Class: Cosmos::FloatChooser

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

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(parent, label_text, initial_value, minimum_value = nil, maximum_value = nil, field_width = 20, fill = false) ⇒ FloatChooser

Returns a new instance of FloatChooser.



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# File 'lib/cosmos/gui/choosers/float_chooser.rb', line 20

def initialize(
  parent, label_text, initial_value,
  minimum_value = nil, maximum_value = nil, field_width = 20, fill = false
)
  super(parent)
  @minimum_value = minimum_value
  @maximum_value = maximum_value
  @field_width   = field_width

  layout = Qt::HBoxLayout.new(self)
  layout.setContentsMargins(0,0,0,0)

  @float_label = Qt::Label.new(label_text)
  @float_label.setSizePolicy(Qt::SizePolicy::Fixed, Qt::SizePolicy::Fixed) if fill
  layout.addWidget(@float_label)
  layout.addStretch unless fill
  @float_value = Qt::LineEdit.new(initial_value.to_s)
  @float_value.setMinimumWidth(field_width)
  if minimum_value or maximum_value
    validator = Qt::DoubleValidator.new(@float_value)
    validator.setBottom(minimum_value) if minimum_value
    validator.setTop(maximum_value) if maximum_value
    validator.setNotation(Qt::DoubleValidator::StandardNotation)
    @float_value.setValidator(validator)
  end
  @callback_in_progress = false
  @float_value.connect(SIGNAL('editingFinished()')) do
    unless @callback_in_progress # Prevent double fire on loss of focus
      begin
        @callback_in_progress = true
        @sel_command_callback.call(string(), value()) if @sel_command_callback
      ensure
        @callback_in_progress = false
      end
    end
  end
  layout.addWidget(@float_value)
  setLayout(layout)

  @sel_command_callback = nil
end

Instance Attribute Details

#sel_command_callback ⇒ Object

Callback for a new value entered into the text field



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# File 'lib/cosmos/gui/choosers/float_chooser.rb', line 18

def sel_command_callback
  @sel_command_callback
end

Instance Method Details

#string ⇒ Object

Returns the value as a string



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# File 'lib/cosmos/gui/choosers/float_chooser.rb', line 63

def string
  @float_value.text
end

#value ⇒ Object

Returns the value as a float



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# File 'lib/cosmos/gui/choosers/float_chooser.rb', line 68

def value
  float_value = @float_value.text.to_f
  float_value = @minimum_value if @minimum_value and float_value < @minimum_value
  float_value = @maximum_value if @maximum_value and float_value > @maximum_value
  float_value
end

#value=(new_value) ⇒ Object

Sets the value of the text field



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# File 'lib/cosmos/gui/choosers/float_chooser.rb', line 76

def value=(new_value)
  @float_value.setText(new_value.to_s)
end