QDesktopServices::openUrl() slow

[Netheril]

Hi rbp, I don't if you have already solve the problem of the slowness of opening the url, but in the team I'm working, we have found a solution. The problem (and I don't know why) is that while you're working inside the environment of Qt (QtCreator) it took the 30-40 sec to open the browser and show the url. But, if you run the .exe of your appllication (avoiding first the problem of loading the dlls, ie. mingwm10.dll, QtCore4.dll, QtGui4.dll, etc.) The url problem disappears. So my advice is to you keep working and when you realease your app, you would have no delay problems.

Note: I have Windows Xp, QtCreator 2.0.0, Qt 4.7.0 (32 bits).

[rbp]

thanks for the tip.

[enwillyado]

Para evitar que la aplicación se congele... usa un hilo:
To prevent the application from freezing ... a thread can be used:

The thread:

#include <QUrl>
#include <QDesktopServices>
#include <QThread>
#include <QLabel>
#include <QHBoxLayout>
class MyThread : public QThread {
public:
    MyThread(QUrl, QWidget* = 0);
    void closePopUp();
    void run();
private:
    QUrl url;
    QWidget* qW;
};
 
MyThread::MyThread(QUrl u, QWidget* w ){
    url = u;
    qW = w;
}
void MyThread::closePopUp(){
    if( qW ){
	qW->~QWidget();
	qW = 0;
    }
}
void MyThread::run() {
    QDesktopServices::openUrl(url);
    closePopUp();
    terminate();
    wait();
}

#include <QUrl>
#include <QDesktopServices>
#include <QThread>
#include <QLabel>
#include <QHBoxLayout>
class MyThread : public QThread {
public:
    MyThread(QUrl, QWidget* = 0);
    void closePopUp();
    void run();
private:
    QUrl url;
    QWidget* qW;
};

MyThread::MyThread(QUrl u, QWidget* w ){
    url = u;
    qW = w;
}
void MyThread::closePopUp(){
    if( qW ){
	qW->~QWidget();
	qW = 0;
    }
}
void MyThread::run() {
    QDesktopServices::openUrl(url);
    closePopUp();
    terminate();
    wait();
}

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The functions:

QWidget* createPopUp(QUrl url){
    QWidget* qW = new QWidget();
    QLabel* qLabel = new QLabel(qW);
    qLabel->setText( url.toString() );
    QLayout* qL = new QHBoxLayout(qW);
    qL->addWidget(qLabel);
    qW->setLayout(qL);
    qW->setWindowFlags( Qt::CustomizeWindowHint | Qt::WindowTitleHint | Qt::SubWindow
						| Qt::WindowStaysOnTopHint );
    qW->setWindowTitle("Opening url...");
    qW->show();
    qW->setFixedSize(qW->width(), qW->height() );
    return qW;
}
MyThread* open_browser(const QString& rUrl, bool b = false ){
    QUrl url = QUrl(rUrl, QUrl::TolerantMode);
    MyThread* hilo;
    if( b ){
        hilo = new MyThread(url, createPopUp(url));
    }else{
        hilo = new MyThread(url);
    }
    hilo->start();
    return hilo;
}

QWidget* createPopUp(QUrl url){
    QWidget* qW = new QWidget();
    QLabel* qLabel = new QLabel(qW);
    qLabel->setText( url.toString() );
    QLayout* qL = new QHBoxLayout(qW);
    qL->addWidget(qLabel);
    qW->setLayout(qL);
    qW->setWindowFlags( Qt::CustomizeWindowHint | Qt::WindowTitleHint | Qt::SubWindow
						| Qt::WindowStaysOnTopHint );
    qW->setWindowTitle("Opening url...");
    qW->show();
    qW->setFixedSize(qW->width(), qW->height() );
    return qW;
}
MyThread* open_browser(const QString& rUrl, bool b = false ){
    QUrl url = QUrl(rUrl, QUrl::TolerantMode);
    MyThread* hilo;
    if( b ){
        hilo = new MyThread(url, createPopUp(url));
    }else{
        hilo = new MyThread(url);
    }
    hilo->start();
    return hilo;
}

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The usage:

/*only open*/
open_browser("http://www.ewaewa.com/");
 
/*open with popup but immediately it is closed*/
MyThread* hilo = open_browser("http://www.ewaewa.com/",true);
hilo->closePopUp();
 
/*open with popup and close automatically when URL is opened*/
open_browser("http://www.ewaewa.com/",true);

/*only open*/
open_browser("http://www.ewaewa.com/");

/*open with popup but immediately it is closed*/
MyThread* hilo = open_browser("http://www.ewaewa.com/",true);
hilo->closePopUp();

/*open with popup and close automatically when URL is opened*/
open_browser("http://www.ewaewa.com/",true);

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