PDF4QT/Pdf4QtLib/sources/pdfwidgetutils.cpp

127 lines
4.2 KiB
C++

// Copyright (C) 2019-2022 Jakub Melka
//
// This file is part of PDF4QT.
//
// PDF4QT is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// with the written consent of the copyright owner, any later version.
//
// PDF4QT 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 Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with PDF4QT. If not, see <https://www.gnu.org/licenses/>.
#include "pdfwidgetutils.h"
#include "pdfdbgheap.h"
#include <QDialog>
#include <QLayout>
#include <QGroupBox>
#ifdef Q_OS_MAC
int qt_default_dpi_x() { return 72; }
int qt_default_dpi_y() { return 72; }
#else
int qt_default_dpi_x() { return 96; }
int qt_default_dpi_y() { return 96; }
#endif
namespace pdf
{
int PDFWidgetUtils::getPixelSize(const QPaintDevice* device, pdf::PDFReal sizeMM)
{
const int width = device->width();
const int height = device->height();
if (width > height)
{
return PDFReal(width) * sizeMM / PDFReal(device->widthMM());
}
else
{
return PDFReal(height) * sizeMM / PDFReal(device->heightMM());
}
}
int PDFWidgetUtils::scaleDPI_x(const QPaintDevice* device, int unscaledSize)
{
const double logicalDPI_x = device->logicalDpiX();
const double defaultDPI_x = qt_default_dpi_x();
return (logicalDPI_x / defaultDPI_x) * unscaledSize;
}
int PDFWidgetUtils::scaleDPI_y(const QPaintDevice* device, int unscaledSize)
{
const double logicalDPI_y = device->logicalDpiY();
const double defaultDPI_y = qt_default_dpi_y();
return (logicalDPI_y / defaultDPI_y) * unscaledSize;
}
PDFReal PDFWidgetUtils::scaleDPI_x(const QPaintDevice* device, PDFReal unscaledSize)
{
const double logicalDPI_x = device->logicalDpiX();
const double defaultDPI_x = qt_default_dpi_x();
return (logicalDPI_x / defaultDPI_x) * unscaledSize;
}
void PDFWidgetUtils::scaleWidget(QWidget* widget, QSize unscaledSize)
{
const double logicalDPI_x = widget->logicalDpiX();
const double logicalDPI_y = widget->logicalDpiY();
const double defaultDPI_x = qt_default_dpi_x();
const double defaultDPI_y = qt_default_dpi_y();
const int width = (logicalDPI_x / defaultDPI_x) * unscaledSize.width();
const int height = (logicalDPI_y / defaultDPI_y) * unscaledSize.height();
widget->resize(width, height);
}
QSize PDFWidgetUtils::scaleDPI(const QPaintDevice* widget, QSize unscaledSize)
{
const double logicalDPI_x = widget->logicalDpiX();
const double logicalDPI_y = widget->logicalDpiY();
const double defaultDPI_x = qt_default_dpi_x();
const double defaultDPI_y = qt_default_dpi_y();
const int width = (logicalDPI_x / defaultDPI_x) * unscaledSize.width();
const int height = (logicalDPI_y / defaultDPI_y) * unscaledSize.height();
return QSize(width, height);
}
void PDFWidgetUtils::style(QWidget* widget)
{
const int dialogMarginX = scaleDPI_x(widget, 12);
const int dialogMarginY = scaleDPI_y(widget, 12);
const int dialogSpacing = scaleDPI_y(widget, 12);
const int groupBoxMarginX = scaleDPI_x(widget, 20);
const int groupBoxMarginY = scaleDPI_y(widget, 20);
const int groupBoxSpacing = scaleDPI_y(widget, 12);
QList<QWidget*> childWidgets = widget->findChildren<QWidget*>();
childWidgets.append(widget);
for (QWidget* childWidget : childWidgets)
{
if (qobject_cast<QGroupBox*>(childWidget))
{
childWidget->layout()->setContentsMargins(groupBoxMarginX, groupBoxMarginY, groupBoxMarginX, groupBoxMarginY);
childWidget->layout()->setSpacing(groupBoxSpacing);
}
else if (qobject_cast<QDialog*>(childWidget))
{
childWidget->layout()->setContentsMargins(dialogMarginX, dialogMarginY, dialogMarginX, dialogMarginY);
childWidget->layout()->setSpacing(dialogSpacing);
}
}
}
} // namespace pdf