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/*
* slideshow.c
*
* Copyright © 2013-2018 Thomas White <taw@bitwiz.org.uk>
*
* This file is part of Colloquium.
*
* Colloquium 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 <libintl.h>
#define _(x) gettext(x)
#include <narrative.h>
#include "slide_render_cairo.h"
#include "slideshow.h"
#include "colloquium.h"
#include "pr_clock.h"
G_DEFINE_TYPE_WITH_CODE(SCSlideshow, sc_slideshow, GTK_TYPE_WINDOW, NULL)
static void sc_slideshow_init(SCSlideshow *ss)
{
}
void sc_slideshow_class_init(SCSlideshowClass *klass)
{
}
static void redraw(SCSlideshow *ss)
{
gint w, h;
w = gtk_widget_get_allocated_width(GTK_WIDGET(ss->drawingarea));
h = gtk_widget_get_allocated_height(GTK_WIDGET(ss->drawingarea));
gtk_widget_queue_draw_area(ss->drawingarea, 0, 0, w, h);
}
static gint ssh_destroy_sig(GtkWidget *widget, SCSlideshow *ss)
{
if ( ss->blank_cursor != NULL ) {
g_object_unref(ss->blank_cursor);
}
if ( ss->inhibit_cookie ) {
gtk_application_uninhibit(ss->app, ss->inhibit_cookie);
}
return FALSE;
}
static gboolean ss_draw_sig(GtkWidget *da, cairo_t *cr, SCSlideshow *ss)
{
double dw, dh; /* Size of drawing area */
double lw, lh; /* Logical size of slide */
double sw, sh; /* Size of slide on screen */
double xoff, yoff;
dw = gtk_widget_get_allocated_width(GTK_WIDGET(da));
dh = gtk_widget_get_allocated_height(GTK_WIDGET(da));
/* Overall background */
cairo_rectangle(cr, 0.0, 0.0, dw, dh);
cairo_set_source_rgb(cr, 0.0, 0.0, 0.0);
cairo_fill(cr);
slide_get_logical_size(ss->cur_slide,
narrative_get_stylesheet(ss->n), &lw, &lh);
if ( lw/lh > (double)dw/dh ) {
/* Slide is too wide. Letterboxing top/bottom */
sw = dw;
sh = dw * lh/lw;
} else {
/* Letterboxing at sides */
sw = dh * lw/lh;
sh = dh;
}
xoff = (dw - sw)/2.0;
yoff = (dh - sh)/2.0;
if ( !ss->blank ) {
PangoContext *pc;
int n;
struct slide_pos sel;
cairo_save(cr);
cairo_translate(cr, xoff, yoff);
cairo_scale(cr, sw/lw, sh/lh);
sel.para = 0; sel.pos = 0; sel.trail = 0;
n = narrative_get_slide_number_for_slide(ss->n, ss->cur_slide);
pc = pango_cairo_create_context(cr);
slide_render_cairo(ss->cur_slide, cr,
narrative_get_imagestore(ss->n),
narrative_get_stylesheet(ss->n),
n, pango_language_get_default(), pc,
NULL, sel, sel);
g_object_unref(pc);
cairo_restore(cr);
}
return FALSE;
}
static gboolean ss_realize_sig(GtkWidget *w, SCSlideshow *ss)
{
if ( (ss->app == NULL) || colloquium_get_hidepointer(COLLOQUIUM(ss->app)) ) {
/* Hide the pointer */
GdkWindow *win;
win = gtk_widget_get_window(w);
ss->blank_cursor = gdk_cursor_new_for_display(gdk_display_get_default(),
GDK_BLANK_CURSOR);
gdk_window_set_cursor(GDK_WINDOW(win), ss->blank_cursor);
} else {
ss->blank_cursor = NULL;
}
return FALSE;
}
void sc_slideshow_set_slide(SCSlideshow *ss, Slide *ns)
{
ss->cur_slide = ns;
redraw(ss);
}
SCSlideshow *sc_slideshow_new(Narrative *n, GtkApplication *app)
{
GdkDisplay *display;
int n_monitors;
SCSlideshow *ss;
ss = g_object_new(SC_TYPE_SLIDESHOW, NULL);
if ( ss == NULL ) return NULL;
ss->blank = 0;
ss->n = n;
ss->cur_slide = NULL;
ss->blank_cursor = NULL;
ss->app = app;
ss->drawingarea = gtk_drawing_area_new();
gtk_container_add(GTK_CONTAINER(ss), ss->drawingarea);
gtk_widget_set_can_focus(GTK_WIDGET(ss->drawingarea), TRUE);
gtk_widget_add_events(GTK_WIDGET(ss->drawingarea),
GDK_KEY_PRESS_MASK);
g_signal_connect(G_OBJECT(ss), "destroy",
G_CALLBACK(ssh_destroy_sig), ss);
g_signal_connect(G_OBJECT(ss), "realize",
G_CALLBACK(ss_realize_sig), ss);
g_signal_connect(G_OBJECT(ss->drawingarea), "draw",
G_CALLBACK(ss_draw_sig), ss);
gtk_widget_grab_focus(GTK_WIDGET(ss->drawingarea));
display = gdk_display_get_default();
n_monitors = gdk_display_get_n_monitors(display);
GdkMonitor *mon_ss;
if ( n_monitors == 1 ) {
mon_ss = gdk_display_get_primary_monitor(display);
printf(_("Single monitor mode\n"));
ss->single_monitor = 1;
} else {
mon_ss = gdk_display_get_monitor(display, 1);
printf(_("Dual monitor mode\n"));
ss->single_monitor = 0;
}
/* Workaround because gtk_window_fullscreen_on_monitor doesn't work */
GdkRectangle rect;
gdk_monitor_get_geometry(mon_ss, &rect);
gtk_window_move(GTK_WINDOW(ss), rect.x, rect.y);
gtk_window_fullscreen(GTK_WINDOW(ss));
if ( app != NULL ) {
ss->inhibit_cookie = gtk_application_inhibit(app, GTK_WINDOW(ss),
GTK_APPLICATION_INHIBIT_IDLE,
_("Presentation slide show is running"));
}
return ss;
}
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