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https://github.com/LadybirdBrowser/ladybird.git
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dc3de47b03
We use this to automatically update the thumbnail in LayerListWidget when you draw into a layer. We also use it to repaint the ImageEditor when the image changes somehow. :^)
130 lines
4.0 KiB
C++
130 lines
4.0 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 "SprayTool.h"
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#include "ImageEditor.h"
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#include "Layer.h"
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#include <AK/Queue.h>
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#include <AK/SinglyLinkedList.h>
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#include <LibGUI/Action.h>
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#include <LibGUI/Menu.h>
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#include <LibGUI/Painter.h>
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#include <LibGfx/Bitmap.h>
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#include <LibM/math.h>
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#include <stdio.h>
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namespace PixelPaint {
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SprayTool::SprayTool()
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{
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m_timer = Core::Timer::construct();
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m_timer->on_timeout = [&]() {
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paint_it();
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};
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m_timer->set_interval(200);
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}
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SprayTool::~SprayTool()
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{
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}
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static double nrand()
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{
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return double(rand()) / double(RAND_MAX);
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}
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void SprayTool::paint_it()
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{
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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& bitmap = layer->bitmap();
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GUI::Painter painter(bitmap);
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ASSERT(bitmap.bpp() == 32);
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m_editor->update();
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const double minimal_radius = 10;
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const double base_radius = minimal_radius * m_thickness;
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for (int i = 0; i < 100 + (nrand() * 800); i++) {
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double radius = base_radius * nrand();
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double angle = 2 * M_PI * nrand();
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const int xpos = m_last_pos.x() + radius * cos(angle);
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const int ypos = m_last_pos.y() - radius * sin(angle);
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if (xpos < 0 || xpos >= bitmap.width())
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continue;
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if (ypos < 0 || ypos >= bitmap.height())
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continue;
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bitmap.set_pixel<Gfx::BitmapFormat::RGB32>(xpos, ypos, m_color);
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}
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layer->did_modify_bitmap(*m_editor->image());
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}
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void SprayTool::on_mousedown(Layer&, GUI::MouseEvent& event, GUI::MouseEvent&)
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{
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m_color = m_editor->color_for(event);
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m_last_pos = event.position();
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m_timer->start();
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paint_it();
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}
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void SprayTool::on_mousemove(Layer&, GUI::MouseEvent& event, GUI::MouseEvent&)
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{
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m_last_pos = event.position();
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if (m_timer->is_active()) {
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paint_it();
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m_timer->restart(m_timer->interval());
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}
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}
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void SprayTool::on_mouseup(Layer&, GUI::MouseEvent&, GUI::MouseEvent&)
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{
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m_timer->stop();
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}
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void SprayTool::on_tool_button_contextmenu(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_thickness_actions.set_exclusive(true);
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auto insert_action = [&](int size, bool checked = false) {
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auto action = GUI::Action::create_checkable(String::number(size), [this, size](auto&) {
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m_thickness = size;
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});
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action->set_checked(checked);
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m_thickness_actions.add_action(*action);
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m_context_menu->add_action(move(action));
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};
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insert_action(1, true);
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insert_action(2);
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insert_action(3);
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insert_action(4);
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}
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m_context_menu->popup(event.screen_position());
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}
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}
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