Class: Wads::TextField

Inherits:
Gosu::TextInput
  • Object
show all
Defined in:
lib/wads/textinput.rb

Constant Summary collapse

INACTIVE_COLOR =

Some constants that define our appearance.

0xcc666666
ACTIVE_COLOR = 
0xcc85929e
SELECTION_COLOR = 
0xcc0000ff
CARET_COLOR = 
0xffffffff
PADDING = 
5

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(x, y, original_text, default_width) ⇒ TextField

Returns a new instance of TextField.



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# File 'lib/wads/textinput.rb', line 17

def initialize(x, y, original_text, default_width)
  super()
  
  @x = x
  @y = y
  @font = WadsConfig.instance.current_theme.font
  @default_width = default_width
  @base_z = 0
  self.text = original_text
  @old_value = self.text
end

Instance Attribute Details

#base_z ⇒ Object

Returns the value of attribute base_z.



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# File 'lib/wads/textinput.rb', line 14

def base_z
  @base_z
end

#old_value ⇒ Object

Returns the value of attribute old_value.



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# File 'lib/wads/textinput.rb', line 15

def old_value
  @old_value
end

#x ⇒ Object (readonly)

Returns the value of attribute x.



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# File 'lib/wads/textinput.rb', line 13

def x
  @x
end

#y ⇒ Object (readonly)

Returns the value of attribute y.



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# File 'lib/wads/textinput.rb', line 13

def y
  @y
end

Instance Method Details

#button_down(id, mouse_x, mouse_y) ⇒ Object 



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# File 'lib/wads/textinput.rb', line 100

def button_down(id, mouse_x, mouse_y)
  if id == Gosu::MsLeft
    move_caret(mouse_x)
  else 
    if @old_value == self.text
      # nothing to do
    else 
      @old_value = self.text
      return WidgetResult.new(false, EVENT_TEXT_INPUT, [self.text])
    end
  end
end

#button_up(id, mouse_x, mouse_y) ⇒ Object 



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# File 'lib/wads/textinput.rb', line 113

def button_up(id, mouse_x, mouse_y)
  # empty base implementation
end

#contains_click(mouse_x, mouse_y) ⇒ Object 



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# File 'lib/wads/textinput.rb', line 83

def contains_click(mouse_x, mouse_y)
  under_point?(mouse_x, mouse_y)
end

#draw ⇒ Object 



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# File 'lib/wads/textinput.rb', line 29

def draw
  # Depending on whether this is the currently selected input or not, change the
  # background's color.
  if WadsConfig.instance.get_window.text_input == self then
    background_color = ACTIVE_COLOR
  else
    background_color = INACTIVE_COLOR
  end
  WadsConfig.instance.get_window.draw_quad(x - PADDING,         y - PADDING,          background_color,
                                           x + width + PADDING, y - PADDING,          background_color,
                                           x - PADDING,         y + height + PADDING, background_color,
                                           x + width + PADDING, y + height + PADDING, background_color, @base_z + 9)
  
  # Calculate the position of the caret and the selection start.
  pos_x = x + @font.text_width(self.text[0...self.caret_pos])
  sel_x = x + @font.text_width(self.text[0...self.selection_start])
  
  # Draw the selection background, if any; if not, sel_x and pos_x will be
  # the same value, making this quad empty.
  WadsConfig.instance.get_window.draw_quad(sel_x, y,          SELECTION_COLOR,
                                           pos_x, y,          SELECTION_COLOR,
                                           sel_x, y + height, SELECTION_COLOR,
                                           pos_x, y + height, SELECTION_COLOR, @base_z + 10)

  # Draw the caret; again, only if this is the currently selected field.
  if WadsConfig.instance.get_window.text_input == self then
    WadsConfig.instance.get_window.draw_line(pos_x, y,          CARET_COLOR,
                                             pos_x, y + height, CARET_COLOR, @base_z + 10)
  end

  # Finally, draw the text itself!
  @font.draw_text(self.text, x, y, @base_z + 10)
end

#handle_key_press(id, mouse_x, mouse_y) ⇒ Object 



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# File 'lib/wads/textinput.rb', line 129

def handle_key_press id, mouse_x, mouse_y
    # empty base implementation
end

#handle_mouse_down(mouse_x, mouse_y) ⇒ Object 



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# File 'lib/wads/textinput.rb', line 121

def handle_mouse_down mouse_x, mouse_y
  # empty base implementation
end

#handle_mouse_up(mouse_x, mouse_y) ⇒ Object 



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# File 'lib/wads/textinput.rb', line 125

def handle_mouse_up mouse_x, mouse_y
    # empty base implementation
end

#handle_update(update_count, mouse_x, mouse_y) ⇒ Object 



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# File 'lib/wads/textinput.rb', line 133

def handle_update update_count, mouse_x, mouse_y
    # empty base implementation
end

#height ⇒ Object 



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# File 'lib/wads/textinput.rb', line 73

def height
  @font.height
end

#move_caret(mouse_x) ⇒ Object

Tries to move the caret to the position specifies by mouse_x



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# File 'lib/wads/textinput.rb', line 88

def move_caret(mouse_x)
  # Test character by character
  1.upto(self.text.length) do |i|
    if mouse_x < x + @font.text_width(text[0...i]) then
      self.caret_pos = self.selection_start = i - 1;
      return
    end
  end
  # Default case: user must have clicked the right edge
  self.caret_pos = self.selection_start = self.text.length
end

#under_point?(mouse_x, mouse_y) ⇒ Boolean

Hit-test for selecting a text field with the mouse.

Returns:

  • (Boolean) 


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# File 'lib/wads/textinput.rb', line 78

def under_point?(mouse_x, mouse_y)
  mouse_x > x - PADDING and mouse_x < x + width + PADDING and
    mouse_y > y - PADDING and mouse_y < y + height + PADDING
end

#update(update_count, mouse_x, mouse_y) ⇒ Object 



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# File 'lib/wads/textinput.rb', line 117

def update(update_count, mouse_x, mouse_y)
  # empty base implementation
end

#width ⇒ Object

This text field grows with the text that’s being entered. (Usually one would use clip_to and scroll around on the text field.)



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# File 'lib/wads/textinput.rb', line 65

def width
  text_width = @font.text_width(self.text)
  if text_width > @default_width
    return text_width 
  end 
  @default_width
end