Chapter 2. General object methods- the class hk_visible

Each visible object of hk_classes is inherited from a class called hk_visible, so we will now have a look on the general available methods


Figure 2-1. Geometry specific methods

set_size(x, y,width,height)

lets you to set position and size of an object

set_size(width,height)

lets you to set size of an object

set_position(x,y)

lets you to set position of an object

set_x(x)

lets you to set the horizontal position of an object

set_y(y)

lets you to set the vertical position of an object

set_width(width)

set_height(height)

x()

returns the x co-ordinate of the object

y()

returns the y co-ordinate of the object

width()

returns the width of the object

height()

returns the height of the object



Figure 2-2. Look and Feel methods

set_font(fontname,size)

sets the font, e.g. set_font("Arial",12)

set_font(font)

hk_font font()

returns a font object

set_foregroundcolour(colour)

foregroundcolour()

set_backgroundcolour(colour)

hk_colour backgroundcolour()



Figure 2-3. Miscelleanous methods

set_label(labeltext)

label()

enum enum_visibletype {textlabel,button,rowselector,boolean,lineedit,memo,combobox,grid,form,report,reportsection,reportdata,other}

enum_visibletype type(void)

identifier()

hk_presentation* presentation()

returns the parent presentation object (either a form or a report)


The following example shows how to move the button within the form, how to change the colour and how to display different text on the button.

Example 2-1. Changing colour and position

   1 redcolour =hk_colour(255,0,0)
   2 greencolour =hk_colour(0,255,0)
   3 if hk_this.foregroundcolour().red()!=255:
   4 	hk_this.set_foregroundcolour(redcolour)
   5 	hk_this.set_backgroundcolour(greencolour)
   6 	hk_this.set_label("green button")
   7 else:
   8 	hk_this.set_foregroundcolour(greencolour)
   9 	hk_this.set_backgroundcolour(redcolour)
  10 	hk_this.set_label("red button")
  11 
  12 hk_this.set_position(hk_this.x()+50,hk_this.y()+10)
  13 


Figure 2-4. Predefined colour names

  • hk_aqua

  • hk_beige

  • hk_black

  • hk_blue

  • hk_brown

  • hk_fuchsia

  • hk_darkgrey

  • hk_green

  • hk_grey

  • hk_lightgrey

  • hk_lime

  • hk_maroon

  • hk_navy

  • hk_olive

  • hk_orange

  • hk_pink

  • hk_purple

  • hk_red

  • hk_silver

  • hk_teal

  • hk_white

  • hk_yellow