2 Visual Components Manuals

Introduction to Visual Components 2.3
if (ready)
{
if (!VA_Saccess(1,VC_HANDLE))
{
x_position = touch.x;
}
}
}
3.3.8.17 VA_Invblnk
VA_GetTouchAction (1,VC_HANDLE, 0, &touch);
VA_Srelease(1,VC_HANDLE);
y_position = touch.y;
touch_status = touch.status;
The VA_Invblnk function is only used internally.
3.3.8.18 Graphics and Text Output − VA_Line
Drawing a line takes place with the VA_Line command.
3.3.8.18.1 Parameter
I/O Parameter Type Meaning
IN enable BOOL This function is only executed if enable is TRUE.
IN VCHandle UDINT The handle returned by VA_Setup.
IN x1/y1 UINT Coordinates of the upper left edge of the line
IN x2/y2 UINT Coordinates of the lower right edge of the line
IN color UINT Color of the line
OUT Return Value UINT Not equal to 0 if error occurs
3.3.8.18.2 Example for Automation Basic
(* cyclic program *)
x1 = 100
y1 = 150
x2 = 300
y2 = 350
color = 0 ; Black
if ready 1 then
VC_HANDLE = VA_Setup(1 "vga") ,
VC_HANDLE if 0 then
ready = 1
endif
endif
if ready = 1 then
VA_Saccess(1,VC_HANDLE)= if
0 then
VA_Line (1,VC_HANDLE,x1,y1,x2,y2,color)
endif
endif
VA_Srelease(1,VC_HANDLE)
3.3.8.18.3 Example for C Programming
#include
#include
#include
UINT _GLOBAL ready;
UINT _GLOBAL x1;
UINT _GLOBAL x2;
UINT _GLOBAL y1;
UINT _GLOBAL y2;
3.3.8.17 VA_Invblnk 153