在QTreeWidget中删除QTreeWidgetItem

我就想删除topLevelItem  stackoverflow上是这样说的:

http://stackoverflow.com/questions/9392051/how-do-i-delete-a-top-level-qtreewidgetitem-from-a-qtreewidget

http://stackoverflow.com/questions/9986231/getting-a-qtreewidgetitem-list-again-from-qtreewidget

 

以下代码ProjDataView这个类只是单纯继承QTreeWidget


 1 #include "ProjDataView.h"
 2 
 3 
 4 
 5 
 6 int main(int argc, char *argv[])
 7 {
 8 QApplication a(argc, argv);
 9 
10 
11 ProjDataView* dataView = new ProjDataView(0);
12 
13 for (int i = 0; i < 5; ++i){
14 
15 QTreeWidgetItem* item = new QTreeWidgetItem(QStringList() << QString("test") + QString::number(i));
16 
17 
18 dataView->addTopLevelItem(item);
19 
20 }
21 
22 
23 
24 
25 for (int i = 0; i < dataView->topLevelItemCount(); ++i){
26 
27 delete dataView->takeTopLevelItem(i);
28 
29 }
30 
31 
32 
33 
34 dataView->show();
35 
36 
37 
38 
39 
40 
41 //MyManagerWidget* mng = new MyManagerWidget(0);
42 
43 
44 //mng->show();
45 
46 return a.exec();
47 
48 }

 




 

如果用上述的代码是不对的,所以从窗口中看出才删除了test0,test2,test4.

如果要全删除的话可以这样:

while(dataView->topLevelItemCount() > 0){delete dataView->topLevelItem(0);}


那个for里边每执行一次dataView->topLevelItemCount()都会变化,

相应的dataView->topLevelItem(i),也是会变化的。完全不对。

 

不过我最终考虑用clear

参照这个:http://stackoverflow.com/questions/13062327/how-to-delete-qtreewidgetitem

 

references:

http://tieba.baidu.com/p/3849541021?pid=70405672647#70405672647

posted @ 2015-06-25 11:25  foo__hack  阅读(10536)  评论(0编辑  收藏  举报