利用ＧＥＦ制作表格系统(模型设计)

模型设计

１、建立通用模型，实现模型属性变化的跟踪

public class AbstractNode implements Cloneable,IPropertySource, Serializable {

…

      private static final long serialVersionUID=10000100L;

     

     

      private PropertyChangeSupport listeners = new PropertyChangeSupport(this);

      public void addPropertyChangeListener(PropertyChangeListener listener){

             listeners.addPropertyChangeListener(listener);

      }

      public void firePropertyChange(String propName,Object oldValue,Object newValue){

             listeners.firePropertyChange(propName,oldValue,newValue);

      }

      public void removePropertyChange(PropertyChangeListener listener){

             listeners.removePropertyChangeListener(listener);

      }

…

}

 

２、建立画布模型，增加子元素列表，实现子元素变化的追踪

public class DiagramNode extends AbstractNode{

      public static final String P_CHILDREN ="_children";

      protected List children=new ArrayList(); 

      public void setChildren(List children){

             if(children !=  null){

                    this.children=children;

             }else{

                    this.children=new ArrayList();

             }

             this.firePropertyChange(P_CHILDREN, null, children);

      }

      public List getChildren(){

             return this.children;

      }

      public void addChild(Object child){

             children.add(child);

             firePropertyChange(P_CHILDREN, null, null);     

      }

      public void addChild(int index,Object child){

             if(index == -1){                 

                    this.children.add(child);

             }else{

                    this.children.add(index, child);

             }

             firePropertyChange(P_CHILDREN,null,null);

      }    

      public void removeChild(Object child){

             children.remove(child);

             firePropertyChange(P_CHILDREN,null,null);

      }

      public void moveChild(int index,AbstractNode child){

         children.remove(child);

         children.add(index, child);

         firePropertyChange(P_CHILDREN,null,null);

    }

}

３、建立表格模型，增加子元素列表，实现对子元素变化的追踪；建立表格间距等属性的编辑和追踪管理

public class TableNode extends AbstractNode {

      public static final String P_CHILDREN ="_children";

      public static final String P_GRIDMANAGER="_gmanaer";

      public static final String P_CHILDCHANGE="_change";

      public static final String P_TABLEHSPACE="_hspace";

      public static final String P_TABLEVSPACE="_vspace";

      public static final String P_MARGINWIDTH="_hmargin";

      public static final String P_MARGINHEIGHT="_vmargin";

      public static final String P_TABLEBGCOLOR="_bgcolor";

      public static final String P_OPERATE="_operate";

     

      protected List children=new ArrayList(); 

      private boolean border=true;

      private GridLayout grid;

      private int widthHint  = 20;

      private int heightHint = 20;

      private int rows=0;

      private String operate="row";

      private boolean childChange=false;

     

      private String bgColor="255:255:255";

      public TableNode(){

             super();

             constraint.width=widthHint*4;

             constraint.height=40;

      }

      public void setChildren(List children){

             if(children !=  null){

                    this.children=children;

             }else{

                    this.children=new ArrayList();

             }

             this.firePropertyChange(P_CHILDREN, null, children);

      }

      public List getChildren(){

             return this.children;

      }

      public void addChild(Object child){

             children.add(child);

             firePropertyChange(P_CHILDREN, null, null);

     

      }

      public void addChild(int index,Object child){

             if(index == -1){

                   

                    this.children.add(child);

             }else{

                    this.children.add(index, child);

             }

             firePropertyChange(P_CHILDREN,null,null);

      }

     

      public void removeChild(Object child){

             children.remove(child);

             firePropertyChange(P_CHILDREN,null,null);

      }

      public void moveChild(int index,AbstractNode child){

         children.remove(child);

         children.add(index, child);

         firePropertyChange(P_CHILDREN,null,null);

    }

  

      public GridLayout getGrid() {

             if(grid==null){

                    grid = new GridLayout();

                    grid.numColumns=4;

             }

             return grid;

      }

      public void setGrid(GridLayout grid) {

             this.grid = grid;

             this.firePropertyChange(P_GRIDMANAGER, null, grid);

      }

      public boolean isBorder() {

             return border;

      }

      public void setBorder(boolean border) {

             this.border = border;

      }

      public int getWidthHint() {

             return widthHint;

      }

      public void setWidthHint(int widthHint) {

             this.widthHint = widthHint;

      }

      public int getHeightHint() {

             return heightHint;

      }

      public void setHeightHint(int heightHint) {

             this.heightHint = heightHint;

      }

      public int getRows() {

             return rows;

      }

      public void setRows(int rows) {

             this.rows = rows;

      }

      public String getOperate() {

             return operate;

      }

      public void setOperate(String operate) {

             this.operate = operate;

      }

      public boolean isChildChange() {

             return childChange;

      }

      public void setChildChange(boolean childChange) {

             this.childChange = childChange;

             this.firePropertyChange(P_CHILDCHANGE, null, null);

      }

      //表格属性

      public int getTableHorizontalSpace(){

             GridLayout grid=getGrid();

             return grid.horizontalSpacing;

      }

      public void setTableHorizontalSpace(String ss){

             GridLayout grid=getGrid();

             int delta=Integer.parseInt(ss)-grid.horizontalSpacing;

             if(delta != 0){

                    grid.horizontalSpacing=Integer.parseInt(ss);

                    this.firePropertyChange(P_GRIDMANAGER,null,"hspace:"+delta);

             }

      }

     

      public int getTableVerticalSpace(){

             GridLayout grid=getGrid();

             return grid.verticalSpacing;

      }

      public void setTableVerticalSpace(String ss){

             GridLayout grid=getGrid();

             int delta=Integer.parseInt(ss) - grid.verticalSpacing ;

             if(delta != 0){

                    grid.verticalSpacing=Integer.parseInt(ss);

                    this.firePropertyChange(P_GRIDMANAGER,null,"vspace:"+delta);

             }

      }

     

      public int getTableHorizontalMargin(){

             GridLayout grid=getGrid();

             return grid.marginWidth;

      }

      public void setTableHorizontalMargin(String ss){

             GridLayout grid=getGrid();

             int delta=Integer.parseInt(ss) - grid.marginWidth;

             if(delta !=0 ){

                    grid.marginWidth=Integer.parseInt(ss);

                    this.firePropertyChange(P_GRIDMANAGER,null, margin:"+delta);

             }

      }

     

      public int getTableVerticalMargin(){

             GridLayout grid=getGrid();

             return grid.marginHeight;

      }

      public void setTableVerticalMargin(String ss){

             GridLayout grid=getGrid();

             int delta=Integer.parseInt(ss) - grid.marginHeight;

             if(delta != 0){

                    grid.marginHeight=Integer.parseInt(ss);

                    this.firePropertyChange(P_GRIDMANAGER, null, "vmargin:"+delta);

             }

      }

      public Color getBgColor() {

             if(this.bgColor ==null){

                    return new Color(null,255,255,255);

             }else{

                    String[] rgb=bgColor.split(":");

                    return new Color(null,Integer.parseInt(rgb[0]),Integer.parseInt(rgb[1]),Integer.parseInt(rgb[2]));

             }

            

      }

      public void setBgColor(Color bgColor) {

             this.bgColor = bgColor.getRed()+":"+bgColor.getGreen()+":"+bgColor.getBlue();

             this.firePropertyChange(P_TABLEBGCOLOR, null, null);

      }