Class: Cosmos::FullTextSearchLineEdit

Inherits:
Qt::LineEdit show all
Defined in:
lib/cosmos/gui/widgets/full_text_search_line_edit.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods inherited from Qt::LineEdit

#setColors, #text=

Constructor Details

#initialize(parent) ⇒ FullTextSearchLineEdit

Returns a new instance of FullTextSearchLineEdit.



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# File 'lib/cosmos/gui/widgets/full_text_search_line_edit.rb', line 17

def initialize(parent)
  super(parent)
  @listView = Qt::ListWidget.new(parent)
  @listView.setWindowFlags(0xc | 0x1) # Qt::ToolTip
  @completion_list = []
  @filtered_list = []
  @callback = nil
  connect(self, SIGNAL("textChanged(const QString &)")) do |text|
    handleTextChanged()
  end
  connect(@listView, SIGNAL("itemClicked(QListWidgetItem*)")) do |item|
    text = item.text
    setText(text)
    @callback.call(text) if @callback
    @listView.hide
  end
end

Instance Attribute Details

#callback ⇒ Object

Returns the value of attribute callback.



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# File 'lib/cosmos/gui/widgets/full_text_search_line_edit.rb', line 15

def callback
  @callback
end

#completion_list ⇒ Object

Returns the value of attribute completion_list.



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# File 'lib/cosmos/gui/widgets/full_text_search_line_edit.rb', line 14

def completion_list
  @completion_list
end

Instance Method Details

#focusOutEvent(e) ⇒ Object 



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# File 'lib/cosmos/gui/widgets/full_text_search_line_edit.rb', line 35

def focusOutEvent(e)
  Qt.execute_in_main_thread(false, 0.001, true) do
    unless @listView.hasFocus
      @listView.hide
    end
  end
  super(e)
end

#handleTextChanged ⇒ Object 



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# File 'lib/cosmos/gui/widgets/full_text_search_line_edit.rb', line 117

def handleTextChanged
  text = self.text
  if text.empty?
    @listView.hide
    return
  end

  updateFilteredList(text)

  if @filtered_list.length == 0 or (@filtered_list.length ==1 and text == @filtered_list[0])
    @listView.hide
    return
  end

  maxVisibleRows = 10
  p = Qt::Point.new(0, height())
  x = mapToGlobal(p).x
  y = mapToGlobal(p).y + 1
  p.dispose
  @listView.move(x, y)
  @listView.setMinimumWidth(width())
  @listView.setMaximumWidth(width())
  if @filtered_list.length > maxVisibleRows
    @listView.setFixedHeight(maxVisibleRows * (@listView.fontMetrics.height + 2) + 2)
  else
    @listView.setFixedHeight((@filtered_list.length + 1) * (@listView.fontMetrics.height + 2) + 2)
  end

  @listView.show
  @listView.raise
end

#keyPressEvent(e) ⇒ Object 



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# File 'lib/cosmos/gui/widgets/full_text_search_line_edit.rb', line 44

def keyPressEvent(e)
  key = e.key
  if !@listView.isHidden
    count = @filtered_list.length
    row = @listView.currentRow

    # Move through list
    if (key == Qt::Key_Down || key == Qt::Key_Up)
      case(key)
      when Qt::Key_Down
        row += 1
        row = 0 if row >= count
      when Qt::Key_Up
        row -= 1
        row = count - 1 if row < 0
      end

      if @listView.isEnabled
        @listView.setCurrentRow(row)
      end

    # Accept choice
    elsif ((Qt::Key_Enter == key || Qt::Key_Return == key) && @listView.isEnabled)
      if row >= 0
        text = @listView.item(row).text
        setText(text)
        @listView.hide
        handleTextChanged()
        @callback.call(text) if @callback
        @listView.hide
      else
        super(e)
      end

    # Cancel
    elsif Qt::Key_Escape == key
      @listView.hide

    # More data entry
    else
      @listView.hide
      super(e)
    end

  else
    # Up/down potentially after cancel
    if (key == Qt::Key_Down || key == Qt::Key_Up)
      handleTextChanged()

      if !@listView.isHidden
        case(key)
        when Qt::Key_Down
          row = 0
        when Qt::Key_Up
          row = @filtered_list.length - 1
        end

        if @listView.isEnabled
          @listView.setCurrentRow(row)
        end
      end

    # More data entry
    else
      if ((Qt::Key_Enter == key || Qt::Key_Return == key))
        @callback.call(self.text) if @callback
        @listView.hide
      end
      super(e)
    end
  end
end

#updateFilteredList(text) ⇒ Object 



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# File 'lib/cosmos/gui/widgets/full_text_search_line_edit.rb', line 149

def updateFilteredList(text)
  @filtered_list = []
  regex = Regexp.new(Regexp.quote(text), Regexp::IGNORECASE)
  @completion_list.each do |string|
    @filtered_list << string if string =~ regex
  end
  @listView.clear
  @listView.addItems(@filtered_list)
  @listView.setCurrentRow(0) if @filtered_list.length > 0
end