DISPLAY (function): Difference between revisions
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''Example:'' Creating a mouse cursor using a page number that '''you create''' in memory without setting up page flipping. | ''Example:'' Creating a mouse cursor using a page number that '''you create''' in memory without setting up page flipping. | ||
{{CodeStart}} | {{CodeStart}} | ||
{{Cl|SCREEN}} {{Cl|_NEWIMAGE}}(640, 480, 32) 'any graphics mode should work without setting up pages | {{Cl|SCREEN}} {{Cl|_NEWIMAGE}}({{Text|640|#F580B1}}, {{Text|480|#F580B1}}, {{Text|32|#F580B1}}) {{Text|<nowiki>'any graphics mode should work without setting up pages</nowiki>|#919191}} | ||
{{Cl|_MOUSEHIDE}} | {{Cl|_MOUSEHIDE}} | ||
SetupCursor | {{Text|SetupCursor|#55FF55}} | ||
{{Cl|PRINT}} "Hello World!" | {{Cl|PRINT}} {{Text|<nowiki>"Hello World!"</nowiki>|#FFB100}} | ||
{{Cl|DO}}: {{Cl|_LIMIT}} | {{Cl|DO}}: {{Cl|_LIMIT}} {{Text|30|#F580B1}} | ||
{{Cl|DO...LOOP|DO WHILE}} {{Cl|_MOUSEINPUT}}: {{Cl|LOOP}} {{Text|<nowiki>'main loop must contain _MOUSEINPUT</nowiki>|#919191}} | |||
' other program code | {{Text|<nowiki>' other program code</nowiki>|#919191}} | ||
{{Cl|LOOP}} | {{Cl|LOOP}} | ||
{{Cl|SUB}} SetupCursor | {{Cl|SUB}} {{Text|SetupCursor|#55FF55}} | ||
{{Cl|ON TIMER(n)|ON TIMER}}(0.02) UpdateCursor | {{Cl|ON TIMER(n)|ON TIMER}}({{Text|0.02|#F580B1}}) {{Text|UpdateCursor|#55FF55}} | ||
{{Cl|TIMER}} {{Cl|ON}} | {{Cl|TIMER}} {{Cl|ON}} | ||
{{Cl|END SUB}} | {{Cl|END SUB}} | ||
{{Cl|SUB}} UpdateCursor | {{Cl|SUB}} {{Text|UpdateCursor|#55FF55}} | ||
{{Cl|PCOPY}} {{Cl|_DISPLAY (function)|_DISPLAY}}, 100 | {{Cl|PCOPY}} {{Cl|_DISPLAY (function)|_DISPLAY}}, {{Text|100|#F580B1}} {{Text|<nowiki>'any page number as desination with the _DISPLAY function as source</nowiki>|#919191}} | ||
{{Cl|PSET}} ({{Cl|_MOUSEX}}, {{Cl|_MOUSEY}}), {{Cl|_RGB}}(0, 255, 0) | {{Cl|PSET}} ({{Cl|_MOUSEX}}, {{Cl|_MOUSEY}}), {{Cl|_RGB}}({{Text|0|#F580B1}}, {{Text|255|#F580B1}}, {{Text|0|#F580B1}}) | ||
{{Cl|DRAW}} "ND10F10L3F5L4H5L3" | {{Cl|DRAW}} {{Text|<nowiki>"ND10F10L3F5L4H5L3"</nowiki>|#FFB100}} | ||
{{Cl|_DISPLAY}} | {{Cl|_DISPLAY}} {{Text|<nowiki>'statement shows image</nowiki>|#919191}} | ||
{{Cl|PCOPY}} 100, {{Cl|_DISPLAY (function)|_DISPLAY}} 'with the function return as destination page | {{Cl|PCOPY}} {{Text|100|#F580B1}}, {{Cl|_DISPLAY (function)|_DISPLAY}} {{Text|<nowiki>'with the function return as destination page</nowiki>|#919191}} | ||
{{Cl|END SUB}} | {{Cl|END SUB}} | ||
{{CodeEnd}} | {{CodeEnd}} | ||
Latest revision as of 21:24, 27 March 2023
The _DISPLAY function returns the handle of the current image that is displayed on the screen.
Syntax
- currentImage& = _DISPLAY
Description
- Returns the current image handle value that is being displayed. Returns 0 if in the default screen image.
- Not to be confused with the _DISPLAY statement that displays the screen when not using _AUTODISPLAY.
Examples
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
- SCREEN
- PCOPY
- _DISPLAY (statement)
- _AUTODISPLAY (default mode)
- _DISPLAYORDER (statement)