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LibGUI: Allow ComboBox windows to intersect Desktop's entire height

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Minus a tasteful item height remainder. Ignoring Taskbar is okay now
that the window is a PopUp.

Also expands its width if intersection with the Desktop makes its
ListView scrollable. ComboBox windows no longer intersect horizontally,
remaining firmly "attached" to the editor, similar to other classic UIs.
This commit is contained in:
thankyouverycool 2023-04-02 13:26:11 -04:00 committed by Andreas Kling
parent 99f28cf4ac
commit 82c06f58af
Notes: sideshowbarker 2024-07-17 01:10:58 +09:00 
Author: https://github.com/thankyouverycool
Commit: https://github.com/SerenityOS/serenity/commit/82c06f58af
Pull-request: https://github.com/SerenityOS/serenity/pull/18177
1 changed files with 15 additions and 3 deletions
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18
Userland/Libraries/LibGUI/ComboBox.cpp
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@ -245,17 +245,29 @@ void ComboBox::open()
auto frame = m_list_view->frame_thickness() * 2;
auto max_height = min(m_list_view->item_height() * m_max_visible_items, m_list_view->content_height());
Gfx::IntSize size { max(width(), m_list_view->content_width() + frame), max_height + frame };
auto min_width = m_list_view->content_width() + frame;
Gfx::IntSize size { max(width(), min_width), max_height + frame };
Gfx::IntRect rect { screen_relative_rect().bottom_left(), size };
auto desktop = Desktop::the().rect().shrunken(0, 0, Desktop::the().taskbar_height(), 0);
auto desktop = Desktop::the().rect();
auto min_height = 5 * m_list_view->item_height() + frame;
auto go_upwards_instead = rect.bottom() >= desktop.height() && rect.intersected(desktop).height() < min_height;
if (go_upwards_instead) {
auto origin = screen_relative_rect().top_left();
rect = { Gfx::IntPoint { origin.x(), origin.y() - size.height() }, size };
}
rect.intersect(desktop);
auto intersection = rect.intersected(desktop);
rect.set_top(intersection.top());
rect.set_bottom(intersection.bottom());
auto remainder = (rect.height() - frame) % m_list_view->item_height();
go_upwards_instead ? rect.take_from_top(remainder) : rect.take_from_bottom(remainder);
auto scrollbar_width = m_list_view->vertical_scrollbar().width();
if (max_height > rect.height() && width() < min_width + scrollbar_width)
rect.set_width(rect.width() + scrollbar_width);
m_list_window->set_rect(rect);
m_list_view->set_min_size(rect.size());