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/*
SPDX-FileCopyrightText: 2023 Gabriel Barrantes <gabriel.barrantes.dev@outlook.com>
SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "kcalc_input_display.h"
#include <QKeyEvent>
#include <QLineEdit>
//------------------------------------------------------------------------------
// Name: KCalcInputDisplay
// Desc: constructor
//------------------------------------------------------------------------------
KCalcInputDisplay::KCalcInputDisplay(QWidget *parent)
: QLineEdit(parent)
{
overwrite_ = false;
hard_overwrite_ = false;
has_result_ = false;
}
//------------------------------------------------------------------------------
// Name: ~KCalcInputDisplay
// Desc:
//------------------------------------------------------------------------------
KCalcInputDisplay::~KCalcInputDisplay() = default;
//------------------------------------------------------------------------------
// Name: reset
// Desc:
//------------------------------------------------------------------------------
void KCalcInputDisplay::reset(bool clearRedoUndo /*=false*/)
{
this->clear();
overwrite_ = false;
hard_overwrite_ = false;
has_result_ = false;
if (clearRedoUndo) {
this->setText(QStringLiteral(""));
}
}
//------------------------------------------------------------------------------
// Name: insertToken
// Desc:
//------------------------------------------------------------------------------
void KCalcInputDisplay::insertToken(const QString &token)
{
if (overwrite_ || hard_overwrite_) {
this->clear();
overwrite_ = false;
hard_overwrite_ = false;
}
this->insert(token);
has_result_ = false;
}
//------------------------------------------------------------------------------
// Name: insertTokenNumeric
// Desc:
//------------------------------------------------------------------------------
void KCalcInputDisplay::insertTokenNumeric(const QString &token)
{
if (overwrite_ || hard_overwrite_ || has_result_) {
this->clear();
overwrite_ = false;
hard_overwrite_ = false;
has_result_ = false;
}
this->insert(token);
}
//------------------------------------------------------------------------------
// Name: insertTokenFunction
// Desc:
//------------------------------------------------------------------------------
void KCalcInputDisplay::insertTokenFunction(const QString &token)
{
if (overwrite_ || hard_overwrite_) {
overwrite_ = false;
hard_overwrite_ = false;
this->clear();
this->insert(token);
this->insert(QStringLiteral("("));
} else if (has_result_) {
this->home(false);
this->insert(token);
this->insert(QStringLiteral("("));
this->end(false);
this->insert(QStringLiteral(")"));
} else {
this->insert(token);
this->insert(QStringLiteral("("));
}
}
//------------------------------------------------------------------------------
// Name: setHasResult
// Desc:
//------------------------------------------------------------------------------
void KCalcInputDisplay::setHasResult()
{
has_result_ = true;
this->clearFocus();
}
//------------------------------------------------------------------------------
// Name: slotSetOverwrite
// Desc: when set, inserting to the display will clear it, and then insert.
// (It can be reset refocusing the display)
//------------------------------------------------------------------------------
void KCalcInputDisplay::slotSetOverwrite()
{
overwrite_ = true;
this->clearFocus();
// this->focusNextChild(); /* workaround to defocus the QWidget,
// although it works, it can lead to
// issues if the GUI changes */
}
//------------------------------------------------------------------------------
// Name: slotSetHardOverwrite
// Desc: when set, focusing or inserting to the display will clear it,
// and then insert (if requested),
//------------------------------------------------------------------------------
void KCalcInputDisplay::slotSetHardOverwrite()
{
hard_overwrite_ = true;
overwrite_ = true;
this->focusNextChild(); /* workaround to defocus the QWidget,
although it works, it can lead to
issues if the GUI changes */
}
//------------------------------------------------------------------------------
// Name: clearHasResult
// Desc:
//------------------------------------------------------------------------------
void KCalcInputDisplay::clearHasResult()
{
has_result_ = false;
}
//------------------------------------------------------------------------------
// Name: slotClearOverwrite
// Desc: resets Overwrite/hardOverwrite flags,
// deletes finishing '=' when required
//------------------------------------------------------------------------------
void KCalcInputDisplay::slotClearOverwrite()
{
overwrite_ = false;
int tmp_cursorPosition = this->cursorPosition();
if (this->text().endsWith(QLatin1String("="))) {
this->end(false);
this->backspace();
}
this->setCursorPosition(tmp_cursorPosition);
if (hard_overwrite_) {
hard_overwrite_ = false;
this->clear();
}
}
//------------------------------------------------------------------------------
// Name: keyPressEvent
// Desc:
//------------------------------------------------------------------------------
void KCalcInputDisplay::keyPressEvent(QKeyEvent *event)
{
if (event->matches(QKeySequence::Undo)) {
undoCalculation();
} else if (event->matches(QKeySequence::Redo)) {
redoCalculation();
} else {
QLineEdit::keyPressEvent(event);
}
}
//------------------------------------------------------------------------------
// Name: undoCalculation
// Desc:
//------------------------------------------------------------------------------
void KCalcInputDisplay::undoCalculation()
{
QLineEdit::undo();
if (this->isUndoAvailable() && text().isEmpty()) {
QLineEdit::undo();
QLineEdit::deselect();
}
}
//------------------------------------------------------------------------------
// Name: redoCalculation
// Desc:
//------------------------------------------------------------------------------
void KCalcInputDisplay::redoCalculation()
{
QLineEdit::redo();
if (this->isRedoAvailable() && text().isEmpty()) {
QLineEdit::redo();
QLineEdit::deselect();
}
}
//------------------------------------------------------------------------------
// Name: focusInEvent
// Desc: focusIn, if hardOverwrite, display is cleared,
// then clears overwrite and hardOverwrite flags.
//------------------------------------------------------------------------------
void KCalcInputDisplay::focusInEvent(QFocusEvent *e)
{
QLineEdit::focusInEvent(e);
slotClearOverwrite();
clearHasResult();
}
#include "moc_kcalc_input_display.cpp"
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