Added scrollwheel bindings for image switching

1 files changed, 52 insertions, 16 deletions

diff --git a/main.c b/main.c
index d762469..c1a9eaa 100644
--- a/main.c
+++ b/main.c
@@ -12,9 +12,36 @@ GtkWidget *window;
 gint win_width, win_height;
 GError *error = NULL;
 
-static gboolean key_press(GtkWindow *window, GdkEvent *event, gpointer data)
+void next()
+{
+    char *name;
+    if ((name = get_next_file()) != NULL)
+        load_image(name, win_width, win_height);
+}
+
+void prev()
 {
     char *name;
+    if ((name = get_prev_file()) != NULL)
+        load_image(name, win_width, win_height);
+}
+
+void first()
+{
+    char *name;
+    if ((name = get_first_file()) != NULL)
+        load_image(name, win_width, win_height);
+}
+
+void last()
+{
+    char *name;
+    if ((name = get_last_file()) != NULL)
+        load_image(name, win_width, win_height);
+}
+
+static gboolean key_press(GtkWindow *window, GdkEvent *event, gpointer data)
+{
     switch (event->key.keyval) {
     case GDK_KEY_q:
         g_application_quit(
@@ -38,24 +65,20 @@ static gboolean key_press(GtkWindow *window, GdkEvent *event, gpointer data)
     case GDK_KEY_n:
     case GDK_KEY_j:
     case GDK_KEY_Right:
-        if ((name = get_next_file()) != NULL)
-            load_image(name, win_width, win_height);
+        next();
         return FALSE;
     case GDK_KEY_p:
     case GDK_KEY_k:
     case GDK_KEY_Left:
-        if ((name = get_prev_file()) != NULL)
-            load_image(name, win_width, win_height);
+        prev();
         return FALSE;
     case GDK_KEY_g:
     case GDK_KEY_Home:
-        if ((name = get_first_file()) != NULL)
-            load_image(name, win_width, win_height);
+        first();
         return FALSE;
     case GDK_KEY_G:
     case GDK_KEY_End:
-        if ((name = get_last_file()) != NULL)
-            load_image(name, win_width, win_height);
+        last();
         return FALSE;
     default:
         return TRUE;
@@ -66,15 +89,28 @@ gboolean scroll_callback(GtkWindow *window, GdkEvent *event, gpointer data)
 {
     GdkModifierType state;
     gdk_event_get_state(event, &state);
-    if (state & GDK_CONTROL_MASK && event->scroll.direction == GDK_SCROLL_UP) {
-        zoom(1);
-        curr_scale_mod = zoomed;
+
+    switch (event->scroll.direction) {
+    case GDK_SCROLL_UP:
+        if (state & GDK_CONTROL_MASK) {
+            zoom(1);
+            curr_scale_mod = zoomed;
+        } else {
+            next();
+        }
         return FALSE;
-    } else if (state & GDK_CONTROL_MASK &&
-               event->scroll.direction == GDK_SCROLL_DOWN) {
-        zoom(-1);
-        curr_scale_mod = zoomed;
+        break;
+    case GDK_SCROLL_DOWN:
+        if (state & GDK_CONTROL_MASK) {
+            zoom(1);
+            curr_scale_mod = zoomed;
+        } else {
+            prev();
+        }
         return FALSE;
+        break;
+    default:
+        break;
     }
     return TRUE;
 }