[E-Dev-Day-US-2015][1/9] Key Note (Raster)

Enlightenment Developer Day2015, Samsung Research America, Mountainview

Thanks to

r

Carsten Haitzler

<[email protected]>

<[email protected]>

mailto:[email protected]

mailto:[email protected]

Discussion Starters“I came here for a good argument”

The follow are not intended as solutions, but as

discussion starters to explore and find solutions.

Some Important TopicsThings to discuss

“BOB”

Interfaces

Some Important TopicsThings to discuss

“BOB”… or whatever we will call it

Goals:


Goals:

– Replace Edje


Goals:

– Replace Edje– Replace / Augment Elementary


Goals:

– Replace Edje– Replace / Augment Elementary– Simplify internal logic code by using Lua


Goals:

– Replace Edje– Replace / Augment Elementary– Simplify internal logic code by using Lua– Allow easy / trivial modifications by developers with minimal

effort


Goals:


effort– Simplify interaction API from code (just properties(+

messages?))


Goals:



messages?))– Simplify switching “BOBjects” by state in Lua tables and

transferring them


Goals:– Replace Edje– Replace / Augment Elementary– Simplify internal logic code by using Lua– Allow easy / trivial modifications by developers with minimal


messages?))– Simplify switching “BOBjects” by state in Lua tables and

transferring them– Provide GUI editor by default


Goals:

– Replace Edje– Replace / Augment Elementary– Simplify internal logic code by using Lua– Allow easy / trivial modifications by developers with minimal effort– Simplify interaction API from code (just properties(+ messages?))– Simplify switching “BOBjects” by state in Lua tables and transferring

them– Provide GUI editor by default

● No compiler like edje_cc


Goals:– Replace Edje– Replace / Augment Elementary– Simplify internal logic code by using Lua– Allow easy / trivial modifications by developers with minimal effort– Simplify interaction API from code (just properties(+ messages?))– Simplify switching “BOBjects” by state in Lua tables and transferring them– Provide GUI editor by default

● No compiler like edje_cc● Output files are directly editable again - always


● Need a name for it (and enough of calling everything Esomething)



● Need a start (LuaJIT executor as a library)




– Needs to be able to load and unload pices of Lua code




– Needs to be able to load and unload pices of Lua code● Must be able to GC/free unused code and data




– Needs to be able to load and unload pices of Lua code● Must be able to GC/free unused code and data● Also C side resources need to be deleted with Lua data





– Need a way to source Lua from multiple “BOB” files (user, app, system)






– Need to begin to expose EO objects into Lua






– Need to begin to expose EO objects into Lua● Each “BOB” master container






– Need to begin to expose EO objects into Lua● Each “BOB” master container● Child / Utility objects too (Evas basic objects)





– Need a way to source Lua from multiple “BOB” files (user, app, system)– Need to begin to expose EO objects into Lua

● Each “BOB” master container● Child / Utility objects too (Evas basic objects)

● Start writing “BOB”jects to test the above (Buttons, Sliders, Boxes, Tables etc.)

“BOB” Sample structure… or whatever we will call it

class button { inherit sys.widget; func init () { self.text = "" self.obj.bg = Rectangle:new() self.obj.bg.color = { 64, 64, 64, 255 } self.obj.bg.visible = true self.obj.label = Text:new() self.obj.label.color = { 255, 255, 255, 255 } self.obj.label.text = "Button" self.obj.label.visible = true self:update() } func text_set (text) { self.text = text self:update() } func color_set @slot1 { r = r / 2 g = g / 2 b = b / 2 a = a / 2 } func layout () { -- @slot1 self.obj.bg:resize(self.w, self.h) -- @slot1 end self.obj.icon:move(5, 5) self.obj.label.text = self.text self.obj.label:move(self.obj.icon.x + 5, 5) -- @slot2 x = self.x y = self.y –- @slot3 –- @slot4 –- @slot5 self.obj:move(x, y) }}

obj { class sys.box; name "base"; prop orient = vert; func override init { self.padding = { 5, 5, 5, 5 } } func new shimmer (time) { self.shimmer_anim = anim(time, function (obj, pos) obj.shimmer_x = (1 - pos) * (sin(pos * 20) * 30) obj.shimmer_y = (1 - pos) * (cos(pos * 30) * 5) obj:update() end) } func insert layout @slot3 { x = x + self.shimmer_x y = y + self.shimmer_y } func replace layout @slot5 { y = y / 2 } func delete layout @slot7; obj { class sys.button; name "hello"; prop label = "Hello"; pack end; } obj { extend_class sys.button; prop label = "Button at start"; pack start; } obj { local_class button; prop label = "Button at end"; pack end; obj { class sys.icon; prop file = "close-button"; } } obj { parent_class button; prop label = "Button at end"; pack end; }}

Not actual text – BOB file structure + metadata

Actual Lua cript held as verbatim text in BOB file


InterfacesFixing our APIs and march to EFL 2.0

● Insanely important



– Will define what EFL 2.0 will look like



– Will define what EFL 2.0 will look like– Will improve our API and learning curve



– Will define what EFL 2.0 will look like– Will improve our API and learning curve– Will make bindings seamless and clean



– Will define what EFL 2.0 will look like– Will improve our API and learning curve– Will make bindings seamless and clean– Is our opportunity to fix API mistakes




● Decisions to make





– Lots of fine grained classes that cover a specific feature






or






or– Larger classes which may be partially implemented


● Color class

+

● Geometry Class

+

● Stacking Class

+

● Layer Class

...


● Color class

+

● Geometry Class

+

● Stacking Class

+

● Layer Class

...

Vs.


● Color class

+

● Geometry Class

+

● Stacking Class

+

● Layer Class

...

● Color class

+

● General Graphical Object Class

– Geometry may be implemented

– Stacking may be implemented

– Layering may be implemented

...

Vs.


● Supporting shortnames for C



– Makes C API match C++/Lua/JS/Python



– Makes C API match C++/Lua/JS/Python– Forces methods of the same name (in non-C langs) to have

the same signature




the same signature● Better API design IMHO





– Makes EFL easier to use/learn in C





– Makes EFL easier to use/learn in C– Brings out name conflicts that happen in C++/Lua/JS/Python

into C






into C● We find these issues early, not late






into C● We find these issues early, not late

– Just need a pass across all efl .eo files to generate a shortnames set of .c/h files


efl_gfx_shape_color_set() → efl_color_set()

efl_colorclass_color_set() → efl_color_set()

efl_gfx_shape_outline_color_set() → efl_color_set()

DISCUSSSlap eachother with trouts

DISCUSSSlap eachother with trouts

Software

[E-Dev-Day-US-2015][1/9] Key Note (Raster)