Difference between revisions of "DISPLAY (function)"

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* [[SCREEN]] {{text|(note the QB64 use of SCREEN to set which image to display)}}
 
* [[SCREEN]] {{text|(note the QB64 use of SCREEN to set which image to display)}}
 
* [[PCOPY]]
 
* [[PCOPY]]
* [[_DISPLAY]] (statement)
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* [[_DISPLAY]] {{text|(statement)}}
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* [[_AUTODISPLAY]] {{text|(default mode)}}
  
  
 
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Revision as of 01:08, 4 October 2012

The _DISPLAY function returns the handle of the current image that is displayed on the screen.


Syntax

currentimage& = _DISPLAY


Usage:

  • Returns the current image handle value that is being displayed. Will return 0 if in the default image.
  • Not to be confused with the _DISPLAY statement that displays the screen when not using _AUTODISPLAY.


Example: Creating a mouse cursor using a page number that you create in memory without setting up page flipping.

SCREEN _NEWIMAGE(640, 480, 32) 'any graphics mode should work without setting up pages _MOUSEHIDE SetupCursor PRINT "Hello World!" DO: _LIMIT 30 DO WHILE _MOUSEINPUT: LOOP 'main loop must contain _MOUSEINPUT ' other program code LOOP SUB SetupCursor ON TIMER(0.02) UpdateCursor TIMER ON END SUB SUB UpdateCursor PCOPY _DISPLAY, 100 'any page number as desination with the _DISPLAY function as source PSET (_MOUSEX, _MOUSEY), _RGB(0, 255, 0) DRAW "ND10F10L3F5L4H5L3" _DISPLAY 'statement shows image PCOPY 100, _DISPLAY 'with the function return as destination page END SUB

Note: Works with the _DISPLAY function return as the other page. If mouse reads are not crucial, put the _MOUSEINPUT loop inside of the UpdateCursor Sub.


See also



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