将图像放入JFace表单元格会导致图像的间隙出现在第一列中 [英] Putting an image in to a JFace table Cell is causing gap for image to appear in first column

问题描述

所以我遇到了一个问题，当我将图像添加到JFace表的任何列时，第一列的行为就像它有一个图像，文本缩进了该图像的大小。

So I have a problem, when I add an image to any column of a JFace table the first column also behaves like it has an image in and the text is indented by the size of that image.

这是一个屏幕截图，说明了生成它所需代码的观点。反正有没有阻止它发生，因为它真的在我的灯芯上？

Here's a screenshot illustrating my point with the code needed to produce it. Is there anyway to stop this from happening because it's really getting on my wick?

问候，

Glen x

< img src =https://i.stack.imgur.com/tV3pi.pngalt =在此输入图像说明>

package widgets;

import java.util.ArrayList;
import java.util.List;

import org.eclipse.jface.viewers.ArrayContentProvider;
import org.eclipse.jface.viewers.StyledCellLabelProvider;
import org.eclipse.jface.viewers.TableViewer;
import org.eclipse.jface.viewers.TableViewerColumn;
import org.eclipse.jface.viewers.ViewerCell;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.graphics.ImageData;
import org.eclipse.swt.graphics.PaletteData;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Display;

import org.eclipse.swt.widgets.Shell;

public class ComponentTest {

    private static Image image;

    public static void main(String[] args) {
        final Display display = new Display();
        final Shell shell = new Shell(display);
        shell.setLayout(new GridLayout(1, true));

        TableViewer viewer1 = getViewer(shell, true);
        TableViewer viewer2 = getViewer(shell, false);

        List<String> rows = new ArrayList<String>();
        rows.add("Row 1");
        rows.add("Row 2");

        viewer1.setInput(rows);
        viewer2.setInput(rows);

        shell.pack();
        shell.open();
        while (!shell.isDisposed()) {
            if (!display.readAndDispatch()) {
                display.sleep();
            }
        }
        display.dispose();
    }

    private static TableViewer getViewer(final Shell shell, boolean addImage) {
        TableViewer viewer = new TableViewer(shell, SWT.FULL_SELECTION
                | SWT.H_SCROLL | SWT.V_SCROLL | SWT.NONE);

        viewer.setContentProvider(ArrayContentProvider.getInstance());

        viewer.getTable().setLayoutData(
                new GridData(SWT.FILL, SWT.FILL, true, true));

        TableViewerColumn col = new TableViewerColumn(viewer, SWT.NONE);
        col.getColumn().setWidth(100);
        col.getColumn().setText("Text Column");
        col.setLabelProvider(new StyledCellLabelProvider() {
            @Override
            public void update(ViewerCell cell) {
                cell.setText((String) cell.getElement());
            }
        });

        col = new TableViewerColumn(viewer, SWT.NONE);
        col.getColumn().setWidth(100);
        col.getColumn().setText("Second Text Column");
        col.setLabelProvider(new StyledCellLabelProvider() {
            @Override
            public void update(ViewerCell cell) {
                cell.setText((String) cell.getElement());
            }
        });

        if (addImage) {
            col = new TableViewerColumn(viewer, SWT.NONE);
            col.getColumn().setWidth(100);
            col.getColumn().setText("Image Column");
            col.setLabelProvider(new StyledCellLabelProvider() {
                @Override
                public void update(ViewerCell cell) {
                    cell.setImage(getImage(shell.getDisplay()));
                }
            });
        }
        viewer.getTable().setHeaderVisible(true);

        return viewer;
    }

    // make a little green square
    private static Image getImage(Display display) {
        if (image == null) {
            PaletteData palette = new PaletteData(0xFF, 0xFF00, 0xFF0000);
            ImageData imageData = new ImageData(16, 16, 24, palette);

            for (int x = 0; x < 16; x++) {
                for (int y = 0; y < 16; y++) {
                    imageData.setPixel(x, y, 0xFF00);
                }
            }
            ;
            image = new Image(display, imageData);
        }
        return image;
    }
}

推荐答案

那使用Windows时，这是一个非常烦人的错误。您可以通过跳过第一列（不使用它）并将其宽度设置为零来使用脏修复。

That is a quite annoying bug when using Windows. You can use a dirty fix by skipping the first column (not using it) and setting its width to zero.

据我所知，这将引入一些小的使用MacOS时出现故障。

As far as I remember correctly, this will introduce some minor glitches when using MacOS.

这篇关于将图像放入JFace表单元格会导致图像的间隙出现在第一列中的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！