File indexing completed on 2024-12-01 06:33:18

 /*
     KmPlot - a math. function plotter for the KDE-Desktop
 
     SPDX-FileCopyrightText: 2006 David Saxton <david@bluehaze.org>
 
     This file is part of the KDE Project.
     KmPlot is part of the KDE-EDU Project.
 
     SPDX-License-Identifier: GPL-2.0-or-later
 
 */
 
 #include "equationeditwidget.h"
 
 #include <QFocusEvent>
 #include <QKeyEvent>
 #include <QStyle>
 #include <QStyleOptionFrame>
 #include <QWheelEvent>
 
 #include "equationedit.h"
 
 void EquationEditWidget::setClearSelectionOnFocusOut(bool doIt)
 {
     m_clearSelectionOnFocusOut = doIt;
 }
 
 EquationEditWidget::EquationEditWidget(EquationEdit *parent)
     : KTextEdit(parent)
 {
     m_clearSelectionOnFocusOut = true;
     m_parent = parent;
     recalculateGeometry();
 }
 
 void EquationEditWidget::recalculateGeometry()
 {
     // Set fixed height
     ensurePolished();
     QFontMetrics fm(document()->defaultFont());
     int h = qMax(fm.lineSpacing(), 14) + 6;
     int m = style()->pixelMetric(QStyle::PM_DefaultFrameWidth);
     QStyleOptionFrame opt;
     opt.rect = rect();
     opt.palette = palette();
     opt.state = QStyle::State_None;
     setFixedHeight(h + (2 * m));
 
     setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed);
     setContentsMargins(0, 0, 0, 0);
     setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
     setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
     setWordWrapMode(QTextOption::NoWrap);
     setLineWrapMode(KTextEdit::NoWrap);
     setTabChangesFocus(true);
 }
 
 void EquationEditWidget::wheelEvent(QWheelEvent *e)
 {
     e->accept();
 }
 
 void EquationEditWidget::keyPressEvent(QKeyEvent *e)
 {
     if ((e->key() == Qt::Key_Return) || (e->key() == Qt::Key_Enter)) {
         e->accept();
         emit m_parent->editingFinished();
         emit m_parent->returnPressed();
     } else {
         // Still pass these keys to KTextEdit, in case the user has to scroll
         // up/down the text
         if (e->key() == Qt::Key_Up)
             emit m_parent->upPressed();
         else if (e->key() == Qt::Key_Down)
             emit m_parent->downPressed();
 
         KTextEdit::keyPressEvent(e);
     }
 }
 
 void EquationEditWidget::focusOutEvent(QFocusEvent *e)
 {
     KTextEdit::focusOutEvent(e);
 
     if (m_clearSelectionOnFocusOut)
         clearSelection();
     m_parent->reHighlight();
 
     emit m_parent->editingFinished();
 }
 
 void EquationEditWidget::focusInEvent(QFocusEvent *e)
 {
     KTextEdit::focusOutEvent(e);
 
     m_parent->reHighlight();
     if (e->reason() == Qt::TabFocusReason)
         selectAll();
 }
 
 void EquationEditWidget::clearSelection()
 {
     QTextCursor cursor = textCursor();
     if (!cursor.hasSelection())
         return;
 
     cursor.clearSelection();
     setTextCursor(cursor);
 }