Multiple windows with the same name.

[Stanlyhalo]

Version: 1.83
Branch: docking

**My Issue/Question:**How can I have multiple windows (initialized with ::Begin) with the same name?

I'm trying to have multiple windows for my game engine called "Project Hierarchy" and "Map Hierarchy", which works fine... until I have two instances of a window like "Map Hierarchy" open, in which case they will have duplicated instances on one window instead of separate windows.

Screenshot

ui.cpp

void Styler::startWindow(const char* title) {
	static ImGuiWindowFlags titlebar_flags = ImGuiWindowFlags_None;
	const ImGuiViewport* viewport = ImGui::GetMainViewport();

	ImGui::SetNextWindowViewport(viewport->ID);

	ImGui::Begin(title, (bool*)true, titlebar_flags);
}
void Styler::endWindow() {
	ImGui::End();
}
// ***
void WindowMapHierarchy::Render() {
	Styler::startWindow("Map Hierarchy");
	ImGui::LabelText("", "Game Objects in Scene.");
	Styler::endWindow();
};

ui.hpp

class Styler {
public:
	static void startWindow(const char* title);
	static void endWindow();
};
class BaseWindow {
public:
	BaseWindow() {};
	~BaseWindow() {};

	virtual void Render() {};
};
class WindowMapHierarchy : public BaseWindow { public: void Render(); };

app.cpp

WindowMapHierarchy win_mapHierarchy{};

If you do use this code, just call the Render function of win_mapHierarchy, I did remove a lot of code from this uploaded code to simplify it and still have it usable, but yeah, if you make two instances of WindowMapHierarchy win_mapHierarchy{}; in the app implementation file, and call both of the Render functions one after another, all the elements get combined into one, any solution for this?

[ocornut]

See Demo>Examples>Manipulating window titles

And see FAQ entries:
"How can I have multiple widgets with the same label?"
https://github.com/ocornut/imgui/blob/master/docs/FAQ.md#q-how-can-i-have-multiple-widgets-with-the-same-label

Same answer applies.

Using Begin() with the same identifier allows appending to a same window from a different location.