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////////////////////////////////////////////////////////////////////////////////
// Copyright (C) 2018 Leo Tenenbaum
// This file is part of GraphColoring.
//
// GraphColoring is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// GraphColoring is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with GraphColoring. If not, see <https://www.gnu.org/licenses/>.
////////////////////////////////////////////////////////////////////////////////
#include "edge.hpp"
#define _USE_MATH_DEFINES
#include <cmath>
#include <cassert>
#include "utils/geometry.hpp"
#include "utils/errors.hpp"
namespace graphcoloring {
int Edge::id_counter = 0;
void Edge::ResetID()
{
id_counter = 0;
}
Edge::Edge(gui::Window* window_, Vertex& from_, Vertex& to_, gui::Color color_,
const gui::Position& viewport_position_, bool directed_)
: id(id_counter++), from(from_), to(to_), window(window_),
viewport_position(viewport_position_)
{
color = color_;
directed = directed_;
color_menu = nullptr;
mousedown_callback_id =
window->SetMousedownCallback([this] (gui::Window*, int x, int y) {
MouseCallback(x, y);
});
x_keyup_callback_id =
window->SetKeyupCallback([this] (gui::Window*) {
if (hovering && !is_delete_protected && delete_callback
&& !is_locked)
delete_callback();
}, GDK_KEY_x);
}
Edge::~Edge()
{
window->RemoveMousedownCallback(mousedown_callback_id);
window->RemoveKeyupCallback(x_keyup_callback_id, GDK_KEY_x);
}
int Edge::OtherEndpoint(int vertex_id) const
{
if (from.id == vertex_id) return to.id;
if (to.id == vertex_id) return from.id;
utils::errors::Die("No other endpoint.");
return -1;
}
void Edge::Lock()
{
is_locked = true;
}
void Edge::Unlock()
{
is_locked = false;
}
bool Edge::IsHovering() const
{
return hovering;
}
bool Edge::IsAdjacentTo(const Edge& edge) const
{
return edge.HasEndpoint(from.id) || edge.HasEndpoint(to.id);
}
void Edge::SetDeleteCallback(std::function<void()> delete_callback_)
{
delete_callback = delete_callback_;
}
gui::Color Edge::Color() const
{
return color;
}
bool Edge::ChangeColor(gui::Color new_color)
{
if (is_color_protected) return false;
color = new_color;
return true;
}
bool Edge::HasEndpoints(int id1, int id2) const
{
if (from.id == id1 && to.id == id2)
return true;
return !directed && from.id == id2 && to.id == id1;
}
bool Edge::HasEndpoint(int v_id) const
{
return from.id == v_id || to.id == v_id;
}
void Edge::Render(bool is_in_path)
{
int dist = utils::geometry::PointToLineSegmentDistance(
window->GetMouseX(), window->GetMouseY(),
from.RenderX(), from.RenderY(), to.RenderX(), to.RenderY(),
EDGE_CLICK_TOLERANCE);
hovering = dist < EDGE_CLICK_TOLERANCE && dist != -1;
int from_x = from.RenderX();
int from_y = from.RenderY();
int to_x = to.RenderX();
int to_y = to.RenderY();
double theta1 = utils::geometry::LineAngle(from_x, from_y, to_x, to_y);
double theta2 = utils::geometry::LineAngle(to_x, to_y, from_x, from_y);
int x1 = from_x + Vertex::VERTEX_RADIUS * std::cos(theta1);
int y1 = from_y + Vertex::VERTEX_RADIUS * std::sin(theta1);
int x2 = to_x + Vertex::VERTEX_RADIUS * std::cos(theta2);
int y2 = to_y + Vertex::VERTEX_RADIUS * std::sin(theta2);
window->SetDrawColor(is_in_path ? gui::colors::WHITE : color);
window->DrawLine(x1, y1, x2, y2);
if (directed)
{
double theta3 = theta2 - M_PI / 4;
double theta4 = theta2 + M_PI / 4;
int x3 = x2 + ARROW_SIZE * std::cos(theta3);
int y3 = y2 + ARROW_SIZE * std::sin(theta3);
int x4 = x2 + ARROW_SIZE * std::cos(theta4);
int y4 = y2 + ARROW_SIZE * std::sin(theta4);
window->DrawLine(x2, y2, x3, y3);
window->DrawLine(x2, y2, x4, y4);
}
}
void Edge::RenderColorMenu()
{
if (color_menu != nullptr)
color_menu->Render();
}
void Edge::MouseCallback(int mouse_x, int mouse_y)
{
if (!hovering || color_menu != nullptr || is_color_protected
|| is_locked)
return;
std::function<void(gui::Color)> callback = [this] (gui::Color color) {
assert(ChangeColor(color));
color_menu = nullptr;
};
color_menu = std::make_unique<ColorMenu>(window,
mouse_x+viewport_position.X(), mouse_y+viewport_position.Y(),
viewport_position, callback);
std::function<void()> close_callback = [this] () {
color_menu = nullptr;
};
color_menu->SetCloseCallback(close_callback);
}
} // namespace graphcoloring
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