Question

点击按钮打开 FileDialog Box ，然后选择要在特定标签上显示的任何图片。

我尝试使用Label控件中的所选图像设置绝对路径或相对路径但没有适当的动态工作。

所以请帮我解决问题。

Answer 1

Java SWT加载并调整图像以动态查看或编辑

单击按钮打开FileDialog Box并选择要在特定标签上显示的任何图像。

ImageLoader 类用于从文件或流中加载图像并将图像保存到文件或流中

ImageData 类是与设备无关的图像描述

SWT的图像类可用于在GUI中显示图像

package rcp_demo.Editor;

import org.eclipse.swt.widgets.FileDialog;
import org.eclipse.swt.custom.CLabel;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.graphics.ImageData;
import org.eclipse.swt.graphics.ImageLoader;


public class ProductEditor extends EditorPart {

        public static final  String ID="rcp_demo.Editor.product";
        private Text text;
        private CLabel lbl_image_text;

        private static final String[] FILTER_NAMES = {
        "Images(*.jpg)","Images(*.jpeg)","Images(*.png)","All Files (*.*)"};

        // These filter extensions are used to filter which files are displayed.
        private static final String[] FILTER_EXTS = { "*.jpg", "*.jpeg", "*.png", "*.*"};

    public void createPartControl(final Composite parent) {

        parent.setLayout(null);
        //Layout with absolute positioning components. 

        text = new Text(parent, SWT.BORDER);
        text.setBounds(25, 57, 169, 19);

        Button btnOpen = new Button(parent, SWT.NONE);
        btnOpen.setText("open");
        btnOpen.addSelectionListener(new SelectionAdapter() {
            @Override
        public void widgetSelected(SelectionEvent e) {

            FileDialog dialog = new FileDialog(PlatformUI.getWorkbench().getActiveWorkbenchWindow().getShell(), SWT.OPEN);
            dialog.setFilterNames(FILTER_NAMES);
            dialog.setFilterExtensions(FILTER_EXTS);
            String result = dialog.open();
            if(result!=null)
               {
                   text.setText(result);
                   Image image=SWTResourceManager.getImage(result);
                   ImageData imgData = image.getImageData();
                   imgData=imgData.scaledTo(200, 200);

                   ImageLoader imageLoader = new ImageLoader();
                   imageLoader.data = new ImageData[] {imgData};
                   imageLoader.save(result, SWT.IMAGE_COPY);

                   System.out.println(imgData.width+"....."+imgData.height);
                   lbl_image_text.setBounds(25,88,imgData.width+10,imgData.height+10);
                   //Image size set to Label
                   //lbl_image_text.setBounds(25,88,image.getBounds().width+10,image.getBounds().height+10);
                   lbl_image_text.setImage(SWTResourceManager.getImage(result));
               }
        }
    });
    btnOpen.setText("open");
    lbl_image_text = new CLabel(parent, SWT.Resize);
    }
}

CLabel 类提供了Label类的一些高级功能。该类可以同时显示其文本标签和图像标签。

    lbl_image_text.setText("Welcome");
    lbl_image_text.setImage(SWTResourceManager.getImage("Image Path"));

如何使用rcp和swt / jface组件

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