svgimage.java

完全基于java开发的svg矢量绘图工具

				SVGFrame frm=null;
				LinkedList toBeRemoved=new LinkedList();
				Object mouseListener=null;
				
				//removes all the motion adapters from the frames
				for(it=mouseAdapterFrames.keySet().iterator(); it.hasNext();){
				    
					try{frm=(SVGFrame)it.next();}catch (Exception ex){frm=null;}
			
					if(frm!=null && ! frames.contains(frm)){
					    
						try{
							mouseListener=mouseAdapterFrames.get(frm);
							frm.getScrollPane().getSVGCanvas().removeMouseListener((MouseAdapter)mouseListener);
							frm.getScrollPane().getSVGCanvas().removeMouseMotionListener((MouseMotionListener)mouseListener);
						}catch (Exception ex){}
						
						toBeRemoved.add(frm);
					}
				}
					
				//removes the frames that have been closed
				for(it=toBeRemoved.iterator(); it.hasNext();){
				    
					try{mouseAdapterFrames.remove(it.next());}catch (Exception ex){}
				}
				
				ImageMouseListener iml=null;

				//adds the new motion adapters
				for(it=frames.iterator(); it.hasNext();){
				    
					try{frm=(SVGFrame)it.next();}catch (Exception ex){frm=null;}
			
					if(frm!=null && ! mouseAdapterFrames.containsKey(frm)){
				
						iml=new ImageMouseListener(frm);

						try{
							frm.getScrollPane().getSVGCanvas().addMouseListener(iml);
							frm.getScrollPane().getSVGCanvas().addMouseMotionListener(iml);
							frm.getScrollPane().getSVGCanvas().setSVGCursor(createCursor);
						}catch (Exception ex){}
						
						mouseAdapterFrames.put(frm, iml);
					}
				}				
			}
		}
		
		/**
		 * used to remove the listener added to draw a rectangle when the user clicks on the menu item
		 */	
		protected void cancelActions(){
			
			if(isActive){
				
				//removes the listeners
				Iterator it;
				SVGFrame frm=null;
				LinkedList toBeRemoved=new LinkedList();
				Object mouseListener=null;
				
				//removes all the motion adapters from the frames
				for(it=mouseAdapterFrames.keySet().iterator(); it.hasNext();){
				    
					try{frm=(SVGFrame)it.next();}catch (Exception ex){frm=null;}
					
					if(frm!=null){
					    
						//resets the information displayed
						frm.getStateBar().setSVGW("");
						frm.getStateBar().setSVGH("");
						frm.getScrollPane().getSVGCanvas().setSVGCursor(frm.getSVGEditor().getCursors().getCursor("default"));
						
						try{
							mouseListener=mouseAdapterFrames.get(frm);
							frm.getScrollPane().getSVGCanvas().removeMouseListener((MouseAdapter)mouseListener);
							frm.getScrollPane().getSVGCanvas().removeMouseMotionListener((MouseMotionListener)mouseListener);
							
							if(mouseListener!=null && ((ImageMouseListener)mouseListener).paintListener!=null){
								//removes the paint listener
								frm.getScrollPane().getSVGCanvas().removePaintListener(((ImageMouseListener)mouseListener).paintListener, true);
							}
						}catch (Exception ex){}
						
						toBeRemoved.add(frm);
					}
				}
				
				//removes the frames that have been closed				
				for(it=toBeRemoved.iterator(); it.hasNext();){
				    
					try{mouseAdapterFrames.remove(it.next());}catch (Exception ex){}
				}
				
				isActive=false;
			}
		}
		
		/**
		 * the action to be done
		 * @param e the event
		 */
		public void actionPerformed(ActionEvent e){

			if((e.getSource() instanceof JMenuItem && ! toolItem.isSelected()) || (e.getSource() instanceof JToggleButton)){

				getSVGEditor().cancelActions(false);
				
				if(getSVGEditor().getFrameManager().getCurrentFrame()!=null){
					
					toolItem.removeActionListener(imageAction);
					toolItem.setSelected(true);
					toolItem.addActionListener(imageAction);
			
					//the listener is active
					isActive=true;
					source=e.getSource();
					
					Collection frames=getSVGEditor().getFrameManager().getFrames();
					Iterator it;
					SVGFrame frm=null;
					ImageMouseListener iml=null;
					    
					//adds the new motion adapters
					for(it=frames.iterator(); it.hasNext();){
					    
						try{frm=(SVGFrame)it.next();}catch (Exception ex){frm=null;}
					
						if(frm!=null){
	
							iml=new ImageMouseListener(frm);
	
							try{
								frm.getScrollPane().getSVGCanvas().addMouseListener(iml);
								frm.getScrollPane().getSVGCanvas().addMouseMotionListener(iml);
								frm.getScrollPane().getSVGCanvas().setSVGCursor(createCursor);
							}catch (Exception ex){}
							
							mouseAdapterFrames.put(frm, iml);
						}
					}
				}
			}
		}
			
		protected class ImageMouseListener extends MouseAdapter implements MouseMotionListener{
		
			/**
			 * the points of the area corresponding to the future rectangle
			 */		
			private Point2D.Double point1=null, point2=null;
			
			private SVGFrame frame;
			
			/**
			 * the paint listener
			 */
			private CanvasPaintListener paintListener=null;
		
			/**
			 * the constructor of the class
			 * @param frame the current frame
			 */
			public ImageMouseListener(SVGFrame frame){
			    
				this.frame=frame;
				final SVGFrame fframe=frame;
				
				//adds a paint listener
				paintListener=new CanvasPaintListener(){

					public void paintToBeDone(Graphics g) {
						
						if(point1!=null && point2!=null){
					        
							Rectangle2D.Double rect=getSVGEditor().getSVGToolkit().getComputedRectangle(point1, point2);
							Rectangle2D.Double rect2=new Rectangle2D.Double(rect.x, rect.y, rect.width, rect.height);
							Rectangle2D.Double computedBounds=fframe.getScaledRectangle(rect2, false);
							
							//draws the shape of the element that will be created if the user released the mouse button
							svgImage.drawGhost(fframe, (Graphics2D)g, computedBounds);
						}
					}
				};
				
				frame.getScrollPane().getSVGCanvas().addLayerPaintListener(SVGCanvas.DRAW_LAYER, paintListener, false);
			}
		
			/**
			 * @param evt the event
			 */
			public void mouseDragged(MouseEvent evt) {
				
				//sets the second point of the element
				point2=frame.getAlignedWithRulersPoint(evt.getPoint());
				
				//asks the canvas to be repainted to draw the shape of the future element
				frame.getScrollPane().getSVGCanvas().delayedRepaint();
				
			}
			
			/**
			 * @param evt the event
			 */
			public void mouseMoved(MouseEvent evt) {
			}
				
			/**
			 * @param evt the event
			 */
			public void mousePressed(MouseEvent evt){
			    
				//sets the first point of the area corresponding to the future element
				point1=frame.getAlignedWithRulersPoint(evt.getPoint());
			}
			
			/**
			 * @param evt the event
			 */
			public void mouseReleased(MouseEvent evt){
				
				//the dialog box to specify the image file
				String uri;
				JFileChooser fileChooser=new JFileChooser();
				
				if(getSVGEditor().getResource().getCurrentDirectory()!=null){
				    
					fileChooser.setCurrentDirectory(getSVGEditor().getResource().getCurrentDirectory());
				}
				
				String canvasPath="";
				
				try{
					canvasPath=new URI(frame.getName()).toString();
				}catch (Exception ex){canvasPath="";}

				final String fcanvasPath=canvasPath;
				
				//the file filter
				fileChooser.setFileFilter(new javax.swing.filechooser.FileFilter(){

					public boolean accept(File f) {
					    
					    String name=f.getName();
					    name=name.toLowerCase();

						if(       f.isDirectory() || (name.endsWith(SVGToolkit.SVG_FILE_EXTENSION) &&
								! fcanvasPath.equals(f.toURI().toString())) || 
                                name.endsWith(".png") || name.endsWith(".jpg") || name.endsWith(".gif")){
						    
						    return true;
						}
						
						else return false;
					}

					public String getDescription() {
					    
						return (String)labels.get("filefilter");
					}
				});
				
				fileChooser.setMultiSelectionEnabled(false); 
					
				int returnVal=fileChooser.showOpenDialog(frame.getSVGEditor().getParent());
				
				if(returnVal==JFileChooser.APPROVE_OPTION) {
				    
					getSVGEditor().getResource().setCurrentDirectory(fileChooser.getCurrentDirectory());
					
					URI docUri=null;
					
					try{
					    docUri=new URI(frame.getName());
					}catch (Exception ex){docUri=null;}

					if(docUri!=null){
					    
						//relativizes the uri
						URI rUri=null;
						URI u=fileChooser.getSelectedFile().toURI();
						
						try{
							File docFile=new File(docUri);
							docUri=docFile.getParentFile().toURI();
							rUri=docUri.relativize(u);
						}catch (Exception ex){}
						
						uri=rUri.toString();
						
					}else{
					    
						try{
							
							uri=fileChooser.getSelectedFile().toURI().toString();
						}catch (Exception ex) {uri=null;}
					}

					Point2D.Double point=frame.getAlignedWithRulersPoint(evt.getPoint());

					//creates the image in the SVG document
					if(uri!=null && ! uri.equals("") && point1!=null && point1.x>=0 && point1.y>=0 && point!=null){
					
						final Rectangle2D.Double rect=getSVGEditor().getSVGToolkit().getComputedRectangle(point1, point);
						final String furi=new String(uri);

						Runnable runnable=new Runnable(){
							
							public void run() {

								svgImage.drawImage(frame, rect, furi);								
							}
						};
						
						frame.enqueue(runnable);
					}
				}
				
				getSVGEditor().cancelActions(true);
				point1=null;
				point2=null;
			}
		}
	}
}