没有这样的信号 QTableWidget::cellChanged(int, int)

发布于 2024-08-20 04:32:30 字数 331 浏览 12 评论 0原文

标题很好地描述了我的问题。

有问题的代码行：

connect(table, SIGNAL(cellChanged(row, 5)), this, SLOT(updateSP()));

我想不出该信号无效的原因。我用谷歌搜索了一下，发现有几个人有同样的问题，但那里提出的解决方案不起作用。

我在 Ubuntu Karmic、g++ 上使用 Qt 4.5.2。

有人知道我做错了什么吗？ Trolltech 关于 cellChanged() 的文档没有提到任何特殊要求。

我不知所措。

感谢您的任何建议！

原文

The title describes my problem quite well.

The offending line of code:

connect(table, SIGNAL(cellChanged(row, 5)), this, SLOT(updateSP()));

I can think of no reason why that signal is not valid. I googled around, and found a couple people with the same problem, but the solutions posed there don't work.

I'm using Qt 4.5.2 on Ubuntu Karmic, g++.

Anyone know what I am doing wrong? Trolltech's documentation regarding cellChanged() doesn't mention any special requirements.

I'm at a loss.

Thanks for any advice!

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烟雨凡馨 2024-08-27 04:32:30

在我看来，您不理解 Qt 的信号和槽概念。 SIGNAL & ; SLOT 宏采用接口。类似的东西

connect(table, SIGNAL(cellChanged(int, int)), this, SLOT(updateSP()));

可能会起作用，但你的插槽中需要有相同的参数计数，才能使其像你期望的那样工作：

connect(table, SIGNAL(cellChanged(int, int)), this, SLOT(updateSP(int, int)));

插槽应该看起来像这样：

void ClassFoo::updateSP(int row, int column)
{
  // row is the number of row that was clicked;
  // column is the number of column that was clicked;
  // Here we go! It's right place to do some actions. =)
}

it seems for me that you don't understand Qt's Signals and Slots concepts. The SIGNAL & SLOT macro take an interface. Something like

connect(table, SIGNAL(cellChanged(int, int)), this, SLOT(updateSP()));

might work but you need to have same argument count in your slot, to make it work like you expect:

connect(table, SIGNAL(cellChanged(int, int)), this, SLOT(updateSP(int, int)));

Slot should look something like this:

void ClassFoo::updateSP(int row, int column)
{
  // row is the number of row that was clicked;
  // column is the number of column that was clicked;
  // Here we go! It's right place to do some actions. =)
}

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