Implements a basic ROM installation loop.

Albeit that I need to figure out how layouts work to keep that request view at least centred.

OSBindings/Qt/mainwindow.cpp

@@ -3,11 +3,9 @@
 #include <QStandardPaths>
 
 #include "mainwindow.h"
-#include "ui_mainwindow.h"
 #include "timer.h"
 
-#include "../../Analyser/Static/StaticAnalyser.hpp"
-#include "../../Machines/Utility/MachineForTarget.hpp"
+#include "../../Numeric/CRC.hpp"
 
 /*
 	General Qt implementation notes:
@@ -41,6 +39,11 @@ MainWindow::MainWindow(QWidget *parent)
 	// TODO: not until there's actually something to display.
 	timerThread->start();
 	qTimer->start();
+
+	// Hide the missing ROMs box unless or until it's needed; grab the text it
+	// began with as a prefix for future mutation.
+	ui->missingROMsBox->setVisible(false);
+	romRequestBaseText = ui->missingROMsBox->toPlainText();
 }
 
 void MainWindow::createActions() {
@@ -65,51 +68,12 @@ void MainWindow::createActions() {
 void MainWindow::open() {
 	QString fileName = QFileDialog::getOpenFileName(this);
 	if(!fileName.isEmpty()) {
-		const auto targets = Analyser::Static::GetTargets(fileName.toStdString());
+		targets = Analyser::Static::GetTargets(fileName.toStdString());
 		if(targets.empty()) {
 			qDebug() << "Not media:" << fileName;
 		} else {
 			qDebug() << "Got media:" << fileName;
-
-			const QStringList appDataLocations = QStandardPaths::standardLocations(QStandardPaths::AppDataLocation);
-			ROMMachine::ROMFetcher rom_fetcher = [&appDataLocations]
-				(const std::vector<ROMMachine::ROM> &roms) -> std::vector<std::unique_ptr<std::vector<uint8_t>>> {
-				std::vector<std::unique_ptr<std::vector<uint8_t>>> results;
-
-				for(const auto &rom: roms) {
-					FILE *file = nullptr;
-					for(const auto &path: appDataLocations) {
-						const std::string source = path.toStdString() + "/ROMImages/" + rom.machine_name + "/" + rom.file_name;
-						const std::string nativeSource = QDir::toNativeSeparators(QString::fromStdString(source)).toStdString();
-
-						qDebug() << "Taking a run at " << nativeSource.c_str();
-
-						file = fopen(nativeSource.c_str(), "rb");
-						if(file) break;
-					}
-
-					if(file) {
-						auto data = std::make_unique<std::vector<uint8_t>>();
-
-						fseek(file, 0, SEEK_END);
-						data->resize(std::ftell(file));
-						fseek(file, 0, SEEK_SET);
-						size_t read = fread(data->data(), 1, data->size(), file);
-						fclose(file);
-
-						if(read == data->size()) {
-							results.push_back(std::move(data));
-						} else {
-							results.push_back(nullptr);
-						}
-					} else {
-						results.push_back(nullptr);
-					}
-				}
-				return results;
-			};
-			Machine::Error error;
-			std::unique_ptr<Machine::DynamicMachine> machine(Machine::MachineForTargets(targets, rom_fetcher, error));
+			launchMachine();
 		}
 	}
 }
@@ -121,3 +85,158 @@ MainWindow::~MainWindow() {
 	while(timerThread->isRunning());
 }
 
+// MARK: Machine launch.
+
+namespace {
+
+std::unique_ptr<std::vector<uint8_t>> fileContentsAndClose(FILE *file) {
+	auto data = std::make_unique<std::vector<uint8_t>>();
+
+	fseek(file, 0, SEEK_END);
+	data->resize(std::ftell(file));
+	fseek(file, 0, SEEK_SET);
+	size_t read = fread(data->data(), 1, data->size(), file);
+	fclose(file);
+
+	if(read == data->size()) {
+		return data;
+	}
+
+	return nullptr;
+}
+
+}
+
+void MainWindow::launchMachine() {
+	const QStringList appDataLocations = QStandardPaths::standardLocations(QStandardPaths::AppDataLocation);
+	missingRoms.clear();
+
+	ROMMachine::ROMFetcher rom_fetcher = [&appDataLocations, this]
+		(const std::vector<ROMMachine::ROM> &roms) -> std::vector<std::unique_ptr<std::vector<uint8_t>>> {
+		std::vector<std::unique_ptr<std::vector<uint8_t>>> results;
+
+		for(const auto &rom: roms) {
+			FILE *file = nullptr;
+			for(const auto &path: appDataLocations) {
+				const std::string source = path.toStdString() + "/ROMImages/" + rom.machine_name + "/" + rom.file_name;
+				const std::string nativeSource = QDir::toNativeSeparators(QString::fromStdString(source)).toStdString();
+
+				qDebug() << "Taking a run at " << nativeSource.c_str();
+
+				file = fopen(nativeSource.c_str(), "rb");
+				if(file) break;
+			}
+
+			if(file) {
+				auto data = fileContentsAndClose(file);
+				if(data) {
+					results.push_back(std::move(data));
+					continue;
+				}
+			}
+
+			results.push_back(nullptr);
+			missingRoms.push_back(rom);
+		}
+		return results;
+	};
+	Machine::Error error;
+	std::unique_ptr<Machine::DynamicMachine> machine(Machine::MachineForTargets(targets, rom_fetcher, error));
+
+	switch(error) {
+		default:
+			ui->missingROMsBox->setVisible(false);
+			uiPhase = UIPhase::RunningMachine;
+
+			// TODO: launch machine.
+		break;
+
+		case Machine::Error::MissingROM: {
+			ui->missingROMsBox->setVisible(true);
+			uiPhase = UIPhase::RequestingROMs;
+
+			// Populate request text.
+			QString requestText = romRequestBaseText;
+			size_t index = 0;
+			for(const auto rom: missingRoms) {
+				requestText += "• ";
+				requestText += rom.descriptive_name.c_str();
+
+				++index;
+				if(index == missingRoms.size()) {
+					requestText += ".\n";
+					continue;
+				}
+				if(index == missingRoms.size() - 1) {
+					requestText += "; and\n";
+					continue;
+				}
+				requestText += ";\n";
+			}
+			ui->missingROMsBox->setPlainText(requestText);
+		} break;
+	}
+}
+
+void MainWindow::dragEnterEvent(QDragEnterEvent* event) {
+	// Always accept dragged files.
+	if(event->mimeData()->hasUrls())
+		event->accept();
+}
+
+void MainWindow::dropEvent(QDropEvent* event) {
+	if(!event->mimeData()->hasUrls()) {
+		return;
+	}
+	event->accept();
+
+	switch(uiPhase) {
+		case UIPhase::NoFileSelected:
+			// Treat exactly as a File -> Open... .
+		break;
+
+		case UIPhase::RequestingROMs: {
+			// Attempt to match up the dragged files to the requested ROM list;
+			// if and when they match, copy to a writeable QStandardPaths::AppDataLocation
+			// and try launchMachine() again.
+
+			bool foundROM = false;
+			const auto appDataLocation = QStandardPaths::writableLocation(QStandardPaths::AppDataLocation).toStdString();
+
+			for(const auto &url: event->mimeData()->urls()) {
+				const char *const name = url.toLocalFile().toUtf8();
+				FILE *const file = fopen(name, "rb");
+				const auto contents = fileContentsAndClose(file);
+				if(!contents) continue;
+
+				CRC::CRC32 generator;
+				const uint32_t crc = generator.compute_crc(*contents);
+
+				for(const auto &rom: missingRoms) {
+					if(std::find(rom.crc32s.begin(), rom.crc32s.end(), crc) != rom.crc32s.end()) {
+						foundROM = true;
+
+						// Ensure the destination folder exists.
+						const std::string path = appDataLocation + "/ROMImages/" + rom.machine_name;
+						QDir dir(QString::fromStdString(path));
+						if (!dir.exists())
+							dir.mkpath(".");
+
+						// Write into place.
+						const std::string destination =  QDir::toNativeSeparators(QString::fromStdString(path+ "/" + rom.file_name)).toStdString();
+						FILE *const target = fopen(destination.c_str(), "wb");
+						fwrite(contents->data(), 1, contents->size(), target);
+						fclose(target);
+					}
+				}
+			}
+
+			if(foundROM) launchMachine();
+		} break;
+
+		case UIPhase::RunningMachine:
+			// Attempt to insert into the running machine.
+			qDebug() << "Should start machine";
+		break;
+	}
+}

OSBindings/Qt/mainwindow.h

@@ -4,6 +4,10 @@
 #include <QMainWindow>
 #include <memory>
 #include "timer.h"
+#include "ui_mainwindow.h"
+
+#include "../../Analyser/Static/StaticAnalyser.hpp"
+#include "../../Machines/Utility/MachineForTarget.hpp"
 
 QT_BEGIN_NAMESPACE
 namespace Ui { class MainWindow; }
@@ -24,6 +28,19 @@ class MainWindow : public QMainWindow {
 		std::unique_ptr<QThread> timerThread;
 		std::unique_ptr<Timer> timer;
 
+		// Initial setup stuff.
+		Analyser::Static::TargetList targets;
+		enum class UIPhase {
+			NoFileSelected, RequestingROMs, RunningMachine
+		} uiPhase = UIPhase::NoFileSelected;
+		void launchMachine();
+
+		QString romRequestBaseText;
+		std::vector<ROMMachine::ROM> missingRoms;
+
+		// File drag and drop is supported.
+		void dragEnterEvent(QDragEnterEvent* event) override;
+		void dropEvent(QDropEvent* event) override;
 
 	private slots:
 		void open();

OSBindings/Qt/mainwindow.ui

@@ -23,18 +23,42 @@
    <string>MainWindow</string>
   </property>
   <widget class="QOpenGLWidget" name="openGLWidget">
-  </widget>
-  <widget class="QMenuBar" name="menubar">
-   <property name="geometry">
-    <rect>
-     <x>0</x>
-     <y>0</y>
-     <width>800</width>
-     <height>22</height>
-    </rect>
-   </property>
+   <widget class="QPlainTextEdit" name="missingROMsBox">
+    <property name="geometry">
+     <rect>
+      <x>170</x>
+      <y>170</y>
+      <width>421</width>
+      <height>231</height>
+     </rect>
+    </property>
+    <property name="sizePolicy">
+     <sizepolicy hsizetype="Maximum" vsizetype="Maximum">
+      <horstretch>0</horstretch>
+      <verstretch>0</verstretch>
+     </sizepolicy>
+    </property>
+    <property name="acceptDrops">
+     <bool>true</bool>
+    </property>
+    <property name="readOnly">
+     <bool>true</bool>
+    </property>
+    <property name="plainText">
+     <string>Clock Signal requires you to provide images of the system ROMs for this machine. They will be stored permanently; you need do this only once.
+
+Please drag and drop the following over this window:
+
+</string>
+    </property>
+   </widget>
   </widget>
   <widget class="QStatusBar" name="statusbar"/>
+  <action name="actionDo_this">
+   <property name="text">
+    <string>Do this</string>
+   </property>
+  </action>
  </widget>
  <resources/>
  <connections/>