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qpageviewer.cpp
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qpageviewer.cpp
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#include "qpageviewer.h"
QPageViewer::QPageViewer(QObject *parent) : QObject(parent),
_show_all(false),
_list_widget(nullptr),
_text_browser(nullptr)
{
}
void QPageViewer::connectWithUI(QListWidget *list_widget, QTextBrowser *text_browser)
{
disconnectUI();
_list_widget = list_widget;
_text_browser = text_browser;
connect(_list_widget, SIGNAL(currentRowChanged(int)), this, SLOT(viewPage(int)));
}
void QPageViewer::disconnectUI()
{
if (_list_widget)
disconnect(_list_widget, SIGNAL(currentRowChanged(int)), this, SLOT(viewPage(int)));
}
void QPageViewer::viewPage(int index)
{
if (_text_browser && _list_widget){
if (index < 0 ){
_text_browser->clear();
}
else if(index < _headers.size()){
if(_list_widget->currentRow() != index)
_list_widget->setCurrentRow(index);
_text_browser->clear();
_text_browser->setTextBackgroundColor(Qt::white);
if (!_show_all){
int i = 0;
while(i<_highlighted.size() && index >= 0){
if (!_highlighted[i].isEmpty())
index--;
i++;
}
index = i-1;
}
_text_browser->setPlainText(_pages[index]);
foreach (const QPoint & selection, _highlighted[index]) {
highlightText(selection.x(), selection.y());
}
}
}
}
void QPageViewer::clear()
{
_headers.clear();
_pages.clear();
_highlighted.clear();
if (_text_browser && _list_widget){
_list_widget->clear();
_text_browser->clear();
}
}
void QPageViewer::addPage(QString header, QString page, QVector<QPoint> highlighted)
{
_headers.append(header);
_pages.append(page);
_highlighted.append(highlighted);
if(_list_widget ){
if(_show_all || !highlighted.isEmpty())
_list_widget->addItem(header);
}
}
void QPageViewer::refreshHeaders(bool show_all)
{
if(_list_widget){
_show_all = show_all;
int row = _list_widget->currentRow();
_list_widget->clear();
if (show_all){
_list_widget->addItems(_headers);
_list_widget->setCurrentRow(row);
}
else{
_list_widget->setCurrentRow(-1);
for(int i = 0; i<_headers.size(); ++i){
if (!_highlighted[i].isEmpty())
_list_widget->addItem(_headers[i]);
}
}
}
}
void QPageViewer::highlightText(const int start_pos, const int length)
{
QTextCharFormat fmt;
fmt.setBackground(Qt::yellow);
QTextCursor cursor(_text_browser->document());
cursor.setPosition(start_pos, QTextCursor::MoveAnchor);
cursor.setPosition(start_pos+length, QTextCursor::KeepAnchor);
cursor.setCharFormat(fmt);
}