Java tutorial
/* * Copyright 2000-2014 JetBrains s.r.o. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.intellij.ui; import com.intellij.openapi.wm.IdeFocusManager; import org.jetbrains.annotations.NotNull; import org.jetbrains.annotations.Nullable; import javax.swing.*; import java.awt.*; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.io.IOException; import java.util.Iterator; import java.util.LinkedHashMap; import java.util.Map; /** * User: Vassiliy.Kudryashov */ public class JBCardLayout extends CardLayout { public enum SwipeDirection { FORWARD, BACKWARD, AUTO } private Map<String, Component> myMap = new LinkedHashMap<String, Component>(); private int mySwipeTime = 200;//default value, provide setter if need private int mySwipeSteps = 20;//default value, provide setter if need private final Timer myTimer = new Timer(Math.max(1, mySwipeTime / mySwipeSteps), null); private Component mySwipeFrom = null; private Component mySwipeTo = null; public JBCardLayout() { this(0, 0); } public JBCardLayout(int hgap, int vgap) { super(hgap, vgap); } @Override public void addLayoutComponent(String name, Component comp) { super.addLayoutComponent(name, comp); myMap.put(name, comp); } @Override public void removeLayoutComponent(Component comp) { stopSwipeIfNeed(); super.removeLayoutComponent(comp); for (Iterator<Map.Entry<String, Component>> iterator = myMap.entrySet().iterator(); iterator.hasNext();) { Map.Entry<String, Component> entry = iterator.next(); if (entry.getValue() == comp) { iterator.remove(); break; } } } @Override public void layoutContainer(Container parent) { if (!myTimer.isRunning()) { super.layoutContainer(parent); } } public void swipe(@NotNull final Container parent, @NotNull final String name, @NotNull SwipeDirection direction) { swipe(parent, name, direction, null); } public void swipe(@NotNull final Container parent, @NotNull final String name, @NotNull SwipeDirection direction, final @Nullable Runnable onDone) { stopSwipeIfNeed(); mySwipeFrom = findVisible(parent); mySwipeTo = myMap.get(name); if (mySwipeTo == null) return; if (mySwipeFrom == null || mySwipeFrom == mySwipeTo) { super.show(parent, name); if (onDone != null) { onDone.run(); } return; } final boolean isForward; if (direction == SwipeDirection.AUTO) { boolean b = true; for (Component component : myMap.values()) { if (component == mySwipeFrom || component == mySwipeTo) { b = component == mySwipeFrom; break; } } isForward = b; } else { isForward = direction == SwipeDirection.FORWARD; } final double[] linearProgress = new double[1]; linearProgress[0] = 0; final long startTime = System.currentTimeMillis(); ActionListener listener = new ActionListener() { @Override public void actionPerformed(ActionEvent e) { long timePassed = System.currentTimeMillis() - startTime; if (timePassed >= mySwipeTime) { Component currentFocusComponent = IdeFocusManager.getGlobalInstance() .getFocusedDescendantFor(parent); show(parent, name); if (currentFocusComponent != null) currentFocusComponent.requestFocusInWindow(); if (onDone != null) { onDone.run(); } return; } linearProgress[0] = Math.min(1, Math.max(0, (float) timePassed / mySwipeTime)); double naturalProgress = (1 - Math.cos(Math.PI * linearProgress[0])) / 2; Rectangle bounds = parent.getBounds(); Insets insets = parent.getInsets(); bounds.setLocation(insets.left, insets.top); bounds.width -= insets.left + insets.right; bounds.height -= insets.top + insets.bottom; Rectangle r = new Rectangle(bounds); int x = (int) ((naturalProgress * r.width)); r.translate(isForward ? -x : x, 0); mySwipeFrom.setBounds(r); Rectangle r2 = new Rectangle(bounds); r2.translate(isForward ? r2.width - x : x - r2.width, 0); mySwipeTo.setVisible(true); mySwipeTo.setBounds(r2); parent.repaint(); } }; for (ActionListener actionListener : myTimer.getActionListeners()) { myTimer.removeActionListener(actionListener); } myTimer.addActionListener(listener); myTimer.start(); } private void stopSwipeIfNeed() { if (myTimer.isRunning()) { myTimer.stop(); mySwipeFrom = null; if (mySwipeTo != null) { mySwipeTo.setVisible(false); mySwipeTo = null; } } } @Nullable private static Component findVisible(Container parent) { for (int i = 0; i < parent.getComponentCount(); i++) { Component component = parent.getComponent(i); if (component.isVisible()) return component; } return null; } @Override public void first(Container parent) { stopSwipeIfNeed(); super.first(parent); } @Override public void next(Container parent) { stopSwipeIfNeed(); super.next(parent); } @Override public void previous(Container parent) { stopSwipeIfNeed(); super.previous(parent); } @Override public void last(Container parent) { stopSwipeIfNeed(); super.last(parent); } @Override public void show(Container parent, String name) { stopSwipeIfNeed(); super.show(parent, name); } public static void main(String[] args) throws IOException { final JBCardLayout cardLayout = new JBCardLayout(); JFrame f = new JFrame(); JPanel p = new JPanel(new BorderLayout()); final JPanel centerPanel = new JPanel(cardLayout); for (int i = 0; i < 10; i++) { JLabel l = new JLabel("Page #" + (i + 1), SwingConstants.CENTER); l.setOpaque(true); int red = 50 + (int) (Math.random() * 100); int green = 50 + (int) (Math.random() * 100); int blue = 50 + (int) (Math.random() * 100); l.setForeground(new Color(red, green, blue)); red = 255 - (int) (Math.random() * 55); green = 255 - (int) (Math.random() * 55); blue = 255 - (int) (Math.random() * 55); l.setBackground(new Color(red, green, blue)); l.setFont(l.getFont().deriveFont(40F)); centerPanel.add(l, "page" + i); } final int[] cursor = new int[1]; JButton prevButton = new JButton("<<"); JButton nextButton = new JButton(">>"); prevButton.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { cursor[0]--; if (cursor[0] < 0) { cursor[0] = 9; } cardLayout.swipe(centerPanel, "page" + cursor[0], SwipeDirection.BACKWARD); } }); nextButton.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { cursor[0] = (cursor[0] + 1) % 10; cardLayout.swipe(centerPanel, "page" + cursor[0], SwipeDirection.FORWARD); } }); p.setLayout(new BorderLayout()); p.add(prevButton, BorderLayout.WEST); p.add(centerPanel, BorderLayout.CENTER); p.add(nextButton, BorderLayout.EAST); f.setContentPane(p); f.setSize(new Dimension(600, 800)); f.setLocationRelativeTo(null); f.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); f.setVisible(true); } public Component findComponentById(String id) { return myMap.get(id); } }