我正在使用Javafx应用程序来处理电子表格视图。我正在从本地存储导入文件,并在javafx应用程序的电子表格视图中显示。我已经实现了几乎所有功能,但是撤消和重做功能对我来说似乎非常困难。即使我也没有从哪里开始,会有什么手术案例,不知道:( 请帮助我,以您的经验和知识。 在此先感谢您!!
答案 0 :(得分:0)
我已经解决了此问题,此解决方案的逻辑是:-
public class UndoRedo {
private SpreadsheetCell cell;
private String oldValue;
private String newValue;
public UndoRedo(SpreadsheetCell cell, String oldValue, String newValue) {
this.cell = cell;
this.oldValue = oldValue;
this.newValue = newValue;
}
public SpreadsheetCell getCell() {
return cell;
}
public void setCell(SpreadsheetCell cell) {
this.cell = cell;
}
public String getOldValue() {
return oldValue;
}
public void setOldValue(String oldValue) {
this.oldValue = oldValue;
}
public String getNewValue() {
return newValue;
}
public void setNewValue(String newValue) {
this.newValue = newValue;
}
}
SpreadSheet上的添加事件,用于在Cell中任何更改操作的列表中添加对象。
mGridBase.addEventHandler(GridChange.GRID_CHANGE_EVENT, (GridChange e) -> {
isCellEdited = true;
SpreadsheetCell cell = mGridBase.getRows().get(e.getRow()).get(e.getColumn());
String oldValue = lastValue;
UndoRedo undoRedo = new UndoRedo(cell, oldValue, cell.getText());
undoRedoList.add(undoRedo);
});
现在在
上添加Key事件Ctrl + Z
关于UNDO的最后更改
if (KeyCode.Z == event.getCode() && event.isControlDown()) {
if (!undoRedoList.isEmpty()) {
UndoRedo undoRedo = undoRedoList.remove(undoRedoList.size() - 1);
undoRedo.getCell().setItem(undoRedo.getOldValue());
mSpreadsheet.getSelectionModel().clearAndSelect(undoRedo.getCell().getRow(), mSpreadsheet.getColumns().get(undoRedo.getCell().getColumn()));
}
}
现在,它可以完美,可靠地工作
Grid grid = ...; Stack<GridChange> undoStack = ...; grid.addEventHandler(GridChange.GRID_CHANGE_EVENT, new EventHandler<GridChange>() {
public void handle(GridChange change) {
undoStack.push(change);
}
});