Get confirmation that a key has reached JS

Konstantin Tokarev

@McLion You can set up handler for keydown or keypress in your JS code and send messages to console

McLion

Thanks.
Sounds like a plan ... going to try and post back.

McLion

Should something like the 2 console.log lines below give me some output on the console?
Excerpt from JS code:

case(event.keyCode >= 65 && event.keyCode <= 73): /* a..i */
                    var index = 0;
                    var rowNum = event.keyCode - 65;
                    var jBottommenuRows = $(this).children('.row');
                    console.log("JS");
                    console.log(event.keyCode);

Konstantin Tokarev

@McLion Yes

McLion

@Konstantin-Tokarev

OK, fine. What if there is nothing ... on the very same console all qDebug() perfectly appear?

Konstantin Tokarev

@McLion No, they go to JS console. You can see it in Inspector, or handle QWebPage::javaScriptConsoleMessage signal

McLion

@Konstantin-Tokarev

Ahhh ... OK ... Thanks a lot.
Never saw the 'Inspector' and will try to read it up ... is it also part of webKit in Qt?
I know the inspector on desktop browser but it won't help because it unfortunately does not show the issue there.
I'll try (tomorrow) to connect the signal to a slot and use qDebug() in there.

McLion

@McLion
Activated the inspector with the following line:
QWebSettings::globalSettings()->setAttribute(QWebSettings::DeveloperExtrasEnabled, true);
Basically works. However, as soon as I have the inspector turned on my webView's do behave very strange, like they do not get all inputs anymore, and I can not debug the situation.

Looks like I need to implement QWebPage::javaScriptConsoleMessage and send the messages back to C++ and debug from there.
According docs this is not a signal so I can not simply connect to it.

Konstantin Tokarev

@McLion Right, I've mixed it up with new consoleMessageReceived() signal that is present in revived QtWebKit only (since TP3)

McLion

@Konstantin-Tokarev
Need some help ...
I have the following:
in h:

#include <QWebPage>
class DBGWebPage : public QWebPage
{
Q_OBJECT
  public:
    explicit DBGWebPage(QObject *parent = 0);
  protected:
    void javaScriptConsoleMessage( const QString & message, int lineNumber, const QString & sourceID );
};

in cpp:

void DBGWebPage::javaScriptConsoleMessage( const QString & message, int lineNumber, const QString & sourceID )
{
  qDebug() << message << lineNumber << sourceID;
}

and my webGUI's are derived from qWebView:

QWebView *webGUI = new QWebView(QTGUI_MainWindow::centralWidget());

How do I make it use the reimplementation of javaScriptConsoleMessage()?

Konstantin Tokarev

@McLion QWebView::setPage

McLion

@Konstantin-Tokarev
Thanks .. seems to be too late for today ... I don't get it to build ... dam...

McLion

@Konstantin-Tokarev
There's something I don't get ... probably soemthing with these C++ classes I'm always stumbling over:

#include <QWebPage>
class DBGWebPage : public QWebPage
{
Q_OBJECT
  public:
    explicit DBGWebPage(QObject *parent = 0);
    QWebPage *DebugWebPage;
  protected:
    void javaScriptConsoleMessage( const QString & message, int lineNumber, const QString & sourceID );
};

DBGWebPage::DBGWebPage(QObject *parent) :
  QWebPage(parent)
{
  //QWebPage* DebugWebPage = new QWebPage;
  DebugWebPage = new QWebPage(this);
}

QWebView * QTGUI_MainWindow::CreateNewWebGUI(int iID)
{
  // check if already existing
  if(webGUIMap.value(iID) != 0) { qDebug("GUI %d existing", iID); return false; }

  // check for max GUI count here
  if(iID > GUI_COUNT_MAX) { qDebug("GUI %d failed - Max GUI ID is %d", iID, GUI_COUNT_MAX); return false; }

  // create new webGUI and add it to the list
  QWebView *webGUI = new QWebView(QTGUI_MainWindow::centralWidget());
  webGUIMap.insert(iID, webGUI);

  // make some basic settings to the new GUI
  webGUI->setPage(DBGWebPage::DebugWebPage);
  webGUI->setObjectName(QString::fromUtf8("webGUI%1").arg(iID));
......

Fehler:object missing in reference to 'DBGWebPage::DebugWebPage'

Konstantin Tokarev

This post is deleted!

mrjj

Hi
webGUI->setPage(DBGWebPage::DebugWebPage);
I would expect be something like
DBGWebPage *page=new DBGWebPage();
webGUI->setPage(page->DebugWebPage);

The other syntax seems odd ?

Konstantin Tokarev

@McLion You derive DBGWebPage from QWebPage and add QWebPage* field to it, then try to use that QWebPage* field (which is vanilla QWebPage, not DBGWebPage) as it was static filed of DBGWebPage.

McLion

@mrjj
Thanks.
In fact, the other syntax seemed wrong.
You code builds without error, however, crashes with SIGSEGV.

Konstantin Tokarev

@McLion Because it should be

DBGWebPage *page=new DBGWebPage();
webGUI->setPage(page);

McLion

I somehow understand all you're saying, but I so far am not able to modify my code to not crash.
Currently ended up with (modified to it while Konstantin was writing it too):

DBGWebPage *page=new DBGWebPage();
webGUI->setPage(page);

and an empty constructor.
Still crashing .... I'm stumped.

Konstantin Tokarev

remove DebugWebPage and all code messing with it