What is a correct way to handle keyboard input for active/current/selected/focused window only?

[MichaelKv]

Hello,
From imgui.h:
#define IMGUI_VERSION "1.89 WIP"
#define IMGUI_VERSION_NUM 18814
#define IMGUI_CHECKVERSION() ImGui::DebugCheckVersionAndDataLayout(IMGUI_VERSION, sizeof(ImGuiIO), sizeof(ImGuiStyle), sizeof(ImVec2), sizeof(ImVec4), sizeof(ImDrawVert), sizeof(ImDrawIdx))
#define IMGUI_HAS_TABLE
#define IMGUI_HAS_VIEWPORT // Viewport WIP branch
#define IMGUI_HAS_DOCK // Docking WIP branch
Dx12

What is a correct way to handle keyboard input for active/current/selected/focused window only? I.e. the window in the docking environment that is highlighted at this very moment. I have two windows that handle arrow keys differently. I tried:
if (ImGui::IsItemFocused()) { if (ImGui::IsKeyPressed(ImGui::GetKeyIndex(ImGuiKey_UpArrow))) { ...

And
if (ImGui::IsItemActive ()) { if (ImGui::IsKeyPressed(ImGui::GetKeyIndex(ImGuiKey_UpArrow))) { ...

It did not work. IsItemActive worked if I held the key and clicked the window caption. So, it was bad idea indeed.
I tried the code above within Begin/End. Sorry, I was unable to find a proper example.
Thank you.

[ocornut]

Try using IsWindowFocused().

PS: GetKeyIndex() is a no-op since 1.87
You can call IsKeyPressed(ImGuiKey_UpArrow).

[MichaelKv]

Thanks. It did the job. I cannot believe I have overlooked it. I see that I do not need to put my keyboard handling code after all children to use ImGuiFocusedFlags_ChildWindows flag. I.e. I have
Begin("window"...
processInputWithImGuiFocusedFlags_ChildWindows()
BeginChild("child1"...
and it works. Is it by chance and I need to put processInputWithImGuiFocusedFlags_ChildWindows() after all the children or it is right approach?
And thanks for the hint on GetKeyIndex.

[MichaelKv]

I have another question. I have the following situation:
``
void processAAAInput() {
if (ImGui::IsWindowFocused(ImGuiFocusedFlags_ChildWindows)) {
if (ImGui::IsKeyPressed(ImGuiKey_LeftArrow)) {
void draw () {
with_Window("AAA"…
processAAAInput(ImGuiFocusedFlags_ChildWindows); // 111
…
with_Child("BBB"…
}
if (ImGui::Button(“CCC”…
// 222
}

processAAAInput does not handle input (arrow keys) unless I click inside the AAA window (I click the BBB child). Then it works until I press the CCC button. To make it to work again I need to click inside AAA again.
This happens regardless of processAAAInput position – 111 or 222.
I expect processAAAInput shall handle the input after I clicked the CCC button but it does not.

P.S. Sorry, the source code tag in this message does not work for me -- it draws everything in one line here.

[ocornut]

Your source code is hard to decipher. Please make an effort to create an actual minimal pastable repro, and use eg ImGui::Text() elements to visuable the state of eg IsWindowFocused() return value.

[MichaelKv]

Please, never mind my last question. I never knew the focus is on the last Begin(…) window as far as I had common key handling (without a IsWindowFocused call). So, when I added IsWindowFocused my “main” window the one I drawn first did not handled any input until I clicked it. And I have left some key handlers in a child window so when I pressed the button outside it stopped working too until clicking inside.
I am really sorry.

[ocornut]

Great to hear. Closing as answered.