Remember folder used for savings or opening files most recently

When you open or save files like simulation INI files or image files with HaloRay, the folder is remembered. The next time you open the file dialog, it opens the same folder, unless it has stopped existing.
naavis · Jul 23, 2022 · 127478f · 127478f
1 parent e360228
commit 127478f
Show file tree

Hide file tree

Showing 3 changed files with 38 additions and 8 deletions.
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -15,6 +15,9 @@ and this project adheres to
   Color to a polynomial fitted to data provided by Warren and Brandt in their
   paper Optical Constants of Ice from The Ultraviolet to The Microwave, which
   is what HaloPoint 2.0 used to use
+- HaloRay now remembers which folder you opened last when loading or saving
+  files like simulation parameter files or images, and opens the file dialog
+  picker in that same folder the next time
 
 ## 4.0.1 - 2021-08-26
 

diff --git a/src/haloray-core/gui/mainWindow.cpp b/src/haloray-core/gui/mainWindow.cpp
@@ -98,39 +98,43 @@ MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent), m_previousTimedIt
         auto defaultFilename = QString("haloray_%1.png")
                                    .arg(currentTime)
                                    .replace(":", "-");
+        auto defaultFilePath = getLatestAccessedFolder().absoluteFilePath(defaultFilename);
         QString filename = QFileDialog::getSaveFileName(this,
                                                         tr("Save File"),
-                                                        defaultFilename,
+                                                        defaultFilePath,
                                                         tr("Images (*.png)"));
 
-        if (!filename.isNull())
-        {
-            image.save(filename, "PNG", 50);
-        }
+        if (filename.isNull()) return;
+
+        image.save(filename, "PNG", 50);
+        updateLatestAccessedFolder(filename);
     });
     connect(m_saveSimulationAction, &QAction::triggered, [this]() {
         auto currentTime = QDateTime::currentDateTimeUtc().toString(Qt::DateFormat::ISODate);
         auto defaultFilename = QString("haloray_sim_%1.ini")
                                    .arg(currentTime)
                                    .replace(":", "-");
+        auto defaultFilePath = getLatestAccessedFolder().absoluteFilePath(defaultFilename);
         QString filename = QFileDialog::getSaveFileName(this,
                                                         tr("Save File"),
-                                                        defaultFilename,
+                                                        defaultFilePath,
                                                         tr("Simulation files (*.ini)"));
 
         if (filename.isNull()) return;
 
         StateSaver::SaveState(filename, m_engine, m_crystalRepository.get());
+        updateLatestAccessedFolder(filename);
     });
     connect(m_loadSimulationAction, &QAction::triggered, [this]() {
         QString filename = QFileDialog::getOpenFileName(this,
                                                         tr("Open file"),
-                                                        QString(),
+                                                        getLatestAccessedFolder().absolutePath(),
                                                         tr("Simulation files (*.ini)"));
 
         if (filename.isNull()) return;
 
         StateSaver::LoadState(filename, m_simulationStateModel, m_crystalModel);
+        updateLatestAccessedFolder(filename);
     });
     connect(m_openCrystalPreviewWindow, &QAction::triggered, [this]() {
         auto previewWindow = new CrystalPreviewWindow(m_crystalModel, m_crystalSettingsWidget->getCurrentPopulationIndex(), this);
@@ -273,4 +277,24 @@ void HaloRay::MainWindow::restartSimulation()
     m_openGLWidget->update();
 }
 
+QDir MainWindow::getLatestAccessedFolder() const
+{
+    QSettings settings;
+    QString pathString = settings.value("filedialog/latestFolder", QString()).toString();
+    QDir dir(pathString);
+    if (dir.exists()) {
+        return dir;
+    }
+
+    return QDir();
+}
+
+void MainWindow::updateLatestAccessedFolder(QString fileOrDirPath)
+{
+    QFileInfo fileInfo(fileOrDirPath);
+    QString path = fileInfo.absoluteDir().path();
+    QSettings settings;
+    settings.setValue("filedialog/latestFolder", path);
+}
+
 }
diff --git a/src/haloray-core/gui/mainWindow.h b/src/haloray-core/gui/mainWindow.h
@@ -4,11 +4,11 @@
 #include <QTimer>
 #include "gui/models/simulationStateModel.h"
 
-
 class QDoubleSpinBox;
 class QProgressBar;
 class QScrollArea;
 class QAction;
+class QDir;
 
 namespace HaloRay
 {
@@ -39,6 +39,9 @@ class MainWindow : public QMainWindow
     void setupRenderTimer();
     void restartSimulation();
 
+    QDir getLatestAccessedFolder() const;
+    void updateLatestAccessedFolder(QString fileOrDirPath);
+
     GeneralSettingsWidget *m_generalSettingsWidget;
     CrystalSettingsWidget *m_crystalSettingsWidget;
     ViewSettingsWidget *m_viewSettingsWidget;