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Harris Geospatial / Docs Center / Using IDL / Order Method

IDL

Order Method

Order Method

The Order method controls the Z-order of a graphics item relative to other graphics items.

Example


; Create a deck of cards.
w = WINDOW()
x = [0,0.25,0.25,0]
y = [0,0,0.5,0.5]
r = OBJARR(20)
for i=0,19 do r[i] = POLYGON(x+i/30.,y+i/40.,FILL_COLOR=!COLOR.(i))
WAIT, 1
 
; Bring every other card forward by one.
for i=0,19,2 do r[i].Order, /BRING_FORWARD
WAIT, 1
 
; Send the same cards to the back.
for i=0,19,2 do r[i].Order, /SEND_TO_BACK
WAIT, 1
 
; Pick a card, any card.
card = (20*RANDOMU(seed,1))[0]
r[card].Order, /BRING_TO_FRONT

Syntax


graphic.Order [, /BRING_FORWARD] [, /BRING_TO_FRONT] [, /SEND_BACKWARD] [, /SEND_TO_BACK]

Arguments


None.

Keywords


BRING_FORWARD

Set this keyword to 1 to move the graphic item upwards in the viewing order.

BRING_TO_FRONT

Set this keyword to 1 to move the graphic item to the top of the viewing order (above all other items).

SEND_BACKWARD

Set this keyword to 1 to move the graphic item downwards in the viewing order.

SEND_TO_BACK

Set this keyword to 1 to move the graphic item to the bottom of the viewing order (below all other items).

Version History


8.0

Introduced

See Also


Select Method, Using IDL Graphics



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