svgtext.java

完全基于java开发的svg矢量绘图工具

	                    
	                    if(kev.getID()==KeyEvent.KEY_PRESSED){
	                        
			                if(kev.getKeyCode()==KeyEvent.VK_ENTER){
			                    
			                    ok.doClick();
			                    
			                }else if(kev.getKeyCode()==KeyEvent.VK_CANCEL){

			                    cancel.doClick();
			                }
	                    }
	                }
	            }
	        };
	        
	        Toolkit.getDefaultToolkit().addAWTEventListener(keyListener, AWTEvent.KEY_EVENT_MASK);

			//dealing with the dialog close button
			dialog.setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);
			
			pack();
			
			//sets the location of the dialog box
			int 	x=(int)(getSVGEditor().getParent().getLocationOnScreen().getX()+getSVGEditor().getParent().getWidth()/2-getSize().getWidth()/2), 
					y=(int)(getSVGEditor().getParent().getLocationOnScreen().getY()+getSVGEditor().getParent().getHeight()/2-getSize().getHeight()/2);
			
			setLocation(x,y);
		}
		
		/**
		 * @return the value of the text entered
		 */
		protected String getText(){
			return textField.getText();
		}
	}
	
	/**
	 * used to remove the listener added to draw a rectangle when the user clicks on the menu item
	 */
	public void cancelActions(){
	    
		if(textAction!=null){
		    
			toolItem.removeActionListener(textAction);
			toolItem.setSelected(false);
			toolItem.addActionListener(textAction);
			
		    textAction.cancelActions();
		}
	}
	
	/**
	 * 
	 * @author Jordi SUC
	 * the class allowing to know the position of the future text
	 */
	protected class TextActionListener implements ActionListener{

		/**
		 * the hashtable associating a frame to its mouse adapter
		 */
		private final Hashtable mouseAdapterFrames=new Hashtable();
		
		/**
		 * an instance of this class
		 */
		private final TextActionListener action=this;
		
		/**
		 * the cursor used when creating a rectangle
		 */
		private Cursor createCursor;
		
		private boolean isActive=false;
		
		/**
		 * the source component
		 */
		private Object source=null;
		
		/**
		 * the constructor of the class
		 */
		protected TextActionListener(){
			
			createCursor=getSVGEditor().getCursors().getCursor("text");
		}
		
		/**
		 * resets the listener
		 */
		protected void reset(){
			
			if(isActive){
			    
				Collection frames=getSVGEditor().getFrameManager().getFrames();
			
				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 && ! 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){}
				}

				TextMouseListener tml=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)){
				
						tml=new TextMouseListener(frm);

						try{
							frm.getScrollPane().getSVGCanvas().addMouseListener(tml);
							frm.getScrollPane().getSVGCanvas().addMouseMotionListener(tml);
							frm.getScrollPane().getSVGCanvas().setSVGCursor(createCursor);
						}catch (Exception ex){}
						
						mouseAdapterFrames.put(frm, tml);
					}
				}				
			}
		}
		
		/**
		 * 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);
						}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(textAction);
					toolItem.setSelected(true);
					toolItem.addActionListener(textAction);
			
					//the listener is active
					isActive=true;
					source=e.getSource();
	
					Collection frames=getSVGEditor().getFrameManager().getFrames();
	
					Iterator it;
					SVGFrame frm=null;
					TextMouseListener tml=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){
	
							tml=new TextMouseListener(frm);
	
							try{
								frm.getScrollPane().getSVGCanvas().addMouseListener(tml);
								frm.getScrollPane().getSVGCanvas().addMouseMotionListener(tml);
								frm.getScrollPane().getSVGCanvas().setSVGCursor(createCursor);
							}catch (Exception ex){}
							
							mouseAdapterFrames.put(frm, tml);
						}
					}
				}
			}
		}
			
		protected class TextMouseListener extends MouseAdapter implements MouseMotionListener{
		
			/**
			 * the points of the area corresponding to the future rectangle
			 */		
			private Point2D.Double point=null;
			
			private SVGFrame frame;
		
			/**
			 * the constructor of the class
			 * @param frame
			 */
			public TextMouseListener(SVGFrame frame){
			    
				this.frame=frame;
			}

			/**
			 * @param evt the event
			 */
			public void mouseDragged(MouseEvent evt) {
			}
				
			/**
			 * @param evt the event
			 */
			public void mouseMoved(MouseEvent evt) {
			}
			
			/**
			 * @param evt the event
			 */
			public void mouseReleased(MouseEvent evt){
				
				if(evt.getPoint()!=null){
					
					final Point2D.Double point=frame.getAlignedWithRulersPoint(evt.getPoint());
					
					//gets the text value by displaying a dialog box
					TextDialog dialog=null;
					
					if(getSVGEditor().getParent() instanceof JFrame){
						
						dialog=new TextDialog((JFrame)getSVGEditor().getParent());
						
					}else{
						
						dialog=new TextDialog(new JFrame(""));
					}
					
					dialog.setVisible(true);
					final String value=dialog.getText();
					
					// attaches the element to the svg root element
					Runnable runnable=new Runnable(){
						
						public void run() {

							svgText.drawText(frame, point, value);
						}
					};
					
					frame.enqueue(runnable);
				}

				getSVGEditor().cancelActions(true);
			}
		}	
	}
}