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Albeit that I need to figure out how layouts work to keep that request view at least centred.
243 lines
6.7 KiB
C++
243 lines
6.7 KiB
C++
#include <QtWidgets>
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#include <QObject>
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#include <QStandardPaths>
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#include "mainwindow.h"
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#include "timer.h"
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#include "../../Numeric/CRC.hpp"
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/*
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General Qt implementation notes:
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* it seems like Qt doesn't offer a way to constrain the aspect ratio of a view by constraining
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the size of the window (i.e. you can use a custom layout to constrain a view, but that won't
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affect the window, so isn't useful for this project). Therefore the emulation window
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*/
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MainWindow::MainWindow(QWidget *parent)
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: QMainWindow(parent)
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, ui(new Ui::MainWindow)
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{
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ui->setupUi(this);
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createActions();
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// Set up the emulation timer. Bluffer's guide: the QTimer will post an
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// event to an event loop. QThread is a thread with an event loop.
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// My class, Timer, will be wired up to receive the QTimer's events.
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qTimer = std::make_unique<QTimer>(this);
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qTimer->setInterval(1);
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timerThread = std::make_unique<QThread>(this);
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timer = std::make_unique<Timer>();
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timer->moveToThread(timerThread.get());
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connect(qTimer.get(), SIGNAL(timeout()), timer.get(), SLOT(tick()));
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// Start the thread and timer.
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// TODO: not until there's actually something to display.
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timerThread->start();
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qTimer->start();
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// Hide the missing ROMs box unless or until it's needed; grab the text it
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// began with as a prefix for future mutation.
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ui->missingROMsBox->setVisible(false);
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romRequestBaseText = ui->missingROMsBox->toPlainText();
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}
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void MainWindow::createActions() {
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// Create a file menu.
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QMenu *fileMenu = menuBar()->addMenu(tr("&File"));
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// QAction *newAct = new QAction(tr("&New"), this);
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// newAct->setShortcuts(QKeySequence::New);
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// newAct->setStatusTip(tr("Create a new file"));
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// connect(newAct, &QAction::triggered, this, &MainWindow::newFile);
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// fileMenu->addAction(newAct);
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// Add file option: 'Open..."
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QAction *openAct = new QAction(tr("&Open..."), this);
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openAct->setShortcuts(QKeySequence::Open);
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openAct->setStatusTip(tr("Open an existing file"));
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connect(openAct, &QAction::triggered, this, &MainWindow::open);
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fileMenu->addAction(openAct);
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}
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void MainWindow::open() {
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QString fileName = QFileDialog::getOpenFileName(this);
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if(!fileName.isEmpty()) {
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targets = Analyser::Static::GetTargets(fileName.toStdString());
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if(targets.empty()) {
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qDebug() << "Not media:" << fileName;
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} else {
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qDebug() << "Got media:" << fileName;
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launchMachine();
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}
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}
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}
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MainWindow::~MainWindow() {
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// Stop the timer by asking its QThread to exit and
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// waiting for it to do so.
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timerThread->exit();
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while(timerThread->isRunning());
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}
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// MARK: Machine launch.
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namespace {
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std::unique_ptr<std::vector<uint8_t>> fileContentsAndClose(FILE *file) {
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auto data = std::make_unique<std::vector<uint8_t>>();
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fseek(file, 0, SEEK_END);
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data->resize(std::ftell(file));
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fseek(file, 0, SEEK_SET);
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size_t read = fread(data->data(), 1, data->size(), file);
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fclose(file);
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if(read == data->size()) {
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return data;
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}
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return nullptr;
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}
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}
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void MainWindow::launchMachine() {
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const QStringList appDataLocations = QStandardPaths::standardLocations(QStandardPaths::AppDataLocation);
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missingRoms.clear();
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ROMMachine::ROMFetcher rom_fetcher = [&appDataLocations, this]
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(const std::vector<ROMMachine::ROM> &roms) -> std::vector<std::unique_ptr<std::vector<uint8_t>>> {
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std::vector<std::unique_ptr<std::vector<uint8_t>>> results;
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for(const auto &rom: roms) {
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FILE *file = nullptr;
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for(const auto &path: appDataLocations) {
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const std::string source = path.toStdString() + "/ROMImages/" + rom.machine_name + "/" + rom.file_name;
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const std::string nativeSource = QDir::toNativeSeparators(QString::fromStdString(source)).toStdString();
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qDebug() << "Taking a run at " << nativeSource.c_str();
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file = fopen(nativeSource.c_str(), "rb");
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if(file) break;
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}
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if(file) {
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auto data = fileContentsAndClose(file);
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if(data) {
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results.push_back(std::move(data));
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continue;
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}
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}
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results.push_back(nullptr);
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missingRoms.push_back(rom);
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}
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return results;
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};
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Machine::Error error;
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std::unique_ptr<Machine::DynamicMachine> machine(Machine::MachineForTargets(targets, rom_fetcher, error));
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switch(error) {
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default:
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ui->missingROMsBox->setVisible(false);
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uiPhase = UIPhase::RunningMachine;
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// TODO: launch machine.
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break;
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case Machine::Error::MissingROM: {
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ui->missingROMsBox->setVisible(true);
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uiPhase = UIPhase::RequestingROMs;
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// Populate request text.
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QString requestText = romRequestBaseText;
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size_t index = 0;
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for(const auto rom: missingRoms) {
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requestText += "• ";
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requestText += rom.descriptive_name.c_str();
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++index;
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if(index == missingRoms.size()) {
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requestText += ".\n";
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continue;
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}
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if(index == missingRoms.size() - 1) {
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requestText += "; and\n";
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continue;
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}
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requestText += ";\n";
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}
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ui->missingROMsBox->setPlainText(requestText);
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} break;
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}
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}
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void MainWindow::dragEnterEvent(QDragEnterEvent* event) {
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// Always accept dragged files.
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if(event->mimeData()->hasUrls())
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event->accept();
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}
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void MainWindow::dropEvent(QDropEvent* event) {
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if(!event->mimeData()->hasUrls()) {
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return;
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}
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event->accept();
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switch(uiPhase) {
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case UIPhase::NoFileSelected:
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// Treat exactly as a File -> Open... .
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break;
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case UIPhase::RequestingROMs: {
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// Attempt to match up the dragged files to the requested ROM list;
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// if and when they match, copy to a writeable QStandardPaths::AppDataLocation
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// and try launchMachine() again.
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bool foundROM = false;
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const auto appDataLocation = QStandardPaths::writableLocation(QStandardPaths::AppDataLocation).toStdString();
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for(const auto &url: event->mimeData()->urls()) {
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const char *const name = url.toLocalFile().toUtf8();
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FILE *const file = fopen(name, "rb");
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const auto contents = fileContentsAndClose(file);
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if(!contents) continue;
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CRC::CRC32 generator;
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const uint32_t crc = generator.compute_crc(*contents);
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for(const auto &rom: missingRoms) {
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if(std::find(rom.crc32s.begin(), rom.crc32s.end(), crc) != rom.crc32s.end()) {
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foundROM = true;
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// Ensure the destination folder exists.
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const std::string path = appDataLocation + "/ROMImages/" + rom.machine_name;
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QDir dir(QString::fromStdString(path));
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if (!dir.exists())
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dir.mkpath(".");
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// Write into place.
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const std::string destination = QDir::toNativeSeparators(QString::fromStdString(path+ "/" + rom.file_name)).toStdString();
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FILE *const target = fopen(destination.c_str(), "wb");
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fwrite(contents->data(), 1, contents->size(), target);
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fclose(target);
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}
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}
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}
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if(foundROM) launchMachine();
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} break;
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case UIPhase::RunningMachine:
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// Attempt to insert into the running machine.
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qDebug() << "Should start machine";
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break;
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}
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}
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