notepad--/command.h

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#pragma once
#include <QString>
enum ChangeDire {
NONE_CHANGE=-1,
LEFT_CHANGE=0,
RIGHT_CHANGE,
BOTH_CHANGE,
};
class Command
{
public:
virtual ~Command() = default;
//获取当前命令的序号,同一个序号的,需要逐渐一起执行
virtual int getOperIndex() = 0;
virtual void undo() = 0;
virtual QString desc() = 0;
//获取左右是否变化的状态。
ChangeDire getChangeStatus() {
return m_changeStaus;
}
void setChangeStatus(ChangeDire c) {
m_changeStaus = c;
}
protected:
ChangeDire m_changeStaus;
};