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