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#include <LibGUI/GBoxLayout.h>
#include <LibGUI/GSplitter.h>
#include <LibGUI/GWindow.h>
GSplitter::GSplitter(Orientation orientation, GWidget* parent)
: GFrame(parent)
, m_orientation(orientation)
{
set_layout(make<GBoxLayout>(orientation));
set_fill_with_background_color(true);
set_background_color(Color::WarmGray);
layout()->set_spacing(3);
}
GSplitter::~GSplitter()
{
}
void GSplitter::enter_event(CEvent&)
{
set_background_color(StylePainter::hover_highlight_color());
window()->set_override_cursor(m_orientation == Orientation::Horizontal ? GStandardCursor::ResizeHorizontal : GStandardCursor::ResizeVertical);
update();
}
void GSplitter::leave_event(CEvent&)
{
set_background_color(Color::WarmGray);
if (!m_resizing)
window()->set_override_cursor(GStandardCursor::None);
update();
}
void GSplitter::mousedown_event(GMouseEvent& event)
{
if (event.button() != GMouseButton::Left)
return;
m_resizing = true;
int x_or_y = event.position().primary_offset_for_orientation(m_orientation);
GWidget* first_resizee { nullptr };
GWidget* second_resizee { nullptr };
int fudge = layout()->spacing();
for_each_child_widget([&](auto& child) {
int child_start = child.relative_rect().first_edge_for_orientation(m_orientation);
int child_end = child.relative_rect().last_edge_for_orientation(m_orientation);
if (x_or_y > child_end && (x_or_y - fudge) <= child_end)
first_resizee = &child;
if (x_or_y < child_start && (x_or_y + fudge) >= child_start)
second_resizee = &child;
return IterationDecision::Continue;
});
ASSERT(first_resizee && second_resizee);
m_first_resizee = first_resizee->make_weak_ptr();
m_second_resizee = second_resizee->make_weak_ptr();
m_first_resizee_start_size = first_resizee->size();
m_second_resizee_start_size = second_resizee->size();
m_resize_origin = event.position();
}
void GSplitter::mousemove_event(GMouseEvent& event)
{
if (!m_resizing)
return;
auto delta = event.position() - m_resize_origin;
if (!m_first_resizee || !m_second_resizee) {
// One or both of the resizees were deleted during an ongoing resize, screw this.
m_resizing = false;
return;
}
int minimum_size = 0;
auto new_first_resizee_size = m_first_resizee_start_size;
auto new_second_resizee_size = m_second_resizee_start_size;
new_first_resizee_size.set_primary_size_for_orientation(m_orientation, new_first_resizee_size.primary_size_for_orientation(m_orientation) + delta.primary_offset_for_orientation(m_orientation));
new_second_resizee_size.set_primary_size_for_orientation(m_orientation, new_second_resizee_size.primary_size_for_orientation(m_orientation) - delta.primary_offset_for_orientation(m_orientation));
if (new_first_resizee_size.primary_size_for_orientation(m_orientation) < minimum_size) {
int correction = minimum_size - new_first_resizee_size.primary_size_for_orientation(m_orientation);
new_first_resizee_size.set_primary_size_for_orientation(m_orientation, new_first_resizee_size.primary_size_for_orientation(m_orientation) + correction);
new_second_resizee_size.set_primary_size_for_orientation(m_orientation, new_second_resizee_size.primary_size_for_orientation(m_orientation) - correction);
}
if (new_second_resizee_size.primary_size_for_orientation(m_orientation) < minimum_size) {
int correction = minimum_size - new_second_resizee_size.primary_size_for_orientation(m_orientation);
new_second_resizee_size.set_primary_size_for_orientation(m_orientation, new_second_resizee_size.primary_size_for_orientation(m_orientation) + correction);
new_first_resizee_size.set_primary_size_for_orientation(m_orientation, new_first_resizee_size.primary_size_for_orientation(m_orientation) - correction);
}
m_first_resizee->set_preferred_size(new_first_resizee_size);
m_second_resizee->set_preferred_size(new_second_resizee_size);
m_first_resizee->set_size_policy(m_orientation, SizePolicy::Fixed);
m_second_resizee->set_size_policy(m_orientation, SizePolicy::Fill);
invalidate_layout();
}
void GSplitter::mouseup_event(GMouseEvent& event)
{
if (event.button() != GMouseButton::Left)
return;
m_resizing = false;
if (!rect().contains(event.position()))
window()->set_override_cursor(GStandardCursor::None);
}
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