Class: Core::GUI::Grid

Inherits:
Element show all
Defined in:
lib/gui/grid.rb

Overview

Allows EH::GUI::Elements to be placed into a 32x32 px grid. Elements can be selected and dragged

Instance Attribute Summary collapse

Attributes inherited from Element

#h, #w, #x, #xoff, #y, #yoff, #zoff

Instance Method Summary collapse

Methods inherited from Element

#remove?

Constructor Details

#initialize(x, y, tx, ty, in_classes = []) ⇒ Grid

Returns a new instance of Grid.



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# File 'lib/gui/grid.rb', line 10

def initialize(x, y, tx, ty, in_classes=[])
  super(x, y, tx*32, ty*32)
  @classes = in_classes
  @grid = Array.new(tx) { Array.new(ty) }
  @bg = Core.sprite("gui/container_background")
  @tile = Core.sprite("gui/tile_32")
  @hl = Core.sprite("gui/tile_32_highlight")
  @selected = nil
  @highlight = nil
  @hovered = nil
end

Instance Attribute Details

#selected ⇒ Object (readonly)

Returns the value of attribute selected.



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# File 'lib/gui/grid.rb', line 8

def selected
  @selected
end

Instance Method Details

#add(obj) ⇒ Object

Adds obj to the grid at the next free position Returns the position where obj was inserted



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# File 'lib/gui/grid.rb', line 62

def add(obj)
  if @classes.include?(obj.class)
    x = 0
    @grid.each { |col|
      y = 0
      col.each { |tile|
        if tile == nil
          @grid[x][y] = obj
          return [x, y]
        end
        y += 1
      }
      x += 1
    }
  end
  return [0, 0]
end

#add_at(obj, tx, ty) ⇒ Object

Adds obj at the given position, overwriting any other value Calls add() if the given position is invalid



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# File 'lib/gui/grid.rb', line 82

def add_at(obj, tx, ty)
  if @classes.include?(obj.class)
    @grid[tx][ty] = obj
  end
rescue NoMethodError
  warn("WARNING: Tried to insert element at invalid index (#{obj}, #{tx}|#{ty})")
  add(obj)
end

#clear ⇒ Object 



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# File 'lib/gui/grid.rb', line 112

def clear
  @grid = Array.new(@w/32) { Array.new(@h/32) }
end

#draw ⇒ Object 



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# File 'lib/gui/grid.rb', line 39

def draw
  x = @x + @xoff
  y = @y + @yoff
  @bg.draw(x, y, Core::GUI_Z + @zoff, @w/@bg.width.to_f, @h/@bg.height.to_f)
  @grid.each { |col|
    col.each { |tile|
      tile.icon.draw(x, y, Core::GUI_Z + @zoff + 1) if tile
      @tile.draw(x, y, Core::GUI_Z + @zoff + 1)
      y += 32
    }
    x += 32
    y = @y + @yoff
  }
  if @selected and @highlight
    @hl.draw(@x+@xoff+@highlight.x*32, @y+@yoff+@highlight.y*32, Core::GUI_Z + @zoff + 2)
  end
  if @hovered and (!@highlight or !(@hovered.x == @highlight.x and @hovered.y == @highlight.y))
    @hl.draw(@x+@xoff+@hovered.x*32, @y+@yoff+@hovered.y*32, Core::GUI_Z + @zoff + 2)
  end
end

#empty? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/gui/grid.rb', line 103

def empty?
  @grid.each { |col|
    col.each { |tile|
      return false if tile
    }
  }
  return true
end

#get_at(tx, ty) ⇒ Object 



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# File 'lib/gui/grid.rb', line 91

def get_at(tx, ty)
  return @grid[tx][ty]
rescue NoMethodError
  return nil
end

#mouse_to_tile(mx, my) ⇒ Object 



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# File 'lib/gui/grid.rb', line 97

def mouse_to_tile(mx, my)
  x = (mx - @x - @xoff).to_i / 32
  y = (my - @y - @yoff).to_i / 32
  return [x, y]
end

#update ⇒ Object 



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# File 'lib/gui/grid.rb', line 22

def update
  if Core.mouse_inside?(@x+@xoff, @y+@yoff, @x+@xoff+@w, @y+@yoff+@h)
    if Core.window.pressed?(Gosu::MsLeft)
      @highlight = mouse_to_tile(Core.window.mouse_x, Core.window.mouse_y)
      @selected = get_at(@highlight.x, @highlight.y)
    else
      @hovered = mouse_to_tile(Core.window.mouse_x, Core.window.mouse_y)
    end
  else
    @hovered = nil
    if Core.window.button_down?(Gosu::MsLeft)
      @selected = nil
      @highlight = nil
    end
  end
end