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/*
* slideshow.c
*
* Colloquium - A tiny presentation program
*
* Copyright (c) 2011 Thomas White <taw@bitwiz.org.uk>
*
* 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 3 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, see <http://www.gnu.org/licenses/>.
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include <gtk/gtk.h>
#include <gdk/gdkkeysyms.h>
#include "presentation.h"
#include "slide_render.h"
#include "mainwindow.h"
static gint ss_destroy_sig(GtkWidget *widget, struct presentation *p)
{
p->slideshow = NULL;
gdk_cursor_unref(p->blank_cursor);
return FALSE;
}
static gboolean ss_expose_sig(GtkWidget *da, GdkEventExpose *event,
struct presentation *p)
{
cairo_t *cr;
GtkAllocation allocation;
double xoff, yoff;
check_redraw_slide(p->view_slide);
cr = gdk_cairo_create(da->window);
/* Overall background */
cairo_rectangle(cr, event->area.x, event->area.y,
event->area.width, event->area.height);
cairo_set_source_rgb(cr, 0.0, 0.0, 0.0);
cairo_fill(cr);
if ( !p->ss_blank ) {
/* Get the overall size */
gtk_widget_get_allocation(da, &allocation);
xoff = (allocation.width - p->slide_width)/2.0;
yoff = (allocation.height - p->slide_height)/2.0;
p->border_offs_x = xoff; p->border_offs_y = yoff;
/* Draw the slide from the cache */
cairo_rectangle(cr, event->area.x, event->area.y,
event->area.width, event->area.height);
cairo_set_source_surface(cr, p->view_slide->render_cache,
xoff, yoff);
cairo_fill(cr);
}
cairo_destroy(cr);
return FALSE;
}
void notify_slideshow_slide_changed(struct presentation *p)
{
gdk_window_invalidate_rect(p->ss_drawingarea->window, NULL, FALSE);
}
static gint prev_slide_sig(GtkWidget *widget, struct presentation *p)
{
if ( p->view_slide_number == 0 ) return FALSE;
p->view_slide_number--;
p->ss_blank = 0;
p->view_slide = p->slides[p->view_slide_number];
notify_slideshow_slide_changed(p);
notify_slide_changed(p);
return FALSE;
}
static gint next_slide_sig(GtkWidget *widget, struct presentation *p)
{
if ( p->view_slide_number == p->num_slides-1 ) return FALSE;
p->view_slide_number++;
p->ss_blank = 0;
p->view_slide = p->slides[p->view_slide_number];
notify_slideshow_slide_changed(p);
notify_slide_changed(p);
return FALSE;
}
void end_slideshow(struct presentation *p)
{
gtk_widget_destroy(p->ss_drawingarea);
gtk_widget_destroy(p->slideshow);
p->slideshow = NULL;
notify_slide_changed(p);
}
static gboolean ss_key_press_sig(GtkWidget *da, GdkEventKey *event,
struct presentation *p)
{
switch ( event->keyval ) {
case GDK_KEY_B :
case GDK_KEY_b :
p->ss_blank = 1-p->ss_blank;
gdk_window_invalidate_rect(p->ss_drawingarea->window,
NULL, FALSE);
break;
case GDK_KEY_Page_Up :
prev_slide_sig(NULL, p);
break;
case GDK_KEY_Page_Down :
next_slide_sig(NULL, p);
break;
case GDK_KEY_Escape :
end_slideshow(p);
break;
}
return FALSE;
}
static gboolean ss_realize_sig(GtkWidget *w, struct presentation *p)
{
p->blank_cursor = gdk_cursor_new(GDK_BLANK_CURSOR);
gdk_window_set_cursor(GDK_WINDOW(p->slideshow->window),
p->blank_cursor);
gtk_window_parse_geometry(GTK_WINDOW(w), p->ss_geom);
return FALSE;
}
void try_start_slideshow(struct presentation *p)
{
GtkWidget *n;
GdkScreen *screen;
int n_monitors;
int i;
/* Presentation already running? */
if ( p->slideshow != NULL ) return;
p->ss_blank = 0;
n = gtk_window_new(GTK_WINDOW_TOPLEVEL);
p->ss_drawingarea = gtk_drawing_area_new();
gtk_container_add(GTK_CONTAINER(n), p->ss_drawingarea);
gtk_widget_set_can_focus(GTK_WIDGET(p->ss_drawingarea), TRUE);
gtk_widget_add_events(GTK_WIDGET(p->ss_drawingarea),
GDK_KEY_PRESS_MASK);
g_signal_connect(G_OBJECT(p->ss_drawingarea), "key-press-event",
G_CALLBACK(ss_key_press_sig), p);
g_signal_connect(G_OBJECT(p->ss_drawingarea), "expose-event",
G_CALLBACK(ss_expose_sig), p);
g_signal_connect(G_OBJECT(n), "destroy", G_CALLBACK(ss_destroy_sig), p);
g_signal_connect(G_OBJECT(n), "realize", G_CALLBACK(ss_realize_sig), p);
gtk_widget_grab_focus(GTK_WIDGET(p->ss_drawingarea));
screen = gdk_screen_get_default();
n_monitors = gdk_screen_get_n_monitors(screen);
for ( i=0; i<n_monitors; i++ ) {
GdkRectangle rect;
gdk_screen_get_monitor_geometry(screen, i, &rect);
snprintf(p->ss_geom, 255, "%ix%i+%i+%i",
rect.width, rect.height, rect.x, rect.y);
}
p->slideshow = n;
gtk_window_fullscreen(GTK_WINDOW(n));
gtk_widget_show_all(GTK_WIDGET(n));
}
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