Get Preferred size : Widget « SWT « Java Tutorial

1. Java Tutorial
2. SWT
3. Widget

(From SWT API) The preferred size of a control is the size that it would best be displayed at. The width hint and height hint arguments allow the caller to ask a control questions such as "Given a particular width, how high does the control need to be to show all of the contents?" To indicate that the caller does not wish to constrain a particular dimension, the constant SWT.DEFAULT is passed for the hint.

import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;

public class GetPreferredSize {

  public static void main(String[] args) {
    final Display display = new Display();
    Shell shell = new Shell(display);

    shell.setLayout(new GridLayout());

    Button button = new Button(shell, SWT.PUSH | SWT.LEFT);
    button.setText("Button");

    System.out.println("toControl: " + button.toControl(100, 200));

    shell.open();
    while (!shell.isDisposed()) {
      if (!display.readAndDispatch()) {
        display.sleep();
      }
    }
  }
}

17.2.Widget
	17.2.1.	Set Control Size
	17.2.2.	The Widget Class
	17.2.3.	Get Widget Style
	17.2.4.	Widget can be disposed: addDisposeListener(DisposeListener listener)
	17.2.5.	Control Size and location
	17.2.6.	Set Bounds
	17.2.7.	Set Location and Size
	17.2.8.	Control: set a background image (a dynamic gradient)
	17.2.9.	Inherit a background color or image
	17.2.10.	Setting Widget bounds
	17.2.11.	Compute Widget Size
	17.2.12.	Get Preferred size
	17.2.13.	Relative position to Control
	17.2.14.	Relative position to Display
	17.2.15.	Add ControlListener to control