Function ShowExampleAppWindowTitles

core/src/imgui/imgui_demo.cpp:7171–7197

Demonstrate using "##" and "###" in identifiers to manipulate ID generation. This apply to all regular items as well. Read FAQ section "How can I have multiple widgets with the same label?" for details.

// This apply to all regular items as well.
// Read FAQ section "How can I have multiple widgets with the same label?" for details.
static void ShowExampleAppWindowTitles(bool*)
{
    const ImGuiViewport* viewport = ImGui::GetMainViewport();
    const ImVec2 base_pos = viewport->Pos;

    // By default, Windows are uniquely identified by their title.
    // You can use the "##" and "###" markers to manipulate the display/ID.

    // Using "##" to display same title but have unique identifier.
    ImGui::SetNextWindowPos(ImVec2(base_pos.x + 100, base_pos.y + 100), ImGuiCond_FirstUseEver);
    ImGui::Begin("Same title as another window##1");
    ImGui::Text("This is window 1.\nMy title is the same as window 2, but my identifier is unique.");
    ImGui::End();

    ImGui::SetNextWindowPos(ImVec2(base_pos.x + 100, base_pos.y + 200), ImGuiCond_FirstUseEver);
    ImGui::Begin("Same title as another window##2");
    ImGui::Text("This is window 2.\nMy title is the same as window 1, but my identifier is unique.");
    ImGui::End();

    // Using "###" to display a changing title but keep a static identifier "AnimatedTitle"
    char buf[128];
    sprintf(buf, "Animated title %c %d###AnimatedTitle", "|/-\\"[(int)(ImGui::GetTime() / 0.25f) & 3], ImGui::GetFrameCount());
    ImGui::SetNextWindowPos(ImVec2(base_pos.x + 100, base_pos.y + 300), ImGuiCond_FirstUseEver);
    ImGui::Begin(buf);
    ImGui::Text("This window has a changing title.");
    ImGui::End();
}

//-----------------------------------------------------------------------------
// [SECTION] Example App: Custom Rendering using ImDrawList API / ShowExampleAppCustomRendering()