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| 17. 106. 1. 选择字体 |
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SWT provides the FontDialog class to display the common font selection dialog.
FontDialog's open() method returns a FontData object (or null if the user cancels the dialog), which you can use to create a Font. |
SWT uses two classes to represent fonts: |
- Font represents the onscreen font, and
- Font objects represent operating system resources, and you must dispose any you create.
- FontData represents the data used to construct the onscreen font.
- FontData objects contain only data, and aren't operating system resources, so they aren't disposed.
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import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.graphics.FontData;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.FontDialog;
import org.eclipse.swt.widgets.Shell;
public class FontSelectionDialogDisplay {
public static void main(String[] args) {
Display display = new Display();
final Shell shell = new Shell(display);
FontDialog dlg = new FontDialog(shell);
FontData fontData = dlg.open();
if (fontData != null) {
Font font = new Font(shell.getDisplay(), fontData);
font.dispose();
}
display.dispose();
}
}
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Caution: Don't dispose a font while your application is still using it. |
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