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subsurface/desktop-widgets/printdialog.cpp
Berthold Stoeger 0cbb448740 cleanup: make templateOptions and printOptions reference types 
These two structs describe options used during printing.
They are passed through numerous classes as pointer. In this
case, reference semantics are preferred, as references:
 - can never be null
 - can not change during their lifetime
This not only helps the compiler, as it can optimize away null
checks, but also your fellow coder. Moreover, it prevents
unintentional creation of uninitialized references: one can't
create an instance of a class without initializing a reference
member. It does not prevent references from going dangling.
However, pointers have the same disadvantage.

Contains a few whitespace cleanups.

Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
2020-12-17 13:03:56 -08:00

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// SPDX-License-Identifier: GPL-2.0
#include "printdialog.h"
#include "printoptions.h"
#include "mainwindow.h"
#ifndef NO_PRINTING
#include <QProgressBar>
#include <QPrintPreviewDialog>
#include <QPrintDialog>
#include <QFileDialog>
#include <QShortcut>
#include <QSettings>
#include <QMessageBox>
#include <QDialogButtonBox>
#define SETTINGS_GROUP "PrintDialog"
template_options::color_palette_struct ssrf_colors, almond_colors, blueshades_colors, custom_colors;
PrintDialog::PrintDialog(QWidget *parent) :
QDialog(parent, QFlag(0)),
printer(NULL),
qprinter(NULL)
{
// initialize const colors
ssrf_colors.color1 = QColor::fromRgb(0xff, 0xff, 0xff);
ssrf_colors.color2 = QColor::fromRgb(0xa6, 0xbc, 0xd7);
ssrf_colors.color3 = QColor::fromRgb(0xef, 0xf7, 0xff);
ssrf_colors.color4 = QColor::fromRgb(0x34, 0x65, 0xa4);
ssrf_colors.color5 = QColor::fromRgb(0x20, 0x4a, 0x87);
ssrf_colors.color6 = QColor::fromRgb(0x17, 0x37, 0x64);
almond_colors.color1 = QColor::fromRgb(255, 255, 255);
almond_colors.color2 = QColor::fromRgb(253, 204, 156);
almond_colors.color3 = QColor::fromRgb(243, 234, 207);
almond_colors.color4 = QColor::fromRgb(136, 160, 150);
almond_colors.color5 = QColor::fromRgb(187, 171, 139);
almond_colors.color6 = QColor::fromRgb(0, 0, 0);
blueshades_colors.color1 = QColor::fromRgb(255, 255, 255);
blueshades_colors.color2 = QColor::fromRgb(142, 152, 166);
blueshades_colors.color3 = QColor::fromRgb(182, 192, 206);
blueshades_colors.color4 = QColor::fromRgb(31, 49, 75);
blueshades_colors.color5 = QColor::fromRgb(21, 45, 84);
blueshades_colors.color6 = QColor::fromRgb(0, 0, 0);
// check if the options were previously stored in the settings; if not use some defaults.
QSettings s;
s.beginGroup(SETTINGS_GROUP);
printOptions.type = (print_options::print_type)s.value("type", print_options::DIVELIST).toInt();
printOptions.print_selected = s.value("print_selected", true).toBool();
printOptions.color_selected = s.value("color_selected", true).toBool();
printOptions.landscape = s.value("landscape", false).toBool();
printOptions.p_template = s.value("template_selected", "one_dive.html").toString();
printOptions.resolution = s.value("resolution", 600).toInt();
templateOptions.font_index = s.value("font", 0).toInt();
templateOptions.font_size = s.value("font_size", 9).toDouble();
templateOptions.color_palette_index = s.value("color_palette", SSRF_COLORS).toInt();
templateOptions.line_spacing = s.value("line_spacing", 1).toDouble();
templateOptions.border_width = s.value("border_width", 1).toInt();
custom_colors.color1 = QColor(s.value("custom_color_1", ssrf_colors.color1).toString());
custom_colors.color2 = QColor(s.value("custom_color_2", ssrf_colors.color2).toString());
custom_colors.color3 = QColor(s.value("custom_color_3", ssrf_colors.color3).toString());
custom_colors.color4 = QColor(s.value("custom_color_4", ssrf_colors.color4).toString());
custom_colors.color5 = QColor(s.value("custom_color_5", ssrf_colors.color5).toString());
s.endGroup();
// handle cases from old QSettings group
if (templateOptions.font_size < 9) {
templateOptions.font_size = 9;
}
if (templateOptions.line_spacing < 1) {
templateOptions.line_spacing = 1;
}
switch (templateOptions.color_palette_index) {
case SSRF_COLORS: // default Subsurface derived colors
templateOptions.color_palette = ssrf_colors;
break;
case ALMOND: // almond
templateOptions.color_palette = almond_colors;
break;
case BLUESHADES: // blueshades
templateOptions.color_palette = blueshades_colors;
break;
case CUSTOM: // custom
templateOptions.color_palette = custom_colors;
break;
}
// create a print options object and pass our options struct
optionsWidget = new PrintOptions(this, printOptions, templateOptions);
QVBoxLayout *layout = new QVBoxLayout(this);
setLayout(layout);
layout->addWidget(optionsWidget);
progressBar = new QProgressBar();
progressBar->setMinimum(0);
progressBar->setMaximum(100);
progressBar->setValue(0);
progressBar->setTextVisible(false);
layout->addWidget(progressBar);
QHBoxLayout *hLayout = new QHBoxLayout();
layout->addLayout(hLayout);
QPushButton *printButton = new QPushButton(tr("P&rint"));
connect(printButton, SIGNAL(clicked(bool)), this, SLOT(printClicked()));
QPushButton *previewButton = new QPushButton(tr("&Preview"));
connect(previewButton, SIGNAL(clicked(bool)), this, SLOT(previewClicked()));
QPushButton *exportHtmlButton = new QPushButton(tr("Export Html"));
connect(exportHtmlButton, SIGNAL(clicked(bool)), this, SLOT(exportHtmlClicked()));
QDialogButtonBox *buttonBox = new QDialogButtonBox;
buttonBox->addButton(QDialogButtonBox::Cancel);
buttonBox->addButton(printButton, QDialogButtonBox::AcceptRole);
buttonBox->addButton(previewButton, QDialogButtonBox::ActionRole);
buttonBox->addButton(exportHtmlButton, QDialogButtonBox::AcceptRole);
connect(buttonBox, SIGNAL(rejected()), this, SLOT(reject()));
hLayout->addWidget(buttonBox);
setWindowTitle(tr("Print"));
setWindowIcon(QIcon(":subsurface-icon"));
QShortcut *close = new QShortcut(QKeySequence(Qt::CTRL + Qt::Key_W), this);
connect(close, SIGNAL(activated()), this, SLOT(close()));
QShortcut *quit = new QShortcut(QKeySequence(Qt::CTRL + Qt::Key_Q), this);
connect(quit, SIGNAL(activated()), parent, SLOT(close()));
// seems to be the most reliable way to track for all sorts of dialog disposal.
connect(this, SIGNAL(finished(int)), this, SLOT(onFinished()));
}
PrintDialog::~PrintDialog()
{
delete qprinter;
delete printer;
}
void PrintDialog::onFinished()
{
QSettings s;
s.beginGroup(SETTINGS_GROUP);
// save print paper settings
s.setValue("type", printOptions.type);
s.setValue("print_selected", printOptions.print_selected);
s.setValue("color_selected", printOptions.color_selected);
s.setValue("template_selected", printOptions.p_template);
s.setValue("resolution", printOptions.resolution);
// save template settings
s.setValue("font", templateOptions.font_index);
s.setValue("font_size", templateOptions.font_size);
s.setValue("color_palette", templateOptions.color_palette_index);
s.setValue("line_spacing", templateOptions.line_spacing);
s.setValue("border_width", templateOptions.border_width);
// save custom colors
s.setValue("custom_color_1", custom_colors.color1.name());
s.setValue("custom_color_2", custom_colors.color2.name());
s.setValue("custom_color_3", custom_colors.color3.name());
s.setValue("custom_color_4", custom_colors.color4.name());
s.setValue("custom_color_5", custom_colors.color5.name());
}
void PrintDialog::createPrinterObj()
{
// create a new printer object
if (!printer) {
qprinter = new QPrinter();
qprinter->setResolution(printOptions.resolution);
qprinter->setOrientation((QPrinter::Orientation)printOptions.landscape);
printer = new Printer(qprinter, printOptions, templateOptions, Printer::PRINT);
}
}
void PrintDialog::previewClicked(void)
{
createPrinterObj();
QPrintPreviewDialog previewDialog(qprinter, this, Qt::Window
| Qt::CustomizeWindowHint | Qt::WindowCloseButtonHint
| Qt::WindowTitleHint);
connect(&previewDialog, SIGNAL(paintRequested(QPrinter *)), this, SLOT(onPaintRequested(QPrinter *)));
previewDialog.exec();
}
void PrintDialog::exportHtmlClicked(void)
{
createPrinterObj();
QString saveFileName = printOptions.p_template;
QString filename = existing_filename ?: prefs.default_filename;
QFileInfo fi(filename);
filename = fi.absolutePath().append(QDir::separator()).append(saveFileName);
QString htmlExportFilename = QFileDialog::getSaveFileName(this, tr("Filename to export html to"),
filename, tr("Html file") + " (*.html)");
if (!htmlExportFilename.isEmpty()) {
QFile file(htmlExportFilename);
file.open(QIODevice::WriteOnly);
connect(printer, SIGNAL(progessUpdated(int)), progressBar, SLOT(setValue(int)));
file.write(printer->exportHtml().toUtf8());
file.close();
close();
}
}
void PrintDialog::printClicked(void)
{
createPrinterObj();
QPrintDialog printDialog(qprinter, this);
if (printDialog.exec() == QDialog::Accepted) {
connect(printer, SIGNAL(progessUpdated(int)), progressBar, SLOT(setValue(int)));
printer->print();
close();
}
}
void PrintDialog::onPaintRequested(QPrinter*)
{
createPrinterObj();
connect(printer, SIGNAL(progessUpdated(int)), progressBar, SLOT(setValue(int)));
printer->print();
progressBar->setValue(0);
disconnect(printer, SIGNAL(progessUpdated(int)), progressBar, SLOT(setValue(int)));
}
#endif
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