更新表格中的图像

问题描述 投票:0回答:2

我目前正在创建一个库存系统,用户可以在其中从库存清单集合中选择一个项目,右侧的图标将会更新。

到目前为止,我已经实现了一个ClickListener来从库存列表中获取当前选定的项目,并调用我创建的.getImage()方法来获取所选项目的图标。

我用过table.add(image);将图标添加到表中。但是,当图标添加到表中时,它会填充该空间,并在用户选择其他项目时向右创建另一列。这是问题所在。

当用户选择另一个项目而不是在右侧创建另一个列时,如何让图像区域更新?

这是目前的情况:https://imgur.com/a/O6SW8gi

我希望使用用户点击的最新项目更新剑的区域。

这是我的代码:

package com.sps.game.inventory;

import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.Input;
import com.badlogic.gdx.InputProcessor;
import com.badlogic.gdx.graphics.OrthographicCamera;
import com.badlogic.gdx.graphics.g2d.SpriteBatch;
import com.badlogic.gdx.scenes.scene2d.*;
import com.badlogic.gdx.scenes.scene2d.ui.*;

import com.badlogic.gdx.scenes.scene2d.utils.ClickListener;
import com.badlogic.gdx.utils.viewport.FitViewport;
import com.badlogic.gdx.utils.viewport.Viewport;
import com.sps.game.controller.InventoryController;
import com.sps.game.controller.PlayerController;

import java.util.ArrayList;

public class PlayerInventory {
    public Stage stage;
    public SpriteBatch sb;
    private Viewport viewport;

    private Skin skin = new Skin(Gdx.files.internal("core/assets/pixthulhuui/pixthulhu-ui.json"));

    private List<Item> inventory;
    private List<Image> itemImages;

    private InventoryController inventoryController;
    private InputProcessor oldInput;

    Table table = new Table(skin);



    public PlayerInventory(SpriteBatch sb, PlayerController playerController) {
        this.sb = sb;
        viewport = new FitViewport(Gdx.graphics.getWidth(), Gdx.graphics.getHeight(), new OrthographicCamera());
        stage = new Stage(viewport, sb);

        inventoryController = new InventoryController();
        inventory = inventoryController.getInventoryList();
       // itemImages = inventoryController.getImageList();
    }


    //THIS IS WHERE THE IMAGE IS ADDED

    private void formatting() {
        stage = new Stage();
        Label inventoryLabel = new Label("Inventory", skin);
        final Label imageLabel = new Label("Item", skin);

        table.setDebug(true);
        table.defaults();
        table.center();
        table.setFillParent(true);
        table.add(inventoryLabel);
        table.add(imageLabel);
        table.row();

        table.add(inventory); //need a way to get the current item selected
        inventory.addListener(new ClickListener() {
            public void clicked(InputEvent event, float x, float y) {
                Item clickedItem = inventory.getSelected();
                Image clickedImage = clickedItem.getImage();
                table.add(clickedImage);
                System.out.println(clickedItem.getName());
                }
            });



     //   stage.addActor(itemImages);
        stage.addActor(table);
    }





    public void setInput() {
        oldInput = Gdx.input.getInputProcessor(); //Get the old input from the user.
        Gdx.input.setInputProcessor(stage);       //Set the input to now work on the inventory.
    }

    public void update() {
        if (Gdx.input.isKeyPressed(Input.Keys.I) && oldInput == null) {
            formatting();
            setInput();
        }

        if (Gdx.input.isKeyPressed(Input.Keys.O) && oldInput != null) {
            stage.dispose();
            Gdx.input.setInputProcessor(oldInput);
            oldInput = null;
        }
    }

    public void dispose() {
        stage.dispose();
    }

}

图像添加在格式化方法()中 -

             inventory.addListener(new ClickListener() {
             public void clicked(InputEvent event, float x, float y) {
                Item clickedItem = inventory.getSelected();
                Image clickedImage = clickedItem.getImage();
                table.add(clickedImage);
                System.out.println(clickedItem.getName());
                }
java libgdx game-development
2个回答
1
投票

我发现了这个问题,看看LibGDX Wiki Table - Adding Cells,看来你正在使用的add()方法不能替换单元格中的前一个actor,它只会在行中添加另一个。相反,您应该将显示的图像与List区分开来

public class PlayerInventory {

    [..........................]

    Item clickedItem; // This will save your clicked item
    Image clickedImage; // This will save your clicked image;

    [..........................]

    inventory.addListener(new ClickListener() {
         public void clicked(InputEvent event, float x, float y) {
                if (clickedItem == null && clickedImage == null) {
                    clickedItem = inventory.getSelected(); // This line changed
                    clickedImage = clickedItem.getImage(); // This line changed
                    table.add(clickedImage);
                } else {
                    clickedItem = inventory.getSelected(); // This line changed
                    clickedImage = clickedItem.getImage(); // This line changed
                }

                System.out.println(clickedItem.getName());
            }
}

如果之前没有图像,这将添加图像,如果之前有图像,则替换图像。希望这可以帮助!


0
投票

解决了。每次单击屏幕时都不应使用table.add(clickedImage)。 add()创建一个新单元格。相反,在初始布局期间只添加一次占位符Image,并保留对它的引用。在我的ClickListener中,我使用clickedImage.setDrawable()来改变显示的图像。

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