| /******************************************************************************* |
| * Copyright (c) 2000, 2010 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.draw2d; |
| |
| import java.util.ArrayList; |
| |
| import org.eclipse.draw2d.geometry.Dimension; |
| import org.eclipse.draw2d.geometry.Rectangle; |
| import org.eclipse.draw2d.rap.swt.graphics.ColorUtil; |
| import org.eclipse.draw2d.rap.swt.graphics.FontUtil; |
| import org.eclipse.rap.rwt.SingletonUtil; |
| import org.eclipse.swt.graphics.Color; |
| import org.eclipse.swt.graphics.Font; |
| import org.eclipse.swt.graphics.FontMetrics; |
| import org.eclipse.swt.graphics.GC; |
| import org.eclipse.swt.widgets.Shell; |
| |
| |
| /** |
| * Provides miscellaneous Figure operations. |
| */ |
| public class FigureUtilities { |
| |
| private static final float RGB_VALUE_MULTIPLIER = 0.6f; |
| // [RAP AM] remove static usage |
| private GC gc; |
| private Font appliedFont; |
| private FontMetrics metrics; |
| |
| // private static Color ghostFillColor = new Color(null, 31, 31, 31); |
| private static Color ghostFillColor() { |
| return ColorUtil.getColor( 31, 31, 31 ); |
| } |
| |
| private static FigureUtilities instance() { |
| return SingletonUtil.getSessionInstance( FigureUtilities.class ); |
| } |
| |
| /** |
| * Returns a new Color the same as the passed color in a darker hue. |
| * |
| * @param color the color to darken |
| * @return the darkened color |
| * @since 2.0 |
| */ |
| public static Color darker( Color color ) { |
| return new Color( null, |
| ( int )( color.getRed() * RGB_VALUE_MULTIPLIER ), |
| ( int )( color.getGreen() * RGB_VALUE_MULTIPLIER ), |
| ( int )( color.getBlue() * RGB_VALUE_MULTIPLIER ) ); |
| } |
| |
| /** |
| * Returns the FontMetrics associated with the passed Font. |
| * |
| * @param f the font |
| * @return the FontMetrics for the given font |
| * @see GC#getFontMetrics() |
| * @since 2.0 |
| */ |
| public static FontMetrics getFontMetrics( Font f ) { |
| setFont( f ); |
| FigureUtilities fu = instance(); |
| if( fu.metrics == null ) |
| fu.metrics = getGC().getFontMetrics(); |
| return fu.metrics; |
| } |
| |
| /** |
| * Returns the GC used for various utilities. Advanced graphics must not be switched on by clients |
| * using this GC. |
| * |
| * @deprecated do not mess with this GC |
| * @return the GC |
| */ |
| protected static GC getGC() { |
| FigureUtilities fu = instance(); |
| if( fu.gc == null ) { |
| fu.gc = new GC( new Shell() ); |
| fu.appliedFont = fu.gc.getFont(); |
| } |
| return fu.gc; |
| } |
| |
| /** |
| * Returns the dimensions of the String <i>s</i> using the font <i>f</i>. Tab expansion and |
| * carriage return processing are performed. |
| * |
| * @param s the string |
| * @param f the font |
| * @return the text's dimensions |
| * @see GC#textExtent(String) |
| */ |
| protected static org.eclipse.swt.graphics.Point getTextDimension( String s, Font f ) { |
| setFont( f ); |
| return getGC().textExtent( s ); |
| } |
| |
| /** |
| * Returns the highest ancestor for the given figure |
| * |
| * @since 3.0 |
| * @param figure a figure |
| * @return the root ancestor |
| */ |
| public static IFigure getRoot( IFigure figure ) { |
| while( figure.getParent() != null ) |
| figure = figure.getParent(); |
| return figure; |
| } |
| |
| /** |
| * Returns the dimensions of the String <i>s</i> using the font <i>f</i>. No tab expansion or |
| * carriage return processing will be performed. |
| * |
| * @param s the string |
| * @param f the font |
| * @return the string's dimensions |
| * @see GC#stringExtent(java.lang.String) |
| */ |
| protected static org.eclipse.swt.graphics.Point getStringDimension( String s, Font f ) { |
| setFont( f ); |
| return getGC().stringExtent( s ); |
| } |
| |
| /** |
| * Returns the Dimensions of the given text, converting newlines and tabs appropriately. |
| * |
| * @param text the text |
| * @param f the font |
| * @return the dimensions of the given text |
| * @since 2.0 |
| */ |
| public static Dimension getTextExtents( String text, Font f ) { |
| return new Dimension( getTextDimension( text, f ) ); |
| } |
| |
| /** |
| * Returns the Dimensions of <i>s</i> in Font <i>f</i>. |
| * |
| * @param s the string |
| * @param f the font |
| * @return the dimensions of the given string |
| * @since 2.0 |
| */ |
| public static Dimension getStringExtents( String s, Font f ) { |
| return new Dimension( getStringDimension( s, f ) ); |
| } |
| |
| /** |
| * Returns the Dimensions of the given text, converting newlines and tabs appropriately. |
| * |
| * @param s the string |
| * @param f the font |
| * @param result the Dimension that will contain the result of this calculation |
| * @since 2.0 |
| */ |
| public static void getTextExtents( String s, Font f, Dimension result ) { |
| org.eclipse.swt.graphics.Point pt = getTextDimension( s, f ); |
| result.width = pt.x; |
| result.height = pt.y; |
| } |
| |
| /** |
| * Returns the width of <i>s</i> in Font <i>f</i>. |
| * |
| * @param s the string |
| * @param f the font |
| * @return the width |
| * @since 2.0 |
| */ |
| public static int getTextWidth( String s, Font f ) { |
| return getTextDimension( s, f ).x; |
| } |
| |
| /** |
| * Returns a Color the same as the passed color in a lighter hue. |
| * |
| * @param rgb the color |
| * @return the lighter color |
| * @since 2.0 |
| */ |
| public static Color lighter( Color rgb ) { |
| int r = rgb.getRed(), g = rgb.getGreen(), b = rgb.getBlue(); |
| return new Color( null, |
| Math.max( 2, Math.min( ( int )( r / RGB_VALUE_MULTIPLIER ), 255 ) ), |
| Math.max( 2, Math.min( ( int )( g / RGB_VALUE_MULTIPLIER ), 255 ) ), |
| Math.max( 2, Math.min( ( int )( b / RGB_VALUE_MULTIPLIER ), 255 ) ) ); |
| } |
| |
| /** |
| * Produces a ghosting effect on the shape <i>s</i>. |
| * |
| * @param s the shape |
| * @return the ghosted shape |
| * @since 2.0 |
| */ |
| public static Shape makeGhostShape( Shape s ) { |
| s.setBackgroundColor( ghostFillColor() ); |
| s.setFillXOR( true ); |
| s.setOutlineXOR( true ); |
| return s; |
| } |
| |
| /** |
| * Mixes the passed Colors and returns the resulting Color. |
| * |
| * @param c1 the first color |
| * @param c2 the second color |
| * @param weight the first color's weight from 0-1 |
| * @return the new color |
| * @since 2.0 |
| */ |
| public static Color mixColors( Color c1, Color c2, double weight ) { |
| return new Color( null, |
| ( int )( c1.getRed() * weight + c2.getRed() * ( 1 - weight ) ), |
| ( int )( c1.getGreen() * weight + c2.getGreen() * ( 1 - weight ) ), |
| ( int )( c1.getBlue() * weight + c2.getBlue() * ( 1 - weight ) ) ); |
| } |
| |
| /** |
| * Mixes the passed Colors and returns the resulting Color. |
| * |
| * @param c1 the first color |
| * @param c2 the second color |
| * @return the new color |
| * @since 2.0 |
| */ |
| public static Color mixColors( Color c1, Color c2 ) { |
| return new Color( null, |
| ( c1.getRed() + c2.getRed() ) / 2, |
| ( c1.getGreen() + c2.getGreen() ) / 2, |
| ( c1.getBlue() + c2.getBlue() ) / 2 ); |
| } |
| |
| /** |
| * Paints a border with an etching effect, having a shadow of Color <i>shadow</i> and highlight of |
| * Color <i>highlight</i>. |
| * |
| * @param g the graphics object |
| * @param r the bounds of the border |
| * @param shadow the shadow color |
| * @param highlight the highlight color |
| * @since 2.0 |
| */ |
| public static void paintEtchedBorder( Graphics g, Rectangle r, Color shadow, Color highlight ) { |
| int x = r.x, y = r.y, w = r.width, h = r.height; |
| g.setLineStyle( Graphics.LINE_SOLID ); |
| g.setLineWidth( 1 ); |
| g.setXORMode( false ); |
| w -= 2; |
| h -= 2; |
| g.setForegroundColor( shadow ); |
| g.drawRectangle( x, y, w, h ); |
| x++ ; |
| y++ ; |
| g.setForegroundColor( highlight ); |
| g.drawRectangle( x, y, w, h ); |
| } |
| |
| /** |
| * Helper method to paint a grid. Painting is optimized as it is restricted to the Graphics' clip. |
| * |
| * @param g The Graphics object to be used for painting |
| * @param f The figure in which the grid is to be painted |
| * @param origin Any point where the grid lines are expected to intersect |
| * @param distanceX Distance between vertical grid lines; if 0 or less, vertical grid lines will |
| * not be drawn |
| * @param distanceY Distance between horizontal grid lines; if 0 or less, horizontal grid lines |
| * will not be drawn |
| * @since 3.0 |
| */ |
| public static void paintGrid( Graphics g, |
| IFigure f, |
| org.eclipse.draw2d.geometry.Point origin, |
| int distanceX, |
| int distanceY ) |
| { |
| Rectangle clip = g.getClip( Rectangle.getSINGLETON() ); |
| if( distanceX > 0 ) { |
| if( origin.x >= clip.x ) |
| while( origin.x - distanceX >= clip.x ) |
| origin.x -= distanceX; |
| else |
| while( origin.x < clip.x ) |
| origin.x += distanceX; |
| for( int i = origin.x; i < clip.x + clip.width; i += distanceX ) |
| g.drawLine( i, clip.y, i, clip.y + clip.height ); |
| } |
| if( distanceY > 0 ) { |
| if( origin.y >= clip.y ) |
| while( origin.y - distanceY >= clip.y ) |
| origin.y -= distanceY; |
| else |
| while( origin.y < clip.y ) |
| origin.y += distanceY; |
| for( int i = origin.y; i < clip.y + clip.height; i += distanceY ) |
| g.drawLine( clip.x, i, clip.x + clip.width, i ); |
| } |
| } |
| |
| /** |
| * Paints a border with an etching effect, having a shadow of a darker version of g's background |
| * color, and a highlight a lighter version of g's background color. |
| * |
| * @param g the graphics object |
| * @param r the bounds of the border |
| * @since 2.0 |
| */ |
| public static void paintEtchedBorder( Graphics g, Rectangle r ) { |
| Color rgb = g.getBackgroundColor(), shadow = darker( rgb ), highlight = lighter( rgb ); |
| paintEtchedBorder( g, r, shadow, highlight ); |
| } |
| |
| /** |
| * Sets Font to passed value. |
| * |
| * @param f the new font |
| * @since 2.0 |
| */ |
| protected static void setFont( Font f ) { |
| FigureUtilities fu = instance(); |
| f = FontUtil.getFont( f.getFontData() ); |
| getGC().setFont( f ); |
| fu.appliedFont = f; |
| fu.metrics = null; |
| } |
| |
| /** |
| * Returns the figure which is the nearest common ancestor of both figures, or <code>null</code> |
| * if there is no common ancestor. A figure is an ancestor if it is the parent of another figure, |
| * or if it is the ancestor of that figure's parent. If one figure is the ancestor of the other, |
| * it is returned as the common ancestor. |
| * |
| * @since 3.1 |
| * @param l left |
| * @param r right |
| * @return the common ancestor, if it exists, or <code>null</code>. |
| */ |
| public static IFigure findCommonAncestor( IFigure l, IFigure r ) { |
| if( l == r ) |
| return l; |
| ArrayList left = new ArrayList(); |
| ArrayList right = new ArrayList(); |
| while( l != null ) { |
| left.add( l ); |
| l = l.getParent(); |
| } |
| while( r != null ) { |
| right.add( r ); |
| r = r.getParent(); |
| } |
| if( left.isEmpty() || right.isEmpty() ) |
| return null; |
| for( int i = 0; i < left.size(); i++ ) { |
| if( right.contains( left.get( i ) ) ) |
| return ( IFigure )left.get( i ); |
| } |
| return null; |
| } |
| |
| /** |
| * Returns <code>true</code> if the ancestor contains the descendant, or is the ancestor of the |
| * descendant's parent. |
| * |
| * @param ancestor the ancestor |
| * @param descendant the descendant |
| * @return <code>true</code> if ancestor |
| * @since 3.2 |
| */ |
| public static boolean isAncestor( final IFigure ancestor, IFigure descendant ) { |
| while( descendant != null ) { |
| descendant = descendant.getParent(); |
| if( descendant == ancestor ) |
| return true; |
| } |
| return false; |
| } |
| |
| /** |
| * Determines whether the given figure is showing and not (completely) clipped. |
| * |
| * @param figure The figure to test |
| * @return <code>true</code> if the given figure is showing and not completely clipped, |
| * <code>false</code> otherwise. |
| * @since 3.7 |
| */ |
| public static boolean isNotFullyClipped( IFigure figure ) { |
| if( figure == null || !figure.isShowing() ) { |
| return false; |
| } |
| // check if figure is clipped |
| // TODO: IClippingStrategy has to be taken into consideration as well. |
| Rectangle figBounds = figure.getBounds().getCopy(); |
| IFigure walker = figure.getParent(); |
| while( !figBounds.isEmpty() && walker != null ) { |
| walker.translateToParent( figBounds ); |
| figBounds.intersect( walker.getBounds() ); |
| walker = walker.getParent(); |
| } |
| return !figBounds.isEmpty(); |
| } |
| } |