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authorThomas White <taw@bitwiz.org.uk>2011-05-29 15:09:25 +0200
committerThomas White <taw@bitwiz.org.uk>2011-05-29 15:09:25 +0200
commita445fa6c5db2bee21f3e64bb8fb108ea1363fd9b (patch)
tree33cd927d86526a19999b96b7f9aec76660ec1e26 /src/slideshow.c
parent091dbe113cfde2135d3ed389f8057022294d9fc0 (diff)
Add slide show mode
Diffstat (limited to 'src/slideshow.c')
-rw-r--r--src/slideshow.c162
1 files changed, 162 insertions, 0 deletions
diff --git a/src/slideshow.c b/src/slideshow.c
new file mode 100644
index 0000000..00b7dd7
--- /dev/null
+++ b/src/slideshow.c
@@ -0,0 +1,162 @@
+/*
+ * 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;
+ 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);
+
+ /* 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;
+}
+
+
+static gint prev_slide_sig(GtkWidget *widget, struct presentation *p)
+{
+ if ( p->view_slide_number == 0 ) return FALSE;
+
+ p->view_slide_number--;
+ p->view_slide = p->slides[p->view_slide_number];
+
+ gdk_window_invalidate_rect(p->ss_drawingarea->window, NULL, FALSE);
+
+ 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->view_slide = p->slides[p->view_slide_number];
+
+ gdk_window_invalidate_rect(p->ss_drawingarea->window, NULL, FALSE);
+
+ notify_slide_changed(p);
+
+ return FALSE;
+}
+
+
+static gboolean ss_key_press_sig(GtkWidget *da, GdkEventKey *event,
+ struct presentation *p)
+{
+ switch ( event->keyval ) {
+
+ 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 :
+ gtk_widget_destroy(p->ss_drawingarea);
+ gtk_widget_destroy(p->slideshow);
+ break;
+
+ }
+
+ return FALSE;
+}
+
+
+void try_start_slideshow(struct presentation *p)
+{
+ GtkWidget *n;
+
+ /* Presentation already running? */
+ if ( p->slideshow != NULL ) return;
+
+ 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);
+
+ gtk_widget_grab_focus(GTK_WIDGET(p->ss_drawingarea));
+
+ p->slideshow = n;
+ gtk_window_fullscreen(GTK_WINDOW(n));
+ gtk_widget_show_all(GTK_WIDGET(n));
+}