Hi again,
If you want to be able to shrink the width too, you can do something
similar to:
#include <QTextEdit>
#include <QHBoxLayout>
#include <QLabel>
#include <QWidget>
#include <QApplication>
#include <QPainter>
#include <QVBoxLayout>
#include <QMouseEvent>
#include <QResizeEvent>
#include <QFrame>
class Text;
class Corner
: public QWidget
{
public:
Corner( Text * parent );
virtual ~Corner();
QSize sizeHint() const Q_DECL_OVERRIDE;
protected:
void paintEvent( QPaintEvent * ) Q_DECL_OVERRIDE;
void mousePressEvent( QMouseEvent * e ) Q_DECL_OVERRIDE;
void mouseReleaseEvent( QMouseEvent * e ) Q_DECL_OVERRIDE;
void mouseMoveEvent( QMouseEvent * e ) Q_DECL_OVERRIDE;
private:
Text * m_toResize;
QPoint m_pos;
bool m_pressed;
};
class Text
: public QTextEdit
{
public:
Text( QWidget * parent, QLayout * layout );
virtual ~Text();
void addSize( const QSize & size );
QSize sizeHint() const Q_DECL_OVERRIDE;
protected:
void resizeEvent( QResizeEvent * e ) Q_DECL_OVERRIDE;
private:
Corner * m_corner;
QSize m_size;
QLayout * m_layout;
};
Corner::Corner( Text * parent )
: QWidget( parent )
, m_toResize( parent )
, m_pressed( false )
{
}
Corner::~Corner()
{
}
QSize
Corner::sizeHint() const
{
return QSize( 10, 10 );
}
void
Corner::paintEvent( QPaintEvent * )
{
QPainter p( this );
p.setPen( Qt::red );
p.setBrush( Qt::red );
p.drawRect( rect() );
}
void
Corner::mousePressEvent( QMouseEvent * e )
{
if( e->button() == Qt::LeftButton )
{
m_pos = e->pos();
m_pressed = true;
}
e->accept();
}
void
Corner::mouseReleaseEvent( QMouseEvent * e )
{
if( e->button() == Qt::LeftButton )
m_pressed = false;
e->accept();
}
void
Corner::mouseMoveEvent( QMouseEvent * e )
{
if( m_pressed )
{
const QPoint delta = e->pos() - m_pos;
m_toResize->addSize( QSize( delta.x(), delta.y() ) );
}
e->accept();
}
Text::Text( QWidget * parent, QLayout * layout )
: QTextEdit( parent )
, m_corner( new Corner( this ) )
, m_size( QTextEdit::sizeHint() )
, m_layout( layout )
{
m_corner->move( width() - m_corner->width(),
height() - m_corner->height() );
}
Text::~Text()
{
}
void
Text::addSize( const QSize & size )
{
setSizePolicy( QSizePolicy::Fixed, QSizePolicy::Fixed );
m_size = QSize( m_size.width() + size.width(), m_size.height() +
size.height() );
updateGeometry();
}
QSize
Text::sizeHint() const
{
return m_size;
}
void
Text::resizeEvent( QResizeEvent * e )
{
m_corner->move( e->size().width() - m_corner->width(),
e->size().height() - m_corner->height() );
m_size = e->size();
e->accept();
}
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( "Resizeable Text Field", f );
label->setSizePolicy( QSizePolicy::Fixed, QSizePolicy::Fixed );
h->addWidget( label );
Text * text = new Text( f, v );
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 11:53, Alexander Semke wrote:
On Freitag, 13. April 2018 10:22:14 CEST Igor Mironchik wrote:
Something like this?
[...]
Thanks Igor, I've got the idea. The resize works fine now but I have the
problem with the layout of the parent widget being not updated. My text edit
widget is embedded into a QFrame with a vertical layout. After the manual
resize I need the layout(s) and the sizes/positions of this frame and of all
the other widgets frame's parent to be adjusted to the new size of the text
edit.
https://imgur.com/a/eV2Fj - here the height of the text edit widget was made
smaller but the QFrame widget where the text edit is placed in a vertical
layout was not resized. I'm calling frame->layout()->activate() to trigger the
recalculation but this doesn't lead to the desired effect... Do I new to
resize the frame widget here manually or are there any other methods to
update/recalculate the layout?
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