Handle events from browser control DG::Browser

[Martin Walter]

How can I recognize an event from the browser control DG::Browser, for example the URLChanged which is declared in BrowserBase?

[Ralph Wessel]

Use the += operator of BrowserBase::urlChanged to add a Runnable callback function to respond to this event.

[Martin Walter]

Sorry I'm not able to make it. My code does not compile in this line:

DGEventNotifier<BrowserBase, DG::BrowserURLChangedArg>::Runnable func = &UIBrowser::URLChanged;

Can you please tell me what is wrong?

My whole code is:

class UIBrowser: public DG::Browser
{
public:
	UIBrowser(const DG::Panel& panel, short item);

private:
	virtual void URLChanged(const DG::BrowserURLChangedArg& eventArg) override;
};

UIBrowser::UIBrowser(const DG::Panel& panel, short item) :
	DG::Browser(panel, item)
{
	DGEventNotifier<BrowserBase, DG::BrowserURLChangedArg>::Runnable func = &UIBrowser::URLChanged;
	this->urlChanged += func;
}

void UIBrowser::URLChanged(const DG::BrowserURLChangedArg& eventArg)
{
...
}

[Ralph Wessel]

Martin wrote:
I'm not able to make it. My code does not compile in this line:

DGEventNotifier<BrowserBase, DG::BrowserURLChangedArg>::Runnable func = &UIBrowser::URLChanged;

Try changing this to:

this->urlChanged += DGEventNotifier<DG::BrowserBase, DG::BrowserURLChangedArg>::Runnable(UIBrowser::URLChanged);

[Martin Walter]

that doesn't compile too.
and neither:

this->urlChanged += DGEventNotifier<DG::BrowserBase, DG::BrowserURLChangedArg>::Runnable(&UIBrowser::URLChanged);

[Ralph Wessel]

The urlChanged function should look more like this:

void UIBrowser::URLChanged(const DG::BrowserBase& source, const DG::BrowserURLChangedArg& eventArg)

[Martin Walter · Accepted solution]

Obviously the callback function can not be defined in a class. I got it working finally this way:

void handleURLChanged(const DG::BrowserBase& source, const DG::BrowserURLChangedArg& eventArg);

m_browser.urlChanged += DGEventNotifier<DG::BrowserBase, DG::BrowserURLChangedArg>::Runnable(&handleURLChanged);