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705cee528a
This patch adds GUI::Action::create_checkable() helpers that work just like the existing create() helpers, but the actions become checkable(!) Clients are no longer required to manage the checked state of their actions manually, but instead they will be checked/unchecked as needed by GUI::Action itself before the activation hook is fired.
112 lines
4.0 KiB
C++
112 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 "EraseTool.h"
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#include "PaintableWidget.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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EraseTool::EraseTool()
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{
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}
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EraseTool::~EraseTool()
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{
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}
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Gfx::Rect EraseTool::build_rect(const Gfx::Point& pos, const Gfx::Rect& widget_rect)
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{
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const int base_eraser_size = 10;
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const int eraser_size = (base_eraser_size * m_thickness);
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const int eraser_radius = eraser_size / 2;
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const auto ex = pos.x();
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const auto ey = pos.y();
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return Gfx::Rect(ex - eraser_radius, ey - eraser_radius, eraser_size, eraser_size).intersected(widget_rect);
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}
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void EraseTool::on_mousedown(GUI::MouseEvent& event)
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{
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if (event.button() != GUI::MouseButton::Left && event.button() != GUI::MouseButton::Right)
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return;
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Gfx::Rect r = build_rect(event.position(), m_widget->bitmap().rect());
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GUI::Painter painter(m_widget->bitmap());
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painter.clear_rect(r, get_color());
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m_widget->update();
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}
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void EraseTool::on_mousemove(GUI::MouseEvent& event)
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{
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if (!m_widget->rect().contains(event.position()))
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return;
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if (event.buttons() & GUI::MouseButton::Left || event.buttons() & GUI::MouseButton::Right) {
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Gfx::Rect r = build_rect(event.position(), m_widget->bitmap().rect());
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GUI::Painter painter(m_widget->bitmap());
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painter.clear_rect(r, get_color());
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m_widget->update();
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}
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}
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void EraseTool::on_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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auto eraser_color_toggler = GUI::Action::create_checkable("Use secondary color", [&](auto& action) {
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m_use_secondary_color = action.is_checked();
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});
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eraser_color_toggler->set_checked(m_use_secondary_color);
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m_context_menu->add_action(eraser_color_toggler);
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m_context_menu->add_separator();
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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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Color EraseTool::get_color() const
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{
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if (m_use_secondary_color)
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return m_widget->secondary_color();
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return Color(255, 255, 255, 0);
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}
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