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- Split between abstract base class (sgpem::CairoWidget) and 

derived widget
- Add History::set_notify_enabled() for usage by the frontend 
(for example, when loading from file, you'll want to call
set_notify_enabled(false) before starting)


git-svn-id: svn://svn.gna.org/svn/sgpemv2/trunk@823 3ecf2c5c-341e-0410-92b4-d18e462d057c
This commit is contained in:
tchernobog 2006-08-04 20:08:55 +00:00
parent 2174c25f74
commit 132db18b8c
8 changed files with 292 additions and 170 deletions
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2
Makefile.am
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@ -280,6 +280,7 @@ sgpemv2_LDADD = \
# Please keep this in sorted order:
sgpemv2_SOURCES = \
src/cairo_elements.cc \
src/cairo_widget.cc \
src/gui_builder.cc \
src/main.cc \
src/parse_opts.cc \
@ -288,6 +289,7 @@ sgpemv2_SOURCES = \
noinst_HEADERS += \
src/cairo_elements.hh \
src/cairo_widget.hh \
src/gui_builder.hh \
src/main.hh \
src/parse_opts.hh \

18
src/backend/history.cc
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@ -28,6 +28,13 @@
using namespace sgpem;
using namespace std;
History::History()
: _notify(true)
{
}
History::~History()
{
}
@ -52,7 +59,18 @@ History::detach(const HistoryObserver& observer)
void
History::notify_change()
{
if(!_notify) return;
for(RegisteredObservers::iterator it =_observers.begin();
it != _observers.end(); it++)
(*it)->update(*this);
}
bool
History::set_notify_enabled(bool enabled)
{
bool r = _notify;
_notify = enabled;
return r;
}

16
src/backend/history.hh
View File

@ -64,6 +64,7 @@ namespace sgpem
typedef Environment::resource_key_t resource_key_t;
typedef const std::pair<resource_key_t, Resource*> ResourcePair;
History();
virtual ~History() = 0;
virtual size_t get_size() const = 0;
@ -102,13 +103,26 @@ namespace sgpem
virtual void attach(HistoryObserver& observer);
virtual void detach(const HistoryObserver& observer);
/** \brief Enable/disable notifications to registered observers
*
* This is quite useful to disable momentarily notification while you
* do a bunch of insertions and/or deletions in one go, in order to
* speed up things.
*
* \return The old value
*/
virtual bool set_notify_enabled(bool enabled = true);
protected:
typedef std::vector<HistoryObserver*> RegisteredObservers;
RegisteredObservers _observers;
virtual void notify_change();
private:
bool _notify;
}; //~ class History
}//~ namespace sgpem

2
src/cairo_elements.cc
View File

@ -128,8 +128,10 @@ CairoElements::draw_container(const Rectangle& area)
cairo_set_source_rgb(cr, 1, 1, 0.9);
cairo_fill_preserve(cr);
cairo_set_line_width(cr, .005);
cairo_set_source_rgb(cr, 0, 0, 0);
cairo_stroke(cr);
cairo_restore(cr);
}

178
src/cairo_widget.cc Normal file
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@ -0,0 +1,178 @@
// src/cairo_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 "cairo_elements.hh"
#include "cairo_widget.hh"
#include "backend/history.hh"
#include "backend/simulation.hh"
#include <gdkmm/window.h>
#include <cassert>
#include <memory>
using namespace sgpem;
CairoWidget::CairoWidget()
: Glib::ObjectBase("sgpem_CairoWidget"),
Gtk::Widget(), _h(1), _buf(NULL)
{
set_flags(Gtk::NO_WINDOW);
// Register this observer:
Simulation::get_instance().get_history().attach(*this);
}
CairoWidget::~CairoWidget()
{
Simulation::get_instance().get_history().detach(*this);
}
void
CairoWidget::update(const History& history)
{
// get_window() returns a null pointer
// if the widget has not been realized
if(!is_realized())
return; // Nowhere to draw to.
// Determine the final height before to start drawing
unsigned int w = get_allocation().get_width();
_h = calc_height(history);
_buf = Gdk::Pixmap::create(get_window(), w, _h);
// Draw the widget background as the first thing.
// I've seen this is how it's done in the very Gtk+ toolkit
// for the GtkProgressBar widget.
GtkStyle* gStyle = get_style()->gobj();
gtk_paint_box(gStyle, _buf->gobj(),
GTK_STATE_NORMAL, GTK_SHADOW_ETCHED_IN,
NULL, this->gobj(), "through",
0, 0, w, _h);
cairo_t* ctx = gdk_cairo_create(_buf->gobj());
// do the drawing...
draw_widget(ctx);
cairo_scale(ctx, w, _h);
// manually force an expose_event?
cairo_destroy(ctx);
queue_draw();
}
void
CairoWidget::on_realize()
{
if(is_realized()) return;
Gtk::Widget::on_realize();
ensure_style();
GdkWindowAttr attributes;
memset(&attributes, 0, sizeof(attributes));
Gtk::Allocation alloc = get_allocation();
attributes.x = alloc.get_x();
attributes.y = alloc.get_y();
attributes.width = alloc.get_width();
attributes.height = alloc.get_height();
attributes.wclass = GDK_INPUT_OUTPUT;
attributes.event_mask = get_events() | GDK_EXPOSURE_MASK;
attributes.window_type = GDK_WINDOW_CHILD;
attributes.visual = get_visual()->gobj();
attributes.colormap = get_colormap()->gobj();
static const gint attributes_mask = Gdk::WA_X | Gdk::WA_Y | Gdk::WA_WMCLASS
| Gdk::WA_VISUAL | Gdk::WA_COLORMAP;
Glib::RefPtr<Gdk::Window> window = Gdk::Window::create(get_parent_window(),
&attributes,
attributes_mask);
unset_flags(Gtk::NO_WINDOW);
set_window(window);
window->set_user_data(gobj());
// Not sure if the following line is needed:
gtk_style_attach(get_style()->gobj(), window->gobj());
get_style()->set_background(window, Gtk::STATE_ACTIVE);
}
void
CairoWidget::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 = _h;
}
void
CairoWidget::on_size_allocate(const Gtk::Allocation& allocation)
{
set_allocation(allocation);
if(is_realized())
get_window()->move_resize(allocation.get_x(), allocation.get_y(),
allocation.get_width(), allocation.get_height());
}
bool
CairoWidget::on_expose_event(GdkEventExpose* event)
{
if(event == NULL || event->count > 0)
return false;
// calculated dinamically:
int w = get_allocation().get_width();
set_size_request(w, _h);
// Clip to redraw only the smallest possible area
// Use double buffering or we're CPU-dead
// Copy from the buffer to the screen
if(_buf)
get_window()->draw_drawable(get_style()->get_black_gc(), _buf,
event->area.x, event->area.y,
event->area.x, event->area.y,
event->area.width, event->area.height);
return true;
}
bool
CairoWidget::on_button_press_event(GdkEventButton* event)
{
// Not here. Yet.
return false;
}

68
src/cairo_widget.hh Normal file
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@ -0,0 +1,68 @@
// src/cairo_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 CAIRO_WIDGET_HH
#define CAIRO_WIDGET_HH 1
#include "config.h"
#include "backend/history_observer.hh"
#include <cairo.h>
#include <gtkmm/widget.h>
#include <gdkmm/pixmap.h>
namespace sgpem
{
class CairoWidget : public Gtk::Widget, public HistoryObserver
{
public:
CairoWidget();
virtual ~CairoWidget();
void update(const History& history);
protected:
virtual void on_realize();
virtual void on_size_allocate(const Gtk::Allocation& allocation);
virtual void on_size_request(Gtk::Requisition* requisition);
virtual bool on_expose_event(GdkEventExpose* event);
virtual bool on_button_press_event(GdkEventButton* event);
virtual void draw_widget(cairo_t* ctx) = 0;
virtual unsigned int calc_height(const History& history) const = 0;
typedef Gdk::Rectangle area_t;
typedef sigc::mem_functor0<void, CairoWidget> method0_t;
typedef std::pair<area_t, method0_t> area_callback_t;
typedef std::vector<area_callback_t> areas_vect_t;
private:
// The height the widget will assume, must be determined
// before starting drawing by calc_height()
unsigned int _h;
// The offscreen pixmap we use for double-buffering
Glib::RefPtr<Gdk::Pixmap> _buf;
};
} //~ namespace sgpem
#endif //~ CAIRO_WIDGET_HH

151
src/schedulables_widget.cc
View File

@ -18,72 +18,23 @@
// along with SGPEMv2; if not, write to the Free Software
// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
#include "cairo_elements.hh"
#include "schedulables_widget.hh"
#include "backend/history.hh"
#include "backend/simulation.hh"
#include <gdkmm/window.h>
#include "cairo_elements.hh"
#include <cassert>
#include <iostream>
#include <memory>
using namespace sgpem;
SchedulablesWidget::SchedulablesWidget()
: Glib::ObjectBase("sgpem_CairoWidget"),
Gtk::Widget(), _h(1), _buf(NULL)
: Glib::ObjectBase("sgpem_SchedulablesWidget"), CairoWidget()
{
set_flags(Gtk::NO_WINDOW);
// Register this observer:
Simulation::get_instance().get_history().attach(*this);
}
SchedulablesWidget::~SchedulablesWidget()
{
Simulation::get_instance().get_history().detach(*this);
}
void
SchedulablesWidget::update(const History& history)
{
// get_window() returns a null pointer
// if the widget has not been realized
if(!is_realized())
return; // Nowhere to draw to.
// Determine the final height before to start drawing
unsigned int w = get_allocation().get_width();
_h = calc_height(history);
_buf = Gdk::Pixmap::create(get_window(), w, _h);
// Draw the widget background as the first thing.
// I've seen this is how it's done in the very Gtk+ toolkit
// for the GtkProgressBar widget.
GtkStyle* gStyle = get_style()->gobj();
gtk_paint_box(gStyle, _buf->gobj(),
GTK_STATE_NORMAL, GTK_SHADOW_ETCHED_IN,
NULL, this->gobj(), "through",
0, 0, w, _h);
cairo_t* ctx = gdk_cairo_create(_buf->gobj());
// do the drawing...
draw_widget(ctx);
cairo_scale(ctx, w, _h);
// manually force an expose_event?
cairo_destroy(ctx);
queue_draw();
}
@ -92,10 +43,14 @@ SchedulablesWidget::draw_widget(cairo_t* ctx)
{
// NOTE: just to try
CairoElements ce(ctx);
Rectangle area = { 30, 30, 100, 100 };
ce.draw_container(area);
Color red = { 1, 0, 0 };
Point center = { 25, 25 };
ce.draw_3dsphere(center, 25, red);
ce.draw_3dsphere(center, 20, red);
}
@ -105,95 +60,3 @@ SchedulablesWidget::calc_height(const History& history) const
// FIXME: write me
return 400;
}
void
SchedulablesWidget::on_realize()
{
if(is_realized()) return;
Gtk::Widget::on_realize();
ensure_style();
GdkWindowAttr attributes;
memset(&attributes, 0, sizeof(attributes));
Gtk::Allocation alloc = get_allocation();
attributes.x = alloc.get_x();
attributes.y = alloc.get_y();
attributes.width = alloc.get_width();
attributes.height = alloc.get_height();
attributes.wclass = GDK_INPUT_OUTPUT;
attributes.event_mask = get_events() | GDK_EXPOSURE_MASK;
attributes.window_type = GDK_WINDOW_CHILD;
attributes.visual = get_visual()->gobj();
attributes.colormap = get_colormap()->gobj();
static const gint attributes_mask = Gdk::WA_X | Gdk::WA_Y | Gdk::WA_WMCLASS
| Gdk::WA_VISUAL | Gdk::WA_COLORMAP;
Glib::RefPtr<Gdk::Window> window = Gdk::Window::create(get_parent_window(),
&attributes,
attributes_mask);
unset_flags(Gtk::NO_WINDOW);
set_window(window);
window->set_user_data(gobj());
// Not sure if the following line is needed:
gtk_style_attach(get_style()->gobj(), window->gobj());
get_style()->set_background(window, Gtk::STATE_ACTIVE);
}
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 = _h;
}
void
SchedulablesWidget::on_size_allocate(const Gtk::Allocation& allocation)
{
set_allocation(allocation);
if(is_realized())
get_window()->move_resize(allocation.get_x(), allocation.get_y(),
allocation.get_width(), allocation.get_height());
}
bool
SchedulablesWidget::on_expose_event(GdkEventExpose* event)
{
if(event == NULL || event->count > 0)
return false;
// calculated dinamically:
int w = get_allocation().get_width();
set_size_request(w, _h);
// Clip to redraw only the smallest possible area
// Use double buffering or we're CPU-dead
// Copy from the buffer to the screen
if(_buf)
get_window()->draw_drawable(get_style()->get_black_gc(), _buf,
event->area.x, event->area.y,
event->area.x, event->area.y,
event->area.width, event->area.height);
return true;
}
bool
SchedulablesWidget::on_button_press_event(GdkEventButton* event)
{
// Not here. Yet.
return false;
}

27
src/schedulables_widget.hh
View File

@ -23,42 +23,19 @@
#include "config.h"
#include "backend/history_observer.hh"
#include <cairo.h>
#include <gtkmm/widget.h>
#include <gdkmm/pixmap.h>
#include "cairo_widget.hh"
namespace sgpem
{
class SchedulablesWidget : public Gtk::Widget, public HistoryObserver
class SchedulablesWidget : public CairoWidget
{
public:
SchedulablesWidget();
virtual ~SchedulablesWidget();
void update(const History& history);
protected:
virtual void on_realize();
virtual void on_size_allocate(const Gtk::Allocation& allocation);
virtual void on_size_request(Gtk::Requisition* requisition);
virtual bool on_expose_event(GdkEventExpose* event);
virtual bool on_button_press_event(GdkEventButton* event);
virtual void draw_widget(cairo_t* ctx);
virtual unsigned int calc_height(const History& history) const;
// The height the widget will assume, must be determined
// before starting drawing by calc_height().
unsigned int _h;
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;
Glib::RefPtr<Gdk::Pixmap> _buf;
};
} //~ namespace sgpem