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authorMilan Crha <mcrha@redhat.com>2012-05-15 22:23:10 +0800
committerMilan Crha <mcrha@redhat.com>2012-05-15 22:24:29 +0800
commit5e379370ae0653c229308e1d7af31a54739ccc7e (patch)
treea9079e286e9e6a006d58ffa064d53d50091aab03 /widgets
parent0f7f848300bb2282cde20777c26168bdffe2d955 (diff)
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Bug #671585 - Add support for smooth scrolling devices
Diffstat (limited to 'widgets')
-rw-r--r--widgets/misc/e-web-view-gtkhtml.c22
-rw-r--r--widgets/misc/e-web-view.c22
2 files changed, 42 insertions, 2 deletions
diff --git a/widgets/misc/e-web-view-gtkhtml.c b/widgets/misc/e-web-view-gtkhtml.c
index be8b1c596f..bca66a72a3 100644
--- a/widgets/misc/e-web-view-gtkhtml.c
+++ b/widgets/misc/e-web-view-gtkhtml.c
@@ -852,7 +852,27 @@ web_view_gtkhtml_scroll_event (GtkWidget *widget,
GdkEventScroll *event)
{
if (event->state & GDK_CONTROL_MASK) {
- switch (event->direction) {
+ GdkScrollDirection direction = event->direction;
+
+ #if GTK_CHECK_VERSION(3,3,18)
+ if (direction == GDK_SCROLL_SMOOTH) {
+ static gdouble total_delta_y = 0.0;
+
+ total_delta_y += event->delta_y;
+
+ if (total_delta_y >= 1.0) {
+ total_delta_y = 0.0;
+ direction = GDK_SCROLL_DOWN;
+ } else if (total_delta_y <= -1.0) {
+ total_delta_y = 0.0;
+ direction = GDK_SCROLL_UP;
+ } else {
+ return FALSE;
+ }
+ }
+ #endif
+
+ switch (direction) {
case GDK_SCROLL_UP:
gtk_html_zoom_in (GTK_HTML (widget));
return TRUE;
diff --git a/widgets/misc/e-web-view.c b/widgets/misc/e-web-view.c
index f58b5d44de..07f8357609 100644
--- a/widgets/misc/e-web-view.c
+++ b/widgets/misc/e-web-view.c
@@ -969,7 +969,27 @@ web_view_scroll_event (GtkWidget *widget,
GdkEventScroll *event)
{
if (event->state & GDK_CONTROL_MASK) {
- switch (event->direction) {
+ GdkScrollDirection direction = event->direction;
+
+ #if GTK_CHECK_VERSION(3,3,18)
+ if (direction == GDK_SCROLL_SMOOTH) {
+ static gdouble total_delta_y = 0.0;
+
+ total_delta_y += event->delta_y;
+
+ if (total_delta_y >= 1.0) {
+ total_delta_y = 0.0;
+ direction = GDK_SCROLL_DOWN;
+ } else if (total_delta_y <= -1.0) {
+ total_delta_y = 0.0;
+ direction = GDK_SCROLL_UP;
+ } else {
+ return FALSE;
+ }
+ }
+ #endif
+
+ switch (direction) {
case GDK_SCROLL_UP:
e_web_view_zoom_in (E_WEB_VIEW (widget));
return TRUE;