Add radio button with simple/advanced view, add widget visibility

src/gui/RadioButton.cpp

@@ -0,0 +1,129 @@
+#include "../../include/gui/RadioButton.hpp"
+#include "../../include/gui/Utils.hpp"
+#include "../../include/Theme.hpp"
+#include <mglpp/graphics/Rectangle.hpp>
+#include <mglpp/window/Window.hpp>
+#include <mglpp/window/Event.hpp>
+#include <mglpp/system/FloatRect.hpp>
+
+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 spacing_scale = 0.007f;
+    static const float border_scale = 0.0015f;
+
+    RadioButton::RadioButton(mgl::Font *font) : font(font) {
+
+    }
+
+    bool RadioButton::on_event(mgl::Event &event, mgl::Window&, mgl::vec2f offset) {
+        if(!visible)
+            return true;
+
+        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;
+
+        if(event.type == mgl::Event::MouseButtonPressed && event.mouse_button.button == mgl::Mouse::Left) {
+            mgl::vec2f draw_pos = position + offset;
+            for(size_t i = 0; i < items.size(); ++i) {
+                auto &item = items[i];
+                const mgl::vec2f item_size = item.text.get_bounds().size + mgl::vec2f(padding_left + padding_right, padding_top + padding_bottom);
+
+                const bool mouse_inside = mgl::FloatRect(draw_pos, item_size).contains(mgl::vec2f(event.mouse_button.x, event.mouse_button.y));
+                if(mouse_inside) {
+                    const size_t prev_selected_item = selected_item;
+                    selected_item = i;
+
+                    if(selected_item != prev_selected_item && on_selection_changed)
+                        on_selection_changed(item.text.get_string(), item.id);
+
+                    return false;
+                }
+
+                draw_pos.x += item_size.x + spacing_scale * get_theme().window_height;
+            }
+        }
+        return true;
+    }
+
+    void RadioButton::draw(mgl::Window &window, mgl::vec2f offset) {
+        if(!visible)
+            return;
+
+        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;
+        const int padding_left = padding_left_scale * get_theme().window_height;
+        const int padding_right = padding_right_scale * get_theme().window_height;
+
+        const bool can_select_item = !has_parent_with_selected_child_widget();
+
+        mgl::vec2f draw_pos = position + offset;
+        for(size_t i = 0; i < items.size(); ++i) {
+            auto &item = items[i];
+            const mgl::vec2f item_size = item.text.get_bounds().size + mgl::vec2f(padding_left + padding_right, padding_top + padding_bottom);
+            mgl::Rectangle background(item_size.floor());
+            background.set_position(draw_pos.floor());
+            background.set_color(i == selected_item ? get_theme().tint_color : mgl::Color(0, 0, 0, 120));
+            window.draw(background);
+
+            const bool mouse_inside = mgl::FloatRect(draw_pos, item_size).contains(window.get_mouse_position().to_vec2f());
+            if(can_select_item && mouse_inside) {
+                const int border_size = border_scale * get_theme().window_height;
+                const mgl::Color border_color = get_theme().tint_color;
+                draw_rectangle_outline(window, draw_pos.floor(), item_size.floor(), border_color, border_size);
+            }
+
+            item.text.set_position((draw_pos + item_size * 0.5f - item.text.get_bounds().size * 0.5f).floor());
+            window.draw(item.text);
+
+            draw_pos.x += item_size.x + spacing_scale * get_theme().window_height;
+        }
+    }
+
+    void RadioButton::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;
+
+        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;
+            size.x += bounds.x + padding_left + padding_right;
+        }
+        if(items.size() > 1)
+            size.x += (items.size() - 1) * spacing_scale * get_theme().window_height;
+        dirty = false;
+    }
+
+    mgl::vec2f RadioButton::get_size() {
+        if(!visible)
+            return {0.0f, 0.0f};
+
+        update_if_dirty();
+        return size;
+    }
+
+    void RadioButton::add_item(const std::string &text, const std::string &id) {
+        items.push_back({mgl::Text(text, *font), id});
+        dirty = true;
+    }
+
+    void RadioButton::set_selected_item(const std::string &id) {
+        for(size_t i = 0; i < items.size(); ++i) {
+            if(items[i].id == id) {
+                selected_item = i;
+                break;
+            }
+        }
+    }
+}