Accessing generated pixmaps in html / Custom tooltips

[wagmare]

or u can show ur tool tip at particular instance as

QPoint value (x , y );
QString test = "String";
QToolTip::setPalette(color);
QToolTip::setFont(serifFont);
QToolTip::showText(value2, test);

QPoint value (x , y );
QString test = "String";
QToolTip::setPalette(color);
QToolTip::setFont(serifFont);
QToolTip::showText(value2, test);

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and can hide it using
QToolTip::hideText();

[nish]

or u can show ur tool tip at particular instance as

QPoint value (x , y );
QString test = "String";
QToolTip::setPalette(color);
QToolTip::setFont(serifFont);
QToolTip::showText(value2, test);

QPoint value (x , y );
QString test = "String";
QToolTip::setPalette(color);
QToolTip::setFont(serifFont);
QToolTip::showText(value2, test);

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and can hide it using
QToolTip::hideText();

he do not want this. thats simple tooltip..

[numbat]

You can do this by subclassing QAbstractFileEngine. A bare-bones implementation (though probably enough) follows:

Header:

#ifndef MAINWINDOW_H
#define MAINWINDOW_H
 
#include <QtGui/QMainWindow>
#include <QAbstractFileEngineHandler>
#include <QAbstractFileEngine>
#include <QDateTime>
#include <QByteArray>
#include <QtAlgorithms>
 
class MainWindow : public QMainWindow
{
    Q_OBJECT
 
public:
    MainWindow(QWidget *parent = 0);
    ~MainWindow();
};
 
class NumbatEngineHandler : public QAbstractFileEngineHandler
{
public:
    QAbstractFileEngine *create(const QString &fileName) const;
};
 
class NumbatEngine : public QAbstractFileEngine
{
public:
    NumbatEngine(const QString& fileName);
    bool caseSensitive () const { return false; }
    bool close ()  { return true; }
    QStringList entryList ( QDir::Filters filters, const QStringList & filterNames ) const { return QStringList(); }
    FileFlags fileFlags ( FileFlags type = FileInfoAll ) const
    { return QAbstractFileEngine::ReadOtherPerm | QAbstractFileEngine::ExeOtherPerm | QAbstractFileEngine::FileType | QAbstractFileEngine::WriteOtherPerm; }
    QString fileName ( FileName file = DefaultName ) const { return m_fileName; }
    QDateTime fileTime ( FileTime time ) const { return QDateTime(); }
    bool mkdir ( const QString & dirName, bool createParentDirectories ) const { return false; }
    QString owner ( FileOwner owner ) const { return QString(); }
    uint ownerId ( FileOwner owner ) const {  return -2; }
    bool remove () { return false; }
    bool rename ( const QString & newName ) { return false; }
    bool rmdir ( const QString & dirName, bool recurseParentDirectories ) const { return false; }
    void setFileName ( const QString & file ) { m_fileName = file; }
    bool setPermissions ( uint perms ) { return false; }
    bool setSize ( qint64 size ) { m_bytes->resize(size); return true; }
    qint64 size () const { return m_bytes->size(); }
    bool seek ( qint64 offset ) { m_filePos = offset; return true; }
    bool open ( QIODevice::OpenMode mode ) { return true; }
    bool isRelativePath () const { return false; }
    qint64 write ( const char * data, qint64 len );
    qint64 read ( char * data, qint64 maxlen );
 
private:
    QByteArray* m_bytes;
    QString m_fileName;
    qint64 m_filePos;
};
 
 
#endif // MAINWINDOW_H

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QtGui/QMainWindow>
#include <QAbstractFileEngineHandler>
#include <QAbstractFileEngine>
#include <QDateTime>
#include <QByteArray>
#include <QtAlgorithms>

class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    MainWindow(QWidget *parent = 0);
    ~MainWindow();
};

class NumbatEngineHandler : public QAbstractFileEngineHandler
{
public:
    QAbstractFileEngine *create(const QString &fileName) const;
};

class NumbatEngine : public QAbstractFileEngine
{
public:
    NumbatEngine(const QString& fileName);
    bool caseSensitive () const { return false; }
    bool close ()  { return true; }
    QStringList entryList ( QDir::Filters filters, const QStringList & filterNames ) const { return QStringList(); }
    FileFlags fileFlags ( FileFlags type = FileInfoAll ) const
    { return QAbstractFileEngine::ReadOtherPerm | QAbstractFileEngine::ExeOtherPerm | QAbstractFileEngine::FileType | QAbstractFileEngine::WriteOtherPerm; }
    QString fileName ( FileName file = DefaultName ) const { return m_fileName; }
    QDateTime fileTime ( FileTime time ) const { return QDateTime(); }
    bool mkdir ( const QString & dirName, bool createParentDirectories ) const { return false; }
    QString owner ( FileOwner owner ) const { return QString(); }
    uint ownerId ( FileOwner owner ) const {  return -2; }
    bool remove () { return false; }
    bool rename ( const QString & newName ) { return false; }
    bool rmdir ( const QString & dirName, bool recurseParentDirectories ) const { return false; }
    void setFileName ( const QString & file ) { m_fileName = file; }
    bool setPermissions ( uint perms ) { return false; }
    bool setSize ( qint64 size ) { m_bytes->resize(size); return true; }
    qint64 size () const { return m_bytes->size(); }
    bool seek ( qint64 offset ) { m_filePos = offset; return true; }
    bool open ( QIODevice::OpenMode mode ) { return true; }
    bool isRelativePath () const { return false; }
    qint64 write ( const char * data, qint64 len );
    qint64 read ( char * data, qint64 maxlen );

private:
    QByteArray* m_bytes;
    QString m_fileName;
    qint64 m_filePos;
};


#endif // MAINWINDOW_H

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CPP File:

#include "mainwindow.h"
#include <QMap>
#include <QPixmap>
#include <QLabel>
#include <QApplication>
 
QAbstractFileEngine * NumbatEngineHandler::create(const QString &fileName) const
{
    // We handle all files which start with ???
    if (fileName.toLower().startsWith("???"))
           return new NumbatEngine(fileName);
    else
        return 0;
}
 
 
NumbatEngine::NumbatEngine(const QString& fileName)
            : QAbstractFileEngine(), m_fileName(fileName), m_filePos(0)
 
{
    static QMap<QString, QByteArray*> map;
 
    if (map.contains(m_fileName))
    {
        m_bytes = map.value(m_fileName);
    }
    else
    {
        m_bytes = new QByteArray;
        map[m_fileName] = m_bytes;
    }
}
 
qint64 NumbatEngine::write ( const char * data, qint64 len )
{
    if (m_filePos + len > m_bytes->size()) m_bytes->resize(m_filePos + len);
 
    qCopy(data, data + len, m_bytes->data() + m_filePos);
 
    m_filePos += len;
 
    return len;
}
 
qint64 NumbatEngine::read ( char * data, qint64 maxlen )
{
    qint64 readBytes;
 
    if (m_filePos + maxlen > m_bytes->size())
        readBytes = m_bytes->size() - m_filePos;
    else
        readBytes = maxlen;
 
    qCopy(m_bytes->constData() + m_filePos,
          m_bytes->constData() + m_filePos + readBytes, data);
 
    m_filePos += readBytes;
 
    return readBytes;
}
 
 
 
/* Demonstration. */
MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
{
    QPixmap pix("img.png");
    pix.save("???Hello.png");
 
 
    QLabel * lbl = new QLabel;
    lbl->setText("<b> this is a test</b><img src=\"???Hello.png\" />");
 
    setCentralWidget(lbl);
}
 
 
MainWindow::~MainWindow()
{
}
 
 int main(int argc, char **argv)
 {
     QApplication app(argc, argv);
 
     NumbatEngineHandler engine;
 
     MainWindow window;
     window.show();
 
     return app.exec();
 }

#include "mainwindow.h"
#include <QMap>
#include <QPixmap>
#include <QLabel>
#include <QApplication>

QAbstractFileEngine * NumbatEngineHandler::create(const QString &fileName) const
{
    // We handle all files which start with ???
    if (fileName.toLower().startsWith("???"))
           return new NumbatEngine(fileName);
    else
        return 0;
}


NumbatEngine::NumbatEngine(const QString& fileName)
            : QAbstractFileEngine(), m_fileName(fileName), m_filePos(0)

{
    static QMap<QString, QByteArray*> map;

    if (map.contains(m_fileName))
    {
        m_bytes = map.value(m_fileName);
    }
    else
    {
        m_bytes = new QByteArray;
        map[m_fileName] = m_bytes;
    }
}

qint64 NumbatEngine::write ( const char * data, qint64 len )
{
    if (m_filePos + len > m_bytes->size()) m_bytes->resize(m_filePos + len);

    qCopy(data, data + len, m_bytes->data() + m_filePos);

    m_filePos += len;

    return len;
}

qint64 NumbatEngine::read ( char * data, qint64 maxlen )
{
    qint64 readBytes;

    if (m_filePos + maxlen > m_bytes->size())
        readBytes = m_bytes->size() - m_filePos;
    else
        readBytes = maxlen;

    qCopy(m_bytes->constData() + m_filePos,
          m_bytes->constData() + m_filePos + readBytes, data);

    m_filePos += readBytes;

    return readBytes;
}



/* Demonstration. */
MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
{
    QPixmap pix("img.png");
    pix.save("???Hello.png");


    QLabel * lbl = new QLabel;
    lbl->setText("<b> this is a test</b><img src=\"???Hello.png\" />");

    setCentralWidget(lbl);
}


MainWindow::~MainWindow()
{
}

 int main(int argc, char **argv)
 {
     QApplication app(argc, argv);

     NumbatEngineHandler engine;

     MainWindow window;
     window.show();

     return app.exec();
 }

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