preferences: allow users to set the default still image length

app/dialog/preferences/tabs/preferencesgeneraltab.cpp

@@ -74,6 +74,15 @@ PreferencesGeneralTab::PreferencesGeneralTab()
 
   row++;
 
+  general_layout->addWidget(new QLabel(tr("Default Still Image Length:")), row, 0);
+
+  default_still_length_ = new FloatSlider();
+  default_still_length_->SetMinimum(0.1);
+  default_still_length_->SetValue(Config::Current()["DefaultStillLength"].value<rational>().toDouble());
+  general_layout->addWidget(default_still_length_);
+
+  row++;
+
   general_layout->addWidget(new QLabel(tr("Default Sequence Settings:")), row, 0);
 
   // General -> Default Sequence Settings
@@ -93,6 +102,8 @@ void PreferencesGeneralTab::Accept()
   Config::Current()["DefaultSequenceAudioLayout"] = QVariant::fromValue(default_sequence_.audio_params().channel_layout());
 
   Config::Current()["Autoscroll"] = autoscroll_method_->currentData();
+
+  Config::Current()["DefaultStillLength"] = QVariant::fromValue(rational::fromDouble(default_still_length_->GetValue()));
 }
 
 void PreferencesGeneralTab::edit_default_sequence_settings()

app/dialog/preferences/tabs/preferencesgeneraltab.h

@@ -6,6 +6,7 @@
 
 #include "preferencestab.h"
 #include "project/item/sequence/sequence.h"
+#include "widget/slider/floatslider.h"
 
 class PreferencesGeneralTab : public PreferencesTab
 {
@@ -26,12 +27,13 @@ private:
 
   QComboBox* autoscroll_method_;
 
+  FloatSlider* default_still_length_;
+
   /**
    * @brief A sequence we can feed to a SequenceDialog to change the defaults
    */
   Sequence default_sequence_;
 
-
 };
 
 #endif // PREFERENCESGENERALTAB_H