Viewer::Viewer(const QString &file, QWidget *parent) :
QWidget(parent),
res(NULL),
splitter(NULL),
toc(NULL),
canvas(NULL),
search_bar(NULL),
layout(NULL),
sig_notifier(NULL),
beamer(NULL),
valid(true) {
res = new ResourceManager(file, this);
if (!res->is_valid()) {
if (CFG::get_instance()->get_most_current_value("Settings/quit_on_init_fail").toBool()) {
valid = false;
return;
}
}
search_bar = new SearchBar(file, this, this);
if (!search_bar->is_valid()) {
if (CFG::get_instance()->get_most_current_value("Settings/quit_on_init_fail").toBool()) {
valid = false;
return;
}
}
// setup signal handling
if (socketpair(AF_UNIX, SOCK_STREAM, 0, sig_fd) == -1) {
cerr << "socketpair: " << strerror(errno) << endl;
valid = false;
return;
}
sig_notifier = new QSocketNotifier(sig_fd[1], QSocketNotifier::Read, this);
connect(sig_notifier, SIGNAL(activated(int)), this, SLOT(signal_slot()),
Qt::UniqueConnection);
struct sigaction usr;
usr.sa_handler = Viewer::signal_handler;
sigemptyset(&usr.sa_mask);
usr.sa_flags = SA_RESTART;
if (sigaction(SIGUSR1, &usr, 0) > 0) {
cerr << "sigaction: " << strerror(errno) << endl;
valid = false;
return;
}
setup_keys(this);
beamer = new BeamerWindow(this);
setup_keys(beamer);
splitter = new Splitter(this);
toc = new Toc(this, splitter);
canvas = new Canvas(this, splitter); // beamer must already exist
if (!canvas->is_valid()) {
valid = false;
return;
}
res->connect_canvas();
canvas->update_page_overlay(); // set initial position
splitter->addWidget(toc);
splitter->addWidget(canvas);
splitter->setSizes(QList<int>() << (width() / 4) << (width() * 3 / 4)); // TODO config option
toc->hide();
// load config options
CFG *config = CFG::get_instance();
smooth_scroll_delta = config->get_value("Settings/smooth_scroll_delta").toInt();
screen_scroll_factor = config->get_value("Settings/screen_scroll_factor").toFloat();
layout = new QVBoxLayout();
layout->setContentsMargins(0, 0, 0, 0);
layout->setSpacing(0);
// initialize info bar
QIcon::setThemeName(CFG::get_instance()->get_value("Settings/icon_theme").toString());
info_label_icon.setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
info_password.setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed);
info_widget.setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed);
info_label_text.setWordWrap(true);
info_label_text.setTextFormat(Qt::PlainText);
info_password.setEchoMode(QLineEdit::Password);
info_layout.addWidget(&info_label_icon);
info_layout.addWidget(&info_label_text);
info_layout.addWidget(&info_password);
info_widget.setLayout(&info_layout);
layout->addWidget(&info_widget);
connect(&info_password, SIGNAL(returnPressed()), this, SLOT(reload()),
Qt::UniqueConnection);
update_info_widget();
presenter_progress.setMinimum(1);
presenter_progress.setMaximum(res->get_page_count());
presenter_progress.setValue(canvas->get_layout()->get_page() + 1);
// presenter_progress.setFormat("%v/%m");
presenter_progress.setTextVisible(true);
layout->addWidget(splitter);
layout->addWidget(&presenter_progress);
layout->addWidget(search_bar);
setLayout(layout);
QFileInfo info(res->get_file());
setWindowTitle(QString::fromUtf8("%1 \u2014 katarakt").arg(info.fileName()));
setMinimumSize(50, 50);
resize(500, 500);
search_bar->hide();
info_password.setFocus(Qt::OtherFocusReason); // only works if shown
// apply start options
if (res->is_valid()) {
canvas->get_layout()->scroll_page(config->get_tmp_value("start_page").toInt(), false);
}
if (CFG::get_instance()->get_tmp_value("fullscreen").toBool()) {
toggle_fullscreen();
}
// enable transparency, but only in the right places
setAttribute(Qt::WA_TranslucentBackground);
presenter_progress.setAutoFillBackground(true);
search_bar->setAutoFillBackground(true);
info_widget.setAutoFillBackground(true);
toc->setAutoFillBackground(true);
// the splitter handle has to be opaque, canvas has to be transparent
// problem: either both are transparent or none is
// these functions don't help, the splitter handle is still transparent (depending on theme)
// splitter->handle(0)->setAttribute(Qt::WA_TranslucentBackground, false);
// splitter->handle(0)->setBackgroundRole(QPalette::Window);
// splitter->handle(0)->setAutoFillBackground(true);
}
Canvas::Canvas(Viewer *v, QWidget *parent) :
QWidget(parent),
viewer(v),
triple_click_possible(false),
valid(true) {
setFocusPolicy(Qt::StrongFocus);
// load config options
CFG *config = CFG::get_instance();
{
bool ok;
unsigned int color = config->get_value("Settings/background_color").toString().toUInt(&ok, 16);
if (ok) {
background.setRgba(color);
} else {
cerr << "failed to parse background_color" << endl;
}
}
{
bool ok;
unsigned int color = config->get_value("Settings/background_color_fullscreen").toString().toUInt(&ok, 16);
if (ok) {
background_fullscreen.setRgba(color);
} else {
cerr << "failed to parse background_color_fullscreen" << endl;
}
}
mouse_wheel_factor = config->get_value("Settings/mouse_wheel_factor").toInt();
switch (config->get_value("Settings/click_link_button").toInt()) {
case 1: click_link_button = Qt::LeftButton; break;
case 2: click_link_button = Qt::RightButton; break;
case 3: click_link_button = Qt::MidButton; break;
case 4: click_link_button = Qt::XButton1; break;
case 5: click_link_button = Qt::XButton2; break;
default: click_link_button = Qt::NoButton;
}
switch (config->get_value("Settings/drag_view_button").toInt()) {
case 1: drag_view_button = Qt::LeftButton; break;
case 2: drag_view_button = Qt::RightButton; break;
case 3: drag_view_button = Qt::MidButton; break;
case 4: drag_view_button = Qt::XButton1; break;
case 5: drag_view_button = Qt::XButton2; break;
default: drag_view_button = Qt::NoButton;
}
switch (config->get_value("Settings/select_text_button").toInt()) {
case 1: select_text_button = Qt::LeftButton; break;
case 2: select_text_button = Qt::RightButton; break;
case 3: select_text_button = Qt::MidButton; break;
case 4: select_text_button = Qt::XButton1; break;
case 5: select_text_button = Qt::XButton2; break;
default: select_text_button = Qt::NoButton;
}
single_layout = new SingleLayout(viewer, 0);
grid_layout = new GridLayout(viewer, 0);
presenter_layout = new PresenterLayout(viewer, 1);
QString default_layout = config->get_value("Settings/default_layout").toString();
if (default_layout == "grid") {
cur_layout = grid_layout;
} else if (default_layout == "presenter") {
cur_layout = presenter_layout;
} else { // "single" and everything else
cur_layout = single_layout;
}
setup_keys(this);
if (drag_view_button == Qt::LeftButton) {
setCursor(Qt::OpenHandCursor);
} else {
setCursor(Qt::IBeamCursor);
}
// prints the string representation of a key
// cerr << QKeySequence(Qt::Key_Equal).toString().toUtf8().constData() << endl;
goto_line = new GotoLine(viewer->get_res()->get_page_count(), this);
goto_line->move(0, height() - goto_line->height()); // TODO goto_line->height() reports the wrong size
goto_line->hide();
connect(goto_line, SIGNAL(returnPressed()), this, SLOT(goto_page()), Qt::UniqueConnection);
page_overlay = new QLabel(this);
page_overlay->setMargin(1);
page_overlay->setAutoFillBackground(true);
page_overlay->show();
// setup beamer
BeamerWindow *beamer = viewer->get_beamer();
setup_keys(beamer);
if (cur_layout == presenter_layout) {
beamer->show();
viewer->show_progress(true);
} else {
beamer->hide();
viewer->show_progress(false);
}
}