made PanelWidget class more portable and modular

app/widget/panel/panel.cpp

@@ -22,14 +22,19 @@
 
 #include <QPainter>
 
-#include "panel/panelfocusmanager.h"
-
 PanelWidget::PanelWidget(QWidget *parent) :
-  QDockWidget(parent)
+  QDockWidget(parent),
+  border_visible_(false)
 {
   setFocusPolicy(Qt::ClickFocus);
 }
 
+void PanelWidget::SetBorderVisible(bool enabled)
+{
+  border_visible_ = enabled;
+  update();
+}
+
 void PanelWidget::SetTitle(const QString &t)
 {
   title_ = t;
@@ -48,7 +53,7 @@ void PanelWidget::paintEvent(QPaintEvent *event)
   QDockWidget::paintEvent(event);
 
   // Check if this panel (or a child of it) has focus using PanelFocusManager
-  if (olive::panel_focus_manager->CurrentlyFocused() == this) {
+  if (border_visible_) {
 
     // Draw a highlight border if so
     QPainter p(this);

app/widget/panel/panel.h

@@ -41,6 +41,13 @@ public:
    * MainWindow.
    */
   PanelWidget(QWidget* parent);
+
+  /**
+   * @brief Set visibility of panel's highlighted border, mostly used for showing panel focus
+   *
+   * @param enabled
+   */
+  void SetBorderVisible(bool enabled);
 protected:
   /**
    * @brief Set panel's title
@@ -92,6 +99,11 @@ private:
    * @brief Internal subtitle string
    */
   QString subtitle_;
+
+  /**
+   * @brief Internal border visibility value
+   */
+  bool border_visible_;
 };
 
 #endif // PANEL_WIDGET_H