pgLab/src/mainwindow.cpp

#include "MainWindow.h"
#include "ui_mainwindow.h"

//#include "QueryResultModel.h"
//#include "QueryExplainModel.h"
#include <QStandardPaths>
#include <QFileDialog>
#include <QMessageBox>
#include <QTextTable>
#include <QTimer>
#include <QElapsedTimer>
#include <windows.h>
#include <algorithm>
#include <QCloseEvent>
#include <QMetaObject>
#include <QMetaMethod>
#include <querytab.h>
#include "util.h"
#include "MasterController.h"
#include "OpenDatabase.h"

namespace pg = Pgsql;


MainWindow::MainWindow(MasterController *master, QWidget *parent)
	: QMainWindow(parent)
	, ui(new Ui::MainWindow)
	, m_masterController(master)
{
	ui->setupUi(this);
	ui->tabWidget->setDocumentMode(true);


	//ui->tabWidget->setTabsClosable(true);
}

MainWindow::~MainWindow()
{
	delete ui;
}

QueryTab* MainWindow::newSqlPage()
{
	QueryTab *qt = new QueryTab(this);
	qt->setConfig(m_config);
	ui->tabWidget->addTab(qt, "Tab");
	ui->tabWidget->setCurrentWidget(qt);
	qt->newdoc();
	return qt;
}

QueryTab *MainWindow::GetActiveQueryTab()
{
	QWidget *widget = ui->tabWidget->currentWidget();
	QueryTab *qt = dynamic_cast<QueryTab*>(widget);
	return qt;
}

void MainWindow::setConfig(const ConnectionConfig &config)
{
	m_config = config;
	auto res = OpenDatabase::createOpenDatabase(config);
	if (res.valid()) {
		m_database = res.get();
	}
	QString title = "pglab - ";
	title += m_config.name().c_str();
	setWindowTitle(title);
	newSqlPage();
}

void MainWindow::QueueTask(TSQueue::t_Callable c)
{
	m_taskQueue.add(c);
	// Theoretically this needs to be only called if the queue was empty because otherwise it already would
	// be busy emptying the queue. For now however I think it is safer to call it just to make sure.
	QMetaObject::invokeMethod(this, "processCallableQueue",	Qt::QueuedConnection); // queues on main thread
}

void MainWindow::processCallableQueue()
{
	if (!m_taskQueue.empty()) {
		auto c = m_taskQueue.pop();
		c();
		if (!m_taskQueue.empty()) {
			QTimer::singleShot(0, this, SLOT(processCallableQueue()));
		}
	}
}

void MainWindow::on_actionLoad_SQL_triggered()
{
	QString home_dir = QStandardPaths::locate(QStandardPaths::HomeLocation, "", QStandardPaths::LocateDirectory);
	QString file_name = QFileDialog::getOpenFileName(this,
		tr("Open sql query"), home_dir, tr("SQL files (*.sql *.txt)"));
	if ( ! file_name.isEmpty()) {
		QueryTab* qt = newSqlPage();
		qt->load(file_name);
	}

}

void MainWindow::on_actionSave_SQL_triggered()
{
	QueryTab *tab = GetActiveQueryTab();
	if (tab) {
		tab->save();
	}
}

void MainWindow::on_actionSave_SQL_as_triggered()
{
	QueryTab *tab = GetActiveQueryTab();
	if (tab) {
		tab->saveAs();
	}

}

void MainWindow::on_actionSave_copy_of_SQL_as_triggered()
{
	QueryTab *tab = GetActiveQueryTab();
	if (tab) {
		tab->saveCopyAs();
	}
}

void MainWindow::on_actionExport_data_triggered()
{
	QueryTab *tab = GetActiveQueryTab();
	if (tab) {
		QString home_dir = QStandardPaths::locate(QStandardPaths::HomeLocation, "", QStandardPaths::LocateDirectory);
		QString file_name = QFileDialog::getSaveFileName(this,
			tr("Export data"), home_dir, tr("CSV file (*.csv)"));

		tab->exportData(file_name);
	}
}

void MainWindow::on_actionClose_triggered()
{
	//close();
	on_tabWidget_tabCloseRequested(ui->tabWidget->currentIndex());
}

void MainWindow::on_actionAbout_triggered()
{
	QMessageBox::about(this, "pgLab 0.1", tr(
			  "Copyrights 2016-2017, Eelke Klein, All Rights Reserved.\n"
			  "\n"
			  "The program is provided AS IS with NO WARRANTY OF ANY KIND,"
			  " INCLUDING THE WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS "
			  "FOR A PARTICULAR PURPOSE.\n"
			  "\n"
			  "This program is dynamically linked with Qt 5.8 Copyright (C) 2016 "
			  "The Qt Company Ltd. https://www.qt.io/licensing/. \n"
			  "\n"
			  "Icons by fatcow http://www.fatcow.com/free-icons provided under Creative Commons "
			  "attribution 3.0 license\n"
			  ));

}

void MainWindow::on_actionExecute_SQL_triggered()
{
	QueryTab *tab = GetActiveQueryTab();
	if (tab) {
		tab->execute();
	}
}

void MainWindow::on_actionExplain_triggered()
{
	QueryTab *tab = GetActiveQueryTab();
	if (tab) {
		tab->explain(false);
	}
}

void MainWindow::on_actionExplain_Analyze_triggered()
{
	QueryTab *tab = GetActiveQueryTab();
	if (tab) {
		tab->explain(true);
	}
}

void MainWindow::on_actionCancel_triggered()
{
	QueryTab *tab = GetActiveQueryTab();
	if (tab) {
		tab->cancel();
	}

}

void MainWindow::closeEvent(QCloseEvent *event)
{
	// TODO collect which files need saving
	std::vector<QString> files_to_save;
	int n = ui->tabWidget->count();
	for (int i = 0; i < n; ++i) {
		QWidget *w = ui->tabWidget->widget(i);
		QueryTab *qt = dynamic_cast<QueryTab*>(w);
		if (qt) {
			if (qt->isChanged()) {
				files_to_save.push_back(qt->fileName());
			}
		}
	}
//	if (!m_queryTextChanged  || continueWithoutSaving()) {
//		event->accept();
//	}
//	else {
//		event->ignore();
//	}
}

void MainWindow::showEvent(QShowEvent *event)
{
	if (!event->spontaneous()) {
//		m_queryTextChanged = false;
	}
	event->accept();
}

void MainWindow::on_actionNew_SQL_triggered()
{
	newSqlPage()->newdoc();
}

void MainWindow::on_tabWidget_tabCloseRequested(int index)
{
	QWidget *widget = ui->tabWidget->widget(index);
	QueryTab *qt = dynamic_cast<QueryTab*>(widget);
	if (qt->canClose()) {
		ui->tabWidget->removeTab(index);
	}

}


void MainWindow::on_actionShow_connection_manager_triggered()
{
	m_masterController->showConnectionManager();
}

void MainWindow::on_actionCopy_triggered()
{
	// What should be copied?

	QWidget *w = QApplication::focusWidget();
	QTableView *tv = dynamic_cast<QTableView*>(w);
	if (tv) {
		copySelectionToClipboard(tv);
	}
	else {
		const QMetaObject *meta = w->metaObject();
		int i = meta->indexOfSlot("copy");
		if (i != -1) {
			QMetaMethod method = meta->method(i);
			method.invoke(w, Qt::AutoConnection);
		}
	}
	//this->ui->
}



void MainWindow::on_actionCopy_as_C_string_triggered()
{
	// Find which edit is active, copy the selected text or all text if no selection present
	// Put quote's around each line and add escapes.

	QueryTab *tab = GetActiveQueryTab();
	if (tab) {
		tab->copyQueryAsCString();
	}
}