Glimmer DSL for GTK 0.0.9
Glimmer DSL for GTK enables building desktop applications with Ruby-GNOME (including Cairo graphics) using MRI Ruby.
GTK (aka GIMP-Toolkit or [incorrectly] GNOME-Toolkit) is the premiere desktop GUI toolkit on Linux (included in GNOME flavors of Linux, where Glimmer DSL for GTK's forte is), which also runs on Mac (Quartz GTK+) and Windows.
Glimmer DSL for GTK aims to supercharge productivity and maintainability in developing Ruby-GNOME applications by providing a DSL similar to Glimmer DSL for SWT having:
Hello, World!
window {
title 'Hello, World!'
label('Hello, World!')
}.show
| Linux | Mac | Windows |
|---|---|---|
 |  |  |
NOTE: Glimmer DSL for GTK is currently in early alpha mode (incomplete proof-of-concept). If you want it developed faster, then open an issue report. I have completed some GitHub project features much faster before due to issue reports and pull requests. Please help make better by contributing, adopting for small or low risk projects, and providing feedback. It is still an early alpha, so the more feedback and issues you report the better.
Glimmer DSL Comparison Table:
| DSL | Platforms | Native? | Vector Graphics? | Pros | Cons | Prereqs |
|---|---|---|---|---|---|---|
| Glimmer DSL for SWT (JRuby Desktop Development GUI Framework) | Mac / Windows / Linux | Yes | Yes (Canvas Shape DSL) | Very Mature / Scaffolding / Native Executable Packaging / Custom Widgets | Slow JRuby Startup Time / Heavy Memory Footprint | Java / JRuby |
| Glimmer DSL for Opal (Pure Ruby Web GUI and Auto-Webifier of Desktop Apps) | All Web Browsers | No | Yes (Canvas Shape DSL) | Simpler than All JavaScript Technologies / Auto-Webify Desktop Apps | Setup Process / Only Rails 5 Support for Now | Rails |
| Glimmer DSL for LibUI (Prerequisite-Free Ruby Desktop Development GUI Library) | Mac / Windows / Linux | Yes | Yes (Area API) | Fast Startup Time / Light Memory Footprint | LibUI is an Incomplete Mid-Alpha Only | None Other Than MRI Ruby |
| Glimmer DSL for Tk (MRI Ruby Desktop Development GUI Library) | Mac / Windows / Linux | Some Native-Themed Widgets (Not Truly Native) | Yes (Canvas) | Fast Startup Time / Light Memory Footprint | Widgets Do Not Look Truly Native, Espcially on Linux | ActiveTcl / MRI Ruby |
| Glimmer DSL for GTK (Ruby-GNOME Desktop Development GUI Library) | Mac / Windows / Linux | Only on Linux | Yes (Cairo) | Complete Access to GNOME Features on Linux (Forte) | Not Native on Mac and Windows | None Other Than MRI Ruby on Linux / Brew Packages on Mac / MSYS & MING Toolchains on Windows / MRI Ruby |
| Glimmer DSL for FX (FOX Toolkit Ruby Desktop Development GUI Library) | Mac (requires XQuartz) / Windows / Linux | No | Yes (Canvas) | No Prerequisites on Windows (Forte Since Binaries Are Included Out of The Box) | Widgets Do Not Look Native / Mac Usage Obtrusively Starts XQuartz | None Other Than MRI Ruby on Windows / XQuarts on Mac / MRI Ruby |
| Glimmer DSL for JFX (JRuby JavaFX Desktop Development GUI Library) | Mac / Windows / Linux | No | Yes (javafx.scene.shape and javafx.scene.canvas) | Rich in Custom Widgets | Slow JRuby Startup Time / Heavy Memory Footprint / Widgets Do Not Look Native | Java / JRuby / JavaFX SDK |
| Glimmer DSL for Swing (JRuby Swing Desktop Development GUI Library) | Mac / Windows / Linux | No | Yes (Java2D) | Very Mature | Slow JRuby Startup Time / Heavy Memory Footprint / Widgets Do Not Look Native | Java / JRuby |
| Glimmer DSL for XML (& HTML) | All Web Browsers | No | Yes (SVG) | Programmable / Lighter-weight Than Actual XML | XML Elements Are Sometimes Not Well-Named (Many Types of Input) | None |
| Glimmer DSL for CSS | All Web Browsers | No | Yes | Programmable | CSS Is Over-Engineered / Too Many Features To Learn | None |
GNOME-based Linux installations do not need any prerequisites since they have GTK built-in, so you can skip to Setup right away.
Still, if you run into issues installing the GTK gem in Setup, you may try these commands first:
sudo apt-get install libgtk-3-dev
Or run this command if all else fails:
sudo apt install -y -V libgirepository1.0-dev
On the Mac, make sure to:
brew install adwaita-icon-themebrew install gtk+3 / brew install gtk+4 / brew install gtk+Make sure to install Ruby with MSYS & MING toolchains from RubyInstaller
Run this command to install directly:
gem install glimmer-dsl-gtk
Add the following to Gemfile:
gem 'glimmer-dsl-gtk', '~> 0.0.9'
And, then run:
bundle
Require the library and mixin the Glimmer module to utilize the Glimmer GUI DSL for GTK:
require 'glimmer-dsl-gtk'
include Glimmer
window {
title 'Demo'
on(:destroy) do
puts 'Bye Bye'
::Gtk.main_quit
end
}.show
For actual application development outside of simple demos, mixin the Glimmer module into a custom application class instead:
require 'glimmer-dsl-gtk'
class SomeGlimmerApplication
include Glimmer
def launch
application('org.glimmer.hello-application', :flags_none) {
on(:activate) do |app|
application_window(app) {
title 'Actual Application'
}.present
end
}.run
end
end
SomeGlimmerApplication.new.launch
application_window(app) for Gtk::ApplicationWindow.new(app)). Keywords can be nested under other keywords to represent the true hierarchy of nested widgets on the screen (e.g. window { label('Hello') } is a label nested under a window). Note that widget objects returned are proxies of the GTK widget counterparts. This shields consumers of GTK from its lower-level details via composition (Proxy Design Pattern). To access lower-level GTK widget, simply call #gtk method on widget proxy object (e.g. @w = window {...}; @w.gtk # Gtk::Window widget object).window {|w| ... }):
window {title 'Hello, World'} sets title property of window)on(signal) { ... } syntax (e.g. on(:activate) { do_something })In Smalltalk-MVC (Model View Controller Architectural Pattern), the View is an active View that observes the Model for changes and updates itself.
This can be achieved with the Glimmer GUI DSL using the observe keyword, which takes a model (any object, including self) and attribute Symbol or String expression (e.g. :count or 'address.street').
The model is automatically enhanced as an Glimmer::DataBinding::ObservableModel / Glimmer::DataBinding::ObservableHash / Glimmer::DataBinding::ObservableArray depending on its type to support notifying observers of attribute changes (when performed using the attribute writer, which automatically calls added method notify_observers(attribute))
Note that it is usually recommended to observe external model objects (not self), but self is OK in very simple cases or presentation-related attributes only.
Cairo is the engine behind drawing arbitrary 2D geometric shapes in GTK.
In Glimmer DSL for GTK, you can draw Cairo shapes declaratively in a way similar to how SVG works, but using one language; Ruby, thus being able to utilize Ruby logic (e.g. if statement or each loop) with it effortlessly when needed. Declarative syntax also yields less code that is simpler, not dependent on ordering of nested properties, and more understandable/maintainable.
Below is a quick tutorial consisting of samples inspired and ported from Mohit Sindhwani's blog post "Cairo with Ruby - Samples using RCairo".
require 'glimmer-dsl-gtk'
include Glimmer
window {
title 'Arc'
default_size 256, 256
drawing_area {
# Surface Paint
paint 242.25, 242.25, 242.25
# Set up the parameters
xc = 128.0
yc = 128.0
radius = 100.0
angle1 = 45.0 * (Math::PI/180.0) # angles are specified
angle2 = 180.0 * (Math::PI/180.0) # in radians
# The main arc
arc(xc, yc, radius, angle1, angle2) {
stroke 0, 0, 0
line_width 10
}
# Draw helping lines
# First, the circle at the centre
arc(xc, yc, 10.0, 0, 2*Math::PI) {
fill 255, 51, 51, 0.6
}
# Then, the lines reaching out
path {
arc xc, yc, radius, angle1, angle1
line_to xc, yc
arc xc, yc, radius, angle2, angle2
line_to xc, yc
stroke 255, 51, 51, 0.6
line_width 6
}
}
}.show
require 'glimmer-dsl-gtk'
include Glimmer
window {
title 'Arc Negative'
default_size 256, 256
drawing_area {
# Surface Paint
paint 255, 255, 255
# Set up the parameters
xc = 128.0
yc = 128.0
radius = 100.0
angle1 = 45.0 * (Math::PI/180.0) # angles are specified
angle2 = 180.0 * (Math::PI/180.0) # in radians
# The main negative arc
arc_negative(xc, yc, radius, angle1, angle2) {
stroke 0, 0, 0
line_width 10
}
# Draw helping lines
# First, the circle at the centre
arc(xc, yc, 10.0, 0, 2*Math::PI) {
fill 255, 51, 51, 0.6
}
# Then, the lines reaching out
path {
arc(xc, yc, radius, angle1, angle1)
line_to(xc, yc)
arc(xc, yc, radius, angle2, angle2)
line_to(xc, yc)
stroke 255, 51, 51, 0.6
line_width 6
}
}
}.show
require 'glimmer-dsl-gtk'
include Glimmer
window {
title 'Clip'
default_size 256, 256
drawing_area {
# Surface Paint
paint 255, 255, 255
# Designate arc as the clipping area
arc(128.0, 128.0, 76.8, 0, 2 * Math::PI) {
clip true
}
# Rectangle will get clipped by arc
rectangle(0, 0, 256, 256) {
fill 0, 0, 0
}
# Path will get clipped by arc
path {
move_to 0, 0
line_to 256, 256
move_to 256, 0
line_to 0, 256
stroke 0, 255, 0
line_width 10
}
}
}.show
require 'glimmer-dsl-gtk'
require 'net/http'
image_content = Net::HTTP.get(URI('https://raw.githubusercontent.com/AndyObtiva/glimmer-dsl-gtk/master/images/breaking-blue-wave.png'))
image_file = File.join(Dir.home, 'breaking-blue-wave.png')
File.write(image_file, image_content)
include Glimmer
window {
title 'Clip Image'
default_size 256, 256
drawing_area {
paint 242.25, 242.25, 242.25
arc(128.0, 128.0, 76.8, 0, 2 * Math::PI) {
clip true # designate arc as the clipping area
}
rectangle(0, 0, 256, 256) {
# Source image is from:
# - https://www.publicdomainpictures.net/en/view-image.php?image=7683&picture=breaking-blue-wave
# Converted to PNG before using it
image = Cairo::ImageSurface.from_png(image_file)
w = image.width
h = image.height
scale 256.0/w, 256.0/h, exclude: :shape # applies scale to fill source image only
fill image, 0, 0
}
}
}.show
require 'glimmer-dsl-gtk'
include Glimmer
window {
title 'Curve to'
default_size 256, 256
drawing_area {
paint 242.25, 242.25, 242.25
x=25.6
y=128.0
x1=102.4
y1=230.4
x2=153.6
y2=25.6
x3=230.4
y3=128.0
path {
move_to x, y
curve_to x1, y1, x2, y2, x3, y3
line_width 10
stroke 0, 0, 0
}
path {
move_to x,y
line_to x1,y1
move_to x2,y2
line_to x3,y3
line_width 6
stroke 255, 51, 51, 0.6
}
}
}.show
require 'glimmer-dsl-gtk'
include Glimmer
window {
title 'Dashes'
default_size 256, 256
drawing_area {
paint 242.25, 242.25, 242.25
dashes = [ 50.0, # ink
10.0, # skip
10.0, # ink
10.0 # skip
]
offset = -50.0
path {
move_to 128.0, 25.6
line_to 230.4, 230.4
rel_line_to -102.4, 0.0
curve_to 51.2, 230.4, 51.2, 128.0, 128.0, 128.0
line_width 10
dash dashes, offset
stroke 0, 0, 0
}
}
}.show
(note: there is no Fill and Stroke 1; this was adopted from Mohit's blog post, which only mentioned Fill and Stroke 2)
samples/cairo/fill_and_stroke2.rb
require 'glimmer-dsl-gtk'
include Glimmer
window {
title 'Fill and Stroke 2'
default_size 256, 256
drawing_area {
paint 242.25, 242.25, 242.25
path {
move_to 128.0, 25.6
line_to 230.4, 230.4
rel_line_to -102.4, 0.0
curve_to 51.2, 230.4, 51.2, 128.0, 128.0, 128.0
close_path
fill 0, 0, 255
stroke 0, 0, 0
line_width 10
}
path {
move_to 64.0, 25.6
rel_line_to 51.2, 51.2
rel_line_to -51.2, 51.2
rel_line_to -51.2, -51.2
close_path
fill 0, 0, 255
stroke 0, 0, 0
line_width 10
}
}
}.show
require 'glimmer-dsl-gtk'
include Glimmer
window {
title 'Fill Style'
default_size 256, 256
drawing_area {
paint 242.25, 242.25, 242.25
path {
rectangle 12, 12, 232, 70
path { # sub-path
arc 64, 64, 40, 0, 2*Math::PI
}
path { # sub-path
arc_negative 192, 64, 40, 0, -2*Math::PI
}
fill_rule Cairo::FILL_RULE_EVEN_ODD
line_width 6
fill 0, 178.5, 0
stroke 0, 0, 0
}
path {
rectangle 12, 12, 232, 70
path { # sub-path
arc 64, 64, 40, 0, 2*Math::PI
}
path { # sub-path
arc_negative 192, 64, 40, 0, -2*Math::PI
}
translate 0, 128
fill_rule Cairo::FILL_RULE_WINDING
line_width 6
fill 0, 0, 229.5
stroke 0, 0, 0
}
}
}.show
require 'glimmer-dsl-gtk'
include Glimmer
window {
title 'Gradient'
default_size 256, 256
drawing_area {
paint 242.25, 242.25, 242.25
# Create the Linear Pattern
rectangle(0, 0, 256, 256) {
pat = Cairo::LinearPattern.new(0.0, 0.0, 0.0, 256.0)
pat.add_color_stop_rgba(1, 0, 0, 0, 1)
pat.add_color_stop_rgba(0, 1, 1, 1, 1)
fill pat
}
# Create the radial pattern
arc(128.0, 128.0, 76.8, 0, 2 * Math::PI) {
pat = Cairo::RadialPattern.new(115.2, 102.4, 25.6,
102.4, 102.4, 128.0)
pat.add_color_stop_rgba(0, 1, 1, 1, 1)
pat.add_color_stop_rgba(1, 0, 0, 0, 1)
fill pat
}
}
}.show
require 'glimmer-dsl-gtk'
require 'net/http'
image_content = Net::HTTP.get(URI('https://raw.githubusercontent.com/AndyObtiva/glimmer-dsl-gtk/master/images/breaking-blue-wave.png'))
image_file = File.join(Dir.home, 'breaking-blue-wave.png')
File.write(image_file, image_content)
include Glimmer
window {
title 'Image'
default_size 256, 256
drawing_area {
paint 242.25, 242.25, 242.25
image = Cairo::ImageSurface.from_png(image_file)
w = image.width
h = image.height
translate 128.0, 128.0
rotate 45*Math::PI/180
scale 256.0/w, 256.0/h
translate -0.5*w, -0.5*h
paint image, 0, 0
}
}.show
samples/cairo/image_gradient.rb
require 'glimmer-dsl-gtk'
require 'net/http'
image_content = Net::HTTP.get(URI('https://raw.githubusercontent.com/AndyObtiva/glimmer-dsl-gtk/master/images/breaking-blue-wave.png'))
image_file = File.join(Dir.home, 'breaking-blue-wave.png')
File.write(image_file, image_content)
include Glimmer
window {
title 'Image Gradient'
default_size 256, 256
drawing_area {
paint 242.25, 242.25, 242.25
image = Cairo::ImageSurface.from_png(image_file)
w = image.width
h = image.height
# Load the image as a surface pattern
pattern = Cairo::SurfacePattern.new(image)
pattern.extend = Cairo::EXTEND_REPEAT
# Set up the scale matrix
pattern.matrix = Cairo::Matrix.scale(w/256.0 * 5.0, h/256.0 * 5.0)
rectangle(0, 0, 256, 256) {
translate 128.0, 128.0
rotate Math::PI / 4
scale 1/Math.sqrt(2), 1/Math.sqrt(2)
translate -128.0, -128.0
fill pattern
}
}
}.show
samples/cairo/multi_segment_caps.rb
require 'glimmer-dsl-gtk'
include Glimmer
window {
title 'Multi Segment Caps'
default_size 256, 256
drawing_area {
paint 242.25, 242.25, 242.25
path {
move_to 50.0, 75.0
line_to 200.0, 75.0
move_to 50.0, 125.0
line_to 200.0, 125.0
move_to 50.0, 175.0
line_to 200.0, 175.0
line_width 30
line_cap Cairo::LINE_CAP_ROUND
stroke 0, 0, 0
}
}
}.show
samples/cairo/rounded_rectangle.rb
require 'glimmer-dsl-gtk'
include Glimmer
window {
title 'Rounded Rectangle'
default_size 256, 256
drawing_area {
paint 242.25, 242.25, 242.25
path {
rounded_rectangle(25.6, 25.6, 204.8, 204.8, 20)
fill 127.5, 127.5, 255
line_width 10.0
stroke 127.5, 0, 0, 0.5
}
}
}.show
require 'glimmer-dsl-gtk'
include Glimmer
window {
title 'Set line cap'
default_size 256, 256
drawing_area {
paint 242.25, 242.25, 242.25
# The main code
path {
move_to 64.0, 50.0
line_to 64.0, 200.0
line_cap Cairo::LINE_CAP_BUTT # default
line_width 30
stroke 0, 0, 0
}
path {
move_to 128.0, 50.0
line_to 128.0, 200.0
line_cap Cairo::LINE_CAP_ROUND
line_width 30
stroke 0, 0, 0
}
path {
move_to 192.0, 50.0
line_to 192.0, 200.0
line_cap Cairo::LINE_CAP_SQUARE
line_width 30
stroke 0, 0, 0
}
# draw helping lines */
path {
move_to 64.0, 50.0
line_to 64.0, 200.0
move_to 128.0, 50.0
line_to 128.0, 200.0
move_to 192.0, 50.0
line_to 192.0, 200.0
line_width 2.56
stroke 255, 51, 51
}
}
}.show
samples/cairo/set_line_join.rb
require 'glimmer-dsl-gtk'
include Glimmer
window {
title 'Set line join'
default_size 256, 256
drawing_area {
paint 242.25, 242.25, 242.25
# The main code
path {
move_to 76.8, 84.48
rel_line_to 51.2, -51.2
rel_line_to 51.2, 51.2
line_join Cairo::LINE_JOIN_MITER # default
line_width 40.96
stroke 0, 0, 0
}
path {
move_to 76.8, 161.28
rel_line_to 51.2, -51.2
rel_line_to 51.2, 51.2
line_join Cairo::LINE_JOIN_BEVEL
line_width 40.96
stroke 0, 0, 0
}
path {
move_to 76.8, 238.08
rel_line_to 51.2, -51.2
rel_line_to 51.2, 51.2
line_join Cairo::LINE_JOIN_ROUND
line_width 40.96
stroke 0, 0, 0
}
}
}.show
require 'glimmer-dsl-gtk'
include Glimmer
window {
title 'Text'
default_size 256, 256
drawing_area {
paint 242.25, 242.25, 242.25
font_family = OS.linux? ? 'Sans' : (OS.mac? ? 'Helvetica' : 'Arial')
# The main code
path {
move_to 10.0, 135.0
show_text 'Hello'
font_face font_family, Cairo::FONT_SLANT_NORMAL, Cairo::FONT_WEIGHT_BOLD
font_size 90.0
line_width 2.56
fill 0, 0, 0
stroke 0, 0, 0
}
path {
move_to 70.0, 165.0
text_path 'void'
font_face font_family, Cairo::FONT_SLANT_NORMAL, Cairo::FONT_WEIGHT_BOLD
font_size 90.0
line_width 2.56
fill 127.5, 127.5, 255
stroke 0, 0, 0
}
# draw helping lines
path {
arc 10.0, 135.0, 5.12, 0, 2*Math::PI
close_path
arc 70.0, 165.0, 5.12, 0, 2*Math::PI
fill 255, 51, 51, 0.6
}
}
}.show
You can run the girb command (bin/girb if you cloned the project locally):
girb
Linux
Mac
Windows
This gives you irb with the glimmer-dsl-gtk gem loaded and the Glimmer module mixed into the main object for easy experimentation with GUI.
Gotcha: On the Mac, when you close a window opened in girb, it remains open until you enter exit or open another GUI window.
You may checkout the samples directory for examples of using Glimmer DSL for GTK.
| Linux | Mac | Windows |
|---|---|---|
| | |
Run (via installed gem):
ruby -r glimmer-dsl-gtk -e "require 'samples/hello/hello_world'"
Run (via locally cloned project):
ruby -r ./lib/glimmer-dsl-gtk.rb samples/hello/hello_world.rb
Code:
window {
title 'Hello, World!'
label('Hello, World!')
}.show
samples/hello/hello_application.rb
| Linux | Mac | Windows |
|---|---|---|
 |  |  |
Run (via installed gem):
ruby -r glimmer-dsl-gtk -e "require 'samples/hello/hello_application'"
Run (via locally cloned project):
ruby -r ./lib/glimmer-dsl-gtk.rb samples/hello/hello_application.rb
Code:
require 'glimmer-dsl-gtk'
include Glimmer
application('org.glimmer.hello-application', :flags_none) {
on(:activate) do |app|
application_window(app) {
title 'Hello, Application!'
}.present
end
}.run
| Linux | Mac | Windows |
|---|---|---|
  |   |   |
Run (via installed gem):
ruby -r glimmer-dsl-gtk -e "require 'samples/hello/hello_button'"
Run (via locally cloned project):
ruby -r ./lib/glimmer-dsl-gtk.rb samples/hello/hello_button.rb
Code:
require 'glimmer-dsl-gtk'
include Glimmer
window { |w|
title 'Hello, Button!'
button(label: 'Button') {
on(:clicked) do
message_dialog(parent: w) { |md|
title 'Information'
text 'You clicked the button'
on(:response) do
md.destroy
end
}.show
end
}
}.show
| Linux | Mac | Windows |
|---|---|---|
  |   |   |
Run (via installed gem):
ruby -r glimmer-dsl-gtk -e "require 'samples/hello/hello_entry'"
Run (via locally cloned project):
ruby -r ./lib/glimmer-dsl-gtk.rb samples/hello/hello_entry.rb
Code:
require 'glimmer-dsl-gtk'
include Glimmer
window { |w|
title 'Hello, Entry!'
default_size 300, 50
box(:vertical) {
e = entry {
on(:changed) do
puts e.text
$stdout.flush # For Windows
end
}
button(label: 'Button') {
on(:clicked) do
message_dialog(parent: w) { |md|
title 'You entered'
text e.text
on(:response) do
md.destroy
end
}.show
end
}
}
}.show
This demonstrates the very intuitive (Glimmer-only) declarative cairo shape drawing syntax for the drawing_area widget.
samples/hello/hello_drawing_area.rb
| Linux | Mac | Windows |
|---|---|---|
 |  |  |
Run (via installed gem):
ruby -r glimmer-dsl-gtk -e "require 'samples/hello/hello_drawing_area'"
Run (via locally cloned project):
ruby -r ./lib/glimmer-dsl-gtk.rb samples/hello/hello_drawing_area.rb
Code:
require 'glimmer-dsl-gtk'
include Glimmer
window {
title 'Hello, Drawing Area!'
default_size 400, 400
drawing_area {
paint 255, 255, 255
arc(85, 85, 45, (Math::PI/180)*90, -(Math::PI/180)*90) {
fill 255, 0, 0
stroke 0, 128, 255
line_width 3
}
arc(85, 185, 45, (Math::PI/180)*100, -(Math::PI/180)*30) {
fill 255, 0, 0
stroke 0, 128, 255
line_width 3
}
circle(85, 285, 45) {
fill 255, 0, 0
stroke 0, 128, 255
line_width 3
}
rectangle(140, 40, 180, 90) {
fill 255, 255, 0
stroke 255, 0, 0
line_width 3
}
rounded_rectangle(140, 140, 180, 90, 30, 20) {
fill 255, 255, 0
stroke 255, 0, 0
line_width 3
}
triangle(140, 240, 320, 240, 230, 330) {
fill 255, 255, 0
stroke 255, 0, 0
line_width 3
}
path {
move_to 160, 100
curve_to 190, 60, 200, 80, 210, 70
curve_to 240, 80, 250, 100, 260, 90
curve_to 290, 90, 300, 110, 310, 100
fill 0, 255, 0
stroke 0, 0, 255
line_width 3
}
path {
move_to 200, 150
line_to 270, 170
line_to 250, 220
line_to 220, 190
line_to 200, 200
line_to 180, 170
close_path
fill 0, 255, 0
stroke 0, 0, 255
line_width 3
}
polygon(200, 260, 270, 270, 250, 290, 220, 290, 200, 280, 180, 270) {
fill 0, 255, 0
stroke 0, 0, 255
line_width 3
}
polyline(270, 320, 250, 340, 220, 340, 200, 330, 180, 320) {
stroke 0, 0, 255
line_width 3
}
}
}.show
This demonstrates the manual (non-Glimmer) imperative cairo shape drawing syntax for the drawing_area widget (might be useful in very exceptional rare cases).
samples/hello/hello_drawing_area_manual.rb
| Linux | Mac | Windows |
|---|---|---|
 |  |  |
Run (via installed gem):
ruby -r glimmer-dsl-gtk -e "require 'samples/hello/hello_drawing_area_manual'"
Run (via locally cloned project):
ruby -r ./lib/glimmer-dsl-gtk.rb samples/hello/hello_drawing_area_manual.rb
Code:
require 'glimmer-dsl-gtk'
include Glimmer
window {
title 'Hello, Drawing Area (Manual)!'
default_size 400, 400
drawing_area {
on(:draw) do |drawing_area_widget, cairo_context|
cairo_context.set_source_rgb(255/255.0, 255/255.0, 255/255.0)
cairo_context.paint
cairo_context.arc(85, 85, 45, (Math::PI/180)*90, -(Math::PI/180)*90)
cairo_context.set_source_rgb(255, 0, 0)
cairo_context.fill
cairo_context.arc(85, 85, 45, (Math::PI/180)*90, -(Math::PI/180)*90)
cairo_context.set_source_rgb(0, 128/255.0, 255/255.0)
cairo_context.set_line_width(3)
cairo_context.stroke
cairo_context.arc(85, 185, 45, (Math::PI/180)*100, -(Math::PI/180)*30)
cairo_context.set_source_rgb(255/255.0, 0, 0)
cairo_context.fill
cairo_context.arc(85, 185, 45, (Math::PI/180)*100, -(Math::PI/180)*30)
cairo_context.set_source_rgb(0, 128/255.0, 255/255.0)
cairo_context.set_line_width(3)
cairo_context.stroke
cairo_context.circle(85, 285, 45)
cairo_context.set_source_rgb(255/255.0, 0, 0)
cairo_context.fill
cairo_context.circle(85, 285, 45)
cairo_context.set_source_rgb(0, 128/255.0, 255/255.0)
cairo_context.set_line_width(3)
cairo_context.stroke
cairo_context.rectangle(140, 40, 180, 90)
cairo_context.set_source_rgb(255/255.0, 255/255.0, 0)
cairo_context.fill
cairo_context.rectangle(140, 40, 180, 90)
cairo_context.set_source_rgb(255/255.0, 0, 0)
cairo_context.set_line_width(3)
cairo_context.stroke
cairo_context.rounded_rectangle(140, 140, 180, 90, 30, 20)
cairo_context.set_source_rgb(255/255.0, 255/255.0, 0)
cairo_context.fill
cairo_context.rounded_rectangle(140, 140, 180, 90, 30, 20)
cairo_context.set_source_rgb(255/255.0, 0, 0)
cairo_context.set_line_width(3)
cairo_context.stroke
cairo_context.triangle(140, 240, 320, 240, 230, 330)
cairo_context.set_source_rgb(255/255.0, 255/255.0, 0)
cairo_context.fill
cairo_context.triangle(140, 240, 320, 240, 230, 330)
cairo_context.set_source_rgb(255/255.0, 0, 0)
cairo_context.set_line_width(3)
cairo_context.stroke
cairo_context.new_path
cairo_context.move_to 160, 100
cairo_context.curve_to 190, 60, 200, 80, 210, 70
cairo_context.curve_to 240, 80, 250, 100, 260, 90
cairo_context.curve_to 290, 90, 300, 110, 310, 100
cairo_context.set_source_rgb(0, 255/255.0, 0)
cairo_context.fill
cairo_context.new_path
cairo_context.move_to 160, 100
cairo_context.curve_to 190, 60, 200, 80, 210, 70
cairo_context.curve_to 240, 80, 250, 100, 260, 90
cairo_context.curve_to 290, 90, 300, 110, 310, 100
cairo_context.set_source_rgb(0, 0, 255/255.0)
cairo_context.stroke
cairo_context.new_path
cairo_context.move_to 200, 150
cairo_context.line_to 270, 170
cairo_context.line_to 250, 220
cairo_context.line_to 220, 190
cairo_context.line_to 200, 200
cairo_context.line_to 180, 170
cairo_context.close_path
cairo_context.set_source_rgb(0, 255/255.0, 0)
cairo_context.fill
cairo_context.new_path
cairo_context.move_to 200, 150
cairo_context.line_to 270, 170
cairo_context.line_to 250, 220
cairo_context.line_to 220, 190
cairo_context.line_to 200, 200
cairo_context.line_to 180, 170
cairo_context.close_path
cairo_context.set_source_rgb(0, 0, 255/255.0)
cairo_context.stroke
cairo_context.new_path
cairo_context.move_to 200, 260
cairo_context.line_to 270, 270
cairo_context.line_to 250, 290
cairo_context.line_to 220, 290
cairo_context.line_to 200, 280
cairo_context.line_to 180, 270
cairo_context.close_path
cairo_context.set_source_rgb(0, 255/255.0, 0)
cairo_context.fill
cairo_context.new_path
cairo_context.move_to 200, 260
cairo_context.line_to 270, 270
cairo_context.line_to 250, 290
cairo_context.line_to 220, 290
cairo_context.line_to 200, 280
cairo_context.line_to 180, 270
cairo_context.close_path
cairo_context.set_source_rgb(0, 0, 255/255.0)
cairo_context.stroke
cairo_context.new_path
cairo_context.move_to 200, 260
cairo_context.move_to 270, 320
cairo_context.line_to 250, 340
cairo_context.line_to 220, 340
cairo_context.line_to 200, 330
cairo_context.line_to 180, 320
cairo_context.set_source_rgb(0, 0, 255/255.0)
cairo_context.stroke
end
}
}.show
samples/elaborate/widget_gallery.rb
| Linux | Mac | Windows |
|---|---|---|
     |      |      |
Run (via installed gem):
ruby -r glimmer-dsl-gtk -e "require 'samples/elaborate/widget_gallery'"
Run (via locally cloned project):
ruby -r ./lib/glimmer-dsl-gtk.rb samples/elaborate/widget_gallery.rb
Code:
require 'glimmer-dsl-gtk'
include Glimmer
application('org.glimmer.hello-application') {
on(:activate) do |app|
application_window(app) { |aw|
title 'Widget Gallery'
notebook { |n|
f1 = frame {
alignment(1, 1, 1, 1) {
padding 15, 15, 15, 15
box(:vertical) {
spacing 10
label('Entry')
entry {
text 'Enter One Line of Text'
}
label('Search Entry')
search_entry {
text 'Enter Search Term'
}
label('Spin Button')
spin_button(1, 100, 1) {
}
label('Combo Box Text')
cb = combo_box_text {
}
3.times { |n| cb.append_text "Option #{n + 1}" }
}
}
}
n.set_tab_label_text(f1.gtk, 'Text')
f2 = frame {
alignment(1, 1, 1, 1) {
padding 15, 15, 15, 15
box(:vertical) {
spacing 10
label('Button')
button(label: 'Push Me') {
on(:clicked) do
message_dialog(parent: aw) { |md|
title 'Information'
text 'You clicked the button'
on(:response) do
md.destroy
end
}.show
end
}
label('Radio Button')
box(:horizontal) {
rb = radio_button(label: 'One')
radio_button(label: 'Two', member: rb)
radio_button(label: 'Three', member: rb)
}
label('Check Button')
box(:horizontal) {
check_button('One')
check_button('Two')
check_button('Three')
}
}
}
}
n.set_tab_label_text(f2.gtk, 'Button')
f3 = frame {
alignment(1, 1, 1, 1) {
padding 15, 15, 15, 15
box(:vertical) {
spacing 10
label('Horizontal Scale')
scale(:horizontal, 1, 100, 1) {
visible true
}
label('Vertical Scale')
scale(:vertical, 1, 100, 1) {
visible true
height_request 200
}
}
}
}
n.set_tab_label_text(f3.gtk, 'Selection')
f4 = frame {
alignment(1, 1, 1, 1) {
padding 15, 15, 15, 15
box(:vertical) {
spacing 10
label('Expander')
3.times do |n|
expander {
label "Item #{n + 1}"
label("Item #{n + 1} Expanded") {
}
}
end
}
}
}
n.set_tab_label_text(f4.gtk, 'Organizer')
f5 = frame {
alignment(1, 1, 1, 1) {
padding 15, 15, 15, 15
box(:vertical) {
spacing 10
label('Progress Bar')
pb = progress_bar {
text 'Progress Bar'
}
Thread.new do
101.times.cycle do |n|
pb.fraction = n / 100.0
sleep(0.1) # yields back to main GUI thread
end
end
label('Spinner')
spinner {
active true
}
}
}
}
n.set_tab_label_text(f5.gtk, 'Progress')
}
}.present
end
}.run
| Linux | Mac | Windows |
|---|---|---|
 |  |  |
Run (via installed gem):
ruby -r glimmer-dsl-gtk -e "require 'samples/elaborate/tetris'"
Run (via locally cloned project):
ruby -r ./lib/glimmer-dsl-gtk.rb samples/elaborate/tetris.rb
Code:
require 'glimmer-dsl-gtk'
require_relative 'tetris/model/game'
class Tetris
include Glimmer
BLOCK_SIZE = 25
BEVEL_CONSTANT = 20
COLOR_GRAY = [192, 192, 192]
def initialize
@game = Model::Game.new
end
def launch
create_gui
register_observers
@game.start!
@main_window.show
end
def create_gui
@main_window = window {
title 'Glimmer Tetris'
default_size Model::Game::PLAYFIELD_WIDTH * BLOCK_SIZE, Model::Game::PLAYFIELD_HEIGHT * BLOCK_SIZE # + 98
box(:vertical) {
tetris_menu_bar
box(:horizontal) {
@playfield_blocks = playfield(playfield_width: @game.playfield_width, playfield_height: @game.playfield_height, block_size: BLOCK_SIZE)
score_board
}
}
on(:key_press_event) do |widget, key_event|
case key_event.keyval
when 65364 # down arrow
@game.down!
when 32 # space
@game.down!(instant: true)
when 65362 # up arrow
case @game.up_arrow_action
when :instant_down
@game.down!(instant: true)
when :rotate_right
@game.rotate!(:right)
when :rotate_left
@game.rotate!(:left)
end
when 65361 # left arrow
@game.left!
when 65363 # right arrow
@game.right!
when 65506 # right shift
@game.rotate!(:right)
when 65505 # left shift
@game.rotate!(:left)
else
# Do Nothing
end
end
}
end
def register_observers
observe(@game, :game_over) do |game_over|
if game_over
show_game_over_dialog
else
start_moving_tetrominos_down
end
end
@game.playfield_height.times do |row|
@game.playfield_width.times do |column|
observe(@game.playfield[row][column], :color) do |new_color|
color = new_color
block = @playfield_blocks[row][column]
block[:background_square].fill = color
block[:top_bevel_edge].fill = [color[0] + 4*BEVEL_CONSTANT, color[1] + 4*BEVEL_CONSTANT, color[2] + 4*BEVEL_CONSTANT]
block[:right_bevel_edge].fill = [color[0] - BEVEL_CONSTANT, color[1] - BEVEL_CONSTANT, color[2] - BEVEL_CONSTANT]
block[:bottom_bevel_edge].fill = [color[0] - BEVEL_CONSTANT, color[1] - BEVEL_CONSTANT, color[2] - BEVEL_CONSTANT]
block[:left_bevel_edge].fill = [color[0] - BEVEL_CONSTANT, color[1] - BEVEL_CONSTANT, color[2] - BEVEL_CONSTANT]
block[:border_square].stroke = new_color == Model::Block::COLOR_CLEAR ? COLOR_GRAY : color
block[:drawing_area].queue_draw
false
end
end
end
Model::Game::PREVIEW_PLAYFIELD_HEIGHT.times do |row|
Model::Game::PREVIEW_PLAYFIELD_WIDTH.times do |column|
preview_updater = proc do
block = @preview_playfield_blocks[row][column]
if @game.show_preview_tetromino?
new_color = @game.preview_playfield[row][column].color
block[:background_square].fill = new_color
block[:top_bevel_edge].fill = [new_color[0] + 4*BEVEL_CONSTANT, new_color[1] + 4*BEVEL_CONSTANT, new_color[2] + 4*BEVEL_CONSTANT]
block[:right_bevel_edge].fill = [new_color[0] - BEVEL_CONSTANT, new_color[1] - BEVEL_CONSTANT, new_color[2] - BEVEL_CONSTANT]
block[:bottom_bevel_edge].fill = [new_color[0] - BEVEL_CONSTANT, new_color[1] - BEVEL_CONSTANT, new_color[2] - BEVEL_CONSTANT]
block[:left_bevel_edge].fill = [new_color[0] - BEVEL_CONSTANT, new_color[1] - BEVEL_CONSTANT, new_color[2] - BEVEL_CONSTANT]
block[:border_square].stroke = new_color == Model::Block::COLOR_CLEAR ? COLOR_GRAY : new_color
@next_label.text = 'Next'
else
transparent_color = [0, 0, 0, 0]
block[:background_square].fill = transparent_color
block[:top_bevel_edge].fill = transparent_color
block[:right_bevel_edge].fill = transparent_color
block[:bottom_bevel_edge].fill = transparent_color
block[:left_bevel_edge].fill = transparent_color
block[:border_square].stroke = transparent_color
@next_label.text = ''
end
block[:drawing_area].queue_draw
end
observe(@game.preview_playfield[row][column], :color, &preview_updater)
observe(@game, :show_preview_tetromino, &preview_updater)
end
end
observe(@game, :score) do |new_score|
@score_label.text = new_score.to_s
end
observe(@game, :lines) do |new_lines|
@lines_label.text = new_lines.to_s
end
observe(@game, :level) do |new_level|
@level_label.text = new_level.to_s
end
end
def tetris_menu_bar
menu_bar {
menu_item(label: 'Game') { |mi|
m = menu {
check_menu_item(label: 'Pause') {
on(:activate) do
@game.paused = !@game.paused?
end
}
menu_item(label: 'Restart') {
on(:activate) do
@game.restart!
end
}
separator_menu_item
menu_item(label: 'Exit') {
on(:activate) do
@main_window.close
end
}
}
mi.submenu = m.gtk
}
menu_item(label: 'View') { |mi|
m = menu {
check_menu_item(label: 'Show Next Block Preview') {
active @game.show_preview_tetromino?
on(:activate) do
@game.show_preview_tetromino = !@game.show_preview_tetromino?
end
}
separator_menu_item
menu_item(label: 'Show High Scores') {
on(:activate) do
show_high_score_dialog
end
}
menu_item(label: 'Clear High Scores') {
on(:activate) do
@game.clear_high_scores!
end
}
}
mi.submenu = m.gtk
}
menu_item(label: 'Speed') { |mi|
m = menu {
rmi = radio_menu_item(nil, Model::Game::SPEEDS.first.to_s.capitalize) {
active true
on(:activate) do
@game.send("speed_#{Model::Game::SPEEDS.first}=", true)
end
}
Model::Game::SPEEDS.drop(1).each do |speed|
radio_menu_item(rmi.group, speed.to_s.capitalize) {
on(:activate) do
@game.send("speed_#{speed}=", true)
end
}
end
}
mi.submenu = m.gtk
}
menu_item(label: 'Options') { |mi|
m = menu {
rmi = radio_menu_item(nil, 'Instant Down on Up') {
on(:activate) do
@game.instant_down_on_up!
end
}
default_rmi = radio_menu_item(rmi.group, 'Rotate Right on Up') {
on(:activate) do
@game.rotate_right_on_up!
end
}
default_rmi.activate
radio_menu_item(rmi.group, 'Rotate Left on Up') {
on(:activate) do
@game.rotate_left_on_up!
end
}
}
mi.submenu = m.gtk
}
menu_item(label: 'Help') { |mi|
m = menu {
menu_item(label: 'About') {
on(:activate) do
show_about_dialog
end
}
}
mi.submenu = m.gtk
}
}
end
def score_board
box(:vertical) {
label
@next_label = label('Next')
@preview_playfield_blocks = playfield(playfield_width: Model::Game::PREVIEW_PLAYFIELD_WIDTH, playfield_height: Model::Game::PREVIEW_PLAYFIELD_HEIGHT, block_size: BLOCK_SIZE)
label
label('Score')
@score_label = label
label
label('Lines')
@lines_label = label
label
label('Level')
@level_label = label
label
}
end
def playfield(playfield_width: , playfield_height: , block_size: , &extra_content)
blocks = []
box(:vertical) {
playfield_height.times.map do |row|
blocks << []
box(:horizontal) {
playfield_width.times.map do |column|
blocks.last << block(row: row, column: column, block_size: block_size)
end
}
end
extra_content&.call
}
blocks
end
def block(row: , column: , block_size: , &extra_content)
block = {}
bevel_pixel_size = 0.16 * block_size.to_f
color = Model::Block::COLOR_CLEAR
block[:drawing_area] = drawing_area {
size_request block_size, block_size
block[:background_square] = square(0, 0, block_size) {
fill *color
}
block[:top_bevel_edge] = polygon(0, 0, block_size, 0, block_size - bevel_pixel_size, bevel_pixel_size, bevel_pixel_size, bevel_pixel_size) {
fill color[0] + 4*BEVEL_CONSTANT, color[1] + 4*BEVEL_CONSTANT, color[2] + 4*BEVEL_CONSTANT
}
block[:right_bevel_edge] = polygon(block_size, 0, block_size - bevel_pixel_size, bevel_pixel_size, block_size - bevel_pixel_size, block_size - bevel_pixel_size, block_size, block_size) {
fill color[0] - BEVEL_CONSTANT, color[1] - BEVEL_CONSTANT, color[2] - BEVEL_CONSTANT
}
block[:bottom_bevel_edge] = polygon(block_size, block_size, 0, block_size, bevel_pixel_size, block_size - bevel_pixel_size, block_size - bevel_pixel_size, block_size - bevel_pixel_size) {
fill color[0] - BEVEL_CONSTANT, color[1] - BEVEL_CONSTANT, color[2] - BEVEL_CONSTANT
}
block[:left_bevel_edge] = polygon(0, 0, 0, block_size, bevel_pixel_size, block_size - bevel_pixel_size, bevel_pixel_size, bevel_pixel_size) {
fill color[0] - BEVEL_CONSTANT, color[1] - BEVEL_CONSTANT, color[2] - BEVEL_CONSTANT
}
block[:border_square] = square(0, 0, block_size) {
stroke *COLOR_GRAY
}
extra_content&.call
}
block
end
def start_moving_tetrominos_down
unless @tetrominos_start_moving_down
@tetrominos_start_moving_down = true
tetromino_move = proc do
@game.down! if !@game.game_over? && !@game.paused?
GLib::Timeout.add(@game.delay*1000, &tetromino_move)
false # do not repeat
end
GLib::Timeout.add(@game.delay*1000, &tetromino_move)
end
end
def show_game_over_dialog
@game.paused = true
message_dialog(parent: @main_window) { |md|
title 'Game Over!'
text "Score: #{@game.high_scores.first.score}\nLines: #{@game.high_scores.first.lines}\nLevel: #{@game.high_scores.first.level}"
on(:response) do
@game.restart!
md.destroy
end
}.show
end
def show_high_score_dialog
@game.paused = true
if @game.high_scores.empty?
high_scores_string = "No games have been scored yet."
else
high_scores_string = @game.high_scores.map do |high_score|
"#{high_score.name} | Score: #{high_score.score} | Lines: #{high_score.lines} | Level: #{high_score.level}"
end.join("\n")
end
message_dialog(parent: @main_window) { |md|
title 'High Scores'
text high_scores_string
on(:response) do
@game.paused = false
md.destroy
end
}.show
end
def show_about_dialog
message_dialog(parent: @main_window) { |md|
title 'About'
text "Glimmer Tetris\n\nGlimmer DSL for GTK\n\nElaborate Sample\n\nCopyright (c) 2021-2022 Andy Maleh"
on(:response) do
md.destroy
end
}.show
end
end
Tetris.new.launch
If you encounter issues that are not reported, discover missing features that are not mentioned in TODO.md, or think up better ways to use GTK than what is possible with Glimmer DSL for GTK, you may submit an issue or pull request on GitHub. In the meantime while waiting for a fix, you may try older gem versions of Glimmer DSL for GTK in case you find one that does not have the issue and actually works.
If you need live help, try to
These features have been planned or suggested. You might see them in a future version of Glimmer DSL for GTK. You are welcome to contribute more feature suggestions.
Click here to view contributor commits.
Copyright (c) 2021 Andy Maleh.
--
Built for Glimmer (DSL Framework).
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