Nav: Removed io.NavUsable --> io.NavActive, io.NavActive --> io.NavVisible. (#787). NavActive takes account of NavFlags enable flags.

imgui.cpp

@@ -221,8 +221,8 @@
  - For gamepad use, the easiest approach is to go all-or-nothing, with a buttons combo that toggle your inputs between imgui and your game/application.
    Sharing inputs in a more advanced or granular way between imgui and your game/application may be tricky and requires further work on imgui.
    For more advanced uses, you may want to use:
-     - io.NavUsable: true when a window is focused and it doesn't have the ImGuiWindowFlags_NoNavInputs flag set.
-     - io.NavActive: true when the navigation cursor is visible (and usually goes false when mouse is used).
+     - io.NavActive: true when a window is focused and it doesn't have the ImGuiWindowFlags_NoNavInputs flag set.
+     - io.NavVisible: true when the navigation cursor is visible (and usually goes false when mouse is used).
      - query focus information with IsWindowFocused(), IsAnyWindowFocused(), IsAnyItemFocused() functions.
    The reality is more complex than what those flags can express. Please discuss your issues and usage scenario in the thread above! 
    As we head toward more keyboard-oriented development this aspect will need to be improved.
@@ -2281,7 +2281,7 @@ static void NavMoveRequestCancel()
 static void ImGui::NavProcessItem(ImGuiWindow* window, const ImRect& nav_bb, const ImGuiID id)
 {
     ImGuiContext& g = *GImGui;
-    //if (!g.IO.NavUsable)  // [2017/10/06] Removed this possibly redundant test but I am not sure of all the side-effects yet. Some of the feature here will need to work regardless of using a _NoNavInputs flag.
+    //if (!g.IO.NavActive)  // [2017/10/06] Removed this possibly redundant test but I am not sure of all the side-effects yet. Some of the feature here will need to work regardless of using a _NoNavInputs flag.
     //    return;
 
     const ImGuiItemFlags item_flags = window->DC.ItemFlags;
@@ -2947,8 +2947,8 @@ static void ImGui::NavUpdate()
     NavUpdateWindowing();
 
     // Set output flags for user application
-    g.IO.NavUsable = g.NavWindow && !(g.NavWindow->Flags & ImGuiWindowFlags_NoNavInputs);
-    g.IO.NavActive = (g.IO.NavUsable && g.NavId != 0 && !g.NavDisableHighlight) || (g.NavWindowingTarget != NULL) || g.NavInitRequest;
+    g.IO.NavActive = (g.IO.NavFlags & (ImGuiNavFlags_EnableGamepad | ImGuiNavFlags_EnableKeyboard)) && g.NavWindow && !(g.NavWindow->Flags & ImGuiWindowFlags_NoNavInputs);
+    g.IO.NavVisible = (g.IO.NavActive && g.NavId != 0 && !g.NavDisableHighlight) || (g.NavWindowingTarget != NULL) || g.NavInitRequest;
 
     // Process NavCancel input (to close a popup, get back to parent, clear focus)
     if (IsNavInputPressed(ImGuiNavInput_PadCancel, ImGuiInputReadMode_Pressed))
@@ -13017,7 +13017,7 @@ void ImGui::ShowMetricsWindow(bool* p_open)
             ImGui::Text("ActiveId: 0x%08X/0x%08X (%.2f sec), ActiveIdSource: %s", g.ActiveId, g.ActiveIdPreviousFrame, g.ActiveIdTimer, input_source_names[g.ActiveIdSource]);
             ImGui::Text("ActiveIdWindow: '%s'", g.ActiveIdWindow ? g.ActiveIdWindow->Name : "NULL");
             ImGui::Text("NavWindow: '%s', NavId: 0x%08X, NavLayer: %d", g.NavWindow ? g.NavWindow->Name : "NULL", g.NavId, g.NavLayer);
-            ImGui::Text("NavUsable: %d, NavActive: %d", g.IO.NavUsable, g.IO.NavActive);
+            ImGui::Text("NavActive: %d, NavVisible: %d", g.IO.NavActive, g.IO.NavVisible);
             ImGui::Text("NavActivateId: 0x%08X, NavInputId: 0x%08X", g.NavActivateId, g.NavInputId);
             ImGui::Text("NavDisableHighlight: %d, NavDisableMouseHover: %d", g.NavDisableHighlight, g.NavDisableMouseHover);
             ImGui::Text("DragDrop: %d, SourceId = 0x%08X, Payload \"%s\" (%d bytes)", g.DragDropActive, g.DragDropPayload.SourceId, g.DragDropPayload.DataType, g.DragDropPayload.DataSize);

imgui.h

@@ -1016,8 +1016,8 @@ struct ImGuiIO
     bool        WantCaptureKeyboard;        // When io.WantCaptureKeyboard is true, do not dispatch keyboard input data to your main application. This is set by ImGui when it wants to use your keyboard inputs.
     bool        WantTextInput;              // Mobile/console: when io.WantTextInput is true, you may display an on-screen keyboard. This is set by ImGui when it wants textual keyboard input to happen (e.g. when a InputText widget is active).
     bool        WantMoveMouse;              // MousePos has been altered, back-end should reposition mouse on next frame. Set only when ImGuiNavFlags_MoveMouse flag is enabled in io.NavFlags.
-    bool        NavUsable;                  // Directional navigation is currently allowed (will handle ImGuiKey_NavXXX events) ~ a window is focused and it doesn't use the ImGuiWindowFlags_NoNavInputs flag.
-    bool        NavActive;                  // Directional navigation is active/visible and currently allowed (will handle ImGuiKey_NavXXX events).
+    bool        NavActive;                  // Directional navigation is currently allowed (will handle ImGuiKey_NavXXX events) = a window is focused and it doesn't use the ImGuiWindowFlags_NoNavInputs flag.
+    bool        NavVisible;                 // Directional navigation is visible and allowed (will handle ImGuiKey_NavXXX events).
     float       Framerate;                  // Application framerate estimation, in frame per second. Solely for convenience. Rolling average estimation based on IO.DeltaTime over 120 frames
     int         MetricsAllocs;              // Number of active memory allocations
     int         MetricsRenderVertices;      // Vertices output during last call to Render()

imgui_demo.cpp

@@ -1818,7 +1818,7 @@ void ImGui::ShowDemoWindow(bool* p_open)
             ImGui::Text("Keys release:");   for (int i = 0; i < IM_ARRAYSIZE(io.KeysDown); i++) if (ImGui::IsKeyReleased(i))            { ImGui::SameLine(); ImGui::Text("%d", i); }
             ImGui::Text("Keys mods: %s%s%s%s", io.KeyCtrl ? "CTRL " : "", io.KeyShift ? "SHIFT " : "", io.KeyAlt ? "ALT " : "", io.KeySuper ? "SUPER " : "");
 
-            ImGui::Text("NavUsable: %d, NavActive: %d", io.NavUsable, io.NavActive);
+            ImGui::Text("NavActive: %d, NavVisible: %d", io.NavActive, io.NavVisible);
             ImGui::Text("NavInputs down:"); for (int i = 0; i < IM_ARRAYSIZE(io.NavInputs); i++) if (io.NavInputs[i] > 0.0f)                    { ImGui::SameLine(); ImGui::Text("[%d] %.2f", i, io.NavInputs[i]); }
             ImGui::Text("NavInputs pressed:"); for (int i = 0; i < IM_ARRAYSIZE(io.NavInputs); i++) if (io.NavInputsDownDuration[i] == 0.0f)    { ImGui::SameLine(); ImGui::Text("[%d]", i); }
             ImGui::Text("NavInputs duration:"); for (int i = 0; i < IM_ARRAYSIZE(io.NavInputs); i++) if (io.NavInputsDownDuration[i] >= 0.0f)   { ImGui::SameLine(); ImGui::Text("[%d] %.2f", i, io.NavInputsDownDuration[i]); }