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docs/FAQ.md
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@ -204,6 +204,37 @@ ctx->RSSetScissorRects(1, &r); |
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### Q: How can I have multiple widgets with the same label? |
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### Q: How can I have multiple windows with the same label? |
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**USING THE SAME LABEL+ID IS THE MOST COMMON USER MISTAKE:** |
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<table> |
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<tr> |
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<td><img src="https://github.com/ocornut/imgui/assets/8225057/76eb9467-74d1-4e95-9f56-be81c6dd029d"></td> |
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<td> |
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<pre lang="cpp"> |
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ImGui::Begin("Incorrect!"); |
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ImGui::DragFloat2("My value", &objects[0]->pos.x); |
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ImGui::DragFloat2("My value", &objects[1]->pos.x); |
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ImGui::DragFloat2("My value", &objects[2]->pos.x); |
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ImGui::End(); |
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ImGui::Begin("Correct!"); |
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ImGui::DragFloat2("My value", &objects[0]->pos.x); |
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ImGui::DragFloat2("My value##2", &objects[1]->pos.x); |
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ImGui::DragFloat2("My value##3", &objects[2]->pos.x); |
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ImGui::End(); |
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ImGui::Begin("Also Correct!"); |
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for (int n = 0; n < 3; n++) |
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{ |
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ImGui::PushID(n); |
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ImGui::DragFloat2("My value", &objects[n]->pos.x); |
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ImGui::PopID(); |
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} |
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ImGui::End(); |
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</pre> |
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</td> |
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</tr> |
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</table> |
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A primer on labels and the ID Stack... |
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Dear ImGui internally needs to uniquely identify UI elements. |
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