Java tutorial
/* * Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies). * All rights reserved. * This component and the accompanying materials are made available * under the terms of "Eclipse Public License v1.0" * which accompanies this distribution, and is available * at the URL "http://www.eclipse.org/legal/epl-v10.html". * * Initial Contributors: * Nokia Corporation - Initial contribution * * Contributors: * * Description: This file is part of com.nokia.tools.variant.navigator component. */ package com.nokia.tools.variant.navigator.views; import java.util.ArrayList; import java.util.List; import org.eclipse.core.runtime.ListenerList; import org.eclipse.draw2d.ColorConstants; import org.eclipse.jface.window.ToolTip; import org.eclipse.swt.SWT; import org.eclipse.swt.custom.ScrolledComposite; import org.eclipse.swt.events.ControlAdapter; import org.eclipse.swt.events.ControlEvent; import org.eclipse.swt.events.ControlListener; import org.eclipse.swt.events.DisposeEvent; import org.eclipse.swt.events.DisposeListener; import org.eclipse.swt.events.FocusEvent; import org.eclipse.swt.events.FocusListener; import org.eclipse.swt.events.KeyEvent; import org.eclipse.swt.events.KeyListener; import org.eclipse.swt.events.MouseAdapter; import org.eclipse.swt.events.MouseEvent; import org.eclipse.swt.events.PaintEvent; import org.eclipse.swt.events.PaintListener; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.events.SelectionListener; import org.eclipse.swt.graphics.Color; import org.eclipse.swt.graphics.Point; import org.eclipse.swt.graphics.RGB; import org.eclipse.swt.graphics.Rectangle; import org.eclipse.swt.widgets.Canvas; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Control; import org.eclipse.swt.widgets.Event; import org.eclipse.swt.widgets.Label; import org.eclipse.swt.widgets.Layout; import org.eclipse.swt.widgets.Text; import org.eclipse.swt.widgets.Widget; import com.nokia.tools.variant.common.ui.utils.SWTUtil; public class NavigatorComposite extends Canvas implements KeyListener { private static final class DisposeHandler implements DisposeListener { static final DisposeListener INSTANCE = new DisposeHandler(); public void widgetDisposed(DisposeEvent e) { ((NavigatorComposite) e.widget).handleDisposed(); } } private static final class PaintHandler implements PaintListener { static final PaintListener INSTANCE = new PaintHandler(); public void paintControl(PaintEvent e) { ((NavigatorComposite) e.widget).handlePaint(e); } } private static final class ControlHandler extends ControlAdapter { static final ControlListener INSTANCE = new ControlHandler(); @Override public void controlResized(ControlEvent e) { ((NavigatorComposite) e.widget).handleResized(e); } } private static final Color COLOR_TT_BACKGROUND = new Color(null, new RGB(245, 245, 200)); private static final Color COLOR_TT_FOREGROUND = new Color(null, new RGB(0, 0, 0)); /** Listeners of widget selection */ protected final ListenerList listeners; /** Child widgets */ protected final List<NavigatorButton> buttons; /** Currently selected widget if any */ protected NavigatorButton selectedButton = null; protected final SelectionListener buttonListener; private Text titleText = null; public Text getTitleText() { return titleText; } public void setTitleText(Text titleText) { this.titleText = titleText; } public NavigatorComposite(Composite parent, int style, NavigatorViewer viewer) { super(parent, style | SWT.DOUBLE_BUFFERED); addKeyListener(this); this.listeners = new ListenerList(); this.buttons = new ArrayList<NavigatorButton>(); this.buttonListener = new SelectionListener() { public void widgetDefaultSelected(SelectionEvent e) { setSelectedWidget((NavigatorButton) e.widget); } public void widgetSelected(SelectionEvent e) { setSelectedWidget((NavigatorButton) e.widget); } }; this.addFocusListener(new FocusListener() { public void focusGained(FocusEvent e) { if (selectedButton != null && selectedButton.getSelectedLabel() != null) { NavigatorLabel label = selectedButton.getSelectedLabel(); label.updateColors(true); Rectangle bounds = label.getBounds(); redraw(bounds.x, bounds.y, bounds.width, bounds.height, false); } } public void focusLost(FocusEvent e) { if (selectedButton != null && selectedButton.getSelectedLabel() != null) { NavigatorLabel label = selectedButton.getSelectedLabel(); label.updateColors(false); Rectangle bounds = label.getBounds(); redraw(bounds.x, bounds.y, bounds.width, bounds.height, false); } } }); setBackground(ColorConstants.white); addMouseListener(new MouseAdapter() { @Override public void mouseDown(MouseEvent e) { setFocus(); for (NavigatorButton button : getButtons()) { if (button.getBounds().contains(e.x, e.y)) { NavigatorLabel label = button.getSelectedLabel(); if (button.isExpanded()) { for (NavigatorLabel child : button.getLabels()) { if (child.getBounds().contains(e.x, e.y)) { setSelectedWidget(child); return; } } } if (button.isSelected()) { if (button.isNonExpanded()) { button.setExpanded(true); } else { button.setSelectedLabel(null); redraw(); setSelectedWidget(button); break; // button.setExpanded(!button.isExpanded()); } setSelectedWidget(label == null ? button : button.isExpanded() ? label : button); } else { setSelectedWidget(label == null ? button : label); } break; } } } }); addDisposeListener(DisposeHandler.INSTANCE); addPaintListener(PaintHandler.INSTANCE); addControlListener(ControlHandler.INSTANCE); new ToolTip(this, ToolTip.NO_RECREATE, false) { @Override protected Composite createToolTipContentArea(Event event, Composite parent) { Composite area = new Composite(parent, SWT.NONE); area.setLayout(new Layout() { @Override protected Point computeSize(Composite composite, int hint, int hint2, boolean flushCache) { Point size = new Point(5, 5); for (Control child : composite.getChildren()) { Point cs = child.computeSize(SWT.DEFAULT, SWT.DEFAULT); if (cs.x > 250) { cs = child.computeSize(250, SWT.DEFAULT); } size.x = Math.max(size.x, cs.x + 10); size.y += cs.y + 5; } return size; } @Override protected void layout(Composite composite, boolean flushCache) { Point csize = composite.getSize(); int y = 5; for (Control child : composite.getChildren()) { Point cs = child.computeSize(csize.x - 10, SWT.DEFAULT); child.setBounds(5, y, cs.x, cs.y); y += cs.y + 5; } } }); area.setBackground(COLOR_TT_BACKGROUND); area.setForeground(COLOR_TT_FOREGROUND); Label label = new Label(area, SWT.WRAP); label.setText("Undefined"); label.setBackground(COLOR_TT_BACKGROUND); label.setForeground(COLOR_TT_FOREGROUND); Point point = new Point(event.x, event.y); String text = null; outer: for (NavigatorButton button : getButtons()) { if (button.getBounds().contains(point)) { text = button.getButtonDescription(); if (button.isExpanded()) { for (NavigatorLabel labelItem : button.getLabels()) { if (labelItem.getBounds().contains(point)) { text = labelItem.getToolTipText(); break outer; } } } break; } } if (text != null) { label.setText(text); } return area; } @Override protected Object getToolTipArea(Event event) { String text = null; Rectangle bounds = null; outer: for (NavigatorButton button : getButtons()) { if (button.getBounds().contains(event.x, event.y)) { text = button.getButtonDescription(); bounds = button.getBounds(); if (button.isExpanded()) { for (NavigatorLabel labelItem : button.getLabels()) { if (labelItem.getBounds().contains(event.x, event.y)) { text = labelItem.getToolTipText(); bounds = labelItem.getBounds(); break outer; } } } break; } } return text != null && text.length() > 0 ? bounds : null; } @Override public Point getLocation(Point tipSize, Event event) { Rectangle bounds = null; outer: for (NavigatorButton button : getButtons()) { if (button.getBounds().contains(event.x, event.y)) { bounds = button.getBounds(); if (button.isExpanded()) { for (NavigatorLabel labelItem : button.getLabels()) { if (labelItem.getBounds().contains(event.x, event.y)) { bounds = labelItem.getBounds(); break outer; } } } break; } } if (bounds == null) { return super.getLocation(tipSize, event); } ScrolledComposite sc = SWTUtil.getScrolledComposite(NavigatorComposite.this); Rectangle ca = sc.getClientArea(); Point caBottom = sc.toDisplay(ca.x, ca.y + ca.height); Point display = NavigatorComposite.this.toDisplay(bounds.x, bounds.y + bounds.height); display.y = Math.min(display.y, caBottom.y); return display; } }; } public void handleDisposed() { disposeButtons(); listeners.clear(); } public NavigatorButton createButton() { NavigatorButton button = new NavigatorButton(this); button.addSelectionListener(buttonListener); buttons.add(button); if (buttons.size() == 1) { setSelectedWidget(button); } return button; } public void keyPressed(KeyEvent e) { try { if (e.keyCode == SWT.ARROW_UP && e.stateMask == SWT.NONE) { if (selectedButton == null) { return; } if (selectedButton.isExpanded()) { int idx = selectedButton.getSelectedLabelIndex(); if (idx > 0) { setSelectedWidget(selectedButton.getLabel(idx - 1), false); } else { idx = buttons.indexOf(selectedButton); if (idx > 0) { NavigatorButton button = buttons.get(idx - 1); if (button.getLabelCount() == 0) { setSelectedWidget(button, false); } else { setSelectedWidget(button.getLabel(button.getLabelCount() - 1), false); } } } } else { int idx = buttons.indexOf(selectedButton); if (idx > 0) { NavigatorButton button = buttons.get(idx - 1); if (button.getLabelCount() == 0) { setSelectedWidget(button, false); } else { setSelectedWidget(button.getLabel(button.getLabelCount() - 1), false); } } } return; } else if (e.keyCode == SWT.ARROW_DOWN && e.stateMask == SWT.NONE) { if (selectedButton == null) { return; } if (selectedButton.isExpanded()) { int idx = selectedButton.getSelectedLabelIndex(); if (idx >= 0 && idx < selectedButton.getLabelCount() - 1) { setSelectedWidget(selectedButton.getLabel(idx + 1), false); } else { idx = buttons.indexOf(selectedButton); if (idx < buttons.size() - 1) { NavigatorButton button = buttons.get(idx + 1); if (button.getLabelCount() == 0) { setSelectedWidget(button, false); } else { setSelectedWidget(button.getLabel(0), false); } } } } else { int idx = buttons.indexOf(selectedButton); if (idx < buttons.size() - 1) { NavigatorButton button = buttons.get(idx + 1); if (button.getLabelCount() == 0) { setSelectedWidget(button, false); } else { setSelectedWidget(button.getLabel(0), false); } } } return; } else if (e.keyCode == SWT.ARROW_LEFT && e.stateMask == SWT.NONE) { if (selectedButton != null) { selectedButton.setExpanded(false); setSelectedWidget(selectedButton, false); } return; } else if (e.keyCode == SWT.ARROW_RIGHT && e.stateMask == SWT.NONE) { if (selectedButton != null) { selectedButton.setExpanded(true); NavigatorLabel label = selectedButton.getSelectedLabel(); if (label != null) { setSelectedWidget(label, false); } } return; } else if (e.keyCode == SWT.TAB && e.stateMask == SWT.SHIFT) { int idx = buttons.indexOf(selectedButton); // fix bug 912 empty 1st group for (int i = --idx; i >= 0; i--) { setSelectedWidget(buttons.get(i), true); break; } NavigatorLabel label = selectedButton.getSelectedLabel(); if (label != null) { setSelectedWidget(label, false); } return; } else if (e.keyCode == SWT.TAB && e.stateMask == 0) { int idx = buttons.indexOf(selectedButton); // fix bug 912 empty 1st group for (int i = ++idx; i < buttons.size(); i++) { setSelectedWidget(buttons.get(i), true); break; } NavigatorLabel label = selectedButton.getSelectedLabel(); if (label != null) { setSelectedWidget(label, false); } return; } else if (e.keyCode == SWT.HOME) { if (!buttons.isEmpty()) { NavigatorButton button = buttons.get(0); if (button.getLabelCount() == 0) { setSelectedWidget(button, false); } else { setSelectedWidget(button.getLabel(0), false); } } return; } else if (e.keyCode == SWT.END) { if (!buttons.isEmpty()) { NavigatorButton button = buttons.get(buttons.size() - 1); if (button.getLabelCount() == 0) { setSelectedWidget(button, false); } else { setSelectedWidget(button.getLabel(button.getLabelCount() - 1), false); } } return; } else { e.doit = false; } } finally { update(); } } protected void selectButton(NavigatorButton newSelectedButton) { try { if (selectedButton != newSelectedButton) { if (selectedButton != null) { selectedButton.setExpanded(false); selectedButton.setSelected(false); if (selectedButton.getSelectedLabel() != null) { selectedButton.getSelectedLabel().setSelected(false); } } selectedButton = newSelectedButton; if (selectedButton != null) { selectedButton.setExpanded(true); selectedButton.setSelected(true); // if (selectedButton.getSelectedLabel() == null // && selectedButton.getLabels().length > 0) { // selectedButton.setSelectedLabel(0); // } if (selectedButton.getSelectedLabel() != null) { selectedButton.getSelectedLabel().setSelected(true); } } } else if (selectedButton != null && selectedButton.selectedLabel != null) { selectedButton.selectedLabel.setSelected(false); selectedButton.selectedLabel = null; } } finally { } } public void keyReleased(KeyEvent e) { Event event = new Event(); event.widget = this; final SelectionEvent se = new SelectionEvent(event); se.item = selectedWidget; for (Object obj : listeners.getListeners()) { ((SelectionListener) obj).widgetSelected(se); } } public Widget getSelectedWidget() { NavigatorButton button = getSelectedButton(); if (button == null) { return null; } NavigatorLabel label = button.getSelectedLabel(); return label == null ? button : label; } public void setSelectedWidget(Widget selection) { setSelectedWidget(selection, true); } private Widget selectedWidget; public void setSelectedWidget(Widget selection, boolean notify) { try { selectedWidget = selection; if (selection instanceof NavigatorButton) { selectButton((NavigatorButton) selection); notify = true; } else if (selection instanceof NavigatorLabel) { NavigatorLabel label = (NavigatorLabel) selection; NavigatorButton button = (NavigatorButton) label.getButton(); selectButton(button); button.setSelectedLabel(label); } else { selectButton(null); } } catch (Exception ex) { ex.printStackTrace(); } finally { if (isDisposed()) { return; } Point size = getSize(); ScrolledComposite sc = SWTUtil.getScrolledComposite(this); Rectangle ca = sc.getClientArea(); size = computeSize(ca.width, SWT.DEFAULT); // size.y = Math.max(size.y, getSize().y); sc.setMinSize(size); sc.getVerticalBar().setPageIncrement(ca.height); if (getSize().equals(size)) { Rectangle bounds = new Rectangle(0, 0, ca.width, 0); for (NavigatorButton button : getButtons()) { Point buttonSize = button.computeSize(ca.width, SWT.DEFAULT); bounds.height = buttonSize.y; button.setBounds(bounds); bounds.y += buttonSize.y; } } else { setSize(size); } // layout(true, true); redraw(); update(); if (selectedButton != null) { Rectangle bounds = selectedButton.getSelectedLabel() == null ? selectedButton.getBounds() : selectedButton.getSelectedLabel().getBounds(); Point controlSize = new Point(bounds.width, bounds.height); Point controlOrigin = SWTUtil.getControlLocation(sc, this); controlOrigin.x += bounds.x; controlOrigin.y += bounds.y; SWTUtil.ensureVisible(sc, controlOrigin, controlSize); } } if (notify) { Event event = new Event(); event.widget = this; final SelectionEvent se = new SelectionEvent(event); se.item = selection; for (Object obj : listeners.getListeners()) { ((SelectionListener) obj).widgetSelected(se); } } } @Override public boolean setFocus() { if (selectedButton == null && !buttons.isEmpty()) { setSelectedWidget(buttons.get(0)); } return forceFocus(); } public NavigatorButton getSelectedButton() { return selectedButton; } public NavigatorButton[] getButtons() { return buttons.toArray(new NavigatorButton[buttons.size()]); } public void addSelectionListener(SelectionListener listener) { listeners.add(listener); } public void removeSelectionListener(SelectionListener listener) { listeners.remove(listener); } public void disposeButtons() { setSelectedWidget(null); for (NavigatorButton button : getButtons()) { button.dispose(); } buttons.clear(); } void handlePaint(PaintEvent event) { for (NavigatorButton button : getButtons()) { button.paintControl(event); } } public void handleResized(ControlEvent e) { Point size = getSize(); Rectangle bounds = new Rectangle(0, 0, size.x, 0); for (NavigatorButton button : getButtons()) { Point buttonSize = button.computeSize(size.x, SWT.DEFAULT); bounds.height = buttonSize.y; button.setBounds(bounds); bounds.y += buttonSize.y; } } @Override public Point computeSize(int wHint, int hHint, boolean changed) { int width = 0; int height = 0; for (NavigatorButton button : getButtons()) { Point buttonSize = button.computeSize(wHint, SWT.DEFAULT); width = Math.max(width, buttonSize.x); height += buttonSize.y; } if (wHint != SWT.DEFAULT) { width = wHint; } if (hHint != SWT.DEFAULT) { height = hHint; } return new Point(width, height); } }