Adding --open-dir flag, hotkeys, many screenshots.

src/MainFrame.ui

@@ -1525,6 +1525,9 @@
    <property name="text">
     <string>Center view</string>
    </property>
+   <property name="shortcut">
+    <string>Ctrl+g</string>
+   </property>
   </action>
   <action name="actionShowImage">
    <property name="text">
@@ -1580,6 +1583,9 @@
    <property name="text">
     <string>screenshot</string>
    </property>
+   <property name="shortcut">
+    <string>Ctrl+B</string>
+   </property>
   </action>
  </widget>
  <customwidgets>

src/labeler.cpp

@@ -4,13 +4,37 @@
 
 #include <glow/GlCapabilities.h>
 
+#define FLAG_OPEN_DIR "--open-dir"
+
+std::map<std::string, std::string> parseArgs(int argc, char** argv) {
+  std::map<std::string, std::string> parsedArgs;
+
+  for (int i = 1; i < argc; i++) {
+    std::string flag = argv[i];
+    if (flag == FLAG_OPEN_DIR) {
+      if (argc > i) {
+        parsedArgs[FLAG_OPEN_DIR] = argv[i++ + 1];
+      }
+    }
+  }
+
+  return parsedArgs;
+}
+
 int main(int argc, char** argv) {
   QApplication app(argc, argv);
 
   Mainframe frame;
+  auto parsedArgs = parseArgs(argc, argv);
+
+  if (parsedArgs.find(FLAG_OPEN_DIR) != parsedArgs.end()) {
+    auto dir = parsedArgs[FLAG_OPEN_DIR];
+    std::cout << "Opening dir: " << dir << std::endl;
+    frame.open(QString::fromStdString(dir));
+  }
+
   frame.show();
   frame.resize(1200, 900);
-
 //  std::cout << glow::GlCapabilities::getInstance() << std::endl;
 
   return app.exec();

src/widget/Mainframe.cpp

@@ -9,11 +9,18 @@
 #include <boost/lexical_cast.hpp>
 #include <fstream>
 #include <iostream>
+#include <unistd.h>
+#include <limits.h>
 #include <map>
 
 #include "../data/label_utils.h"
 #include "../data/misc.h"
 
+#include <iostream>
+#include <chrono>
+#include <iomanip>
+#include <sstream>
+
 using namespace glow;
 
 // see https://stackoverflow.com/a/24349347
@@ -477,6 +484,17 @@ Mainframe::Mainframe() : mChangesSinceLastSave(false) {
 
   connect(ui.actionScreenshot, &QAction::triggered, [this]() {
     QImage img = ui.mViewportXYZ->grabFrameBuffer();
+
+    auto now = std::chrono::system_clock::now();
+    std::time_t now_time_t = std::chrono::system_clock::to_time_t(now);
+
+    // Convert to tm struct for formatting
+    std::tm now_tm = *std::localtime(&now_time_t);
+
+    // Create a stringstream to format the timestamp
+    std::ostringstream oss;
+    oss << "screenshot-" << std::put_time(&now_tm, "%Y-%m-%dT%H:%M:%S") << ".png";
+    img.save(QString::fromStdString(oss.str()));
     img.save("screenshot.png");
     QApplication::clipboard()->setImage(img);
   });
@@ -505,6 +523,10 @@ void Mainframe::closeEvent(QCloseEvent* event) {
 }
 
 void Mainframe::open() {
+  this->open(nullptr);
+}
+
+void Mainframe::open(QString dir) {
   if (readerFuture_.valid()) readerFuture_.wait();
 
   if (mChangesSinceLastSave) {
@@ -520,8 +542,13 @@ void Mainframe::open() {
     }
   }
 
-  QString retValue =
+  QString retValue;
+  if (dir == nullptr) {
+    retValue =
       QFileDialog::getExistingDirectory(this, "Select scan directory", lastDirectory, QFileDialog::ShowDirsOnly);
+  } else {
+    retValue = dir;
+  }
 
   if (!retValue.isNull()) {
     QDir base_dir(retValue);
@@ -1220,3 +1247,7 @@ void Mainframe::updateLabelButtons() {
                                  index - std::floor((double)index / btnsPerRow) * btnsPerRow);
   }
 }
+
+void Mainframe::setLastDirectory(QString lastDirectory) {
+  this->lastDirectory = lastDirectory;
+}

src/widget/Mainframe.h

@@ -25,12 +25,14 @@ class Mainframe : public QMainWindow {
 
  public slots:
   void open();
+  void open(QString dir);
   void save();
   void changeRadius(int radius);
   void changeMode(int mode, bool checked);
 
   void updateFiltering(bool value);
   void labelBtnReleased(QWidget*);
+  void setLastDirectory(QString lastDirectory);
 
  signals:
   void readerStarted();
@@ -53,7 +55,6 @@ class Mainframe : public QMainWindow {
   void closeEvent(QCloseEvent* event);
 
   void readConfig();
-
   void initializeIcons();
 
   void updateMovingStatus(bool isMoving);