QT 4.4 QGraphicsProxyWidget bridge Drag and Drop help

[patrik08]

I can not forward Drag and Drop is here more flag to set?

QGraphicsProxyWidget not forward events to subwidged

#include <QGraphicsScene>
#include <QtGui>
#include <QGraphicsProxyWidget>
#include <QGraphicsTextItem>
/* qt4.4 !! */
 
 
class Xedit : public QTextBrowser
{
     Q_OBJECT
//
public:	
    Xedit::Xedit( QWidget* parent = 0 )
 : QTextBrowser(parent)
{
    setAcceptDrops(true);
}
void dragEnterEvent(QDragEnterEvent *event)
{
    qDebug() << "### dragEnterEvent ";
    /////event->acceptProposedAction();
    insertFromMimeData(event->mimeData());
} 
void insertFromMimeData ( const QMimeData * source )
{
    /* external  paste drag  */
    qDebug() << "### insertFromMimeData ";
    if ( source->formats().contains("text/html") ) {
         QString draghtml = source->html();
         QTextDocumentFragment fragment = QTextDocumentFragment::fromHtml(draghtml);
         textCursor().insertFragment(fragment);
         return;
    }
    if ( source->hasText() )  {
        textCursor().insertText(source->text());
        return;
    }
}
 
};
 
int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
 
    a.setOrganizationName("Dummy");
    a.setOrganizationDomain("dummy.com");
    a.setApplicationName("TestEventforward");
    /////Xedit *extendededit = new Xedit;
    ///////extendededit->show();
    QGraphicsScene scene;
    QGraphicsView view(&scene);
    view.show();
    QWidget *editor = new QWidget;
    QGridLayout *grid = new QGridLayout(editor);
    Xedit *extendededit = new Xedit;
    extendededit->setReadOnly(false);
    extendededit->setOpenExternalLinks(false);
    grid->addWidget(extendededit, 0, 0, 1, 1);
    QGraphicsProxyWidget *proxy = scene.addWidget(editor);
    /* http://doc.trolltech.com/main-snapshot/qgraphicsproxywidget.html */
    proxy->setAcceptDrops( true );
    ////proxy->setAttribute( Qt::WA_AcceptDrops , true );
    QGraphicsTextItem *text = scene.addText("Helo world..!"); 
    text->setZValue(1.2);    
    extendededit->setDocument(text->document());
 
    proxy->show();
    proxy->setZValue(1.5);
    a.connect( &a, SIGNAL( lastWindowClosed() ), &a, SLOT( quit() ) );
    return a.exec();
}
 
#include "main.moc"

#include <QGraphicsScene>
#include <QtGui>
#include <QGraphicsProxyWidget>
#include <QGraphicsTextItem>
/* qt4.4 !! */


class Xedit : public QTextBrowser
{
     Q_OBJECT
//
public:	
    Xedit::Xedit( QWidget* parent = 0 )
 : QTextBrowser(parent)
{
    setAcceptDrops(true);
}
void dragEnterEvent(QDragEnterEvent *event)
{
    qDebug() << "### dragEnterEvent ";
    /////event->acceptProposedAction();
    insertFromMimeData(event->mimeData());
} 
void insertFromMimeData ( const QMimeData * source )
{
    /* external  paste drag  */
    qDebug() << "### insertFromMimeData ";
    if ( source->formats().contains("text/html") ) {
         QString draghtml = source->html();
         QTextDocumentFragment fragment = QTextDocumentFragment::fromHtml(draghtml);
         textCursor().insertFragment(fragment);
         return;
    }
    if ( source->hasText() )  {
        textCursor().insertText(source->text());
        return;
    }
}

};

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    
    a.setOrganizationName("Dummy");
    a.setOrganizationDomain("dummy.com");
    a.setApplicationName("TestEventforward");
    /////Xedit *extendededit = new Xedit;
    ///////extendededit->show();
    QGraphicsScene scene;
    QGraphicsView view(&scene);
    view.show();
    QWidget *editor = new QWidget;
    QGridLayout *grid = new QGridLayout(editor);
    Xedit *extendededit = new Xedit;
    extendededit->setReadOnly(false);
    extendededit->setOpenExternalLinks(false);
    grid->addWidget(extendededit, 0, 0, 1, 1);
    QGraphicsProxyWidget *proxy = scene.addWidget(editor);
    /* http://doc.trolltech.com/main-snapshot/qgraphicsproxywidget.html */
    proxy->setAcceptDrops( true );
    ////proxy->setAttribute( Qt::WA_AcceptDrops , true );
    QGraphicsTextItem *text = scene.addText("Helo world..!"); 
    text->setZValue(1.2);    
    extendededit->setDocument(text->document());
    
    proxy->show();
    proxy->setZValue(1.5);
    a.connect( &a, SIGNAL( lastWindowClosed() ), &a, SLOT( quit() ) );
    return a.exec();
}

#include "main.moc"

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[wysota]

What do you mean "forward drag and drop"? Does the view accept drops?

[patrik08]

What do you mean "forward drag and drop"? Does the view accept drops?

if i run only class Xedit : public QTextBrowser drag and drop work
on QGraphicsProxyWidget inside QGraphicsScene i can edit and display correct,
but not Drag inside text image or other ....
the problem is only on drag and drop event... not comming in .

[patrik08]

What do you mean "forward drag and drop"? Does the view accept drops?

i not think that QGraphicsView must send all drag and drop event to his subitem?
but it works ...
i hope to not forward keyPressEvent and all other ...

void XhtmlView::dragEnterEvent ( QDragEnterEvent * e )
{
	/* DivDiagram *CurrentActive; only xhtml <div>  tag */
	if (CurrentActive->id() > 0 && CurrentActive->ProxyBridgeEdit->isVisible()) {
		CurrentActive->AdvanceEdit->wtxt->insertFromMimeData(e->mimeData());
		return;
	}
}

void XhtmlView::dragEnterEvent ( QDragEnterEvent * e )
{
	/* DivDiagram *CurrentActive; only xhtml <div>  tag */
	if (CurrentActive->id() > 0 && CurrentActive->ProxyBridgeEdit->isVisible()) {
		CurrentActive->AdvanceEdit->wtxt->insertFromMimeData(e->mimeData());
		return;
	}
}

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[wysota]

But did you enable drops for the view?

[patrik08]

But did you enable drops for the view?

Yes ... but i like only drag drop on subitem QGraphicsProxyWidget an his QWidget
the doc say : QGraphicsProxyWidget imo forum QTCLASS 4.4beta not found http://doc.trolltech.com/main-snapsh...oxywidget.html

The QGraphicsProxyWidget class provides a proxy layer for embedding a QWidget in a QGraphicsScene.
QGraphicsProxyWidget embeds any QWidget-based widget, for example, a QPushButton, QFontComboBox, or even QFileDialog, into QGraphicsScene. It forwards events between the two objects and translates between QWidget's integer-based geometry and QGraphicsWidget's qreal-based geometry. QGraphicsProxyWidget supports all core features of QWidget, including tab focus, keyboard input, Drag & Drop, and popups. You can also embed complex widgets, e.g., widgets with subwidgets.
QGraphicsProxyWidget takes care of automatically embedding popup children of embedded widgets through creating a child proxy for each popup. This means that when an embedded QComboBox shows its popup list, a new QGraphicsProxyWidget is created automatically, embedding the popup, and positioning it correctly.

I wand to build only a xhtml editor that processing div tag floating absolute and display it block or not...

[wysota]

It could be D&D related event passing through the proxy has not yet been implemented. We are talking about beta software here.

[patrik08]

It could be D&D related event passing through the proxy has not yet been implemented. We are talking about beta software here.

you know another way to display inside QGraphicsView / QGraphicsTextItem an exdended
xhtml editor? not beta?

[wysota]

Implement a custom QGraphicsItem.

[patrik08]

Implement a custom QGraphicsItem.

Now is running i drag drop from QGraphicsView and send to QGraphicsTextItem proxie..
to insert image or so..
And QGraphicsTextItem become 33 line to handle text from parent QAction on a simple way..

void DivDiagram::TextHandler()
{
    QColor col;
    QAction *invoice = qobject_cast<QAction *>(sender());
    const double cases = invoice->data().toDouble();
    QTextCursor c = QGraphicsTextItem::textCursor();
    QTextCharFormat format = c.charFormat();
    QFont f = format.font();
    if (cases == 0.01) {
    f.setBold(true); 
    } else if (cases == 0.02) {
    f.setItalic(true); 
    } else if (cases == 0.03) {
    f.setOverline(true); 
    } else if (cases == 0.04) {
    f.setUnderline(true); 
    } else if (cases == 0.05) {
    f.setStrikeOut(true); 
    } else if (cases == 0.06) {
        col = QColorDialog::getRgba();
        if (!col.isValid()) {
        return;
        }
    format.setForeground(QBrush(col));
    } else if (cases == 0.07) {
        col = QColorDialog::getRgba();
        if (!col.isValid()) {
        return;
        }
    format.setBackground(QBrush(col));
    } else if (cases > 3) {
    f.setPointSizeF(cases); 
    } else {
    return;
    }
    format.setFont(f);
    c.setCharFormat(format);
}

void DivDiagram::TextHandler()
{
    QColor col;
    QAction *invoice = qobject_cast<QAction *>(sender());
    const double cases = invoice->data().toDouble();
    QTextCursor c = QGraphicsTextItem::textCursor();
    QTextCharFormat format = c.charFormat();
    QFont f = format.font();
    if (cases == 0.01) {
    f.setBold(true); 
    } else if (cases == 0.02) {
    f.setItalic(true); 
    } else if (cases == 0.03) {
    f.setOverline(true); 
    } else if (cases == 0.04) {
    f.setUnderline(true); 
    } else if (cases == 0.05) {
    f.setStrikeOut(true); 
    } else if (cases == 0.06) {
        col = QColorDialog::getRgba();
        if (!col.isValid()) {
        return;
        }
    format.setForeground(QBrush(col));
    } else if (cases == 0.07) {
        col = QColorDialog::getRgba();
        if (!col.isValid()) {
        return;
        }
    format.setBackground(QBrush(col));
    } else if (cases > 3) {
    f.setPointSizeF(cases); 
    } else {
    return;
    }
    format.setFont(f);
    c.setCharFormat(format);
}

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