On 2011-05-07 Mojca Miklavec <[email protected]> wrote:
> On Fri, May 6, 2011 at 21:08, Marco wrote:
>
> > On 2011-05-06 Mojca Miklavec wrote:
> >
> >> > Looks like context needs a package manager.
> >>
> >> [...] but I admit that I miss some GUI (but then
> >> again I have no idea how to write a portable GUI).
> >
> > There are several possibilities, GTK+ is well
> > documented, ported to many platforms and operating
> > systems (However, maybe not to all, ConTeXt supports)
> > and has Lua bindings.
>
> If you can prepare a very simple example and explain how
> to compile it on windows, mac and windows ...
A simple example of a GUI is attached and may serve as a
starting point (questions to the example maybe better
off-list, since it's not at all ConTeXt related).
I don't know which packages are required on windows or
macos. On linux and solaris it is sufficient to install
GTK and the lua-gtk bindings.
Marco
#! /usr/bin/env lua
Mainwin = {}
Mainwin.__index = Mainwin
List = {
'Just',
'some',
'random',
'stuff',
'for',
'demonstration',
}
local function UpdateProgressBar(bar)
local oldFrac = gtk.progress_bar_get_fraction(bar)
local frac = 1/#List
if (oldFrac + frac >= 1)
then
frac = 0
oldFrac = 1
gtk.main_quit()
end
gtk.progress_bar_set_fraction(bar, oldFrac + frac)
end
function Progressbar()
local progress = gtk.progress_bar_new()
gtk.progress_bar_set_text(progress, "Processingâ¦")
gtk.progress_bar_set_fraction(progress, 0)
return progress
end
function Mainwin.new()
local self = {}
setmetatable(self, Mainwin)
-- Set main window size, title, â¦
self.w = gtk.window_new(gtk.WINDOW_TOPLEVEL)
self.w:set_title("My Program")
self.w:connect('destroy', gtk.main_quit)
self.w:set_default_size(400, 400)
-- Vertical box
local vbox = gtk.vbox_new(false, 10)
vbox:set_border_width(5)
self.w:add(vbox)
-- Tool bar
local toolbar = gtk.toolbar_new()
vbox:pack_start(toolbar, false, true, 0)
-- Tool bar: items
local items = {
{ "gtk-go-forward", StartProcessing },
{ "SEPARATOR", nil },
{ "gtk-quit", gtk.main_quit } }
-- Tool bar: add items to tool bar
for _, item in pairs(items) do
local stock = item[1]
local handler = item[2]
local button, id
if stock == 'SEPARATOR' then
button = gtk.separator_tool_item_new()
else
button = gtk.tool_button_new_from_stock(stock)
id = button:connect("clicked", handler, self)
end
toolbar:insert(button, -1)
end
-- Progress bar
progressbar = Progressbar()
vbox:pack_start(progressbar, false, true, 0)
-- Scroll window
local scrollwindow = gtk.scrolled_window_new(nil, nil)
vbox:pack_start(scrollwindow, true, true, 0)
-- Tree view
local treeview = gtk.tree_view_new()
scrollwindow:add(treeview)
-- create store
local store = gtk.tree_store_new(3,
glib.TYPE_INT, -- [0] some ID
glib.TYPE_STRING, -- [1] path / file name
glib.TYPE_STRING) -- [2] Status
treeview:set_model(store)
-- column with text
local r, c
r = gtk.cell_renderer_text_new()
c = gtk.tree_view_column_new_with_attributes("File", r, "text", 1, nil)
treeview:append_column(c)
c = gtk.tree_view_column_new_with_attributes("Status", r, "text", 2, nil)
treeview:append_column(c)
-- add some items
local iter1 = gtk.new "TreeIter"
for i = 1, #List
do
store:append(iter1, nil)
store:set(iter1, 0, i, 1, List[i], -1)
end
self.w:show_all()
return self
end
function StartProcessing()
DoStartProcessing_c = gnome.closure(DoStartProcessing)
glib.timeout_add(200,
DoStartProcessing_c,
DoStartProcessing)
end
function DoStartProcessing()
UpdateProgressBar(progressbar)
return true
end
------------------
-- Main Program --
------------------
require "gtk"
mainwin = Mainwin.new()
gtk.main()
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