Method: Legend#draw_title

Defined in:
lib/legend.rb

#draw_title(x_pos, y_pos, value, r, g, b, x_pos2 = -1,, y_pos2 = -1,, shadow = false) ⇒ Object

This function is used to write the graph title. Used with default parameters you must specify the bottom left position of the text. if you are specifying x2 and y2 the text will be centered horizontaly and verticaly in the box of coordinates (x1,y1)-(x2,y2). value correspond to the text that will be written on the graph. r, g and b are used to set the text color. Setting shadow to true will makes a shadow behind the text.



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# File 'lib/legend.rb', line 109

def draw_title(x_pos,y_pos,value,r,g,b,x_pos2=-1,y_pos2=-1,shadow=false)
  c_text_color =   allocate_color(@picture, r, g, b)
  if ( x_pos2 != -1 )
    position  = image_ftb_box(@font_size,0,@font_name,value)
    text_width = position[2]-position[0]
    x_pos      =(( x_pos2 - x_pos -text_width ) / 2 ).floor + x_pos
  end
  if ( y_pos2 != -1 )
    position   = image_ftb_box(@font_size,0,@font_name,value)
    text_height = position[5]-position[3]
    y_pos       =(( y_pos2 - y_pos - text_height ) / 2 ).floor + y_pos
  end
  if ( shadow )
    c_shadow_color = allocate_color(@picture,@shadow_r_color,@shadow_g_color,@shadow_b_color)
    image_ttf_text(@picture,@font_size,0,x_pos+@shadow_x_distance,y_pos+@shadow_y_distance, c_shadow_color ,@font_name,value)
  end
  image_ttf_text(@picture,@font_size,0,x_pos,y_pos,c_text_color,@font_name,value)
end