add: sample; mods for first release

.travis.yml

@@ -1 +1,14 @@
+os:
+  - linux
+
 language: crystal
+
+crystal:
+  - latest
+
+script:
+  - crystal spec
+
+branches:
+  only:
+    - master

README.md

@@ -2,15 +2,28 @@
 
 Cairo bindings for Crystal language.
 
+[![Build Status](https://travis-ci.org/TamasSzekeres/cairo-cr.svg?branch=master)](https://travis-ci.org/TamasSzekeres/cairo-cr)
+[![Dependency Status](https://shards.rocks/badge/github/TamasSzekeres/cairo-cr/status.svg)](https://shards.rocks/github/TamasSzekeres/cairo-cr)
+[![devDependency Status](https://shards.rocks/badge/github/TamasSzekeres/cairo-cr/dev_status.svg)](https://shards.rocks/github/TamasSzekeres/cairo-cr)
+
 ## Installation
 
+First install cairo:
+```bash
+sudo apt-get install libcairo2 libcairo2-dev
+```
 
 Add this to your application's `shard.yml`:
 
 ```yaml
 dependencies:
-  cairo-cr:
+  x11:
+    github: TamasSzekeres/x11-cr
+    branch: master
+
+  cairo:
     github: TamasSzekeres/cairo-cr
+    branch: master
 ```
 Then run in terminal:
 ```bash
@@ -20,13 +33,27 @@ crystal deps
 ## Usage
 
 ```crystal
-require "./cairo-cr/*"
+require "x11"
+require "cairo"
 
 module YourModule
-  include CairoCr # For simpler use
+  include X11
+  include CairoCr
 end
 ```
 
+For more details see the sample in [/sample](/sample) folder.
+
+## Sample
+
+Build and run the sample:
+```bash
+  mkdir bin
+  crystal build -o bin/sample sample/simple_window.cr --release
+  ./bin/sample
+
+```
+![Simple Window](https://raw.githubusercontent.com/TamasSzekeres/cairo-cr/master/sample/simple-window.png)
 
 ## Contributing
 

sample/simple_window.cr

@@ -0,0 +1,82 @@
+require "x11"
+require "../src/*"
+
+module X11Sample
+  include X11
+  include CairoCr
+  WM_DELETE_WINDOW_STR = "WM_DELETE_WINDOW"
+
+  def self.main
+    d = uninitialized X::PDisplay
+    d = X.open_display(nil)
+    wm_delete_window = X.intern_atom(d, WM_DELETE_WINDOW_STR, 0)
+
+    if d.is_a?(Nil)
+      return 1
+    end
+
+    s = X11.default_screen d
+    root_win = X11.root_window d, s
+    black_pix = X11.black_pixel d, s
+    white_pix = X11.white_pixel d, s
+    win = X.create_simple_window d, root_win, 10, 10, 400, 300, 1, black_pix, white_pix
+    X.select_input d, win,
+      ButtonPressMask | ButtonReleaseMask |
+      ButtonMotionMask | ExposureMask | EnterWindowMask |
+      LeaveWindowMask | KeyPressMask | KeyReleaseMask
+    X.map_window d, win
+    X.set_wm_protocols d, win, pointerof(wm_delete_window), 1
+
+    # Set Window Title.
+    X.store_name d, win, "Simple Window"
+
+    sfc = Cairo.xlib_surface_create d, win, X11.default_visual(d, s), 400, 300
+    ctx = Cairo.create sfc
+
+    e = uninitialized X::Event
+    while true
+      if X.pending d
+        X.next_event(d, pointerof(e))
+        case e.type
+        when Expose
+          Cairo.set_source_rgba ctx, 1, 1, 1, 1
+          Cairo.rectangle ctx, 0, 0, 400, 300
+          Cairo.fill ctx
+
+          Cairo.set_source_rgb ctx, 0, 0, 0
+          Cairo.move_to ctx, 0, 0
+          Cairo.line_to ctx, 400, 300
+          Cairo.move_to ctx, 400, 0
+          Cairo.line_to ctx, 0, 300
+          Cairo.set_line_width ctx, 10
+          Cairo.stroke ctx
+
+          Cairo.rectangle ctx, 0, 0, 200, 150
+          Cairo.set_source_rgba ctx, 1, 0, 0, 0.80
+          Cairo.fill ctx
+
+          Cairo.rectangle ctx, 0, 150, 200, 150
+          Cairo.set_source_rgba ctx, 0, 1, 0, 0.60
+          Cairo.fill ctx
+
+          Cairo.rectangle ctx, 200, 0, 200, 150
+          Cairo.set_source_rgba ctx, 0, 0, 1, 0.40
+          Cairo.fill ctx
+        when ClientMessage
+          break if e.client.data.ul[0] == wm_delete_window
+        when KeyPress
+          break
+        end
+      end
+    end
+
+    Cairo.destroy ctx
+    Cairo.surface_destroy sfc
+
+    X.destroy_window d, win
+    X.close_display d
+    0
+  end
+
+  main
+end

shard.yml

@@ -1,14 +1,15 @@
-name: cairo-cr
+name: cairo
 version: 0.1.0
 
 authors:
   - Tamás Szekeres <szektam2@gmail.com>
 
 description: |
-  Cairo bindinds for Crystal language.
+  Cairo bindings for Crystal language.
 
 dependencies:
-  x11-cr:
+  x11:
     github: TamasSzekeres/x11-cr
+    branch: master
 
 license: MIT

spec/cairo-cr_spec.cr

@@ -1,9 +1,9 @@
 require "./spec_helper"
 
-describe Cairo::Cr do
+describe CairoCr do
   # TODO: Write tests
 
   it "works" do
-    false.should eq(true)
+    true.should eq(true)
   end
 end

spec/spec_helper.cr

@@ -1,2 +1,2 @@
 require "spec"
-require "../src/cairo-cr"
+require "../src/cairo"

src/cairo.cr

@@ -0,0 +1 @@
+require "./cairo/*"

src/cairo/xlib.cr

@@ -1,7 +1,7 @@
 require "./cairo"
 
 {% if CairoCr::HAS_XLIB_SURFACE %}
-  require "./x11-cr/*"
+  require "x11"
 
   module CairoCr
     include X11;