/**
* This class demonstrates ViewForm
*/ public class Look {
// Images used in the ViewForm private Image lookImage; private Image menuImage;
// Counter for titles of ViewForms private int count = 0;
/**
* Runs the application
*/ public void run() {
Display display = new Display();
Shell shell = new Shell(display);
shell.setText("Look");
// Load the images
lookImage = new Image(display, this.getClass().getResourceAsStream(
"java2s.gif"));
menuImage = new Image(display, this.getClass().getResourceAsStream(
"java2s.gif"));
createContents(shell);
shell.open(); while (!shell.isDisposed()) { if (!display.readAndDispatch()) {
display.sleep();
}
}
// We created the images, so we must dispose if (lookImage != null) lookImage.dispose(); if (menuImage != null) menuImage.dispose();
display.dispose();
}
/**
* Creates the main window's contents
*
* @param parent the main window
*/ public void createContents(Composite parent) {
parent.setLayout(new GridLayout(1, false));
// Pressing the "New Document" button will create a new ViewForm
Button button = new Button(parent, SWT.PUSH);
button.setText("New Document");
// Create the composite that holds the ViewForms final Composite composite = new Composite(parent, SWT.NONE);
composite.setLayoutData(new GridData(GridData.FILL_BOTH));
composite.setLayout(new FillLayout());
// Add the event handler to create the ViewForms
button.addSelectionListener(new SelectionAdapter() { public void widgetSelected(SelectionEvent event) {
createViewFormHelper(composite, "Document " + (++count));
composite.layout();
}
});
}
/**
* Helper function for creating the ViewForms
*
* @param parent the parent Composite
* @param text the title text
*/ private void createViewFormHelper(final Composite parent, String text) {
// Create the ViewForm final ViewForm vf = new ViewForm(parent, SWT.BORDER);
// Create the CLabel for the top left, which will have an image and text
CLabel label = new CLabel(vf, SWT.NONE);
label.setText(text);
label.setImage(lookImage);
label.setAlignment(SWT.LEFT);
vf.setTopLeft(label);
// Create the downward-pointing arrow to display the menu
// and set it as the top center final ToolBar tbMenu = new ToolBar(vf, SWT.FLAT); final ToolItem itemMenu = new ToolItem(tbMenu, SWT.PUSH);
itemMenu.setImage(menuImage);
vf.setTopCenter(tbMenu);
// Create the close button and set it as the top right
ToolBar tbClose = new ToolBar(vf, SWT.FLAT);
ToolItem itemClose = new ToolItem(tbClose, SWT.PUSH);
itemClose.setText("X");
itemClose.addSelectionListener(new SelectionAdapter() { public void widgetSelected(SelectionEvent event) {
vf.dispose();
parent.layout();
}
});
vf.setTopRight(tbClose);
// Create the content--a multi-line text box final Text textArea = new Text(vf, SWT.MULTI | SWT.WRAP | SWT.V_SCROLL);
vf.setContent(textArea);
/* Create the menu to display when the down arrow is pressed */
final Menu menu = new Menu(tbMenu);
MenuItem clear = new MenuItem(menu, SWT.NONE);
clear.setText("Clear");
clear.addSelectionListener(new SelectionAdapter() { public void widgetSelected(SelectionEvent event) {
textArea.setText("");
}
});
// Add the handler to display the menu
itemMenu.addSelectionListener(new SelectionAdapter() { public void widgetSelected(SelectionEvent event) {
// Place the menu right below the toolbar button
Rectangle rect = itemMenu.getBounds();
menu.setLocation(tbMenu.toDisplay(rect.x, rect.y + rect.height));
menu.setVisible(true);
}
});
}
/**
* The application entry point
*
* @param args the command line arguments
*/ public static void main(String[] args) { new Look().run();
}
}
