$RESIZE

The $RESIZE metacommand determines if a program window can be resized by the user.

Syntax

$RESIZE:{ON|OFF|STRETCH|SMOOTH}

Description

• $RESIZE:ON is used to allow the program window to be resized by a program user. Otherwise it cannot be changed.
• $RESIZE:OFF (default) is used when the program's window size cannot be changed by the user.
• $RESIZE:STRETCH the screen will be stretched to fit the new window size with a 1 to 1 ratio of width and height.
• $RESIZE:SMOOTH the screen will be stretched also, but with linear filtering applied to the pixels.

Availability

• QB64 v1.0 and up
• QB64-PE all versions

Examples

Example: Resizing a program screen when the user changes it without clearing the entire screen image:

$RESIZE:ON SCREEN _NEWIMAGE(160, 140, 32) _DELAY 0.1 _SCREENMOVE 20, 20 _DISPLAY ' CLEAR _RESIZE FLAG BY READING IT ONCE temp& = _RESIZE DO _LIMIT 60 IF CheckResize(_SOURCE) = -1 THEN FOR i = 1 TO 10 CIRCLE (RND * _WIDTH(0) - 1, RND * _HEIGHT(0) - 1), RND * 100 + 5, _RGB32(RND * 255, RND * 255, RND * 255) NEXT ELSE FOR i = 1 TO 200 PSET (RND * _WIDTH(0) - 1, RND * _HEIGHT(0) - 1), _RGB32(RND * 255, RND * 255, RND * 255) NEXT END IF _DISPLAY k& = _KEYHIT LOOP UNTIL k& = 27 OR k& = 32 SYSTEM ' ************************************************************************************************* ' * * ' * CheckResize: This FUNCTION checks if the user resized the window, and if so, recreates the * ' * ORIGINAL SCREEN image to the new window size. * ' * * ' * Developer Note: You must use $RESIZE:ON, $RESIZE:SMOOTH, or $RESIZE:SMOOTH at * ' * the beginning of your project for this to work. * ' * This FUNCTION only works in QB64 version 1.000 and up. * ' * * ' ************************************************************************************************* FUNCTION CheckResize (CurrentScreen AS _UNSIGNED LONG) ' *** Define local variable for temporary screen DIM TempScreen AS _UNSIGNED LONG CheckResize = 0 ' *** Check to see if the user resized the window. If so, change the SCREEN image to the correct size. IF _RESIZE THEN ' *** First, create a copy of the current SCREEN image. TempScreen = _COPYIMAGE(CurrentScreen, 32) ' *** Set the SCREEN to the copied image, releasing the current SCREEN image. SCREEN TempScreen ' *** Remove (FREE) the original SCREEN image. _FREEIMAGE CurrentScreen ' *** Create a new "original" SCREEN image. CurrentScreen = _NEWIMAGE(_RESIZEWIDTH, _RESIZEHEIGHT, 32) ' *** Set the SCREEN to the new "original" image, releasing the copied SCREEN image. SCREEN CurrentScreen ' DRAW PREVIOUS SCREEN ON THE NEW ONE _PUTIMAGE (0, 0), TempScreen, CurrentScreen _DISPLAY ' *** Remove (FREE) the copied SCREEN image. _FREEIMAGE TempScreen ' *** Tell the caller there was a resize CheckResize = -1 END IF END FUNCTION

Code by waltersmind

See also

• _RESIZE, _RESIZE (function)
• _RESIZEWIDTH, _RESIZEHEIGHT (functions return the requested dimensions)

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