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#include "../../include/gui/ComboBox.hpp"
#include <mglpp/graphics/Rectangle.hpp>
#include <mglpp/graphics/Font.hpp>
#include <mglpp/window/Window.hpp>
#include <mglpp/window/Event.hpp>
#include <assert.h>
namespace gsr {
static const float padding_top = 10.0f;
static const float padding_bottom = 10.0f;
static const float padding_left = 10.0f;
static const float padding_right = 10.0f;
ComboBox::ComboBox(mgl::Font *font) : font(font) {
assert(font);
}
bool ComboBox::on_event(mgl::Event &event, mgl::Window&) {
if(event.type == mgl::Event::MouseButtonPressed && event.mouse_button.button == mgl::Mouse::Left) {
const mgl::vec2f mouse_pos = { (float)event.mouse_button.x, (float)event.mouse_button.y };
const mgl::vec2f item_size(max_size.x, font->get_character_size() + padding_top + padding_bottom);
if(show_dropdown && !items.empty()) {
mgl::vec2f pos = position + mgl::vec2f(padding_left, padding_top);
pos.y += items[selected_item].text.get_bounds().size.y + padding_top + padding_bottom;
for(size_t i = 0; i < items.size(); ++i) {
Item &item = items[i];
const mgl::FloatRect text_bounds = item.text.get_bounds();
if(mgl::FloatRect(pos - mgl::vec2f(padding_left, padding_top), item_size).contains(mouse_pos)) {
selected_item = i;
show_dropdown = false;
return false;
}
pos.y += text_bounds.size.y + padding_top + padding_bottom;
}
}
if(mgl::FloatRect(position, item_size).contains(mouse_pos)) {
show_dropdown = !show_dropdown;
move_to_top = true;
} else {
show_dropdown = false;
}
}
return true;
}
static void draw_rectangle_outline(mgl::Window &window, mgl::vec2f pos, mgl::vec2f size, mgl::Color color, float border_size) {
// Green line at top
{
mgl::Rectangle rect({ size.x, border_size });
rect.set_position(pos);
rect.set_color(color);
window.draw(rect);
}
// Green line at bottom
{
mgl::Rectangle rect({ size.x, border_size });
rect.set_position(pos + mgl::vec2f(0.0f, size.y - border_size));
rect.set_color(color);
window.draw(rect);
}
// Green line at left
{
mgl::Rectangle rect({ border_size, size.y - border_size * 2 });
rect.set_position(pos + mgl::vec2f(0, border_size));
rect.set_color(color);
window.draw(rect);
}
// Green line at right
{
mgl::Rectangle rect({ border_size, size.y - border_size * 2 });
rect.set_position(pos + mgl::vec2f(size.x - border_size, border_size));
rect.set_color(color);
window.draw(rect);
}
}
void ComboBox::draw(mgl::Window &window) {
update_if_dirty();
if(items.empty())
return;
const mgl::vec2f item_size(max_size.x, font->get_character_size() + padding_top + padding_bottom);
const mgl::vec2i mouse_pos = window.get_mouse_position();
bool inside = false;
mgl::Rectangle background(position, mgl::vec2f(max_size.x, item_size.y));
if(show_dropdown) {
background.set_size(max_size);
background.set_color(mgl::Color(0, 0, 0));
} else {
background.set_color(mgl::Color(0, 0, 0, 220));
}
window.draw(background);
mgl::vec2f pos = position + mgl::vec2f(padding_left, padding_top);
Item &item = items[selected_item];
item.text.set_position(pos);
if(show_dropdown) {
const int border_size = 3;
const mgl::Color border_color(118, 185, 0);
draw_rectangle_outline(window, pos - mgl::vec2f(padding_left, padding_top), item_size, border_color, border_size);
}
window.draw(item.text);
pos.y += item.text.get_bounds().size.y + padding_top + padding_bottom;
for(size_t i = 0; i < items.size(); ++i) {
Item &item = items[i];
item.text.set_position(pos);
const mgl::FloatRect text_bounds = item.text.get_bounds();
if(show_dropdown) {
if(!inside) {
inside = mgl::FloatRect(text_bounds.position - mgl::vec2f(padding_left, padding_top), item_size).contains({ (float)mouse_pos.x, (float)mouse_pos.y });
if(inside) {
mgl::Rectangle item_background(text_bounds.position - mgl::vec2f(padding_left, padding_top), item_size);
item_background.set_color(mgl::Color(118, 185, 0));
window.draw(item_background);
} else {
/*const int border_size = 3;
const mgl::Color border_color(150, 150, 150);
draw_rectangle_outline(window, text_bounds.position, item_size, border_color, border_size);*/
}
}
window.draw(item.text);
}
pos.y += text_bounds.size.y + padding_top + padding_bottom;
}
}
void ComboBox::add_item(const std::string &text, const std::string &id) {
items.push_back({mgl::Text(text, *font), id});
dirty = true;
}
void ComboBox::update_if_dirty() {
if(!dirty)
return;
max_size = { 0.0f, font->get_character_size() + padding_top + padding_bottom };
for(Item &item : items) {
const mgl::vec2f bounds = item.text.get_bounds().size;
max_size.x = std::max(max_size.x, bounds.x + padding_left + padding_right);
max_size.y += bounds.y + padding_top + padding_bottom;
}
dirty = false;
}
mgl::vec2f ComboBox::get_size() {
update_if_dirty();
return { max_size.x, font->get_character_size() + padding_top + padding_bottom };
}
}
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