SWT contro: todisplay and tocontrol

Several important methods of control

1. Control. todisplay (x, y)

Method prototype:
/**
Returns a point which is the result of converting the argument, which is specified in coordinates relative
The aggreger, to display relative coordinates
*/

Public point todisplay (int x, int y ){
Checkwidget ();
Point Pt = new point ();
PT. x = x; Pt. Y = y;
OS. clienttoscreen (handle, pt );
Return new point (Pt. X, Pt. y );
}

Convert X and Y from the relative value of control to the absolute value of Display (screen. This method is often used.

 

2. control class:
Control. tocontrol (point)
Returns a point which is the result of converting the argument, which is specified in display relative coordinates,
To coordinates relative to the handler.
Converts the absolute value of point from display to the relative value of control.