更新/更改QListWidget项值 [英] update/change QListWidget item value

问题描述

我创建了一个包含一些项目（3行）的Qlistwidget

总错误:: __

总警告:: __

总计Voilations :: __







我想知道如何在执行时更新每个项目的QListWidget线？我有QListWidget（ErrCount，WarCount，VCount）的每个项目的计数器变量。所有计数器最初都为零。



谢谢

I have created a Qlistwidget having some items(3 rows)
Total Errors:: __
Total Warnings:: __
Total Voilations:: __



I want to know how to update the QListWidget each item while executing the thread? I have counter variable for each item of the QListWidget(ErrCount, WarCount, VCount). All Counters are zero initially.

Thanks

推荐答案

如果更新应由另一个线程启动，你应该为此创建一个事件：

If the update should be initiated by another thread, you should create an event for that:

// MyDialog.h
// This must be unique for the application.
#define UPDATE_COUNT_EV QEvent::User

class UpdateCountEvent : public QEvent
{
public:
    UpdateCountEvent(int err, int warn, int v) :
        QEvent((QEvent::Type)UPDATE_COUNT_EV),
        errCount(err),
        warnCount(warn),
        vCount(v)
    {
    }
    int errCount;
    int warnCount;
    int vCount;
};

class MyDialog : public QDialog
{
    // ...
    void customEvent(QEvent *event);
};

// MyDialog.cpp
void MyDialog::customEvent(QEvent *event)
{
    if (static_cast<int>(event->type()) == UPDATE_COUNT_EV)
    {
        const UpdateCountEvent *ev = static_cast<const updatecountevent="">(event);
        ui->listWidget->item(0)->setText(QString("Total Errors: %1").arg(ev->errCount));
        ui->listWidget->item(1)->setText(QString("Total Warnings: %1").arg(ev->warnCount));
        ui->listWidget->item(2)->setText(QString("Total Violations: %1").arg(ev->vCount));
    }
}
</const></int>

活动可以现在从另一个线程发送（需要包含定义 UpdateCountEvent 的标头和指向对话框小部件的指针）：

The event can now be send from another thread (requires inclusion of the header that defines UpdateCountEvent and a pointer to the dialog widget):

QCoreApplication::postEvent(pDialogWidget, new UpdateCountEvent(ErrCount, WarnCount, VCount));

如果您只想更新单个值，创建三个事件并相应地更新 MyDialog :: customEvent 中的列表项。

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