Implement Alt Click to default on sliders

The following sliders now have Alt Click functionality:
 - Nodes (What it's initialy set too or 0 if not)
 - Export Dialog Dimensions~ (Defaults to Sequence width/height)
 - Export Compression Settings~
    - Advanced (0)
 - Speed/Duration
    - Speed (100%)
    - Duration (clip length)
 - Stream Properties Image sequence
    - Start Index (1)
    - End Index (sequence length)

Sliders with no default value set ignore an Alt
Click.

Added SliderBase::SetDefaultValue() which sets the
default value of a slider.

Added ValueReset() to SliderBase signals which is
called if a slider is Alt Clicked on. Only updates
if default_value_ is not Null.

app/widget/nodeparamview/nodeparamviewwidgetbridge.cpp

@@ -66,6 +66,7 @@ const QList<QWidget *> &NodeParamViewWidgetBridge::widgets() const
 
 void NodeParamViewWidgetBridge::CreateWidgets()
 {
+
   if (input_->IsArray()) {
 
     NodeParamViewArrayWidget* w = new NodeParamViewArrayWidget(static_cast<NodeInputArray*>(input_));
@@ -91,6 +92,11 @@ void NodeParamViewWidgetBridge::CreateWidgets()
     case NodeParam::kInt:
     {
       IntegerSlider* slider = new IntegerSlider();
+      if (!input_->get_standard_value().isNull()) {
+        slider->SetDefaultValue(input_->get_standard_value());
+      } else {
+        slider->SetDefaultValue(0);
+      }
       widgets_.append(slider);
       connect(slider, &IntegerSlider::ValueChanged, this, &NodeParamViewWidgetBridge::WidgetCallback);
       break;
@@ -363,6 +369,11 @@ void NodeParamViewWidgetBridge::CreateSliders(int count)
 {
   for (int i=0;i<count;i++) {
     FloatSlider* fs = new FloatSlider();
+    if (!input_->get_standard_value().isNull()) {
+      fs->SetDefaultValue(input_->get_split_standard_value().at(i));
+    } else {
+      fs->SetDefaultValue(0.0f);
+    }
     widgets_.append(fs);
     connect(fs, &FloatSlider::ValueChanged, this, &NodeParamViewWidgetBridge::WidgetCallback);
   }

app/widget/slider/sliderbase.cpp

@@ -23,6 +23,7 @@
 #include <QDebug>
 #include <QEvent>
 #include <QMessageBox>
+#include <QGuiApplication>
 
 OLIVE_NAMESPACE_ENTER
 
@@ -49,6 +50,7 @@ SliderBase::SliderBase(Mode mode, QWidget *parent) :
   connect(label_, SIGNAL(dragged(int)), this, SLOT(LabelDragged(int)));
   connect(label_, SIGNAL(drag_stop()), this, SLOT(LabelClicked()));
   connect(label_, SIGNAL(focused()), this, SLOT(LabelClicked()));
+  connect(label_, SIGNAL(ResetResult()), this, SLOT(ValueReset()));
   connect(editor_, SIGNAL(Confirmed()), this, SLOT(LineEditConfirmed()));
   connect(editor_, SIGNAL(Cancelled()), this, SLOT(LineEditCancelled()));
 
@@ -137,6 +139,11 @@ void SliderBase::SetValue(const QVariant &v)
   UpdateLabel(value_);
 }
 
+void SliderBase::SetDefaultValue(const QVariant &v) 
+{ 
+  default_value_ = ClampValue(v);
+}
+
 void SliderBase::SetMinimumInternal(const QVariant &v)
 {
   min_value_ = v;
@@ -241,7 +248,6 @@ void SliderBase::LabelClicked()
     emit ValueChanged(value_);
   } else {
     // This was a simple click
-
     // Load label's text into editor
     editor_->setText(ValueToString(value_));
 
@@ -327,4 +333,12 @@ void SliderBase::LineEditCancelled()
   label_->blockSignals(false);
 }
 
+void SliderBase::ValueReset() 
+{
+  if (!default_value_.isNull()) {
+    SetValue(default_value_);
+    emit ValueChanged(value_);
+  }
+}
+
 OLIVE_NAMESPACE_EXIT

app/widget/slider/sliderbase.h

@@ -45,6 +45,8 @@ public:
 
   void SetAlignment(Qt::Alignment alignment);
 
+  void SetDefaultValue(const QVariant& v);
+
   bool IsTristate() const;
   void SetTristate();
 
@@ -89,6 +91,7 @@ private:
   FocusableLineEdit* editor_;
 
   QVariant value_;
+  QVariant default_value_;
 
   bool has_min_;
   QVariant min_value_;
@@ -120,6 +123,8 @@ private slots:
   void LineEditConfirmed();
 
   void LineEditCancelled();
+
+  void ValueReset();
 };
 
 OLIVE_NAMESPACE_EXIT

app/widget/slider/sliderlabel.cpp

@@ -55,49 +55,60 @@ SliderLabel::SliderLabel(QWidget *parent) :
 
 void SliderLabel::mousePressEvent(QMouseEvent *)
 {
-  emit drag_start();
+  if (QGuiApplication::keyboardModifiers().testFlag(Qt::AltModifier)) {
+    emit ResetResult();
+  }else {
+    emit drag_start();
 
 #if defined(Q_OS_MAC)
-  CGAssociateMouseAndMouseCursorPosition(false);
-  CGDisplayHideCursor(kCGDirectMainDisplay);
-  CGGetLastMouseDelta(nullptr, nullptr);
+    CGAssociateMouseAndMouseCursorPosition(false);
+    CGDisplayHideCursor(kCGDirectMainDisplay);
+    CGGetLastMouseDelta(nullptr, nullptr);
 #else
-  drag_start_ = QCursor::pos();
+    drag_start_ = QCursor::pos();
 
-  static_cast<QGuiApplication*>(QApplication::instance())->setOverrideCursor(Qt::BlankCursor);
+    static_cast<QGuiApplication*>(QApplication::instance())->setOverrideCursor(Qt::BlankCursor);
 #endif
+  }
 }
 
 void SliderLabel::mouseMoveEvent(QMouseEvent *)
 {
-  int32_t x_mvmt, y_mvmt;
+  if (QGuiApplication::keyboardModifiers().testFlag(Qt::AltModifier)) {
+      // do nothing
+  }else {
+    int32_t x_mvmt, y_mvmt;
 
-  // Keep cursor in the same position
+    // Keep cursor in the same position
 #if defined(Q_OS_MAC)
-  CGGetLastMouseDelta(&x_mvmt, &y_mvmt);
+    CGGetLastMouseDelta(&x_mvmt, &y_mvmt);
 #else
-  QPoint current_pos = QCursor::pos();
+    QPoint current_pos = QCursor::pos();
 
-  x_mvmt = current_pos.x() - drag_start_.x();
-  y_mvmt = drag_start_.y() - current_pos.y();
+    x_mvmt = current_pos.x() - drag_start_.x();
+    y_mvmt = drag_start_.y() - current_pos.y();
 
-  QCursor::setPos(drag_start_);
+    QCursor::setPos(drag_start_);
 #endif
 
-  emit dragged(x_mvmt + y_mvmt);
+    emit dragged(x_mvmt + y_mvmt);
+  }
 }
 
 void SliderLabel::mouseReleaseEvent(QMouseEvent *)
 {
+  if (QGuiApplication::keyboardModifiers().testFlag(Qt::AltModifier)) {
+    //do nothing 
+  } else {
+    // Emit a clicked signal
+    emit drag_stop();
+  }
 #if defined(Q_OS_MAC)
   CGAssociateMouseAndMouseCursorPosition(true);
   CGDisplayShowCursor(kCGDirectMainDisplay);
 #else
   static_cast<QGuiApplication*>(QApplication::instance())->restoreOverrideCursor();
 #endif
-
-  // Emit a clicked signal
-  emit drag_stop();
 }
 
 void SliderLabel::focusInEvent(QFocusEvent *event)

app/widget/slider/sliderlabel.h

@@ -51,6 +51,8 @@ signals:
 
   void focused();
 
+  void ResetResult();
+
 private:
   QPoint drag_start_;