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);
}