Load form mdi child plugin

[estanisgeyer]

Hi guys,

I'm creating a plugin that contains a form. How can I load this plugin as a child window in an application mdi?

Thanks,

Marcelo E. Geyer

[jpn]

What did you try so far? How does the plugin create the widget?

class PluginInterface
{
public:
   ...
   QWidget* createForm(QWidget* parent = 0) = 0;
   ...
};

class PluginInterface
{
public:
   ...
   QWidget* createForm(QWidget* parent = 0) = 0;
   ...
};

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[estanisgeyer]

I have no idea how this implementation. I will post here in the code. Anyway, I will try to take the hint and make us their tests here.

RecInterface.h:

#ifndef RECINTERFACE_H
#define RECINTERFACE_H
 
#include <QtPlugin>
#include <QWidget>
 
class ReceberInterface: public QWidget
{
	public:
		virtual ~RecInterface() {}
		virtual QString getIcon() const = 0;
		virtual QString typeInterface() const = 0;
		virtual QString statustipInterface() const = 0;
		virtual QString menuInterface() const = 0;
 
	private:
};
 
Q_DECLARE_INTERFACE(RecInterface, "snet.RecInterface/1.0")
 
#endif

#ifndef RECINTERFACE_H
#define RECINTERFACE_H

#include <QtPlugin>
#include <QWidget>

class ReceberInterface: public QWidget
{
	public:
		virtual ~RecInterface() {}
		virtual QString getIcon() const = 0;
		virtual QString typeInterface() const = 0;
		virtual QString statustipInterface() const = 0;
		virtual QString menuInterface() const = 0;

	private:
};

Q_DECLARE_INTERFACE(RecInterface, "snet.RecInterface/1.0")

#endif

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Rec.h:

#ifndef REC_H
#define REC_H
 
#include <QtGui>
#include "ui_Rec.h"
#include "RecInterface.h"
 
class Rec: public RecInterface
{
	Q_OBJECT
	Q_INTERFACES(RecInterface)
 
	public:
		Rec();
		virtual ~Rec();
 
		QString getIcon() const;
		QString typeInterface() const;
		QString statustipInterface() const;
		QString menuInterface() const;
 
	private:
		Ui::Form_Rec ui;
 
	protected:
 
};
 
#endif

#ifndef REC_H
#define REC_H

#include <QtGui>
#include "ui_Rec.h"
#include "RecInterface.h"

class Rec: public RecInterface
{
	Q_OBJECT
	Q_INTERFACES(RecInterface)

	public:
		Rec();
		virtual ~Rec();

		QString getIcon() const;
		QString typeInterface() const;
		QString statustipInterface() const;
		QString menuInterface() const;

	private:
		Ui::Form_Rec ui;
		
	protected:
	
};

#endif

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Rec.cpp:

#include "Rec.h"
 
Rec::Rec()
{
	qDebug() << "Rec is load...";
}
 
Rec::~Rec()
{
 
}
 
QString Rec::getIcon() const
{
	QString icon = ":/imagens/contas_rec.png";
	return icon;
}
 
QString Rec::typeInterface() const
{
	QString tipo = "Account Rec...";
	return tipo;
}
 
QString Rec::statustipInterface() const
{
	QString statustip = "Account Rec...";
	return statustip;
}
 
QString Rec::menuInterface() const
{
	QString menu = "&Account";
	return menu;
}
 
Q_EXPORT_PLUGIN2(librec, Rec)

#include "Rec.h"

Rec::Rec()
{
	qDebug() << "Rec is load...";
}

Rec::~Rec()
{

}

QString Rec::getIcon() const
{
	QString icon = ":/imagens/contas_rec.png";
	return icon;
}

QString Rec::typeInterface() const
{
	QString tipo = "Account Rec...";
	return tipo;
}

QString Rec::statustipInterface() const
{
	QString statustip = "Account Rec...";
	return statustip;
}

QString Rec::menuInterface() const
{
	QString menu = "&Account";
	return menu;
}

Q_EXPORT_PLUGIN2(librec, Rec)

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Thanks,

Marcelo E. Geyer

[jpn]

First of all, the plugin interface must be a class with pure virtual functions only, thus you cannot make it inherit QWidget. Secondly, you should write a function which creates and returns a widget. This way you can control the life time of the widget properly.

For more details, see How to Create Qt Plugins - The Lower-Level API: Extending Qt Applications.

[estanisgeyer]

Thanks for hints!
I'm resolved the problem, follow below the code:

MainWindow.cpp:

void MainWindow::slotShowPlugin()
{
	QAction *act = qobject_cast<QAction *>(sender());
	RecInterface *interface = qobject_cast<RecInterface *>(act->parent());
 
	QMdiSubWindow *mdiSubWin = new QMdiSubWindow;
	mdiSubWin->setWidget(interface->createWidget());
	mdiSubWin->setAttribute(Qt::WA_DeleteOnClose);
	mdiArea->addSubWindow(mdiSubWin);
	mdiSubWin->show();
}

void MainWindow::slotShowPlugin()
{
	QAction *act = qobject_cast<QAction *>(sender());
	RecInterface *interface = qobject_cast<RecInterface *>(act->parent());

	QMdiSubWindow *mdiSubWin = new QMdiSubWindow;
	mdiSubWin->setWidget(interface->createWidget());
	mdiSubWin->setAttribute(Qt::WA_DeleteOnClose);
	mdiArea->addSubWindow(mdiSubWin);
	mdiSubWin->show();
}

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RecInterface.h

#include <QtPlugin>
#include <QWidget>
 
class RecInterface
{
	public:
		virtual QWidget *createWidget(QWidget *parent = 0) = 0;
		virtual ~RecInterface() {};
		virtual QString getIcon() const = 0;
		virtual QString tipoInterface() const = 0;
		virtual QString statustipInterface() const = 0;
		virtual QString menuInterface() const = 0;
 
	private:
};
 
Q_DECLARE_INTERFACE(RecInterface, "snet.RecInterface/1.0")
 
#endif

#include <QtPlugin>
#include <QWidget>

class RecInterface
{
	public:
		virtual QWidget *createWidget(QWidget *parent = 0) = 0;
		virtual ~RecInterface() {};
		virtual QString getIcon() const = 0;
		virtual QString tipoInterface() const = 0;
		virtual QString statustipInterface() const = 0;
		virtual QString menuInterface() const = 0;

	private:
};

Q_DECLARE_INTERFACE(RecInterface, "snet.RecInterface/1.0")

#endif

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Rec.h:

#include <QWidget>
#include <QtDebug>
#include "ui_Rec.h"
#include "RecInterface.h"
 
class RecWidget;
class Rec: public QWidget, public RecInterface
{
	Q_OBJECT
	Q_INTERFACES(RecInterface)
 
	public:
		Rec(QWidget *parent = 0);
		virtual ~Rec();
		QWidget *createWidget(QWidget *parent = 0);
		QString getIcon() const;
		QString tipoInterface() const;
		QString statustipInterface() const;
		QString menuInterface() const;
 
		RecWidget *recWid;
 
	private:
 
	protected:
 
};
 
class RecWidget: public QWidget
{
	Q_OBJECT
	public:
		RecWidget(QWidget *parent = 0);
		virtual ~RecWidget();
 
	private:
		Ui::Form_Rec ui;
 
	protected:
 
};
 
#endif

#include <QWidget>
#include <QtDebug>
#include "ui_Rec.h"
#include "RecInterface.h"

class RecWidget;
class Rec: public QWidget, public RecInterface
{
	Q_OBJECT
	Q_INTERFACES(RecInterface)

	public:
		Rec(QWidget *parent = 0);
		virtual ~Rec();
		QWidget *createWidget(QWidget *parent = 0);
		QString getIcon() const;
		QString tipoInterface() const;
		QString statustipInterface() const;
		QString menuInterface() const;

		RecWidget *recWid;

	private:

	protected:
	
};

class RecWidget: public QWidget
{
	Q_OBJECT
	public:
		RecWidget(QWidget *parent = 0);
		virtual ~RecWidget();

	private:
		Ui::Form_Rec ui;
		
	protected:
	
};

#endif

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Rec.cpp:

#include "Rec.h"
 
Rec::Rec(QWidget *parent)
	:QWidget(parent)
{
	qDebug() << "Loading rec...";
}
 
Rec::~Rec()
{
 
}
 
QString Rec::getIcon() const
{
	QString icon = ":/imagens/nf.png";
	return icon;
}
QString Rec::tipoInterface() const
{
	QString tipo = "Plugin Rec...";
	return tipo;
}
 
QString Rec::statustipInterface() const
{
	QString statustip = "Account Rec...";
	return statustip;
}
 
QString Rec::menuInterface() const
{
	QString menu = "&Account";
	return menu;
}
 
QWidget *Rec::createWidget(QWidget *parent)
{
	recWid = new RecWidget(this);
	return recWid;
}
 
Q_EXPORT_PLUGIN2(librec, Rec)
 
 
RecWidget::RecWidget(QWidget *parent)
	:QWidget(parent)
{
	qDebug() << "Loading form...";
	ui.setupUi(this);
}
 
RecWidget::~RecWidget()
{
 
}

#include "Rec.h"

Rec::Rec(QWidget *parent)
	:QWidget(parent)
{
	qDebug() << "Loading rec...";
}

Rec::~Rec()
{

}

QString Rec::getIcon() const
{
	QString icon = ":/imagens/nf.png";
	return icon;
}
QString Rec::tipoInterface() const
{
	QString tipo = "Plugin Rec...";
	return tipo;
}

QString Rec::statustipInterface() const
{
	QString statustip = "Account Rec...";
	return statustip;
}

QString Rec::menuInterface() const
{
	QString menu = "&Account";
	return menu;
}

QWidget *Rec::createWidget(QWidget *parent)
{
	recWid = new RecWidget(this);
	return recWid;
}

Q_EXPORT_PLUGIN2(librec, Rec)


RecWidget::RecWidget(QWidget *parent)
	:QWidget(parent)
{
	qDebug() << "Loading form...";
	ui.setupUi(this);
}

RecWidget::~RecWidget()
{

}

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