| Java-GNOME 2.10 GNOME Tutorial | ||
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There are widgets in GTK and GNOME whose sole purpose is to contain other widgets. This chapter will discuss a few of these widgets.
The Alignment container is designed to hold a single widget and control the widgets size and position. The widget is positioned in the container a certain percentage of the distance from the top and left sides of the container. The widget is sized a certain percentage of the containers height and width. Let's look at a small example to demonstrate it usage.
Example 1. Alignment.java - Alignment
import org.gnu.gtk.Alignment;
import org.gnu.gtk.Button;
import org.gnu.gtk.Gtk;
import org.gnu.gtk.Window;
import org.gnu.gtk.WindowType;
import org.gnu.gtk.event.LifeCycleEvent;
import org.gnu.gtk.event.LifeCycleListener;
public class AlignmentExample {
public AlignmentExample() {
Window window = new Window(WindowType.TOPLEVEL);
window.setTitle("Alignment Example");
window.addListener(new LifeCycleListener() {
public void lifeCycleEvent(LifeCycleEvent event) {}
public boolean lifeCycleQuery(LifeCycleEvent event) {
Gtk.mainQuit();
return false;
}
});
window.setDefaultSize(100, 100);
Button button = new Button("The Button Label", false);
// We will create an Alignment and add the button to it.
// The x alignment is set to 1.0, which keeps the button
// against the right edge. The y alignment is 0.5, keeping
// the widget vertically centered. The scale value is set
// to 0.15 in both directions, which limits the expansion
// of the button to no more than 15 percent of the area
// made available to it.
Alignment alignment = new Alignment(1.0, 0.5, 0.15, 0.15);
alignment.add(button);
window.add(alignment);
window.showAll();
}
public static void main(String[] args) {
// Initialize GTK
Gtk.init(args);
AlignmentExample align = new AlignmentExample();
Gtk.main();
}
} |
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| Using Layout Managers | Frame |