout", function()
+                assert.widget_layout(layout, { 100, 20 }, {
+                    p(first,  0,  0, 100, 10),
+                    p(second, 0, 10, 100, 10),
+                    p(third,  0, 20, 100,  0),
                 })
             end)
         end)