libui: Add Dialog

gui/libui/CMakeLists.txt

@@ -19,6 +19,7 @@ set(SOURCES
     src/Label.cpp
     src/InputField.cpp
     src/TextInput.cpp
+    src/Dialog.cpp
 )
 
 add_library(ui ${SOURCES})

gui/libui/include/ui/Dialog.h

@@ -0,0 +1,22 @@
+/**
+ * @file Window.h
+ * @author apio (cloudapio.eu)
+ * @brief UI window dialogs.
+ *
+ * @copyright Copyright (c) 2024, the Luna authors.
+ *
+ */
+
+#pragma once
+#include <os/Action.h>
+#include <ui/Window.h>
+
+namespace ui
+{
+    namespace Dialog
+    {
+        Result<void> show_message(StringView title, StringView message);
+
+        Result<void> show_input_dialog(StringView title, StringView message, os::Function<StringView> callback);
+    }
+}

gui/libui/src/Dialog.cpp

@@ -0,0 +1,82 @@
+/**
+ * @file Dialog.cpp
+ * @author apio (cloudapio.eu)
+ * @brief UI window dialogs.
+ *
+ * @copyright Copyright (c) 2024, the Luna authors.
+ *
+ */
+
+#include <luna/Alloc.h>
+#include <ui/App.h>
+#include <ui/Dialog.h>
+#include <ui/InputField.h>
+#include <ui/Label.h>
+#include <ui/Layout.h>
+
+namespace ui::Dialog
+{
+    Result<void> show_message(StringView title, StringView message)
+    {
+        auto rect = ui::App::the().main_window()->canvas().rect();
+        int text_length = (int)message.length() * ui::Font::default_font()->width();
+        int text_height = ui::Font::default_font()->height();
+
+        ui::Rect dialog_rect = { 0, 0, text_length + 20, text_height + 20 };
+
+        auto* dialog = TRY(ui::Window::create(
+            ui::align(rect, dialog_rect, ui::VerticalAlignment::Center, ui::HorizontalAlignment::Center)));
+
+        dialog->set_background(ui::GRAY);
+        dialog->set_title(title);
+
+        ui::Label* text = TRY(make<ui::Label>(message));
+        text->set_color(ui::BLACK);
+        dialog->set_main_widget(*text);
+
+        dialog->on_close([text] { delete text; });
+
+        dialog->draw();
+
+        return {};
+    }
+
+    Result<void> show_input_dialog(StringView title, StringView message, os::Function<StringView> callback)
+    {
+        auto rect = ui::App::the().main_window()->canvas().rect();
+        int text_length = (int)message.length() * ui::Font::default_font()->width();
+        int text_height = ui::Font::default_font()->height();
+
+        ui::Rect dialog_rect = { 0, 0, max(text_length + 20, 300), text_height * 2 + 30 };
+
+        auto* dialog = TRY(ui::Window::create(
+            ui::align(rect, dialog_rect, ui::VerticalAlignment::Center, ui::HorizontalAlignment::Center)));
+
+        dialog->set_background(ui::GRAY);
+        dialog->set_title(title);
+
+        ui::VerticalLayout* layout = TRY(make<ui::VerticalLayout>());
+        dialog->set_main_widget(*layout);
+
+        ui::Label* text = TRY(make<ui::Label>((message)));
+        text->set_color(ui::BLACK);
+        layout->add_widget(*text);
+
+        ui::InputField* input = TRY(make<ui::InputField>(ui::Font::default_font()));
+        input->on_submit([dialog, callback](StringView s) {
+            callback(s);
+            dialog->close();
+        });
+        layout->add_widget(*input);
+
+        dialog->on_close([layout, text, input] {
+            delete text;
+            delete input;
+            delete layout;
+        });
+
+        dialog->draw();
+
+        return {};
+    }
+}