更新/更改QListWidget项值

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

// 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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