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/*
SPDX-FileCopyrightText: 2021 Antonio Prcela <antonio.prcela@gmail.com>
SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "kcalc_history.h"
#include "kcalc_settings.h"
//------------------------------------------------------------------------------
// Name: KCalcHistory
// Desc: constructor
//------------------------------------------------------------------------------
KCalcHistory::KCalcHistory(QWidget *parent)
: QTextEdit(parent)
{
setReadOnly(true);
setWordWrapMode(QTextOption::WrapAtWordBoundaryOrAnywhere);
setProperty("_breeze_borders_sides", QVariant::fromValue(QFlags{Qt::LeftEdge}));
// Initialize idealPointSizeF_
idealPointSizeF_ = currentFont().pointSizeF();
}
//------------------------------------------------------------------------------
// Name: KCalcHistory
// Desc: destructor
//------------------------------------------------------------------------------
KCalcHistory::~KCalcHistory() = default;
//------------------------------------------------------------------------------
// Name: addToHistory
// Desc: Adds the latest calculations to history window
//------------------------------------------------------------------------------
void KCalcHistory::addToHistory(const QString &str, bool set_new_line_)
{
// QTextEdit's cursor location might be changed by mouse clicks.
// We have to move the cursor to correct position.
// Ensures the cursor goes back to topmost line's end during a calculation.
// 1 + 1 + _
if (!add_new_line_ && !set_new_line_) {
moveCursor(QTextCursor::Start);
moveCursor(QTextCursor::EndOfLine);
}
// add_new_line_ is false on launch and after clearHistory()
// so the first line doesn't get an unnecessary new line
if (add_new_line_) {
moveCursor(QTextCursor::Start);
insertHtml(QStringLiteral("<br>"));
moveCursor(QTextCursor::Start);
add_new_line_ = false;
}
insertHtml(str);
if (set_new_line_) {
moveCursor(QTextCursor::Start);
add_new_line_ = true;
}
setAlignment(Qt::AlignRight);
ensureCursorVisible();
}
//------------------------------------------------------------------------------
// Name: addResultToHistory
// Desc: Used mostly for functions that are not in CalcEngine::Operation
// adds "=" and the result with newline endings
//------------------------------------------------------------------------------
void KCalcHistory::addResultToHistory(const QString &display_content)
{
addToHistory(/*QStringLiteral(" = ") +*/ display_content, true);
}
//------------------------------------------------------------------------------
// Name: addFuncToHistory
// Desc: Adds the current function symbol the history window
//------------------------------------------------------------------------------
void KCalcHistory::addFuncToHistory(const QString &func)
{
QString textToHistory = QStringLiteral(" ") + func + QStringLiteral(" ");
addToHistory(textToHistory, false);
}
//------------------------------------------------------------------------------
// Name: clearHistory
// Desc: Clears the content of the history window
//------------------------------------------------------------------------------
void KCalcHistory::clearHistory()
{
clear();
add_new_line_ = false;
}
//------------------------------------------------------------------------------
// Name: changeSettings
// Desc:
//------------------------------------------------------------------------------
void KCalcHistory::changeSettings()
{
QPalette pal = palette();
pal.setColor(QPalette::Text, KCalcSettings::foreColor());
pal.setColor(QPalette::Base, KCalcSettings::backColor());
setPalette(pal);
setFont(KCalcSettings::historyFont());
}
//------------------------------------------------------------------------------
// Name: setFont
// Desc: Set the base font and recalculate the font size to better fit
//------------------------------------------------------------------------------
void KCalcHistory::setFont(const QFont &font)
{
// Overwrite current baseFont
baseFont_ = font;
updateFont();
}
//------------------------------------------------------------------------------
// Name: updateFont
// Desc: Update font using baseFont to better fit
//------------------------------------------------------------------------------
void KCalcHistory::updateFont(double zoomFactor)
{
// Make a working copy of the font
QFont newFont(baseFont());
// Calculate actual font size by keeping the ratio, keeping previous zoomFactor, using historyFont as minimum size
double ratio = (minimumSize().width() - contentsMargins().left() - contentsMargins().right()) / baseFont().pointSizeF();
idealPointSizeF_ = contentsRect().width() / ratio;
newFont.setPointSizeF(qMax(double(baseFont().pointSizeF()), idealPointSizeF_) * zoomFactor);
// Apply font
QTextEdit::setFont(newFont);
}
//------------------------------------------------------------------------------
// Name: baseFont
// Desc: Returns current baseFont
//------------------------------------------------------------------------------
const QFont &KCalcHistory::baseFont() const
{
return baseFont_;
}
//------------------------------------------------------------------------------
// Name: resizeEvent
// Desc: resize history and adjust font size
//------------------------------------------------------------------------------
void KCalcHistory::resizeEvent(QResizeEvent *event)
{
QTextEdit::resizeEvent(event);
// Determine current zoom
double zoomFactor = currentFont().pointSizeF() / idealPointSizeF_;
// Update font size
updateFont(zoomFactor);
updateGeometry();
}
#include "moc_kcalc_history.cpp"
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