Menu Theme doesn't update.

reepblue · January 29, 2023

This example shows that if the theme of the UI is changed, the menu bar dropdown lists fail to update it's background. This might happen with other widgets if this functionality is shared with other widgets.

#include "UltraEngine.h"

using namespace UltraEngine;

int main(int argc, const char* argv[])
{
    //Get the displays
    auto displays = GetDisplays();

    //Create window
    auto window = CreateWindow("Ultra Engine", 0, 0, 800, 600, displays[0]);

    //Create user interface
    auto ui = CreateInterface(window);

    //Create widget
    iVec2 sz = ui->root->ClientSize();
    auto button_dark = CreateButton("Dark Theme", sz.x / 4 - 75, sz.y / 4 - 15, 150, 30, ui->root);
    auto button_light = CreateButton("Light Theme", sz.x / 4 * 3 - 75, sz.y / 4 - 15, 150, 30, ui->root);

    //File menu
    auto mainmenu = CreateMenu("", ui->root);
    auto menu_file = CreateMenu("File", mainmenu);
    CreateMenu("New", menu_file);
    CreateMenu("", menu_file);
    auto menu_open = CreateMenu("Open", menu_file);
    auto menu_save = CreateMenu("Save", menu_file);
    auto menu_saveas = CreateMenu("Save as...", menu_file);
    CreateMenu("", menu_file);
    auto menu_recentfiles = CreateMenu("Recent files", menu_file);
    std::array<shared_ptr<Widget>, 10> menu_recentfile;
    for (int n = 0; n < menu_recentfile.size(); ++n)
    {
        menu_recentfile[n] = CreateMenu("Recent file " + String(n + 1), menu_recentfiles);
    }
    CreateMenu("", menu_file);
    auto menu_exit = CreateMenu("Exit", menu_file);

    //Edit menu
    auto menu_edit = CreateMenu("Edit", mainmenu);
    CreateMenu("Undo", menu_edit);
    CreateMenu("Redo", menu_edit);
    CreateMenu("", menu_edit);
    CreateMenu("Cut", menu_edit);
    CreateMenu("Copy", menu_edit);
    CreateMenu("Past", menu_edit);
    CreateMenu("", menu_edit);
    CreateMenu("Select all", menu_edit);
    CreateMenu("Select none", menu_edit);
    CreateMenu("Invert selection", menu_edit);

    //View menu
    auto menu_view = CreateMenu("View", mainmenu);
    auto menu_perspective = CreateMenu("Perspective", menu_view);
    auto menu_top = CreateMenu("XZ - Top", menu_view);
    auto menu_side = CreateMenu("XZ - Side", menu_view);
    auto menu_front = CreateMenu("XY - Front", menu_view);
    menu_perspective->SetState(true);

    //Tools menu
    auto menu_tools = CreateMenu("Tools", mainmenu);
    auto menu_options = CreateMenu("Options", menu_tools);

    //Help menu
    auto menu_help = CreateMenu("Help", mainmenu);
    auto menu_helpcontents = CreateMenu("Help Contents", menu_help);
    auto menu_about = CreateMenu("About", menu_help);

    //Text area
    auto textarea = CreateTextArea(8,sz.y/2,sz.x-16,sz.y/2-8,ui->root);
    textarea->SetText(LoadString("https://raw.githubusercontent.com/UltraEngine/Documentation/master/Assets/Themes/dark.json"));

    while (true)
    {
        const Event ev = WaitEvent();
        switch (ev.id)
        {
        case EVENT_WIDGETACTION:
            if (ev.source == button_dark)
            {
                //Load dark color scheme
                ui->LoadColorScheme("https://raw.githubusercontent.com/UltraEngine/Documentation/master/Assets/Themes/dark.json");
                textarea->SetText(LoadString("https://raw.githubusercontent.com/UltraEngine/Documentation/master/Assets/Themes/dark.json"));
            }
            else if (ev.source == button_light)
            {
                //Load light color scheme
                ui->LoadColorScheme("https://raw.githubusercontent.com/UltraEngine/Documentation/master/Assets/Themes/light.json");
                textarea->SetText(LoadString("https://raw.githubusercontent.com/UltraEngine/Documentation/master/Assets/Themes/light.json"));
            }
            break;
        case EVENT_WINDOWCLOSE:
            if (ev.source == window)
            {
                return 0;
            }
            break;
        }
    }
    return 0;
}