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WindowServer: Simplify WSMenu MouseWheel event

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A mouse move event needs to do a bit more work than what a mouse wheel event
does. Mouse wheel just needs to update the hovered item, and update for a new
hovered item. This also stops us from calling redraw() twice on a wheel event.
This commit is contained in:
Shannon Booth 2020-01-20 22:03:57 +13:00 • committed by Andreas Kling
parent 3e05c83591
commit 68d5b39942
2 changed files with 12 additions and 11 deletions
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21
Servers/WindowServer/WSMenu.cpp
View file

@ -300,11 +300,9 @@ void WSMenu::decend_into_submenu_at_hovered_item()
m_in_submenu = true;
}
void WSMenu::handle_hover_event(const WSMouseEvent& event)
void WSMenu::handle_mouse_move_event(const WSMouseEvent& mouse_event)
{
ASSERT(menu_window());
auto mouse_event = static_cast<const WSMouseEvent&>(event);
if (hovered_item() && hovered_item()->is_submenu()) {
auto item = *hovered_item();
@ -333,7 +331,7 @@ void WSMenu::handle_hover_event(const WSMouseEvent& event)
void WSMenu::event(CEvent& event)
{
if (event.type() == WSEvent::MouseMove) {
handle_hover_event(static_cast<const WSMouseEvent&>(event));
handle_mouse_move_event(static_cast<const WSMouseEvent&>(event));
return;
}
@ -343,14 +341,17 @@ void WSMenu::event(CEvent& event)
}
if (event.type() == WSEvent::MouseWheel && is_scrollable()) {
ASSERT(menu_window());
auto& mouse_event = static_cast<const WSMouseEvent&>(event);
m_scroll_offset += mouse_event.wheel_delta();
if (m_scroll_offset < 0)
m_scroll_offset = 0;
if (m_scroll_offset >= m_max_scroll_offset)
m_scroll_offset = m_max_scroll_offset;
handle_hover_event(mouse_event);
redraw();
m_scroll_offset = clamp(m_scroll_offset, 0, m_max_scroll_offset);
int index = item_index_at(mouse_event.position());
if (m_hovered_item_index == index)
return;
m_hovered_item_index = index;
update_for_new_hovered_item();
return;
}

2
Servers/WindowServer/WSMenu.h
View file

@ -117,7 +117,7 @@ public:
private:
virtual void event(CEvent&) override;
void handle_hover_event(const WSMouseEvent&);
void handle_mouse_move_event(const WSMouseEvent&);
int visible_item_count() const;
int item_index_at(const Point&);