C++ 如何将焦点返回到窗口?
关闭MessageBox后,焦点自身不会返回窗口。我试过:C++ 如何将焦点返回到窗口?,c++,qt,qt-designer,qtgui,qmessagebox,C++,Qt,Qt Designer,Qtgui,Qmessagebox,关闭MessageBox后,焦点自身不会返回窗口。我试过: QMessageBox msgBox; msgBox.setText("Ok"); msgBox.exec(); this->setFocus(); 如何将焦点返回到主窗口(此) //dialog.h #ifndef对话框 #定义对话框 #包括 名称空间用户界面{ 类对话框; } 类对话框:公共QDialog { Q_对象 公众: 显式对话框(QWidget*parent=0); void loadFile(); ~Dialog
QMessageBox msgBox;
msgBox.setText("Ok");
msgBox.exec();
this->setFocus();
如何将焦点返回到主窗口(此
)
//dialog.h
#ifndef对话框
#定义对话框
#包括
名称空间用户界面{
类对话框;
}
类对话框:公共QDialog
{
Q_对象
公众:
显式对话框(QWidget*parent=0);
void loadFile();
~Dialog();
专用插槽:
单击按钮时无效添加2();
私人:
Ui::Dialog*Ui;
};
#endif//对话框
//dialog.cpp
//
#包括“dialog.h”
#包括“ui_dialog.h”
#包括
#包括
#包括
#包括
#包括
#包括
#包括
#包括
#包括
#包括
#包括
Dialog::Dialog(QWidget*父项):
QDialog(父级),
ui(新建ui::对话框)
{
这->setFocusPolicy(Qt::StrongFocus);
用户界面->设置用户界面(此);
}
void Dialog::loadFile()
{
QString urlForXML=”http://apifree.forvo.com/key//format/xml/action/word-pronunciations/word/";
urlForXML+=ui->textHttp->toPlainText()++“/language/de”;
QNetworkAccessManager m_NetworkMngr;
QNetworkReply*reply=m_NetworkMngr.get(QNetworkRequest(urlForXML));
QEventLoop循环;
连接(应答、信号(finished())、循环和插槽(quit());
loop.exec();
QXmlStreamReader;
addData(reply->readAll());
QString路径mp3url;
而(!xmlReader.atEnd())//。。。
{
xmlReader.readNextStartElement();//
如果(xmlReader.name()=“pathm3”)//
{
pathmp3Url=xmlReader.readElementText();
打破
}
}
删除答复;
if(pathmp3Url.count())
{
QNetworkAccessManager m_NetworkMngr2;
QNetworkReply*reply2=m_NetworkMngr2.get(QNetworkRequest(pathmp3Url));
QEventLoop循环2;
连接(reply2,信号(finished()),&loop2,插槽(quit());
loop2.exec();
QString QString_mp3file=“/users/derkode/documents/forvoclient-mp3/”+ui->textHttp->toPlainText()+“.mp3”;
QFile mp3_文件(qstring_mp3文件);
打开mp3_文件(QIODevice::WriteOnly);
mp3_file.write(reply2->readAll());
QMediaPlayer*player=新的QMediaPlayer;
player->setMedia(QUrl::fromLocalFile(qstring_mp3file));
播放器->设置音量(50);
player->play();
mp3_文件.close();
删除答复2;
}
其他的
{
QMessageBox*msgBox=新的QMessageBox(此);
msgBox->setText(“确定”);
msgBox->exec();
此->设置焦点();
}
}
对话::~Dialog()
{
删除用户界面;
}
无效对话框::在按钮上单击鼠标左键()
{
loadFile();
}
此->父对象()->setFocus();在msgBox->exec()之后(代码末尾附近)另一个窗口获得焦点吗?或者焦点在哪里?另外,你能提供一个独立的例子吗?@itwasntpee,是的-msgBox
获得焦点,但是在关闭msgBox
后需要通过鼠标激活主窗口。这是什么?主窗口?请粘贴更多的代码…写一个插槽,当你的msgbox关闭时触发,并将焦点带回主窗口,怎么样?试过了吗?
//dialog.h
#ifndef DIALOG_H
#define DIALOG_H
#include <QDialog>
namespace Ui {
class Dialog;
}
class Dialog : public QDialog
{
Q_OBJECT
public:
explicit Dialog(QWidget *parent = 0);
void loadFile();
~Dialog();
private slots:
void on_buttonLoad2_clicked();
private:
Ui::Dialog *ui;
};
#endif // DIALOG_H
//dialog.cpp
//
#include "dialog.h"
#include "ui_dialog.h"
#include <QDebug>
#include <QXmlStreamReader>
#include <QNetworkAccessManager>
#include <QNetworkReply>
#include <QEvent>
#include <QDomDocument>
#include <QDomElement>
#include <QFile>
#include <QMessageBox>
#include <QMediaPlayer>
#include <QListWidgetItem>
Dialog::Dialog(QWidget *parent) :
QDialog(parent),
ui(new Ui::Dialog)
{
this->setFocusPolicy(Qt::StrongFocus);
ui->setupUi(this);
}
void Dialog::loadFile()
{
QString urlForXML = "http://apifree.forvo.com/key//format/xml/action/word-pronunciations/word/";
urlForXML += ui->textHttp->toPlainText() + "/language/de";
QNetworkAccessManager m_NetworkMngr;
QNetworkReply *reply = m_NetworkMngr.get(QNetworkRequest(urlForXML));
QEventLoop loop;
connect(reply, SIGNAL(finished()),&loop, SLOT(quit()));
loop.exec();
QXmlStreamReader xmlReader;
xmlReader.addData(reply->readAll());
QString pathmp3Url;
while(!xmlReader.atEnd()) // пока не конец потока...
{
xmlReader.readNextStartElement(); // читаем следующий открывающий элемент (тег)
if (xmlReader.name() == "pathmp3") // если имя элемента "pathmp3"
{
pathmp3Url = xmlReader.readElementText();
break;
}
}
delete reply;
if(pathmp3Url.count())
{
QNetworkAccessManager m_NetworkMngr2;
QNetworkReply *reply2 = m_NetworkMngr2.get(QNetworkRequest(pathmp3Url));
QEventLoop loop2;
connect(reply2, SIGNAL(finished()), &loop2, SLOT(quit()));
loop2.exec();
QString qstring_mp3file = "/users/derkode/documents/forvoclient-mp3/" + ui->textHttp->toPlainText() + ".mp3";
QFile mp3_file(qstring_mp3file);
mp3_file.open(QIODevice::WriteOnly);
mp3_file.write(reply2->readAll());
QMediaPlayer *player = new QMediaPlayer;
player->setMedia(QUrl::fromLocalFile(qstring_mp3file));
player->setVolume(50);
player->play();
mp3_file.close();
delete reply2;
}
else
{
QMessageBox *msgBox = new QMessageBox(this);
msgBox->setText("Ok");
msgBox->exec();
this->setFocus();
}
}
Dialog::~Dialog()
{
delete ui;
}
void Dialog::on_buttonLoad2_clicked()
{
loadFile();
}