Java Reference
In-Depth Information
constraints.gridwidth = GridBagConstraints.REMAINDER;
gbLayout.setConstraints(label, constraints);
dataPane.add(label);
// Plus the code for the rest of the constructor...
}
Directory "Sketcher 5 displaying a font dialog"
With the fill constraint set as HORIZONTAL , the components in a row fill the width of the dataPane con-
tainer, but without affecting the height. With the width constraint set to REMAINDER , the label component
fills the width of the row.
Implementing the Font List
You add the JList<String> object that displays the list of fonts next, but you won't add this directly to
the dataPane panel because the list is likely to be long enough to need scrolling capability. You can obtain
the list of fonts using the GraphicsEnvironment object that encapsulates information about the system in
which the application is running. Recall that you call a static method in the GraphicsEnvironment class
to get the GraphicsEnvironment object. Here's the code to create the list of font names:
public FontDialog(SketcherFrame window) {
// Initialization as before...
// Button panel code as before...
// Set up the data input panel to hold all input components as before...
// Add the font choice prompt label as before...
// Code to set up font list choice component
GraphicsEnvironment e = GraphicsEnvironment.getLocalGraphicsEnvironment();
String[] fontNames = e.getAvailableFontFamilyNames(); // Get font names
fontList = new JList<>(fontNames); // Create list of font names
fontList.setValueIsAdjusting(true); // single event selection
fontList.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
fontList.setSelectedValue(font.getFontName(),true);
fontList.addListSelectionListener(this);
fontList.setToolTipText("Choose a font");
JScrollPane chooseFont = new JScrollPane(fontList); // Scrollable list
chooseFont.setMinimumSize(new Dimension(400,100));
chooseFont.setWheelScrollingEnabled(true);
// Enable mouse wheel
scroll
// Plus the code for the rest of the constructor...
}
Directory "Sketcher 5 displaying a font dialog"
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