+ event to restore/clear action style scheme

src/Gui/Application.cpp

@@ -1647,6 +1647,9 @@ void Application::runApplication(void)
              << QLatin1String(":/stylesheets");
     QDir::setSearchPaths(QString::fromLatin1("qss"), qssPaths);
 
+    // register action style event type
+    ActionStyleEvent::EventType = QEvent::registerEventType(QEvent::User + 1);
+
     // check for OpenGL
     if (!QGLFormat::hasOpenGL()) {
         QMessageBox::critical(0, QObject::tr("No OpenGL"), QObject::tr("This system does not support OpenGL"));
@@ -1795,9 +1798,8 @@ void Application::runApplication(void)
             QTextStream str(&f);
             qApp->setStyleSheet(str.readAll());
 
-            Gui::TaskView::TaskView* taskPanel = Control().taskPanel();
-            if (taskPanel)
-                taskPanel->clearActionStyle();
+            ActionStyleEvent e(ActionStyleEvent::Clear);
+            qApp->sendEvent(&mw, &e);
         }
     }
 

src/Gui/DlgGeneralImp.cpp

@@ -36,8 +36,6 @@
 #include "MainWindow.h"
 #include "PrefWidgets.h"
 #include "Language/Translator.h"
-#include "Control.h"
-#include "TaskView/TaskView.h"
 
 using namespace Gui::Dialog;
 
@@ -165,9 +163,8 @@ void DlgGeneralImp::saveSettings()
                 QTextStream str(&f);
                 qApp->setStyleSheet(str.readAll());
 
-                Gui::TaskView::TaskView* taskPanel = Control().taskPanel();
-                if (taskPanel)
-                    taskPanel->clearActionStyle();
+                ActionStyleEvent e(ActionStyleEvent::Clear);
+                qApp->sendEvent(getMainWindow(), &e);
             }
         }
     }
@@ -175,16 +172,14 @@ void DlgGeneralImp::saveSettings()
     if (sheet.toString().isEmpty()) {
         if (this->tiledBackground->isChecked()) {
             qApp->setStyleSheet(QString());
-            Gui::TaskView::TaskView* taskPanel = Control().taskPanel();
-            if (taskPanel)
-                taskPanel->restoreActionStyle();
+            ActionStyleEvent e(ActionStyleEvent::Restore);
+            qApp->sendEvent(getMainWindow(), &e);
             mdi->setBackground(QPixmap(QLatin1String(":/icons/background.png")));
         }
         else {
             qApp->setStyleSheet(QString());
-            Gui::TaskView::TaskView* taskPanel = Control().taskPanel();
-            if (taskPanel)
-                taskPanel->restoreActionStyle();
+            ActionStyleEvent e(ActionStyleEvent::Restore);
+            qApp->sendEvent(getMainWindow(), &e);
             mdi->setBackground(QBrush(QColor(160,160,160)));
         }
     }

src/Gui/MainWindow.cpp

@@ -97,6 +97,7 @@
 #include "ReportView.h"
 #include "CombiView.h"
 #include "PythonConsole.h"
+#include "TaskView/TaskView.h"
 
 #include "DlgTipOfTheDayImp.h"
 #include "DlgUndoRedo.h"
@@ -1543,6 +1544,19 @@ void MainWindow::customEvent(QEvent* e)
             d->actionTimer->start(5000);
         }
     }
+    else if (e->type() == ActionStyleEvent::EventType) {
+        QList<TaskView::TaskView*> tasks = findChildren<TaskView::TaskView*>();
+        if (static_cast<ActionStyleEvent*>(e)->getType() == ActionStyleEvent::Clear) {
+            for (QList<TaskView::TaskView*>::iterator it = tasks.begin(); it != tasks.end(); ++it) {
+                (*it)->clearActionStyle();
+            }
+        }
+        else {
+            for (QList<TaskView::TaskView*>::iterator it = tasks.begin(); it != tasks.end(); ++it) {
+                (*it)->restoreActionStyle();
+            }
+        }
+    }
 }
 
 // ----------------------------------------------------------
@@ -1624,5 +1638,19 @@ void StatusBarObserver::Log(const char *m)
     QApplication::postEvent(getMainWindow(), ev);
 }
 
+// -------------------------------------------------------------
+
+int ActionStyleEvent::EventType = -1;
+
+ActionStyleEvent::ActionStyleEvent(Style type)
+  : QEvent(QEvent::Type(EventType)), type(type)
+{
+}
+
+ActionStyleEvent::Style ActionStyleEvent::getType() const
+{
+    return type;
+}
+
 
 #include "moc_MainWindow.cpp"

src/Gui/MainWindow.h

@@ -29,6 +29,7 @@
 #include <string>
 #include <vector>
 
+#include <QEvent>
 #include <QMainWindow>
 #include <QMdiArea>
 
@@ -313,6 +314,24 @@ private:
     QString msg, wrn, err;
 };
 
+// -------------------------------------------------------------
+
+/** This is a helper class needed when a style sheet is restored or cleared.
+ * @author Werner Mayer
+ */
+class ActionStyleEvent : public QEvent
+{
+public:
+    static int EventType;
+    enum Style {Restore, Clear};
+
+    ActionStyleEvent(Style type);
+    Style getType() const;
+
+private:
+    Style type;
+};
+
 } // namespace Gui
 
 #endif // GUI_MAINWINDOW_H