begin work on qt gui - basic search & pdf preview

gui/mainwindow.cpp

@@ -0,0 +1,160 @@
+#include <poppler-qt5.h>
+#include <QLabel>
+#include <QtDebug>
+#include <QFileInfo>
+#include <QDesktopServices>
+#include <QUrl>
+#include <QClipboard>
+#include <QSettings>
+#include <QDateTime>
+#include "mainwindow.h"
+#include "ui_mainwindow.h"
+#include "clicklabel.h"
+MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent), ui(new Ui::MainWindow)
+{
+	ui->setupUi(this);
+
+	searchWorker = new SearchWorker(QSettings().value("dbpath").toString());
+	pdfWorker = new PdfWorker();
+	searchWorker->moveToThread(&searchThread);
+	pdfWorker->moveToThread(&pdfWorkerThread);
+	connectSignals();
+	searchThread.start();
+	ui->treeResultsList->setContextMenuPolicy(Qt::ContextMenuPolicy::CustomContextMenu);
+
+	ui->tabWidget->setCurrentIndex(0);
+}
+
+void MainWindow::connectSignals()
+{
+	connect(ui->txtSearch, &QLineEdit::textChanged, this, &MainWindow::lineEditTextChanged);
+	connect(ui->txtSearch, &QLineEdit::returnPressed, this, &MainWindow::lineEditReturnPressed);
+	connect(this, &MainWindow::beginFileSearch, searchWorker, &SearchWorker::searchForFile);
+	connect(this, &MainWindow::beginContentSearch, searchWorker, &SearchWorker::searchForContent);
+	connect(searchWorker, &SearchWorker::searchResultsReady, this, &MainWindow::handleSearchResults);
+	connect(searchWorker, &SearchWorker::searchCancelled, this, &MainWindow::handleCancelledSearch);
+	connect(ui->treeResultsList, &QTreeWidget::itemActivated, this, &MainWindow::treeSearchItemActivated);
+	connect(ui->treeResultsList, &QTreeWidget::customContextMenuRequested, this,
+			&MainWindow::showSearchResultsContextMenu);
+	connect(ui->tabWidget, &QTabWidget::currentChanged, this, &MainWindow::tabChanged);
+	connect(this, &MainWindow::startPdfPreviewGeneration, pdfWorker, &PdfWorker::generatePreviews);
+	connect(pdfWorker, &PdfWorker::previewReady, this, &MainWindow::pdfPreviewReceived);
+	connect(pdfWorker, &PdfWorker::previewsFinished, [&] { this->pdfDirty = false; });
+}
+
+bool MainWindow::pdfTabActive()
+{
+	return ui->tabWidget->currentIndex() == 1;
+}
+
+void MainWindow::tabChanged()
+{
+	if(pdfTabActive() && pdfDirty)
+	{
+		makePdfPreview();
+	}
+}
+
+void MainWindow::pdfPreviewReceived(PdfPreview preview)
+{
+	ClickLabel *label = new ClickLabel();
+	label->setPixmap(QPixmap::fromImage(preview.previewImage));
+	ui->scrollAreaWidgetContents->layout()->addWidget(label);
+	connect(label, &ClickLabel::clicked,
+			[=]() { QDesktopServices::openUrl(QUrl::fromLocalFile(preview.documentPath)); });
+}
+
+void MainWindow::lineEditReturnPressed()
+{
+	if(pdfTabActive() && pdfDirty)
+	{
+		makePdfPreview();
+	}
+}
+
+void MainWindow::lineEditTextChanged()
+{
+	QString q = ui->txtSearch->text();
+	if(q.startsWith("|"))
+	{
+		q = q.mid(1);
+		emit beginContentSearch(q);
+	}
+	else
+	{
+		emit beginFileSearch(q);
+	}
+}
+
+void MainWindow::handleSearchResults(const QVector<SearchResult> &results)
+{
+	this->pdfSearchResults.clear();
+	ui->treeResultsList->clear();
+
+	for(const SearchResult &result : results)
+	{
+		QFileInfo pathInfo(result.path);
+		QString fileName = pathInfo.fileName();
+		QTreeWidgetItem *item = new QTreeWidgetItem(ui->treeResultsList);
+		QDateTime dt = QDateTime::fromSecsSinceEpoch(result.mtime);
+		item->setIcon(0, iconProvider.icon(pathInfo));
+		item->setText(0, fileName);
+		item->setText(1, result.path);
+		item->setText(2, dt.toString(Qt::ISODate));
+		// TODO: this must be user definied or done more intelligently
+		if(this->pdfSearchResults.size() < 300)
+		{
+			if(result.path.endsWith(".pdf"))
+			{
+				this->pdfSearchResults.append(result);
+			}
+		}
+	}
+	ui->treeResultsList->resizeColumnToContents(0);
+	ui->treeResultsList->resizeColumnToContents(1);
+	pdfDirty = !this->pdfSearchResults.empty();
+}
+
+void MainWindow::makePdfPreview()
+{
+	if(!pdfWorkerThread.isRunning())
+		pdfWorkerThread.start();
+	qDeleteAll(ui->scrollAreaWidgetContents->children());
+
+	ui->scrollAreaWidgetContents->setLayout(new QHBoxLayout());
+	emit startPdfPreviewGeneration(this->pdfSearchResults, 0.75);
+}
+
+void MainWindow::handleCancelledSearch()
+{
+}
+
+void MainWindow::treeSearchItemActivated(QTreeWidgetItem *item, int i)
+{
+	QDesktopServices::openUrl(QUrl::fromLocalFile(item->text(1)));
+}
+
+void MainWindow::showSearchResultsContextMenu(const QPoint &point)
+{
+	QTreeWidgetItem *item = ui->treeResultsList->itemAt(point);
+	if(item == nullptr)
+	{
+		return;
+	}
+	QMenu menu("SearchResult", this);
+	menu.addAction("Copy filename to clipboard", [&] { QGuiApplication::clipboard()->setText(item->text(0)); });
+	menu.addAction("Copy full path to clipboard", [&] { QGuiApplication::clipboard()->setText(item->text(1)); });
+	menu.addAction("Open containing folder",
+				   [&]
+				   {
+					   QFileInfo pathinfo(item->text(1));
+					   QString dir = pathinfo.absolutePath();
+					   QDesktopServices::openUrl(QUrl::fromLocalFile(dir));
+				   });
+	menu.exec(QCursor::pos());
+}
+
+MainWindow::~MainWindow()
+{
+	delete ui;
+}