学习QT过程中遇到的各种头疼的问题…

来源：互联网发布：java面向对象编程题编辑：程序博客网时间：2024/05/11 20:07

昨天遗留的问题：
几个Check是相关联，就是一些选中，其余也必须选中，一个未选中，其他的也不能选中，今天一大早就解决这个问题。
学习QT过程中遇到的各种头疼的问题【2】

OK 没有浪费一大早上的时间，解决了一个很棘手的问题，
实现了多个CheckBox的关联。
源代码一定要贴出来，关系是这样的，commonCheckBox是

最基础的，出了ACKCheckBox外，其他的detailedCheckBox

和Drop碰到packetsCheckBox都要以他为基础才能选中，

packetsCheckBox就必须以detailedCheckBox为基础，才能

选中。ACkCheckBox可以独立。

源码：
void SelectView::CommonCheckState()
{
   if(commonCheckBox->isChecked())
    {
       sql="select * from alarm";
    }
    else
    {
       sql ="";
       detailedCheckBox->setChecked(false);
       droppedCheckBox->setChecked(false);
    }
    emitACKCheckState();
}
void SelectView::DetailedCheckState()
{
   if(detailedCheckBox->isChecked())
    {
       if(!commonCheckBox->isChecked())
       {
           commonCheckBox->setChecked(true);
       }
       sql ="select * from alarm,alarm_extradata

where alarm.aid = alarm_extradata.aid";
    }
    else
    {
       if(droppedCheckBox->isChecked())
       {
           droppedCheckBox->setChecked(false);
       }
       sql="select * from alarm";
    }
    emitACKCheckState();
}
void SelectView::DroppedCheckState()
{
   if(droppedCheckBox->isChecked())
    {
       commonCheckBox->setChecked(true);
       detailedCheckBox->setChecked(true);
       sql = "select * from

alarm,alarm_extradata,alarm_droppedpackets where

alarm.aid=alarm_extradata.aid and alarm.aid =

alarm_droppedpackets.aid";
    }
    emitACKCheckState();
}
void SelectView::ACKCheckState()
{
   if(AckCheckBox->isChecked())
    {
       if(droppedCheckBox->isChecked())
       {
           sql = "select * from

alarm,alarm_extradata,alarm_droppedpackets,alarm_ac

k where alarm.aid = alarm_extradata.aid and

alarm.aid = alarm_droppedpackets.aid and alarm.aid

= alarm_ack.aid";
       }
       else if(detailedCheckBox->isChecked())
       {
           sql ="select * from

alarm,alarm_extradata,alarm_ack where alarm.aid =

alarm_extradata.aid and alarm.aid = alarm_ack.aid";
       }
       else if (commonCheckBox->isChecked())
       {
           sql="select * from alarm,alarm_ack

where alarm.aid = alarm_ack.aid";
       }
       else
       {
           sql = "select * from alarm_ack";
       }
    }
    else

        if(droppedCheckBox->isChecked())

            commonCheckBox->setChecked(true);

            detailedCheckBox->setChecked(true);

            sql = "select * from alarm,alarm_extradata,alarm_droppedpackets where alarm.aid=alarm_extradata.aid and alarm.aid = alarm_droppedpackets.aid";

        else if(detailedCheckBox->isChecked())

            commonCheckBox->setChecked(true);

            sql="select * from alarm";

        else if(commonCheckBox->isChecked())

            sql="select * from alarm";

        else

            sql ="";

}

PS：这些都是槽函数，只有这几个CheckBox状态改变的时

候才会调用：
connect(commonCheckBox,SIGNAL(stateChanged

(int)),this,SLOT(CommonCheckState()));
   connect(detailedCheckBox,SIGNAL(stateChanged

(int)),this,SLOT(DetailedCheckState()));
   connect(droppedCheckBox,SIGNAL(stateChanged

(int)),this,SLOT(DroppedCheckState()));
   connect(AckCheckBox,SIGNAL(stateChanged

(int)),this,SLOT(ACKCheckState()));

(⊙o⊙)…，突然发现有bug赶紧修改一下，就是红色字体。。。。完美了

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