Java tutorial
/******************************************************************************* * Copyright 2014 Rafael Garcia Moreno. * * 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.bladecoder.engine.ui; import java.io.IOException; import java.text.SimpleDateFormat; import java.util.ArrayList; import java.util.Collections; import java.util.Date; import java.util.List; import com.badlogic.gdx.Gdx; import com.badlogic.gdx.Input; import com.badlogic.gdx.ScreenAdapter; import com.badlogic.gdx.Input.Keys; import com.badlogic.gdx.files.FileHandle; import com.badlogic.gdx.graphics.GL20; import com.badlogic.gdx.graphics.Texture; import com.badlogic.gdx.graphics.Texture.TextureFilter; import com.badlogic.gdx.graphics.g2d.TextureRegion; import com.badlogic.gdx.scenes.scene2d.Actor; import com.badlogic.gdx.scenes.scene2d.InputEvent; import com.badlogic.gdx.scenes.scene2d.InputListener; import com.badlogic.gdx.scenes.scene2d.Stage; import com.badlogic.gdx.scenes.scene2d.ui.Button; import com.badlogic.gdx.scenes.scene2d.ui.Button.ButtonStyle; import com.badlogic.gdx.scenes.scene2d.ui.TextButton.TextButtonStyle; import com.badlogic.gdx.scenes.scene2d.ui.Container; import com.badlogic.gdx.scenes.scene2d.ui.Dialog; import com.badlogic.gdx.scenes.scene2d.ui.Image; import com.badlogic.gdx.scenes.scene2d.ui.Label; import com.badlogic.gdx.scenes.scene2d.ui.Skin; import com.badlogic.gdx.scenes.scene2d.ui.Table; import com.badlogic.gdx.scenes.scene2d.utils.ClickListener; import com.badlogic.gdx.scenes.scene2d.utils.Drawable; import com.badlogic.gdx.scenes.scene2d.utils.TextureRegionDrawable; import com.badlogic.gdx.utils.Align; import com.badlogic.gdx.utils.viewport.ScreenViewport; import com.bladecoder.engine.assets.EngineAssetManager; import com.bladecoder.engine.i18n.I18N; import com.bladecoder.engine.model.World; import com.bladecoder.engine.ui.UI.Screens; import com.bladecoder.engine.util.DPIUtils; import com.bladecoder.engine.util.EngineLogger; public class LoadSaveScreen extends ScreenAdapter implements BladeScreen { private static final int ROW_SLOTS = 3; private static final int COL_SLOTS = 2; private UI ui; private Stage stage; private Texture bgTexFile = null; private boolean loadScreenMode = true; private int slotWidth = 0; private int slotHeight = 0; // texture list for final dispose private final ArrayList<Texture> textureList = new ArrayList<Texture>(); private Pointer pointer; public LoadSaveScreen() { } @Override public void render(float delta) { Gdx.gl.glClearColor(0, 0, 0, 1); Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT); stage.act(delta); stage.draw(); } @Override public void resize(int width, int height) { stage.getViewport().update(width, height, true); pointer.resize(); } @Override public void dispose() { stage.dispose(); stage = null; if (bgTexFile != null) { bgTexFile.dispose(); } bgTexFile = null; for (Texture t : textureList) t.dispose(); } @Override public void show() { float size = DPIUtils.getPrefButtonSize(); float pad = DPIUtils.getMarginSize(); final Skin skin = ui.getSkin(); final World world = World.getInstance(); // loadScreenMode = ui.getScreen(Screens.LOAD_GAME_SCREEN) == this; loadScreenMode = world.getCurrentScene() == null; stage = new Stage(new ScreenViewport()); slotWidth = (int) (stage.getViewport().getWorldWidth() / (ROW_SLOTS + 1) - 2 * pad); slotHeight = (int) (slotWidth * stage.getViewport().getScreenHeight() / stage.getViewport().getScreenWidth()); LoadSaveScreenStyle style = skin.get(LoadSaveScreenStyle.class); Drawable bg = style.background; if (bg == null && style.bgFile != null) { bgTexFile = new Texture(EngineAssetManager.getInstance().getResAsset(style.bgFile)); bgTexFile.setFilter(TextureFilter.Linear, TextureFilter.Linear); bg = new TextureRegionDrawable(new TextureRegion(bgTexFile)); } Table table = new Table(skin); table.setFillParent(true); table.center(); table.pad(pad); Label title = new Label(loadScreenMode ? I18N.getString("ui.load") : I18N.getString("ui.save"), skin, "title"); Button back = new Button(skin, "back"); back.addListener(new ClickListener() { public void clicked(InputEvent event, float x, float y) { ui.setCurrentScreen(Screens.MENU_SCREEN); } }); Table header = new Table(); // header.padBottom(pad); Container<Button> cont = new Container<Button>(back); cont.size(size); header.add(cont); header.add(title).fillX().expandX().left(); table.add(header).fillX().expandX().left(); if (bg != null) table.setBackground(bg); table.addListener(new InputListener() { @Override public boolean keyUp(InputEvent event, int keycode) { if (keycode == Input.Keys.ESCAPE || keycode == Input.Keys.BACK) if (world.getCurrentScene() != null) ui.setCurrentScreen(Screens.SCENE_SCREEN); return true; } }); final PagedScrollPane scroll = new PagedScrollPane(); scroll.setFlingTime(0.1f); scroll.setPageSpacing(25); Table slots = new Table().pad(pad); slots.defaults().pad(pad).size(slotWidth + pad, slotHeight + pad * 2).top(); int c = 0; // Add "new slot" slot for save screen if (!loadScreenMode) { slots.add(getSlotButton(Long.toString(new Date().getTime()))).fill().expand(); c++; } final List<String> sl = getSlots(); Collections.sort(sl); for (int j = sl.size() - 1; j >= 0; j--) { String s = sl.get(j); if (c % ROW_SLOTS == 0 && c % (ROW_SLOTS * COL_SLOTS) != 0) slots.row(); if (c != 0 && c % (ROW_SLOTS * COL_SLOTS) == 0) { scroll.addPage(slots); slots = new Table().pad(pad); slots.defaults().pad(pad).size(slotWidth + pad, slotHeight + pad * 2).top(); } Button removeButton = new Button(skin, "delete_game"); removeButton.setName(s); removeButton.addListener(removeClickListener); Container<Button> container = new Container<Button>(removeButton); container.size(DPIUtils.getPrefButtonSize() * .75f); container.align(Align.topRight); slots.stack(getSlotButton(s), container).fill().expand(); c++; } // Add last page if (slots.getCells().size > 0) scroll.addPage(slots); table.row(); if (loadScreenMode && sl.size() == 0) { Label lbl = new Label(I18N.getString("ui.noSavedGames"), skin, "title"); lbl.setAlignment(Align.center); table.add(lbl).expand().fill(); } else { table.add(scroll).expand().fill(); } table.pack(); stage.setKeyboardFocus(table); stage.addActor(table); pointer = new Pointer(ui.getSkin()); stage.addActor(pointer); Gdx.input.setInputProcessor(stage); } private boolean slotExists(String slot) { String filename = slot + World.GAMESTATE_EXT; return World.getInstance().savedGameExists(filename); } /** * Creates a button to represent one slot * * @param slot * @return The button to use for one slot */ private Button getSlotButton(String slot) { final Skin skin = ui.getSkin(); final Button button = new Button(new ButtonStyle()); final ButtonStyle style = button.getStyle(); style.up = style.down = skin.getDrawable("black"); String textLabel = I18N.getString("ui.newSlot"); button.setSize(slotWidth, slotHeight); if (slotExists(slot)) { button.add(getScreenshot(slot)).maxSize(slotWidth * .95f, slotHeight * .95f); try { long l = Long.parseLong(slot); Date d = new Date(l); textLabel = (new SimpleDateFormat()).format(d); } catch (Exception e) { textLabel = slot; } button.addListener(loadClickListener); } else { Image fg = new Image(skin.getDrawable("plus")); button.add(fg).maxSize(slotHeight / 2, slotHeight / 2); button.addListener(saveClickListener); } button.row(); Label label = new Label(textLabel, skin); label.setAlignment(Align.center); button.add(label).fillX(); button.setName(slot); return button; } private List<String> getSlots() { final List<String> al = new ArrayList<String>(); FileHandle[] list = EngineAssetManager.getInstance().getUserFolder().list(); for (FileHandle file : list) if (file.name().endsWith(World.GAMESTATE_EXT)) { String name = file.name().substring(0, file.name().indexOf(World.GAMESTATE_EXT)); if (!name.equals("default")) al.add(name); } // Add savedgames in '/tests' folder if (EngineLogger.debugMode() && loadScreenMode) { String[] list2 = EngineAssetManager.getInstance().listAssetFiles("/tests"); for (String file : list2) if (file.endsWith(World.GAMESTATE_EXT)) { String name = file.substring(0, file.indexOf(World.GAMESTATE_EXT)); al.add(name); } } return al; } private Image getScreenshot(String slot) { String filename = slot + World.GAMESTATE_EXT + ".png"; FileHandle savedFile = null; if (EngineAssetManager.getInstance().getUserFile(filename).exists()) savedFile = EngineAssetManager.getInstance().getUserFile(filename); else savedFile = EngineAssetManager.getInstance().getAsset("tests/" + filename); Texture t = new Texture(savedFile); // add to the list for proper dispose when hide the screen textureList.add(t); return new Image(t); } private ClickListener loadClickListener = new ClickListener() { @Override public void clicked(InputEvent event, float x, float y) { final World world = World.getInstance(); final String filename = event.getListenerActor().getName() + World.GAMESTATE_EXT; if (world.savedGameExists()) { Dialog d = new Dialog("", ui.getSkin()) { protected void result(Object object) { if (((Boolean) object).booleanValue()) { try { // if (loadScreenMode) { world.loadGameState(filename); ui.setCurrentScreen(Screens.SCENE_SCREEN); } catch (IOException e) { EngineLogger.error(e.getMessage()); } } } }; d.pad(DPIUtils.getMarginSize()); d.getButtonTable().padTop(DPIUtils.getMarginSize()); d.getButtonTable().defaults().padLeft(DPIUtils.getMarginSize()).padRight(DPIUtils.getMarginSize()); Label l = new Label(I18N.getString("ui.override_load"), ui.getSkin(), "ui-dialog"); l.setWrap(true); l.setAlignment(Align.center); d.getContentTable().add(l).prefWidth(Gdx.graphics.getWidth() * .7f); d.button(I18N.getString("ui.yes"), true, ui.getSkin().get("ui-dialog", TextButtonStyle.class)); d.button(I18N.getString("ui.no"), false, ui.getSkin().get("ui-dialog", TextButtonStyle.class)); d.key(Keys.ENTER, true).key(Keys.ESCAPE, false); d.show(stage); } else { try { // if (loadScreenMode) { world.loadGameState(filename); ui.setCurrentScreen(Screens.SCENE_SCREEN); } catch (IOException e) { EngineLogger.error(e.getMessage()); } } } }; private ClickListener removeClickListener = new ClickListener() { @Override public void clicked(InputEvent event, float x, float y) { final Actor listenerActor = event.getListenerActor(); Dialog d = new Dialog("", ui.getSkin()) { protected void result(Object object) { if (((Boolean) object).booleanValue()) { final World world = World.getInstance(); final String filename = listenerActor.getName() + World.GAMESTATE_EXT; try { world.removeGameState(filename); listenerActor.getParent().getParent().getParent() .removeActor(listenerActor.getParent().getParent()); } catch (IOException e) { EngineLogger.error(e.getMessage()); } } } }; d.pad(DPIUtils.getMarginSize()); d.getButtonTable().padTop(DPIUtils.getMarginSize()); d.getButtonTable().defaults().padLeft(DPIUtils.getMarginSize()).padRight(DPIUtils.getMarginSize()); Label l = new Label(I18N.getString("ui.remove"), ui.getSkin(), "ui-dialog"); l.setWrap(true); l.setAlignment(Align.center); d.getContentTable().add(l).prefWidth(Gdx.graphics.getWidth() * .7f); d.button(I18N.getString("ui.yes"), true, ui.getSkin().get("ui-dialog", TextButtonStyle.class)); d.button(I18N.getString("ui.no"), false, ui.getSkin().get("ui-dialog", TextButtonStyle.class)); d.key(Keys.ENTER, true).key(Keys.ESCAPE, false); d.show(stage); } }; private ClickListener saveClickListener = new ClickListener() { @Override public void clicked(InputEvent event, float x, float y) { final World world = World.getInstance(); final String filename = event.getListenerActor().getName() + World.GAMESTATE_EXT; try { world.saveGameState(filename); ui.setCurrentScreen(Screens.SCENE_SCREEN); } catch (IOException e) { EngineLogger.error(e.getMessage()); } } }; @Override public void hide() { dispose(); } @Override public void setUI(UI ui) { this.ui = ui; } /** * The style for the MenuScreen */ public static class LoadSaveScreenStyle { /** * Optional. */ public Drawable background; /** * if 'bg' not specified try to load the bgFile */ public String bgFile; public String textButtonStyle; public LoadSaveScreenStyle() { } public LoadSaveScreenStyle(LoadSaveScreenStyle style) { background = style.background; bgFile = style.bgFile; textButtonStyle = style.textButtonStyle; } } }