Moves many of the GUI tasks for CalibrateInputScreen to their own class.
I plan on reusing them in JoystickPreviewScreen.
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Markil3
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library/src/main/java/markil3/controller/GUIUtils.java
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library/src/main/java/markil3/controller/GUIUtils.java
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package markil3.controller;
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import com.jme3.asset.AssetManager;
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import com.jme3.collision.CollisionResult;
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import com.jme3.collision.CollisionResults;
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import com.jme3.font.BitmapFont;
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import com.jme3.font.BitmapText;
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import com.jme3.font.Rectangle;
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import com.jme3.material.Material;
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import com.jme3.math.ColorRGBA;
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import com.jme3.math.Ray;
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import com.jme3.math.Vector2f;
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import com.jme3.math.Vector3f;
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import com.jme3.scene.Geometry;
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import com.jme3.scene.Node;
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import com.jme3.scene.Spatial;
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import com.jme3.scene.shape.Quad;
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/**
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* A collection of utility methods for the screens used here.
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* @author Markil 3
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* @version 1.1
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*/
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public class GUIUtils
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{
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/**
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* The color that a button takes on when the mouse is down on it. Feel
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* free to change it to suit your needs.
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*/
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static ColorRGBA BUTTON_COLOR_ON = new ColorRGBA(0F, 0.1F, 0F, 1F);
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/**
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* The default color that a button. Feel free to change it to suit your
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* needs.
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*/
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static ColorRGBA BUTTON_COLOR_OFF = new ColorRGBA(0F, 0.75F, 0.25F, 1F);
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private static final String BUTTON_ID = "button";
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/**
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* Creates a button. This button will have special user data fields that
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* can be detected by {@link #handleButtonPress(Node, Vector2f, boolean)}
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* to trigger events.
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* @param assets - The application asset manager.
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* @param guiFont - The font to use for the button.
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* @param id - The button ID. This is used to identify which button was
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* pressed later on.
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* @param content - The text that will display in the button.
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* @return A node containing the button elements.
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*/
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public static Node createButton(AssetManager assets, BitmapFont guiFont,
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String id, String content)
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{
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BitmapText buttonText;
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Geometry buttonBackground;
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Node button = new Node();
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buttonText = guiFont.createLabel(content);
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buttonText.setUserData(BUTTON_ID, id);
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buttonText.setBox(new Rectangle(0, 0, buttonText.getLineWidth(),
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buttonText.getLineHeight()));
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buttonText.setAlignment(BitmapFont.Align.Center);
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buttonText.setVerticalAlignment(BitmapFont.VAlign.Center);
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buttonBackground = new Geometry("button-" + id,
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new Quad(buttonText.getLineWidth() + 10,
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buttonText.getHeight() + 5));
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buttonBackground.setMaterial(
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new Material(assets, "Common/MatDefs/Misc/Unshaded.j3md"));
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buttonBackground.getMaterial().setColor("Color", BUTTON_COLOR_OFF);
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buttonBackground.setUserData(BUTTON_ID, id);
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buttonBackground
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.setLocalTranslation(-2.5F, -buttonText.getLineHeight() - 2.5F,
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0);
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button.setUserData(BUTTON_ID, id);
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button.attachChild(buttonBackground);
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button.attachChild(buttonText);
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return button;
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}
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/**
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* Call this method from a mouse listener to search the provided node for
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* any buttons created with
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* {@link #createButton(AssetManager, BitmapFont, String, String)} and
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* returns their ID.
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* @param gui - The GUI to search.
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* @param cursor - The position of the mouse cursor.
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* @param isPressed - Whether or not the cursor is pressed. This will
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* change how the button is displayed.
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* @return The ID of the button that was clicked, or null if none were
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* clicked.
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*/
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public static String handleButtonPress(Node gui, Vector2f cursor,
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boolean isPressed)
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{
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final String KEY_CURRENT = "currentButton";
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CollisionResults results;
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Ray ray;
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Geometry button;
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String buttonId = null;
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/*
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* We generally mark buttons on mouse down, and trigger that same
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* button on release. If we haven't even marked a button by the time
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* we release the mouse, we just won't bother.
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*/
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if (!isPressed)
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{
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button = gui.getUserData(KEY_CURRENT);
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if (button == null)
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{
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return null;
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}
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}
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results = new CollisionResults();
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ray = new Ray(new Vector3f(cursor.x, cursor.y, 0),
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new Vector3f(cursor.x, cursor.y, 1));
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gui.collideWith(ray, results);
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for (CollisionResult result : results)
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{
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button = result.getGeometry();
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buttonId = button.getUserData(BUTTON_ID);
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if (buttonId != null)
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{
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if (isPressed)
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{
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/*
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* Trigger the press graphic
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*/
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button.getMaterial().setColor("Color", BUTTON_COLOR_ON);
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gui.setUserData(KEY_CURRENT, button);
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break;
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}
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else
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{
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/*
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* If the button we released isn't the same as the button
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* we originally pressed, don't trigger either.
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*/
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button = gui.getUserData(KEY_CURRENT);
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if (button != null)
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{
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if (button.getUserData(BUTTON_ID).equals(buttonId))
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{
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break;
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}
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else
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{
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buttonId = null;
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}
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}
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}
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}
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}
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if (!isPressed)
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{
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/*
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* Make sure the originally-clicked button was reset.
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*/
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button = gui.getUserData(KEY_CURRENT);
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if (button != null)
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{
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button.getMaterial().setColor("Color", BUTTON_COLOR_OFF);
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gui.setUserData(KEY_CURRENT, null);
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}
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}
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return buttonId;
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}
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/**
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* Aligns the contents in a container so that all {@link BitmapText} and
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* button elements will align in a column.
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* @param cont - The container to align.
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* @param width - The width of the screen.
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* @param height - The height of the screen.
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* @return The total height of the container. This is useful in
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* positioning the container itself.
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*/
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public static float alignContainer(Node cont, int width, int height)
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{
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float totalHeight = 0;
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for (Spatial node : cont.getChildren())
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{
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if (node instanceof BitmapText)
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{
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node.setLocalTranslation(
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-((BitmapText) node).getLineWidth() / 2F, -totalHeight,
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0);
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totalHeight += ((BitmapText) node).getHeight();
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}
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else if (node.getUserData(BUTTON_ID) != null)
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{
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Quad quad = ((Quad) ((Geometry) ((Node) node).getChild(0))
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.getMesh());
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node.setLocalTranslation(-quad.getWidth() / 2F,
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-totalHeight - 10, 0);
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totalHeight += quad.getHeight() + 10;
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}
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}
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return totalHeight;
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}
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}
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