Description
|
Given a _PointerData structure with
co-ordinate data, modifies the co-ordinates to fit in the rectangle specified
in TBApiSetScaleDimensions. Typically
used to map pointer co-ordinates to a window size. |
|
Parameters |
Scale
handle, data and storage for X and Y co-ords. |
|
Returns |
0 = fail, 1 = OK. |
|
Notes |
None. |
Visual C++ Declaration/example
BOOL TBAPI TBApiScaleCoordinates(long* handle, _PointerData* data,
unsigned short* x,unsigned short* y);
//
// At window creation
//
long scaleHandle = -1;
TBApiSetScaleDimensions(&scaleHandle,l,t,r,b); // where l,t,r,b
represent the window initial co-ordinates
//
// Whenever window is moved or resized
//
TBApiSetScaleDimensions(&scaleHandle,l,t,r,b); // where l,t,r,b
represent the new window co-ordinates
//
// In data callback
//
unsigned short x,y;
TBApiScaleCoordinates(scaleHandle,data,&x,&y); // x,y now hold
the co-ordinate values from data mapped to the target area
Public Declare Function
TBApiScaleCoordinates Lib "TBapi" Alias
"_DLL_TBApiScaleCoordinates@16" (ByVal handle As Long, ByVal data As
Long, ByVal x As Long, ByVal y As Long) As Long
' At window creation
Dim scaleHandle As Long
scaleHandle = -1
Dim addrScaleHandle As Long
addrScaleHandle = VarPtr(scaleHandle)
TBApiSetScaleDimensions addrScaleHandle, l, t, r, b ' where l,t,r,b
represent the window initial co-ordinates
' Whenever window is moved or resized
TBApiSetScaleDimensions addrScaleHandle, l, t, r, b ' where l,t,r,b
represent the new window co-ordinates
' In data callback
Dim x, y As Long
Dim addrx, addry, addrdata As Long
addrx = VarPtr(x)
addry = VarPtr(y)
TBApiScaleCoordinates addrScaleHandle, data, addrx, addry ' x,y now hold
the co-ordinate values from data mapped to the target area