Draw string and processing newlines and expanding tabs : Draw String « SWT 2D Graphics « Java Tutorial

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Java Tutorial » SWT 2D Graphics » Draw String   18. 14. 6. Draw string and processing newlines and expanding tabs void drawText(String text, int x, int y, int flags) Uses the rules specified by flags. Constant Description SWT.DRAW_DELIMITER Processes newlines by drawing subsequent characters on the next line. SWT.DRAW_TAB Processes tabs by displaying a gap between surrounding characters. SWT.DRAW_MNEMONIC Draws an underline beneath the mnemonic character-the character preceded by an ampersand (&). Use this when drawing menus. SWT.DRAW_TRANSPARENT With a transparent background: import org.eclipse.swt.SWT; import org.eclipse.swt.events.PaintEvent; import org.eclipse.swt.events.PaintListener; import org.eclipse.swt.layout.FillLayout; import org.eclipse.swt.widgets.Canvas; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Shell; public class DrawTextUnderLineSWT {   public static void main(String[] args) {     final Display display = new Display();     Shell shell = new Shell(display);     shell.setText("Canvas Example");     shell.setLayout(new FillLayout());     Canvas canvas = new Canvas(shell, SWT.NONE);     canvas.addPaintListener(new PaintListener() {       public void paintControl(PaintEvent e) {         e.gc.drawText("www.\n&java2s\t.com", 5, 5, SWT.DRAW_MNEMONIC | SWT.DRAW_DELIMITER             | SWT.DRAW_TAB | SWT.DRAW_TRANSPARENT);       }     });     shell.open();     while (!shell.isDisposed()) {       if (!display.readAndDispatch()) {         display.sleep();       }     }     display.dispose();   } } 18. 14. Draw String 18. 14. 1.  Draw string and display newlines and tabs as nonprintable characters. 18. 14. 2.  String with new line and tab 18. 14. 3.  Draw string and display newlines and tabs as nonprintable characters: isTransparent 18. 14. 4.  Draw string and process newlines and expanding tabs: drawText(String text, int x, int y) 18. 14. 5.  Draw string and process newlines and expanding tabs: drawText(String text, int x, int y, boolean isTransparent) 18. 14. 6.  Draw string and processing newlines and expanding tabs 18. 14. 7.  Get the extent of a string 18. 14. 8.  Measure a String