custom signals

[talk2amulya]

do we have to declare smth extra to use custom signals(our own defined signals)?

[spirit]

what do you mean? all what you need it add Q_OBJECT and emit for emitting a signal.

[jogeshwarakundi]

and if you wish to use your own data type as parameter, register it with the metatype system

[talk2amulya]

i declared the following signal in a class

signals:
	void buttonClicked(int index);

signals:
	void buttonClicked(int index);

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and used the signal in a different class, to connect to a slot

bool isConnect = connect(_visualBrowsingWidget->_buttonContainer, SIGNAL(buttonClicked(int index)), this, SLOT(showCorrectWidget(int index)));

bool isConnect = connect(_visualBrowsingWidget->_buttonContainer, SIGNAL(buttonClicked(int index)), this, SLOT(showCorrectWidget(int index)));

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but signal doesnt connect, saying:

Object::connect: No such signal ViewButtonContainer::buttonClicked(int index)

Object::connect: No such signal ViewButtonContainer::buttonClicked(int index)

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i m sure i have used own signals before, so i m wondering why this is happening. do i have to declare the signal somewhere else also?

[spirit]

show us declaration of ViewButtonContainer.

[jogeshwarakundi]

inside the connect statement, you should not specify the parameter name....

connect(...SIGNAL(sometingHappened(int))....);

[talk2amulya]

here, the signal is declared:

class ViewButtonContainer : public QWidget
{
	Q_OBJECT
 
public:
	ViewButtonContainer(QWidget *parent);
	~ViewButtonContainer();
 
	enum ButtonIndex
	{
		VISUAL_BROWSING_VIEW,
		JOB_SETTINGS_VIEW,
		LIST_VIEW
	};
 
private:
	QPushButton *_visualBrowsingViewButton;
	QPushButton *_jobSettingsViewButton;
	QPushButton *_listViewButton;
 
private Q_SLOTS:
	void handleClicked(bool);
 
signals:
	void buttonClicked(int index);
};

class ViewButtonContainer : public QWidget
{
	Q_OBJECT

public:
	ViewButtonContainer(QWidget *parent);
	~ViewButtonContainer();

	enum ButtonIndex
	{
		VISUAL_BROWSING_VIEW,
		JOB_SETTINGS_VIEW,
		LIST_VIEW
	};

private:
	QPushButton *_visualBrowsingViewButton;
	QPushButton *_jobSettingsViewButton;
	QPushButton *_listViewButton;

private Q_SLOTS:
	void handleClicked(bool);

signals:
	void buttonClicked(int index);
};

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here, the signal containing class is used

class VisualBrowsingView : public QWidget
{
    Q_OBJECT
 
public:
    VisualBrowsingView(QWidget* parent = 0);
    ~VisualBrowsingView();
 
	ViewButtonContainer *_buttonContainer;

class VisualBrowsingView : public QWidget
{
    Q_OBJECT

public:
    VisualBrowsingView(QWidget* parent = 0);
    ~VisualBrowsingView();

	ViewButtonContainer *_buttonContainer;

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above class's object is used here to get the signal and call the slot

class StackedWidget : public PScreen, public IJobMgrView
{
	Q_OBJECT
 
public:
	StackedWidget(IMS1Shell *parent, IJobMgrControl *control );
	~StackedWidget();
 
VisualBrowsingView *_visualBrowsingWidget;
	ListView *_listWidget;
 
private Q_SLOTS:
	void showCorrectWidget(int index);

class StackedWidget : public PScreen, public IJobMgrView
{
	Q_OBJECT

public:
	StackedWidget(IMS1Shell *parent, IJobMgrControl *control );
	~StackedWidget();

VisualBrowsingView *_visualBrowsingWidget;
	ListView *_listWidget;

private Q_SLOTS:
	void showCorrectWidget(int index);

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[spirit]

jogeshwarakundi already pointed on a problem

[talk2amulya]

stupid mistake, sorry for wasting ur time guys, this should have been caught by me..copy/paste sux!!

[jogeshwarakundi]

jogeshwarakundi already pointed on a problem

interestingly, there is a "thanks" button but then no "you are welcome" button