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//===========================================
// Lumina Desktop source code
// Copyright (c) 2017, Ken Moore
// Available under the 3-clause BSD license
// See the LICENSE file for full details
//===========================================
#include "mainUI.h"
#include "ui_mainUI.h"
#include <QPainter>
#include <QImage>
#include <QSize>
#include <QFileDialog>
#include <QInputDialog>
#include <QDebug>
#include <QApplication>
#include <LuminaXDG.h>
MainUI::MainUI() : QMainWindow(), ui(new Ui::MainUI()){
ui->setupUi(this);
this->setWindowTitle(tr("Lumina PDF Viewer"));
this->setWindowIcon( LXDG::findIcon("application-pdf","unknown"));
lastdir = QDir::homePath();
Printer = new QPrinter();
WIDGET = new QPrintPreviewWidget(Printer, this);
this->setCentralWidget(WIDGET);
connect(WIDGET, SIGNAL(paintRequested(QPrinter*)), this, SLOT(paintOnWidget(QPrinter*)) );
DOC = 0;
PrintDLG = new QPrintDialog(Printer,this);
connect(PrintDLG, SIGNAL(accepted(QPrinter*)), this, SLOT(paintOnWidget(QPrinter*)) ); //Can change to PaintToPrinter() later
//Create the other interface widgets
progress = new QProgressBar(this);
progress->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Preferred);
progress->setFormat("%v/%m (%p%)"); // [current]/[total]
progAct = ui->toolBar->addWidget(progress);
progAct->setVisible(false);
//Put the various actions into logical groups
QActionGroup *tmp = new QActionGroup(this);
tmp->setExclusive(true);
tmp->addAction(ui->actionFit_Width);
tmp->addAction(ui->actionFit_Page);
ui->actionFit_Page->setChecked(true);
tmp = new QActionGroup(this);
tmp->setExclusive(true);
tmp->addAction(ui->actionSingle_Page);
tmp->addAction(ui->actionDual_Pages);
tmp->addAction(ui->actionAll_Pages);
ui->actionSingle_Page->setChecked(true);
//Connect up the buttons
connect(ui->actionClose, SIGNAL(triggered()), this, SLOT(close()) );
connect(ui->actionPrint, SIGNAL(triggered()), PrintDLG, SLOT(open()) );
connect(ui->actionFit_Width, SIGNAL(triggered()), WIDGET, SLOT(fitToWidth()) );
connect(ui->actionFit_Page, SIGNAL(triggered()), WIDGET, SLOT(fitInView()) );
connect(ui->actionOpen_PDF, SIGNAL(triggered()), this, SLOT(OpenNewFile()) );
connect(ui->actionSingle_Page, SIGNAL(triggered()), WIDGET, SLOT(setSinglePageViewMode()) );
connect(ui->actionDual_Pages, SIGNAL(triggered()), WIDGET, SLOT(setFacingPagesViewMode()) );
connect(ui->actionAll_Pages, SIGNAL(triggered()), WIDGET, SLOT(setAllPagesViewMode()) );
//Setup all the icons
ui->actionPrint->setIcon( LXDG::findIcon("document-print",""));
ui->actionClose->setIcon( LXDG::findIcon("window-close",""));
ui->actionFit_Width->setIcon(LXDG::findIcon("zoom-fit-width",""));
ui->actionFit_Page->setIcon(LXDG::findIcon("zoom-fit-best",""));
ui->actionOpen_PDF->setIcon(LXDG::findIcon("document-open",""));
ui->actionSingle_Page->setIcon(LXDG::findIcon("view-preview",""));
ui->actionDual_Pages->setIcon(LXDG::findIcon("view-split-left-right",""));
ui->actionAll_Pages->setIcon(LXDG::findIcon("view-grid",""));
}
MainUI::~MainUI(){
}
void MainUI::loadFile(QString path){
if(!QFile::exists(path) || path.isEmpty() ){ return; }
Poppler::Document *TDOC = Poppler::Document::load(path);
if(TDOC==0){
qDebug() << "Could not open file:" << path;
return;
}else if(TDOC->isLocked()){
//Prompt for password to unlock the document
QString pass = "";
bool ok = true; //flag this to go into the loop the first time (if password prompt is cancelled - this becomes false)
while( (ok ? true : !TDOC->unlock(QByteArray(), pass.toLocal8Bit())) ){ //make sure the unlock function is only called when ok is true
pass = QInputDialog::getText(this, tr("Unlock PDF"), tr("Password:"), QLineEdit::Password, "", &ok);
}
if(TDOC->isLocked()){ return; } //Cancelled - still locked
}
if(DOC!=0){
//Clear out the old document first
delete DOC;
DOC=0;
}
DOC = TDOC; //Save this for later
qDebug() << "Opening File:" << path;
this->setWindowTitle(DOC->title());
if(this->windowTitle().isEmpty()){ this->setWindowTitle(path.section("/",-1)); }
//Setup the Document
Poppler::Page *PAGE = DOC->page(0);
if(PAGE!=0){
lastdir = path.section("/",0,-2); //save this for later
Printer->setPageSize( QPageSize(PAGE->pageSize(), QPageSize::Point) );
switch(PAGE->orientation()){
case Poppler::Page::Landscape:
Printer->setOrientation(QPrinter::Landscape); break;
default:
Printer->setOrientation(QPrinter::Portrait);
}
delete PAGE;
WIDGET->updatePreview(); //start loading the file preview
}
}
void MainUI::paintOnWidget(QPrinter *PRINTER){
if(DOC==0){ return; }
//this->show();
//QApplication::processEvents();
int pages = DOC->numPages();
int firstpage = 0;
//qDebug() << "Start Rendering PDF:" << PRINTER->fromPage() << PRINTER->toPage();
if(PRINTER->fromPage() != PRINTER->toPage() || PRINTER->fromPage()!=0){
firstpage = PRINTER->fromPage() - 1;
pages = PRINTER->toPage();
}
qDebug() << " - Generating Pages:" << firstpage << pages;
//Now start painting all the pages onto the widget
QRectF size = PRINTER->pageRect(QPrinter::DevicePixel);
QSize DPI(PRINTER->resolution(),PRINTER->resolution());
QPainter painter(PRINTER);
//qDebug() << "Set progress bar range:" << firstpage+1 << pages;
progress->setRange(firstpage+1,pages+1);
//progress->setValue(firstpage);
progAct->setVisible(true);
for(int i=firstpage; i<pages; i++){
//qDebug() << "Loading Page:" << i;
progress->setValue(i+1);
//qDebug() << " - ProcessEvents";
QApplication::processEvents();
//Now paint this page on the printer
//qDebug() << " - Load Poppler Page";
if(i != firstpage){ PRINTER->newPage(); } //this is the start of the next page (not needed for first)
Poppler::Page *PAGE = DOC->page(i);
if(PAGE!=0){
painter.drawImage(0,0,PAGE->renderToImage(DPI.width(), DPI.height()).scaled(size.width(), size.height(), Qt::KeepAspectRatio, Qt::SmoothTransformation) );
}else{
painter.drawImage(0,0,QImage());
}
if(PAGE!=0){ delete PAGE; }
//QApplication::processEvents();
}
//qDebug() << "Done Loading Pages";
progAct->setVisible(false);
}
void MainUI::OpenNewFile(){
//Prompt for a file
QString path = QFileDialog::getOpenFileName(this, tr("Open PDF"), lastdir, tr("PDF Documents (*.pdf)"));
//Now Open it
if(!path.isEmpty()){ loadFile(path); }
}
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