public void addPages()

in application/org.openjdk.jmc.flightrecorder.ui/src/main/java/org/openjdk/jmc/flightrecorder/ui/common/DataPageToolkit.java [975:1063]
75 lines of code
6 McCabe index (conditional complexity)

		public void addPages() {
			addPage(new WizardPage(Messages.PAGE_CHANGE_ICON_WIZARD_PAGE_TITLE) {

				@Override
				public String getTitle() {
					return Messages.PAGE_CHANGE_ICON_WIZARD_PAGE_TITLE;
				}

				@Override
				public String getDescription() {
					return Messages.PAGE_CHANGE_ICON_WIZARD_PAGE_DESC;
				}

				@Override
				public void createControl(Composite parent) {
					Composite container = new Composite(parent, SWT.NONE);
					GridLayout layout = new GridLayout(1, false);
					container.setLayout(layout);

					Button button = new Button(container, SWT.NONE);
					button.setText(Messages.PAGE_CHANGE_ICON_CHOOSE_IMAGE_FILE);

					button.addSelectionListener(new SelectionAdapter() {
						@Override
						public void widgetSelected(SelectionEvent e) {
							chooseImageFileDialog();
						}
					});

					if (currentImage != null) {
						new Label(container, SWT.NONE).setText(Messages.PAGE_CHANGE_ICON_CURRENT_ICON);
						new Label(container, SWT.BORDER).setImage(currentImage);
					}
					new Label(container, SWT.NONE).setText(Messages.PAGE_CHANGE_ICON_NEW_ICON_PREVIEW);
					imageLabel = new Label(container, SWT.BORDER);
					GridData gd = new GridData(16, 16);
					imageLabel.setLayoutData(gd);

					setControl(container);
				}

				private void chooseImageFileDialog() {
					FileDialog fileDialog = new FileDialog(getShell(), SWT.OPEN);
					String[] filterNames = new String[] {"Image Files", "All Files (*)"}; //$NON-NLS-1$ //$NON-NLS-2$
					String[] filterExtensions = new String[] {"*.gif;*.png;*.xpm;*.jpg;*.jpeg;*.tiff", "*"}; //$NON-NLS-1$ //$NON-NLS-2$
					fileDialog.setFilterNames(filterNames);
					fileDialog.setFilterExtensions(filterExtensions);
					String filename = fileDialog.open();
					if (filename == null) {
						// Dialog was cancelled. Bail out early to avoid handling that case later. Premature?
						return;
					}
					try (InputStream fis = new FileInputStream(filename)) {
						ImageData imageData = new ImageData(fis);
						// Validate image data
						if (imageData.width != 16 || imageData.height != 16) {
							imageData = resizeImage(imageData, 16, 16);
						}
						DisplayToolkit.dispose(imageLabel.getImage());
						imageLabel.setImage(new Image(getShell().getDisplay(), imageData));
						imageLabel.getParent().layout();
						setPageComplete(isPageComplete());
					} catch (Exception e) {
						// FIXME: Add proper logging
						e.printStackTrace();
					}
				}

				private ImageData resizeImage(ImageData imageData, int width, int height) {
					Image original = ImageDescriptor.createFromImageData(imageData).createImage();
					Image scaled = new Image(Display.getDefault(), width, height);
					GC gc = new GC(scaled);
					gc.setAntialias(SWT.ON);
					gc.setInterpolation(SWT.HIGH);
					gc.drawImage(original, 0, 0, imageData.width, imageData.height, 0, 0, width, height);
					gc.dispose();
					original.dispose();
					ImageData scaledData = scaled.getImageData();
					scaled.dispose();
					return scaledData;
				}

				@Override
				public boolean isPageComplete() {
					return imageLabel.getImage() != null;
				}

			});
		}