Java Code Examples for org.eclipse.jface.resource.FontDescriptor#createFont()

/**
 * Converts the font of the control by adding a single style bit, unless the font already have
 * that style.
 * <p>
 * If the font is converted, it will attach a {@link DisposeListener}
 * to the <code>control</code> to dispose the font when it's not needed anymore.
 * <p>
 * <em>If converting fonts is a frequent operation, this method will create
 * several {@link DisposeListener}s that can lead to high resource allocation</em>
 *
 * @param control whose font will be changed
 * @param style e.g. SWT.BOLD or SWT.ITALIC
 */
public static void convertFont(Control control, int style) {
  for (FontData fontData : control.getFont().getFontData()) {
    if (hasStyle(fontData, style)) {
      return;
    }
  }
  FontDescriptor fontDescriptor = FontDescriptor.createFrom(control.getFont()).setStyle(style);
  final Font newFont = fontDescriptor.createFont(control.getDisplay());
  control.setFont(newFont);
  control.addDisposeListener(new DisposeListener() {
    @Override
    public void widgetDisposed(DisposeEvent event) {
      newFont.dispose();
    }
  });
}
 

protected int getTextExtend(Font font, String string) {
	if (string.isEmpty())
		return 0;
	if (zoom != 1.0) {
		FontData data = font.getFontData()[0];
		FontDescriptor newFontDescriptor = FontDescriptor.createFrom(font)
				.setHeight((int) (data.getHeight() * zoom));
		font = newFontDescriptor.createFont(Display.getDefault());
	}
	if (gc.getFont() != font)
		gc.setFont(font);
	int offset = gc.textExtent(string).x;
	if (zoom != 1.0) {
		font.dispose();
	}
	return (int) Math.ceil((offset / zoom));
}
 

@Override
public Font getFont(Object element){
	if (element instanceof Reminder) {
		Reminder reminder = (Reminder) element;
		if (boldFont == null) {
			Display disp = Display.getCurrent();
			Font defaultFont = cv.getViewerWidget().getControl().getFont();
			FontDescriptor boldDescriptor =
				FontDescriptor.createFrom(defaultFont).setStyle(SWT.BOLD);
			boldFont = boldDescriptor.createFont(disp);
		}
		Priority prio = reminder.getPriority();
		if (Priority.HIGH == prio) {
			return boldFont;
		}
	}
	return null;
}
 

private int drawTextPart(GC gc, int yStartPos, int xStartPos, TextPart text){
	Point textExtent = new Point(0, 0);
	if (text.getStyle() == TextPart.PartStyle.NORMAL) {
		textExtent = gc.stringExtent(text.getText());
		gc.drawText(text.getText(), xStartPos, yStartPos + spacing,
			SWT.DRAW_TRANSPARENT | SWT.DRAW_DELIMITER);
	} else if (text.getStyle() == TextPart.PartStyle.BOLD) {
		Font origFont = gc.getFont();
		FontDescriptor boldDescriptor =
			FontDescriptor.createFrom(gc.getFont()).setStyle(SWT.BOLD);
		Font boldFont = boldDescriptor.createFont(Display.getDefault());
		gc.setFont(boldFont);
		textExtent = gc.stringExtent(text.getText());
		gc.drawText(text.getText(), xStartPos, yStartPos + spacing,
			SWT.DRAW_TRANSPARENT | SWT.DRAW_DELIMITER);
		gc.setFont(origFont);
		boldFont.dispose();
	}
	return xStartPos + textExtent.x;
}
 

@Override
public void applyStyles(final TextStyle textStyle)
{
    FontDescriptor boldDescriptor = FontDescriptor.createFrom(new FontData()).setStyle(SWT.BOLD);
    Font boldFont = boldDescriptor.createFont(Display.getCurrent());
    textStyle.font = boldFont;
}
 

private static void createSubtitleLabel(Composite parent, String text) {
    final Label label = new Label(parent, SWT.WRAP);
    label.setText(text + ':');
    final FontDescriptor boldDescriptor = FontDescriptor.createFrom(parent.getFont()).setStyle(SWT.BOLD);
    final Font boldFont = boldDescriptor.createFont(parent.getDisplay());
    label.setFont(boldFont);
    label.addDisposeListener(event -> boldDescriptor.destroyFont(boldFont));
}
 

private static Label createErrorLabel(Composite parent) {
    final Label label = new Label(parent, SWT.WRAP);
    Color color = new Color(parent.getDisplay(), 0xe7, 0x4c, 0x3c);
    label.setForeground(color);
    final FontDescriptor fd = FontDescriptor.createFrom(parent.getFont());
    Font font = fd.createFont(parent.getDisplay());
    label.setFont(font);

    label.addDisposeListener(e -> {
        color.dispose();
        fd.destroyFont(font);
    });

    return label;
}
 

private void createPageLabel(Composite composite, GridData gridData) {
	Label label = new Label(composite, SWT.LEFT);
	label.setText(document.getTitle());
	FontDescriptor boldDescriptor = FontDescriptor.createFrom(label.getFont()).setStyle(SWT.BOLD);
	Font boldFont = boldDescriptor.createFont(label.getDisplay());
	label.setFont(boldFont);
	label.setLayoutData(gridData);
}
 

@Override
public Font getFont(Object element) {
	if (!engineList.getChecked(element))
		return null;
	if (boldFont == null) {
		FontDescriptor fontDescriptor = JFaceResources.getDialogFontDescriptor();
		fontDescriptor = fontDescriptor.setStyle(SWT.BOLD);
		boldFont = fontDescriptor.createFont(Display.getCurrent());
	}
	return boldFont;
}
 

@Override
public void applyStyles(TextStyle textStyle) {
	if(parentStyler != null) {
		parentStyler.applyStyles(textStyle);
	}
	
	Font font = textStyle.font;
	if(font == null) {
		font = JFaceResources.getDefaultFont(); 
	}
	FontDescriptor fontDescriptor = FontDescriptor.createFrom(font);
	fontDescriptor = getModifiedFontDescriptor(fontDescriptor);
	textStyle.font = fontDescriptor.createFont(Display.getCurrent());
}
 

/**
 * Changes a control's font
 * @param control
 * @param style
 */
public static void changeFont(Control control, int style) {
    FontDescriptor boldDescriptor = FontDescriptor.createFrom(control.getFont()).setStyle(style);
    final Font boldFont = boldDescriptor.createFont(control.getDisplay());
    control.setFont(boldFont);
    control.addDisposeListener(new DisposeListener() {
        @Override
        public void widgetDisposed(DisposeEvent arg0) {
            if (boldFont != null && !boldFont.isDisposed()) {
                boldFont.dispose();
            }
        }
        
    });
}
 

private Font getFont() {
	if (font != null)
		return font;
	FontDescriptor desc = FontDescriptor.createFrom(
			Display.getCurrent().getSystemFont()).setStyle(SWT.ITALIC);
	font = desc.createFont(Display.getCurrent());
	return font;
}
 

private Font getBoldFontFor(Label categoryTextLabel) {
    FontDescriptor boldDescriptor = FontDescriptor.createFrom(categoryTextLabel.getFont()).setStyle(SWT.BOLD);
    Font boldFont = boldDescriptor.createFont(categoryTextLabel.getDisplay());
    return boldFont;
}
 

protected void setBoldFont(Font f) {
	if (boldFont != null)
		boldFont.dispose();
	FontDescriptor boldDescriptor = FontDescriptor.createFrom(getFont()).setStyle(SWT.BOLD);
	boldFont = boldDescriptor.createFont(Display.getDefault());
}
 

/**
 * Construct the GUI under the given parent.
 *
 * @param parent the parent Composite.
 * @return the top level widget.
 */
private Composite setupComposite(Composite parent) {
  // widgets
  Composite topLevel = new Composite(parent, SWT.NONE);

  Label labelId = new Label(topLevel, SWT.NONE);
  id = new Label(topLevel, SWT.NONE);
  Label labelName = new Label(topLevel, SWT.NONE);
  name = new Label(topLevel, SWT.NONE);
  Label labelDescription = new Label(topLevel, SWT.NONE);
  description = new Label(topLevel, SWT.NONE);
  Label labelQuarter = new Label(topLevel, SWT.NONE);
  quarter = new Label(topLevel, SWT.NONE);
  Label labelUpdatedBy = new Label(topLevel, SWT.NONE);
  updatedBy = new Label(topLevel, SWT.NONE);

  // content
  labelId.setText("ID");
  labelName.setText("Name");
  labelDescription.setText("Description");
  labelQuarter.setText("Quarter");
  labelUpdatedBy.setText("Updated by");

  // layout
  GridLayout layout = new GridLayout(2, false);
  layout.horizontalSpacing = 22;
  layout.verticalSpacing = 9;
  topLevel.setLayout(layout);
  id.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, false));
  name.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, false));
  description.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, false));
  quarter.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, false));
  updatedBy.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, false));

  Font font = name.getFont();
  FontDescriptor bold = FontDescriptor.createFrom(font);
  bold = bold.setStyle(SWT.BOLD);
  FontDescriptor big = bold.setHeight(18);
  Font boldFont = bold.createFont(font.getDevice());

  name.setFont(big.createFont(font.getDevice()));
  id.setFont(boldFont);
  description.setFont(boldFont);
  quarter.setFont(boldFont);
  updatedBy.setFont(boldFont);

  return topLevel;
}