Top Level Namespace

Includes:
LibuiParadise::BaseModule

Defined Under Namespace

Modules: Fiddle, LibuiParadise Classes: FFTStream, FontExample

Constant Summary collapse

UI = 
LibUI
VERSION = 
'0.0.1'.freeze
TITLE =

Michael Ende (1929-1995) The Neverending Story is a fantasy novel by German writer Michael Ende, The English version, translated by Ralph Manheim, was published in 1983.

'Michael Ende'
MAIN_WINDOW =

Main Window

create_window('Try for automatic button press event after a delay', :default, HEIGHT, 1)
HEIGHT =
#

HEIGHT

#
120
X_OFF_LEFT = 
20
Y_OFF_TOP = 
20
X_OFF_RIGHT = 
20
Y_OFF_BOTTOM = 
20
POINT_RADIUS = 
5
BLUE =
#

BLUE

#
0x1E90FF
WIDTH =
#

WIDTH

#
1000
N_TIMES = 
10
REMOTE_URL =
#
'https://www.ghibli.jp/gallery/thumb-redturtle%03d.png'
IMAGES =
#

IMAGES

#
[]
FONT_FAMILY_TO_USE =
#

FONT_FAMILY_TO_USE

#
'Georgia'
USE_THIS_FONT =
#

USE_THIS_FONT

#
'Hack'

Instance Method Summary collapse

Methods included from LibuiParadise::BaseModule

#abort_on_exception, #append_this_array_to_that_combobox, #area, #assumed_height?, #assumed_width?, #bold_button, #bold_label, #bold_text_left_aligned, #button, #chdir, #checkbox, #checked_checkbox, #close_properly, #colour_button, #colour_to_rgb, #combobox, #commandline_arguments?, #connect_skeleton, #copy, #copy_file, #create_directory, #create_grid, #create_skeleton_then_connect_skeleton, #create_table, #create_the_skeleton, #current_widget_pointer_type?, #delete_file, #do_quit, #editable_combobox, #entry, #error_msg, #esystem, #exit_from, #fancy_text, #font, #font_button, #free_table_model, #gtk3?, #hbox, #height?, #horizontal_separator, #image, #is_on_roebe?, #is_on_windows?, #label, #last_pointer?, #left_arrow?, #main_hash?, #main_then_quit, #menu, #message_box_error, #multiline_entry, #new_brush, #non_wrapping_multiline_entry, #parse_this_file_into_a_table, #password_entry, #quit_button, #radio_buttons, #register_this_fiddle_pointer_widget, #reset, #reset_the_internal_hash, #return_button_for_opening_a_local_file, #return_default_window, #return_pwd, #return_the_resolution_using_xrandr, #run, #run_main, #scrolling_area, #search_entry, #selected?, #set_commandline_arguments, #set_height, #set_main_window, #set_title, #set_width, #set_window, #sfancy, #sfile, #slider, #spinbox, #tab, #table, #text?, #text_layout, #title?, #title_width_height, #title_width_height_font, #try_to_parse_this_config_file, #try_to_use_this_font, #two_elements_hbox, #ui_draw_text_layout_params, #ui_font_descriptor, #ui_margined_main_window, #ui_msg_box, #ui_open_file, #ui_padded_grid, #ui_padded_hbox, #ui_padded_vbox, #ui_sync_connect, #ui_table_params_malloc, #ui_text_then_entry, #use_gtk3?, #use_gtk?, #use_libui?, #vbox, #vertical_separator, #width?, #window, #window?, #without_trailing_comment, #wrapper_new_progress_bar

Instance Method Details

#append_with_attribute(attr_str, what, attr1, attr2) ⇒ Object

#

append_with_attribute

#


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# File 'lib/libui_paradise/examples/simple/003_fancy_text_example.rb', line 38

def append_with_attribute(
    widget,
    use_this_text,
    attr1,
    attr2 # This is rarely needed.
  )
  start_pos = LibUI.attributed_string_len(widget)
  end_pos   = start_pos + what.length
  LibUI.attributed_string_append_unattributed(widget, use_this_text)
  LibUI.attributed_string_set_attribute(widget, attr1, start_pos, end_pos)
  LibUI.attributed_string_set_attribute(widget, attr2, start_pos, end_pos) if attr2
end

#callback_for_the_slider ⇒ Object

#

callback_for_the_slider

#


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# File 'lib/libui_paradise/examples/complex/007_slider_example.rb', line 16

def callback_for_the_slider
  proc { |pointer|
    puts "New Slider value: #{UI.slider_value(pointer)}"
  }
end

#construct_graph(datapoints, width, height, should_extend) ⇒ Object

construct_graph



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# File 'lib/libui_paradise/examples/simple/002_histogram_example.rb', line 63

def construct_graph(datapoints, width, height, should_extend)
  locations = point_locations(datapoints, width, height)
  path = LibUI.draw_new_path(0) # winding
  first_location = locations[0] # x and y
  UI.draw_path_new_figure(path, first_location[0], first_location[1])
  locations.each { |loc|
    UI.draw_path_line_to(path, loc[0], loc[1])
  }

  if should_extend
    LibUI.draw_path_line_to(path, width, height)
    LibUI.draw_path_line_to(path, 0, height)
    LibUI.draw_path_close_figure(path)
  end

  LibUI.draw_path_end(path)

  return path
end

#do_call_this_method ⇒ Object 



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# File 'lib/libui_paradise/experimental/dsl.rb', line 7

def do_call_this_method
  e 'Hello World!'
end

#draw_event(adp, attr_str, font_button, alignment) ⇒ Object

#

draw_event

#


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# File 'lib/libui_paradise/examples/simple/003_fancy_text_example.rb', line 157

def draw_event(adp, attr_str, font_button, alignment)
  area_draw_params = UI::FFI::AreaDrawParams.new(adp)

  default_font = UI::FFI::FontDescriptor.malloc
  default_font.to_ptr.free = Fiddle::RUBY_FREE

  params = UI::FFI::DrawTextLayoutParams.malloc
  params.to_ptr.free = Fiddle::RUBY_FREE

  params.String = attr_str
  UI.font_button_font(font_button, default_font)
  params.DefaultFont = default_font
  params.Width = area_draw_params.AreaWidth
  params.Align = UI.combobox_selected(alignment)
  text_layout = UI.draw_new_text_layout(params)
  LibUI.draw_text(area_draw_params.Context, text_layout, 0, 0)
  LibUI.draw_free_text_layout(text_layout)
  LibUI.free_font_button_font(default_font)
end

#graph_size(area_width, area_height) ⇒ Object

#

graph_size

#


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# File 'lib/libui_paradise/examples/simple/002_histogram_example.rb', line 39

def graph_size(area_width, area_height)
  graph_width = area_width - X_OFF_LEFT - X_OFF_RIGHT
  graph_height = area_height - Y_OFF_TOP - Y_OFF_BOTTOM
  [graph_width, graph_height]
end

#make_attribute_string ⇒ Object

#

make_attribute_string

#


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# File 'lib/libui_paradise/examples/simple/003_fancy_text_example.rb', line 56

def make_attribute_string
  attr_str = LibUI.new_attributed_string(
    "Drawing strings with libui is done with the "\
    "uiAttributedString and uiDrawTextLayout objects.\n" \
     'uiAttributedString lets you have a variety of attributes: '
  )

  attr1 = LibUI.new_family_attribute(USE_THIS_FONT)
  append_with_attribute(attr_str, 'font family', attr1, nil)
  LibUI.attributed_string_append_unattributed(attr_str, ', ')

  # ========================================================================= #
  # === Use a bigger font next
  #
  # The bigger font will be use for the String "font size".
  # ========================================================================= #
  bigger_font = UI.new_size_attribute(62)
  append_with_attribute(attr_str, 'font size', bigger_font, nil)

  LibUI.attributed_string_append_unattributed(attr_str, ', ') # Then append ','.

  # ========================================================================= #
  # === Make bold text next                                        (bold tag)
  # ========================================================================= #
  attr1 = LibUI.new_weight_attribute(LibUI::TextWeightBold)
  append_with_attribute(attr_str, 'font weight', attr1, nil)

  LibUI.attributed_string_append_unattributed(attr_str, ', ')

  attr1 = LibUI.new_italic_attribute(LibUI::TextItalicItalic)
  append_with_attribute(attr_str, 'font italicness', attr1, nil)
  UI.attributed_string_append_unattributed(attr_str, ', ')

  attr1 = LibUI.new_stretch_attribute(LibUI::TextStretchCondensed)
  append_with_attribute(attr_str, 'font stretch', attr1, nil)
  UI.attributed_string_append_unattributed(attr_str, ', ')

  # ========================================================================= #
  # Influence the text-colour via RGB values.
  # ========================================================================= #
  attr1 = LibUI.new_color_attribute(0.75, 0.25, 0.5, 0.75)
  append_with_attribute(attr_str, 'text color', attr1, nil)
  UI.attributed_string_append_unattributed(attr_str, ', ')

  attr1 = LibUI.new_background_attribute(0.5, 0.5, 0.25, 0.5)
  append_with_attribute(attr_str, 'text background color', attr1, nil)
  UI.attributed_string_append_unattributed(attr_str, ', ')

  attr1 = UI.new_underline_attribute(LibUI::UnderlineSingle)
  append_with_attribute(attr_str, 'underline style', attr1, nil)
  UI.attributed_string_append_unattributed(attr_str, ', ')

  UI.attributed_string_append_unattributed(attr_str, 'and ')
  attr1 = LibUI.new_underline_attribute(LibUI::UnderlineDouble)
  attr2 = LibUI.new_underline_color_attribute(LibUI::UnderlineColorCustom, 1.0, 0.0, 0.5, 1.0)
  append_with_attribute(attr_str, 'underline color', attr1, attr2)
  UI.attributed_string_append_unattributed(attr_str, '. ')

  UI.attributed_string_append_unattributed(attr_str, 'Furthermore, there are attributes allowing for ')
  attr1 = LibUI.new_underline_attribute(LibUI::UnderlineSuggestion)
  attr2 = LibUI.new_underline_color_attribute(LibUI::UnderlineColorSpelling, 0, 0, 0, 0)
  append_with_attribute(attr_str, 'special underlines for indicating spelling errors', attr1, attr2)
  LibUI.attributed_string_append_unattributed(attr_str, ' (and other types of errors) ')

  LibUI.attributed_string_append_unattributed(attr_str,
                                           'and control over OpenType features such as ligatures (for instance, ')
  otf = LibUI.new_open_type_features
  UI.open_type_features_add(otf, 'l', 'i', 'g', 'a', 0)
  attr1 = LibUI.new_features_attribute(otf)
  append_with_attribute(attr_str, 'afford', attr1, nil)
  UI.attributed_string_append_unattributed(attr_str, ' vs. ')
  UI.open_type_features_add(otf, 'l', 'i', 'g', 'a', 1)
  attr1 = LibUI.new_features_attribute(otf)
  append_with_attribute(attr_str, 'afford', attr1, nil)
  UI.free_open_type_features(otf)
  UI.attributed_string_append_unattributed(attr_str, ").\n")

  UI.attributed_string_append_unattributed(attr_str,
                                           'Use the controls '\
                                           'opposite to the text '\
                                           'to control properties of the text.')
  attr_str # And return the String here.
end

#on_combobox_selected(area) ⇒ Object

#

on_combobox_selected

#


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# File 'lib/libui_paradise/examples/simple/003_fancy_text_example.rb', line 150

def on_combobox_selected(i)
  UI.area_queue_redraw_all(i)
end

#on_font_changed(area) ⇒ Object

#

on_font_changed

#


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# File 'lib/libui_paradise/examples/simple/003_fancy_text_example.rb', line 143

def on_font_changed(i)
  UI.area_queue_redraw_all(i)
end

#point_locations(datapoints, width, height) ⇒ Object 



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# File 'lib/libui_paradise/examples/simple/002_histogram_example.rb', line 48

def point_locations(datapoints, width, height)
  xincr = width / 9.0 # 10 - 1 to make the last point be at the end
  yincr = height / 100.0

  data = []
  datapoints.each_with_index do |dp, i|
    val = 100 - UI.spinbox_value(dp)
    data << [xincr * i, yincr * val]
    i += 1
  end

  data
end

#rbcallback(*args, &block) ⇒ Object

#


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# File 'lib/libui_paradise/examples/complex/026_basic_table_image.rb', line 57

def rbcallback(*args, &block)
  args << [0] if args.size == 1 # Argument types are omitted
  block_caller = Fiddle::Closure::BlockCaller.new(*args, &block)
  @block_callers << block_caller
  block_caller
end

#set_solid_brush(brush, color, alpha) ⇒ Object

set_solid_brush



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# File 'lib/libui_paradise/examples/simple/002_histogram_example.rb', line 180

def set_solid_brush(brush, color, alpha)
  brush.Type = 0 # solid
  brush.R = ((color >> 16) & 0xFF) / 255.0
  brush.G = ((color >> 8) & 0xFF) / 255.0
  brush.B = (color & 0xFF) / 255.0
  brush.A = alpha
  brush
end

#the_button_was_clicked ⇒ Object

#

the_button_was_clicked

#


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# File 'lib/libui_paradise/examples/complex/028_try_for_automatic_button_press_event_after_a_delay.rb', line 41

def the_button_was_clicked
  LibUI.msg_box(MAIN_WINDOW, 'Information', 'You clicked the button!')
end