- Add stubs to implement custom widget to show schedulables entities.

Paint a red clown nose just to show the humour of the thing, and that it
works(?).


git-svn-id: svn://svn.gna.org/svn/sgpemv2/trunk@755 3ecf2c5c-341e-0410-92b4-d18e462d057c

Makefile.am

@@ -269,6 +269,7 @@ sgpemv2_SOURCES = \
 	src/main_window.cc \
 	src/observer.cc \
 	src/parse_opts.cc \
+	src/schedulables_widget.cc \
 	src/simulation.cc \
 	src/standard_io.cc \
 	src/text_simulation.cc
@@ -282,6 +283,7 @@ noinst_HEADERS += \
 	src/main_window.hh \
 	src/observer.hh \
 	src/parse_opts.hh \
+	src/schedulables_widget.hh \
 	src/simulation.hh \
 	src/standard_io.hh \
 	src/text_simulation.hh

src/gui_builder.cc

@@ -21,10 +21,12 @@
 #include "config.h"
 #include "gettext.h"
 
+#include "schedulables_widget.hh"
 #include "gui_builder.hh"
 
 #include <glibmm/ustring.h>
 #include <gtkmm/aboutdialog.h>
+#include <gtkmm/expander.h>
 #include <gtkmm/main.h>
 #include <gtkmm/menuitem.h>
 
@@ -54,6 +56,14 @@ GuiBuilder::GuiBuilder(const std::string& gladefile)
 	AboutDialog* about_dialog = NULL;
 	_refXml->get_widget("AboutDialog", about_dialog);
 	help_about->signal_activate().connect(sigc::mem_fun(*about_dialog, &Window::show));
+
+	// Temporary code to test the Schedulables custom widget
+	Expander* scheds_expander = NULL;
+	_refXml->get_widget("SchedulablesExpander", scheds_expander);
+	SchedulablesWidget* scheds_widget = manage(new SchedulablesWidget());
+	scheds_expander->add(*scheds_widget);
+	// we have to remember to manually show custom added widgets:
+	scheds_widget->show();
 }
 
 

src/schedulables_widget.cc

@@ -0,0 +1,128 @@
+// src/schedulables_widget.cc - Copyright 2005, 2006, University
+//               of Padova, dept. of Pure and Applied
+//               Mathematics
+//
+// This file is part of SGPEMv2.
+//
+// This is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation; either version 2 of the License, or
+// (at your option) any later version.
+//
+// SGPEMv2 is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with SGPEMv2; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+
+#include "schedulables_widget.hh"
+
+#include <cmath>
+
+using namespace sgpem;
+
+
+SchedulablesWidget::SchedulablesWidget()
+  : _ctx(NULL)
+{
+  // Add other events we want to manage (as mouse clicks)
+  // when needed
+  add_events(Gdk::EXPOSURE_MASK);	   
+}
+ 
+
+SchedulablesWidget::~SchedulablesWidget()
+{
+}
+
+
+void 
+SchedulablesWidget::update(const History& history)
+{
+  // FIXME : write me
+}
+
+ 
+void 
+SchedulablesWidget::on_size_request(Gtk::Requisition* requisition)
+{
+  // FIXME: take correct measures, consider also using a viewport(?)
+  *requisition = Gtk::Requisition();
+  requisition->width = get_allocation().get_width();
+  requisition->height = requisition->width;
+}
+
+
+bool 
+SchedulablesWidget::on_expose_event(GdkEventExpose* event)
+{
+  // Use double buffering or we're CPU-dead
+
+  Glib::RefPtr<Gdk::Window> window = get_window();
+  GdkWindow* gdkWindow = window->gobj();
+  GdkDrawable* gdkDrawable;
+  gint xOffset, yOffset;
+  gdk_window_get_internal_paint_info(gdkWindow, &gdkDrawable, &xOffset, &yOffset);
+
+  // Copy new ctx from old one (the buffer); from distant memories,
+  // we should use something like create_similar to instantiate a 
+  // compatible surface and then copy the buffer to fg
+  // So the following two lines WILL HAVE TO CHANGE.
+  cairo_t*& cr = _ctx;
+  cr = gdk_cairo_create(gdkDrawable); 
+
+  const Gtk::Allocation& allocation = get_allocation();
+  int width  = allocation.get_width();
+  int height = allocation.get_height();
+  
+  // Already clip, so that paint hasn't to care about it:
+  if(event) 
+    {
+      cairo_rectangle(cr, event->area.x, event->area.y,
+		      event->area.width, event->area.height);
+      cairo_clip(cr);
+    }
+  
+  // NOTE: just to try:
+  
+  // should be calculated dinamically:
+  set_size_request(200,400);
+  
+  // Height should be calculated dynamically?
+  cairo_scale(cr, width, width);
+  cairo_set_line_width(cr, 0.02);
+  cairo_set_source_rgba(cr, 0, 0, 0, 1);
+  
+  // Draw initial sphere perimeter
+  float r = 1.f, g = 0.f, b = 0.f;
+  double x = .5, y = .5, radius = .5;
+  cairo_save(cr);
+  cairo_new_path(cr);
+  cairo_arc(cr, x, y, radius, 0, 2*M_PI);
+  cairo_pattern_t* grad = cairo_pattern_create_radial(x, y, radius, x, y, radius - .15);
+  cairo_pattern_add_color_stop_rgba(grad,  0, r - .2, g - .2, b - .2, 1);
+  cairo_pattern_add_color_stop_rgba(grad,  1,      r,      g,      b, 1);
+  cairo_set_source(cr, grad);
+  cairo_fill_preserve(cr);
+  cairo_pattern_destroy(grad);
+  cairo_set_source_rgba(cr, 0, 0, 0, 1);
+  cairo_set_line_width(cr, radius * .01);
+  cairo_stroke(cr);
+  cairo_restore(cr);	
+
+  cairo_destroy(cr);
+  
+  return true; 
+}
+ 
+
+bool 
+SchedulablesWidget::on_button_press_event(GdkEventButton* event)
+{
+  // Not here. Yet.
+  return false;
+}
+

src/schedulables_widget.hh

@@ -0,0 +1,57 @@
+// src/schedulables_widget.hh - Copyright 2005, 2006, University
+//               of Padova, dept. of Pure and Applied
+//               Mathematics
+//
+// This file is part of SGPEMv2.
+//
+// This is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation; either version 2 of the License, or
+// (at your option) any later version.
+//
+// SGPEMv2 is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with SGPEMv2; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+
+#ifndef SCHEDULABLES_WIDGET_HH
+#define SCHEDULABLES_WIDGET_HH 1
+
+#include "config.h"
+
+#include "backend/history_observer.hh"
+
+#include <gtkmm/drawingarea.h>
+
+namespace sgpem
+{
+  class SchedulablesWidget : public Gtk::DrawingArea, public HistoryObserver
+  {
+  public:
+    SchedulablesWidget();
+    virtual ~SchedulablesWidget();
+
+    void update(const History& history);
+
+  protected:
+    virtual void on_size_request(Gtk::Requisition* requisition);
+    virtual bool on_expose_event(GdkEventExpose* event);
+    virtual bool on_button_press_event(GdkEventButton* event);
+
+  private:
+    typedef Gdk::Rectangle                               area_t;
+    typedef sigc::mem_functor0<void, SchedulablesWidget> method0_t;
+    typedef std::pair<area_t, method0_t>                 area_callback_t;
+    typedef std::vector<area_callback_t>                 areas_vect_t;
+    
+    cairo_t*  _ctx;
+  };
+
+} //~ namespace sgpem
+
+
+#endif //~ SCHEDULABLES_WIDGET_HH