MainFrame: replace the timer with a file watcher.

This will lead to less UI flickering and faster response times.

GUI/EvtMainFrame.cpp

@@ -28,6 +28,7 @@
 #include <Corrade/Containers/Array.h>
 #include <Corrade/Utility/Directory.h>
 #include <Corrade/Utility/FormatStl.h>
+#include <Corrade/Utility/String.h>
 #include <Corrade/Utility/Unicode.h>
 
 #include "EvtMainFrame.h"
@@ -55,6 +56,10 @@ EvtMainFrame::EvtMainFrame(wxWindow* parent): MainFrame(parent) {
                                       "Please avoid using this application while the game is running. Bad Things™ could happen to your data.\n\n"
                                       "DISCLAIMER: The developer of this application cannot be held responsible for data loss or corruption. PLEASE USE AT YOUR OWN RISK!\n\n"
                                       "Last but not least, this application is released under the terms of the GNU General Public Licence version 3. Please see the COPYING file for more details."));
+
+    _watcher.Connect(wxEVT_FSWATCHER, wxFileSystemWatcherEventHandler(EvtMainFrame::fileUpdateEvent), nullptr, this);
+    _watcher.AddTree(wxFileName(Utility::Directory::toNativeSeparators(_saveDirectory), wxPATH_WIN),
+                     wxFSW_EVENT_CREATE|wxFSW_EVENT_DELETE|wxFSW_EVENT_MODIFY|wxFSW_EVENT_RENAME, wxString::Format("Unit??%s.sav", _localSteamId));
 }
 
 EvtMainFrame::~EvtMainFrame() {
@@ -62,6 +67,7 @@ EvtMainFrame::~EvtMainFrame() {
     _installedListView->Disconnect(wxEVT_LIST_ITEM_DESELECTED, wxListEventHandler(EvtMainFrame::installedSelectionEvent), nullptr, this);
     _installedListView->Disconnect(wxEVT_LIST_BEGIN_DRAG, wxListEventHandler(EvtMainFrame::listColumnDragEvent), nullptr, this);
     _installedListView->Disconnect(wxEVT_LIST_COL_BEGIN_DRAG, wxListEventHandler(EvtMainFrame::listColumnDragEvent), nullptr, this);
+    _watcher.Disconnect(wxEVT_FSWATCHER, wxFileSystemWatcherEventHandler(EvtMainFrame::fileUpdateEvent), nullptr, this);
 }
 
 void EvtMainFrame::importEvent(wxCommandEvent&) {
@@ -117,8 +123,6 @@ void EvtMainFrame::importEvent(wxCommandEvent&) {
             *(iter + i) = _localSteamId[i];
         }
     }
-
-    refreshListView();
 }
 
 void EvtMainFrame::moveEvent(wxCommandEvent&) {
@@ -147,8 +151,6 @@ void EvtMainFrame::moveEvent(wxCommandEvent&) {
     if(dest_status != "<Empty>") {
         Utility::Directory::move(dest_file + ".tmp", orig_file);
     }
-
-    refreshListView();
 }
 
 void EvtMainFrame::deleteEvent(wxCommandEvent&) {
@@ -162,8 +164,6 @@ void EvtMainFrame::deleteEvent(wxCommandEvent&) {
     if(Utility::Directory::exists(file)) {
         Utility::Directory::rm(file);
     }
-
-    refreshListView();
 }
 
 void EvtMainFrame::openSaveDirEvent(wxCommandEvent&) {
@@ -178,8 +178,34 @@ void EvtMainFrame::listColumnDragEvent(wxListEvent& event) {
     event.Veto();
 }
 
-void EvtMainFrame::timerEvent(wxTimerEvent&) {
-    refreshListView();
+void EvtMainFrame::fileUpdateEvent(wxFileSystemWatcherEvent& event) {
+    int event_type = event.GetChangeType();
+
+    if(event_type == wxFSW_EVENT_MODIFY && _lastWatcherEventType == wxFSW_EVENT_RENAME) {
+        _lastWatcherEventType = event_type;
+        return;
+    }
+
+    _lastWatcherEventType = event_type;
+
+    std::string event_file =(Utility::Directory::fromNativeSeparators(event.GetNewPath().GetFullName().ToStdString()));
+
+    if(!Utility::String::endsWith(event_file, ".sav")) {
+        return;
+    }
+
+    long slot;
+
+    try {
+        slot = std::stol(std::string(event_file.data() + 4, 2));
+    }
+    catch(const std::invalid_argument&) {
+        return;
+    }
+
+    _installedListView->SetItem(slot, 1, getSlotMassName(slot));
+
+    updateCommandsState();
 }
 
 void EvtMainFrame::getSaveDirectory() {
@@ -228,8 +254,6 @@ void EvtMainFrame::initialiseListView() {
     _installedListView->SetColumnWidth(1, wxLIST_AUTOSIZE_USEHEADER);
 
     refreshListView();
-
-    _refreshTimer.Start(1000);
 }
 
 void EvtMainFrame::refreshListView() {

GUI/EvtMainFrame.h

@@ -19,6 +19,8 @@
 
 #include <string>
 
+#include <wx/fswatcher.h>
+
 #include "MainFrame.h"
 
 class EvtMainFrame: public MainFrame {
@@ -33,7 +35,7 @@ class EvtMainFrame: public MainFrame {
         void openSaveDirEvent(wxCommandEvent&);
         void installedSelectionEvent(wxListEvent&);
         void listColumnDragEvent(wxListEvent&);
-        void timerEvent(wxTimerEvent&);
+        void fileUpdateEvent(wxFileSystemWatcherEvent& event);
 
     private:
         void getSaveDirectory();
@@ -50,6 +52,9 @@ class EvtMainFrame: public MainFrame {
 
         std::string _saveDirectory;
         std::string _localSteamId;
+
+        wxFileSystemWatcher _watcher;
+        int _lastWatcherEventType = 0;
 };
 
 #endif // __EvtMainFrame__

GUI/MainFrame.cpp

@@ -79,7 +79,6 @@ MainFrame::MainFrame( wxWindow* parent, wxWindowID id, const wxString& title, co
 	this->SetSizer( bSizerMain );
 	this->Layout();
 	bSizerMain->Fit( this );
-	_refreshTimer.SetOwner( this, wxID_ANY );
 
 	this->Centre( wxBOTH );
 
@@ -88,7 +87,6 @@ MainFrame::MainFrame( wxWindow* parent, wxWindowID id, const wxString& title, co
 	_moveButton->Connect( wxEVT_COMMAND_BUTTON_CLICKED, wxCommandEventHandler( MainFrame::moveEvent ), NULL, this );
 	_deleteButton->Connect( wxEVT_COMMAND_BUTTON_CLICKED, wxCommandEventHandler( MainFrame::deleteEvent ), NULL, this );
 	_openSaveDirButton->Connect( wxEVT_COMMAND_BUTTON_CLICKED, wxCommandEventHandler( MainFrame::openSaveDirEvent ), NULL, this );
-	this->Connect( wxID_ANY, wxEVT_TIMER, wxTimerEventHandler( MainFrame::timerEvent ) );
 }
 
 MainFrame::~MainFrame()
@@ -98,6 +96,5 @@ MainFrame::~MainFrame()
 	_moveButton->Disconnect( wxEVT_COMMAND_BUTTON_CLICKED, wxCommandEventHandler( MainFrame::moveEvent ), NULL, this );
 	_deleteButton->Disconnect( wxEVT_COMMAND_BUTTON_CLICKED, wxCommandEventHandler( MainFrame::deleteEvent ), NULL, this );
 	_openSaveDirButton->Disconnect( wxEVT_COMMAND_BUTTON_CLICKED, wxCommandEventHandler( MainFrame::openSaveDirEvent ), NULL, this );
-	this->Disconnect( wxID_ANY, wxEVT_TIMER, wxTimerEventHandler( MainFrame::timerEvent ) );
 
 }

GUI/MainFrame.fbp

@@ -603,15 +603,6 @@
                     </object>
                 </object>
             </object>
-            <object class="wxTimer" expanded="1">
-                <property name="enabled">0</property>
-                <property name="id">wxID_ANY</property>
-                <property name="name">_refreshTimer</property>
-                <property name="oneshot">0</property>
-                <property name="period">1000</property>
-                <property name="permission">protected</property>
-                <event name="OnTimer">timerEvent</event>
-            </object>
         </object>
     </object>
 </wxFormBuilder_Project>

GUI/MainFrame.h

@@ -22,7 +22,6 @@
 #include <wx/sizer.h>
 #include <wx/statbox.h>
 #include <wx/stattext.h>
-#include <wx/timer.h>
 #include <wx/frame.h>
 
 ///////////////////////////////////////////////////////////////////////////
@@ -43,14 +42,12 @@ class MainFrame : public wxFrame
 		wxButton* _openSaveDirButton;
 		wxStaticText* _riskLabel;
 		wxStaticText* _aboutText;
-		wxTimer _refreshTimer;
 
 		// Virtual event handlers, overide them in your derived class
 		virtual void importEvent( wxCommandEvent& event ) { event.Skip(); }
 		virtual void moveEvent( wxCommandEvent& event ) { event.Skip(); }
 		virtual void deleteEvent( wxCommandEvent& event ) { event.Skip(); }
 		virtual void openSaveDirEvent( wxCommandEvent& event ) { event.Skip(); }
-		virtual void timerEvent( wxTimerEvent& event ) { event.Skip(); }
 
 
 	public: