5f9906f188
We need to skip over widgets that are not visible as the layout does not update their location. This fixes finding the correct widgets surrounding the splitter. Fixes #3491
211 lines
8.2 KiB
C++
211 lines
8.2 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <LibGUI/BoxLayout.h>
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#include <LibGUI/Painter.h>
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#include <LibGUI/Splitter.h>
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#include <LibGUI/Window.h>
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#include <LibGfx/Palette.h>
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namespace GUI {
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Splitter::Splitter(Orientation orientation)
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: m_orientation(orientation)
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{
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set_background_role(ColorRole::Button);
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set_layout<BoxLayout>(orientation);
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set_fill_with_background_color(true);
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layout()->set_spacing(3);
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}
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Splitter::~Splitter()
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{
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}
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void Splitter::paint_event(PaintEvent& event)
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{
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Painter painter(*this);
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painter.add_clip_rect(event.rect());
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painter.fill_rect(m_grabbable_rect, palette().hover_highlight());
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}
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void Splitter::resize_event(ResizeEvent& event)
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{
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Widget::resize_event(event);
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m_grabbable_rect = {};
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}
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void Splitter::override_cursor(bool do_override)
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{
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if (do_override) {
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if (!m_overriding_cursor) {
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set_override_cursor(m_orientation == Orientation::Horizontal ? Gfx::StandardCursor::ResizeColumn : Gfx::StandardCursor::ResizeRow);
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m_overriding_cursor = true;
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}
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} else {
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if (m_overriding_cursor) {
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set_override_cursor(Gfx::StandardCursor::None);
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m_overriding_cursor = false;
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}
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}
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}
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void Splitter::leave_event(Core::Event&)
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{
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if (!m_resizing)
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override_cursor(false);
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if (!m_grabbable_rect.is_empty()) {
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m_grabbable_rect = {};
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update();
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}
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}
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bool Splitter::get_resize_candidates_at(const Gfx::IntPoint& position, Widget*& first, Widget*& second)
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{
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int x_or_y = position.primary_offset_for_orientation(m_orientation);
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Widget* previous_widget = nullptr;
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bool found_candidates = false;
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for_each_child_widget([&](auto& child_widget) {
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if (!child_widget.is_visible()) {
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// We need to skip over widgets that are not visible as they
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// are not necessarily in the correct location (anymore)
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return IterationDecision::Continue;
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}
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if (!previous_widget) {
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previous_widget = &child_widget;
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return IterationDecision::Continue;
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}
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if (x_or_y > previous_widget->content_rect().last_edge_for_orientation(m_orientation)
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&& x_or_y <= child_widget.content_rect().first_edge_for_orientation(m_orientation)) {
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first = previous_widget;
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second = &child_widget;
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found_candidates = true;
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return IterationDecision::Break;
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}
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return IterationDecision::Continue;
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});
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return found_candidates;
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}
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void Splitter::mousedown_event(MouseEvent& event)
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{
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if (event.button() != MouseButton::Left)
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return;
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m_resizing = true;
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Widget* first { nullptr };
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Widget* second { nullptr };
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if (!get_resize_candidates_at(event.position(), first, second))
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return;
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m_first_resizee = first->make_weak_ptr();
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m_second_resizee = second->make_weak_ptr();
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m_first_resizee_start_size = first->size();
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m_second_resizee_start_size = second->size();
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m_resize_origin = event.position();
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}
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void Splitter::recompute_grabbable_rect(const Widget& first, const Widget& second)
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{
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auto first_edge = first.content_rect().primary_offset_for_orientation(m_orientation) + first.content_rect().primary_size_for_orientation(m_orientation);
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auto second_edge = second.content_rect().primary_offset_for_orientation(m_orientation);
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Gfx::IntRect rect;
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rect.set_primary_offset_for_orientation(m_orientation, first_edge);
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rect.set_primary_size_for_orientation(m_orientation, second_edge - first_edge);
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rect.set_secondary_offset_for_orientation(m_orientation, first.content_rect().secondary_offset_for_orientation(m_orientation));
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rect.set_secondary_size_for_orientation(m_orientation, first.content_rect().secondary_size_for_orientation(m_orientation));
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if (m_grabbable_rect != rect) {
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m_grabbable_rect = rect;
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update();
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}
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}
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void Splitter::mousemove_event(MouseEvent& event)
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{
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if (!m_resizing) {
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Widget* first { nullptr };
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Widget* second { nullptr };
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if (!get_resize_candidates_at(event.position(), first, second)) {
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override_cursor(false);
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return;
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}
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recompute_grabbable_rect(*first, *second);
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override_cursor(m_grabbable_rect.contains(event.position()));
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return;
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}
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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 Splitter::did_layout()
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{
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if (m_first_resizee && m_second_resizee)
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recompute_grabbable_rect(*m_first_resizee, *m_second_resizee);
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}
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void Splitter::mouseup_event(MouseEvent& event)
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{
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if (event.button() != MouseButton::Left)
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return;
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m_resizing = false;
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m_first_resizee = nullptr;
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m_second_resizee = nullptr;
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if (!rect().contains(event.position()))
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set_override_cursor(Gfx::StandardCursor::None);
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}
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}
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