Improvements to scroll handling

4 files changed, 28 insertions, 15 deletions

diff --git a/scene/gui/item_list.cpp b/scene/gui/item_list.cpp
index 026374ded1..406c8e4f48 100644
--- a/scene/gui/item_list.cpp
+++ b/scene/gui/item_list.cpp
@@ -470,6 +470,8 @@ Size2 ItemList::Item::get_icon_size() const {
 
 void ItemList::_gui_input(const Ref<InputEvent> &p_event) {
 
+	double prev_scroll = scroll_bar->get_value();
+
 	Ref<InputEventMouseMotion> mm = p_event;
 	if (defer_select_single >= 0 && mm.is_valid()) {
 		defer_select_single = -1;
@@ -767,6 +769,9 @@ void ItemList::_gui_input(const Ref<InputEvent> &p_event) {
 
 		scroll_bar->set_value(scroll_bar->get_value() + scroll_bar->get_page() * pan_gesture->get_delta().y / 8);
 	}
+
+	if (scroll_bar->get_value() != prev_scroll)
+		accept_event(); //accept event if scroll changed
 }
 
 void ItemList::ensure_current_is_visible() {
diff --git a/scene/gui/scroll_bar.cpp b/scene/gui/scroll_bar.cpp
index 2938654ed9..686d1c96cc 100644
--- a/scene/gui/scroll_bar.cpp
+++ b/scene/gui/scroll_bar.cpp
@@ -53,29 +53,19 @@ void ScrollBar::_gui_input(Ref<InputEvent> p_event) {
 	if (b.is_valid()) {
 		accept_event();
 
-		if (b->get_button_index() == 5 && b->is_pressed()) {
+		if (b->get_button_index() == BUTTON_WHEEL_DOWN && b->is_pressed()) {
 
-			/*
-			if (orientation==VERTICAL)
-				set_val( get_val() + get_page() / 4.0 );
-			else
-			*/
 			set_value(get_value() + get_page() / 4.0);
 			accept_event();
 		}
 
-		if (b->get_button_index() == 4 && b->is_pressed()) {
+		if (b->get_button_index() == BUTTON_WHEEL_UP && b->is_pressed()) {
 
-			/*
-			if (orientation==HORIZONTAL)
-				set_val( get_val() - get_page() / 4.0 );
-			else
-			*/
 			set_value(get_value() - get_page() / 4.0);
 			accept_event();
 		}
 
-		if (b->get_button_index() != 1)
+		if (b->get_button_index() != BUTTON_LEFT)
 			return;
 
 		if (b->is_pressed()) {
diff --git a/scene/gui/scroll_container.cpp b/scene/gui/scroll_container.cpp
index e50a71b0ff..a1034937b5 100644
--- a/scene/gui/scroll_container.cpp
+++ b/scene/gui/scroll_container.cpp
@@ -88,13 +88,16 @@ void ScrollContainer::_cancel_drag() {
 
 void ScrollContainer::_gui_input(const Ref<InputEvent> &p_gui_input) {
 
+	double prev_v_scroll = v_scroll->get_value();
+	double prev_h_scroll = h_scroll->get_value();
+
 	Ref<InputEventMouseButton> mb = p_gui_input;
 
 	if (mb.is_valid()) {
 
 		if (mb->get_button_index() == BUTTON_WHEEL_UP && mb->is_pressed()) {
 			// only horizontal is enabled, scroll horizontally
-			if (h_scroll->is_visible() && !v_scroll->is_visible()) {
+			if (h_scroll->is_visible() && (!v_scroll->is_visible() || mb->get_shift())) {
 				h_scroll->set_value(h_scroll->get_value() - h_scroll->get_page() / 8 * mb->get_factor());
 			} else if (v_scroll->is_visible_in_tree()) {
 				v_scroll->set_value(v_scroll->get_value() - v_scroll->get_page() / 8 * mb->get_factor());
@@ -103,7 +106,7 @@ void ScrollContainer::_gui_input(const Ref<InputEvent> &p_gui_input) {
 
 		if (mb->get_button_index() == BUTTON_WHEEL_DOWN && mb->is_pressed()) {
 			// only horizontal is enabled, scroll horizontally
-			if (h_scroll->is_visible() && !v_scroll->is_visible()) {
+			if (h_scroll->is_visible() && (!v_scroll->is_visible() || mb->get_shift())) {
 				h_scroll->set_value(h_scroll->get_value() + h_scroll->get_page() / 8 * mb->get_factor());
 			} else if (v_scroll->is_visible()) {
 				v_scroll->set_value(v_scroll->get_value() + v_scroll->get_page() / 8 * mb->get_factor());
@@ -122,6 +125,9 @@ void ScrollContainer::_gui_input(const Ref<InputEvent> &p_gui_input) {
 			}
 		}
 
+		if (v_scroll->get_value() != prev_v_scroll || h_scroll->get_value() != prev_h_scroll)
+			accept_event(); //accept event if scroll changed
+
 		if (!OS::get_singleton()->has_touchscreen_ui_hint())
 			return;
 
@@ -204,6 +210,9 @@ void ScrollContainer::_gui_input(const Ref<InputEvent> &p_gui_input) {
 			v_scroll->set_value(v_scroll->get_value() + v_scroll->get_page() * pan_gesture->get_delta().y / 8);
 		}
 	}
+
+	if (v_scroll->get_value() != prev_v_scroll || h_scroll->get_value() != prev_h_scroll)
+		accept_event(); //accept event if scroll changed
 }
 
 void ScrollContainer::_update_scrollbar_position() {
diff --git a/scene/gui/text_edit.cpp b/scene/gui/text_edit.cpp
index 1a000d8da5..332d1fc7c3 100644
--- a/scene/gui/text_edit.cpp
+++ b/scene/gui/text_edit.cpp
@@ -1812,6 +1812,9 @@ void TextEdit::_get_mouse_pos(const Point2i &p_mouse, int &r_row, int &r_col) co
 
 void TextEdit::_gui_input(const Ref<InputEvent> &p_gui_input) {
 
+	double prev_v_scroll = v_scroll->get_value();
+	double prev_h_scroll = h_scroll->get_value();
+
 	Ref<InputEventMouseButton> mb = p_gui_input;
 
 	if (mb.is_valid()) {
@@ -2066,6 +2069,9 @@ void TextEdit::_gui_input(const Ref<InputEvent> &p_gui_input) {
 			_scroll_down(delta);
 		}
 		h_scroll->set_value(h_scroll->get_value() + pan_gesture->get_delta().x * 100);
+		if (v_scroll->get_value() != prev_v_scroll || h_scroll->get_value() != prev_h_scroll)
+			accept_event(); //accept event if scroll changed
+
 		return;
 	}
 
@@ -2109,6 +2115,9 @@ void TextEdit::_gui_input(const Ref<InputEvent> &p_gui_input) {
 		}
 	}
 
+	if (v_scroll->get_value() != prev_v_scroll || h_scroll->get_value() != prev_h_scroll)
+		accept_event(); //accept event if scroll changed
+
 	Ref<InputEventKey> k = p_gui_input;
 
 	if (k.is_valid()) {