Java tutorial
/******************************************************************************* * Copyright (c) 2007 IBM Corporation. * All rights reserved. This program and the accompanying materials * are made available under the terms of the Eclipse Public License v1.0 * which accompanies this distribution, and is available at * http://www.eclipse.org/legal/epl-v10.html * * Contributors: * Robert Fuhrer (rfuhrer@watson.ibm.com) - initial API and implementation *******************************************************************************/ package io.usethesource.impulse.preferences.fields.details; import org.eclipse.jface.dialogs.IDialogConstants; import org.eclipse.jface.dialogs.TrayDialog; import org.eclipse.jface.resource.JFaceColors; import org.eclipse.osgi.util.NLS; import org.eclipse.swt.SWT; import org.eclipse.swt.graphics.Color; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Control; import org.eclipse.swt.widgets.Label; import org.eclipse.swt.widgets.Shell; import io.usethesource.impulse.preferences.IPreferencesService; import io.usethesource.impulse.preferences.PreferencesUtilities; import io.usethesource.impulse.preferences.fields.PreferenceDialogConstants; import io.usethesource.impulse.preferences.fields.RadioGroupFieldEditor; public class DetailsDialogForRadioGroupFields extends TrayDialog { Shell parent = null; RadioGroupFieldEditor field = null; Composite fieldHolder = null; IPreferencesService preferencesService = null; private PreferencesUtilities prefUtils = null; public DetailsDialogForRadioGroupFields(Shell parent, RadioGroupFieldEditor field, Composite fieldHolder, IPreferencesService preferencesService) { super(parent); this.parent = parent; this.field = field; this.fieldHolder = fieldHolder; this.preferencesService = preferencesService; this.prefUtils = new PreferencesUtilities(this.preferencesService); } private final static int COPY_ID = IDialogConstants.CLIENT_ID + 1; private final static int REMOVE_ID = IDialogConstants.CLIENT_ID + 2; // No empty value for radio groups //private final static int EMPTY_ID = IDialogConstants.CLIENT_ID + 4; /* * Method declared on Dialog. * * The main result is to set the preference field in a particular way, * according to the particular button pressed, but without updating the * underlying preferences node. Thus the effect of this method is to * change the field in the display without making the new value visible * to other fields. For th e new value to take effect it must be later * stored into the preferences node by some oher action (typically the * pressing of an Apply or OK button). * */ protected void buttonPressed(int buttonId) { switch (buttonId) { case COPY_ID: if (!field.isInherited()) break; String value = field.getStringValue(); prefUtils.setField(field, fieldHolder, value); break; case REMOVE_ID: // Can't clear a field that doesn't have a preference stored to start with; // the following is one way to check that. // Why would you do this if there weren't a preference stored? May want to // clear a field that was edited (or otherwise set) locally but not yet stored. if (field.getPreferencesLevel().equals(field.getLevelFromWhichLoaded())) { preferencesService.clearPreferenceAtLevel(field.getPreferencesLevel(), field.getPreferenceName()); } prefUtils.setField(field, fieldHolder); break; // case EMPTY_ID: // // No empty value // break; default: super.buttonPressed(buttonId); break; } close(); } public boolean close() { return super.close(); } /* * (non-Javadoc) Method declared on Window. */ protected void configureShell(Shell newShell) { super.configureShell(newShell); newShell.setText(NLS.bind("Details for ''" + field.getLabelText() + "''", null)); //PlatformUI.getWorkbench().getHelpSystem().setHelp(newShell, // IWorkbenchHelpContextIds.ABOUT_DIALOG); } protected Button copyButton = null; protected Button specialButton = null; protected Button emptyButton = null; Button removeButton = null; /** * Add buttons to the dialog's button bar. * * Subclasses should override. * * @param parent * the button bar composite */ protected void createButtonsForButtonBar(Composite parent) { parent.setLayoutData(new GridData(GridData.FILL_HORIZONTAL)); if (!field.getPreferencesLevel().equals(IPreferencesService.DEFAULT_LEVEL)) { copyButton = createButton(parent, COPY_ID, PreferenceDialogConstants.COPY_LABEL, false); copyButton.setEnabled(field.getPreferencesLevel() != null && field.isInherited() && field.getRadioBoxControl().isEnabled()); } // emptyButton = createButton(parent, EMPTY_ID, PreferenceDialogConstants.EMPTY_LABEL, false); // emptyButton.setEnabled(field.getPreferencesLevel() != null && // field.isEmptyStringAllowed() && field.getEmptyValue() != null && // field.getTextControl().isEnabled() && field.getTextControl().getEditable()); removeButton = createButton(parent, REMOVE_ID, PreferenceDialogConstants.REMOVE_LABEL, false); removeButton.setEnabled((field.getPreferencesLevel() != null) && !field.isInherited() && field.isRemovable() && field.getRadioBoxControl().isEnabled()); Label l = new Label(parent, SWT.NONE); l.setLayoutData(new GridData(GridData.FILL_HORIZONTAL)); GridLayout layout = (GridLayout) parent.getLayout(); layout.numColumns++; layout.makeColumnsEqualWidth = false; Button b = createButton(parent, IDialogConstants.OK_ID, IDialogConstants.OK_LABEL, true); b.setFocus(); } protected Composite workArea = null; protected Composite dialogAreaParent = null; /** * Creates and returns the contents of the upper part * of the dialog (above the button bar). * * Subclasses should override. * * @param parent the parent composite to contain the dialog area * @return the dialog area control */ protected Control createDialogArea(Composite parent) { dialogAreaParent = parent; // final Cursor hand = new Cursor(parent.getDisplay(), SWT.CURSOR_HAND); // final Cursor busy = new Cursor(parent.getDisplay(), SWT.CURSOR_WAIT); // setHandCursor(hand); // setBusyCursor(busy); // getShell().addDisposeListener(new DisposeListener() { // public void widgetDisposed(DisposeEvent e) { // setHandCursor(null); // hand.dispose(); // setBusyCursor(null); // busy.dispose(); // } // }); // Create a composite which is the parent of the top area and the bottom // button bar. This allows there to be a second child of the parent with // a banner background on top but not on the bottom Composite workArea = new Composite(parent, SWT.NONE); workArea = fillInWorkArea(workArea); return workArea; } private Composite fillInWorkArea(Composite workArea) { if (workArea.isDisposed()) System.err.println("fillInWorkArea: workArea is disposed!!!"); GridLayout workLayout = new GridLayout(); workLayout.marginHeight = 0; workLayout.marginWidth = 0; workLayout.verticalSpacing = 0; workLayout.horizontalSpacing = 0; workArea.setLayout(workLayout); workArea.setLayoutData(new GridData(GridData.FILL_BOTH)); // page group Color background = JFaceColors.getBannerBackground(parent.getDisplay()); Color foreground = JFaceColors.getBannerForeground(parent.getDisplay()); Composite top = (Composite) super.createDialogArea(workArea); // override any layout inherited from createDialogArea GridLayout layout = new GridLayout(); layout.marginHeight = 0; layout.marginWidth = 0; layout.verticalSpacing = 0; layout.horizontalSpacing = 0; top.setLayout(layout); top.setLayoutData(new GridData(GridData.FILL_BOTH)); top.setBackground(background); top.setForeground(foreground); // the image & text Composite topContainer = new Composite(top, SWT.NONE); topContainer.setBackground(background); topContainer.setForeground(foreground); layout = new GridLayout(); layout.numColumns = (1); layout.marginWidth = 0; layout.marginHeight = 0; layout.verticalSpacing = 0; layout.horizontalSpacing = 0; topContainer.setLayout(layout); GridData data = new GridData(); data.horizontalAlignment = GridData.FILL; data.grabExcessHorizontalSpace = true; topContainer.setLayoutData(data); String levelString = null; if (field.getPreferencesLevel() == null) { levelString = "Details as currently applicable"; if (preferencesService.getProject() != null) { levelString += " (including project preferences): "; } else { levelString += " (not including any project preferences): "; } } else if (field.getPreferencesLevel().equals(IPreferencesService.INSTANCE_LEVEL)) levelString = PreferenceDialogConstants.INSTANCE_LEVEL_STRING; else if (field.getPreferencesLevel().equals(IPreferencesService.CONFIGURATION_LEVEL)) levelString = PreferenceDialogConstants.CONFIGURATION_LEVEL_STRING; else if (field.getPreferencesLevel().equals(IPreferencesService.DEFAULT_LEVEL)) levelString = PreferenceDialogConstants.DEFAULT_LEVEL_STRING; else if (field.getPreferencesLevel().equals(IPreferencesService.PROJECT_LEVEL)) levelString = PreferenceDialogConstants.PROJECT_LEVEL_STRING; else levelString = PreferenceDialogConstants.UNKNOWN_LEVEL_STRING + field.getPreferencesLevel(); Label label = null; label = new Label(topContainer, SWT.LEAD); label.setText(levelString); label.setBackground(PreferencesUtilities.colorWhite); label = new Label(topContainer, SWT.LEAD); label.setText("\tCurrent value: '" + field.getStringValue()); label.setBackground(PreferencesUtilities.colorWhite); label = new Label(topContainer, SWT.LEAD); String level = PreferenceDialogConstants.getLevelName(field.getLevelFromWhichLoaded()); label.setText("\tLevel at which set: " + level); label.setBackground(PreferencesUtilities.colorWhite); // label = new Label(topContainer, SWT.LEAD); // if (field.isEmptyStringAllowed()) { // label.setText(PreferenceDialogConstants.EMPTY_OK ); // } else { // label.setText(PreferenceDialogConstants.EMPTY_NOT_OK); // } // label.setBackground(prefUtils.colorWhite); if ((field.getPreferencesLevel() != null) && field.getPreferencesLevel().equals(field.getLevelFromWhichLoaded())) { label = new Label(topContainer, SWT.LEAD); if (field.isRemovable()) { label.setText(PreferenceDialogConstants.IS_REMOVABLE); } else { label.setText(PreferenceDialogConstants.NOT_REMOVABLE); } } label.setBackground(PreferencesUtilities.colorWhite); label = new Label(top, SWT.LEAD); label.setText("~~~"); label.setVisible(false); this.workArea = workArea; return workArea; } }