[Interest] resizable QTextEdit

[Igor Mironchik]

Hi,


#include <QTextEdit>
#include <QHBoxLayout>
#include <QLabel>
#include <QWidget>
#include <QApplication>
#include <QPainter>
#include <QVBoxLayout>
#include <QMouseEvent>
#include <QResizeEvent>
#include <QFrame>


class Resizable {
public:
     Resizable()
     {
     }

     virtual ~Resizable()
     {
     }

     virtual void addSize( const QSize & size ) = 0;

protected:
     QSize m_size;
};

class Corner
     :    public QWidget
{
public:
     Corner( Resizable * resizable, QWidget * parent )
         :    QWidget( parent )
         ,    m_toResize( resizable )
         ,    m_pressed( false )
     {
         resize( sizeHint() );
     }

     virtual ~Corner()
     {
     }

     QSize sizeHint() const Q_DECL_OVERRIDE
     {
         return QSize( 10, 10 );
     }

protected:
     void paintEvent( QPaintEvent * ) Q_DECL_OVERRIDE
     {
         QPainter p( this );
         p.setPen( Qt::red );
         p.setBrush( Qt::red );

         p.drawRect( rect() );
     }

     void mousePressEvent( QMouseEvent * e ) Q_DECL_OVERRIDE
     {
         if( e->button() == Qt::LeftButton )
         {
             m_pos = e->pos();
             m_pressed = true;
         }

         e->accept();
     }

     void mouseReleaseEvent( QMouseEvent * e ) Q_DECL_OVERRIDE
     {
         if( e->button() == Qt::LeftButton )
             m_pressed = false;

         e->accept();
     }

     void mouseMoveEvent( QMouseEvent * e ) Q_DECL_OVERRIDE
     {
         if( m_pressed )
         {
             const QPoint delta = e->pos() - m_pos;

             m_toResize->addSize( QSize( delta.x(), delta.y() ) );
         }

         e->accept();
     }

private:
     Resizable * m_toResize;
     QPoint m_pos;
     bool m_pressed;
};

class Text
     :    public QTextEdit
     ,    public Resizable
{
public:
     Text( QWidget * parent )
         :    QTextEdit( parent )
         ,    m_corner( new Corner( this, this ) )
         ,    m_size( QTextEdit::sizeHint() )
     {
         m_corner->move( width() - m_corner->width(),
             height() - m_corner->height() );
     }

     virtual ~Text()
     {
     }

     void addSize( const QSize & size ) Q_DECL_OVERRIDE
     {
         setSizePolicy( QSizePolicy::Fixed, QSizePolicy::Fixed );

         m_size += size;

         updateGeometry();
     }

     QSize sizeHint() const Q_DECL_OVERRIDE
     {
         return m_size;
     }

protected:
     void resizeEvent( QResizeEvent * e ) Q_DECL_OVERRIDE
     {
         QTextEdit::resizeEvent( e );

         m_corner->move( e->size().width() - m_corner->width(),
             e->size().height() - m_corner->height() );

         m_size = e->size();

         e->accept();
     }

private:
     Corner * m_corner;
     QSize m_size;
};


class Form
     :    public QWidget
{
public:
     Form()
     {
         QVBoxLayout * v = new QVBoxLayout( this );
         QFrame * f = new QFrame( this );
         f->setFrameStyle( QFrame::Panel | QFrame::Sunken );
         QHBoxLayout * h = new QHBoxLayout( f );
         v->addWidget( f );
         QLabel * label = new QLabel( "Resizable Text Field", f );
         label->setSizePolicy( QSizePolicy::Fixed, QSizePolicy::Fixed );
         h->addWidget( label );
         Text * text = new Text( f );
         h->addWidget( text );
         QSpacerItem * s = new QSpacerItem( 10, 10, QSizePolicy::Fixed,
             QSizePolicy::Expanding );
         v->addItem( s );

         resize( 800, 800 );
     }

     virtual ~Form()
     {
     }
};

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

     Form f;
     f.show();

     return app.exec();
}


On 15.04.2018 19:30, Alexander Semke wrote:
> Hi Igor,
>
>> As a possible solution:
>> [...]
> Works now.  I pushed a modified version of your code to our repository in
> https://cgit.kde.org/labplot.git/commit/?
> id=1cacf9f095b5e850baa58584b071986fbfe790fb
>
>
> The only problem now is that the entered text is not shown in TextEdit with
> this new class. The text changes are accepted, but nothing is shown. Any idea
> here?
>
>
> Regards,
> Alexander
>
>
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