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Allow popup menu scrolling without mouse wheel

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This commit is contained in:
Bernhard Liebl 2018-01-06 16:21:27 +01:00
parent fab0d53f7e
commit 3f9a7da857
2 changed files with 28 additions and 32 deletions
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59
scene/gui/popup_menu.cpp
View file

@ -189,6 +189,26 @@ void PopupMenu::_submenu_timeout() {
submenu_over = -1;
}
void PopupMenu::_scroll(float p_factor, const Point2 &p_over) {
const float global_y = get_global_position().y;
int vseparation = get_constant("vseparation");
Ref<Font> font = get_font("font");
float dy = (vseparation + font->get_height()) * 3 * p_factor;
if (dy > 0 && global_y < 0)
dy = MIN(dy, -global_y - 1);
else if (dy < 0 && global_y + get_size().y > get_viewport_rect().size.y)
dy = -MIN(-dy, global_y + get_size().y - get_viewport_rect().size.y - 1);
set_position(get_position() + Vector2(0, dy));
Ref<InputEventMouseMotion> ie;
ie.instance();
ie->set_position(p_over - Vector2(0, dy));
_gui_input(ie);
}
void PopupMenu::_gui_input(const Ref<InputEvent> &p_event) {
Ref<InputEventKey> k = p_event;
@ -285,41 +305,11 @@ void PopupMenu::_gui_input(const Ref<InputEvent> &p_event) {
case BUTTON_WHEEL_DOWN: {
if (get_global_position().y + get_size().y > get_viewport_rect().size.y) {
int vseparation = get_constant("vseparation");
Ref<Font> font = get_font("font");
Point2 pos = get_position();
int s = (vseparation + font->get_height()) * 3;
pos.y -= (s * b->get_factor());
set_position(pos);
//update hover
Ref<InputEventMouseMotion> ie;
ie.instance();
ie->set_position(b->get_position() + Vector2(0, s));
_gui_input(ie);
}
_scroll(-b->get_factor(), b->get_position());
} break;
case BUTTON_WHEEL_UP: {
if (get_global_position().y < 0) {
int vseparation = get_constant("vseparation");
Ref<Font> font = get_font("font");
Point2 pos = get_position();
int s = (vseparation + font->get_height()) * 3;
pos.y += (s * b->get_factor());
set_position(pos);
//update hover
Ref<InputEventMouseMotion> ie;
ie.instance();
ie->set_position(b->get_position() - Vector2(0, s));
_gui_input(ie);
}
_scroll(b->get_factor(), b->get_position());
} break;
case BUTTON_LEFT: {
@ -387,6 +377,11 @@ void PopupMenu::_gui_input(const Ref<InputEvent> &p_event) {
update();
}
}
Ref<InputEventPanGesture> pan_gesture = p_event;
if (pan_gesture.is_valid()) {
_scroll(-pan_gesture->get_delta().y, pan_gesture->get_position());
}
}
bool PopupMenu::has_point(const Point2 &p_point) const {

1
scene/gui/popup_menu.h
View file

@ -84,6 +84,7 @@ class PopupMenu : public Popup {
String _get_accel_text(int p_item) const;
int _get_mouse_over(const Point2 &p_over) const;
virtual Size2 get_minimum_size() const;
void _scroll(float p_factor, const Point2 &p_over);
void _gui_input(const Ref<InputEvent> &p_event);
void _activate_submenu(int over);
void _submenu_timeout();