David Robillard
bb9cc45cd2
Vimmers, try let c_space_errors = 1 in your .vimrc to highlight this kind of stuff in red. I don't know the emacs equivalent... git-svn-id: svn://localhost/ardour2/branches/3.0@5773 d708f5d6-7413-0410-9779-e7cbd77b26cf
112 lines
2.3 KiB
C++
112 lines
2.3 KiB
C++
/*
|
|
Copyright (C) 2009 Paul Davis
|
|
|
|
This program 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.
|
|
|
|
This program 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 this program; if not, write to the Free Software
|
|
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
|
|
*/
|
|
|
|
#include "cairo_widget.h"
|
|
#include "gui_thread.h"
|
|
|
|
CairoWidget::CairoWidget ()
|
|
: _width (1),
|
|
_height (1),
|
|
_dirty (true),
|
|
_pixmap (0)
|
|
{
|
|
|
|
}
|
|
|
|
CairoWidget::~CairoWidget ()
|
|
{
|
|
if (_pixmap) {
|
|
gdk_pixmap_unref (_pixmap);
|
|
}
|
|
}
|
|
|
|
bool
|
|
CairoWidget::on_expose_event (GdkEventExpose *event)
|
|
{
|
|
Gdk::Rectangle const exposure (
|
|
event->area.x, event->area.y, event->area.width, event->area.height
|
|
);
|
|
|
|
Gdk::Rectangle r = exposure;
|
|
Gdk::Rectangle content (0, 0, _width, _height);
|
|
bool intersects;
|
|
r.intersect (content, intersects);
|
|
|
|
if (intersects) {
|
|
|
|
GdkDrawable* drawable = get_window()->gobj ();
|
|
|
|
if (_dirty) {
|
|
|
|
if (_pixmap) {
|
|
gdk_pixmap_unref (_pixmap);
|
|
}
|
|
|
|
_pixmap = gdk_pixmap_new (drawable, _width, _height, -1);
|
|
|
|
cairo_t* cr = gdk_cairo_create (_pixmap);
|
|
render (cr);
|
|
cairo_destroy (cr);
|
|
|
|
_dirty = false;
|
|
}
|
|
|
|
gdk_draw_drawable (
|
|
drawable,
|
|
get_style()->get_fg_gc (Gtk::STATE_NORMAL)->gobj(),
|
|
_pixmap,
|
|
r.get_x(),
|
|
r.get_y(),
|
|
r.get_x(),
|
|
r.get_y(),
|
|
r.get_width(),
|
|
r.get_height()
|
|
);
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/** Marks the widget as dirty, so that render () will be called on
|
|
* the next GTK expose event.
|
|
*/
|
|
|
|
void
|
|
CairoWidget::set_dirty ()
|
|
{
|
|
ENSURE_GUI_THREAD (mem_fun (*this, &CairoWidget::set_dirty));
|
|
|
|
_dirty = true;
|
|
queue_draw ();
|
|
}
|
|
|
|
/** Handle a size allocation.
|
|
* @param alloc GTK allocation.
|
|
*/
|
|
void
|
|
CairoWidget::on_size_allocate (Gtk::Allocation& alloc)
|
|
{
|
|
Gtk::EventBox::on_size_allocate (alloc);
|
|
|
|
_width = alloc.get_width ();
|
|
_height = alloc.get_height ();
|
|
|
|
set_dirty ();
|
|
}
|