Add entry with basic text editing and validation for numbers

TODO

@@ -13,3 +13,5 @@ DISPLAY gamescope-0
 Colorscheme should follow graphics card in use. On nvidia use nvidia green, on intel use intel blue and on amd use amd red.
 
 Optimize list/page when having a few items in it (dont use vector<unique_ptr<Widget>>).
+
+Only redraw ui if changed (dirty state, propagate upward. Set dirty when adding widget or changing any visible properly on a widget or when event updates how the widget should be displayed).

include/gui/Entry.hpp

@@ -0,0 +1,36 @@
+#pragma once
+
+#include "Widget.hpp"
+#include <functional>
+
+#include <mglpp/graphics/Color.hpp>
+#include <mglpp/graphics/Text.hpp>
+
+namespace gsr {
+    using EntryValidateHandler = std::function<bool(std::string &str)>;
+
+    class Entry : public Widget {
+    public:
+        Entry(mgl::Font *font, const char *text, float max_width);
+        Entry(const Entry&) = delete;
+        Entry& operator=(const Entry&) = delete;
+
+        bool on_event(mgl::Event &event, mgl::Window &window, mgl::vec2f offset) override;
+        void draw(mgl::Window &window, mgl::vec2f offset) override;
+
+        mgl::vec2f get_size() override;
+
+        void set_string(std::string str);
+
+        // Return false to specify that the string should not be accepted. This reverts the string back to its previous value.
+        // The input can be changed by changing the input parameter and returning true.
+        EntryValidateHandler validate_handler;
+    private:
+        mgl::Text text;
+        float max_width;
+        bool selected = false;
+        float caret_offset_x = 0.0f;
+    };
+
+    EntryValidateHandler create_entry_validator_integer_in_range(int min, int max);
+}

src/gui/Button.cpp

@@ -13,12 +13,7 @@ namespace gsr {
 
     bool Button::on_event(mgl::Event &event, mgl::Window&, mgl::vec2f offset) {
         if(event.type == mgl::Event::MouseMoved) {
-            const bool inside = mgl::FloatRect(position + offset, size).contains({ (float)event.mouse_move.x, (float)event.mouse_move.y });
+            mouse_inside = mgl::FloatRect(position + offset, size).contains({ (float)event.mouse_move.x, (float)event.mouse_move.y });
-            if(mouse_inside && !inside) {
-                mouse_inside = false;
-            } else if(!mouse_inside && inside) {
-                mouse_inside = true;
-            }
         } else if(event.type == mgl::Event::MouseButtonPressed) {
             const bool clicked_inside = mouse_inside;
             if(clicked_inside && on_click)

src/gui/DropdownButton.cpp

@@ -29,12 +29,7 @@ namespace gsr {
         if(event.type == mgl::Event::MouseMoved) {
             const mgl::vec2f draw_pos = position + offset;
             const mgl::vec2f collision_margin(1.0f, 1.0f); // Makes sure that multiple buttons that are next to each other wont activate at the same time when the cursor is right between them
-            const bool inside = mgl::FloatRect(draw_pos + collision_margin, size - collision_margin).contains({ (float)event.mouse_move.x, (float)event.mouse_move.y });
+            mouse_inside = mgl::FloatRect(draw_pos + collision_margin, size - collision_margin).contains({ (float)event.mouse_move.x, (float)event.mouse_move.y });
-            if(mouse_inside && !inside) {
-                mouse_inside = false;
-            } else if(!mouse_inside && inside) {
-                mouse_inside = true;
-            }
         } else if(event.type == mgl::Event::MouseButtonPressed) {
             const bool clicked_inside = mouse_inside;
 

src/gui/Entry.cpp

@@ -0,0 +1,121 @@
+#include "../../include/gui/Entry.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>
+#include <mglpp/system/Utf8.hpp>
+#include <optional>
+
+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;
+
+    Entry::Entry(mgl::Font *font, const char *text, float max_width) : text("", *font), max_width(max_width) {
+        this->text.set_color(get_theme().text_color);
+        set_string(text);
+    }
+
+    bool Entry::on_event(mgl::Event &event, mgl::Window&, mgl::vec2f offset) {
+        if(event.type == mgl::Event::MouseButtonPressed) {
+            selected = mgl::FloatRect(position + offset, get_size()).contains({ (float)event.mouse_button.x, (float)event.mouse_button.y });
+        } else if(event.type == mgl::Event::KeyPressed && selected) {
+            if(event.key.code == mgl::Keyboard::Backspace && !text.get_string().empty()) {
+                std::string str = text.get_string();
+                const size_t prev_index = mgl::utf8_get_start_of_codepoint((const unsigned char*)str.c_str(), str.size(), str.size());
+                str.erase(prev_index, std::string::npos);
+                set_string(std::move(str));
+            }
+        } else if(event.type == mgl::Event::TextEntered && selected && event.text.codepoint >= 32) {
+            std::string str = text.get_string();
+            str.append(event.text.str, event.text.size);
+            set_string(std::move(str));
+        }
+        return true;
+    }
+
+    void Entry::draw(mgl::Window &window, mgl::vec2f offset) {
+        const mgl::vec2f draw_pos = position + offset;
+
+        mgl::Rectangle background(get_size());
+        background.set_position(draw_pos.floor());
+        background.set_color(selected ? mgl::Color(0, 0, 0, 255) : mgl::Color(0, 0, 0, 120));
+        window.draw(background);
+
+        if(selected) {
+            const int border_size = 3;
+            draw_rectangle_outline(window, draw_pos.floor(), get_size().floor(), get_theme().tint_color, border_size);
+
+            const int caret_width = 2;
+            mgl::Rectangle caret({caret_width, text.get_bounds().size.y});
+            caret.set_position((draw_pos + mgl::vec2f(padding_left + caret_offset_x, padding_top)).floor());
+            caret.set_color(mgl::Color(255, 255, 255));
+            window.draw(caret);
+        }
+
+        text.set_position((draw_pos + mgl::vec2f(padding_left, get_size().y * 0.5f - text.get_bounds().size.y * 0.5f)).floor());
+        window.draw(text);
+    }
+
+    mgl::vec2f Entry::get_size() {
+        return { max_width, text.get_bounds().size.y + padding_top + padding_bottom };
+    }
+
+    void Entry::set_string(std::string str) {
+        if(!validate_handler || validate_handler(str)) {
+            text.set_string(std::move(str));
+            caret_offset_x = text.find_character_pos(99999).x - this->text.get_position().x;
+            fprintf(stderr, "caret offset: %f\n", caret_offset_x);
+        }
+    }
+
+    static bool is_number(uint8_t c) {
+        return c >= '0' && c <= '9';
+    }
+
+    static std::optional<int> to_integer(const std::string &str) {
+        if(str.empty())
+            return std::nullopt;
+
+        size_t i = 0;
+        const bool negative = str[0] == '-';
+        if(negative)
+            i = 1;
+
+        int number = 0;
+        for(; i < str.size(); ++i) {
+            if(!is_number(str[i]))
+                return false;
+
+            const int new_number = number * 10 + (str[i] - '0');
+            if(new_number < number)
+                return std::nullopt; // Overflow
+            number = new_number;
+        }
+        
+        if(negative)
+            number = -number;
+
+        return number;
+    }
+
+    EntryValidateHandler create_entry_validator_integer_in_range(int min, int max) {
+        return [min, max](std::string &str) {
+            if(str.empty())
+                return true;
+
+            std::optional<int> number = to_integer(str);
+            if(!number)
+                return false;
+
+            if(number.value() < min)
+                str = std::to_string(min);
+            else if(number.value() > max)
+                str = std::to_string(max);
+            return true;
+        };
+    }
+}

src/main.cpp

@@ -3,6 +3,7 @@
 #include "../include/gui/ScrollablePage.hpp"
 #include "../include/gui/DropdownButton.hpp"
 #include "../include/gui/Button.hpp"
+#include "../include/gui/Entry.hpp"
 #include "../include/gui/ComboBox.hpp"
 #include "../include/gui/Label.hpp"
 #include "../include/gui/List.hpp"
@@ -182,6 +183,28 @@ static std::string color_to_hex_str(mgl::Color color) {
     return result;
 }
 
+/*
+{
+    {
+        gsr::List::Orientation::VERTICAL,
+        "Record area:",
+        {
+            {"Window, "window"},
+            {"Focused window", "focused"},
+        },
+    },
+    {
+        gsr::List::Orientation::VERTICAL,
+        "Video quality:",
+        {
+            {"Medium, "medium"},
+            {"High", "high"},
+            {"Very high", "very_high"},
+        },
+    }
+}
+*/
+
 static void add_widgets_to_settings_page(mgl::Font &title_font, mgl::vec2i window_size, mgl::vec2f settings_page_position, mgl::vec2f settings_page_size, gsr::Page *settings_page, gsr::Page *settings_content_page, const gsr::GsrInfo &gsr_info, const std::vector<gsr::AudioDevice> &audio_devices, std::function<void()> settings_back_button_callback) {
 auto back_button = std::make_unique<gsr::Button>(&title_font, "Back", mgl::vec2f(window_size.x / 10, window_size.y / 15), gsr::get_theme().scrollable_page_bg_color);
     back_button->set_position(settings_page_position + mgl::vec2f(settings_page_size.x + window_size.x / 50, 0.0f).floor());
@@ -232,7 +255,7 @@ auto back_button = std::make_unique<gsr::Button>(&title_font, "Back", mgl::vec2f
                 auto video_quality_box = std::make_unique<gsr::ComboBox>(&title_font);
                 video_quality_box->add_item("Medium", "medium");
                 video_quality_box->add_item("High (Recommended for live streaming)", "high");
-                video_quality_box->add_item("Very High (Recommended)", "very_high");
+                video_quality_box->add_item("Very high (Recommended)", "very_high");
                 video_quality_box->add_item("Ultra", "ultra");
                 video_quality_list->add_widget(std::move(video_quality_box));
             }
@@ -251,10 +274,10 @@ auto back_button = std::make_unique<gsr::Button>(&title_font, "Back", mgl::vec2f
             auto framerate_list = std::make_unique<gsr::List>(gsr::List::Orientation::VERTICAL);
             {
                 framerate_list->add_widget(std::make_unique<gsr::Label>(&title_font, "Frame rate:", gsr::get_theme().text_color));
-                auto framerate_box = std::make_unique<gsr::ComboBox>(&title_font);
+                //create_entry_validator_integer_in_range
-                framerate_box->add_item("60", "60");
+                auto framerate_entry = std::make_unique<gsr::Entry>(&title_font, "60", title_font.get_character_size() * 2);
-                framerate_box->add_item("30", "30");
+                framerate_entry->validate_handler = gsr::create_entry_validator_integer_in_range(1, 500);
-                framerate_list->add_widget(std::move(framerate_box));
+                framerate_list->add_widget(std::move(framerate_entry));
             }
             quality_list->add_widget(std::move(framerate_list));
         }