Don't bail out of loading when one library couldn't be found.

Also includes some cleanup to the error dialog (removing
sunken border, fixing OK button, etc.)

Fixes: lp:1749572
* https://bugs.launchpad.net/kicad/+bug/1749572

common/dialogs/dialog_display_info_HTML_base.cpp

@@ -1,5 +1,5 @@
 ///////////////////////////////////////////////////////////////////////////
-// C++ code generated with wxFormBuilder (version Jan  2 2018)
+// C++ code generated with wxFormBuilder (version Dec 30 2017)
 // http://www.wxformbuilder.org/
 //
 // PLEASE DO *NOT* EDIT THIS FILE!
@@ -16,12 +16,12 @@ DIALOG_DISPLAY_HTML_TEXT_BASE::DIALOG_DISPLAY_HTML_TEXT_BASE( wxWindow* parent,
 	wxBoxSizer* bMainSizer;
 	bMainSizer = new wxBoxSizer( wxVERTICAL );
 	
-	m_htmlWindow = new wxHtmlWindow( this, wxID_ANY, wxDefaultPosition, wxDefaultSize, wxHW_SCROLLBAR_AUTO|wxSUNKEN_BORDER );
+	m_htmlWindow = new wxHtmlWindow( this, wxID_ANY, wxDefaultPosition, wxDefaultSize, wxHW_SCROLLBAR_AUTO );
 	m_htmlWindow->SetMinSize( wxSize( 400,250 ) );
 	
-	bMainSizer->Add( m_htmlWindow, 1, wxEXPAND, 5 );
+	bMainSizer->Add( m_htmlWindow, 1, wxALL|wxEXPAND, 5 );
 	
-	m_buttonClose = new wxButton( this, wxID_CANCEL, _("Close"), wxDefaultPosition, wxDefaultSize, wxBU_EXACTFIT );
+	m_buttonClose = new wxButton( this, wxID_CANCEL, _("OK"), wxDefaultPosition, wxDefaultSize, 0 );
 	m_buttonClose->SetDefault(); 
 	bMainSizer->Add( m_buttonClose, 0, wxALIGN_RIGHT|wxALL, 5 );
 	

common/dialogs/dialog_display_info_HTML_base.fbp

@@ -95,7 +95,7 @@
                 <property name="permission">none</property>
                 <object class="sizeritem" expanded="1">
                     <property name="border">5</property>
-                    <property name="flag">wxEXPAND</property>
+                    <property name="flag">wxALL|wxEXPAND</property>
                     <property name="proportion">1</property>
                     <object class="wxHtmlWindow" expanded="1">
                         <property name="BottomDockable">1</property>
@@ -148,7 +148,7 @@
                         <property name="tooltip"></property>
                         <property name="window_extra_style"></property>
                         <property name="window_name"></property>
-                        <property name="window_style">wxSUNKEN_BORDER</property>
+                        <property name="window_style"></property>
                         <event name="OnChar"></event>
                         <event name="OnEnterWindow"></event>
                         <event name="OnEraseBackground"></event>
@@ -210,7 +210,7 @@
                         <property name="gripper">0</property>
                         <property name="hidden">0</property>
                         <property name="id">wxID_CANCEL</property>
-                        <property name="label">Close</property>
+                        <property name="label">OK</property>
                         <property name="max_size"></property>
                         <property name="maximize_button">0</property>
                         <property name="maximum_size"></property>
@@ -228,7 +228,7 @@
                         <property name="resize">Resizable</property>
                         <property name="show">1</property>
                         <property name="size"></property>
-                        <property name="style">wxBU_EXACTFIT</property>
+                        <property name="style"></property>
                         <property name="subclass"></property>
                         <property name="toolbar_pane">0</property>
                         <property name="tooltip"></property>

common/dialogs/dialog_display_info_HTML_base.h

@@ -1,5 +1,5 @@
 ///////////////////////////////////////////////////////////////////////////
-// C++ code generated with wxFormBuilder (version Jan  2 2018)
+// C++ code generated with wxFormBuilder (version Dec 30 2017)
 // http://www.wxformbuilder.org/
 //
 // PLEASE DO *NOT* EDIT THIS FILE!

common/html_messagebox.cpp

@@ -35,7 +35,7 @@ HTML_MESSAGE_BOX::HTML_MESSAGE_BOX( wxWindow* parent, const wxString& aTitle) :
     ListClear();
 
     // Gives a default logical size (the actual size depends on the display definition)
-    SetSizeInDU( 240, 150 );
+    SetSizeInDU( 320, 120 );
 
     Center();
 }

pcbnew/kicad_plugin.cpp

@@ -148,6 +148,12 @@ class FP_CACHE
     wxDateTime      m_mod_time;     /// Footprint library path modified time stamp.
     MODULE_MAP      m_modules;      /// Map of footprint file name per MODULE*.
 
+    bool m_represents_non_existant_dir;  // Indicates this cache represents a directory
+                                         // which does not exist. This forces
+                                         // GetLibModificationTime() to return 0 (at least
+                                         // until the directory is found, at which point it
+                                         // will return Now).
+
 public:
     FP_CACHE( PCB_IO* aOwner, const wxString& aLibraryPath );
 
@@ -204,13 +210,19 @@ FP_CACHE::FP_CACHE( PCB_IO* aOwner, const wxString& aLibraryPath )
 {
     m_owner = aOwner;
     m_lib_path.SetPath( aLibraryPath );
+    m_represents_non_existant_dir = false;
 }
 
 
 wxDateTime FP_CACHE::GetLibModificationTime() const
 {
     if( !m_lib_path.DirExists() )
-        return wxDateTime::Now();
+    {
+        if( m_represents_non_existant_dir )
+            return wxDateTime( 0.0 );
+        else
+            return wxDateTime::Now();
+    }
 
     return m_lib_path.GetModificationTime();
 }
@@ -280,10 +292,14 @@ void FP_CACHE::Save()
 
 void FP_CACHE::Load()
 {
+    m_represents_non_existant_dir = false;
+
     wxDir dir( m_lib_path.GetPath() );
 
     if( !dir.IsOpened() )
     {
+        m_represents_non_existant_dir = true;
+
         wxString msg = wxString::Format(
                 _( "Footprint library path \"%s\" does not exist" ),
                 GetChars( m_lib_path.GetPath() )
@@ -1958,18 +1974,10 @@ void PCB_IO::FootprintEnumerate( wxArrayString&    aFootprintNames,
     LOCALE_IO     toggle;     // toggles on, then off, the C locale.
     wxDir         dir( aLibraryPath );
 
-    if( !dir.IsOpened() )
-    {
-        THROW_IO_ERROR( wxString::Format( _( "footprint library path \"%s\" does not exist" ),
-                                          GetChars( aLibraryPath ) ) );
-    }
-
     init( aProperties );
 
     wxString errorMsg;
 
-    // Some of the files may have been parsed correctly so we want to add the valid files to
-    // the library.
     try
     {
         cacheLib( aLibraryPath );
@@ -1979,6 +1987,9 @@ void PCB_IO::FootprintEnumerate( wxArrayString&    aFootprintNames,
         errorMsg = ioe.What();
     }
 
+    // Some of the files may have been parsed correctly so we want to add the valid files to
+    // the library.
+
     const MODULE_MAP& mods = m_cache->GetModules();
 
     for( MODULE_CITER it = mods.begin();  it != mods.end();  ++it )

pcbnew/load_select_footprint.cpp

@@ -390,19 +390,14 @@ wxString PCB_BASE_FRAME::SelectFootprint( EDA_DRAW_FRAME* aWindow,
     MList.ReadFootprintFiles( aTable, !aLibraryName ? NULL : &aLibraryName );
 
     if( MList.GetErrorCount() )
-    {
         MList.DisplayErrors( this );
-        return wxEmptyString;
-    }
 
     if( MList.GetCount() == 0 )
     {
         wxString tmp;
 
         for( unsigned i = 0;  i < libraries.GetCount();  i++ )
-        {
             tmp += libraries[i] + wxT( "\n" );
-        }
 
         msg.Printf( _( "No footprints could be read from library file(s):\n\n%s\nin any of "
                        "the library search paths.  Verify your system is configured properly "