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#include "../../include/gui/ComboBox.hpp"
#include "../../include/gui/Utils.hpp"
#include "../../include/Theme.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_scale = 0.004629f;
static const float padding_bottom_scale = 0.004629f;
static const float padding_left_scale = 0.007f;
static const float padding_right_scale = 0.007f;
static const float border_scale = 0.0015f;
ComboBox::ComboBox(mgl::Font *font) : font(font), dropdown_arrow(&get_theme().combobox_arrow_texture) {
assert(font);
}
bool ComboBox::on_event(mgl::Event &event, mgl::Window&, mgl::vec2f offset) {
if(!visible)
return true;
if(items.empty())
return true;
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 = get_size();
if(show_dropdown) {
for(size_t i = 0; i < items.size(); ++i) {
Item &item = items[i];
if(mgl::FloatRect(item.position, item_size).contains(mouse_pos)) {
const size_t prev_selected_item = selected_item;
selected_item = i;
show_dropdown = false;
remove_widget_as_selected_in_parent();
if(selected_item != prev_selected_item && on_selection_changed)
on_selection_changed(item.text.get_string(), item.id);
return false;
}
}
}
const mgl::vec2f draw_pos = position + offset;
if(mgl::FloatRect(draw_pos, item_size).contains(mouse_pos)) {
show_dropdown = !show_dropdown;
if(show_dropdown)
set_widget_as_selected_in_parent();
else
remove_widget_as_selected_in_parent();
} else {
show_dropdown = false;
remove_widget_as_selected_in_parent();
}
}
return true;
}
void ComboBox::draw(mgl::Window &window, mgl::vec2f offset) {
if(!visible)
return;
update_if_dirty();
const mgl::vec2f draw_pos = (position + offset).floor();
if(show_dropdown)
draw_selected(window, draw_pos);
else
draw_unselected(window, draw_pos);
}
void ComboBox::add_item(const std::string &text, const std::string &id) {
items.push_back({mgl::Text(text, *font), id, {0.0f, 0.0f}});
dirty = true;
}
void ComboBox::set_selected_item(const std::string &id, bool trigger_event, bool trigger_event_even_if_selection_not_changed) {
for(size_t i = 0; i < items.size(); ++i) {
auto &item = items[i];
if(item.id == id) {
const size_t prev_selected_item = selected_item;
selected_item = i;
if(trigger_event && (trigger_event_even_if_selection_not_changed || selected_item != prev_selected_item) && on_selection_changed)
on_selection_changed(item.text.get_string(), item.id);
break;
}
}
}
const std::string& ComboBox::get_selected_id() const {
if(items.empty()) {
static std::string dummy;
return dummy;
} else {
return items[selected_item].id;
}
}
void ComboBox::draw_selected(mgl::Window &window, mgl::vec2f draw_pos) {
const int padding_top = padding_top_scale * get_theme().window_height;
const int padding_left = padding_left_scale * get_theme().window_height;
mgl_scissor scissor;
mgl_window_get_scissor(window.internal_window(), &scissor);
const bool bottom_is_outside_scissor = draw_pos.y + max_size.y > scissor.position.y + scissor.size.y;
const mgl::vec2f item_size = get_size();
mgl::vec2f items_draw_pos = draw_pos + mgl::vec2f(0.0f, item_size.y);
mgl::Rectangle background(draw_pos, item_size.floor());
background.set_size(max_size.floor());
background.set_color(mgl::Color(0, 0, 0));
if(bottom_is_outside_scissor) {
background.set_position((draw_pos - mgl::vec2f(0.0f, background.get_size().y - item_size.y)).floor());
items_draw_pos = background.get_position();
}
window.draw(background);
if(selected_item < items.size()) {
draw_item_outline(window, draw_pos, item_size);
Item &selected_item_widget = items[selected_item];
selected_item_widget.text.set_position(draw_pos + mgl::vec2f(padding_left, padding_top).floor());
window.draw(selected_item_widget.text);
}
bool cursor_inside = false;
const mgl::vec2f mouse_pos = window.get_mouse_position().to_vec2f();
for(size_t i = 0; i < items.size(); ++i) {
if(!cursor_inside) {
cursor_inside = mgl::FloatRect(items_draw_pos, item_size).contains(mouse_pos);
if(cursor_inside) {
mgl::Rectangle item_background(items_draw_pos.floor(), item_size.floor());
item_background.set_color(get_theme().tint_color);
window.draw(item_background);
}
}
Item &item = items[i];
item.text.set_position((items_draw_pos + mgl::vec2f(padding_left, padding_top)).floor());
window.draw(item.text);
item.position = items_draw_pos;
items_draw_pos.y += item_size.y;
}
}
void ComboBox::draw_unselected(mgl::Window &window, mgl::vec2f draw_pos) {
const int padding_top = padding_top_scale * get_theme().window_height;
const int padding_left = padding_left_scale * get_theme().window_height;
const int padding_right = padding_right_scale * get_theme().window_height;
const mgl::vec2f item_size = get_size();
mgl::Rectangle background(draw_pos.floor(), item_size.floor());
background.set_color(mgl::Color(0, 0, 0, 120));
window.draw(background);
dropdown_arrow.set_height(get_dropdown_arrow_height());
dropdown_arrow.set_position(draw_pos + mgl::vec2f(item_size.x - dropdown_arrow.get_size().x - padding_right, item_size.y * 0.5f - dropdown_arrow.get_size().y * 0.5f).floor());
dropdown_arrow.set_color(mgl::Color(255, 255, 255, 30));
window.draw(dropdown_arrow);
if(selected_item < items.size()) {
const mgl::vec2f mouse_pos = window.get_mouse_position().to_vec2f();
const bool mouse_inside = mgl::FloatRect(draw_pos, item_size).contains(mouse_pos) && !has_parent_with_selected_child_widget();
if(mouse_inside)
draw_item_outline(window, draw_pos, item_size);
Item &selected_item_widget = items[selected_item];
selected_item_widget.text.set_position(draw_pos + mgl::vec2f(padding_left, padding_top).floor());
window.draw(selected_item_widget.text);
}
}
void ComboBox::draw_item_outline(mgl::Window &window, mgl::vec2f pos, mgl::vec2f size) {
const int border_size = std::max(1.0f, border_scale * get_theme().window_height);
const mgl::Color border_color = get_theme().tint_color;
draw_rectangle_outline(window, pos.floor(), size.floor(), border_color, border_size);
}
void ComboBox::update_if_dirty() {
if(!dirty)
return;
const int padding_top = padding_top_scale * get_theme().window_height;
const int padding_bottom = padding_bottom_scale * get_theme().window_height;
const int padding_left = padding_left_scale * get_theme().window_height;
const int padding_right = padding_right_scale * get_theme().window_height;
max_size = { 0.0f, font->get_character_size() + (float)padding_top + (float)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;
}
if(max_size.x <= 0.001f)
max_size.x = 50.0f;
max_size.x += padding_left + get_dropdown_arrow_height();
dirty = false;
}
mgl::vec2f ComboBox::get_size() {
if(!visible)
return {0.0f, 0.0f};
update_if_dirty();
const int padding_top = padding_top_scale * get_theme().window_height;
const int padding_bottom = padding_bottom_scale * get_theme().window_height;
return { max_size.x, font->get_character_size() + (float)padding_top + (float)padding_bottom };
}
float ComboBox::get_dropdown_arrow_height() const {
const int padding_top = padding_top_scale * get_theme().window_height;
const int padding_bottom = padding_bottom_scale * get_theme().window_height;
return (font->get_character_size() + padding_top + padding_bottom) * 0.4f;
}
}
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