minor bug fixes

example/dialog/license.lua

@@ -0,0 +1,30 @@
+return { type = 'submenu', width = 600, height = 400, float = true,
+    { type = 'panel', text = 'License', height = 40, size = 24, align = 'middle center', },
+    { wrap = true, margin = 4, text = [[
+The MIT License (MIT)
+
+Copyright (c) 2015 airstruck
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+]]  },
+    { type = 'panel', flow = 'x', height = 40,
+        {},
+        { type = 'button', text = 'Close', id = 'closeButton', width = 100, margin = 4 }
+    }
+}

example/main.lua

@@ -55,9 +55,9 @@ local mainForm = { id = 'mainWindow', type = 'panel',
             },
         },
         { text = 'Help',
-            { text = 'About Luigi', icon = 'icon/16px/Book.png', key = 'f1', },
+            { id = 'about', text = 'About Luigi', icon = 'icon/16px/Book.png', key = 'f1', },
-            { text = 'About Luigi Demo', icon = 'icon/16px/Book Red.png', key = 'f2' },
+            { id = 'aboutDemo', text = 'About Luigi Demo', icon = 'icon/16px/Book Red.png', key = 'f2' },
-            { text = 'Licenses', key = 'f3'  },
+            { id = 'license', text = 'License', key = 'f3'  },
         },
     },
     { type = 'panel', id = 'toolbar', style = 'toolbar', flow = 'x',
@@ -192,6 +192,21 @@ layout.menuQuit:onPress(function (event) Backend.quit() end)
 
 layout.themeLight:onPress(function (event) Backend.quit() end)
 
+-- license dialog
+
+local licenseDialog = Layout(require 'dialog.license')
+
+licenseDialog.closeButton:onPress(function()
+    licenseDialog:hide()
+end)
+
+layout.license:onPress(function()
+    licenseDialog:show()
+end)
+
+
+-- show the main layout
+
 layout:show()
 
-Backend.run()
+Backend.run() -- only needed when using ffisdl backend

luigi/backend/ffisdl.lua

@@ -38,6 +38,8 @@ ffi.gc(renderer, sdl.destroyRenderer)
 
 local Backend = {}
 
+Backend.sdl = sdl
+
 local callback = {
     draw = function () end,
     resize = function () end,
@@ -274,6 +276,9 @@ local stack = {}
 Backend.pop = function ()
     local history = stack[#stack]
     local color = history.color or { 0, 0, 0, 255 }
+    Backend.setColor(history.color or { 0, 0, 0, 255 })
+    Backend.sdl = sdl
+
     sdl.setRenderDrawColor(renderer,
         color[1], color[2], color[3], color[4] or 255)
     sdl.renderSetClipRect(renderer, history.scissor) -- Backend.setScissor(history.scissor)

luigi/input.lua

@@ -213,12 +213,14 @@ end
 function Input:handleReshape (layout, width, height)
     local root = layout.root
 
-    Event.Reshape:emit(layout, { target = layout })
+    if root.float then
-
+        root:reshape()
-    if not root.float then
+    else
         root.width = width
         root.height = height
     end
+
+    Event.Reshape:emit(layout, { target = layout })
 end
 
 function Input:handleWheelMove (layout, x, y)

luigi/layout.lua

@@ -215,19 +215,20 @@ Number of pixels from window's top edge.
 Widget to search within, defaults to layout root.
 --]]--
 function Layout:getWidgetAt (x, y, root)
-    local widget = root or self.root
+    if not root then
-
+        root = self.root
+    end
     -- Loop through in reverse, because siblings defined later in the tree
     -- will overdraw earlier siblings.
-    local childCount = #widget
+    for i = #root, 1, -1 do
-
+        local child = root[i]
-    for i = childCount, 1, -1 do
+        if child:isAt(x, y) then
-        local child = widget[i]
+            local inner = self:getWidgetAt(x, y, child)
-        local inner = self:getWidgetAt(x, y, child)
+            if inner then return inner end
-        if inner then return inner end
+        end
     end
 
-    if widget:isAt(x, y) then return widget end
+    if root:isAt(x, y) then return root end
 end
 
 -- Internal, called from Widget:new
@@ -325,6 +326,7 @@ function Layout:addDefaultHandlers ()
             end -- if widget.scroll
         end -- ancestor loop
     end) -- wheel move
+
 end
 
 Event.injectBinders(Layout)

luigi/renderer.lua

@@ -194,12 +194,8 @@ function Renderer:renderIconAndText (widget)
         return
     end
 
-    Backend.push()
-
     local parentY = widget.parent and widget.parent:getY() or 0
 
-    Backend.setScissor(x, math.max(y, parentY), w, h)
-
     -- calculate position for icon and text based on alignment and padding
     local iconX, iconY, x1, y1, x2, y2 = self:positionIcon(
         widget, x, y, x + w, y + h)
@@ -242,6 +238,9 @@ function Renderer:renderIconAndText (widget)
         end
     end
 
+    Backend.push()
+    Backend.setScissor(x, math.max(y, parentY), w, h)
+
     -- draw the icon
     if icon then
         iconX, iconY = math.floor(iconX), math.floor(iconY)
@@ -252,7 +251,7 @@ function Renderer:renderIconAndText (widget)
     end
 
     -- draw the text
-    if text and w > 1 then
+    if text and textX and textY and w > 1 then
         textX, textY = math.floor(textX), math.floor(textY)
         Backend.draw(widget.textData, textX, textY)
     end

luigi/widget.lua

@@ -351,6 +351,28 @@ function Widget:calculateDimension (name)
     return size
 end
 
+local function calculateRootPosition (self, axis)
+    local value = (axis == 'x' and self.left) or (axis == 'y' and self.top)
+
+    if value then
+        self.position[axis] = value
+        return value
+    end
+
+    local ww, wh = Backend.getWindowSize()
+
+    if axis == 'x' and self.width then
+        value = (ww - self.width) / 2
+    elseif axis == 'y' and self.height then
+        value = (wh - self.height) / 2
+    else
+        value = 0
+    end
+
+    self.position[axis] = value
+    return value
+end
+
 function Widget:calculatePosition (axis)
     checkReshape(self)
 
@@ -360,10 +382,8 @@ function Widget:calculatePosition (axis)
     local parent = self.parent
     local scroll = 0
     if not parent then
-        self.position[axis] = axis == 'x' and (self.left or 0)
+        return calculateRootPosition(self, axis)
-            or axis == 'y' and (self.top or 0)
+    else
-        return self.position[axis]
-    elseif parent then
         scroll = axis == 'x' and (parent.scrollX or 0)
             or axis == 'y' and (parent.scrollY or 0)
     end

luigi/widget/menu/item.lua

@@ -123,6 +123,25 @@ local function registerLayoutEvents (self)
         end
     end)
 
+    menuLayout:onPress(function (event)
+        for widget in event.target:eachAncestor(true) do
+            if widget.type == 'menu.item' and #widget.items == 0 then
+                menuLayout:hide()
+                deactivateSiblings(self.rootMenu[1])
+            end
+        end
+    end)
+
+    menuLayout:onPressEnd(function (event)
+        for widget in event.target:eachAncestor(true) do
+            if widget.type == 'menu.item' and #widget.items == 0
+            and event.target ~= event.origin then
+                widget:bubbleEvent('Press', event)
+            end
+        end
+    end)
+
+
     menuLayout:onEnter(activate)
     menuLayout:onPressEnter(activate)
 end

luigi/widget/text.lua

@@ -200,6 +200,20 @@ return function (self)
     end)
 
     self:onKeyPress(function (event)
+
+        -- ignore tabs (keyboard navigation)
+        if event.key == 'tab' then
+            return
+        end
+
+        -- focus next widget on enter (keyboard navigation)
+        if event.key == 'return' then
+            self.layout:focusNextWidget()
+            -- if the next widget is a button, allow the event to propagate
+            -- so that the button is pressed (TODO: is this a good idea?)
+            return self.layout.focusedWidget.type ~= 'button' or nil
+        end
+
         if event.key == 'backspace' then
 
             if not deleteRange(self) then