Custom path support (#1333)

also including:
* getting rid of shitty strings
* all new, cleaner ROM handling code
* base for DSi savestates
* GBA slot addons (for now, memory cart)

src/frontend/qt_sdl/PathSettingsDialog.cpp

@@ -0,0 +1,119 @@
+/*
+    Copyright 2016-2021 Arisotura
+
+    This file is part of melonDS.
+
+    melonDS is free software: you can redistribute it and/or modify it under
+    the terms of the GNU General Public License as published by the Free
+    Software Foundation, either version 3 of the License, or (at your option)
+    any later version.
+
+    melonDS is distributed in the hope that it will be useful, but WITHOUT ANY
+    WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+    FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License along
+    with melonDS. If not, see http://www.gnu.org/licenses/.
+*/
+
+#include <stdio.h>
+#include <QFileDialog>
+#include <QMessageBox>
+
+#include "types.h"
+#include "Config.h"
+
+#include "PathSettingsDialog.h"
+#include "ui_PathSettingsDialog.h"
+
+
+PathSettingsDialog* PathSettingsDialog::currentDlg = nullptr;
+
+extern std::string EmuDirectory;
+extern bool RunningSomething;
+
+bool PathSettingsDialog::needsReset = false;
+
+
+PathSettingsDialog::PathSettingsDialog(QWidget* parent) : QDialog(parent), ui(new Ui::PathSettingsDialog)
+{
+    ui->setupUi(this);
+    setAttribute(Qt::WA_DeleteOnClose);
+
+    ui->txtSaveFilePath->setText(QString::fromStdString(Config::SaveFilePath));
+    ui->txtSavestatePath->setText(QString::fromStdString(Config::SavestatePath));
+    ui->txtCheatFilePath->setText(QString::fromStdString(Config::CheatFilePath));
+}
+
+PathSettingsDialog::~PathSettingsDialog()
+{
+    delete ui;
+}
+
+void PathSettingsDialog::done(int r)
+{
+    needsReset = false;
+
+    if (r == QDialog::Accepted)
+    {
+        std::string saveFilePath = ui->txtSaveFilePath->text().toStdString();
+        std::string savestatePath = ui->txtSavestatePath->text().toStdString();
+        std::string cheatFilePath = ui->txtCheatFilePath->text().toStdString();
+
+        if (   saveFilePath != Config::SaveFilePath
+            || savestatePath != Config::SavestatePath
+            || cheatFilePath != Config::CheatFilePath)
+        {
+            if (RunningSomething
+                && QMessageBox::warning(this, "Reset necessary to apply changes",
+                    "The emulation will be reset for the changes to take place.",
+                    QMessageBox::Ok, QMessageBox::Cancel) != QMessageBox::Ok)
+                return;
+
+            Config::SaveFilePath = saveFilePath;
+            Config::SavestatePath = savestatePath;
+            Config::CheatFilePath = cheatFilePath;
+
+            Config::Save();
+
+            needsReset = true;
+        }
+    }
+
+    QDialog::done(r);
+
+    closeDlg();
+}
+
+void PathSettingsDialog::on_btnSaveFileBrowse_clicked()
+{
+    QString dir = QFileDialog::getExistingDirectory(this,
+                                                     "Select save files path...",
+                                                     QString::fromStdString(EmuDirectory));
+
+    if (dir.isEmpty()) return;
+
+    ui->txtSaveFilePath->setText(dir);
+}
+
+void PathSettingsDialog::on_btnSavestateBrowse_clicked()
+{
+    QString dir = QFileDialog::getExistingDirectory(this,
+                                                     "Select savestates path...",
+                                                     QString::fromStdString(EmuDirectory));
+
+    if (dir.isEmpty()) return;
+
+    ui->txtSavestatePath->setText(dir);
+}
+
+void PathSettingsDialog::on_btnCheatFileBrowse_clicked()
+{
+    QString dir = QFileDialog::getExistingDirectory(this,
+                                                     "Select cheat files path...",
+                                                     QString::fromStdString(EmuDirectory));
+
+    if (dir.isEmpty()) return;
+
+    ui->txtCheatFilePath->setText(dir);
+}