Time Control Panel¶

TimeControlPanel is a built-in ImGui window that exposes the global TimeController to the user without any custom UI code.

Adding the Panel¶

#include <ivfui/time_control_panel.h>

int onSetup() override
{
    addUiWindow(ivfui::TimeControlPanel::create());
    return 0;
}

One line. The panel appears automatically and manages itself.

What the Panel Shows¶

Control	Function
Pause / Resume button	Toggles `TimeController::isPaused()`
Time scale slider (0–4×)	Calls `setScale()` in 0.1 increments
Reset button	Calls `reset()` — elapsed returns to 0
Elapsed readout	Live display of `elapsed()` in seconds
Delta readout	Live display of `delta()` (0 when paused)
Status label	Shows PAUSED or the current scale value

Combining with Keyboard Controls¶

The panel and keyboard controls operate on the same TimeController singleton, so they stay in sync automatically:

void onKey(int key, int, int action, int) override
{
    if (action != GLFW_PRESS) return;
    auto *tc = ivf::TimeController::instance();
    if (key == GLFW_KEY_SPACE) tc->togglePause();
    if (key == GLFW_KEY_R)     tc->reset();
}

Moving the panel slider and pressing Space both affect the same state.

Extending with Custom Logic¶

For more control, read TimeController state directly and build your own ImGui layout alongside the panel:

void onDrawUi() override
{
    auto *tc = ivf::TimeController::instance();
    ImGui::Text("Elapsed: %.2f s", tc->elapsed());
    if (ImGui::Button("Slow motion"))
        tc->setScale(0.2f);
    ImGui::SameLine();
    if (ImGui::Button("Normal"))
        tc->setScale(1.0f);
}

See Time Control for the full TimeController API.