org.eclipse.swt.widgets.TableItem#getImage ( )源码实例Demo

@Override
public void handleEvent(final Event event) {
    if (event.index == colIndex) {
        if (event.type == SWT.EraseItem) {
            event.detail &= (Integer.MAX_VALUE ^ SWT.FOREGROUND);

        } else if (event.type == SWT.PaintItem) {
            final TableItem item = (TableItem) event.item;
            final Image img = item.getImage(colIndex);
            if (img != null) {
                final Rectangle size = img.getBounds();
                final Table tbl = (Table) event.widget;
                event.gc.drawImage(img, event.x + (tbl.getColumn(colIndex).getWidth() - size.width) / 2, event.y + (tbl.getItemHeight() - size.height) / 2);
            }
        }
    }
}
 

@Override
public void handleEvent(Event event) {
    if (event.index == colIndex) {
        if (event.type == SWT.EraseItem) {
            event.detail &= (Integer.MAX_VALUE ^ SWT.FOREGROUND);

        } else if (event.type == SWT.PaintItem) {
            final TableItem item = (TableItem) event.item;
            final Image img = item.getImage(colIndex);
            if (img != null) {
                final Rectangle size = img.getBounds();
                final Table tbl = (Table) event.widget;
                event.gc.drawImage(img, event.x + (tbl.getColumn(colIndex).getWidth() - size.width) / 2,
                        event.y + (tbl.getItemHeight() - size.height) / 2);
            }
        }
    }
}
 

public void handleEvent(Event event) {
	if (event.index == colIndex) {
		if (event.type == SWT.EraseItem) {
			event.detail &= (Integer.MAX_VALUE ^ SWT.FOREGROUND);
			
		} else if (event.type == SWT.PaintItem) {
			TableItem item = (TableItem) event.item;
			Image img = item.getImage(colIndex);
			if (img != null) {
				Rectangle size = img.getBounds();
				Table tbl = (Table) event.widget;
				event.gc.drawImage(img, event.x
						+ (tbl.getColumn(colIndex).getWidth() - size.width)
						/ 2, event.y + (tbl.getItemHeight() - size.height)
						/ 2);
			}
		}
	}
}
 

/**
 * {@inheritDoc}
 */
protected void doResetItem(Item item) {
	if (isWidgetDisposed()) {
		return;
	}
	TableItem tableItem = (TableItem) item;
	int columnCount = Math.max(1, tableCombo.getTable().getColumnCount());
	for (int i = 0; i < columnCount; i++) {
		tableItem.setText(i, ""); //$NON-NLS-1$
		if (tableItem.getImage(i) != null) {
			tableItem.setImage(i, null);
		}
	}
}
 

@Override
public void handleEvent(Event event) {
    TableItem item = (TableItem) event.item;

    // we promised to paint the table item's foreground
    GC gc = event.gc;
    Image image = item.getImage(event.index);
    if (image != null) {
        Rectangle imageBounds = item.getImageBounds(event.index);
        /*
         * The image bounds don't match the default image position.
         */
        if (IS_LINUX) {
            gc.drawImage(image, imageBounds.x + 1, imageBounds.y + 3);
        } else {
            gc.drawImage(image, imageBounds.x, imageBounds.y + 1);
        }
    }
    Object o = item.getData(Key.IS_DEFAULT_FG_COLOR);
    if (!(o instanceof Boolean) || !(Boolean) o) {
        gc.setForeground(item.getForeground(event.index));
    }
    gc.setFont(item.getFont(event.index));
    String text = item.getText(event.index);
    Rectangle textBounds = item.getTextBounds(event.index);
    /*
     * The text bounds don't match the default text position.
     */
    if (IS_LINUX) {
        gc.drawText(text, textBounds.x + 1, textBounds.y + 3, true);
    } else {
        gc.drawText(text, textBounds.x - 1, textBounds.y + 2, true);
    }
}
 

/**
 * {@inheritDoc}
 */
protected void doResetItem(Item item) {
	TableItem tableItem = (TableItem) item;
	int columnCount = Math.max(1, tableCombo.getTable().getColumnCount());
	for (int i = 0; i < columnCount; i++) {
		tableItem.setText(i, ""); //$NON-NLS-1$
		if (tableItem.getImage(i) != null) {
			tableItem.setImage(i, null);
		}
	}
}
 

/**
 * {@inheritDoc}
 */
protected void doResetItem(Item item) {
	TableItem tableItem = (TableItem) item;
	int columnCount = Math.max(1, tableCombo.getTable().getColumnCount());
	for (int i = 0; i < columnCount; i++) {
		tableItem.setText(i, ""); //$NON-NLS-1$
		if (tableItem.getImage(i) != null) {
			tableItem.setImage(i, null);
		}
	}
}
 

/**
 * {@inheritDoc}
 */
@Override
protected void doResetItem(Item item) {
    TableItem tableItem = (TableItem) item;
    int columnCount = Math.max(1, tableCombo.getTable().getColumnCount());
    for (int i = 0; i < columnCount; i++) {
        tableItem.setText(i, ""); //$NON-NLS-1$
        if (tableItem.getImage(i) != null) {
            tableItem.setImage(i, null);
        }
    }
}
 

/**
 * {@inheritDoc}
 */
@Override
public Point computeSize(final int wHint, final int hHint, final boolean changed) {
	checkWidget();

	int overallWidth = 0;
	int overallHeight = 0;
	final int borderWidth = hasBorder ? 2 : 0;

	// use user defined values if they are specified.
	if (wHint != SWT.DEFAULT && hHint != SWT.DEFAULT) {
		overallWidth = wHint;
		overallHeight = hHint;
	} else {
		final TableItem[] tableItems = table.getItems();

		final GC gc = new GC(text);
		final int spacer = gc.stringExtent(" ").x; //$NON-NLS-1$
		int maxTextWidth = gc.stringExtent(text.getText()).x;
		final int colIndex = getDisplayColumnIndex();
		int maxImageHeight = 0;
		int currTextWidth = 0;

		// calculate the maximum text width and image height.
		for (final TableItem tableItem : tableItems) {
			currTextWidth = gc.stringExtent(tableItem.getText(colIndex)).x;

			// take image into account if there is one for the tableitem.
			if (tableItem.getImage() != null) {
				currTextWidth += tableItem.getImage().getBounds().width;
				maxImageHeight = Math.max(tableItem.getImage().getBounds().height, maxImageHeight);
			}

			maxTextWidth = Math.max(currTextWidth, maxTextWidth);
		}

		gc.dispose();
		final Point textSize = text.computeSize(SWT.DEFAULT, SWT.DEFAULT, changed);
		final Point arrowSize = arrow.computeSize(SWT.DEFAULT, SWT.DEFAULT, changed);

		overallHeight = Math.max(textSize.y, arrowSize.y);
		overallHeight = Math.max(maxImageHeight, overallHeight);
		overallWidth = maxTextWidth + 2 * spacer + arrowSize.x + 2 * borderWidth;

		// use user specified if they were entered.
		if (wHint != SWT.DEFAULT) {
			overallWidth = wHint;
		}
		if (hHint != SWT.DEFAULT) {
			overallHeight = hHint;
		}
	}

	return new Point(overallWidth + 2 * borderWidth, overallHeight + 2 * borderWidth);
}