C++ QListWidget : 项目点击事件
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QListWidget : Event on item click
提问by Yanis Boucherit
Basically, what I have is the following :
基本上，我所拥有的是以下内容：
A QListWidget, with some items in it like this :
一个 QListWidget，其中有一些项目，如下所示：
ListMailis my QListWidget.
In this QListWidget, I have elements like : "Mail 1", "Mail 2", ...
ListMail是我的 QListWidget。在这个 QListWidget 中，我有这样的元素：“邮件 1”、“邮件 2”、...
And I don't have any idea, how can I make a signal on (for example) "Mail 1" bind to a slot(onClick) or something like that.
而且我不知道如何在（例如）“邮件 1”绑定到插槽（onClick）或类似的东西上发出信号。
I already tried things like :
connect(ui->listMail->selectedItems(0), SIGNAL(triggered()), this, SLOT(openMessage()), but it doesn't work at all...
我已经尝试过诸如 : 之类的东西
connect(ui->listMail->selectedItems(0), SIGNAL(triggered()), this, SLOT(openMessage())，但它根本不起作用......
Any help ?
有什么帮助吗？
Thanks !
谢谢 ！
回答by andref
You must bind to the itemClickedsignal. The signal will provide you with a QListWidgetItem*which is the item that was clicked. You can then examine it and check if it is the first one:
您必须绑定到itemClicked信号。该信号将为您提供QListWidgetItem*被点击的项目。然后您可以检查它并检查它是否是第一个：
MyClass::MyClass(QWidget* parent)
: QWidget(parent)
{
connect(ui->listMail, SIGNAL(itemClicked(QListWidgetItem*)),
this, SLOT(onListMailItemClicked(QListWidgetItem*)));
}
void MyClass::onListMailItemClicked(QListWidgetItem* item)
{
if (ui->listMail->item(0) == item) {
// This is the first item.
}
}
回答by Anthony
QListWidget has a signal QListWidget::itemPressed(QListWidgetItem *item)that will tell you which item was clicked. You can connect this signal to your own slot. There are also other related signals. See the documentation.
QListWidget 有一个信号QListWidget::itemPressed(QListWidgetItem *item)会告诉你哪个项目被点击。您可以将此信号连接到您自己的插槽。还有其他相关信号。请参阅文档。
