Add support for dark theme in plugin icons

Action plugin authors can specify alternative icon path for dark theme.
If it's not specified then standard icon will be used for both light and
dark themes. If neither icon is specified then the default puzzle piece
icon is used.

Fixes #7984

common/eda_base_frame.cpp

@@ -454,15 +454,7 @@ void EDA_BASE_FRAME::CommonSettingsChanged( bool aEnvVarsChanged, bool aTextVars
 
     if( GetBitmapStore()->ThemeChanged() )
     {
-        ClearScaledBitmapCache();
-
-        wxAuiPaneInfoArray panes = m_auimgr.GetAllPanes();
-
-        for( size_t i = 0; i < panes.GetCount(); ++i )
-        {
-            if( ACTION_TOOLBAR* toolbar = dynamic_cast<ACTION_TOOLBAR*>( panes[i].window ) )
-                toolbar->RefreshBitmaps();
-        }
+        ThemeChanged();
     }
 
     if( GetMenuBar() )
@@ -474,6 +466,20 @@ void EDA_BASE_FRAME::CommonSettingsChanged( bool aEnvVarsChanged, bool aTextVars
 }
 
 
+void EDA_BASE_FRAME::ThemeChanged()
+{
+    ClearScaledBitmapCache();
+
+    wxAuiPaneInfoArray panes = m_auimgr.GetAllPanes();
+
+    for( size_t i = 0; i < panes.GetCount(); ++i )
+    {
+        if( ACTION_TOOLBAR* toolbar = dynamic_cast<ACTION_TOOLBAR*>( panes[i].window ) )
+            toolbar->RefreshBitmaps();
+    }
+}
+
+
 void EDA_BASE_FRAME::LoadWindowState( const wxString& aFileName )
 {
     if( !Pgm().GetCommonSettings()->m_Session.remember_open_files )

include/eda_base_frame.h

@@ -480,6 +480,11 @@ public:
      */
     void CommonSettingsChanged( bool aEnvVarsChanged, bool aTextVarsChanged ) override;
 
+    /**
+     * Process light/dark theme change.
+     */
+    virtual void ThemeChanged();
+
     /**
      * Notification event that the project has changed.
      */

pcbnew/action_plugin.cpp

@@ -28,6 +28,8 @@
  */
 
 #include "action_plugin.h"
+#include "bitmaps.h"
+#include "bitmap_store.h"
 
 
 ACTION_PLUGIN::~ACTION_PLUGIN()
@@ -156,16 +158,17 @@ void ACTION_PLUGINS::register_action( ACTION_PLUGIN* aAction )
     }
 
     // Load icon if supplied
-    if( !aAction->GetIconFileName().IsEmpty() )
+    wxString icon_file_name = aAction->GetIconFileName( GetBitmapStore()->IsDarkTheme() );
+    if( !icon_file_name.IsEmpty() )
     {
         {
             wxLogNull eat_errors;
-            aAction->iconBitmap.LoadFile( aAction->GetIconFileName() , wxBITMAP_TYPE_PNG );
+            aAction->iconBitmap.LoadFile( icon_file_name, wxBITMAP_TYPE_PNG );
         }
 
         if ( !aAction->iconBitmap.IsOk() )
         {
-            wxLogVerbose( "Failed to load icon " + aAction->GetIconFileName() + " for action plugin " );
+            wxLogVerbose( "Failed to load icon " + icon_file_name + " for action plugin " );
         }
     }
 

pcbnew/action_plugin.h

@@ -83,9 +83,10 @@ public:
 
     /**
      * Function GetIconFileName
+     * @param dark true if requesting dark theme icon
      * @return a path to icon for the action plugin button
      */
-    virtual wxString GetIconFileName() = 0;
+    virtual wxString GetIconFileName( bool dark ) = 0;
 
     /**
      * Function GetPluginPath

pcbnew/pcb_edit_frame.cpp

@@ -1688,6 +1688,14 @@ void PCB_EDIT_FRAME::CommonSettingsChanged( bool aEnvVarsChanged, bool aTextVars
 }
 
 
+void PCB_EDIT_FRAME::ThemeChanged()
+{
+    PCB_BASE_EDIT_FRAME::ThemeChanged();
+
+    PythonPluginsReload();
+}
+
+
 void PCB_EDIT_FRAME::ProjectChanged()
 {
     PythonSyncProjectName();

pcbnew/pcb_edit_frame.h

@@ -824,6 +824,11 @@ public:
      */
     void CommonSettingsChanged( bool aEnvVarsChanged, bool aTextVarsChanged ) override;
 
+    /**
+     * Called when light/dark theme is changed.
+     */
+    void ThemeChanged() override;
+
     void ProjectChanged() override;
 
     wxString GetCurrentFileName() const override;

pcbnew/swig/pcbnew_action_plugins.cpp

@@ -138,11 +138,17 @@ bool PYTHON_ACTION_PLUGIN::GetShowToolbarButton()
 }
 
 
-wxString PYTHON_ACTION_PLUGIN::GetIconFileName()
+wxString PYTHON_ACTION_PLUGIN::GetIconFileName( bool dark )
 {
     PyLOCK lock;
 
-    return CallRetStrMethod( "GetIconFileName" );
+    PyObject* arglist = Py_BuildValue( "(i)", (int) dark );
+
+    wxString result = CallRetStrMethod( "GetIconFileName", arglist );
+
+    Py_DECREF( arglist );
+
+    return result;
 }
 
 

pcbnew/swig/pcbnew_action_plugins.h

@@ -52,7 +52,7 @@ public:
     wxString    GetName() override;
     wxString    GetDescription() override;
     bool        GetShowToolbarButton() override;
-    wxString    GetIconFileName() override;
+    wxString    GetIconFileName( bool dark ) override;
     wxString    GetPluginPath() override;
     void        Run() override;
     void*       GetObject() override;

scripting/kicadplugins.i

@@ -658,6 +658,7 @@ class ActionPlugin(KiCadPlugin, object):
     def __init__( self ):
         KiCadPlugin.__init__( self )
         self.icon_file_name = ""
+        self.dark_icon_file_name = ""
         self.show_toolbar_button = False
         self.defaults()
 
@@ -678,8 +679,11 @@ class ActionPlugin(KiCadPlugin, object):
     def GetShowToolbarButton( self ):
         return self.show_toolbar_button
 
-    def GetIconFileName( self ):
-        return self.icon_file_name
+    def GetIconFileName( self, dark ):
+        if dark and self.dark_icon_file_name:
+            return self.dark_icon_file_name
+        else:
+            return self.icon_file_name
 
     def Run(self):
         return