From 3978cee519402cd06e658fcf45deca07c806ba52 Mon Sep 17 00:00:00 2001
From: Thomas White <taw@physics.org>
Date: Mon, 26 Mar 2018 23:02:13 +0200
Subject: Add option to hide pointer (or not)

---
 src/colloquium.c | 47 +++++++++++++++++++++++++++++++++++++++--------
 src/colloquium.h |  5 ++++-
 src/slideshow.c  | 20 +++++++++++++-------
 3 files changed, 56 insertions(+), 16 deletions(-)

diff --git a/src/colloquium.c b/src/colloquium.c
index 830c2f7..1963780 100644
--- a/src/colloquium.c
+++ b/src/colloquium.c
@@ -45,6 +45,7 @@ struct _colloquium
 	char *mydir;
 	int first_run;
 	char *imagestore;
+	int hidepointer;
 };
 
 
@@ -232,11 +233,29 @@ static void create_config(const char *filename)
 
 	fprintf(fh, "imagestore: %s\n",
 	        g_get_user_special_dir(G_USER_DIRECTORY_PICTURES));
+	fprintf(fh, "hidepointer: no\n");
 
 	fclose(fh);
 }
 
 
+static int yesno(const char *a)
+{
+	if ( a == NULL ) return 0;
+
+	if ( strcmp(a, "1") == 0 ) return 1;
+	if ( strcasecmp(a, "yes") == 0 ) return 1;
+	if ( strcasecmp(a, "true") == 0 ) return 1;
+
+	if ( strcasecmp(a, "0") == 0 ) return 0;
+	if ( strcasecmp(a, "no") == 0 ) return 0;
+	if ( strcasecmp(a, "false") == 0 ) return 0;
+
+	fprintf(stderr, "Don't understand '%s', assuming false\n", a);
+	return 0;
+}
+
+
 static void read_config(const char *filename, Colloquium *app)
 {
 	FILE *fh;
@@ -248,15 +267,19 @@ static void read_config(const char *filename, Colloquium *app)
 		return;
 	}
 
-	if ( fgets(line, 1024, fh) == NULL ) {
-		fprintf(stderr, "Failed to read from config\n");
-		return;
-	}
-	chomp(line);
+	do {
 
-	if ( strncmp(line, "imagestore: ", 11) == 0 ) {
-		app->imagestore = strdup(line+12);
-	}
+		if ( fgets(line, 1024, fh) == NULL ) break;
+		chomp(line);
+
+		if ( strncmp(line, "imagestore: ", 11) == 0 ) {
+			app->imagestore = strdup(line+12);
+		}
+
+		if ( strncmp(line, "hidepointer: ", 12) == 0 ) {
+			app->hidepointer = yesno(line+13);
+		}
+	} while ( !feof(fh) );
 
 	fclose(fh);
 }
@@ -268,6 +291,12 @@ const char *colloquium_get_imagestore(Colloquium *app)
 }
 
 
+int colloquium_get_hidepointer(Colloquium *app)
+{
+	return app->hidepointer;
+}
+
+
 static void colloquium_startup(GApplication *papp)
 {
 	Colloquium *app = COLLOQUIUM(papp);
@@ -510,6 +539,8 @@ static void colloquium_class_init(ColloquiumClass *class)
 
 static void colloquium_init(Colloquium *app)
 {
+	app->imagestore = NULL;
+	app->hidepointer = 0;
 }
 
 
diff --git a/src/colloquium.h b/src/colloquium.h
index ccbb964..beb7ec8 100644
--- a/src/colloquium.h
+++ b/src/colloquium.h
@@ -36,6 +36,9 @@ typedef struct _colloquium Colloquium;
                                    GTK_TYPE_APPLICATION, Colloquium))
 
 
-const char *colloquium_get_imagestore(Colloquium *app);
+extern const char *colloquium_get_imagestore(Colloquium *app);
+
+extern int colloquium_get_hidepointer(Colloquium *app);
+
 
 #endif	/* COLLOQUIUM_H */
diff --git a/src/slideshow.c b/src/slideshow.c
index 84f1edb..3e33c3d 100644
--- a/src/slideshow.c
+++ b/src/slideshow.c
@@ -31,6 +31,7 @@
 #include <gtk/gtk.h>
 #include <gdk/gdkkeysyms.h>
 
+#include "colloquium.h"
 #include "presentation.h"
 #include "render.h"
 #include "pr_clock.h"
@@ -86,7 +87,7 @@ static gint ssh_destroy_sig(GtkWidget *widget, SCSlideshow *ss)
 	if ( ss->surface != NULL ) {
 		cairo_surface_destroy(ss->surface);
 	}
-	if ( ss->app != NULL ) {
+	if ( ss->inhibit_cookie ) {
 		gtk_application_uninhibit(ss->app, ss->inhibit_cookie);
 	}
 	return FALSE;
@@ -121,13 +122,18 @@ static gboolean ss_draw_sig(GtkWidget *da, cairo_t *cr, SCSlideshow *ss)
 
 static gboolean ss_realize_sig(GtkWidget *w, SCSlideshow *ss)
 {
-	GdkWindow *win;
+	if ( (ss->app == NULL) || colloquium_get_hidepointer(COLLOQUIUM(ss->app)) ) {
 
-	win = gtk_widget_get_window(w);
+		/* 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);
 
-	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;
+	}
 
 	slideshow_rerender(ss);
 
@@ -183,6 +189,7 @@ SCSlideshow *sc_slideshow_new(struct presentation *p, GtkApplication *app)
 	ss->cur_slide = NULL;
 	ss->blank_cursor = NULL;
 	ss->surface = NULL;
+	ss->app = app;
 
 	ss->drawingarea = gtk_drawing_area_new();
 	gtk_container_add(GTK_CONTAINER(ss), ss->drawingarea);
@@ -229,7 +236,6 @@ SCSlideshow *sc_slideshow_new(struct presentation *p, GtkApplication *app)
 		ss->inhibit_cookie = gtk_application_inhibit(app, GTK_WINDOW(ss),
 		                                             GTK_APPLICATION_INHIBIT_IDLE,
 		                                             "Presentation slide show is running");
-		ss->app = app;
 	}
 
 	return ss;
-- 
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