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https://github.com/LadybirdBrowser/ladybird.git
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1c27568ab0
The most used feature of any image editor, undo. Each tool now notifies the ImageEditor that they completed an action, where it'll take a snapshot if its current state. For now, a snapshot is just a copy of the whole image and its layers. There's a hard limit on the amount of actions it stores.
139 lines
4.6 KiB
C++
139 lines
4.6 KiB
C++
/*
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* Copyright (c) 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 "MoveTool.h"
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#include "Image.h"
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#include "ImageEditor.h"
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#include "Layer.h"
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#include <LibGUI/Action.h>
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#include <LibGUI/Menu.h>
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#include <LibGUI/Window.h>
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#include <LibGfx/Bitmap.h>
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namespace PixelPaint {
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MoveTool::MoveTool()
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{
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}
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MoveTool::~MoveTool()
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{
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}
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void MoveTool::on_mousedown(Layer& layer, GUI::MouseEvent& event, GUI::MouseEvent& image_event)
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{
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if (event.button() != GUI::MouseButton::Left)
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return;
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if (!layer.rect().contains(event.position()))
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return;
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m_layer_being_moved = layer;
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m_event_origin = image_event.position();
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m_layer_origin = layer.location();
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m_editor->window()->set_cursor(Gfx::StandardCursor::Move);
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}
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void MoveTool::on_mousemove(Layer&, GUI::MouseEvent&, GUI::MouseEvent& image_event)
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{
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if (!m_layer_being_moved)
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return;
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auto delta = image_event.position() - m_event_origin;
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m_layer_being_moved->set_location(m_layer_origin.translated(delta));
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m_editor->layers_did_change();
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}
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void MoveTool::on_mouseup(Layer&, GUI::MouseEvent& event, GUI::MouseEvent&)
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{
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if (event.button() != GUI::MouseButton::Left)
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return;
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m_layer_being_moved = nullptr;
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m_editor->window()->set_cursor(Gfx::StandardCursor::None);
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m_editor->did_complete_action();
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}
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void MoveTool::on_keydown(GUI::KeyEvent& event)
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{
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if (event.modifiers() != 0)
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return;
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auto* layer = m_editor->active_layer();
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if (!layer)
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return;
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auto new_location = layer->location();
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switch (event.key()) {
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case Key_Up:
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new_location.move_by(0, -1);
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break;
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case Key_Down:
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new_location.move_by(0, 1);
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break;
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case Key_Left:
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new_location.move_by(-1, 0);
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break;
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case Key_Right:
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new_location.move_by(1, 0);
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break;
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default:
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return;
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}
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layer->set_location(new_location);
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m_editor->layers_did_change();
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}
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void MoveTool::on_context_menu(Layer& layer, GUI::ContextMenuEvent& event)
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{
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if (!m_context_menu) {
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m_context_menu = GUI::Menu::construct();
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m_context_menu->add_action(GUI::CommonActions::make_move_to_front_action(
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[this](auto&) {
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m_editor->image()->move_layer_to_front(*m_context_menu_layer);
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m_editor->layers_did_change();
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},
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m_editor));
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m_context_menu->add_action(GUI::CommonActions::make_move_to_back_action(
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[this](auto&) {
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m_editor->image()->move_layer_to_back(*m_context_menu_layer);
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m_editor->layers_did_change();
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},
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m_editor));
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m_context_menu->add_separator();
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m_context_menu->add_action(GUI::Action::create(
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"Delete layer", Gfx::Bitmap::load_from_file("/res/icons/16x16/delete.png"), [this](auto&) {
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m_editor->image()->remove_layer(*m_context_menu_layer);
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// FIXME: This should not be done imperatively here. Perhaps a Image::Client interface that ImageEditor can implement?
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if (m_editor->active_layer() == m_context_menu_layer)
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m_editor->set_active_layer(nullptr);
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m_editor->layers_did_change();
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},
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m_editor));
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}
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m_context_menu_layer = layer;
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m_context_menu->popup(event.screen_position());
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}
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}
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