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LibGUI: Support drag-to-reorder in TabWidget

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This commit is contained in:
Peter Elliott 2021-10-07 01:52:04 -06:00 • committed by Andreas Kling
parent df674023d6
commit e1684860a3
3 changed files with 99 additions and 3 deletions
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90
Userland/Libraries/LibGUI/TabWidget.cpp
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@ -1,5 +1,6 @@
/*
* Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
* Copyright (c) 2021, Peter Elliott <pelliott@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
@ -198,7 +199,6 @@ void TabWidget::paint_event(PaintEvent& event)
Painter painter(*this);
painter.add_clip_rect(event.rect());
painter.fill_rect(event.rect(), palette().button());
if (!m_container_margins.is_null()) {
@ -250,11 +250,34 @@ void TabWidget::paint_event(PaintEvent& event)
painter.draw_text(tab_button_content_rect, m_tabs[i].title, m_text_alignment, palette().button_text(), Gfx::TextElision::Right);
}
if (m_close_button_enabled) {
for (size_t i = 0; i < m_tabs.size(); ++i) {
if (m_tabs[i].widget == m_active_widget)
continue;
bool hovered_close_button = i == m_hovered_close_button_index;
bool pressed_close_button = i == m_pressed_close_button_index;
auto close_button_rect = this->close_button_rect(i);
if (hovered_close_button)
Gfx::StylePainter::paint_frame(painter, close_button_rect, palette(), Gfx::FrameShape::Box, pressed_close_button ? Gfx::FrameShadow::Sunken : Gfx::FrameShadow::Raised, 1);
Gfx::IntRect icon_rect { close_button_rect.x() + 3, close_button_rect.y() + 3, 6, 6 };
painter.draw_line(icon_rect.top_left(), icon_rect.bottom_right(), palette().button_text());
painter.draw_line(icon_rect.top_right(), icon_rect.bottom_left(), palette().button_text());
}
}
for (size_t i = 0; i < m_tabs.size(); ++i) {
if (m_tabs[i].widget != m_active_widget)
continue;
bool hovered = i == m_hovered_tab_index;
auto button_rect = this->button_rect(i);
if (m_dragging_active_tab)
button_rect.set_x(m_mouse_x - m_grab_offset);
Gfx::StylePainter::paint_tab_button(painter, button_rect, palette(), true, hovered, m_tabs[i].widget->is_enabled(), m_tab_position == TabPosition::Top, window()->is_active());
// First we get rid of the 1px sheen on the left, then the 2px shadow
@ -295,10 +318,16 @@ void TabWidget::paint_event(PaintEvent& event)
return;
for (size_t i = 0; i < m_tabs.size(); ++i) {
if (m_tabs[i].widget != m_active_widget)
continue;
bool hovered_close_button = i == m_hovered_close_button_index;
bool pressed_close_button = i == m_pressed_close_button_index;
auto close_button_rect = this->close_button_rect(i);
if (m_dragging_active_tab)
close_button_rect.set_x((m_mouse_x - m_grab_offset) + (close_button_rect.x() - button_rect(i).x()));
if (hovered_close_button)
Gfx::StylePainter::paint_frame(painter, close_button_rect, palette(), Gfx::FrameShape::Box, pressed_close_button ? Gfx::FrameShadow::Sunken : Gfx::FrameShadow::Raised, 1);
@ -394,6 +423,7 @@ void TabWidget::mousedown_event(MouseEvent& event)
return;
}
set_active_widget(m_tabs[i].widget);
drag_tab(i);
} else if (event.button() == MouseButton::Middle) {
auto* widget = m_tabs[i].widget;
deferred_invoke([this, widget] {
@ -410,10 +440,16 @@ void TabWidget::mouseup_event(MouseEvent& event)
if (event.button() != MouseButton::Left)
return;
if (m_dragging_active_tab) {
m_dragging_active_tab = false;
update_bar();
}
if (!m_close_button_enabled || !m_pressed_close_button_index.has_value())
return;
auto close_button_rect = this->close_button_rect(m_pressed_close_button_index.value());
update_bar();
if (close_button_rect.contains(event.position())) {
auto* widget = m_tabs[m_pressed_close_button_index.value()].widget;
@ -422,7 +458,6 @@ void TabWidget::mouseup_event(MouseEvent& event)
on_tab_close_click(*widget);
});
}
m_pressed_close_button_index = {};
}
@ -431,6 +466,13 @@ void TabWidget::mousemove_event(MouseEvent& event)
Optional<size_t> hovered_tab = {};
Optional<size_t> hovered_close_button = {};
m_mouse_x = event.position().x();
if (m_dragging_active_tab) {
recalculate_tab_order();
update_bar();
return;
}
for (size_t i = 0; i < m_tabs.size(); ++i) {
auto button_rect = this->button_rect(i);
auto close_button_rect = this->close_button_rect(i);
@ -466,7 +508,6 @@ void TabWidget::update_bar()
return;
auto invalidation_rect = bar_rect();
invalidation_rect.set_height(invalidation_rect.height() + 1);
invalidation_rect.set_right(button_rect(m_tabs.size() - 1).right());
update(invalidation_rect);
}
@ -587,4 +628,47 @@ void TabWidget::set_container_margins(GUI::Margins const& margins)
update();
}
void TabWidget::drag_tab(size_t index)
{
m_dragging_active_tab = m_reorder_allowed;
m_grab_offset = m_mouse_x - button_rect(index).x();
m_hovered_tab_index = {};
m_hovered_close_button_index = {};
}
void TabWidget::recalculate_tab_order()
{
if (!m_dragging_active_tab)
return;
size_t active;
for (active = 0; active < m_tabs.size(); ++active) {
if (m_tabs[active].widget == m_active_widget)
break;
}
size_t target;
for (target = 0; target < active; ++target) {
auto button_rect = this->button_rect(target);
if ((m_mouse_x - m_grab_offset) < button_rect.x()) {
break;
}
}
if (target == active) {
for (target = m_tabs.size() - 1; target > active; --target) {
auto button_rect = this->button_rect(target);
if ((m_mouse_x - m_grab_offset) > button_rect.x()) {
break;
}
}
}
if (active == target)
return;
auto tab = m_tabs.take(active);
m_tabs.insert(target, tab);
update_bar();
}
}