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Diffstat (limited to 'src/slideshow.c')
| -rw-r--r-- | src/slideshow.c | 162 |
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)); +} |