fix file watcher

Readme.md

@@ -27,8 +27,9 @@ Usage: TileViewer [-n] [-i <str>] [-o <str>] [-p <str>]
   -n, --nogui         decode tiles without gui
   -i, --inpath=<str>  tile file inpath
   -o, --outpath=<str> outpath for decoded file
-  -p, --plugin=<str>  use lua plugin to decode
-  --plugincfg=<str>   use plugincfg, default is xxx.json with xxx plugin
+  -p, --plugin=<str>  plugin path to decode
+  --plugincfg=<str>   plugin config path (default pluginpath.json)
+  --pluginparam=<str> set the plugincfg values, for example {'name1': value1, 'name2': value2}
   --start=<num>       tile start offset
   --size=<num>        whole tile size
   --nrow=<num>        how many tiles in a row

src/core_solver.cpp

@@ -187,25 +187,20 @@ TileSolver::TileSolver()
 size_t TileSolver::PrepareTilebuf()
 {
     size_t start = m_tilecfg.start;
-    size_t datasize = m_tilecfg.size - start;
+    size_t datasize = m_tilecfg.size;
     size_t nbytes = calc_tile_nbytes(&m_tilecfg.fmt);
 
     // check datasize avilable
-    if(!datasize) 
+    if(m_filebuf.GetDataLen() - start < 0)
     {
-        if(m_filebuf.GetDataLen() - start < 0)
-        {
-            wxLogError("[TileSolver::Decode] start(%u) is bigger than file (%zu)", 
-                        start, m_filebuf.GetDataLen());
-            return 0;
-        }
-        datasize = m_filebuf.GetDataLen() - start;
-    }
-    else 
-    {
-        datasize = wxMin<size_t, size_t>(datasize, m_filebuf.GetDataLen());
+        wxLogError("[TileSolver::Decode] start(%u) is bigger than file (%zu)", 
+                    start, m_filebuf.GetDataLen());
+        return 0;
     }
 
+    if(!datasize) datasize = m_filebuf.GetDataLen() - start;
+    else datasize = wxMin<size_t, size_t>(datasize, m_filebuf.GetDataLen() - start);
+
     // prepares tiles
     int ntile = datasize / nbytes;
     if(ntile <= 0) ntile = 1; // prevent data less than nbytes

src/ui_top.cpp

@@ -32,7 +32,7 @@ TopFrame::TopFrame() :
     wxGetApp().SearchPlugins(pluginDir); // find decode plugins
 
     // file watcher
-    if(wxFileExists(pluginDir))
+    if(wxDirExists(pluginDir))
     {
         auto *filewatcher = new wxFileSystemWatcher();
         filewatcher->SetOwner(this);