WinPtInRect: Difference between revisions
Created page with "This function ''queries whether a point lies within a rectangle''. ==Syntax== WinPtInRect(hab, prcl, pptl) ==Parameters== ;hab (HAB) - Input : Anchor-block handle. ;prcl (PRECTL) - Input : Rectangle to be queried. :;Note :: The value of each field in this structure must be in the range -32 768 through 32 767. The data type WRECT may also be used, if supported by the language. ;pptl (PPOINTL) - Input : Point to be queried. ==Returns== ;rc (BOOL) -..." |
|||
| Line 87: | Line 87: | ||
* [[WinIsRectEmpty]] | * [[WinIsRectEmpty]] | ||
* [[WinOffsetRect]] | * [[WinOffsetRect]] | ||
* [[WinSetRect]] | * [[WinSetRect]] | ||
* [[WinSetRectEmpty]] | * [[WinSetRectEmpty]] | ||
Latest revision as of 02:13, 9 April 2025
This function queries whether a point lies within a rectangle.
Syntax
WinPtInRect(hab, prcl, pptl)
Parameters
- hab (HAB) - Input
- Anchor-block handle.
- prcl (PRECTL) - Input
- Rectangle to be queried.
- Note
- The value of each field in this structure must be in the range -32 768 through 32 767. The data type WRECT may also be used, if supported by the language.
- pptl (PPOINTL) - Input
- Point to be queried.
Returns
- rc (BOOL) - returns
- Success indicator.
- TRUE
- pptl lies within prcl.
- FALSE
- pptl does not lie within prcl, or an error occurred.
Remarks
(No additional remarks were provided in the original text.)
Errors
Possible returns from WinGetLastError: (No specific errors were listed in the provided text.)
Example Code
#define INCL_WINRECTANGLES /* Or use INCL_WIN, INCL_PM, */ #include <os2.h> HAB hab; /* Anchor-block handle. */ PRECTL prcl; /* Rectangle to be queried. */ PPOINTL pptl; /* Point to be queried. */ BOOL rc; /* Success indicator. */ rc = WinPtInRect(hab, prcl, pptl);
This example processes a WM_BUTTON1UP message, converts the mouse pointer coordinates into a POINTL structure, and calls WinPtInRect to determine if the mouse was clicked in the predefined global rectangle.
#define INCL_WIN
#define INCL_WINRECTANGLES
#include <OS2.H>
HAB hab; /* anchor-block handle */
/* . */
/* . */
RECTL rclGlobal;
POINTL ptl;
HPS hps;
USHORT msg;
MPARAM mp1;
/* inside client window function */
switch(msg)
{
case WM_COMMAND:
/* The user has chosen a menu item. Process the selection */
/* accordingly. */
switch ( SHORT1FROMMP( mp1 ) )
{
case WM_BUTTON1UP:
ptl.x = (LONG) SHORT1FROMMP(mp1);
ptl.y = (LONG) SHORT2FROMMP(mp1);
WinPtInRect(hab, /* anchor-block handle */
&rclGlobal, /* address of the rectangle */
&ptl); /* address of the point */
break;
}
break;
}