File indexing completed on 2024-05-12 15:28:20

 /***************************************************************************
     File                 : ResizableTextEdit.cpp
     Project              : LabPlot
     Description          : Extended TextEdit to allow the manual resize by the user
     --------------------------------------------------------------------
     Copyright            : (C) 2018 Alexander Semke (alexander.semke@web.de)
 
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *  This program is free software; you can redistribute it and/or modify   *
  *  it under the terms of the GNU General Public License as published by   *
  *  the Free Software Foundation; either version 2 of the License, or      *
  *  (at your option) any later version.                                    *
  *                                                                         *
  *  This program is distributed in the hope that it will be useful,        *
  *  but WITHOUT ANY WARRANTY; without even the implied warranty of         *
  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the          *
  *  GNU General Public License for more details.                           *
  *                                                                         *
  *   You should have received a copy of the GNU General Public License     *
  *   along with this program; if not, write to the Free Software           *
  *   Foundation, Inc., 51 Franklin Street, Fifth Floor,                    *
  *   Boston, MA  02110-1301  USA                                           *
  *                                                                         *
  ***************************************************************************/
 #include "ResizableTextEdit.h"
 
 #include <QApplication>
 #include <QMouseEvent>
 #include <QPainter>
 
 GrabBar::GrabBar(ResizableTextEdit* parent, bool vertResizeOnly) : QWidget(parent),
     m_parent(parent), m_vertResizeOnly(vertResizeOnly) {
 
     resize(20,10);
 }
 
 QSize GrabBar::sizeHint() const {
     return QSize{20, 10};
 }
 
 void GrabBar::paintEvent(QPaintEvent*) {
     QPainter p(this);
     p.setBrush(QApplication::palette().color(QPalette::AlternateBase));
     p.drawRect(rect());
 }
 
 void GrabBar::mousePressEvent(QMouseEvent* e) {
     if (e->button() == Qt::LeftButton) {
         m_pos = e->pos();
         m_pressed = true;
     }
 
     e->accept();
 }
 
 void GrabBar::mouseReleaseEvent(QMouseEvent* e) {
     if (e->button() == Qt::LeftButton)
         m_pressed = false;
 
     e->accept();
 }
 
 void GrabBar::mouseMoveEvent(QMouseEvent* e) {
     if (m_pressed) {
         const QPoint delta = e->pos() - m_pos;
         if (m_vertResizeOnly)
             m_parent->addSize( QSize( 0, delta.y() ) );
         else
             m_parent->addSize( QSize( delta.x(), delta.y() ) );
     }
 
     e->accept();
 }
 
 void GrabBar::enterEvent(QEvent* e) {
     if (m_vertResizeOnly)
         QApplication::setOverrideCursor(QCursor(Qt::SizeVerCursor));
     else
         QApplication::setOverrideCursor(QCursor(Qt::SizeFDiagCursor));
 
     e->accept();
 }
 
 void GrabBar::leaveEvent(QEvent* e) {
     QApplication::restoreOverrideCursor();
     e->accept();
 }
 
 /**
  * \class ResizableTextEdit
  * \brief Extended QTextEdit supporting the manual resize by the user.
  *
  * \ingroup frontend/widgets
  */
 ResizableTextEdit::ResizableTextEdit(QWidget* parent, bool vertResizeOnly) : QTextEdit(parent),
     m_grabBar(new GrabBar(this, vertResizeOnly)),
     m_size( QTextEdit::sizeHint() ),
     m_vertResizeOnly(vertResizeOnly) {
 
 }
 
 void ResizableTextEdit::addSize(QSize size) {
     m_size = QSize(m_size.width(), m_size.height() + size.height());
     updateGeometry();
 }
 
 QSize ResizableTextEdit::sizeHint() const {
     return m_size;
 }
 
 void ResizableTextEdit::resizeEvent(QResizeEvent* e) {
     if (m_vertResizeOnly)
         m_grabBar->move(width()/2 - m_grabBar->width()/2, height() - m_grabBar->height());
     else
         m_grabBar->move(width() - m_grabBar->width(), height() - m_grabBar->height());
 
     m_size = e->size();
 
     QTextEdit::resizeEvent(e);
 
     e->accept();
 }