Java tutorial
package com.aia.hichef.ui.n; /******************************************************************************* * Copyright 2011 See AUTHORS file. * * 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. ******************************************************************************/ import com.badlogic.gdx.graphics.Color; import com.badlogic.gdx.graphics.g2d.Batch; import com.badlogic.gdx.graphics.g2d.BitmapFont.TextBounds; import com.badlogic.gdx.graphics.g2d.BitmapFontCache; import com.badlogic.gdx.math.Vector2; 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.Touchable; import com.badlogic.gdx.scenes.scene2d.ui.Skin; import com.badlogic.gdx.scenes.scene2d.ui.Table; import com.badlogic.gdx.scenes.scene2d.ui.Window.WindowStyle; import com.badlogic.gdx.scenes.scene2d.utils.Align; /** * A table that can be dragged and act as a modal window. The top padding is * used as the window's title height. * <p> * The preferred size of a window is the preferred size of the title text and * the children as laid out by the table. After adding children to the window, * it can be convenient to call {@link #pack()} to size the window to the size * of the children. * * @author Nathan Sweet */ public class MyWindow extends Table { static private final Vector2 tmpPosition = new Vector2(); static private final Vector2 tmpSize = new Vector2(); static private final int MOVE = 1 << 5; private WindowStyle style; private String title; private BitmapFontCache titleCache; boolean isMovable = true, isModal, isResizable; int resizeBorder = 8; boolean dragging; private int titleAlignment = Align.center; boolean keepWithinStage = true; Table buttonTable; public MyWindow(String title, Skin skin) { this(title, skin.get(WindowStyle.class)); setSkin(skin); } public MyWindow(String title, Skin skin, String styleName) { this(title, skin.get(styleName, WindowStyle.class)); setSkin(skin); } public MyWindow(String title, WindowStyle style) { if (title == null) throw new IllegalArgumentException("title cannot be null."); this.title = title; setTouchable(Touchable.enabled); setClip(true); setStyle(style); setWidth(150); setHeight(150); setTitle(title); setHeight(100); buttonTable = new Table(); addActor(buttonTable); addCaptureListener(new InputListener() { public boolean touchDown(InputEvent event, float x, float y, int pointer, int button) { toFront(); return false; } }); addListener(new InputListener() { int edge; float startX, startY, lastX, lastY; public boolean touchDown(InputEvent event, float x, float y, int pointer, int button) { if (button == 0) { int border = resizeBorder; float width = getWidth(), height = getHeight(); edge = 0; if (isResizable) { if (x < border) edge |= Align.left; if (x > width - border) edge |= Align.right; if (y < border) edge |= Align.bottom; if (y > height - border) edge |= Align.top; if (edge != 0) border += 25; if (x < border) edge |= Align.left; if (x > width - border) edge |= Align.right; if (y < border) edge |= Align.bottom; if (y > height - border) edge |= Align.top; } if (isMovable && edge == 0 && y <= height && y >= height - getPadTop() && x >= 0 && x <= width) edge = MOVE; dragging = edge != 0; startX = x; startY = y; lastX = x; lastY = y; } return edge != 0 || isModal; } public void touchUp(InputEvent event, float x, float y, int pointer, int button) { dragging = false; } public void touchDragged(InputEvent event, float x, float y, int pointer) { if (!dragging) return; float width = getWidth(), height = getHeight(); float windowX = getX(), windowY = getY(); float minWidth = getMinWidth(), maxWidth = getMaxWidth(); float minHeight = getMinHeight(), maxHeight = getMaxHeight(); Stage stage = getStage(); boolean clampPosition = keepWithinStage && getParent() == stage.getRoot(); if ((edge & MOVE) != 0) { float amountX = x - startX, amountY = y - startY; windowX += amountX; windowY += amountY; } if ((edge & Align.left) != 0) { float amountX = x - startX; if (width - amountX < minWidth) amountX = -(minWidth - width); if (clampPosition && windowX + amountX < 0) amountX = -windowX; width -= amountX; windowX += amountX; } if ((edge & Align.bottom) != 0) { float amountY = y - startY; if (height - amountY < minHeight) amountY = -(minHeight - height); if (clampPosition && windowY + amountY < 0) amountY = -windowY; height -= amountY; windowY += amountY; } if ((edge & Align.right) != 0) { float amountX = x - lastX; if (width + amountX < minWidth) amountX = minWidth - width; if (clampPosition && windowX + width + amountX > stage.getWidth()) amountX = stage.getWidth() - windowX - width; width += amountX; } if ((edge & Align.top) != 0) { float amountY = y - lastY; if (height + amountY < minHeight) amountY = minHeight - height; if (clampPosition && windowY + height + amountY > stage.getHeight()) amountY = stage.getHeight() - windowY - height; height += amountY; } lastX = x; lastY = y; setBounds(Math.round(windowX), Math.round(windowY), Math.round(width), Math.round(height)); } public boolean mouseMoved(InputEvent event, float x, float y) { return isModal; } public boolean scrolled(InputEvent event, float x, float y, int amount) { return isModal; } public boolean keyDown(InputEvent event, int keycode) { return isModal; } public boolean keyUp(InputEvent event, int keycode) { return isModal; } public boolean keyTyped(InputEvent event, char character) { return isModal; } }); } public void setStyle(WindowStyle style) { if (style == null) throw new IllegalArgumentException("style cannot be null."); this.style = style; setBackground(style.background); titleCache = new BitmapFontCache(style.titleFont); titleCache.setColor(style.titleFontColor); if (title != null) setTitle(title); invalidateHierarchy(); } /** * Returns the window's style. Modifying the returned style may not have an * effect until {@link #setStyle(WindowStyle)} is called. */ public WindowStyle getStyle() { return style; } void keepWithinStage() { if (!keepWithinStage) return; Stage stage = getStage(); if (getParent() == stage.getRoot()) { float parentWidth = stage.getWidth(); float parentHeight = stage.getHeight(); if (getX() < 0) setX(0); if (getRight() > parentWidth) setX(parentWidth - getWidth()); if (getY() < 0) setY(0); if (getTop() > parentHeight) setY(parentHeight - getHeight()); } } public void draw(Batch batch, float parentAlpha) { keepWithinStage(); if (style.stageBackground != null) { Color color = getColor(); batch.setColor(color.r, color.g, color.b, color.a * parentAlpha); Stage stage = getStage(); stageToLocalCoordinates(/* in/out */tmpPosition.set(0, 0)); stageToLocalCoordinates(/* in/out */tmpSize.set(stage.getWidth(), stage.getHeight())); style.stageBackground.draw(batch, getX() + tmpPosition.x, getY() + tmpPosition.y, getX() + tmpSize.x, getY() + tmpSize.y); } super.draw(batch, parentAlpha); } protected void drawBackground(Batch batch, float parentAlpha, float x, float y) { float width = getWidth(), height = getHeight(); float padTop = getPadTop(); super.drawBackground(batch, parentAlpha, x, y); // Draw button table. buttonTable.getColor().a = getColor().a; buttonTable.pack(); buttonTable.setPosition(width - buttonTable.getWidth(), Math.min(height - padTop, height - buttonTable.getHeight())); buttonTable.draw(batch, parentAlpha); // Draw the title without the batch transformed or clipping applied. y += height; TextBounds bounds = titleCache.getBounds(); if ((titleAlignment & Align.left) != 0) x += getPadLeft(); else if ((titleAlignment & Align.right) != 0) x += width - bounds.width - getPadRight(); else x += (width - bounds.width) / 2; if ((titleAlignment & Align.top) == 0) { if ((titleAlignment & Align.bottom) != 0) y -= padTop - bounds.height; else y -= (padTop - bounds.height) / 2; } titleCache.setColors(Color.tmp.set(getColor()).mul(style.titleFontColor)); titleCache.setPosition((int) x, (int) y); titleCache.draw(batch, parentAlpha); } public Actor hit(float x, float y, boolean touchable) { Actor hit = super.hit(x, y, touchable); if (hit == null && isModal && (!touchable || getTouchable() == Touchable.enabled)) return this; return hit; } public void setTitle(String title) { this.title = title; titleCache.setMultiLineText(title, 0, 0); } public String getTitle() { return title; } /** * @param titleAlignment * {@link Align} */ public void setTitleAlignment(int titleAlignment) { this.titleAlignment = titleAlignment; } public boolean isMovable() { return isMovable; } public void setMovable(boolean isMovable) { this.isMovable = isMovable; } public boolean isModal() { return isModal; } public void setModal(boolean isModal) { this.isModal = isModal; } public void setKeepWithinStage(boolean keepWithinStage) { this.keepWithinStage = keepWithinStage; } public boolean isResizable() { return isResizable; } public void setResizable(boolean isResizable) { this.isResizable = isResizable; } public void setResizeBorder(int resizeBorder) { this.resizeBorder = resizeBorder; } public boolean isDragging() { return dragging; } public float getTitleWidth() { return titleCache.getBounds().width; } public float getPrefWidth() { return Math.max(super.getPrefWidth(), getTitleWidth() + getPadLeft() + getPadRight()); } public Table getButtonTable() { return buttonTable; } }