请问QTreeWidgetItem::setText()调用后如何实时刷新界面.  #3

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1. xy-app commented on Aug 18, 2020

   

   xy-app

   on Aug 18, 2020

   Last edited by xy-app

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   理論上 QTreeWidgetItem::setText(int column, const QString &text) 之後應該不需要刷新。

   可以試試 QTreeWidget的update函數

   void update(const QModelIndex &index)
   
   Updates the area occupied by the given index.
   
2. xy-app commented on Aug 18, 2020

   

   xy-app

   on Aug 18, 2020

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   很可能是你的顯卡問題，你在什麽系統上做應用？
3. JoneyYang commented on Aug 18, 2020

   

   JoneyYang

   on Aug 18, 2020

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   很可能是你的顯卡問題，你在什麽系統上做應用？

   我的环境是 Win10 , Qt 5.14.

   我猜测是QT为了效率, 并不会立即绘制Item。 因为我发现，在Tree里面新插入一项，整个 Tree会立即刷新， 但是setText并不会。

   update函数我尝试过， 但并没有效果。
4. xy-app commented on Aug 18, 2020

   

   xy-app

   on Aug 18, 2020

   Last edited by xy-app

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   https://youtu.be/c8ZZ6h8rbtE
   ui->treeWidget->topLevelItem(0)->child(0)->setText(0, ui->lineEdit->text());
   Example

   👍React with 👍1Reacted by JoneyYang
5. shangfire commented on Aug 17, 2023

   

   shangfire

   on Aug 17, 2023

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   使用dataChanged(QModelIndex(), QModelIndex());