Styles for custom widgets now load

src/gui/widgets/timeline-widget.cpp

@@ -41,7 +41,7 @@ TimelineWidget::TimelineWidget() :
   {
     rowHeaderLayout.set_size_request(100, 100);
 
-    body = new TimelineBody(horizontalAdjustment, verticalAdjustment);
+    body = new TimelineBody(this);
  
     verticalAdjustment.signal_value_changed().connect(
       sigc::mem_fun(this, &TimelineWidget::on_scroll) );

src/gui/widgets/timeline/timeline-body.cpp

@@ -23,6 +23,7 @@
 #include <cairomm-1.0/cairomm/cairomm.h>
 
 #include "timeline-body.hpp"
+#include "../timeline-widget.hpp"
 
 using namespace Gtk;
 using namespace std;
@@ -33,13 +34,26 @@ namespace gui {
 namespace widgets {
 namespace timeline {
 
-TimelineBody::TimelineBody(lumiera::gui::widgets::TimelineWidget &timeline_widget) :
+TimelineBody::TimelineBody(lumiera::gui::widgets::TimelineWidget *timeline_widget) :
+    Glib::ObjectBase("TimelineBody"),
     timelineWidget(timeline_widget)
   {
-    timelineWidget.horizontalAdjustment.signal_value_changed().connect(
+    g_assert(timelineWidget != NULL);
+        
+    // Connect up some events  
+    timelineWidget->horizontalAdjustment.signal_value_changed().connect(
       sigc::mem_fun(this, &TimelineBody::on_scroll) );
-    timelineWidget.verticalAdjustment.signal_value_changed().connect(
+    timelineWidget->verticalAdjustment.signal_value_changed().connect(
       sigc::mem_fun(this, &TimelineBody::on_scroll) );
+    
+    // Install style properties
+    gtk_widget_class_install_style_property(
+      GTK_WIDGET_CLASS(G_OBJECT_GET_CLASS(gobj())), 
+      g_param_spec_boxed("track_background",
+        "Track Background",
+        "The background colour of timeline tracks",
+        GDK_TYPE_COLOR, G_PARAM_READABLE));
+
   }
 
 void
@@ -53,32 +67,64 @@ TimelineBody::on_expose_event(GdkEventExpose* event)
   {
     // This is where we draw on the window
     Glib::RefPtr<Gdk::Window> window = get_window();
-    if(window)
+    if(!window)
+      return false;
+      
+    read_styles();
+      
+
+    Gtk::Allocation allocation = get_allocation();
+    const int width = allocation.get_width();
+    const int height = allocation.get_height();
+
+    Cairo::RefPtr<Cairo::Context> cairo = window->create_cairo_context();
+    cairo->set_line_width(10.0);
+    
+    cairo->rectangle(50, 50, 100, 100);
+    gdk_cairo_set_source_color(cairo->cobj(), &track_background);
+
+    cairo->fill_preserve();
+
+
+    cairo->translate(
+      -timelineWidget->horizontalAdjustment.get_value(),
+      -timelineWidget->verticalAdjustment.get_value());
+    cairo->save();
+
+    vector<timeline::Track*>::iterator i;
+    for(i = timelineWidget->tracks.begin();
+      i != timelineWidget->tracks.end(); i++)
     {
-      Gtk::Allocation allocation = get_allocation();
+      timeline::Track *track = *i;
-      const int width = allocation.get_width();
+      g_assert(track != NULL);    
-      const int height = allocation.get_height();
+      track->draw_track(cairo);
-
-      Cairo::RefPtr<Cairo::Context> cr = window->create_cairo_context();
-      cr->set_line_width(10.0);
-
-      cr->translate(-horizontalAdjustment.get_value(), -verticalAdjustment.get_value());
-      cr->save();
-
-      vector<timeline::Track*>::iterator i;
-      for(i = tracks.begin(); i != tracks.end(); i++)
-      {
-        timeline::Track *track = *i;
-        g_assert(track != NULL);    
-        track->draw_track();
-      }
-
-      cr->restore();
     }
 
+    cairo->restore();
+
     return true;
 
   }
+  
+void
+TimelineBody::read_styles()
+{
+  GdkColor *colour;
+
+  gtk_widget_style_get(Widget::gobj(), "track_background", &colour, NULL);
+
+  // Did the color load successfully?
+  if(colour != NULL)
+    track_background = *colour;
+  else
+  {
+    g_warning("track_background style value failed to load");
+    track_background.red   = 0x0000;
+    track_background.green = 0x0000;
+    track_background.blue  = 0x0000;
+    track_background.pixel = 0x00000000;
+  }
+}
 
 }   // namespace timeline
 }   // namespace widgets

src/gui/widgets/timeline/timeline-body.hpp

@@ -31,21 +31,31 @@
 namespace lumiera {
 namespace gui {
 namespace widgets {
+
+class TimelineWidget;
+
 namespace timeline {
 
 class TimelineBody : public Gtk::DrawingArea
   {
   public:
-    TimelineBody(lumiera::gui::widgets::TimelineWidget &timeline_widget);
+    TimelineBody(lumiera::gui::widgets::TimelineWidget *timeline_widget);
 
   protected:
-    lumiera::gui::widgets::TimelineWidget &timelineWidget;
+    lumiera::gui::widgets::TimelineWidget *timelineWidget;
 
     /* ===== Events ===== */
   protected:
     void on_scroll();
 
     virtual bool on_expose_event(GdkEventExpose* event);
+    
+    /* ===== Internals ===== */
+  private:
+    void read_styles();
+    
+  private:
+    GdkColor track_background;
   };
 
 }   // namespace timeline

src/gui/widgets/timeline/track.cpp

@@ -39,7 +39,7 @@ Track::get_title()
   }
 
 void
-Track::draw_track()
+Track::draw_track(Cairo::RefPtr<Cairo::Context> cairo)
   {
     
   }

src/gui/widgets/timeline/track.hpp

@@ -44,7 +44,7 @@ class Track
 
     virtual int get_track_height() = 0;
 
-    virtual void draw_track();
+    virtual void draw_track(Cairo::RefPtr<Cairo::Context> cairo);
 
   protected:
     

src/gui/widgets/timeline/video-track.cpp

@@ -45,7 +45,7 @@ int VideoTrack::get_track_height()
     return 100;
   }
 
-void VideoTrack::draw_track()
+void VideoTrack::draw_track(Cairo::RefPtr<Cairo::Context> cairo)
   {
     
   }

src/gui/widgets/timeline/video-track.hpp

@@ -42,7 +42,7 @@ class VideoTrack : public Track
 
     virtual int get_track_height();
 
-    virtual void draw_track();
+    virtual void draw_track(Cairo::RefPtr<Cairo::Context> cairo);
 
   protected:
     Gtk::Label headerWidget;