Prevent issuing a print command before the previous one is finished

Fixes: lp:1765965
* https://bugs.launchpad.net/kicad/+bug/1765965

eeschema/dialogs/dialog_print_using_printer.cpp

@@ -38,7 +38,7 @@
 
 #include <invoke_sch_dialog.h>
 #include <dialog_print_using_printer_base.h>
-
+#include <enabler.h>
 
 
 /**
@@ -300,6 +300,10 @@ void DIALOG_PRINT_USING_PRINTER::OnPrintButtonClick( wxCommandEvent& event )
     wxPrinter printer( &printDialogData );
     SCH_PRINTOUT printout( parent, _( "Print Schematic" ) );
 
+    // Disable 'Print' button to prevent issuing another print
+    // command before the previous one is finished (causes problems on Windows)
+    ENABLER printBtnDisable( *m_buttonPrint, false );
+
     if( !printer.Print( this, &printout, true ) )
     {
         if( wxPrinter::GetLastError() == wxPRINTER_ERROR )

gerbview/dialogs/dialog_print_using_printer.cpp

@@ -37,6 +37,8 @@
 #include <gerber_file_image.h>
 #include <gerber_file_image_list.h>
 
+#include <enabler.h>
+
 ///@{
 /// \ingroup config
 
@@ -403,6 +405,10 @@ void DIALOG_PRINT_USING_PRINTER::OnPrintButtonClick( wxCommandEvent& event )
     wxString title = _( "Print" );
     BOARD_PRINTOUT_CONTROLLER printout( s_Parameters, m_Parent, title );
 
+    // Disable 'Print' button to prevent issuing another print
+    // command before the previous one is finished (causes problems on Windows)
+    ENABLER printBtnDisable( *m_buttonPrint, false );
+
     if( !printer.Print( this, &printout, true ) )
     {
         if( wxPrinter::GetLastError() == wxPRINTER_ERROR )

include/enabler.h

@@ -0,0 +1,54 @@
+/*
+ * Copyright (C) 2018 CERN
+ * Author: Maciej Suminski <maciej.suminski@cern.ch>
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or (at your
+ * option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef ENABLER_H
+#define ENABLER_H
+
+#include <wx/window.h>
+
+/**
+ * Simple class to automatically enable/disable widgets.
+ *
+ * As long as an ENABLER object exists, the handled widget will be kept in the requested state.
+ */
+class ENABLER
+{
+public:
+    /**
+     * Constructor.
+     *
+     * @param aObject is the object to be temporarily enabled or disabled.
+     * @param aState is the requested temporary state (true for enabled, false for disabled).
+     */
+    ENABLER( wxWindow& aObject, bool aState )
+        : m_object( aObject ), m_state( aState )
+    {
+        m_object.Enable( m_state );
+    }
+
+    ~ENABLER()
+    {
+        m_object.Enable( !m_state );
+    }
+
+private:
+    wxWindow& m_object;
+    bool m_state;
+};
+
+#endif /* ENABLER_H */

pcbnew/dialogs/dialog_print_for_modedit.cpp

@@ -35,6 +35,7 @@
 
 #include <dialog_print_for_modedit_base.h>
 #include <printout_controler.h>
+#include <enabler.h>
 
 static double s_scaleList[] =
 { 0, 0.5, 0.7, 1.0, 1.4, 2.0, 3.0, 4.0, 8.0, 16.0 };
@@ -234,6 +235,10 @@ void DIALOG_PRINT_FOR_MODEDIT::OnPrintButtonClick( wxCommandEvent& event )
 
     BOARD_PRINTOUT_CONTROLLER printout( s_Parameters, m_parent, _( "Print Footprint" ) );
 
+    // Disable 'Print' button to prevent issuing another print
+    // command before the previous one is finished (causes problems on Windows)
+    ENABLER printBtnDisable( *m_buttonPrint, false );
+
     if( !printer.Print( this, &printout, true ) )
     {
         if( wxPrinter::GetLastError() == wxPRINTER_ERROR )

pcbnew/dialogs/dialog_print_using_printer.cpp

@@ -39,6 +39,7 @@
 #include <class_board.h>
 
 #include <dialog_print_using_printer_base.h>
+#include <enabler.h>
 
 
 #define PEN_WIDTH_MAX_VALUE ( KiROUND( 5 * IU_PER_MM ) )
@@ -494,6 +495,9 @@ void DIALOG_PRINT_USING_PRINTER::OnPrintButtonClick( wxCommandEvent& event )
     wxString  title = _( "Print" );
     BOARD_PRINTOUT_CONTROLLER printout( s_Parameters, m_parent, title );
 
+    // Disable 'Print' button to prevent issuing another print
+    // command before the previous one is finished (causes problems on Windows)
+    ENABLER printBtnDisable( *m_buttonPrint, false );
 
     if( !printer.Print( this, &printout, true ) )
     {