From 6a50df3b87fcaedb8e7ea69f415e35485d0ad9bd Mon Sep 17 00:00:00 2001
From: =?utf8?q?Rafa=C5=82=20D=C5=82ugo=C5=82=C4=99cki?=
 <rafal@dlugolecki.net.pl>
Date: Mon, 26 Jan 2015 00:11:09 +0100
Subject: [PATCH] Added scrolling using mouse or touchpad.

---
 src/familia.h         | 32 ++++++++++++++++++++++++++++++++
 src/main.c            | 11 ++++++++++-
 src/ui/drawing_area.c | 34 ++++++++++++++++++++++++++++------
 3 files changed, 70 insertions(+), 7 deletions(-)
 create mode 100644 src/familia.h

diff --git a/src/familia.h b/src/familia.h
new file mode 100644
index 0000000..4dc0f63
--- /dev/null
+++ b/src/familia.h
@@ -0,0 +1,32 @@
+/****************************************************************************
+ *  Familia Lignum - Genealogical program                                   *
+ *  Copyright (C) 2011-2014 Rafał Długołęcki <rafal@dlugolecki.net.pl>      *
+ *                                                                          *
+ *  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; version 2 of the License.                 *
+ *                                                                          *
+ *  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, write to the Free Software Foundation, Inc., *
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.             *
+ *                                                                          *
+ ****************************************************************************/
+
+#ifndef _FAMILIA_H
+#define _FAMILIA_H
+
+
+#include <gtk/gtkgl.h>
+#include "../config.h"
+
+typedef struct familia_data {
+	GtkAdjustment *vadjustment;
+	GtkAdjustment *hadjustment;
+} FamiliaData;
+
+#endif /*_FAMILIA_H */
diff --git a/src/main.c b/src/main.c
index 2d40638..db22d06 100644
--- a/src/main.c
+++ b/src/main.c
@@ -30,6 +30,7 @@
 #include "i18n.h"
 #include "debug.h"
 #include "commandline.h"
+#include "familia.h"
 #include "storage/storage.h"
 #include "gedcom/familia_gedcom.h"
 
@@ -47,6 +48,7 @@ int main(int argc, char** argv) {
 	GtkBuilder *builder = NULL;
 	GtkWidget *window = NULL;
 	GdkGLConfig *glconfig = NULL;
+	FamiliaData * app = NULL;
 	struct familia_storage * storage = NULL;
 
 	storage = familia_storage_new();
@@ -83,7 +85,12 @@ int main(int argc, char** argv) {
 	builder = gtk_builder_new();
 
 	gtk_builder_add_from_file(builder, get_guidatafile(), NULL);
-	gtk_builder_connect_signals(builder, NULL);
+
+	app = g_new(FamiliaData, 1);
+	app->hadjustment = gtk_builder_get_object(builder, "horizontal-adjustment");
+	app->vadjustment = gtk_builder_get_object(builder, "vertical-adjustment");
+
+	gtk_builder_connect_signals(builder, app);
 
 	window = GTK_WIDGET(gtk_builder_get_object(builder, "main-window"));
 	drawing_area = GTK_WIDGET(gtk_builder_get_object(builder, "drawing-area"));
@@ -103,5 +110,7 @@ int main(int argc, char** argv) {
 		storage = NULL;
 	}
 
+	g_free(app);
+
 	return 0;
 }
diff --git a/src/ui/drawing_area.c b/src/ui/drawing_area.c
index 06ba5e5..3457998 100644
--- a/src/ui/drawing_area.c
+++ b/src/ui/drawing_area.c
@@ -5,6 +5,7 @@
 #include <assert.h>
 
 #include "../debug.h"
+#include "../familia.h"
 #include "drawing_area.h"
 #include "../math/3d.h"
 #include "../graphics/constants.h"
@@ -152,21 +153,42 @@ void drawing_area_unrealize (GtkWidget *widget, gpointer data)
 
 /**
  * The "scroll-event" signal handler. Responsible for correctly scrolling
- * drawing area.
+ * drawing area using mouse or touchpad.
  */
 void drawing_area_event_scroll (GtkWidget *widget,
-				GdkEventScroll *event, gpointer user_data)
+				GdkEventScroll *event, FamiliaData *data)
 {
+	GtkAdjustment *adjustment = NULL;
+	gdouble value = 0;
+	gdouble step = 0;
+
 	assert(event->type == GDK_SCROLL);
 
 	switch(event->direction) {
 		case GDK_SCROLL_UP:
-			camera_pos_y++;
-			gtk_widget_queue_draw(widget);
+			adjustment = data->vadjustment;
+			step = 1;
 			break;
 		case GDK_SCROLL_DOWN:
-			camera_pos_y--;
-			gtk_widget_queue_draw(widget);
+			adjustment = data->vadjustment;
+			step = -1;
+			break;
+		case GDK_SCROLL_LEFT:
+			adjustment = data->hadjustment;
+			step = -1;
+			break;
+		case GDK_SCROLL_RIGHT:
+			adjustment = data->hadjustment;
+			step = 1;
 			break;
 	}
+
+	if (adjustment != NULL) {
+		value = gtk_adjustment_get_value (adjustment);
+		step  = step * gtk_adjustment_get_step_increment(adjustment);
+		value += step;
+
+		gtk_adjustment_set_value (adjustment, value);
+		gtk_adjustment_value_changed (adjustment);
+	}
 }
-- 
2.30.2