Java tutorial
/** Copyright LITIS/EDA 2014 contact@docexplore.eu This software is a computer program whose purpose is to manage and display interactive digital books. This software is governed by the CeCILL license under French law and abiding by the rules of distribution of free software. You can use, modify and/ or redistribute the software under the terms of the CeCILL license as circulated by CEA, CNRS and INRIA at the following URL "http://www.cecill.info". As a counterpart to the access to the source code and rights to copy, modify and redistribute granted by the license, users are provided only with a limited warranty and the software's author, the holder of the economic rights, and the successive licensors have only limited liability. In this respect, the user's attention is drawn to the risks associated with loading, using, modifying and/or developing or reproducing the software by the user in light of its specific status of free software, that may mean that it is complicated to manipulate, and that also therefore means that it is reserved for developers and experienced professionals having in-depth computer knowledge. Users are therefore encouraged to load and test the software's suitability as regards their requirements in conditions enabling the security of their systems and/or data to be ensured and, more generally, to use and operate it in the same conditions as regards security. The fact that you are presently reading this means that you have had knowledge of the CeCILL license and that you accept its terms. */ package org.interreg.docexplore.reader.shelf; import java.awt.Color; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.image.BufferedImage; import java.util.LinkedList; import java.util.List; import java.util.Map; import org.interreg.docexplore.reader.InputManager; import org.interreg.docexplore.reader.ReaderApp; import org.interreg.docexplore.reader.gfx.GfxUtils; import org.interreg.docexplore.reader.gfx.Texture; import org.interreg.docexplore.reader.gui.GuiEvent; import org.interreg.docexplore.util.Pair; import com.badlogic.gdx.Gdx; import com.badlogic.gdx.Input; import com.badlogic.gdx.graphics.GL10; public class ShelfEngine implements InputManager.Listener, ReaderApp.Module, GuiEvent.Source { public ReaderApp app; public ShelfSpecification shelf; public boolean active; BufferedImage entryBuffer; //Texture back; Texture[] textures; public ShelfEngine(ReaderApp app) { this.app = app; this.shelf = null; this.textures = null; this.entryBuffer = new BufferedImage(Gdx.graphics.getWidth() / 9, Gdx.graphics.getHeight(), BufferedImage.TYPE_INT_ARGB); this.active = false; } int cursor = 0; public void setShelf(final ShelfSpecification shelf) { this.shelf = shelf; if (textures != null) app.submitRenderTaskAndWait(new Runnable() { public void run() { for (int i = 0; i < textures.length; i++) if (textures[i] != null) textures[i].dispose(); } }); synchronized (this) { this.textures = new Texture[shelf.entries.size()]; for (int i = 0; i < textures.length; i++) textures[i] = null; } new Thread() { public void run() { for (int i = 0; i < textures.length; i++) { GfxUtils.clear(entryBuffer, new Color(0, 0, 0, 0).getRGB()); final int index = i; final int height = shelf.entries.get(i).renderTo(entryBuffer); app.submitRenderTaskAndWait(new Runnable() { public void run() { textures[index] = new Texture(entryBuffer.getWidth(), height, true, false); textures[index].setup(entryBuffer); textures[index].update(); } }); } } }.start(); cursor = 0; } public void activate(boolean active) { if (this.active == active) return; this.active = active; if (active) { app.input.addListener(this); } else { app.input.removeListener(this); } } public synchronized void left() { if (textures == null || textures.length == 0) cursor = -1; else { cursor = (cursor + textures.length - 1) % textures.length; offset += -1; } } public synchronized void right() { if (textures == null || textures.length == 0) cursor = -1; else { cursor = (cursor + 1) % textures.length; offset += 1; } } public ShelfSpecification.Entry selectedEntry() { return cursor < 0 || shelf == null || shelf.entries == null ? null : shelf.entries.get(cursor); } int lastCursor = -1; public void update() { alpha = Math.max(0, Math.min(1, alpha + (active ? .02f : -.02f))); if (!dragging && textures != null && textures.length > 0) { offset += voffset; offset += -.05 * offset; if (Math.abs(voffset) > .001) { int dec = (int) Math.round(offset); cursor = (cursor - dec) % textures.length; cursor = cursor < 0 ? textures.length - (-cursor) % textures.length : cursor; offset -= dec; } } voffset *= .9; if (cursor != lastCursor) { ShelfSpecification.Entry entry = selectedEntry(); app.logger.addEntry( "Current shelf entry: " + (entry == null ? "none" : entry.title + " (" + entry.src + ")")); lastCursor = cursor; } } float[] defaultColor = { .7f, .7f, .7f }; float[] selectColor = { .2f, .3f, 1 }; double offset = 0; float alpha = 0; public synchronized void render() { if (alpha < .01) return; GL10 gl = Gdx.gl10; gl.glDisable(GL10.GL_LIGHTING); gl.glDisable(GL10.GL_DEPTH_TEST); gl.glDisable(GL10.GL_CULL_FACE); gl.glDisable(GL10.GL_STENCIL_TEST); gl.glMatrixMode(GL10.GL_MODELVIEW); gl.glPushMatrix(); gl.glLoadIdentity(); gl.glMatrixMode(GL10.GL_PROJECTION); gl.glPushMatrix(); gl.glLoadIdentity(); gl.glOrthof(0, Gdx.graphics.getWidth(), Gdx.graphics.getHeight(), 0, -1, 1); gl.glEnable(GL10.GL_TEXTURE_2D); if (textures == null) cursor = -1; else if (cursor > textures.length) cursor = textures.length - 1; if (cursor >= 0) { for (int i = 0; i < textures.length; i++) { int j = (textures.length / 2 + (i + 1) / 2 * (i % 2 == 0 ? 1 : -1)) % textures.length; int index = (cursor + j) % textures.length; Texture tex = textures[index]; if (tex != null) { double x = getEntryX(j); double y = getEntryY(j); float k = (float) (.75 + .125 * (y + 1)); k *= k; //float colk = (float)(.5*(y+1)); gl.glColor4f(1, 1, 1, alpha * k); float x0 = (float) (.5 * (Gdx.graphics.getWidth() - k * tex.width()) + x * Gdx.graphics.getWidth() / 4); float y0 = (float) (.5 * (Gdx.graphics.getHeight() - k * tex.height()) + y * Gdx.graphics.getHeight() / 5); tex.bind(); GfxUtils.fillQuad(x0, y0, 0, 0, x0 + k * tex.width(), y0 + k * tex.height(), 1, 1); } } } gl.glMatrixMode(GL10.GL_PROJECTION); gl.glPopMatrix(); gl.glMatrixMode(GL10.GL_MODELVIEW); gl.glPopMatrix(); gl.glEnable(GL10.GL_DEPTH_TEST); gl.glDisable(GL10.GL_TEXTURE_2D); } double getEntryX(int index) { return 1.5 * Math.sin((index + offset) * 2 * Math.PI / textures.length); } double getEntryY(int index) { double y = Math.cos((index + offset) * 2 * Math.PI / textures.length); return y;//2*Math.pow(.5*(y+1), 8)-1; } boolean getEntryBounds(int j, float[] bounds) { if (textures == null) return false; Texture tex = textures[j]; if (tex == null) return false; j += textures.length - cursor; double x = getEntryX(j); double y = getEntryY(j); float k = (float) (.75 + .125 * (y + 1)); k *= k; bounds[0] = (float) (.5 * (Gdx.graphics.getWidth() - k * tex.width()) + x * Gdx.graphics.getWidth() / 4); bounds[1] = (float) (.5 * (Gdx.graphics.getHeight() - k * tex.height()) + y * Gdx.graphics.getHeight() / 5); bounds[2] = bounds[0] + k * tex.width(); bounds[3] = bounds[1] + k * tex.height(); return true; } ShelfSpecification.Entry selectedEntry = null; float[] bounds = { 0, 0, 0, 0 }; public boolean clicked(int x, int y, int pointer, int button) { for (int i = 0; i < shelf.entries.size(); i++) if (getEntryBounds(i, bounds) && x > bounds[0] && x < bounds[2] && y > bounds[1] && y < bounds[3]) { if (cursor == i) { ShelfSpecification.Entry entry = selectedEntry(); if (entry != null) doEvent(entry); } else { offset += (i + textures.length - cursor) % textures.length; offset = offset > textures.length / 2 ? offset - textures.length : offset; cursor = i; } break; } return true; } public boolean typed(int key) { if (!active) return false; if (key == Input.Keys.ESCAPE) doEvent(null); else if (key == Input.Keys.LEFT) app.mainTask.right.doClick(); else if (key == Input.Keys.RIGHT) app.mainTask.left.doClick(); return false; } public boolean scrolled(int amount) { return false; } public Object objectAt(int x, int y) { return null; } public void useConfig(Map<String, Object> config) { } public void command(String command) { if (command.equals("left")) app.mainTask.right.doClick(); else if (command.equals("right")) app.mainTask.left.doClick(); else if (command.equals("ok")) { ShelfSpecification.Entry entry = selectedEntry(); if (entry != null) doEvent(entry); } } public boolean touched(int x, int y, int pointer, int button) { return true; } boolean dragging = false; double offsetOri; double voffset = 0; public boolean dragged(int fx, int fy, int tx, int ty, int pointer, int button) { if (textures != null && textures.length > 0) { if (dragging == false) { offsetOri = offset; voffset = 0; } dragging = true; voffset += .25 * (offsetOri + .003 * (tx - fx) - offset); offset = offsetOri + .003 * (tx - fx); } return true; } public boolean dropped(int fx, int fy, int tx, int ty, int pointer, int button) { if (dragging) { dragging = false; int dec = (int) Math.round(offset); cursor = (cursor - dec) % textures.length; cursor = cursor < 0 ? textures.length - (-cursor) % textures.length : cursor; offset -= dec; } return true; } public boolean grabbed(int x, int y, int pointer, int button) { return true; } void doEvent(Object object) { ActionEvent event = new ActionEvent(new Pair<Object, Object>(this, object), 0, null); synchronized (currentMonitor) { for (ActionListener listener : listeners) listener.actionPerformed(event); currentMonitor.notifyAll(); } } Object instanceMonitor = new Object(); Object currentMonitor = instanceMonitor; public Object getDefaultMonitor() { return instanceMonitor; } public Object getCurrentMonitor() { return currentMonitor; } public void setCurrentMonitor(Object o) { currentMonitor = o; } public Object waitForEvent() throws InterruptedException { synchronized (currentMonitor) { currentMonitor.wait(); } return selectedEntry; } List<ActionListener> listeners = new LinkedList<ActionListener>(); public void addActionListener(ActionListener listener) { listeners.add(listener); } public void removeActionListener(ActionListener listener) { listeners.remove(listener); } }