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Categories / Java Tutorial / SWT 2D Graphics

 

Draw string and processing newlines and expanding tabs

void drawText(String text,  int x,  int y,  int flags) Uses the rules specified by flags. ConstantDescription SWT.DRAW_DELIMITERProcesses newlines by drawing subsequent characters on the next line. SWT.DRAW_TABProcesses tabs by displaying a gap between surrounding characters. SWT.DRAW_MNEMONICDraws an underline beneath the mnemonic character-the character preceded by an ampersand (&). Use this when drawing menus. SWT.DRAW_TRANSPARENTWith 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&rntsoft\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();   } }