Multiple windows with the same name. #4366

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opened 2021-07-26 14:27:28 +00:00 by Stanlyhalo · 1 comment

Stanlyhalo commented

2021-07-26 14:27:28 +00:00

(Migrated from github.com)

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?

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** ![image](https://user-images.githubusercontent.com/36088749/127004595-6f3ab3de-b37e-4796-91b9-a89a6f072ce1.png) _ui.cpp_ ```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_ ```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_ ```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?

👍 1

ocornut commented

2021-07-26 14:42:59 +00:00

(Migrated from github.com)

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.

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.