WebKit - accessing javascript results + googleMap

[tpf80]

class DialogMap: public QDialog, private Ui::DialogMap {
 
	Q_OBJECT
 
	public:
		//functions:
		DialogMap(QWidget *parent = 0);
 
		//variables:
 
	private slots:
		void calcMap();
		void examineWait();
		void examinePage();
 
	private:
		bool examineSuccess;
		int examineTries;
		bool examinetimedout;
 
};
 
//setup interface of main window:
DialogMap::DialogMap(QWidget *parent) : QDialog(parent) {
 
 
	examineSuccess = false;
	examinetimedout = false;
	examineTries = 10;
 
 
	setupUi(this);
 
 
	//if we click on the button in the GUI we call that slot:
 
	connect(calcButton, SIGNAL(clicked()), this, SLOT(calcMap()));
 
	//this is to make sure the program examines the script after the map is first loaded:
 
	connect(webView, SIGNAL(loadFinished(bool)), this, SLOT(examineWait()));
	///////////////////////////////////////////////////////////////////
	//also can have other slots here, such as a "clicked" signal connecting to examinewait
	//for when the map is clicked by the user
	//or any other signal that might trigger you to examine the lat/lng in the map
	//////////////////////////////////////////////////////////////////////
 
 
 
	//load the view with the map page:
	webView->setUrl(QUrl("http://domain/map.html"));
 
 
 
}
 
 
//make the map process the GUi vars we pass to the javascript:
void DialogMap::calcMap() {
	//reset success to false because we have not examined it yet:
	examineSuccess = false;
	examinetimedout = false;
	examineTries = 10;
 
	//input the vars from our GUI into the google javascript
	QString javascript = QString("geocoder.getLocations(\"" + street->text() + " " + street2->text() + ", " + city->text() + ", " + state->currentText() + ", " + zip->text() + "\", showAddress);");
		webView->page()->currentFrame()->evaluateJavaScript(javascript);
	}
 
	//examine the map now that we sent an address to it
	examineWait();
 
}
 
 
 
//single shot timer, to wait to examine the map (lets google catch up)
//tune the time variable based on your load times
void DialogMap::examineWait() {
	QTimer::singleShot(1000, this, SLOT(examinePage()));
}
 
 
void DialogMap::examinePage() {
 
	QString javascript = QString("getlat()");
	QVariant lat = webView->page()->currentFrame()->evaluateJavaScript(javascript);
 
	javascript = QString("getlng()");
	QVariant lng = webView->page()->currentFrame()->evaluateJavaScript(javascript);
 
	examineTries--;
 
	//if we got results, then we can stop trying:
	if ((examineSuccess == false)&&(lat.toString() != "")&&(lng.toString() != "")) {
 
		//reset our tries for the next time the user clicks/requests an address
 
		examineSuccess = true;
		examineTries = 10;
 
		//since we grabbed the lat and lng, reset them to "", so we
		//don't pull them again out of the page until user selects a new
		//point
		javascript = QString("Lat = \"\";\nLng = \"\";");
		webView->page()->currentFrame()->evaluateJavaScript(javascript);
 
		////////////////////////////////////////////
		//do something with your lat and lng vars	here	
		////////////////////////////////////////////
 
	//if we found nothing then try again until examinetries has 0 left
	} else {
		//if we have tries left, then we try again:
		if ((examineSuccess == false)&&(examineTries > 0)) {
			examineWait();
		}
		if ((examineSuccess == false)&&(examineTries == 0)) {
			if (!examinetimedout) {
				//qDebug()<< "Timed out!";
				QMessageBox::critical(0, qApp->tr("Map Timed Out!"),
 
					qApp->tr("Loading Google Map timed out!\n\nPlease click \"Calculate >>\" to try again."), QMessageBox::Ok,
 
					QMessageBox::NoButton);
				examinetimedout = true;
			}
		}
	}
 
}

class DialogMap: public QDialog, private Ui::DialogMap {

	Q_OBJECT

	public:
		//functions:
		DialogMap(QWidget *parent = 0);

		//variables:

	private slots:
		void calcMap();
		void examineWait();
		void examinePage();

	private:
		bool examineSuccess;
		int examineTries;
		bool examinetimedout;
     
};

//setup interface of main window:
DialogMap::DialogMap(QWidget *parent) : QDialog(parent) {


	examineSuccess = false;
	examinetimedout = false;
	examineTries = 10;


	setupUi(this);


	//if we click on the button in the GUI we call that slot:

	connect(calcButton, SIGNAL(clicked()), this, SLOT(calcMap()));
	
	//this is to make sure the program examines the script after the map is first loaded:

	connect(webView, SIGNAL(loadFinished(bool)), this, SLOT(examineWait()));
	///////////////////////////////////////////////////////////////////
	//also can have other slots here, such as a "clicked" signal connecting to examinewait
	//for when the map is clicked by the user
	//or any other signal that might trigger you to examine the lat/lng in the map
	//////////////////////////////////////////////////////////////////////

	

	//load the view with the map page:
	webView->setUrl(QUrl("http://domain/map.html"));

	

}


//make the map process the GUi vars we pass to the javascript:
void DialogMap::calcMap() {
	//reset success to false because we have not examined it yet:
	examineSuccess = false;
	examinetimedout = false;
	examineTries = 10;
	
	//input the vars from our GUI into the google javascript
	QString javascript = QString("geocoder.getLocations(\"" + street->text() + " " + street2->text() + ", " + city->text() + ", " + state->currentText() + ", " + zip->text() + "\", showAddress);");
		webView->page()->currentFrame()->evaluateJavaScript(javascript);
	}

	//examine the map now that we sent an address to it
	examineWait();

}



//single shot timer, to wait to examine the map (lets google catch up)
//tune the time variable based on your load times
void DialogMap::examineWait() {
	QTimer::singleShot(1000, this, SLOT(examinePage()));
}


void DialogMap::examinePage() {

	QString javascript = QString("getlat()");
	QVariant lat = webView->page()->currentFrame()->evaluateJavaScript(javascript);
	
	javascript = QString("getlng()");
	QVariant lng = webView->page()->currentFrame()->evaluateJavaScript(javascript);

	examineTries--;
	
	//if we got results, then we can stop trying:
	if ((examineSuccess == false)&&(lat.toString() != "")&&(lng.toString() != "")) {
		
		//reset our tries for the next time the user clicks/requests an address

		examineSuccess = true;
		examineTries = 10;
		
		//since we grabbed the lat and lng, reset them to "", so we
		//don't pull them again out of the page until user selects a new
		//point
		javascript = QString("Lat = \"\";\nLng = \"\";");
		webView->page()->currentFrame()->evaluateJavaScript(javascript);
		
		////////////////////////////////////////////
		//do something with your lat and lng vars	here	
		////////////////////////////////////////////
		
	//if we found nothing then try again until examinetries has 0 left
	} else {
		//if we have tries left, then we try again:
		if ((examineSuccess == false)&&(examineTries > 0)) {
			examineWait();
		}
		if ((examineSuccess == false)&&(examineTries == 0)) {
			if (!examinetimedout) {
				//qDebug()<< "Timed out!";
				QMessageBox::critical(0, qApp->tr("Map Timed Out!"),

					qApp->tr("Loading Google Map timed out!\n\nPlease click \"Calculate >>\" to try again."), QMessageBox::Ok,

					QMessageBox::NoButton);
				examinetimedout = true;
			}
		}
	}

}

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[giusepped]

Did you try your code?
G

[tpf80]

Yes and it works. The example I posted is a good start but not totally complete. You would need to make the UI file in designer, add the code in main to exec the dialog, and of course some code to do something with the data you gathered.