global: made every user action set a project "modified" state that will prevent

the main window from closing instantly

app/dialog/sequence/sequence.cpp

@@ -198,7 +198,7 @@ SequenceDialog::SequenceParamCommand::SequenceParamCommand(Sequence* s,
                                                            const AudioParams& audio_params,
                                                            const QString& name,
                                                            QUndoCommand* parent) :
-  QUndoCommand(parent),
+  UndoCommand(parent),
   sequence_(s),
   new_video_params_(video_params),
   new_audio_params_(audio_params),
@@ -209,14 +209,14 @@ SequenceDialog::SequenceParamCommand::SequenceParamCommand(Sequence* s,
 {
 }
 
-void SequenceDialog::SequenceParamCommand::redo()
+void SequenceDialog::SequenceParamCommand::redo_internal()
 {
   sequence_->set_video_params(new_video_params_);
   sequence_->set_audio_params(new_audio_params_);
   sequence_->set_name(new_name_);
 }
 
-void SequenceDialog::SequenceParamCommand::undo()
+void SequenceDialog::SequenceParamCommand::undo_internal()
 {
   sequence_->set_video_params(old_video_params_);
   sequence_->set_audio_params(old_audio_params_);

app/dialog/sequence/sequence.h

@@ -24,9 +24,9 @@
 #include <QComboBox>
 #include <QDialog>
 #include <QSpinBox>
-#include <QUndoCommand>
 
 #include "project/item/sequence/sequence.h"
+#include "undo/undocommand.h"
 
 /**
  * @brief A dialog for editing Sequence parameters
@@ -112,7 +112,7 @@ private:
   /**
    * @brief A QUndoCommand for setting the parameters on a sequence
    */
-  class SequenceParamCommand : public QUndoCommand {
+  class SequenceParamCommand : public UndoCommand {
   public:
     SequenceParamCommand(Sequence* s,
                          const VideoParams& video_params,
@@ -120,8 +120,10 @@ private:
                          const QString& name,
                          QUndoCommand* parent = nullptr);
 
-    virtual void redo() override;
-    virtual void undo() override;
+  protected:
+    virtual void redo_internal() override;
+    virtual void undo_internal() override;
+
   private:
     Sequence* sequence_;