Java TextLayout.dispose方法代码示例

import org.eclipse.swt.graphics.TextLayout; //导入方法依赖的package包/类
public static String shortenText(final GC gc, String text, final int width, final String ellipses) {

		if (gc.textExtent(text, 0).x <= width) {
			return text;
		}

		final int ellipseWidth = gc.textExtent(ellipses, 0).x;
		final int length = text.length();
		final TextLayout layout = new TextLayout(gc.getDevice());
		layout.setText(text);

		int end = layout.getPreviousOffset(length, SWT.MOVEMENT_CLUSTER);
		while (end > 0) {
			text = text.substring(0, end);
			final int l = gc.textExtent(text, 0).x;
			if (l + ellipseWidth <= width) {
				break;
			}
			end = layout.getPreviousOffset(end, SWT.MOVEMENT_CLUSTER);
		}
		layout.dispose();
		return end == 0 ? text.substring(0, 1) : text + ellipses;
	}
 

import org.eclipse.swt.graphics.TextLayout; //导入方法依赖的package包/类
public int getPreferredHeight(LayerCell cell, GC gc, IConfigRegistry configRegistry) {
	if (innerTagFactory == null) {
		innerTagFactory = new XliffInnerTagFactory(placeHolderBuilder);
	}
	innerTagFactory.reset();
	TextLayout layout = getCellTextLayout(cell);

	int counts = layout.getLineCount();
	int contentHeight = 0;
	for (int i = 0; i < counts; i++) {
		contentHeight += layout.getLineBounds(i).height;
	}
	layout.dispose();
	contentHeight += Math.max(counts - 1, 0) * SEGMENT_LINE_SPACING;
	contentHeight += 4;// 加上编辑模式下，StyledTextCellEditor的边框
	contentHeight += topPadding;
	contentHeight += bottomPadding;
	return contentHeight;
}
 

import org.eclipse.swt.graphics.TextLayout; //导入方法依赖的package包/类
/**
 * @see Graphics#drawTextLayout(TextLayout, int, int, int, int, Color,
 *      Color)
 */
public void drawTextLayout(TextLayout layout, int x, int y,
		int selectionStart, int selectionEnd, Color selectionForeground,
		Color selectionBackground) {
	TextLayout scaled = zoomTextLayout(layout);
	if (scaled == null) {
		return;
	}
	try {
		graphics.drawTextLayout(scaled,
				(int) Math.floor(x * zoom + fractionalX),
				(int) Math.floor(y * zoom + fractionalY), selectionStart,
				selectionEnd, selectionBackground, selectionForeground);
	} finally {
		scaled.dispose();
	}
}
 

import org.eclipse.swt.graphics.TextLayout; //导入方法依赖的package包/类
protected void drawBlankString( Graphics g, String s )
{
	TextLayout tl = new TextLayout( Display.getCurrent( ) );

	// bidi_hcg: Apply text direction
	tl.setOrientation( this.rtl ? SWT.RIGHT_TO_LEFT : SWT.LEFT_TO_RIGHT );
	
	tl.setText( s );
	Rectangle rc = tl.getBounds( );

	int left = ( getClientArea( ).width - rc.width ) / 2;
	int top = ( getClientArea( ).height - rc.height ) / 2;

	g.drawText( s, getClientArea( ).x + left, getClientArea( ).y + top );
	tl.dispose();
}
 

import org.eclipse.swt.graphics.TextLayout; //导入方法依赖的package包/类
/**
 * Convenience method
 * 
 * @param inWidget
 *            {@link StyledText}
 * @return {@link PaintObjectListener}
 */
public static PaintObjectListener getPaintObjectListener(
        final StyledText inWidget) {
	return new PaintObjectListener() {
		@Override
		public void paintObject(final PaintObjectEvent inEvent) {
			final Display lDisplay = inEvent.display;
			final StyleRange lStyle = inEvent.style;
			final int lPosition = inEvent.x + lStyle.metrics.width
			        - BULLET_WIDTH + 2;
			Font lFont = lStyle.font;
			if (lFont == null)
				lFont = inWidget.getFont();
			final TextLayout lLayout = new TextLayout(lDisplay);
			lLayout.setAscent(inEvent.ascent);
			lLayout.setDescent(inEvent.descent);
			lLayout.setFont(lFont);
			lLayout.setText(String.format("%s.", inEvent.bulletIndex + 1)); //$NON-NLS-1$
			lLayout.draw(inEvent.gc, lPosition, inEvent.y);
			lLayout.dispose();
		}
	};
}
 

import org.eclipse.swt.graphics.TextLayout; //导入方法依赖的package包/类
protected void updateImage() {
	Rectangle bounds = getBounds();
	if (bounds.width <= 0 || bounds.height <= 0)
		return;
	TextLayout layout = new TextLayout(Display.getDefault());
	//layout.setFont(getFont());
	layout.setText(getText());
	for (StyleRange styleRange : ranges) {
		//styleRange.background = ColorConstants.white;
		layout.setStyle(styleRange, styleRange.start, styleRange.start
				+ styleRange.length);
	}
	if (image != null && !image.isDisposed()) {
		image.dispose();
	}
	image = new Image(Display.getDefault(), bounds.width, bounds.height);
	
	GC gc = new GC(image);
	gc.setBackground(ColorConstants.red);
	layout.draw(gc, 0, 0);
	image.getImageData().transparentPixel = image.getImageData().palette
			.getPixel(ColorConstants.white.getRGB());

	
	layout.dispose();
	gc.dispose();
}
 

import org.eclipse.swt.graphics.TextLayout; //导入方法依赖的package包/类
/**
 * Shorten the given text <code>t</code> so that its length doesn't exceed
 * the given width. The default implementation replaces characters in the
 * center of the original string with an ellipsis ("...").
 * Override if you need a different strategy.
 * 
 * @param gc the gc to use for text measurement
 * @param t the text to shorten
 * @param width the width to shorten the text to, in pixels
 * @return the shortened text
 * Note, this code was copied from 
 *   org.eclipse.swt.custom.CLabel.shortenText()
 */
protected String shortenText(GC gc, String t, int width) {
	if (t == null) return null;
	int w = gc.textExtent(ELLIPSIS, DRAW_FLAGS).x;
	if (width<=w) return t;
	int l = t.length();
	int max = l/2;
	int min = 0;
	int mid = (max+min)/2 - 1;
	if (mid <= 0) return t;
	TextLayout layout = new TextLayout (getDisplay());
	layout.setText(t);
	mid = validateOffset(layout, mid);
	while (min < mid && mid < max) {
		String s1 = t.substring(0, mid);
		String s2 = t.substring(validateOffset(layout, l-mid), l);
		int l1 = gc.textExtent(s1, DRAW_FLAGS).x;
		int l2 = gc.textExtent(s2, DRAW_FLAGS).x;
		if (l1+w+l2 > width) {
			max = mid;			
			mid = validateOffset(layout, (max+min)/2);
		} else if (l1+w+l2 < width) {
			min = mid;
			mid = validateOffset(layout, (max+min)/2);
		} else {
			min = max;
		}
	}
	String result = mid == 0 ? t : t.substring(0, mid) + ELLIPSIS + t.substring(validateOffset(layout, l-mid), l);
	layout.dispose();
 	return result;
}
 

import org.eclipse.swt.graphics.TextLayout; //导入方法依赖的package包/类
@Override
public void paintCell(LayerCell cell, GC gc, Rectangle bounds, IConfigRegistry configRegistry) {
	super.paintCell(cell, gc, bounds, configRegistry);
	IStyle cellStyle = CellStyleUtil.getCellStyle(cell, configRegistry);
	setupGCFromConfig(gc, cellStyle);

	TextLayout layout = getCellTextLayout(cell);
	Rectangle rectangle = cell.getBounds();
	layout.draw(gc, rectangle.x + leftPadding, rectangle.y + topPadding);
	layout.dispose();
}
 

import org.eclipse.swt.graphics.TextLayout; //导入方法依赖的package包/类
@Override
public int getPreferredHeight(LayerCell cell, GC gc, IConfigRegistry configRegistry) {
	TextLayout layout = getCellTextLayout(cell);
	int contentHeight = layout.getBounds().height;
	layout.dispose();
	tuv = null;
	contentHeight += topPadding;
	contentHeight += bottomPadding;
	contentHeight += 4;// 加上编辑模式下，StyledTextCellEditor的边框
	return contentHeight;
}
 

import org.eclipse.swt.graphics.TextLayout; //导入方法依赖的package包/类
/**
 * 
 *
 * @param gc
 * @param t
 * @param width
 * @return
 */
protected String shortenText(GC gc, String t, int width) {
    if (t == null) return null;
    int w = gc.textExtent(ELLIPSIS, DRAW_FLAGS).x;
    if (width <= w) return t;
    int l = t.length();
    int max = l / 2;
    int min = 0;
    int mid = (max + min) / 2 - 1;
    if (mid <= 0) return t;
    TextLayout layout = new TextLayout(getDisplay());
    layout.setText(t);
    mid = validateOffset(layout, mid);
    while (min < mid && mid < max) {
        String s1 = t.substring(0, mid);
        String s2 = t.substring(validateOffset(layout, l - mid), l);
        int l1 = gc.textExtent(s1, DRAW_FLAGS).x;
        int l2 = gc.textExtent(s2, DRAW_FLAGS).x;
        if (l1 + w + l2 > width) {
            max = mid;
            mid = validateOffset(layout, (max + min) / 2);
        } else if (l1 + w + l2 < width) {
            min = mid;
            mid = validateOffset(layout, (max + min) / 2);
        } else {
            min = max;
        }
    }
    String result = mid == 0 ? t : t.substring(0, mid) + ELLIPSIS + t.substring(validateOffset(layout, l - mid), l);
    layout.dispose();
    return result;
}
 

import org.eclipse.swt.graphics.TextLayout; //导入方法依赖的package包/类
private String shortenTextCenter(final GC gc, final String text, final int width) {
    if (text == null) {
        return null;
    }
    final int ellipseWidth = gc.textExtent(ELLIPSIS, DRAW_FLAGS).x;
    if (width <= ellipseWidth) {
        return ELLIPSIS;
    }
    else if ((gc.textExtent(text, DRAW_FLAGS)).x <= width) {
        return text;
    }
    final int l = text.length();
    int max = l / 2;
    int min = 0;
    int mid = (max + min) / 2 - 1;
    if (mid <= 0) {
        return ELLIPSIS;
    }
    final TextLayout layout = new TextLayout(getDisplay());
    layout.setText(text);
    mid = calculateOffset(layout, mid);
    while (min < mid && mid < max) {
        final String s1 = text.substring(0, mid);
        final String s2 = text.substring(calculateOffset(layout, l - mid), l);
        final int l1 = gc.textExtent(s1, DRAW_FLAGS).x;
        final int l2 = gc.textExtent(s2, DRAW_FLAGS).x;
        if (l1 + ellipseWidth + l2 > width) {
            max = mid;
            mid = calculateOffset(layout, (max + min) / 2);
        }
        else if (l1 + ellipseWidth + l2 < width) {
            min = mid;
            mid = calculateOffset(layout, (max + min) / 2);
        }
        else {
            min = max;
        }
    }
    final String result = mid == 0 ? ELLIPSIS : text.substring(0, mid)
        + ELLIPSIS
        + text.substring(calculateOffset(layout, l - mid), l);
    layout.dispose();
    return result;
}
 

import org.eclipse.swt.graphics.TextLayout; //导入方法依赖的package包/类
@Override
protected Control createMessageArea(Composite parent) {
	initializeDialogUnits(parent);

	Composite messageComposite= new Composite(parent, SWT.NONE);
	messageComposite.setFont(parent.getFont());
	GridLayout layout= new GridLayout();
	layout.numColumns= 1;
	layout.marginHeight= 0;
	layout.marginWidth= 0;
	layout.verticalSpacing= convertVerticalDLUsToPixels(IDialogConstants.VERTICAL_SPACING);
	layout.horizontalSpacing= convertHorizontalDLUsToPixels(IDialogConstants.HORIZONTAL_SPACING);
	messageComposite.setLayout(layout);
	messageComposite.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));

	Label explain= new Label(messageComposite, SWT.WRAP);
	explain.setLayoutData(new GridData(SWT.BEGINNING, SWT.CENTER, false, false));
	explain.setText(FixMessages.CleanUpPostSaveListener_SlowCleanUpWarningDialog_explain);

	final BulletListBlock cleanUpListBlock= new BulletListBlock(messageComposite, SWT.NONE);
	GridData gridData= new GridData(SWT.FILL, SWT.FILL, true, true);
	cleanUpListBlock.setLayoutData(gridData);
	cleanUpListBlock.setText(fCleanUpNames);

	TextLayout textLayout= new TextLayout(messageComposite.getDisplay());
	textLayout.setText(fCleanUpNames);
	int lineCount= textLayout.getLineCount();
	if (lineCount < 5)
		gridData.heightHint= textLayout.getLineBounds(0).height * 6;
	textLayout.dispose();

	Link link= new Link(messageComposite, SWT.NONE);
	link.setLayoutData(new GridData(SWT.BEGINNING, SWT.CENTER, false, false));
	link.setText(FixMessages.CleanUpPostSaveListener_SlowCleanUpDialog_link);

	link.addSelectionListener(new SelectionAdapter() {
		/*
		 * @see org.eclipse.swt.events.SelectionAdapter#widgetSelected(org.eclipse.swt.events.SelectionEvent)
		 */
		@Override
		public void widgetSelected(SelectionEvent e) {
			PreferencesUtil.createPreferenceDialogOn(getShell(), SaveParticipantPreferencePage.PREFERENCE_PAGE_ID, null, null).open();
		}
	});

	return messageComposite;
}
 

import org.eclipse.swt.graphics.TextLayout; //导入方法依赖的package包/类
/**
 * {@inheritDoc}
 */
public Point computeSize(GC gc, int wHint, int hHint, Object value) {
	GridItem item = (GridItem) value;

	gc.setFont(item.getFont(getColumn()));

	int x = 0;

	x += leftMargin;

	if (isTree()) {
		x += getToggleIndent(item);

		x += toggleRenderer.getBounds().width + insideMargin;

	}

	if (isCheck()) {
		x += checkRenderer.getBounds().width + insideMargin;
	}

	int y = 0;

	Image image = item.getImage(getColumn());
	if (image != null) {
		y = topMargin + image.getBounds().height + bottomMargin;

		x += image.getBounds().width + insideMargin;
	}

	// MOPR-DND
	// MOPR: replaced this code (to get correct preferred height for cells
	// in word-wrap columns)
	//
	// x += gc.stringExtent(item.getText(column)).x + rightMargin;
	//
	// y = Math.max(y,topMargin + gc.getFontMetrics().getHeight() +
	// bottomMargin);
	//
	// with this code:

	int textHeight = 0;
	if (!isWordWrap()) {
		x += gc.textExtent(item.getText(getColumn())).x + rightMargin;

		textHeight = topMargin + textTopMargin + gc.getFontMetrics().getHeight() + textBottomMargin + bottomMargin;
	} else {
		int plainTextWidth;
		if (wHint == SWT.DEFAULT)
			plainTextWidth = getBounds().width - x - rightMargin;
		else
			plainTextWidth = wHint - x - rightMargin;

		TextLayout currTextLayout = new TextLayout(gc.getDevice());
		currTextLayout.setFont(gc.getFont());
		currTextLayout.setText(item.getText(getColumn()));
		currTextLayout.setAlignment(getAlignment());
		currTextLayout.setWidth(plainTextWidth < 1 ? 1 : plainTextWidth);

		x += plainTextWidth + rightMargin;

		textHeight += topMargin + textTopMargin;
		for (int cnt = 0; cnt < currTextLayout.getLineCount(); cnt++)
			textHeight += currTextLayout.getLineBounds(cnt).height;
		textHeight += textBottomMargin + bottomMargin;

		currTextLayout.dispose();
	}

	y = Math.max(y, textHeight);

	return new Point(x, y);
}
 

import org.eclipse.swt.graphics.TextLayout; //导入方法依赖的package包/类
/**
 * {@inheritDoc}
 */
public Point computeSize(GC gc, int wHint, int hHint, Object value) {
	GridItem item = (GridItem) value;

	gc.setFont(item.getFont(getColumn()));

	int x = 0;

	x += leftMargin;

	int y = 0;

	Image image = item.getImage(getColumn());
	if (image != null) {
		y = topMargin + image.getBounds().height + bottomMargin;

		x += image.getBounds().width + 3;
	}

	// MOPR-DND
	// MOPR: replaced this code (to get correct preferred height for cells in word-wrap columns)
	//
	// x += gc.stringExtent(item.getText(column)).x + rightMargin;
	//
	// y = Math.max(y,topMargin + gc.getFontMetrics().getHeight() + bottomMargin);
	//
	// with this code:

	int textHeight = 0;
	if (!isWordWrap()) {
		x += gc.textExtent(item.getText(getColumn())).x + rightMargin;

		textHeight = topMargin + textTopMargin + gc.getFontMetrics().getHeight() + textBottomMargin + bottomMargin;
	} else {
		int plainTextWidth;
		if (wHint == SWT.DEFAULT)
			plainTextWidth = getBounds().width - x - rightMargin;
		else
			plainTextWidth = wHint - x - rightMargin;

		TextLayout currTextLayout = new TextLayout(gc.getDevice());
		currTextLayout.setFont(gc.getFont());
		currTextLayout.setText(item.getText(getColumn()));
		currTextLayout.setAlignment(getAlignment());
		currTextLayout.setWidth(plainTextWidth < 1 ? 1 : plainTextWidth);

		x += plainTextWidth + rightMargin;

		textHeight += topMargin + textTopMargin;
		for (int cnt = 0; cnt < currTextLayout.getLineCount(); cnt++)
			textHeight += currTextLayout.getLineBounds(cnt).height;
		textHeight += textBottomMargin + bottomMargin;

		currTextLayout.dispose();
	}

	y = Math.max(y, textHeight);

	return new Point(x, y);
}
 

import org.eclipse.swt.graphics.TextLayout; //导入方法依赖的package包/类
/**
 * {@inheritDoc}
 */
public Point computeSize(GC gc, int wHint, int hHint, Object value) {
	GridItem item = (GridItem) value;

	gc.setFont(item.getFont(getColumn()));

	int x = 0;

	x += leftMargin;

	int y = 0;

	Image image = item.getImage(getColumn());
	if (image != null) {
		y = topMargin + image.getBounds().height + bottomMargin;
	}

	// MOPR-DND
	// MOPR: replaced this code (to get correct preferred height for cells in word-wrap columns)
	//
	// x += gc.stringExtent(item.getText(column)).x + rightMargin;
	//
	// y = Math.max(y,topMargin + gc.getFontMetrics().getHeight() + bottomMargin);
	//
	// with this code:

	int textHeight = 0;
	if (!isWordWrap()) {
		x += gc.textExtent(item.getText(getColumn())).x + rightMargin;

		textHeight = topMargin + textTopMargin + gc.getFontMetrics().getHeight() + textBottomMargin + bottomMargin;
	} else {
		int plainTextWidth;
		if (wHint == SWT.DEFAULT)
			plainTextWidth = getBounds().width - x - rightMargin;
		else
			plainTextWidth = wHint - x - rightMargin;

		TextLayout currTextLayout = new TextLayout(gc.getDevice());
		currTextLayout.setFont(gc.getFont());
		currTextLayout.setText(item.getText(getColumn()));
		currTextLayout.setAlignment(getAlignment());
		currTextLayout.setWidth(plainTextWidth < 1 ? 1 : plainTextWidth);

		x += plainTextWidth + rightMargin;

		textHeight += topMargin + textTopMargin;
		for (int cnt = 0; cnt < currTextLayout.getLineCount(); cnt++)
			textHeight += currTextLayout.getLineBounds(cnt).height;
		textHeight += textBottomMargin + bottomMargin;

		currTextLayout.dispose();
	}

	y = Math.max(y, textHeight);

	return new Point(x, y);
}