/* Handler for configure_event on drawing area. */
static gboolean desk_configure_event(GtkWidget * widget, GdkEventConfigure * event, PagerDesk * d)
{
/* Allocate pixmap and statistics buffer without border pixels. */
#if GTK_CHECK_VERSION(2,18,0)
GtkAllocation *allocation = g_new0 (GtkAllocation, 1);
gtk_widget_get_allocation(GTK_WIDGET(widget), allocation);
int new_pixmap_width = allocation->width;
int new_pixmap_height = allocation->height;
#else
int new_pixmap_width = widget->allocation.width;
int new_pixmap_height = widget->allocation.height;
#endif
if ((new_pixmap_width > 0) && (new_pixmap_height > 0))
{
/* Allocate a new pixmap of the allocated size. */
if (d->pixmap != NULL)
cairo_surface_destroy(d->pixmap);
d->pixmap = cairo_image_surface_create(CAIRO_FORMAT_RGB24, new_pixmap_width, new_pixmap_height);
cairo_t *cr = cairo_create(d->pixmap);
cairo_set_operator(cr, CAIRO_OPERATOR_CLEAR);
cairo_paint(cr);
check_cairo_status(cr);
cairo_destroy(cr);
check_cairo_surface_status(&d->pixmap);
/* Compute the horizontal and vertical scale factors, and mark the desktop for redraw. */
#if GTK_CHECK_VERSION(2,18,0)
d->scale_y = (gfloat) allocation->height / (gfloat) gdk_screen_height();
d->scale_x = (gfloat) allocation->width / (gfloat) gdk_screen_width();
#else
d->scale_y = (gfloat) allocation->height / (gfloat) gdk_screen_height();
d->scale_x = (gfloat) allocation->width / (gfloat) gdk_screen_width();
#endif
desk_set_dirty(d);
}
/* Resize to optimal size. */
gtk_widget_set_size_request(widget,
(d->pg->plugin->panel->icon_size - BORDER_WIDTH * 2) * d->pg->aspect_ratio,
d->pg->plugin->panel->icon_size - BORDER_WIDTH * 2);
#if GTK_CHECK_VERSION(2,18,0)
g_free (allocation);
#endif
return FALSE;
}
void dump_graph_to_png_file(const AdjacencyList &adjacency_list,
const VertexList &vertex_list,
const char *png_filename)
{
auto bbox = get_aabb(vertex_list);
double width = bbox.maxx - bbox.minx;
double height = bbox.maxy - bbox.miny;
auto surface = std::shared_ptr<cairo_surface_t>(
cairo_image_surface_create(CAIRO_FORMAT_RGB24, width, height),
cairo_surface_destroy);
check_cairo_surface_status(surface.get());
auto cr = std::shared_ptr<cairo_t>(
cairo_create(surface.get()),
cairo_destroy);
check_cairo_status(cr.get());
cairo_set_line_width(cr.get(), 1.0);
for (const auto &edge: adjacency_list) {
auto u = vertex_list.find(std::get<0>(edge));
if (u == vertex_list.end()) {
std::cout << "[WARNING] reference to non-existing vertex "
<< std::get<0>(edge) << std::endl;
continue;
}
for (const auto &way: std::get<1>(edge)) {
auto v = vertex_list.find(way.destination);
if (v == vertex_list.end()) {
std::cout << "[WARNING] reference to non-existing vertex "
<< way.destination << std::endl;
continue;
}
switch (way.type) {
case 0:
cairo_set_source_rgb(cr.get(), 1.0, 0.0, 0.0);
break;
case 1:
cairo_set_source_rgb(cr.get(), 0.0, 1.0, 0.0);
break;
case 2:
cairo_set_source_rgb(cr.get(), 0.0, 0.0, 1.0);
break;
default:
std::cout << "[WARNING] Wrong type of arc" << std::endl;
}
cairo_move_to(cr.get(),
u->second.x - bbox.minx,
height - (u->second.y - bbox.miny));
cairo_line_to(cr.get(),
v->second.x - bbox.minx,
height - (v->second.y - bbox.miny));
cairo_stroke(cr.get());
}
}
{
auto status = cairo_surface_write_to_png(surface.get(), png_filename);
cairo_status_to_exception(status);
}
}
/******************************************************************************
* Basic events handlers *
******************************************************************************/
static gboolean
configure_event(GtkWidget* widget, GdkEventConfigure* dummy, gpointer data)
{
(void) dummy;
int new_pixmap_width, new_pixmap_height;
new_pixmap_width = widget->allocation.width - BORDER_SIZE * 2;
new_pixmap_height = widget->allocation.height - BORDER_SIZE *2;
Monitor *m;
m = (Monitor *) data;
if (new_pixmap_width > 0 && new_pixmap_height > 0)
{
/*
* If the stats buffer does not exist (first time we get inside this
* function) or its size changed, reallocate the buffer and preserve
* existing data.
*/
if (!m->stats || (new_pixmap_width != m->pixmap_width))
{
stats_set *new_stats = g_new0(stats_set, new_pixmap_width);
if (!new_stats)
return TRUE;
if (m->stats)
{
/* New allocation is larger.
* Add new "oldest" samples of zero following the cursor*/
if (new_pixmap_width > m->pixmap_width)
{
/* Number of values between the ring cursor and the end of
* the buffer */
int nvalues = m->pixmap_width - m->ring_cursor;
memcpy(new_stats,
m->stats,
m->ring_cursor * sizeof (stats_set));
memcpy(new_stats + nvalues,
m->stats + m->ring_cursor,
nvalues * sizeof(stats_set));
}
/* New allocation is smaller, but still larger than the ring
* buffer cursor */
else if (m->ring_cursor <= new_pixmap_width)
{
/* Numver of values that can be stored between the end of
* the new buffer and the ring cursor */
int nvalues = new_pixmap_width - m->ring_cursor;
memcpy(new_stats,
m->stats,
m->ring_cursor * sizeof(stats_set));
memcpy(new_stats + m->ring_cursor,
m->stats + m->pixmap_width - nvalues,
nvalues * sizeof(stats_set));
}
/* New allocation is smaller, and also smaller than the ring
* buffer cursor. Discard all oldest samples following the ring
* buffer cursor and additional samples at the beginning of the
* buffer. */
else
{
memcpy(new_stats,
m->stats + m->ring_cursor - new_pixmap_width,
new_pixmap_width * sizeof(stats_set));
}
g_free(m->stats);
}
m->stats = new_stats;
}
m->pixmap_width = new_pixmap_width;
m->pixmap_height = new_pixmap_height;
if (m->pixmap)
cairo_surface_destroy(m->pixmap);
m->pixmap = cairo_image_surface_create(CAIRO_FORMAT_RGB24,
m->pixmap_width,
m->pixmap_height);
check_cairo_surface_status(&m->pixmap);
redraw_pixmap(m);
}
return TRUE;
}