Class: Cosmos::ComboboxChooser

Inherits:
Qt::Widget show all
Defined in:
lib/cosmos/gui/choosers/combobox_chooser.rb

Overview

This class implements the ComboboxChooser

Constant Summary collapse

COMBOBOX_BUTTON_WIDTH =

Width of the button in the combobox

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Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(parent, label_text, items, allow_user_entry: false, compact_combobox: true, color_chooser: false) ⇒ ComboboxChooser

Returns a new instance of ComboboxChooser.



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# File 'lib/cosmos/gui/choosers/combobox_chooser.rb', line 24

def initialize(
  parent, label_text, items, # required
  allow_user_entry: false, compact_combobox: true, color_chooser: false
)
  super(parent)
  layout = Qt::HBoxLayout.new(self)
  layout.setContentsMargins(0,0,0,0)
  @combo_label = Qt::Label.new(label_text)
  @combo_label.setSizePolicy(Qt::SizePolicy::Fixed, Qt::SizePolicy::Fixed) unless compact_combobox
  layout.addWidget(@combo_label)
  @combo_value = Qt::ComboBox.new
  @combo_value.setEditable(allow_user_entry)
  string_items = items.map {|item| item.to_s}
  @combo_value.addItems(string_items)
  @color_chooser = color_chooser
  set_colors(string_items) if @color_chooser
  @combo_value.connect(SIGNAL('currentIndexChanged(int)')) {|index| handle_combobox_sel_command(index) }
  if items.length < 20
    @combo_value.setMaxVisibleItems(items.length)
  else
    @combo_value.setMaxVisibleItems(20)
  end
  layout.addStretch if compact_combobox
  layout.addWidget(@combo_value)

  setLayout(layout)
  @sel_command_callback = nil
end

Instance Attribute Details

#sel_command_callback ⇒ Object

Optional callback for when the combobox value changes



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# File 'lib/cosmos/gui/choosers/combobox_chooser.rb', line 22

def sel_command_callback
  @sel_command_callback
end

Instance Method Details

#float ⇒ Object

Returns the selected item as a float



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# File 'lib/cosmos/gui/choosers/combobox_chooser.rb', line 85

def float
  @combo_value.currentText.to_f if @combo_value.currentText
end

#handle_combobox_sel_command(index) ⇒ Object

Supports a callback on item changing



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# File 'lib/cosmos/gui/choosers/combobox_chooser.rb', line 72

def handle_combobox_sel_command(index)
  if index >= 0
    @sel_command_callback.call(string()) if @sel_command_callback
  end
  0
end

#integer ⇒ Object

Returns the selected item as an integer



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# File 'lib/cosmos/gui/choosers/combobox_chooser.rb', line 80

def integer
  Integer(@combo_value.currentText)
end

#set_current(string) ⇒ Object 



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# File 'lib/cosmos/gui/choosers/combobox_chooser.rb', line 67

def set_current(string)
  @combo_value.setCurrentText(string.to_s)
end

#string ⇒ Object

Returns the selected item as a string



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# File 'lib/cosmos/gui/choosers/combobox_chooser.rb', line 90

def string
  @combo_value.currentText
end

#symbol ⇒ Object

Returns the selected item as a symbol



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# File 'lib/cosmos/gui/choosers/combobox_chooser.rb', line 95

def symbol
  @combo_value.currentText.intern if @combo_value.currentText
end

#update_items(items, include_blank = true) ⇒ Object

Changes the items in the combobox and resizes it



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# File 'lib/cosmos/gui/choosers/combobox_chooser.rb', line 54

def update_items(items, include_blank = true)
  @combo_value.clearItems
  @combo_value.addItem(' ') if include_blank
  string_items = items.map {|item| item.to_s}
  @combo_value.addItems(string_items)
  set_colors(string_items) if @color_chooser
  if items.length < 20
    @combo_value.setMaxVisibleItems(items.length)
  else
    @combo_value.setMaxVisibleItems(20)
  end
end